EP0931626A1 - Fastening tool with a piston driven by compressed gas - Google Patents

Fastening tool with a piston driven by compressed gas Download PDF

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Publication number
EP0931626A1
EP0931626A1 EP99400187A EP99400187A EP0931626A1 EP 0931626 A1 EP0931626 A1 EP 0931626A1 EP 99400187 A EP99400187 A EP 99400187A EP 99400187 A EP99400187 A EP 99400187A EP 0931626 A1 EP0931626 A1 EP 0931626A1
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EP
European Patent Office
Prior art keywords
cylinder
sleeve
buffer guide
support
combustion chamber
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
EP99400187A
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German (de)
French (fr)
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EP0931626B1 (en
Inventor
Frédéric Nayrac
Guy Jaillet
Patrick Herelier
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Societe de Prospection et dInventions Techniques SPIT SAS
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Societe de Prospection et dInventions Techniques SPIT SAS
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Publication of EP0931626A1 publication Critical patent/EP0931626A1/en
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Publication of EP0931626B1 publication Critical patent/EP0931626B1/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

Definitions

  • the invention relates to a piston pad fixing device powered by compressed gas comprising a buffer guide, a cylinder in which is mounted the piston, a combustion chamber sleeve intended to close the rear chamber with a cylinder head and, at the front, with the piston and the cylinder, a sensor for closing the chamber, an injection pipe for compressed gas in the chamber from a compressed gas cartridge and ignition means intended to explode the gas contained in the combustion chamber during a shot.
  • document EP-0 788 863 proposes an apparatus of the type defined above, in which the buffer guide makes probe function for pressing and closing the chamber combustion, and comprising mechanical isolation springs arranged between the cylinder and a pad guide holder integral with the pad guide, the cylinder can move forwards with respect to the pad guide holder, against the action of the insulation springs.
  • the cylinder is driven forward and compresses the springs then, on firing, under the action of the recoil force, the cylinder moves back and releases the springs, the buffer guide thus being held in abutment against the material thanks to the insulation springs.
  • Such an apparatus has a relatively complex structure. Furthermore, when when the device is pressed, an operator must try to compress the insulation spring.
  • the present invention proposes to solve these problems.
  • the invention relates to a tampon fixing device in a support, with piston propelled by compressed gas comprising a cylinder in which is mounted the piston, a combustion chamber, a sleeve combustion chamber intended to close the chamber, at the rear, with a cylinder head and, at the front, with the piston and the cylinder, a buffer guide making probe function for pressing and closing the chamber combustion, apparatus characterized in that it comprises a surface of thrust and a bearing surface, respectively integral with the buffer guide and of the sleeve and arranged to join in translation backwards, when the buffer guide is pressed, in order to close the combustion, and to dissociate when the device recedes in reaction to a shot, in order to ensure the support of the buffer guide against the support.
  • the sleeve and the feeler pad guide cooperating with a single press may retreat, retreating in response to the explosion of compressed gas in the combustion chamber, without driving the buffer guide.
  • the device comprises means for driving towards the rear of the sleeve, integral with the sleeve, and which are integral said front bearing surface.
  • the drive means comprise at least an integral drive arm, at one of its ends, a support finger provided with said front bearing surface.
  • the buffer guide may include a groove for receiving the support finger, provided with a front wall acting as a pushing surface.
  • the device comprises a housing which is secured to the cylinder and a pad guide holder secured to the cylinder, in which the buffer guide is slidably mounted.
  • the cylinder could move relative to the door pad guide integral with the pad guide, while in the invention, the cylinder is integral with the door of the buffer guide in which is mounted sliding the pad guide, which turns out to be a simpler structure to achieve.
  • the fixing device may also include means for returning to the front of the drive means, in order to recall the buffer guide towards the front, in a rest position, when removed from support.
  • the fixing device shown comprises, conventionally, in a case 1, rear cylinder head 2, combustion chamber 3, sleeve combustion chamber 4, a cylinder 5, a piston 6, a buffer guide 8 and a door of the buffer guide 7. All these elements of the apparatus are of axis 9.
  • the piston 6, provided with a rear head, is slidably mounted in the cylinder 5 which is integral with the housing 1.
  • the sliding of the pad guide 2 in the pad guide holder 7 is limited by a bush 42, integral with the pad guide holder 7, comprising a part front 13 mounted around the pad guide holder 7 and a part posterior 44, narrowed, surrounding the buffer guide 8, in line with a opening 47 made in the tampon guide holder 7.
  • the rear part 44 of the sleeve 42 is slidably mounted on the buffer guide 8 between front 45 and rear 46 stops of the buffer guide 8 in order to limit the relative sliding of the latter relative to the buffer guide holder 7.
  • the combustion chamber sleeve 4 is slidably mounted on the cylinder 5 and comprises, at the rear, a neck 10 provided with an annular rim rear 11 and intended to be fitted around a corresponding part 12 of the cylinder head 2 until the flange 11 abuts against a surface corresponding 13 of the cylinder head 2, in order to close the combustion chamber 3 at the back.
  • Part 12 comprises an external annular groove carrying a seal 14.
  • the sleeve 4 is also intended to close the combustion 3, at the front, with the piston 6 and the cylinder 5 which saves rear an external annular groove carrying a seal 15. Seals 14 and 15 are intended to seal respectively between the sleeve 4 and the cylinder head 2 and between cylinder 5 and sleeve 4.
  • the head of the piston 6 houses two external peripheral annular grooves bearing seals 6 ', 6 "intended to ensure the seal between the cylinder 5 and the piston head 6.
  • the apparatus further comprises a housing for receiving a cartridge of compressed gas, not shown.
  • An injection pipe connected to the cartridge compressed gas, opens into the combustion chamber 3, through the cylinder head 2, for injecting the compressed gas into chamber 3.
  • the injection pipe is not shown.
  • the cylinder head 2 carries a mixing fan 16, a firing device, not shown, and a switch 17 for controlling the fan 16 intended to be actuated by the rear edge 11 of the neck 10 when the latter comes into abutment against the surface 13 of the cylinder head 2.
  • the cylinder 5 contains at the front a shock absorber 18, integral with the cylinder 5, against which the head of the piston 6, propelled forward when fired, is intended to come up against.
  • a buffer supply magazine 19 communicates with the buffer guide 8, for loading the buffer into the buffer guide 8.
  • Two arms 20, 21 for driving towards the rear of the sleeve 4, symmetrical from each other with respect to the axis 9, extend substantially along and at the outside of the buffer guide holder 7 and of the cylinder 5 and are secured, here by screwing, from the sleeve 4, at their rear ends.
  • the two drive arms 20, 21 are connected to each other by a part link 22, at their anterior ends.
  • the finger 23 extends through a light 27, formed in the buffer guide holder 7, and is received in a groove 25 external formed in the buffer guide 8 and parallel to the axis 9.
  • connection part 22 household a lumen 48 for passing the screws 41 extending parallel to the axis 9 and allowing the finger 23 and the set of two arms 20 to be offset axially, 21 and part 22, depending on the desired penetration of the tampon into the support.
  • the buffer guide 8 acts as a pressing and closing feeler of the combustion chamber 3, via the drive arms 20, 21.
  • Each of the drive arms 20, 21 comprises, in the vicinity of its rear end, a thrust pin 24, 26 folded towards the cylinder 5, substantially at right angles.
  • the two push fingers 24, 26 are mounted sliding on cylinder 5 respectively against the action of two springs 35, 36 forwards forward which are in support, at the rear, against two bearing surfaces 37, 38 of the cylinder 5 and, at the front, against the fingers 24, 26.
  • the springs 35, 36 are intended to return towards the front, in the position of rest, the drive arms 20, 21 and therefore the sleeve 4, when from the support outlet of the device, as will be explained in the description of the device's operation.
  • the cylinder 5 further comprises two external front stops 39, 40, for the fingers 24, 26, symmetrical to each other with respect to the axis 9, intended to limit the forward sliding of the arms 20, 21 relative to the cylinder 5.
  • the buffer guide 8 When the device presses against the support 100, the buffer guide 8 is driven rearward relative to the buffer guide holder 7, to the cylinder 5 and to the housing 1.
  • the thrust surface 30 of the buffer guide 8 and the surface support 29 integral with the drive arms 20, 21, bearing one against the other, are integral in rearward translation. Therefore, under the action of moving the buffer guide 8, the drive arms 20, 21 drive the sleeve 4 towards the rear, until the rear edge 11 of the neck 10 of the sleeve 4 abuts against the surface 13 of the cylinder head 2.
  • the combustion chamber 3 In this position of the sleeve 4, the combustion chamber 3 is closed at the rear by the cylinder head 2 and, at the front, by the head of the piston 6 and the cylinder 5 ( Figures 3 and 4).
  • the firing device When fired, the firing device explodes the compressed gas contained in combustion chamber 3, which creates pressure inside the chamber 3 under the action of which the piston 6 is propelled forward. A buffer having been placed in the buffer guide 8, the piston 6 comes strike the tampon which is propelled forward and fixes itself in the support 100. At the end of the stroke, the head of the piston 6 abuts against the damper 18.
  • the shot causes in reaction a recoil force which tends to recoil the device.
  • the bearing surface 29 of the finger 2 secured to the arms 20, 21 is detached from the pushing surface 30 of the buffer guide 8 so that the buffer guide 8 does not move back and the supporting finger 23 slides backwards in the throat of reception 25. Thanks to this, the buffer guide 8 is held in abutment against the support 100, despite the retreat of the cylinder head-housing-cylinder-door assembly buffer guide-sleeve-drive arm 2, 1, 5, 7, 4, 20, 21.
  • the combustion gases escape from the cylinder 5 and the combustion chamber 3, in known manner, by a valve exhaust.
  • the piston 6 is driven rearward by vacuum and returns to the rest position.
  • the return springs 35, 36 relax and drive forward the drive arms 20, 21, the buffer guide 8 and the sleeve 4 which return to the rest position.
  • the combustion chamber 3 thus opens again at the rear.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Fluid-Damping Devices (AREA)
  • Telephone Function (AREA)
  • Compressor (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The fixing tool, comprising a gas-propelled piston (6) inside a cylinder (5), a combustion chamber (3) and sleeve (4), and a plug guide (8), has pusher (30) and thrust (29) surfaces on the plug guide and sleeve respectively. The pusher and thrust surfaces are designed to meet on a rearward movement to close the combustion chamber, and separate on the recoil to ensure that the guide is held against the support (100).

Description

L'invention concerne un appareil de fixation de tampon à piston propulsé par gaz comprimé comprenant un guide-tampon, un cylindre dans lequel est monté le piston, un manchon de chambre de combustion destiné à fermer la chambre à l'arrière avec une culasse et, à l'avant, avec le piston et le cylindre, un palpeur de fermeture de la chambre, un conduit d'injection de gaz comprimé dans la chambre depuis une cartouche de gaz comprimé et des moyens d'allumage destinés à faire exploser le gaz contenu dans la chambre de combustion lors d'un tir.The invention relates to a piston pad fixing device powered by compressed gas comprising a buffer guide, a cylinder in which is mounted the piston, a combustion chamber sleeve intended to close the rear chamber with a cylinder head and, at the front, with the piston and the cylinder, a sensor for closing the chamber, an injection pipe for compressed gas in the chamber from a compressed gas cartridge and ignition means intended to explode the gas contained in the combustion chamber during a shot.

Au tir, l'explosion du gaz dans la chambre induit en réaction une force de recul qui tend à faire décoller l'appareil, et surtout le guide-tampon, du matériau support sur lequel il est en appui. Un tel décollement s'avère généralement néfaste à la fixation du tampon qui, au lieu de s'enfoncer dans le matériau, se crochète, ou même se casse, notamment dans le cas où le matériau est dur, en béton par exemple.When fired, the explosion of the gas in the chamber induces in reaction a force of setback which tends to make the device, and especially the pad guide, take off from the support material on which it is supported. Such detachment turns out generally harmful to the attachment of the tampon which, instead of sinking into the material, hooks, or even breaks, especially in the case where the material is hard, in concrete for example.

Pour résoudre ce problème, le document EP-0 788 863 propose un appareil de fixation du type défini ci-dessus, dans lequel le guide-tampon fait fonction de palpeur de mise en appui et de fermeture de la chambre de combustion, et comprenant des ressorts d'isolation mécanique disposés entre le cylindre et un porte guide-tampon solidaire du guide-tampon, le cylindre pouvant se déplacer vers l'avant par rapport au porte guide-tampon, contre l'action des ressorts d'isolation. Lors de la mise en appui de l'appareil contre le matériau, le cylindre est entraíné vers l'avant et comprime les ressorts puis, au tir, sous l'action de la force de recul, le cylindre recule et relâche les ressorts, le guide-tampon étant ainsi maintenu en appui contre le matériau grâce aux ressorts d'isolation.To solve this problem, document EP-0 788 863 proposes an apparatus of the type defined above, in which the buffer guide makes probe function for pressing and closing the chamber combustion, and comprising mechanical isolation springs arranged between the cylinder and a pad guide holder integral with the pad guide, the cylinder can move forwards with respect to the pad guide holder, against the action of the insulation springs. When the device is pressed against the material, the cylinder is driven forward and compresses the springs then, on firing, under the action of the recoil force, the cylinder moves back and releases the springs, the buffer guide thus being held in abutment against the material thanks to the insulation springs.

Un tel appareil présente un structure relativement complexe. En outre, lors de la mise en appui de l'appareil, un opérateur doit s'efforcer de comprimer le ressort d'isolation.Such an apparatus has a relatively complex structure. Furthermore, when when the device is pressed, an operator must try to compress the insulation spring.

La présente invention propose de résoudre ces problèmes.The present invention proposes to solve these problems.

A cet effet, l'invention concerne un appareil de fixation de tampon dans un support, à piston propulsé par gaz comprimé comprenant un cylindre dans lequel est monté le piston, une chambre de combustion, un manchon de chambre de combustion destiné à fermer la chambre, à l'arrière, avec une culasse et, à l'avant, avec le piston et le cylindre, un guide-tampon faisant fonction de palpeur de mise en appui et de fermeture de la chambre de combustion, appareil caractérisé par le fait qu'il comprend une surface de poussée et une surface d'appui, respectivement solidaires du guide-tampon et du manchon et agencées pour se solidariser en translation vers l'arrière, lors de la mise en appui du guide-tampon, afin de fermer la chambre de combustion, et pour se désolidariser au recul de l'appareil en réaction à un tir, afin d'assurer le maintien en appui du guide-tampon contre le support.To this end, the invention relates to a tampon fixing device in a support, with piston propelled by compressed gas comprising a cylinder in which is mounted the piston, a combustion chamber, a sleeve combustion chamber intended to close the chamber, at the rear, with a cylinder head and, at the front, with the piston and the cylinder, a buffer guide making probe function for pressing and closing the chamber combustion, apparatus characterized in that it comprises a surface of thrust and a bearing surface, respectively integral with the buffer guide and of the sleeve and arranged to join in translation backwards, when the buffer guide is pressed, in order to close the combustion, and to dissociate when the device recedes in reaction to a shot, in order to ensure the support of the buffer guide against the support.

Le manchon et le guide-tampon palpeur coopérant par simple appui, sans être fixés l'un à l'autre, pour fermer la chambre de combustion, le manchon peut reculer, au recul en réaction à l'explosion du gaz comprimé dans la chambre de combustion, sans entraíner le guide-tampon.The sleeve and the feeler pad guide cooperating with a single press, without be fixed to each other, to close the combustion chamber, the sleeve may retreat, retreating in response to the explosion of compressed gas in the combustion chamber, without driving the buffer guide.

Avantageusement, l'appareil comprend des moyens d'entraínement vers l'arrière du manchon, solidaires du manchon, et desquels sont solidaires ladite surface avant d'appui.Advantageously, the device comprises means for driving towards the rear of the sleeve, integral with the sleeve, and which are integral said front bearing surface.

Avantageusement encore, les moyens d'entraínement comprennent au moins un bras d'entraínement solidaire, à l'une de ses extrémités, d'un doigt d'appui pourvu de ladite surface avant d'appui.Advantageously also, the drive means comprise at least an integral drive arm, at one of its ends, a support finger provided with said front bearing surface.

Dans ce cas, le guide-tampon peut comprendre une gorge de réception du doigt d'appui, pourvue d'une paroi avant faisant office de surface de poussée.In this case, the buffer guide may include a groove for receiving the support finger, provided with a front wall acting as a pushing surface.

Dans une forme de réalisation particulière, l'appareil comprend un boítier duquel est solidaire le cylindre et un porte guide-tampon solidaire du cylindre, dans lequel est monté coulissant le guide-tampon.In a particular embodiment, the device comprises a housing which is secured to the cylinder and a pad guide holder secured to the cylinder, in which the buffer guide is slidably mounted.

Dans l'art antérieur, le cylindre pouvait se déplacer par rapport au porte guide-tampon solidaire du guide-tampon, alors que dans l'invention, le cylindre est solidaire du porte du guide-tampon dans lequel est monté coulissant le guide-tampon, ce qui s'avère être une structure plus simple à réaliser.In the prior art, the cylinder could move relative to the door pad guide integral with the pad guide, while in the invention, the cylinder is integral with the door of the buffer guide in which is mounted sliding the pad guide, which turns out to be a simpler structure to achieve.

L'appareil de fixation peut également comprendre des moyens de rappel vers l'avant des moyens d'entraínement, afin de rappeler le guide-tampon vers l'avant, dans une position de repos, lorsqu'on le retire d'appui. The fixing device may also include means for returning to the front of the drive means, in order to recall the buffer guide towards the front, in a rest position, when removed from support.

L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation particulière de l'appareil de fixation de l'invention en référence au dessin annexé sur lequel:

  • la figure 1 représente une vue en coupe axiale de l'appareil de fixation, au repos;
  • la figure 2 représente une vue en coupe axiale de l'appareil de fixation de la figure 1, au repos, dans le plan de coupe II-II perpendiculaire au plan de coupe de la figure 1;
  • la figure 3 représente une vue en coupe de l'appareil de la figure 1, lors d'une mise en appui, dans le plan de coupe de la figure 1;
  • la figure 4 représente une vue en coupe de l'appareil de la figure 3, lors de la mise en appui, dans le plan de coupe IV-IV perpendiculaire au plan de coupe de la figure 3 et
  • la figure 5 représente une vue en perspective de l'appareil de la figure 1, sans boítier.
The invention will be better understood using the following description of a particular embodiment of the fixing device of the invention with reference to the attached drawing in which:
  • Figure 1 shows an axial sectional view of the fixing device, at rest;
  • 2 shows an axial sectional view of the fixing device of Figure 1, at rest, in the section plane II-II perpendicular to the section plane of Figure 1;
  • 3 shows a sectional view of the device of Figure 1, when resting, in the section plane of Figure 1;
  • FIG. 4 represents a cross-sectional view of the apparatus of FIG. 3, when placed in abutment, in the cutting plane IV-IV perpendicular to the cutting plane of FIG. 3 and
  • Figure 5 shows a perspective view of the device of Figure 1, without housing.

L'appareil de fixation représenté comporte, de façon classique, dans un boítier 1, une culasse arrière 2, une chambre de combustion 3, un manchon de chambre de combustion 4, un cylindre 5, un piston 6, un guide-tampon 8 et un porte du guide-tampon 7. Tous ces éléments de l'appareil sont d'axe 9. Le piston 6, pourvu d'une tête postérieure, est monté coulissant dans le cylindre 5 qui est solidaire du boítier 1.The fixing device shown comprises, conventionally, in a case 1, rear cylinder head 2, combustion chamber 3, sleeve combustion chamber 4, a cylinder 5, a piston 6, a buffer guide 8 and a door of the buffer guide 7. All these elements of the apparatus are of axis 9. The piston 6, provided with a rear head, is slidably mounted in the cylinder 5 which is integral with the housing 1.

Le guide-tampon 8, faisant saillie hors du boítier 1 à l'avant, est monté coulissant dans le porte guide-tampon 7 qui est solidaire du boítier 1. Le coulissement du guide-tampon 2 dans le porte guide-tampon 7 est limité par une douille 42, solidaire du porte guide-tampon 7, comportant une partie antérieure 13 montée autour du porte guide-tampon 7 et une partie postérieure 44, rétrécie, entourant le guide-tampon 8, au droit d'une ouverture 47 ménagée dans le porte guide-tampon 7. La partie postérieure 44 de la douille 42 est montée coulissante sur le guide-tampon 8 entre des butées avant 45 et arrière 46 du guide-tampon 8 afin de limiter le coulissement relatif de celui-ci par rapport au porte guide-tampon 7. The buffer guide 8, protruding from the housing 1 at the front, is mounted sliding in the buffer guide holder 7 which is integral with the housing 1. The sliding of the pad guide 2 in the pad guide holder 7 is limited by a bush 42, integral with the pad guide holder 7, comprising a part front 13 mounted around the pad guide holder 7 and a part posterior 44, narrowed, surrounding the buffer guide 8, in line with a opening 47 made in the tampon guide holder 7. The rear part 44 of the sleeve 42 is slidably mounted on the buffer guide 8 between front 45 and rear 46 stops of the buffer guide 8 in order to limit the relative sliding of the latter relative to the buffer guide holder 7.

Le manchon de chambre de combustion 4 est monté coulissant sur le cylindre 5 et comprend, à l'arrière, un col 10 pourvu d'un rebord annulaire arrière 11 et destiné à s'emmancher autour d'une partie correspondante 12 de la culasse 2 jusqu'à ce que le rebord 11 vienne en butée contre une surface correspondante 13 de la culasse 2, afin de fermer la chambre de combustion 3 à l'arrière. La partie 12 comprend une gorge annulaire externe portant un joint 14. Le manchon 4 est également destiné à fermer la chambre de combustion 3, à l'avant, avec le piston 6 et le cylindre 5 qui ménage à l'arrière une gorge annulaire externe portant un joint 15. Les joints 14 et 15 sont destinés à assurer l'étanchéité respectivement entre le manchon 4 et la culasse 2 et entre le cylindre 5 et le manchon 4.The combustion chamber sleeve 4 is slidably mounted on the cylinder 5 and comprises, at the rear, a neck 10 provided with an annular rim rear 11 and intended to be fitted around a corresponding part 12 of the cylinder head 2 until the flange 11 abuts against a surface corresponding 13 of the cylinder head 2, in order to close the combustion chamber 3 at the back. Part 12 comprises an external annular groove carrying a seal 14. The sleeve 4 is also intended to close the combustion 3, at the front, with the piston 6 and the cylinder 5 which saves rear an external annular groove carrying a seal 15. Seals 14 and 15 are intended to seal respectively between the sleeve 4 and the cylinder head 2 and between cylinder 5 and sleeve 4.

La tête du piston 6 ménage deux gorges annulaires périphériques externes portant des joints d'étanchéité 6', 6" destinés à assurer l'étanchéité entre le cylindre 5 et la tête du piston 6.The head of the piston 6 houses two external peripheral annular grooves bearing seals 6 ', 6 "intended to ensure the seal between the cylinder 5 and the piston head 6.

L'appareil comprend en outre un logement de réception d'une cartouche de gaz comprimé, non représenté. Un conduit d'injection, relié à la cartouche de gaz comprimé, débouche dans la chambre de combustion 3, par la culasse 2, pour l'injection du gaz comprimé dans la chambre 3. Le conduit d'injection n'est pas représenté.The apparatus further comprises a housing for receiving a cartridge of compressed gas, not shown. An injection pipe, connected to the cartridge compressed gas, opens into the combustion chamber 3, through the cylinder head 2, for injecting the compressed gas into chamber 3. The injection pipe is not shown.

La culasse 2 porte un ventilateur de mélange 16, un dispositif de mise à feu, non représenté, et un interrupteur 17 de commande du ventilateur 16 destiné à être actionné par le rebord arrière 11 du col 10 lorsque celui-ci vient en butée contre la surface 13 de la culasse 2.The cylinder head 2 carries a mixing fan 16, a firing device, not shown, and a switch 17 for controlling the fan 16 intended to be actuated by the rear edge 11 of the neck 10 when the latter comes into abutment against the surface 13 of the cylinder head 2.

Le cylindre 5 contient à l'avant un amortisseur 18, solidaire du cylindre 5, contre lequel la tête du piston 6, propulsée vers l'avant lors d'un tir, est destinée à venir buter.The cylinder 5 contains at the front a shock absorber 18, integral with the cylinder 5, against which the head of the piston 6, propelled forward when fired, is intended to come up against.

Un magasin 19 d'alimentation en tampons communique avec le guide-tampon 8, pour le chargement de tampon dans le guide-tampon 8.A buffer supply magazine 19 communicates with the buffer guide 8, for loading the buffer into the buffer guide 8.

Deux bras 20, 21 d'entraínement vers l'arrière du manchon 4, symétriques l'un de l'autre par rapport à l'axe 9, s'étendent sensiblement le long et à l'extérieur du porte guide-tampon 7 et du cylindre 5 et sont solidarisés, ici par vissage, du manchon 4, à leurs extrémités postérieures.Two arms 20, 21 for driving towards the rear of the sleeve 4, symmetrical from each other with respect to the axis 9, extend substantially along and at the outside of the buffer guide holder 7 and of the cylinder 5 and are secured, here by screwing, from the sleeve 4, at their rear ends.

Les deux bras d'entraínement 20, 21 sont reliés l'un à l'autre par une partie de liaison 22, à leurs extrémités antérieures. Un doigt d'appui 23, pourvu d'une surface d'appui 29 orientée vers l'avant, est fixé, ici par vissage à l'aide des vis 41, à la partie de liaison 22. Le doigt 23 s'étend à travers une lumière 27, ménagée dans le porte guide-tampon 7, et est reçu dans une gorge externe 25 ménagée dans le guide-tampon 8 et parallèle à l'axe 9. La paroi antérieure de la gorge 25, orientée vers l'arrière, fait office de surface de poussée 30. La surface de poussée 30 et la surface d'appui 29 sont destinées à se solidariser en translation vers l'arrière, par appui de l'une contre l'autre, lors de la mise en appui du guide-tampon 8 contre un support, afin de fermer la chambre de combustion 3, et pour se désolidariser au recul de l'appareil en réaction au tir, afin d'assurer le maintien en appui du guide-tampon 8 contre le support, comme cela sera explicité plus précisément dans la description du fonctionnement de l'appareil. La partie de liaison 22 ménage une lumière 48 de passage des vis 41 s'étendant parallèlement à l'axe 9 et permettant de décaler axialement le doigt 23 et l'ensemble des deux bras 20, 21 et de la partie 22, suivant la pénétration souhaitée du tampon dans le support.The two drive arms 20, 21 are connected to each other by a part link 22, at their anterior ends. A support finger 23, provided a support surface 29 oriented towards the front, is fixed, here by screwing using screws 41, to the connecting part 22. The finger 23 extends through a light 27, formed in the buffer guide holder 7, and is received in a groove 25 external formed in the buffer guide 8 and parallel to the axis 9. The wall anterior of the groove 25, oriented towards the rear, acts as a surface for thrust 30. The thrust surface 30 and the bearing surface 29 are intended to join in translation backwards, by pressing one against the other, when the buffer guide 8 is pressed against a support, in order to close the combustion chamber 3, and to disengage when the appliance recedes in response to the shot, in order to maintain the support of the buffer guide 8 against the support, as will be explained more precisely in the description of the device's operation. Connection part 22 household a lumen 48 for passing the screws 41 extending parallel to the axis 9 and allowing the finger 23 and the set of two arms 20 to be offset axially, 21 and part 22, depending on the desired penetration of the tampon into the support.

Le guide-tampon 8 fait fonction de palpeur de mise en appui et de fermeture de la chambre de combustion 3, par l'intermédiaire des bras d'entraínement 20, 21.The buffer guide 8 acts as a pressing and closing feeler of the combustion chamber 3, via the drive arms 20, 21.

Chacun des bras d'entraínement 20, 21 comprend, au voisinage de son extrémité arrière, un doigt de poussée 24, 26 replié vers le cylindre 5, sensiblement à angle droit. Les deux doigts de poussée 24, 26 sont montés coulissants sur le cylindre 5 respectivement contre l'action de deux ressorts 35, 36 de rappel vers l'avant qui sont en appui, à l'arrière, contre deux surfaces d'appui 37, 38 du cylindre 5 et, à l'avant, contre les doigts 24, 26. Les ressorts 35, 36 sont destinés à rappeler vers l'avant, en position de repos, les bras d'entraínement 20, 21 et, par conséquent le manchon 4, lors de la sortie d'appui de l'appareil, comme cela sera explicité dans la description du fonctionnement de l'appareil.Each of the drive arms 20, 21 comprises, in the vicinity of its rear end, a thrust pin 24, 26 folded towards the cylinder 5, substantially at right angles. The two push fingers 24, 26 are mounted sliding on cylinder 5 respectively against the action of two springs 35, 36 forwards forward which are in support, at the rear, against two bearing surfaces 37, 38 of the cylinder 5 and, at the front, against the fingers 24, 26. The springs 35, 36 are intended to return towards the front, in the position of rest, the drive arms 20, 21 and therefore the sleeve 4, when from the support outlet of the device, as will be explained in the description of the device's operation.

Le cylindre 5 comprend en outre deux butées antérieures externes 39, 40, pour les doigts 24, 26, symétriques l'une de l'autre par rapport à l'axe 9, destinées à limiter le coulissement vers l'avant des bras 20, 21 par rapport au cylindre 5.The cylinder 5 further comprises two external front stops 39, 40, for the fingers 24, 26, symmetrical to each other with respect to the axis 9, intended to limit the forward sliding of the arms 20, 21 relative to the cylinder 5.

Après la description structurelle de l'appareil de fixation à piston propulsé, son fonctionnement va maintenant être décrit. After the structural description of the propelled piston fixing device, its operation will now be described.

En position de reposIn rest position

En position de repos de l'appareil (figures 1 et 2), les bras d'entraínement 20, 21, le manchon 4 et le guide-tampon 8, par l'intermédiaire des surfaces 29 et 30 en appui l'une contre l'autre, sont rappelés vers l'avant par les ressorts 35, 36 et la chambre de combustion 3 est ouverte à l'arrière.In the rest position of the device (Figures 1 and 2), the drive arms 20, 21, the sleeve 4 and the buffer guide 8, via the surfaces 29 and 30 pressing against each other, are biased forward by the springs 35, 36 and the combustion chamber 3 is open at the rear.

Mise en appui de l'appareil contre un support 100Pressing the device against a support 100

Lors de la mise en appui de l'appareil contre le support 100, le guide-tampon 8 est entraíné vers l'arrière par rapport au porte guide-tampon 7, au cylindre 5 et au boítier 1. La surface de poussée 30 du guide-tampon 8 et la surface d'appui 29 solidaire des bras d'entraínement 20, 21, en appui l'une contre l'autre, sont solidaires en translation vers l'arrière. Par conséquent, sous l'action du déplacement du guide-tampon 8, les bras d'entraínement 20, 21 entraínent vers l'arrière le manchon 4, jusqu'à ce que le bord arrière 11 du col 10 du manchon 4 vienne buter contre la surface 13 de la culasse 2. Dans cette position du manchon 4, la chambre de combustion 3 est fermée à l'arrière par la culasse 2 et, à l'avant, par la tête du piston 6 et le cylindre 5 (figures 3 et 4).When the device presses against the support 100, the buffer guide 8 is driven rearward relative to the buffer guide holder 7, to the cylinder 5 and to the housing 1. The thrust surface 30 of the buffer guide 8 and the surface support 29 integral with the drive arms 20, 21, bearing one against the other, are integral in rearward translation. Therefore, under the action of moving the buffer guide 8, the drive arms 20, 21 drive the sleeve 4 towards the rear, until the rear edge 11 of the neck 10 of the sleeve 4 abuts against the surface 13 of the cylinder head 2. In this position of the sleeve 4, the combustion chamber 3 is closed at the rear by the cylinder head 2 and, at the front, by the head of the piston 6 and the cylinder 5 (Figures 3 and 4).

On soulignera ici que l'entraínement vers l'arrière du manchon 4 par le guide-tampon 8 s'effectue par simple poussée de celui-là par celui-ci.It will be emphasized here that the rearward drive of the sleeve 4 by the buffer guide 8 is effected by a simple push of the latter by the latter.

Le recul des bras d'entraínement 20, 21 s'effectue contre l'action des ressorts de rappel 35, 36 qui se compriment.The recoil of the drive arms 20, 21 takes place against the action of the springs 35, 36 which compress.

Durant le recul du manchon 4, du gaz est injecté dans la chambre de combustion 3 depuis la cartouche de gaz comprimé. Lorsque le col 10 du manchon 4 vient buter contre la culasse 2, à l'arrière, son bord 11 vient actionner l'interrupteur 17 qui met en marche le ventilateur 16 afin de brasser le contenu de la chambre 3.During the retraction of the sleeve 4, gas is injected into the combustion 3 from the compressed gas cartridge. When pass 10 of sleeve 4 abuts against cylinder head 2, at the rear, its edge 11 comes actuate the switch 17 which starts the fan 16 in order to stir the contents of room 3.

TirShoot

Au tir, le dispositif de mise à feu fait exploser le gaz comprimé contenu dans la chambre de combustion 3, ce qui crée une pression à l'intérieur de la chambre 3 sous l'action de laquelle le piston 6 est propulsé vers l'avant. Un tampon ayant été mis en place dans le guide-tampon 8, le piston 6 vient frapper le tampon qui est propulsé vers l'avant et se fixe dans le support 100. En fin de course, la tête du piston 6 vient buter contre l'amortisseur 18.When fired, the firing device explodes the compressed gas contained in combustion chamber 3, which creates pressure inside the chamber 3 under the action of which the piston 6 is propelled forward. A buffer having been placed in the buffer guide 8, the piston 6 comes strike the tampon which is propelled forward and fixes itself in the support 100. At the end of the stroke, the head of the piston 6 abuts against the damper 18.

Le tir provoque en réaction une force de recul qui tend à faire reculer l'appareil. L'ensemble culasse-boítier-cylindre-porte guide-tampon-manchon-bras d'entraínement 2, 1, 5, 7, 4, 20, 21 recule. En revanche, lors de ce recul, la surface d'appui 29 du doigt 2 solidaire des bras 20, 21 se désolidarise de la surface de poussée 30 du guide-tampon 8 de sorte que le guide-tampon 8 ne recule pas et le doigt d'appui 23 coulisse vers l'arrière dans la gorge de réception 25. Grâce à cela, le guide-tampon 8 est maintenu en appui contre le support 100, en dépit du recul de l'ensemble culasse-boítier-cylindre-porte guide-tampon-manchon-bras d'entraínement 2, 1, 5, 7, 4, 20, 21.The shot causes in reaction a recoil force which tends to recoil the device. The cylinder head-housing-cylinder-guide-buffer-sleeve-arm assembly 2, 1, 5, 7, 4, 20, 21 backward. However, during this decline, the bearing surface 29 of the finger 2 secured to the arms 20, 21 is detached from the pushing surface 30 of the buffer guide 8 so that the buffer guide 8 does not move back and the supporting finger 23 slides backwards in the throat of reception 25. Thanks to this, the buffer guide 8 is held in abutment against the support 100, despite the retreat of the cylinder head-housing-cylinder-door assembly buffer guide-sleeve-drive arm 2, 1, 5, 7, 4, 20, 21.

En fin de course du piston 6, les gaz de combustion s'échappent du cylindre 5 et de la chambre de combustion 3, de façon connue, par une valve d'échappement. Le piston 6 est entraíné vers l'arrière par dépression et revient en position de repos.At the end of the piston 6 stroke, the combustion gases escape from the cylinder 5 and the combustion chamber 3, in known manner, by a valve exhaust. The piston 6 is driven rearward by vacuum and returns to the rest position.

Sortie d'appuiSupport outlet

A la sortie d'appui de l'appareil, les ressorts de rappel 35, 36 se relâchent et entraínent vers l'avant les bras d'entraínement 20, 21, le guide-tampon 8 et le manchon 4 qui reviennent en position de repos.At the bearing outlet of the device, the return springs 35, 36 relax and drive forward the drive arms 20, 21, the buffer guide 8 and the sleeve 4 which return to the rest position.

La chambre de combustion 3 s'ouvre ainsi à nouveau à l'arrière.The combustion chamber 3 thus opens again at the rear.

Claims (7)

Appareil de fixation de tampon dans un support (100), à piston (6) propulsé par gaz comprimé comprenant un cylindre (5) dans lequel est monté le piston (6), une chambre de combustion (3), un manchon de chambre de combustion (4) destiné à fermer la chambre (3), à l'arrière, avec une culasse (2) et, à l'avant, avec le piston (6) et le cylindre (5), un guide-tampon (8) faisant fonction de palpeur de mise en appui et de fermeture de la chambre de combustion (3), appareil caractérisé par le fait qu'il comprend une surface de poussée (30) et une surface d'appui (29), respectivement solidaires du guide-tampon (8) et du manchon (4), et agencées pour se solidariser en translation vers l'arrière, lors de la mise en appui du guide-tampon (8), afin de fermer la chambre de combustion (3), et pour se désolidariser au recul de l'appareil en réaction à un tir, afin d'assurer le maintien en appui du guide-tampon (8) contre le support (100).Device for fixing a tampon in a support (100), with piston (6) compressed gas powered comprising a cylinder (5) in which is mounted the piston (6), a combustion chamber (3), a sleeve combustion chamber (4) intended to close the chamber (3), at the rear, with a cylinder head (2) and, at the front, with the piston (6) and the cylinder (5), a buffer guide (8) acting as a feeler for resting and closing the combustion chamber (3), an apparatus characterized in that it comprises a pushing surface (30) and a bearing surface (29), respectively integral with the buffer guide (8) and the sleeve (4), and arranged to be secure in translation backwards, when the buffer guide is pressed (8), to close the combustion chamber (3), and to detach when the aircraft recedes in response to a shot, in order to ensure holding the buffer guide (8) against the support (100). Appareil selon la revendication 1, comprenant des moyens d'entraínement (20, 21) vers l'arrière du manchon (4), solidaires du manchon (4), et desquels sont solidaires ladite surface d'appui (29).Apparatus according to claim 1, comprising drive means (20, 21) towards the rear of the sleeve (4), integral with the sleeve (4), and which are integral with said bearing surface (29). Appareil selon la revendication 2, dans lequel les moyens d'entraínement comprennent au moins un bras d'entraínement (20, 21) solidaire, à l'une de ses extrémités, d'un doigt d'appui (23) pourvu de ladite surface d'appui (29).Apparatus according to claim 2, wherein the drive means comprise at least one drive arm (20, 21) integral with one of its ends, a support finger (23) provided with said support surface (29). Appareil selon la revendication 3, dans lequel le guide-tampon (8) comprend une gorge (25) de réception du doigt d'appui (23), pourvue d'une paroi avant faisant office de surface de poussée (30).The apparatus of claim 3, wherein the tampon guide (8) comprises a groove (25) for receiving the support finger (23), provided with a front wall acting as a pushing surface (30). Appareil selon l'une des revendications 1 à 4, comprenant un boítier (1), duquel est solidaire le cylindre (5), et un porte guide-tampon (7) solidaire du cylindre (5), dans lequel est monté coulissant le guide-tampon (8).Apparatus according to one of claims 1 to 4, comprising a housing (1), which is secured to the cylinder (5), and a buffer guide holder (7) secured to the cylinder (5), in which the buffer guide (8) is slidably mounted. Appareil de fixation selon l'une des revendications 2 à 5, comprenant des moyens (35, 36) de rappel vers l'avant des moyens d'entraínement (20, 21).Fixing device according to one of claims 2 to 5, comprising means (35, 36) for forward biasing of the drive means (20, 21). Appareil de fixation selon la revendication 6, dans lequel les moyens de rappel (35, 36) sont en appui, à l'arrière, contre le cylindre (5) et sont agencés pour coopérer à l'avant avec au moins un doigt (24, 26) solidaire des moyens d'entraínement afin de rappeler vers l'avant le manchon (4), à la sortie d'appui de l'appareil après un tir.A fixing apparatus according to claim 6, wherein the means for recall (35, 36) are supported, at the rear, against the cylinder (5) and are arranged to cooperate at the front with at least one finger (24, 26) integral drive means to recall the sleeve (4) forward, at the support output from the device after a shot.
EP99400187A 1998-01-27 1999-01-27 Fastening tool with a piston driven by compressed gas Expired - Lifetime EP0931626B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9800840 1998-01-27
FR9800840A FR2774017B1 (en) 1998-01-27 1998-01-27 COMPRESSED GAS-PISTON FIXING APPARATUS

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EP0931626A1 true EP0931626A1 (en) 1999-07-28
EP0931626B1 EP0931626B1 (en) 2003-04-16

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US (1) US6138887A (en)
EP (1) EP0931626B1 (en)
AT (1) ATE237434T1 (en)
AU (1) AU709218B1 (en)
CA (1) CA2260357C (en)
DE (1) DE69906833T2 (en)
ES (1) ES2196733T3 (en)
FR (1) FR2774017B1 (en)
NO (1) NO311752B1 (en)
NZ (1) NZ333932A (en)

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Also Published As

Publication number Publication date
ES2196733T3 (en) 2003-12-16
NO990352L (en) 1999-07-28
CA2260357A1 (en) 1999-07-27
DE69906833D1 (en) 2003-05-22
CA2260357C (en) 2002-07-09
AU709218B1 (en) 1999-08-26
US6138887A (en) 2000-10-31
NO990352D0 (en) 1999-01-26
FR2774017B1 (en) 2000-03-17
ATE237434T1 (en) 2003-05-15
NZ333932A (en) 2000-07-28
NO311752B1 (en) 2002-01-21
FR2774017A1 (en) 1999-07-30
DE69906833T2 (en) 2004-01-22
EP0931626B1 (en) 2003-04-16

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