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EP2332695B1 - Combustion-powered fastener-driving tool with chamber opening and closing stop - Google Patents

Combustion-powered fastener-driving tool with chamber opening and closing stop Download PDF

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Publication number
EP2332695B1
EP2332695B1 EP10194548.3A EP10194548A EP2332695B1 EP 2332695 B1 EP2332695 B1 EP 2332695B1 EP 10194548 A EP10194548 A EP 10194548A EP 2332695 B1 EP2332695 B1 EP 2332695B1
Authority
EP
European Patent Office
Prior art keywords
chamber
cylinder
tool
tool according
opening
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.)
Not-in-force
Application number
EP10194548.3A
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German (de)
French (fr)
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EP2332695A1 (en
Inventor
Pierre Cordeiro
Ludovic Rousson
Alain Vettoretti
Patrick Herelier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe de Prospection et dInventions Techniques SPIT SAS
Original Assignee
Societe de Prospection et dInventions Techniques SPIT SAS
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Publication of EP2332695A1 publication Critical patent/EP2332695A1/en
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Publication of EP2332695B1 publication Critical patent/EP2332695B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure

Definitions

  • the invention relates to a hand-held attachment tool for driving fastening elements in a support material, comprising an internal combustion engine with a chamber for receiving a dose of fuel, the ignition of which causes a displacement piston to move. in a cylinder which, in turn, will cause a displacement element to move.
  • the hand tools concerned by the invention are, in particular, nailers, staplers ( US-A1-2005 / 0173489 ).
  • the ignition of the fuel which comes from a cartridge housed in the tool, is performed by a spark plug carried by a rear yoke.
  • This firing can be performed after closing the chamber, that is to say after the chamber has been driven backward movement against the cylinder head.
  • This movement of the chamber is effected by placing the tool in abutment against the support material, which pushes the buffer guide towards the rear, which is the part by which the support is made, the buffer guide carrying with him, by means of a stirrup, a cage of which the room is solidary.
  • the chamber is indifferently referred to as the fuel receiving space or the movable wall of the tool making it possible to limit this space.
  • the invention of the present application therefore aims to provide a tool of the type defined above of simple construction, in which the chamber can come into abutment before and in rear stop safely.
  • the invention therefore relates to a tool according to claim 1.
  • the tool can be a very simple assembly, easy maintenance and an attractive cost.
  • the opening spring is mounted in a rear support against the cylinder and in front support against an intermediate bracket to which is fixed the cage.
  • Each chamber abutment is arranged to slide on a path formed on the side of the cylinder;
  • the sliding path may be a groove formed on the surface of the cylinder and the stop has a shoe engaged in the groove or a bar attached to the cylinder and the stop has a shoe in which is formed a groove for receiving the bar.
  • the opening and closing chamber stops may be rigid or of damping material.
  • the tool that will now be described here is a nailer for driving nails in a support material against which the tool must be supported for allow the firing of a dose of a mixture of air and fuel previously introduced into a combustion chamber 1 of an internal combustion engine 2 of the tool ( figure 2 ).
  • the engine comprises a cylinder 3 of axis 4 in which is slidably mounted a piston 5, with a head 6 and a rod 7 extending along the axis 4 and engaged in an axial bore 8 of a buffer guide 9 in which was introduced a nail to be driven by the piston rod 7 in the support material.
  • the buffer guide 9 is slidably mounted in a support 10 fixed to the front of the cylinder 3.
  • the engine 2 further comprises a chamber wall 11 (also referred to as a chamber), of axis 4, slidably mounted on the cylinder 3 to form the combustion chamber 1 between the wall 11, the piston head 6 and a rear yoke 12 carrying a spark plug 36 for igniting the mixture in the chamber 1 for igniting the mixture, the propulsion of the piston 5 and the drive of the nail introduced into the buffer guide 9.
  • the tool which will now be described comprises in the chamber 1, a fan 13, with its motor 16, providing a mixing function and a cooling function.
  • the chamber wall has an anterior portion 14 and a rear portion 15 for covering the yoke 12.
  • each groove 17 is formed between two ribs 51, 52 extending on the surface of the cylinder.
  • the chamber wall 11, in the front part 14, is arranged on two diametrically opposite lateral sides and corresponding to the two grooves of the cylinder, to receive a lateral chamber stop 18 which projects inwards into the corresponding groove 17 of the cylinder lying the same side of the axis 4 of the tool ( figure 5 ).
  • the two chamber stops 18 are in the form of blocks, or pads, here of damping material. More specifically, each chamber stop 18 is housed in a casing 19 formed near the front edge 20 of the front portion 14 of the chamber wall 11. The casing 19 is fixed to the corresponding bottom 25 (26) of the cage 21 by a pin 50.
  • the chamber wall 11 is attached to the rear of a chamber 21 closing-chamber opening fixed at the front to an intermediate cage stirrup 22.
  • the cage 21 here comprises two pairs 23, 24 of rear arms lateral members being able to move on the surface of the cylinder 3, the two arms 25, 26 of each pair being fixed at the rear here on the housing 19 for receiving the chamber abutment 18 situated on the same side.
  • the two rear arms 25, 26 of each pair 23, 24 are joined in two forearms 27, 28 fixed, at the front, to the yoke 22.
  • the caliper 22 is mounted movable in translation on the support 10 of the buffer guide. It is therefore secured to the cage 21 in translation both forwardly and backwardly.
  • the buffer guide 9 It is integral in translation of the buffer guide 9 only towards the front or, conversely, the buffer guide 9 is integral in translation with the stirrup 22 only towards the rear.
  • This latter connection is made here by a rear support leg 29 of the buffer guide 9.
  • the cage stirrup 22 carries a knob 37 for adjusting the protrusion of the front end of the piston rod 7 out of the front end of the buffer guide 9. But this is not the object of the invention of the present application.
  • the wheel 37 is rotatably mounted between a rear axle 38 and a front axle 39 of the caliper 22 serving as bearings for a wheel shaft 31 (FIG. figure 2 ) mounted in these bearings.
  • the rear portion of the wheel shaft 31 serves as a guide to a spring 32 for opening the chamber and prevents the spring from flaming.
  • the front portion of the shaft 31 of the wheel 37 has, at its end, a disk 30 for pushing the buffer guide 9, disk whose peripheral edge forms a flange 40 of posterior support against the front bridge 39 of the cage stirrup 20.
  • the buffer guide comprises the support leg 29 ending at the rear by a support disc 41 intended to receive the thrust of the disc 30 of the wheel shaft 31.
  • the spring 32 is a single and central opening spring. It is mounted at the rear bearing in a housing 33 of the front part of the cylinder 3. At the front, it bears against the rear deck 38 of the cage stirrup 22.
  • the two chamber stops 18 are single stops for opening and closing of chamber.
  • the spring 32 relaxes, pushes the cage stirrup 22 forward, the cage 21 pulls the chamber wall 11, 14, 15 towards the front on the cylinder 3 until the abutments 18 come into abutting abutment against the anterior bottom 34 of the grooves 17 ( figure2 ).
  • the operator puts the tool in contact with the receiving material.
  • the buffer guide 9 is pushed back, its support leg 29 pushes the thrust disc 30 which, bearing against the front part of the stirrup 22, pushes the stirrup 22 rearward; the cage 21 is also pushed backwards by driving the chamber wall 11 as well, until the rear part 15 of the chamber wall comes to cover the cylinder head 12 and the chamber abutments 18 come into closure abutment against the posterior bottom 35 of the grooves 17 ( figure 4 ).
  • the figure 5 represents a first embodiment of the chamber abutment and its sliding path which is a groove formed in the cylinder surface, in which is the thrust pad is slidably mounted.
  • the figure 6 represents an alternative embodiment, almost inverted. It is in the stop shoe 55 which has a groove, or groove 53, in which extends a bar 54 formed on the surface of the cylinder.
  • the other elements are identical and bear the same references.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Description

L'invention concerne un outil de fixation à main, pour entraîner des éléments de fixation dans un matériau support, comprenant un moteur à combustion interne avec une chambre destinée à recevoir une dose de combustible dont la mise à feu entraîne un piston de propulsion en déplacement dans un cylindre qui, à son tour, entraînera en déplacement un élément de fixation.The invention relates to a hand-held attachment tool for driving fastening elements in a support material, comprising an internal combustion engine with a chamber for receiving a dose of fuel, the ignition of which causes a displacement piston to move. in a cylinder which, in turn, will cause a displacement element to move.

Les outils à main concernés par l'invention sont, notamment, des cloueurs, des agrafeuses ( US-A1-2005/0173489 ).The hand tools concerned by the invention are, in particular, nailers, staplers ( US-A1-2005 / 0173489 ).

La mise à feu du combustible, qui provient d'une cartouche logée dans l'outil, s'effectue par une bougie d'allumage portée par une culasse arrière. Cette mise à feu ne peut s'effectuer qu'après fermeture de la chambre, c'est-à-dire après que la chambre ait été entraînée en déplacement vers l'arrière contre la culasse. Ce déplacement de la chambre s'effectue par la mise en appui de l'outil contre le matériau support, qui repousse le guide-tampon vers l'arrière, qui est la pièce par laquelle s'effectue l'appui, le guide-tampon entraînant avec lui, par l'intermédiaire d'un étrier, une cage de laquelle la chambre est solidaire. On notera qu'on appelle chambre indifféremment l'espace de réception du combustible ou la paroi mobile de l'outil permettant de limiter cet espace.The ignition of the fuel, which comes from a cartridge housed in the tool, is performed by a spark plug carried by a rear yoke. This firing can be performed after closing the chamber, that is to say after the chamber has been driven backward movement against the cylinder head. This movement of the chamber is effected by placing the tool in abutment against the support material, which pushes the buffer guide towards the rear, which is the part by which the support is made, the buffer guide carrying with him, by means of a stirrup, a cage of which the room is solidary. It will be noted that the chamber is indifferently referred to as the fuel receiving space or the movable wall of the tool making it possible to limit this space.

Dans son déplacement vers l'avant, quand l'opérateur ouvre l'outil, la chambre vient en butée contre le cylindre par l'intermédiaire d'une pièce de butée. Dans son déplacement vers l'arrière, la chambre, comme on l'a vu plus haut, vient en butée contre la culasse. Cette mise en butée arrière s'effectue souvent brutalement, avec un risque que l'une ou l'autre des pièces ne se casse. On a déjà proposé, comme dans le document FR 2858261 , une pièce de butée arrière intermédiaire, mais au détriment de la simplicité de l'outil.In its forward movement, when the operator opens the tool, the chamber abuts against the cylinder via a stop piece. In its rearward movement, the chamber, as we saw above, comes into abutment against the breech. This rear abutment often takes place suddenly, with the risk that one or other of the parts will break. We have already proposed, as in the document FR 2858261 , a stop piece back intermediate, but at the expense of the simplicity of the tool.

L'invention de la présente demande vise donc à proposer un outil du type défini ci-dessus de construction simple, dans lequel la chambre puisse venir en butée avant et en butée arrière en toute sécurité.The invention of the present application therefore aims to provide a tool of the type defined above of simple construction, in which the chamber can come into abutment before and in rear stop safely.

Avant de présenter l'invention, on rappellera que le déplacement de la chambre vers l'avant, à l'ouverture de l'outil, s'effectue par des moyens de rappel qui agissent sur le guide-tampon pour le pousser vers l'avant et qui entraînent la cage et la chambre en position d'ouverture.Before presenting the invention, it will be recalled that the displacement of the chamber towards the front, at the opening of the tool, is effected by means of return which act on the buffer guide to push it towards the before and which drive the cage and the chamber in the open position.

Et bien l'invention concerne donc un outil selon la revendication 1.Well, the invention therefore relates to a tool according to claim 1.

Grâce à l'invention, l'outil peut-être d'un montage très simple, d'un entretien facile et d'un coût intéressant.Thanks to the invention, the tool can be a very simple assembly, easy maintenance and an attractive cost.

Dans la forme de réalisation préférée de l'outil de l'invention, le ressort d'ouverture est monté en appui arrière contre le cylindre et en appui avant contre un étrier intermédiaire auquel est fixée la cage.In the preferred embodiment of the tool of the invention, the opening spring is mounted in a rear support against the cylinder and in front support against an intermediate bracket to which is fixed the cage.

Chaque butée de chambre est agencée pour coulisser sur un chemin ménagé sur le côté du cylindre ; le chemin de coulissement peut être une rainure formée à la surface du cylindre et la butée comporte un patin engagé dans la rainure ou une barrette rapportée sur le cylindre et la butée comporte un patin dans lequel est ménagée une gorge de réception de la barrette.Each chamber abutment is arranged to slide on a path formed on the side of the cylinder; the sliding path may be a groove formed on the surface of the cylinder and the stop has a shoe engaged in the groove or a bar attached to the cylinder and the stop has a shoe in which is formed a groove for receiving the bar.

Les butées de chambre d'ouverture et de fermeture peuvent être rigides ou en matériau amortisseur.The opening and closing chamber stops may be rigid or of damping material.

L'invention sera mieux comprise à l'aide de la description suivante de la forme de réalisation préférée de l'outil de l'invention, en référence au dessin annexé, sur lequel

  • la figure 1 est une vue en perspective de l'outil, chambre ouverte ;
  • la figure 2 est une vue de trois-quarts en coupe, chambre ouverte ;
  • la figure 3 est une vue en perspective de l'outil, chambre fermée et
  • la figure 4 est une vue de trois-quart en coupe, chambre fermée.
  • la figure 5 est une vue à plus grande échelle d'une première forme de réalisation de la butée de chambre et de son chemin de coulissement et
  • la figure 6 est une vue d'une deuxième forme de réalisation de la butée de chambre et de son chemin de coulissement.
The invention will be better understood with the aid of the following description of the preferred embodiment of the tool of the invention, with reference to the appended drawing, in which
  • the figure 1 is a perspective view of the tool, open chamber;
  • the figure 2 is a three-quarter sectional view, open chamber;
  • the figure 3 is a perspective view of the tool, closed chamber and
  • the figure 4 is a three-quarter sectional view, closed chamber.
  • the figure 5 is an enlarged view of a first embodiment of the chamber abutment and its sliding path and
  • the figure 6 is a view of a second embodiment of the chamber abutment and its sliding path.

L'outil qui va maintenant être décrit est ici un cloueur pour entraîner des clous dans un matériau support contre lequel l'outil doit être mis en appui pour permettre la mise à feu d'une dose d'un mélange d'air et de combustible préalablement introduite dans une chambre de combustion 1 d'un moteur à combustion interne 2 de l'outil (figure 2). Le moteur comporte un cylindre 3 d'axe 4 dans lequel est monté coulissant un piston 5, avec une tête 6 et une tige 7 s'étendant le long de l'axe 4 et engagée dans un alésage axial 8 d'un guide-tampon 9 dans lequel a été introduit un clou destiné a être entraîné, par la tige de piston 7, dans le matériau support. Le guide-tampon 9 est monté coulissant dans un support 10 fixé à l'avant du cylindre 3.
Le moteur 2 comporte encore une paroi de chambre 11 (aussi désignée chambre), d'axe 4, montée coulissante sur le cylindre 3 pour former la chambre de combustion 1 entre la paroi 11, la tête de piston 6 et une culasse arrière 12 portant une bougie 36 d'allumage du mélange dans la chambre 1 pour la mise à feu du mélange, la propulsion du piston 5 et l'entraînement du clou introduit dans le guide-tampon 9. Incidemment, l'outil qui va maintenant être décrit comporte, dans la chambre 1, un ventilateur 13, avec son moteur 16, assurant une fonction de mélange et une fonction de refroidissement. La paroi de chambre comporte une partie antérieure 14 et une partie arrière 15 destinées à recouvrir la culasse 12.The tool that will now be described here is a nailer for driving nails in a support material against which the tool must be supported for allow the firing of a dose of a mixture of air and fuel previously introduced into a combustion chamber 1 of an internal combustion engine 2 of the tool ( figure 2 ). The engine comprises a cylinder 3 of axis 4 in which is slidably mounted a piston 5, with a head 6 and a rod 7 extending along the axis 4 and engaged in an axial bore 8 of a buffer guide 9 in which was introduced a nail to be driven by the piston rod 7 in the support material. The buffer guide 9 is slidably mounted in a support 10 fixed to the front of the cylinder 3.
The engine 2 further comprises a chamber wall 11 (also referred to as a chamber), of axis 4, slidably mounted on the cylinder 3 to form the combustion chamber 1 between the wall 11, the piston head 6 and a rear yoke 12 carrying a spark plug 36 for igniting the mixture in the chamber 1 for igniting the mixture, the propulsion of the piston 5 and the drive of the nail introduced into the buffer guide 9. Incidentally, the tool which will now be described comprises in the chamber 1, a fan 13, with its motor 16, providing a mixing function and a cooling function. The chamber wall has an anterior portion 14 and a rear portion 15 for covering the yoke 12.

A la périphérie du cylindre 3 ont été ménagées deux rainures latérales 17 diamétralement opposées et s'étendant axialement sur une distance sensiblement égale à la course de la paroi de chambre 11 entre sa position d'ouverture et sa position de fermeture de chambre. Chaque rainure 17 est ménagée entre deux nervures 51, 52 s'étendant à la surface du cylindre.At the periphery of the cylinder 3 have been formed two lateral grooves 17 diametrically opposed and extending axially over a distance substantially equal to the stroke of the chamber wall 11 between its open position and its chamber closing position. Each groove 17 is formed between two ribs 51, 52 extending on the surface of the cylinder.

La paroi de chambre 11, dans la partie antérieure 14, est agencée, de deux côtés latéraux diamétralement opposés et correspondant aux deux rainures du cylindre, pour recevoir une butée de chambre latérale 18 qui fait saillie vers l'intérieur dans la rainure 17 correspondante du cylindre se trouvant du même côté de l'axe 4 de l'outil (figure 5). Les deux butées de chambre 18 se présentent sous forme de blocs, ou patins, ici en matériau amortisseur. Plus précisément, chaque butée de chambre 18 est logée dans un carter 19 formé près du bord antérieur 20 de la partie antérieure 14 de la paroi de chambre 11. Le carter 19 est fixé au bas correspondant 25 (26) de la cage 21 par une goupille 50.The chamber wall 11, in the front part 14, is arranged on two diametrically opposite lateral sides and corresponding to the two grooves of the cylinder, to receive a lateral chamber stop 18 which projects inwards into the corresponding groove 17 of the cylinder lying the same side of the axis 4 of the tool ( figure 5 ). The two chamber stops 18 are in the form of blocks, or pads, here of damping material. More specifically, each chamber stop 18 is housed in a casing 19 formed near the front edge 20 of the front portion 14 of the chamber wall 11. The casing 19 is fixed to the corresponding bottom 25 (26) of the cage 21 by a pin 50.

La paroi de chambre 11 est fixée à l'arrière d'une cage 21 de fermeture-ouverture de chambre fixée, à l'avant, à un étrier de cage intermédiaire 22. La cage 21 comporte ici deux paires 23, 24 de bras arrières latéraux pouvant se déplacer à la surface du cylindre 3, les deux bras 25, 26 de chaque paire étant fixés à l'arrière ici sur le carter 19 de réception de la butée de chambre 18 situé du même côté. Les deux bras arrière 25, 26 de chaque paire 23, 24 se rejoignent en deux avant-bras 27, 28 fixés, à l'avant, à l'étrier 22. L'étrier de cage 22 est monté mobile en translation sur le support 10 du guide-tampon. Il est donc solidaire de la cage 21 en translation aussi bien vers l'avant que vers l'arrière. Il n'est solidaire en translation du guide-tampon 9 que vers l'avant ou, inversement, le guide-tampon 9 n'est solidaire en translation de l'étrier 22 que vers l'arrière. Cette dernière solidarisation s'effectue ici par une jambe d'appui arrière 29 du guide-tampon 9. Plus précisément, l'étrier de cage 22 porte une molette 37 de réglage du dépassement de l'extrémité avant de la tige de piston 7 hors de l'extrémité avant du guide-tampon 9. Mais ce n'est pas l'objet de l'invention de la présente demande.The chamber wall 11 is attached to the rear of a chamber 21 closing-chamber opening fixed at the front to an intermediate cage stirrup 22. The cage 21 here comprises two pairs 23, 24 of rear arms lateral members being able to move on the surface of the cylinder 3, the two arms 25, 26 of each pair being fixed at the rear here on the housing 19 for receiving the chamber abutment 18 situated on the same side. The two rear arms 25, 26 of each pair 23, 24 are joined in two forearms 27, 28 fixed, at the front, to the yoke 22. The caliper 22 is mounted movable in translation on the support 10 of the buffer guide. It is therefore secured to the cage 21 in translation both forwardly and backwardly. It is integral in translation of the buffer guide 9 only towards the front or, conversely, the buffer guide 9 is integral in translation with the stirrup 22 only towards the rear. This latter connection is made here by a rear support leg 29 of the buffer guide 9. More specifically, the cage stirrup 22 carries a knob 37 for adjusting the protrusion of the front end of the piston rod 7 out of the front end of the buffer guide 9. But this is not the object of the invention of the present application.

La molette 37 est montée rotative entre un pont arrière 38 et un pont avant 39 de l'étrier de cage 22 servant de paliers pour un arbre de molette 31 (figure 2) monté dans ces paliers. La portion arrière de l'arbre de molette 31 sert de guide à un ressort 32 d'ouverture de la chambre et évite que ce ressort ne flambe.The wheel 37 is rotatably mounted between a rear axle 38 and a front axle 39 of the caliper 22 serving as bearings for a wheel shaft 31 (FIG. figure 2 ) mounted in these bearings. The rear portion of the wheel shaft 31 serves as a guide to a spring 32 for opening the chamber and prevents the spring from flaming.

La portion avant de l'arbre 31 de la molette 37 comporte, à son extrémité, un disque 30 de poussée du guide-tampon 9, disque dont le bord périphérique forme rebord 40 d'appui postérieur contre le pont avant 39 de l'étrier de cage 20. Pour coopérer avec le disque de poussée 30 de l'arbre de molette 31, le guide-tampon comporte la jambe d'appui 29 se terminant à l'arrière par un disque d'appui 41 destiné à recevoir la poussée du disque 30 de l'arbre de molette 31.The front portion of the shaft 31 of the wheel 37 has, at its end, a disk 30 for pushing the buffer guide 9, disk whose peripheral edge forms a flange 40 of posterior support against the front bridge 39 of the cage stirrup 20. To cooperate with the thrust disk 30 of the wheel shaft 31, the buffer guide comprises the support leg 29 ending at the rear by a support disc 41 intended to receive the thrust of the disc 30 of the wheel shaft 31.

Le ressort 32 est un ressort d'ouverture unique et central. Il est monté à l'arrière en appui dans un logement 33 de la partie avant du cylindre 3. A l'avant, il est en appui contre le pont arrière 38 de l'étrier de cage 22.The spring 32 is a single and central opening spring. It is mounted at the rear bearing in a housing 33 of the front part of the cylinder 3. At the front, it bears against the rear deck 38 of the cage stirrup 22.

Les deux butées de chambre 18 sont des butées uniques d'ouverture et de fermeture de chambre.The two chamber stops 18 are single stops for opening and closing of chamber.

Quand l'opérateur ouvre l'outil, en l'écartant du matériau support, le ressort 32 se détend, repousse l'étrier de cage 22 vers l'avant, la cage 21 tire la paroi de chambre 11, 14, 15 vers l'avant sur le cylindre 3 jusqu'à ce que les butées 18 viennent en butée d'ouverture contre le fond antérieur 34 des rainures 17 (figure2). Pour effectuer un tir, l'opérateur met l'outil en appui contre le matériau récepteur. Le guide-tampon 9 est repoussé vers l'arrière, sa jambe d'appui 29 repousse le disque de poussée 30 qui, en appui contre la partie antérieure de l'étrier 22, repousse l'étrier 22 vers l'arrière ; la cage 21 est également repoussée vers l'arrière en entraînant la paroi de chambre 11 également, jusqu'à ce que la partie arrière 15 de la paroi de chambre vienne recouvrir la culasse 12 et que les butées de chambre 18 viennent en butée de fermeture contre le fond postérieur 35 des rainures 17 (figure 4).When the operator opens the tool, away from the support material, the spring 32 relaxes, pushes the cage stirrup 22 forward, the cage 21 pulls the chamber wall 11, 14, 15 towards the front on the cylinder 3 until the abutments 18 come into abutting abutment against the anterior bottom 34 of the grooves 17 ( figure2 ). To make a shot, the operator puts the tool in contact with the receiving material. The buffer guide 9 is pushed back, its support leg 29 pushes the thrust disc 30 which, bearing against the front part of the stirrup 22, pushes the stirrup 22 rearward; the cage 21 is also pushed backwards by driving the chamber wall 11 as well, until the rear part 15 of the chamber wall comes to cover the cylinder head 12 and the chamber abutments 18 come into closure abutment against the posterior bottom 35 of the grooves 17 ( figure 4 ).

La figure 5 représente une première forme de réalisation de la butée de chambre et de son chemin de coulissement qui est une rainure formée à la surface du cylindre, dans laquelle est le patin de butée est monté coulissant.
La figure 6 représente une variante de réalisation, pour ainsi dire inversée. C'est dans le patin de butée 55 qui comporte une rainure, ou gorge 53, dans laquelle s'étend une barrette 54 formée à la surface du cylindre. Les autres éléments sont identiques et portent les mêmes références.The figure 5 represents a first embodiment of the chamber abutment and its sliding path which is a groove formed in the cylinder surface, in which is the thrust pad is slidably mounted.
The figure 6 represents an alternative embodiment, almost inverted. It is in the stop shoe 55 which has a groove, or groove 53, in which extends a bar 54 formed on the surface of the cylinder. The other elements are identical and bear the same references.

Claims (8)

  1. Fastening tool with an internal combustion engine (2) for driving fastening elements into a support material, comprising a cylinder (3), in which a propulsion piston (5) is slideably mounted, a combustion chamber (1, 11) arranged to be supplied with fuel, a rear cylinder head (12) bearing a means (36) for igniting the fuel in the chamber (1) after its closure against the cylinder head (12) and after the closure of the tool, a translationally moveable plug guide (9) intended to receive a fastening element and the rod (7) of the piston (5), and a cage (21) coupled in translation, at the rear, to the chamber (11) and, at the front, to the plug guide (9), return means being provided in order, upon opening of the tool, to open the chamber (11) while driving the plug guide (9) forwards, opening and closing stop means also being provided for the chamber (11), the tool additionally comprising, on each side of the tool, a single opening and closing lateral chamber stop pad (18, 55) secured to the chamber (11) and mounted in a translationally moveable manner with respect to the cylinder (3), characterized in that it comprises
    - a single central spring (32) for opening the chamber (11), and in that,
    - on each side of the tool, the pad is arranged to slide on a path (17; 54) formed on the corresponding side of the cylinder (3).
  2. Fastening tool according to Claim 1, in which the opening spring (32) is mounted in rear abutment against the cylinder (3, 33) and in front abutment against an intermediate yoke (22) to which the cage (21) is fixed.
  3. Fastening tool according to either of Claims 1 and 2, in which a guide (31) for the opening spring (32) is provided.
  4. Fastening tool according to Claim 3, in which the guide (31) of the spring (32) is a shaft mounted in front (39) and rear (38) bridges of the cage yoke (22).
  5. Tool according to Claim 4, in which the front portion of the shaft (31) comprises a thrust disc (30) arranged to cooperate with a bearing leg (29) of the plug guide (9).
  6. Fastening tool according to Claim 1, in which the sliding path is a groove formed at the surface of the cylinder and the pad (18) is engaged in the groove (17).
  7. Fastening tool according to Claim 1, in which the sliding path is a bar (54) attached to the cylinder and in which a groove (53) for receiving the bar (54) is formed in the pad (55).
  8. Fastening tool according to one of the preceding claims, in which the stop pad (18, 55) is made of damping material.
EP10194548.3A 2009-12-11 2010-12-10 Combustion-powered fastener-driving tool with chamber opening and closing stop Not-in-force EP2332695B1 (en)

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FR0958904A FR2953752B1 (en) 2009-12-11 2009-12-11 INTERNAL COMBUSTION ENGINE FIXING TOOL WITH SINGLE CHAMBER OPENING AND CLOSING

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EP2332695A1 EP2332695A1 (en) 2011-06-15
EP2332695B1 true EP2332695B1 (en) 2015-10-14

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EP (1) EP2332695B1 (en)
JP (1) JP5684554B2 (en)
CN (1) CN102092031A (en)
AU (1) AU2010246410B2 (en)
CA (1) CA2725022C (en)
ES (1) ES2558333T3 (en)
FR (1) FR2953752B1 (en)
NZ (4) NZ589599A (en)
TW (1) TW201139073A (en)

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NZ619852A (en) 2015-08-28
AU2010246410B2 (en) 2013-05-09
NZ600776A (en) 2014-01-31
AU2010246410A1 (en) 2011-06-30
US20110139848A1 (en) 2011-06-16
TW201139073A (en) 2011-11-16
JP5684554B2 (en) 2015-03-11
US8800681B2 (en) 2014-08-12
CA2725022A1 (en) 2011-06-11
FR2953752A1 (en) 2011-06-17
NZ590084A (en) 2013-08-30
CA2725022C (en) 2014-06-10
EP2332695A1 (en) 2011-06-15
CN102092031A (en) 2011-06-15
ES2558333T3 (en) 2016-02-03
FR2953752B1 (en) 2012-01-20
JP2011121170A (en) 2011-06-23
NZ589599A (en) 2012-08-31

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