EP2347864A1 - Pressure-temperature graph and fuel rod, fuel-transfer device and tool for manual attachment with pressure sensor - Google Patents

Pressure-temperature graph and fuel rod, fuel-transfer device and tool for manual attachment with pressure sensor Download PDF

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Publication number
EP2347864A1
EP2347864A1 EP11152078A EP11152078A EP2347864A1 EP 2347864 A1 EP2347864 A1 EP 2347864A1 EP 11152078 A EP11152078 A EP 11152078A EP 11152078 A EP11152078 A EP 11152078A EP 2347864 A1 EP2347864 A1 EP 2347864A1
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EP
European Patent Office
Prior art keywords
fuel
cartridge
pressure
tool
pressure sensor
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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.)
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Application number
EP11152078A
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German (de)
French (fr)
Inventor
Christian Ricordi
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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 EP2347864A1 publication Critical patent/EP2347864A1/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 field of the invention is that of hand tools with internal combustion engine, intended to drive fasteners in a support material under the action of the firing of a drive fuel in a combustion chamber of the internal combustion engine, the fuel having been transferred into the combustion chamber from a fuel cartridge housed in the tools.
  • Such tools include, for example, nailers, staplers.
  • such a cartridge has an inner bag to be filled with fuel.
  • a propellant that exerts pressure on the pocket and thus releases the fuel.
  • the pressure exerted by the propellant may be 4 atmospheres.
  • Above the liquid is essentially air at the pressure of 1 atmosphere.
  • the plaintiff who wanted to solve the problem of the level of filling realized that the more one filled the pocket of a cartridge, the more one increased the pressure exerted by the air on the pocket, the pressure of 1 atmosphere corresponding to an empty pocket.
  • the volume of air decreases, which increases its pressure.
  • the pressure exerted on the pocket can vary from (4 + 1) 5 atmospheres, empty pocket, to [4 + (1x4)] 8 atmospheres, full pocket, the pressure decreasing towards 5 atmospheres as the pocket is emptying of its drive fuel.
  • Mariotte according to which, by volume constant, the pressure and temperature of a fluid are in a ratio also constant.
  • the invention relates first of all to a fuel cartridge assembly, for driving fasteners in a hand tool s internal combustion engine, and at least one abacus, relating to a fuel, a plurality of curves representative of the pressure of said fuel as a function of its temperature and relating to the same plurality of filling rates of said fuel of the cartridge.
  • the knowledge of the fuel pressure in the cartridge and its temperature makes it possible to know the degree of filling of the cartridge.
  • the applicant also proposes a fuel cartridge for driving fasteners in a hand tool with internal combustion engine, characterized in that it comprises a pressure sensor for measuring the fuel pressure in the cartridge.
  • a device for transferring fuel from a fuel cartridge into the combustion chamber of an internal combustion engine hand tool, for driving fastening elements in a support material characterized by the it comprises a pressure sensor for measuring the fuel pressure.
  • a internal combustion engine hand-held attachment tool for driving in a fastener support material, comprising a housing for receiving a driving fuel cartridge, a combustion chamber for receiving fuel driving the cartridge, with means for igniting the fuel in the chamber, a temperature sensor on the tool and a device for transferring fuel from the cartridge into the combustion chamber connected to the cartridge housing by a passage fuel transmission device, characterized in that it comprises between the transfer device and the housing of the cartridge, on said passage, a pressure sensor for measuring the fuel pressure.
  • a hand-held attachment tool 10 with an internal combustion engine comprises, in addition to a battery, not visible in the figure, an ignition system comprising, among other elements, a switch, or a switch, head 14 and a trigger switch 16.
  • the fuel supply system cooperates with the ignition system so that fuel can flow into a combustion chamber C of the tool 10 for a certain period of time after the actuation of the fuel. head switch 14 and for the fuel to flow into the combustion chamber C for a certain time interval after actuation of the trip switch 16.
  • the head switch 14 is normally open and is arranged to be closed in a known manner by a mobile element 18 of a known type when a contact element of a probe of a known type bears against a support intended to to receive the fastener.
  • the movable element 18 closes the combustion chamber C, in which here a fan 22 of a known type can be actuated.
  • the head switch 14 is a photoelectric switch.
  • a temperature sensor 80 on the tool and, here, on its housing, or casing, 40, in the cartridge housing, to be disposed near the cartridge. In this case, it is a thermistor.
  • the trip switch 16 must also be closed when the head switch 14 is closed, so that the ignition system can ignite the fuel in the combustion chamber C.
  • a manual trigger 24 is provided to close the ignition trigger switch 16.
  • the fuel is here a hydrocarbon that comes out in the liquid state of a pressurized cartridge 30 of a known type.
  • the cartridge 30 has an outlet tip 32, which must be depressed vigorously to allow the fuel to flow out of the cartridge 30 through the outlet nozzle 32.
  • the tool 10 is arranged so that the outlet tip 32 is depressed when the cartridge 30 is inserted into the tool 10.
  • the tool 10 comprises the envelope 40, with a housing 29 in which the cartridge 30 is inserted.
  • the casing 40 has a cavity 46 whose shape makes it possible to house a fuel injector 60, here a solenoid valve.
  • the casing 40 comprises a network of passage ducts 42, 44 through which the fuel hydrocarbon exiting the cartridge 30 flows through the outlet nozzle 32.
  • the outlet nozzle 32 opens into the passage duct 42 when the cartridge 30 is inserted into the tool 10.
  • the passage duct 44 actually extends the passage duct 42 of the casing 40 into the injector 60.
  • the injector 60 comprises a retaining chamber 48 into which the passage conduit 44 opens, chamber 48 which terminates in a nozzle 50, closed or not by a needle.
  • the nozzle 50 communicates with the combustion chamber C.
  • the fuel supply system comprises the fuel injector 60 mounted in the cavity 46.
  • the fuel injector 60 is arranged to inject the fuel into the combustion chamber C for a predetermined period of time to thereby control the volume of fuel. injected fuel.
  • the time interval varies with the ambient temperature and the ambient pressure.
  • the cartridge 30 comprises a casing 31 of cylindrical shape in which there is a flexible bag 33, more or less filled with fuel 38, to which is sealed a sealing mechanism 34 in which is slidably mounted, against the action of a spring, the outlet end 32 which protrudes out of a bowl 35 crimped on the casing 31, at a bead 39.
  • the interior space of the casing 31 surrounding the pocket 33 is partially occupied by a propellant 36, which exerts a pressure on the bag 33, and in part substantially by air 37 which is above the propellant 36. Propellant vapors are also above the propellant 36.
  • the abacus of FIG. 7 has been drawn up which groups together a plurality of representative curves, each of the pressure in the pocket 33 as a function of the temperature, for respectively one plurality of fill rates, in this case five.
  • the first curve F1 from the top corresponds to a full pocket 33 ( figure 2 )
  • the other curves F2 - F5 corresponding to lower fillings and decreased by determined level
  • the last curve F5 from the bottom, corresponding to a pocket virtually empty of its fuel, that is to say almost empty ( figure 3 )
  • the sensor 80 supplies the temperature of the cartridge 30, the solenoid valve 60 and the connecting ducts.
  • the knowledge of the fuel pressure in the cartridge and of the temperature, thanks to the sensor 80, thus makes it possible, thanks to the chart F1 - F5, to know the filling ratio.
  • a pressure sensor 70 can be placed directly in the cartridge 30.
  • a pressure sensor 71 can also be placed directly in the injector 60 ( Figures 4B and 6 ).
  • a pressure sensor 72 in the hand tool 10, in the passage duct 42 connecting the cartridge 30 in its housing to the injector 60 (FIG. figure 4C ).
  • the sensor 70 of the cartridge 30 immersed in the propellant (liquid (36) and gas (37)) of the cartridge 38, it is associated with a radiofrequency chip 75 for extracting its signal.

Abstract

The assembly has a pressure sensor (70) for measuring pressure of fuel (38) in a fuel rod (30). A pressure-temperature graph includes curves representing pressure of the fuel in the fuel rod based on temperature, where the graph is relative to filling rate of the fuel in the fuel rod. The rod comprises a cylindrical envelope in which a flexible pocket is arranged. The pocket is filled with fuel for filling the fuel rod. A sealing mechanism is attached to the pocket. An independent claim is also included for a hand operated fixing tool comprising housing for receiving a fuel rod.

Description

Le domaine de l'invention est celui des outils à main à moteur à combustion interne, destinés à entraîner des éléments de fixation dans un matériau support sous l'action de la mise à feu d'un combustible d'entraînement dans une chambre de combustion du moteur à combustion interne, le combustible ayant été transféré dans la chambre de combustion depuis une cartouche de combustible logée dans les outils. Comme outils de ce type, on peut considérer par exemple des cloueurs, des agrafeuses.The field of the invention is that of hand tools with internal combustion engine, intended to drive fasteners in a support material under the action of the firing of a drive fuel in a combustion chamber of the internal combustion engine, the fuel having been transferred into the combustion chamber from a fuel cartridge housed in the tools. Such tools include, for example, nailers, staplers.

L'un des problèmes qui se posent avec de tels outils est celui de la connaissance du niveau de remplissage de la cartouche de combustible.One of the problems that arise with such tools is that of knowing the level of filling of the fuel cartridge.

Généralement, une telle cartouche comporte une poche intérieure destinée à être remplie de combustible. Pour éjecter le combustible hors de la poche, on ouvre la poche qui baigne en partie dans un liquide propulseur qui exerce une pression sur la poche et donc fait sortir le combustible. A titre d'exemple, la pression exercée par le liquide propulseur peut-être de 4 atmosphères. Au-dessus du liquide, se trouve essentiellement de l'air à la pression de 1 atmosphère.Generally, such a cartridge has an inner bag to be filled with fuel. To eject the fuel out of the pocket, it opens the pocket which partly bathes in a propellant that exerts pressure on the pocket and thus releases the fuel. For example, the pressure exerted by the propellant may be 4 atmospheres. Above the liquid is essentially air at the pressure of 1 atmosphere.

Eh bien, la demanderesse qui a voulu résoudre le problème du niveau de remplissage, a réalisé que plus on remplissait la poche d'une cartouche, plus on augmentais la pression exercée par l'air sur la poche, la pression de 1 atmosphère correspondant à une poche vide. Au fur et à mesure qu'on remplit la poche, le volume d'air diminue, ce qui fait augmenter sa pression. Ainsi, la pression exercée sur la poche peut varier de (4 + 1) 5 atmosphères, poche vide, à [4 +(1x4)] 8 atmosphères, poche pleine, la pression redescendant vers 5 atmosphères au fur et à mesure que la poche se vide de son combustible d'entraînement.Well, the plaintiff who wanted to solve the problem of the level of filling, realized that the more one filled the pocket of a cartridge, the more one increased the pressure exerted by the air on the pocket, the pressure of 1 atmosphere corresponding to an empty pocket. As the bag is filled, the volume of air decreases, which increases its pressure. Thus, the pressure exerted on the pocket can vary from (4 + 1) 5 atmospheres, empty pocket, to [4 + (1x4)] 8 atmospheres, full pocket, the pressure decreasing towards 5 atmospheres as the pocket is emptying of its drive fuel.

C'est dans ces conditions que la demanderesse a eu l'idée de son invention, suggérée encore par la loi de Mariotte selon laquelle, à volume constant, la pression et la température d'un fluide sont dans un rapport également constant.It is in these circumstances that the plaintiff had the idea of her invention, further suggested by the law of Mariotte according to which, by volume constant, the pressure and temperature of a fluid are in a ratio also constant.

Ainsi, l'invention concerne tout d'abord un
ensemble d'une cartouche de combustible, pour l'entraînement d'éléments de fixation dans un outil à main s moteur à combustion interne, et d'au moins un abaque, relatif à un combustible, d'une pluralité de courbes représentatives de la pression dudit combustible en fonction de sa température et relatives à une même pluralité de taux de remplissage dudit combustible de la cartouche.Thus, the invention relates first of all to a
fuel cartridge assembly, for driving fasteners in a hand tool s internal combustion engine, and at least one abacus, relating to a fuel, a plurality of curves representative of the pressure of said fuel as a function of its temperature and relating to the same plurality of filling rates of said fuel of the cartridge.

Ainsi, pour le combustible considéré, la connaissance de la pression de combustible dans la cartouche et de sa température permet de connaître le taux de remplissage de la cartouche.Thus, for the fuel in question, the knowledge of the fuel pressure in the cartridge and its temperature makes it possible to know the degree of filling of the cartridge.

On peut facilement proposer une série d'abaques relatifs à une série de différents combustibles pouvant remplir la cartouche.One can easily propose a series of charts relating to a series of different fuels that can fill the cartridge.

En liaison intime avec l'ensemble revendiqué ci-dessus, la demanderesse propose aussi une
cartouche de combustible pour l'entraînement d'éléments de fixation dans un outil à main à moteur à combustion interne, caractérisée par le fait qu'elle comporte un capteur de pression destiné à mesurer la pression de combustible dans la cartouche.In close connection with the set claimed above, the applicant also proposes a
fuel cartridge for driving fasteners in a hand tool with internal combustion engine, characterized in that it comprises a pressure sensor for measuring the fuel pressure in the cartridge.

En combinaison avec un abaque de l'invention et en connaissance de la température, on peut donc connaître immédiatement le taux de remplissage de à cartouche.In combination with an abacus of the invention and with knowledge of the temperature, it is therefore possible to immediately know the degree of filling of the cartridge.

Il est également proposé un dispositif de transfert de combustible d'une cartouche de combustible dans la chambre de combustion d'un outil à main à moteur à combustion interne, pour l'entraînement d'éléments de fixation dans un matériau support, caractérisé par le fait qu'il comporte un capteur de pression destiné à mesurer la pression de combustible.There is also provided a device for transferring fuel from a fuel cartridge into the combustion chamber of an internal combustion engine hand tool, for driving fastening elements in a support material, characterized by the it comprises a pressure sensor for measuring the fuel pressure.

Connaissant la pression dans le dispositif de transfert, et aussi sa température, on connait donc aussi la pression dans la cartouche et donc son taux de remplissage.Knowing the pressure in the transfer device, and also its temperature, so we also know the pressure in the cartridge and therefore its filling rate.

Comme dispositif de transfert, on peut considérer âne électrovanne, un injecteur piézoélectrique.As a transfer device, one can consider a solenoid valve, a piezoelectric injector.

Il est enfin aussi proposé, dans la présente demande, et dans le cadre de cet unique concept de détermination du taux de remplissage en combustible d'entraînement d'une cartouche de combustible par détermination de sa pression et de sa température, un
outil de fixation à main à moteur à combustion interne, pour F entraînement dans un matériau support d'éléments de fixation, comportant un logement de réception d'une cartouche de combustible d'entraînement, une chambre de combustion, destinée à recevoir du combustible d'entraînement de la cartouche, avec des moyens de mise à feu du combustible dans la chambre, un capteur de température sur l'outil et un dispositif de transfert du combustible de la cartouche dans la chambre de combustion relié au logement de cartouche par un passage de transmission de combustible, outil caractérisé par le fait qu'il comporte entre le dispositif de transfert et le logement de la cartouche, sur ledit passage, un capteur de pression destiné à mesurer la pression de combustible.Finally, it is also proposed in the present application, and in the context of this unique concept of determining the filling rate of fuel of a fuel cartridge by determining its pressure and temperature, a
internal combustion engine hand-held attachment tool for driving in a fastener support material, comprising a housing for receiving a driving fuel cartridge, a combustion chamber for receiving fuel driving the cartridge, with means for igniting the fuel in the chamber, a temperature sensor on the tool and a device for transferring fuel from the cartridge into the combustion chamber connected to the cartridge housing by a passage fuel transmission device, characterized in that it comprises between the transfer device and the housing of the cartridge, on said passage, a pressure sensor for measuring the fuel pressure.

Connaissant la pression de combustible entre la cartouche et le dispositif de transfert ainsi que la température, on connaît donc aussi la pression dans la cartouche et donc son taux de remplissage.Knowing the fuel pressure between the cartridge and the transfer device and the temperature, so also known pressure in the cartridge and therefore its filling rate.

L'invention sera mieux comprisse à l'aide de la description qui suit, en référence au dessin en annexe sur lequel

  • la figure 1 représente une vue en coupe longitudinale d'un outil de fixation à main à moteur à combustion interne, avec une cartouche de combustible ;
  • la figure 2 représente une vue en coupe d'une cartouche de combustible pleine ;
  • la figure 3 représente une vue en coupe de la cartouche de la figure 1, presque vide ;
  • les ligures 4A, 4B, 4C sont des représentations schématiques d'un ensemble d'une cartouche de combustible et d'une électrovanne de transfert du combustible de la cartouche dans la chambre de combustion d'un outil de fixation comme celui de la figure 1, avec un capteur de pression respectivement dans la cartouche, l'électrovanne et entre les deux ;
  • la figure 5 représente une vue en coupe de la cartouche des figures 2 et 3, avec un capteur de pression à l'intérieur de la cartouche ;
  • la figure 6 représente une vue d'une électrovanne, avec un capteur de pression intégré et
  • la figure 7 est un abaque, relatif à un combustible d'une cartouche, de courbes de pression p en fonction de la température θ pour une pluralité de taux de remplissage de la cartouche.
The invention will be better understood with the aid of the description which follows, with reference to the drawing in the appendix on which
  • the figure 1 is a longitudinal sectional view of an internal combustion engine hand-held attachment tool with a fuel cartridge;
  • the figure 2 represents a sectional view of a full fuel cartridge;
  • the figure 3 represents a sectional view of the cartridge of the figure 1 , almost empty ;
  • Ligurian 4 A, 4 B, 4 C are schematic representations of an assembly of a fuel cartridge and a fuel transfer valve of the cartridge into the combustion chamber of a fastening tool such as the figure 1 , with a pressure sensor respectively in the cartridge, the solenoid valve and between the two;
  • the figure 5 represents a sectional view of the cartridge of figures 2 and 3 , with a pressure sensor inside the cartridge;
  • the figure 6 represents a view of a solenoid valve, with an integrated pressure sensor and
  • the figure 7 is an abacus, relating to a fuel of a cartridge, of pressure curves p as a function of the temperature θ for a plurality of fill rates of the cartridge.

En référence à la figure 1, un outil de fixation à main 10 à moteur à combustion interne comporte, outre une batterie, non visible sur la figure, un système d'allumage comprenant, parmi d'autres éléments, un commutateur, ou un interrupteur, de tête 14 et un interrupteur de déclenchement 16. Le système d'alimentation en combustible coopère avec le système d'allumage pour que du combustible puisse s'écouler dans une chambre de combustion C de l'outil 10 pendant un certain intervalle de temps après l'actionnement de l'interrupteur de tête 14 et pour que le combustible s'écoule dans la chambre de combustion C pendant un certain intervalle de temps après l'actionnement de l'interrupteur de déclenchement 16.With reference to the figure 1 , a hand-held attachment tool 10 with an internal combustion engine comprises, in addition to a battery, not visible in the figure, an ignition system comprising, among other elements, a switch, or a switch, head 14 and a trigger switch 16. The fuel supply system cooperates with the ignition system so that fuel can flow into a combustion chamber C of the tool 10 for a certain period of time after the actuation of the fuel. head switch 14 and for the fuel to flow into the combustion chamber C for a certain time interval after actuation of the trip switch 16.

L'interrupteur de tête 14 est normalement ouvert et est agencé pour être fermé de façon connue par un élément mobile 18 d'un type connu lorsqu'un élément de contact d'un palpeur d'un type connu est en appui contre un support destiné à recevoir l'élément de fixation. Lorsque le palpeur est en appui, l'élément mobile 18 ferme la chambre de combustion C, dans laquelle ici un ventilateur 22 d'un type connu peut être actionné. De préférence, l'interrupteur de tête 14 est un interrupteur photoélectrique.The head switch 14 is normally open and is arranged to be closed in a known manner by a mobile element 18 of a known type when a contact element of a probe of a known type bears against a support intended to to receive the fastener. When the probe is in abutment, the movable element 18 closes the combustion chamber C, in which here a fan 22 of a known type can be actuated. Preferably, the head switch 14 is a photoelectric switch.

Il est prévu un capteur de température 80 sur l'outil et, ici, sur son boîtier, ou enveloppe, 40, dans le logement de cartouche, pour être disposé à proximité de la cartouche. En l'espèce, il s'agit d'une thermistance .There is provided a temperature sensor 80 on the tool and, here, on its housing, or casing, 40, in the cartridge housing, to be disposed near the cartridge. In this case, it is a thermistor.

L'interrupteur de déclenchement 16 doit aussi être fermé lorsque l'interrupteur de tête 14 est fermé, pour que le système d'allumage puisse mettre à feu le combustible dans la chambre de combustion C. Une gâchette manuelle 24 est prévue pour fermer l'interrupteur de déclenchement 16.The trip switch 16 must also be closed when the head switch 14 is closed, so that the ignition system can ignite the fuel in the combustion chamber C. A manual trigger 24 is provided to close the ignition trigger switch 16.

Dans l'outil 10, le combustible est ici un hydrocarbure qui sort à l'état liquide d'une cartouche pressurisée 30 d'un type connu. La cartouche 30 présente un embout de sortie 32, qui doit être enfoncé vigoureusement pour permettre l'écoulement du combustible hors de la cartouche 30 par l'embout de sortie 32.In the tool 10, the fuel is here a hydrocarbon that comes out in the liquid state of a pressurized cartridge 30 of a known type. The cartridge 30 has an outlet tip 32, which must be depressed vigorously to allow the fuel to flow out of the cartridge 30 through the outlet nozzle 32.

L'outil 10 est agencé pour que l'embout de sortie 32 soit enfoncé lorsque la cartouche 30 est insérée dans l'outil 10. Ainsi, l'outil 10 comporte l'enveloppe 40, avec un logement 29 dans lequel la cartouche 30 est insérée. L'enveloppe 40 présente une cavité 46, dont la forme permet d'y loger un injecteur de combustible 60, ici une électrovanne. L'enveloppe 40 comporte un réseau de conduits de passage 42, 44 par lesquels s'écoule l'hydrocarbure combustible sortant de la cartouche 30 par l'embout de sortie 32. L'embout de sortie 32 débouche dans le conduit de passage 42 lorsque la cartouche 30 est insérée dans l'outil 10. Le conduit de passage 44 prolonge en fait le conduit de passage 42 de l'enveloppe 40 dans injecteur 60.
L'injecteur 60 comporte une chambre de retenue 48, dans laquelle débouche le conduit de passage 44, chambre 48 qui se termine par une buse 50, obturée ou non par une aiguille. La buse 50 communique avec la chambre de combustion C.The tool 10 is arranged so that the outlet tip 32 is depressed when the cartridge 30 is inserted into the tool 10. Thus, the tool 10 comprises the envelope 40, with a housing 29 in which the cartridge 30 is inserted. The casing 40 has a cavity 46 whose shape makes it possible to house a fuel injector 60, here a solenoid valve. The casing 40 comprises a network of passage ducts 42, 44 through which the fuel hydrocarbon exiting the cartridge 30 flows through the outlet nozzle 32. The outlet nozzle 32 opens into the passage duct 42 when the cartridge 30 is inserted into the tool 10. The passage duct 44 actually extends the passage duct 42 of the casing 40 into the injector 60.
The injector 60 comprises a retaining chamber 48 into which the passage conduit 44 opens, chamber 48 which terminates in a nozzle 50, closed or not by a needle. The nozzle 50 communicates with the combustion chamber C.

Le système d'alimentation en combustible comprend l'injecteur de combustible 60 monté dans la cavité 46. L'injecteur de combustible 60 est agencé pour injecter le combustible dans la chambre de combustion C pendant un intervalle de temps prédéterminé pour contrôler ainsi le volume de combustible injecté. L'intervalle de temps varie avec la température ambiante et la pression ambiante.The fuel supply system comprises the fuel injector 60 mounted in the cavity 46. The fuel injector 60 is arranged to inject the fuel into the combustion chamber C for a predetermined period of time to thereby control the volume of fuel. injected fuel. The time interval varies with the ambient temperature and the ambient pressure.

En référence aux figures 2 et 3, la cartouche 30 comporte une enveloppe 31 de forme cylindrique dans laquelle se trouve une poche souple 33, plus ou moins remplie du combustible 38, à laquelle est scellé un mécanisme d'étanchéité 34 dans lequel est monté coulissant, contre l'action d'un ressort, l'embout de sortie 32 qui fait saillie hors d'une cuvette 35 sertie sur l'enveloppe 31, au niveau d'un bourrelet 39. L'espace intérieur de l'enveloppe 31 entourant la poche 33 est occupé en partie par un liquide propulseur 36, qui exerce une pression sur la poche 33, et en partie essentiellement par de l'air 37 qui se trouve au-dessus du propulseur 36. Des vapeurs de propulseur se trouvent également au-dessus du propulseur 36. Quand l'embout 32 est enfoncé dans son mécanisme d'étanchéité 34, le combustible 38, sous l'action de la pression du propulseur 36 ainsi que de l'air 37, s'écoule de la cartouche 30 dans l'électrovanne 60 par le conduit de passage 44. Quand la poche 33 se vide, l'espace qui l'entoure augmente et le propulseur liquide 36 passe en partie en phase gazeuse 36',With reference to figures 2 and 3 , the cartridge 30 comprises a casing 31 of cylindrical shape in which there is a flexible bag 33, more or less filled with fuel 38, to which is sealed a sealing mechanism 34 in which is slidably mounted, against the action of a spring, the outlet end 32 which protrudes out of a bowl 35 crimped on the casing 31, at a bead 39. The interior space of the casing 31 surrounding the pocket 33 is partially occupied by a propellant 36, which exerts a pressure on the bag 33, and in part substantially by air 37 which is above the propellant 36. Propellant vapors are also above the propellant 36. When the tip 32 is pressed into its sealing mechanism 34, the fuel 38, under the action of the pressure of the thruster 36 as well as air 37, flows from the cartridge 30 into the solenoid valve 60 through the passage duct 44. When the bag 33 empties, the space surrounding it increases and the liquid propellant 36 passes in part in the gas phase 36 ',

Pour le combustible se trouvant dans la poche 33 de la cartouche 30, on a dressé l'abaque de la ligure 7 qui regroupe une pluralité de courbes représentatives, chacune, de la pression dans la poche 33 en fonction de la température, pour respectivement une pluralité de taux de remplissage, en l'occurrence cinq .
La première courbe F1, du haut, correspond à une poche 33 pleine (figure 2), les autres courbes F2 - F5 correspondant à des remplissages inférieurs et diminués par palier déterminé, la dernière courbe F5, du bas, correspondant donc à une poche pratiquement vidée de son combustible, c'est-à-dire presque vide (figure 3),For the fuel in the pocket 33 of the cartridge 30, the abacus of FIG. 7 has been drawn up which groups together a plurality of representative curves, each of the pressure in the pocket 33 as a function of the temperature, for respectively one plurality of fill rates, in this case five.
The first curve F1, from the top, corresponds to a full pocket 33 ( figure 2 ), the other curves F2 - F5 corresponding to lower fillings and decreased by determined level, the last curve F5, from the bottom, corresponding to a pocket virtually empty of its fuel, that is to say almost empty ( figure 3 )

Le capteur 80 fournit la température de la cartouche 30, de l'électrovanne 60 et des conduits de liaison. La connaissance de la pression de combustible dans la cartouche et de la température, grâce au capteur 80, permet donc, grâce à l'abaque F1 - F5 de connaître le taux de remplissage.The sensor 80 supplies the temperature of the cartridge 30, the solenoid valve 60 and the connecting ducts. The knowledge of the fuel pressure in the cartridge and of the temperature, thanks to the sensor 80, thus makes it possible, thanks to the chart F1 - F5, to know the filling ratio.

Pour mesurer la pression de combustible dans la cartouche, plusieurs options sont possibles. En référence aux figures 4-6, on peut placer un capteur de pression 70 directement dans la cartouche 30. On peut aussi placer un capteur de pression 71 directement dans l'injecteur 60 (figures 4B et 6). On peut encore disposer un capteur de pression 72 dans l'outil à main 10, dans le conduit de passage 42 reliant la cartouche 30 dans son logement à l'injecteur 60 (figure 4C). Dans le cas du capteur 70 de la cartouche 30, immergé dans le propulseur (liquide (36) et gazeux (37)) de la cartouche 38, il est associé à une puce radioféquence 75 d'extraction de son signal.To measure the fuel pressure in the cartridge, several options are possible. With reference to Figures 4-6 a pressure sensor 70 can be placed directly in the cartridge 30. A pressure sensor 71 can also be placed directly in the injector 60 ( Figures 4B and 6 ). It is also possible to have a pressure sensor 72 in the hand tool 10, in the passage duct 42 connecting the cartridge 30 in its housing to the injector 60 (FIG. figure 4C ). In the case of the sensor 70 of the cartridge 30, immersed in the propellant (liquid (36) and gas (37)) of the cartridge 38, it is associated with a radiofrequency chip 75 for extracting its signal.

Claims (6)

Ensemble d'une cartouche de combustible (30), pour l'entraînement d'éléments de fixation dans un outil à main (10) à moteur à combustion interne, et d'au moins un abaque relatif à un combustible (38) d'une pluralité de courbes (F1 - F5) représentatives de la pression dudit combustible en fonction de sa température et relatives à une même pluralité de taux de remplissage dudit combustible de la cartouche (30).A fuel cartridge assembly (30) for driving fasteners in a hand tool (10) with an internal combustion engine, and at least one fuel-related abacus (38) for a plurality of curves (F 1 - F 5 ) representative of the pressure of said fuel as a function of its temperature and relating to the same plurality of filling rates of said fuel of the cartridge (30). Ensemble selon la revendication 1, comprenant une série d'abaques relatifs à une série de différents combustibles pouvant remplir la cartouche.An assembly according to claim 1 comprising a series of charts relating to a series of different fuels that can fill the cartridge. Cartouche de combustible (30) pour l'entraînement d'éléments de fixation dans un outil à main (10) à moteur à combustion interne, caractérisée par le fait qu'elle comporte un capteur de pression (70) destiné à mesurer la pression de combustible dans la cartouche (30).Fuel cartridge (30) for driving fastening elements in a hand tool (10) with an internal combustion engine, characterized by the fact that it comprises a pressure sensor (70) for measuring the pressure of fuel in the cartridge (30). Dispositif (60) de transfert du combustible d'une cartouche de combustible (30) dans la chambre de combustion (C) d'un outil à main (10) à moteur à combustion interne, pour l'entraînement d'éléments de fixation dans un matériau support, caractérisé par le fait qu'il comporte un capteur de pression (71) destiné à mesurer la pression de combustible.Device (60) for transferring fuel from a fuel cartridge (30) into the combustion chamber (C) of an internal combustion engine hand tool (10) for driving fasteners into a support material, characterized in that it comprises a pressure sensor (71) for measuring the fuel pressure. Dispositif de transfert de combustible selon la revendication 4 qui est une électrovanne (60).Fuel transfer device according to claim 4 which is a solenoid valve (60). Outil de fixation à main (10) à moteur à combustion interne, pour l'entraînement dans un matériau support d'éléments de fixation, comportant un logement (29) de réception d'une cartouche (30) de combustible d'entraînement (38), une chambre de combustion C, destinée à recevoir du combustible d'entraînement (38) de la cartouche (30), avec des moyens (16, 14, 18, 24) de mise à feu du combustible dans la chambre, un capteur de température (80) sur l'outil et un dispositif (60) de transfert du combustible de la cartouche (30) dans la chambre de combustion C relié au logement de cartouche (29) par un passage (42) de transmission de combustible, outil caractérisé par le fait qu'il comporte, entre le dispositif de transfert (60) et le logement (29) de la cartouche (30), sur ledit passage (42), un capteur de pression (72) destiné à mesurer la pression de combustible,An internal combustion engine hand-held attachment tool (10) for driving in a fastener carrier material having a housing (29) for receiving a driving fuel cartridge (30) (38) ), a combustion chamber C, for receiving driving fuel (38) of the cartridge (30), with means (16, 14, 18, 24) for firing the fuel in the chamber, a sensor a temperature (80) on the tool and a fuel transfer device (60) for the cartridge (30) in the combustion chamber C connected to the cartridge housing (29) by a fuel transmission passage (42), characterized in that it comprises, between the transfer device (60) and the housing (29) of the cartridge (30), on said passage (42), a pressure sensor (72) for measuring the pressure fuel,
EP11152078A 2010-01-26 2011-01-25 Pressure-temperature graph and fuel rod, fuel-transfer device and tool for manual attachment with pressure sensor Withdrawn EP2347864A1 (en)

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FR1050527A FR2955517B1 (en) 2010-01-26 2010-01-26 PRESSURE-TEMPERATURE ABATE AND FUEL CARTRIDGE, FUEL TRANSFER DEVICE, AND HAND FASTENING TOOL WITH PRESSURE SENSOR

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EP (1) EP2347864A1 (en)
JP (1) JP2011152637A (en)
CN (1) CN102135057A (en)
AU (1) AU2010257260A1 (en)
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FR2955517B1 (en) 2012-04-20
CA2728935C (en) 2016-06-28
AU2010257260A1 (en) 2011-08-11
JP2011152637A (en) 2011-08-11
FR2955517A1 (en) 2011-07-29
CN102135057A (en) 2011-07-27
CA2728935A1 (en) 2011-07-26
US20110180582A1 (en) 2011-07-28
TW201139063A (en) 2011-11-16

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