EP3195984A1 - Gasfixierungswerkzeug - Google Patents

Gasfixierungswerkzeug Download PDF

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Publication number
EP3195984A1
EP3195984A1 EP16203934.1A EP16203934A EP3195984A1 EP 3195984 A1 EP3195984 A1 EP 3195984A1 EP 16203934 A EP16203934 A EP 16203934A EP 3195984 A1 EP3195984 A1 EP 3195984A1
Authority
EP
European Patent Office
Prior art keywords
trigger
tool
chamber
actuating
safety
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
EP16203934.1A
Other languages
English (en)
French (fr)
Other versions
EP3195984B1 (de
Inventor
Alain Vettoretti
Patrick Herelier
Frédéric Nayrac
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of EP3195984A1 publication Critical patent/EP3195984A1/de
Application granted granted Critical
Publication of EP3195984B1 publication Critical patent/EP3195984B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25C1/008—Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/14—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil
    • B25C1/143—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge acting on an intermediate plunger or anvil trigger operated
    • 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 gas fastening tool.
  • the state of the art includes the documents EP-B1-123 717 , EP-B1-1 243 383 and EP-B1-2 087 220 .
  • Sealing or fixing tools are tools comprising an internal combustion engine operating by firing a fuel-air mixture in a combustion chamber, the fuel being injected into the chamber by a device injection from a fuel cartridge. Such tools are intended to drive fasteners in support materials (such as wood, concrete or steel) to fix parts. Gas tools are now widespread and can be used to install fasteners such as staple, nail, point, pin, etc.
  • fuel for an internal combustion engine there may be mentioned for example gasoline, alcohol, in liquid form and / or gas.
  • such a tool is portable and comprises a housing in which is mounted the propulsion internal combustion engine of a driving piston of a fastener.
  • a tool may also include a battery power supply and a handle, handling and shooting on which is mounted a trigger gun.
  • a firing cycle includes several steps such as dispensing a quantity of fuel through the cartridge, admitting the fuel into the chamber, mixing the fuel with air in the chamber, igniting and combusting the fuel. mixing for driving the piston, and evacuation of combustion gases from the chamber.
  • a combustion chamber comprises a gas inlet valve.
  • This valve has a body movable between a first closed position and a second open position of a gas inlet.
  • the first steps of a firing cycle are caused by the support of the tool on the support material in which a fastener must be anchored.
  • This support causes the injection of fuel into the combustion chamber through the intake valve.
  • the user of the tool must then manually press the trigger of the tool to close the inlet valve and cause a spark in the chamber, resulting in ignition of the air-fuel mixture in the chamber.
  • the ignition of this mixture must intervene in a definite time. If the ignition is too early because the user pressed the trigger too early (during the support of the tool on the support material for example), the mixture of air and fuel may not be optimum and poor combustion of this mixture could occur in the chamber. If the ignition is too late because the user has pressed too late on the trigger (a few seconds after the support of the tool on the support material), the mixture of air and fuel injected into the chamber may be partly discharged into the atmosphere and therefore not be in sufficient quantity for its ignition to take place.
  • the present invention provides a simple, effective and economical solution to this problem.
  • the invention thus ensures locking of the trigger in its first rest position until the actuating member has reached its second position. It is thus understood that the user will not be able to actuate the trigger until the tool is placed in abutment on the support material, and will not be able to actuate it either while the actuating member is in the process of moving between his first and second positions. Only when the actuating member is in its second position can the trigger be actuated, thereby ensuring that the air-fuel mixture injected into the chamber will be optimum for its ignition. This is made possible by the safety member which cooperates with the actuating member and the trigger.
  • the tool 10 shown on the figure 1 comprises a housing 12 in which there is an internal combustion engine 14, with at least one combustion chamber for containing a mixture of air and fuel whose firing causes the propulsion of a piston intended to drive an element fastener extracted from a feed magazine 16, the fastener being adapted to anchor in a support material, at the exit of a guide-tip 18 extending at the front of the housing 12.
  • the housing 12 of the tool has an axis 20, along which the driving piston moves and in the guide-tip 18, the fastening elements.
  • the tool 10 comprises a handle 22 for gripping and handling the tool. It extends substantially perpendicular to the axis 20, slightly inclined to it according to the application of the tool and the ergonomics during use.
  • the handle 22 is also used for shooting, by a trigger or trigger 23 mounted on it.
  • the handle 22 defines a rear portion 12b of the housing 12 and the feed magazine 16 is housed in a front portion 12a of the housing, which extends substantially parallel to the handle 22, that is to say substantially perpendicular to the housing.
  • axis 20 or slightly inclined with respect to this axis.
  • the housing 12 further comprises an upper portion 12c extending along the axis 20 and connecting the upper ends of the front portions 12a and 12b rear housing, and a lower portion 12d extending parallel to the axis 20 and connecting the lower ends of the front portions 12a and rear 12b of the housing
  • the figure 2 represents a portion of the housing 12 of the tool and more particularly one of the shells of this housing.
  • the housing 12 is formed of at least two assembled shells, one of which is visible in figure 2 and defines one half of the rear portion 12b and thus of the handle 22 of the tool, one half of the front portion 12a, and half of the upper 12c and lower 12d portions of the housing.
  • the shell comprises a plurality of housings and arrangements for mounting internal elements of the tool, which are visible in their mounting position to the figure 3 .
  • the supply magazine 16 is seen as fixing elements, which is intended to be housed in the front portion 12a of the casing 12.
  • the casings 24, 26 defining the heat engine are also seen, and more particularly a chamber precombustion device 28, a combustion chamber 30, and a working chamber 32 in which the aforementioned piston is slidably mounted.
  • the housing 24 defining the chamber 28 is intended to be housed in the handle 22, that is to say in the rear portion 12b of the housing.
  • the housing 26 defines the combustion chamber 30 and the working chamber 32 and is intended to extend into the upper portion 12c of the housing.
  • the magazine 16 and the casing 24 are substantially parallel to each other and perpendicular to the casing 26 which extends between the magazine 16 and the casing 24.
  • the magazine 16 has an elongated shape and delivers the fastening elements by its upper longitudinal end connected to the tip guide 18.
  • the casing 24 has an elongate, substantially cylindrical shape and extends substantially over the entire longitudinal dimension of the handle 22.
  • the casing 26 has an elongate shape and comprises a rear end, defining the chamber 30 and connected to the upper end of the casing 24, and a front end connected to the tip guide 18.
  • the tip guide 18 is provided a support member 34 intended to be supported on the support material.
  • this support causes the distribution of a predetermined quantity of fuel to the precombustion chamber 28 and is therefore necessary to be able to perform a shot that is to say a projection a fastener.
  • the fuel supply of the pre-combustion chamber 28 is effected by means of an injection device 36 from a cartridge 38 of combustible gas.
  • the cartridge 38 and a portion (front) of the injection device 36 are housed in the front portion 12a of the housing 12, and the remainder of the device 36 extends between the cartridge and the chamber 28, in the lower portion 12d of the housing .
  • the fuel is in the liquid state in the cartridge 38 and must be evaporated, the fuel gas being intended to be mixed with air before being burned in the chambers 28, 30.
  • the injection device 36 of a gas fixation tool generally allows both the evaporation of the fuel, its mixing with air, and the injection of this mixture into the chamber 28.
  • a valve 40 for calibrating an amount of liquid fuel is interposed between the liquid fuel cartridge 38 and an evaporator block 42.
  • a filter may be disposed in a housing or bore provided in the block 42.
  • a predetermined quantity of liquid fuel is discharged from the cartridge 38 through the valve 40 in the block 42, passing through the filter, and arrives in an evaporation cavity.
  • Block 42 is made of a heat conducting material, such as metal. The liquid fuel flowing through the filter is at least partially converted to gaseous fuel by the heat input of the ambient medium, which transmits calories to the evaporator block 42.
  • the at least partially vaporized fuel continues to circulate in the block 42, and absorbs additional heat from the environment.
  • the downstream portion of the block 42 includes an evaporation line 48, acting as a distribution manifold, to the pre-combustion chamber 28 of the attachment tool.
  • the sizing parameters of the device 36, and in particular of the evaporation cavity and the pipe 48, such as the length, the diameter, the thickness, etc., are designed so that the fuel is completely converted to gas at the outlet of a downstream discharge port of the pipe 48.
  • the block 42 and / or the pipe 48 may optionally comprise one or more fins arranged at least on a of their surfaces.
  • the gaseous fuel Upon exiting the discharge port, the gaseous fuel can be directly injected into the pre-combustion chamber 28.
  • the gaseous fuel leaving the discharge port can supply one or more fuel and feed outlet nozzles.
  • the fuel gas can alternatively feed a jet pump 46 of the venturi type, into which ambient air is entrained in the jet pump 46, and mixed with the gaseous fuel injected by the nozzle or nozzles. , so as to form an air-fuel mixture for feeding the chamber 28.
  • the pipe 48 may be formed in one piece with a portion of the evaporator block 42.
  • the pipe 48 is generally S or L-shaped.
  • the evaporator block 42 comprises a bore in which is mounted and slidable, along the longitudinal axis X of the cartridge 38, an actuating element 50.
  • This actuating element 50 has a straight elongated shape and comprises a bore for example in the form of T or L.
  • This bore comprises a first axial portion which extends along the element 50 and opens at the lower end thereof, and a radial portion extending between the upper end of the axial portion and the periphery of the element. The outlet of this radial portion is located opposite the aforementioned filter of the evaporator block 42.
  • the element 50 is movable between two positions: a high position or rest represented at the figure 3 and a low or working position. In both cases, the aforementioned radial outlet of the bore is located opposite the filter of the evaporator block. Seals are provided between the element 50 and the bore in which it is mounted. The lower end of the element 50 is configured to cooperate by interlocking with a connecting end of the cartridge 38.
  • the displacement of the element 50 causes the release of a calibrated quantity of fuel from the cartridge 38.
  • This fuel in liquid form, circulates in the bore of the element 50 and passes through the filter of the evaporator block 42, which retains any impurities, before entering the evaporation cavity of the block in which is initiated the transformation of the liquid fuel into gaseous fuel.
  • the fuel circulates in line 48 to complete its evaporation and arrives in the gaseous state at the aforementioned nozzle. It is then sprayed into the jet pump and mixed with air which enters the pump by venturi effect, the air-fuel mixture is then injected into the chamber 28 of the engine.
  • the block 42 is located above the cartridge, the pipe 48 extends partly on one side of the cartridge, and the jet pump 46 has a substantially perpendicular orientation with respect to the longitudinal axis X of the cartridge or conduit 48.
  • the cartridge, block 42 and conduit 48 are accommodated in the front arm and the jet pump 46 extends into the lower portion 12d of the housing.
  • the heat engine of the tool comprises a pre-combustion chamber 28, a combustion chamber 30 and a working chamber 32 in which the driving piston of a fixing element is able to move under the effect of the explosion of the air-fuel mixture in the combustion chamber 30.
  • the precombustion chamber 28 initiates the combustion of the air-fuel mixture.
  • This chamber 28 comprises a cavity in which are mounted ignition means such as a candle.
  • the chambers 28, 30 are separated from each other by a valve 52 visible to figures 9 and 10 .
  • Precombustion of the mixture in the chamber 28 causes an increase in pressure in its cavity.
  • this pressure exceeds a certain threshold, the valve 52 opens and lets the fuel mixture through the chamber 30.
  • the mixture arrives in the chamber 30 with a relatively high pressure.
  • the flame from the chamber 28 reaches the chamber 30, the combustion at high pressure in the chamber 30 to improve the performance of the tool.
  • the combustion in the chamber 30 causes an increase in pressure in the chamber 30, which forces the piston to move in the working chamber 32.
  • the figure 4 represents a member 60 for actuating the injection device 36.
  • This member 60 is here intended to cooperate by bearing with the actuating element 50 of the device 36.
  • the member 60 has a general L shape and comprises two arms 60a, 60b connected together.
  • a first arm 60a of greater length, has a free end and an opposite end connected to the second arm 60b, of smaller length.
  • the ends of the arms 60a, 60b are connected together by a substantially cylindrical finger 62 defining a pivot axis Y of the member 60.
  • the pivot axis Y is substantially perpendicular to a plane passing through the arms 60a, 60b. As we see in figure 3 , the Y axis is perpendicular to the plane passing through the axes 20 and X.
  • the finger 62 has an elongate shape along the pivot axis Y and comprises at each of its longitudinal ends a cylindrical pin 64.
  • Each pin 64 is centered and guided in rotation in a cylindrical housing 66 complementary to a housing shell ( figure 2 ).
  • the member 60 is thus pivotally mounted directly in the housing 12
  • the free end of the arm 60a is intended to cooperate directly or via a suitable mechanism with the aforementioned support member 34.
  • the end of the arm 60b, opposite the finger 62, is intended to cooperate by bearing with the actuating element 50 of the device 36.
  • This end of the arm is here equipped with a roller 68 or a pad, possibly mounted rotary around an axis parallel to the pivot axis Y, on this end of the arm, and intended to cooperate by bearing with the actuating element 50.
  • the member 60 is mounted in the front portion of the housing, behind the magazine 16, between the injection device 30 and the housing 26 or the working chamber 32.
  • the member 60 is pivotally movable between a first rest position shown in FIGS. figures 3 , 11 a and 11b in which the arms 60a, 60b respectively extend substantially at 11h and at 2h, by analogy with the dial of a clock (the pivot axis Y of the member 60 representing the axis of rotation clock hands), to a second position shown in Figures 13a to 14b in which the arms extend respectively at 12 o'clock and at 3 o'clock.
  • the pivoting of the member 60 is here caused by the support of the tool 10, and more particularly of its support member 34, on the support material.
  • the member 60 When the tool is not applied via its support member 34 on the support material, the member 60 is in its first position.
  • the support of the tool on the support material causes the displacement of the support member 34 vis-à-vis the tip guide 18, which in turn causes the pivoting of the member 60 of its first to his second position.
  • the configuration of the member 60 and in particular the difference in length between the arms 60a, 60b makes it possible to benefit from a lever arm effect when the device 36 is actuated. That is to say that a simple support of the tool on the support material, the only weight of the tool can be sufficient to ensure the displacement of the support member 34 from its first to its second position, may be sufficient to actuate the fuel distribution by the device 36 due to the reduction of the forces carried by the member 60.
  • the forces are transmitted by the end of the arm 60b or the roller on the actuating element 50 which is moved from its upper position ( figures 3 , 11 a and 11 b) at its low position ( Figures 12a to 14b ).
  • the figure 5 represents a safety member 70 which makes it possible to lock the trigger 23 of the tool in a rest position as long as the tool is not resting on the support material.
  • This member 70 is here intended to cooperate with the actuating member 60 on the one hand and the trigger 23 on the other hand.
  • the member 70 has an elongate shape that extends substantially along the axis 20 of the tool. It is here housed in the upper portion 12c of the housing, just below the housing 26 and the working chamber 32.
  • the member 70 comprises a front lug 70a and a rear leg 70b.
  • the front tab 70a is substantially flat. Its free front end is intended to cooperate by bearing with the free end of the arm 60a of the member 60. This end is here equipped with a roller 72 or a pad, optionally rotatably mounted about an axis parallel to the pivot axis Y, on this end of the arm, and intended to cooperate by bearing with the member 60.
  • the tab 70a includes a through window 73 (in a direction parallel to the axis X contained in the plane passing through the axes 20 and X) substantially at its center in which is housed a return means such as a compression spring 74
  • the axis of the spring 74 is contained in the plane of the tab and is substantially parallel to the axis 20 and / or the axis of elongation of the member 70.
  • the tab 70a comprises, within the the window 73, a cylindrical pin 76 engaged in the spring 74 to maintain it and to guide its compression.
  • the compression spring 74 is free to deform in the window 73 of the tab 70a.
  • the tab 70a comprises, between the roller 72 and the spring 74, at the base of the pin 76, stop means in the axial direction (along the axis of elongation of the member 70), which are here formed by two transverse ribs 78 and coplanar respectively located on the upper and lower faces of the tab 70a.
  • the front portion of the tab 70a including the ribs 78 is intended to be located just behind the free end of the arm 60a of the member 60, and in front of parallel branches of a U-shaped wall 80 of the housing shell 12 visible to the figure 2 .
  • the tab 70a, and more particularly the portion of the tab located behind the ribs 78, is mounted between these branches and can slide in a direction parallel to the axis 20 between these branches.
  • the compression spring 74 is supported by its opposite free end to the pin 76 on the front faces of the branches, which may respectively comprise housing or arrangements for maintaining or guiding the spring during its compression.
  • the rear leg 70b of the member 70 has a substantially rectilinear shape and extends from the rear end of the tab 70a.
  • the leg 70b comprises at its rear end a flange 82 facing downwards and intended to cooperate by pressing or abutment with the trigger 23 to lock it in its rest position.
  • the member 70 is movable in translation between a first rest position shown in FIGS. figures 3 and 11 a to 12b in which the compression spring 74 holds the member 70 in this advanced position, to a second position shown in FIGS. Figures 13a to 14b wherein the spring is compressed and the member 70 is in a retracted position.
  • the displacement of the member 70 is here caused by the support of the tool, and more exactly by the pivoting of the member 60.
  • the member 60 When the member 60 is in its first position, the free end of its arm 60a is at a distance from the member 70 which remains in its position before resting ( Figures 11a and 11b ).
  • the support of the tool on the support material causes the pivoting of the member 60 from its first to its second position.
  • the member moves from its first position shown in FIGS. figures 11 a and 11b to an intermediate position represented in Figures 12a and 12b , in which the free end of the arm 60a of the member 60 is supported on (the roller) the member 70, which remains in its first rest position.
  • the member 60 then moves from its intermediate position to its position shown in FIGS. Figures 13a to 14b in which the free end of the arm 60a of the organ 60 is pressing on (the roller) the member 70 which has moved in translation to its second position in which the compression spring 74 is constrained.
  • the trigger 23 of the tool is better visible at the figure 6 .
  • the trigger 23 is pivotally mounted, here by its upper end, about an axis Z substantially perpendicular to the axis 20 and parallel to the axis Y.
  • axis Z substantially perpendicular to the axis 20 and parallel to the axis Y.
  • a surface 84 here before, support at least one finger of a user such as an index.
  • the trigger 23 also comprises at its upper end stop means for cooperating with the flange 82 of the member 70.
  • the trigger 23 comprises an upper lug 86 whose upper face 86a, here plane, is intended to cooperate by bearing or abutment with the lower free end of the flange 82.
  • the trigger 23 comprises meshing teeth 88, here via a pinion 90 shown in FIG. figure 7 , with a rack 92 ( figures 3 and 8a and following).
  • the trigger 23 comprises two series of teeth 88 which are arranged in parallel planes substantially perpendicular to the Z axis. Each series of teeth 88 forms a toothed sector, which extends around the Z axis. teeth are separated from each other by a recess 94 of the trigger 23. The teeth 88 are located at the rear end of the trigger at side walls of the trigger, and the recess 94 opens to the back between these walls.
  • the pinion 90 is rotatable about an axis V parallel to the axes Y and Z. It comprises two cylindrical pins 96 coaxial centering and rotational guide pinion, which are intended to be housed respectively in housing 96a form complementary to the case shells ( figure 2 ).
  • the pinion 90 comprises, between the pins 96, two or three annular rows of teeth. It comprises a first annular row of teeth 100a intended to be housed in the recess 94 of the trigger and to be able to move freely in this recess. It further comprises at least one annular row of teeth 100b intended to be meshing with the teeth 88 of the trigger 23. These teeth 100b may be situated on either side of the teeth 100a, the pinion thus comprising two annular rows of teeth 100b separated from each other by the teeth 100a. Alternatively, the teeth 100b can extend between the teeth 100a and have a greater width than the teeth 100a so that they protrude from both sides 100a teeth and can mesh with the teeth 88 of the trigger. As we see in the figure 7 , the teeth 100a have a radial dimension, vis-à-vis the V axis, which is greater than that of the teeth 100b.
  • FIGS. 8a and 8b show the rack 92 and the figures 9 and 10 show its integration in tool 10.
  • the rack 92 is formed by a longitudinal element such as a slider whose longitudinal end portion, here upper, comprises rack teeth 93. These rack teeth 93 are intended to cooperate with the teeth 100a of the pinion 90, as illustrated at figure 10 . In the example shown, the teeth 93 extend over approximately 20 to 40% of the length of the longitudinal member, from its upper longitudinal end.
  • the rack 92 here has in cross section a substantially T-shaped and comprises two lateral coplanar longitudinal edges 97 which cooperate by sliding with longitudinal edges 98 with a substantially L-shaped section of the housing 24.
  • the flanges 98 may be formed in one piece with the housing 24.
  • the flanges 98 form a slideway inside which can slide along the longitudinal axis of the housing 24 and the chamber 28, the rack 92.
  • the rack 92 is guided in translation vis-à-vis the housing 24 by the flanges 98.
  • the rack 92 is movable between a first rest position, here high, and a second position, low. It is biased in its first position by elastic return means, such as compression springs 101 ( figure 10 ).
  • These springs 101 are here parallel to the rack 92 and mounted between the lower end of the rack and an element of the tool.
  • the springs 101 can be held in position and guided by cylindrical rods 102 fixedly mounted on the aforementioned element of the tool and slidably engaged in corresponding openings 104 of the rack.
  • the openings 104 are defined by a piece 106 attached and fixed to the lower end of the rack 92. This piece 106 here has a general inverted T shape whose central bar extends along the rack and whose ends of the lateral branches define the openings 104.
  • the rack 92 comprises at its lower longitudinal end a tongue 107 which is oriented substantially perpendicular to the axis of elongation of the rack and the side of the housing 24.
  • the tongue 107 is here formed in one piece with the T-piece This tongue 107 passes through a window of the casing 24 and can slide in this window during the movements of the rack 92.
  • This chamber 28 has a cylindrical shape. It comprises at its lower longitudinal end an intake valve 108 comprising a fixed body 108a and a movable body 108b, the cooperation of the fixed body with the movable body for sealingly closing a fuel inlet orifice 110 delivered by the device 36.
  • the chamber 28 comprises at its upper longitudinal end an evacuation valve 112 comprising a fixed body (not visible) and a movable body 112b, the cooperation of the fixed body with the movable body making it possible to seal an orifice ( not visible) for evacuating the combustion gases from the chambers 28, 30.
  • the movable bodies 108b, 112b of the valves are connected together by a control rod 114 which carries the said valve 52, at a distance from the moving bodies.
  • the movable body 112b has a piston shape and carries a seal 116 at its periphery for cooperating with a peripheral edge of the discharge port.
  • the movable body 108b has a hollow cylindrical shape and carries a seal 118 at its periphery for cooperating with a peripheral edge of the chamber 28.
  • the fixed body 108a is intended to be engaged in the lower end of the movable body 108b and has a complementary shape, here cylindrical, of the internal bore of the movable body 108b.
  • This fixed body 108a carries a seal 120 at its periphery for cooperating with the inner cylindrical surface of the movable body 108b.
  • the movable body 108b is connected to the lower end of the rod 114 via two arms 122 extending upwards, in the extension of the body mobile. These arms 122 are here diametrically opposed with respect to the longitudinal axis of the chamber 28 and the housing 24.
  • the movable body 108b of the inlet valve 108 comprises an outer annular groove 124 in which the tongue 107 of the rack 92 is engaged, as can be seen in FIG. figure 10 . It is therefore understood that the translational movement of the rack 92 along the housing 24 will result in a displacement of the movable body 108b (as well as the rod 114, the valve 52, and the movable body 112b) in the housing 24
  • the rack 92 is moved downward from its first to its second position, the movable bodies and the valve 52 move downwardly, until the movable bodies 108b, 112b cooperate with the fixed bodies of the valves. view of the sealing of the inlet and outlet ports, respectively.
  • the valve 52 for its part cooperates with an annular seat 124 defining a fluidic communication orifice between the chambers 28, 30. This orifice forms an inlet for the air-fuel mixture in the chamber 30.
  • FIGS 11a and 11b represent tool 10 at rest.
  • the various members and other parts described in the foregoing are in their respective positions of rest or first positions.
  • the Figures 12a and 12b represent the tool 10 when it begins to support it, through its support member 34, on the support material.
  • the various members and parts described in the foregoing are in their first positions with the exception of the support member 34 and the actuating member 60 which are in an intermediate position. in which the free end of the arm 60a of the member 60 bears on the roller 72 or the front end of the member 70, and the roller 68 or the end of the arm 60b bears against the element actuation 50 of the injection device 36.
  • the member 70 is always in its first position of locking the trigger 23, which can not be brought into its second position.
  • FIGS 13a and 13b represent the tool 10 after bearing the tool on the support material, the member 60 having traveled its entire stroke and being in its second position in which it has moved on the one hand the member 70 in translation to the rear of the tool, and secondly the actuating element 50 downwards.
  • the actuation of the element 50 causes the release of a predetermined quantity of fuel which is mixed with air and injected into the pre-combustion chamber 28 through its inlet orifice 110, the valve 108 being open (the body mobile 108b being in the up position).
  • the Figures 13a and 13b represent the tool 10 after actuation of the trigger 23 by the user, the latter having been moved from its first position to its second position.
  • the pivoting of the trigger about its axis causes a rotation of the pinion 90 about its axis (in the clockwise direction in the drawings), which in turn causes a translation of the rack 92 (here to the low).
  • the movement of the rack causes a displacement of the tongue 107 and results in a downward movement of the movable body 108b of the valve, which closes by cooperation with its fixed body 108a.
  • the movement of the rack 92 may further cause the generation of a spark in the pre-combustion chamber 28, for the ignition of the air-fuel mixture contained in this chamber.
  • the various members and parts of the tool 110 of this variant are similar to those of the tool 10, with the exception of the actuating member 160, the safety member 170, the trigger 123, and of the longitudinal element 192, which are described in the following.
  • the actuating member 160 of the injection device differs from that described in the preceding 60 in that it comprises a third arm 160c.
  • This third arm 160c extends rearwardly and upwardly from the middle of the arm 160a intended to cooperate (directly or indirectly) with the support member (not visible).
  • the arms 160a, 160c thus substantially form a Y.
  • the free end of the arm 160c is fork-shaped 161 with two lateral branches, whose upper free ends are folded here forwards and / or the free end of the arm 160a.
  • This member 160 is here intended to cooperate by bearing with the actuating element of the injection device, as described in the foregoing.
  • the free end of the arm 160a is intended to cooperate only (directly or via a suitable mechanism) with the support member of the tool. This end is not intended to cooperate with the member 170. It is the free end or fork 161 of the arm 160c, which is intended to cooperate by bearing or abutment with the member 170.
  • the member 160 is pivotally movable between a first rest position shown in FIGS. Figures 15a and 15b in which the arms 160a, 160c, 160b extend respectively substantially at 11 h, 1 h and 2 h, by analogy with the dial of a clock, to a second position shown in FIGS. Figures 16a to 18b in which the arms extend respectively at 12h, 2h and 3h.
  • the pivoting of the member 160 is here caused by the support of the tool 110, and more particularly of its support member, on the support material.
  • the member 160 When the tool is not applied via its support member on the support material, the member 160 is in its first position.
  • the support of the tool on the support material causes the displacement of the support member vis-à-vis the tip guide, which in turn causes the pivoting of the member 160 from its first to its second position.
  • the safety member 170 which makes it possible to lock the trigger 123 in its rest position, is here intended to cooperate with the actuating member 160, the trigger 123, as well as the longitudinal element 192.
  • the member 170 has an elongate shape and is pivotally mounted about an axis S substantially parallel to the pivot axis Y of the member 160.
  • the member 170 comprises two lateral pins 171 coaxial with near its front end, which define the axis S. They are intended to be rotatably mounted in housings of complementary shape of the housing shells.
  • the portion of the member 170 which extends in front of the axis S has a shorter length than that which extends behind this axis S in the example shown.
  • the front portion of the member 170 passes between the branches of the fork 161 and carries at its free end before a transverse finger 173 (substantially parallel to the axis S), which is able to bear and to cooperate with the branches and their folded ends of the fork 161.
  • a transverse finger 173 substantially parallel to the axis S
  • the member 170 is held and wedged in a first predetermined angular position around the axis S, by pressing the finger 173 on the branches and the folded ends of the branches.
  • the member 170 is biased in this angular position of rest by elastic return means, which here comprise a spring 174 mounted around the axis S and bearing respectively on the member 170 and the housing of the tool.
  • the rear portion of the member 170 (behind the pins 171) comprises at its rear free end a bearing finger 175 on the longitudinal member 192. At a distance from the axis S and this finger 175, the rear portion of the member 170 comprises a through window 177 (in a direction parallel to the axis S), which is traversed by a physical axis 179 carried by the trigger 123.
  • the window 177 has an elongate or oblong shape so that the physical axis 179 is housed with clearance in this window ( figure 15b ). This clearance allows the shaft 179 to move, substantially forwards backwards and forwards, vis-à-vis the body 170.
  • the member 170 is pivotally movable between its first rest position shown in FIGS. Figures 15a to 16b in which his or her front finger 173 is trapped or able to be trapped in the fork 161, and its rear finger 175 is at a distance from the upper end of the longitudinal member 192, to a second position shown in FIGS. Figures 18a and 18b in which his front finger 173 is released from the fork 161, and his rear finger 175 bears on the upper end of the longitudinal member 192 and has moved the latter down.
  • the angular displacement of the member 170 between these two positions is for example less than 10 or 20 °.
  • FIGS. 17a and 17b represent an intermediate position of the member 170 in which its front finger 173 is able to be released from the fork 161, and its rear finger 175 bears on the upper end of the longitudinal member 192 but has not yet solicited this last down
  • the displacement of the member 170 is here caused by the actuation of the trigger 123, which is made possible by the release of the member 170 by the member 160.
  • the trigger 123 of the tool 110 is pivotally mounted, here by its upper end, about an axis Z substantially parallel to the axes Y and S. Typically, it comprises a surface 184, here before, support of at least one finger of a user such as an index.
  • the trigger 123 also comprises at its upper and rear end coaxial lateral cylindrical pins 125 which are rotatably mounted in housings of complementary shape of the housing shells.
  • the trigger 123 further carries the aforementioned axis 179 here at its upper end and before.
  • the user pulls the trigger 123 it can bring it from its first position to an intermediate position shown at Figures 17a and 17b wherein the member 170 is pivotally displaced until its finger bears on the upper end of the longitudinal member 192.
  • the axes S, Z and 179 are then substantially coplanar in the example shown.
  • the user can continue the pivoting of the trigger 123 by bringing it to its second position shown in FIGS. Figures 18a and 18b wherein the member 170 is pivotally displaced to its second position and has moved downwardly through the longitudinal member 192.
  • the axis 179 moves in the window 177 of the organ 170.
  • the longitudinal member 192 is in the form of a strip whose longitudinal end, here upper, comprises a bearing surface 193a of the finger 175 of the member 170.
  • This longitudinal member 192 may be formed by a single sheet cut and folded.
  • the element 192 is slidably mounted on the casing 124, along its longitudinal axis, this casing possibly comprising means for sliding, for example of the slide type, similar to those described with reference to the previous embodiment.
  • the element 192 is movable between a first rest position, here high, and a second position, low. It is biased in its first position by elastic return means, such as a compression spring 200.
  • the element 192 comprises at its lower longitudinal end at least one tongue 193b which is oriented substantially perpendicular to the axis of elongation of the element 192 and the side of the housing 124.
  • This tongue 193b passes through a window 195 of the housing 124 and can slide in this window during movement of the element 192. It is engaged in a groove or recess of the movable body 108b of the intake valve for the displacement of this body inside the pre-combustion chamber and the opening and closing of the inlet of this chamber.
  • the spring 200 urges the longitudinal member 192 in its rest position by resting on the movable body 108b.
  • the figures 15a and 18b illustrate the operation of the tool 110.
  • FIGS 15a and 15b represent tool 110 at rest.
  • the various members and other parts described in the foregoing are in their respective positions of rest or first positions.
  • FIGS 16a and 16b represent the tool 110 when it is supported on the support material.
  • the member 160 is in its second unlocked position of the member 170.
  • the Figures 17a and 17b represent the tool 110 when the user started to pull the trigger 123 and the Figures 18a and 18b represent the tool 110 at the end of actuation of the trigger 123.
  • the actuation of the trigger causes a pivoting of the member 170 about its axis S, and a downward movement of the longitudinal member 192 which drives with him the movable body 108b of the intake valve, as explained in the foregoing.
  • FIGS. 19a and 19b represent alternative embodiments of the actuating and safety members.
  • the actuating and safety devices of these figures are similar to those of Figures 15a to 18b .
  • the actuating member 260 of the figure 19a is different from 160 Figures 15a to 18b in that its fork is replaced by a simple branch 261 in L.
  • the safety member 270 of the figure 19a is different from that of 170 Figures 15a to 18b in that its front portion does not include a finger but a through window 271 (in a direction perpendicular to the axis S), and in which is slidably mounted the branch of the member 260 (sliding in a plane perpendicular to the axes S and Y).
  • the pivoting members 260, 270 are similar to those described with reference to the previous embodiment.
  • the window of the member 270 here has a length greater than that of the folded portion of the branch 261 of the member 260, so that the arm 260c of the member 260 can be completely out of the window 271 when the member 270 pivots between its first and second positions.
  • the actuating member 260 of the figure 19b is similar to that of the figure 19a .
  • the cooperation of the members 260, 270 ' is similar to that of the members 260, 270.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP16203934.1A 2016-01-20 2016-12-14 Gasfixierungswerkzeug Active EP3195984B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1650433A FR3046741B1 (fr) 2016-01-20 2016-01-20 Outil de fixation a gaz

Publications (2)

Publication Number Publication Date
EP3195984A1 true EP3195984A1 (de) 2017-07-26
EP3195984B1 EP3195984B1 (de) 2018-08-22

Family

ID=55486937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16203934.1A Active EP3195984B1 (de) 2016-01-20 2016-12-14 Gasfixierungswerkzeug

Country Status (5)

Country Link
US (1) US10882171B2 (de)
EP (1) EP3195984B1 (de)
AU (1) AU2016277633B2 (de)
CA (1) CA2951545C (de)
FR (1) FR3046741B1 (de)

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JP6720634B2 (ja) * 2016-03-29 2020-07-08 マックス株式会社 手持ち工具
US11179837B2 (en) 2017-12-01 2021-11-23 Illinois Tool Works Inc. Fastener-driving tool with multiple combustion chambers and usable with fuel canisters of varying lengths
US11491621B2 (en) * 2019-08-01 2022-11-08 Zhejiang Rongpeng Air Tools Co., Ltd. Safety rack regulating device for nailing guns

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EP1243383B1 (de) 2001-03-20 2009-05-13 Illinois Tool Works Inc. Brennraumsystem mit spulenförmiger Vorverbrennungskammer
EP2087220B1 (de) 2006-11-13 2011-10-26 Illinois Tool Works Inc. Brennstoffverdunstungssystem zur verdunstung von in brennkraftbetriebenen vorrichtungen zu verwendenden flüssigbrennstoffen
WO2015053873A1 (en) * 2013-10-09 2015-04-16 Illinois Tool Works Inc. Fastener-driving tool including a reversion trigger
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DE19950345C2 (de) * 1999-10-19 2003-06-05 Hilti Ag Verfahren und Vorrichtung zum Antrieb eines Kolbens eines brennkraftbetriebenen Arbeitsgeräts, insbesondere eines Setzgeräts für Befestigungselemente
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EP0123717B1 (de) 1983-05-02 1988-04-20 Signode Corporation Tragbares, gasbetätigtes Befestigungswerkzeug
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Also Published As

Publication number Publication date
CA2951545C (en) 2019-03-26
AU2016277633B2 (en) 2018-07-26
US20170203424A1 (en) 2017-07-20
AU2016277633A1 (en) 2017-08-03
CA2951545A1 (en) 2017-07-20
FR3046741A1 (fr) 2017-07-21
US10882171B2 (en) 2021-01-05
FR3046741B1 (fr) 2018-01-05
EP3195984B1 (de) 2018-08-22

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