EP3398721A1 - Combined fixing tool - Google Patents

Abstract

Fastening tool (1) comprising a fastener guide nose (9) and a percussion blade of said fastening elements, characterized in that said fastening tool (1) is configured to pull a fastener member a first type and at least one fixing element of a second type having dimensional and / or geometric characteristics different from those of said first type fastening element.

Description

TECHNICAL AREA

An attachment tool configured to pull fasteners of a first type and fasteners of at least a second type having dimensional and / or geometric characteristics different from those of first type fasteners. .

STATE OF THE ART

The sealing or fastening tools are tools for driving a fastener (staple, nail, point, pin, etc.) into a support material (in particular wood, concrete or steel). For this, a moving blade hits a fastener (for example at the head in the case of a nail) present in a firing chamber to launch the latter so that it can be anchored in the material support. The blade is set in motion by a driving device using for example a thermal energy and / or electric and / or pneumatic.

In general, such a tool comprises a nose (also called guide-tip) and a shear block (also called connector) internally defining the firing chamber. The shear block is an integral part of a magazine mounted releasably support on the nose of the tool. The fasteners stored in the magazine are introduced one by one into the firing chamber through a feed window in the shear block.

In the case of a tool of the nailer type, a refill is generally in the form of a strip of nails, the nails being contiguous to each other and held in position by appropriate means such as adhesive strips.

Depending on the application, the nails have different characteristics, in particular as regards dimensions, geometry and mechanical properties.

For example, in connection with the geometry of a nail, the head may be in particular of round or D-shaped. The rod may be centered or off-center with respect to the head. The rod may be in particular smooth, notched, twisted.

By way of example, in connection with the mechanical properties, the nail can undergo various heat treatments (tempering, tempering, annealing) in the mass or at the surface, in particular with a view to increasing its mechanical properties (breaking strength, limit elastic, hardness).

It is also noted that depending on the nails, and especially according to the shape of the head, the band is more or less dense, and in other words the number of nails varies on a band of the same size.

In the traditional way, a fixing tool is associated with a type of nails. Indeed, depending on the type of nails used, several components of the tool have different designs. These components include the nose, the blade and the shear block.

• une percussion précise de la tête du clou par la lame, afin notamment d'éviter un double tir (projection simultanée de deux clous) et de limiter les forces de frottement;
• un guidage précis du clou dans la chambre de tir, afin que la trajectoire du clou en sortie de chambre soit sensiblement confondue avec la direction de la lame.

Indeed, whatever the type of nails, in order to repeatedly have a quality shot, several technical constraints must be respected, among which we can mention:

• a precise percussion of the head of the nail by the blade, in particular to avoid a double shot (simultaneous projection of two nails) and to limit the friction forces;
• precise guidance of the nail in the firing chamber, so that the path of the nail at the exit of the chamber is substantially coincident with the direction of the blade.

The object of the present invention is to provide in particular a fixing tool for drawing fasteners of different types, namely having particular dimensional and / or geometric characteristics.

SUMMARY OF THE INVENTION

According to a first aspect, the invention relates to a guide nose of fastening elements for a fastening tool, such as a nailer, characterized in that said nose is configured to pull a fastener of a first type and a fastener of at least a second type having dimensional and / or geometric characteristics different from those of said fastener of a first type, nose having distinct locations, in particular heads, said first and second type fasteners.

Such a nose makes it possible to accurately position the fasteners of the first type and of the second type with respect to a percussion blade in a firing chamber. Such positioning significantly limits the double firing (firing of two fasteners simultaneously) and the frictional forces induced on the fired fastener while optimizing firing accuracy.

• les caractéristiques géométriques et/ou dimensionnelles des têtes des éléments de fixation de premier type et second type sont différentes ;
• la position relative de la tige par rapport à la tête des éléments de fixation de premier type et second type est différente ;
• le nez délimite au moins en partie une chambre de tir et comporte :
  • une première zone d'appui apte à coopérer avec une tête dudit élément de fixation de premier type en vue de son positionnement avant un tir ;
  • une seconde zone d'appui distante de ladite première zone et apte à coopérer avec une tête dudit élément de fixation de second type en vue de son positionnement avant un tir ;
• le nez comprend une paroi étagée définissant lesdites première et seconde zones d'appui ;
• lesdites première et seconde zones d'appui sont alignées suivant un axe d'allongement de ladite paroi ;
• le nez comprend un rebord apte à s'engager dans une rainure d'une lame de percussion d'un élément de fixation d'un outil de fixation ;
• ledit rebord est porté par ladite paroi ;
• ledit rebord définit ladite première zone d'appui ;
• les première et seconde zones d'appui sont concaves, par exemple cylindriques.

The nose according to the invention may comprise one or more of the following features, taken separately from each other or in combination with each other:

• the geometric and / or dimensional characteristics of the heads of the fasteners of first type and second type are different;
• the relative position of the rod relative to the head of the first and second type fasteners is different;
• the nose at least partially delimits a firing chamber and comprises:
  • a first bearing zone capable of cooperating with a head of said first type fastening element in order to position it before firing;
  • a second support zone remote from said first zone and adapted to cooperate with a head of said second type fastening element for positioning before firing;
• the nose comprises a stepped wall defining said first and second bearing areas;
• said first and second bearing zones are aligned along an axis of elongation of said wall;
• the nose comprises a flange adapted to engage in a groove of a percussion blade of a fixing element of a fixing tool;
• said flange is carried by said wall;
• said flange defines said first bearing zone;
• the first and second support zones are concave, for example cylindrical.

According to a second aspect, the invention furthermore relates to a percussion blade of a fixing element for a fastening tool, such as a nailer, characterized in that said blade is configured to drive a fastener element of a first type and at least one fixing element of a second type having dimensional and / or geometric characteristics different from those of said first type fastening element, the blade having a percussion surface configured to strike, in particular heads, said fasteners respectively placed in separate locations of a guide nose of said tool.

Such a blade makes it possible to accurately hit the fasteners of the first type and the second type, the blade adapting in particular to the refill and more precisely to the arrangement of the fasteners relative to each other. Such percussion limits the double firing and the frictional forces induced on the fired fastener while optimizing firing accuracy.

• les caractéristiques géométriques et/ou dimensionnelles des têtes des éléments de fixation de premier type et second type sont différentes ;
• la position relative de la tige par rapport à la tête des éléments de fixation de premier type et second type est différente ;
• la lame a une forme générale allongée et est symétrique suivant un plan longitudinal, la lame comprenant :
  • des moyens de fixation à un dispositif d'entraînement, situés à une première extrémité longitudinale ;
  • la surface de percussion d'une tête desdits éléments de fixation de premier type et de second type, ladite surface de percussion étant située à une seconde extrémité longitudinale opposée à la première extrémité ;
  • un corps allongé situé entre la première extrémité et la seconde extrémité, ledit corps étant apte à coulisser dans une chambre de tir dans laquelle se trouve ledit élément de fixation de premier type ou de second type à percuter ;
• ledit corps comprenant au moins une rainure longitudinale apte à recevoir un rebord d'un nez de guidage d'éléments de fixation d'un outil de fixation ;
• la rainure est centrée par rapport audit plan et débouche à la fois sur une face supérieure et à fleur de la surface de percussion de la lame ;
• la lame comprend au moins un premier évidemment opposé à ladite rainure, ledit évidemment étant apte à recevoir une languette en saillie d'un bloc de cisaillement d'un outil de fixation ;
• ledit évidemment débouche à la fois sur un flanc, une face inférieure et ladite surface de percussion de la lame ;
• la lame comprend un second évidemment symétrique audit premier évidemment suivant ledit plan ;
• ladite face supérieure et ladite surface de percussion sont reliées via au moins un chanfrein supérieur ;
• ladite face inférieure et ladite surface de percussion sont reliées via au moins un chanfrein inférieur.

The blade according to the invention may comprise one or more of the following features, taken separately from each other or in combination with each other:

• the geometric and / or dimensional characteristics of the heads of the fasteners of first type and second type are different;
• the relative position of the rod relative to the head of the first and second type fasteners is different;
• the blade has a generally elongate shape and is symmetrical along a longitudinal plane, the blade comprising:
  • fastening means to a driving device, located at a first longitudinal end;
  • the percussion surface of a head of said first and second type fasteners, said striking surface being located at a second longitudinal end opposite the first end;
  • an elongated body located between the first end and the second end, said body being slidable in a firing chamber in which there is said first type of attachment element or second type to be struck;
• said body comprising at least one longitudinal groove adapted to receive a rim of a guide nose of fixing elements of a fastening tool;
• the groove is centered with respect to said plane and opens at the same time on an upper face and flush with the percussion surface of the blade;
• the blade comprises at least one first obviously opposite to said groove, said recess being able to receive a tongue protruding from a shear block of a fixing tool;
• said recess opens on both a flank, a lower face and said percussion surface of the blade;
• the blade comprises a second obviously symmetrical to said first obviously along said plane;
• said upper face and said percussion surface are connected via at least one upper bevel;
• said lower face and said percussion surface are connected via at least one lower chamfer.

According to a third aspect, the invention relates to a shear block of a magazine mounted in abutment on the nose of a fastening tool according to a joint plane, said shear block comprising at least one guide track of said fastener element. of first type and / or said securing element of the second type, said track being opposed to said first and second bearing zones.

Such a shear block makes it possible to precisely guide the drawn fastener so that the latter does not come into contact with the fastening element located just below, while stabilizing the trajectory of the fastening element drawn at benefit of shooting accuracy.

• ledit bloc de cisaillement comprend une fenêtre centrale d'alimentation de ladite chambre, ladite fenêtre s'étendant suivant l'axe et débouchant dans ladite chambre ;
• la piste de guidage est formée par deux encoches de guidage de ladite tête de l'élément de fixation de premier type et/ou de ladite tête de l'élément de fixation de second type, lesdites encoches étant en regard l'une de l'autre et bordant au moins en partie ladite fenêtre ;
• ladite piste de guidage fait saillie à l'intérieur de ladite chambre par rapport audit plan de joint ;
• ledit bloc de cisaillement comprend au moins une languette en saillie par rapport audit plan de joint et dans laquelle est formée une des deux encoches, ladite languette étant apte à s'engager dans au moins un évidemment de ladite lame.

The shear block according to the invention may comprise one or more of the following characteristics, taken separately from each other or in combination with each other:

• said shear block comprises a central supply window of said chamber, said window extending along the axis and opening into said chamber;
• the guide track is formed by two notches for guiding said head of the fastener of the first type and / or of said head of the fastener of the second type, said notches being opposite one of the other and bordering at least partly said window;
• said guide track protrudes inside said chamber with respect to said joint plane;
• said shear block comprises at least one tongue protruding from said joint plane and in which is formed one of the two notches, said tongue being adapted to engage in at least one of said blade.

According to a fourth aspect, the invention relates to a fastening tool comprising a nose as described above and / or a blade as described above. This attachment tool is configured to pull a fastener of a first type and at least one fastener of a second type having dimensional and / or geometric characteristics different from those of said fastener of the first type.

Such a so-called versatile (or combined) fastening tool allows a user to pull fasteners of different types for different applications, in particular to benefit productivity.

• les caractéristiques géométriques et/ou dimensionnelles des têtes des éléments de fixation de premier type et second type sont différentes ;
• la position relative de la tige par rapport à la tête des éléments de fixation de premier type et second type est différente ;
• le nez délimite au moins en partie une chambre de tir, ledit nez comportant une première zone d'appui apte à coopérer avec une tête dudit élément de fixation de premier type en vue de son positionnement avant un tir, et au moins une seconde zone d'appui distante de ladite première zone et apte à coopérer avec une tête dudit élément de fixation de second type en vue de son positionnement avant un tir;
• la lame est mobile en translation par rapport audit nez suivant un axe, ladite lame étant apte à percuter une tête desdits éléments de fixation de premier type et de second type ;
• l'outil comprend un magasin comportant un bloc de cisaillement monté en appui sur le nez selon un plan de joint, ledit bloc de cisaillement comprenant au moins une piste de guidage dudit élément de fixation de premier type et/ou dudit élément de fixation de second type, ladite piste étant opposée auxdites première et seconde zones d'appui ;
• ledit bloc de cisaillement comprend une fenêtre centrale d'alimentation de ladite chambre, ladite fenêtre s'étendant suivant l'axe et débouchant dans ladite chambre ;
• la piste de guidage est formée par deux encoches de guidage de ladite tête de l'élément de fixation de premier type et/ou de ladite tête de l'élément de fixation de second type, lesdites encoches étant en regard l'une de l'autre et bordant au moins en partie ladite fenêtre ;
• ladite piste de guidage fait saillie à l'intérieur de ladite chambre par rapport audit plan de joint ;
• ledit bloc de cisaillement comprend au moins une languette en saillie par rapport audit plan de joint et dans laquelle est formée une des deux encoches, ladite languette étant apte à s'engager dans au moins un évidemment de ladite lame ;
• la lame comprend une rainure s'étendant suivant ledit axe et étant apte à recevoir un rebord du nez.

The tool according to the invention may comprise one or more of the following features, taken separately from each other or in combination with each other:

• the geometric and / or dimensional characteristics of the heads of the fasteners of first type and second type are different;
• the relative position of the rod relative to the head of the first and second type fasteners is different;
• the nose at least partially delimits a firing chamber, said nose having a first bearing zone capable of cooperating with a head of said first type fastening element in view of its positioning before a firing, and at least a second firing zone; support remote from said first zone and adapted to cooperate with a head of said second type fastening element for positioning before firing;
• the blade is movable in translation relative to said nose along an axis, said blade being adapted to strike a head of said first type and second type fastening elements;
• the tool comprises a magazine comprising a shear block mounted to bear on the nose in a plane of joint, said shear block comprising at least one guide track of said first type fastening element and / or said second fastening element. type, said track being opposed to said first and second bearing areas;
• said shear block comprises a central supply window of said chamber, said window extending along the axis and opening into said chamber;
• the guide track is formed by two notches for guiding said head of the fastener of the first type and / or of said head of the fastener of the second type, said notches being opposite one of the other and bordering at least partly said window;
• said guide track protrudes inside said chamber with respect to said joint plane;
• said shear block comprises at least one tongue projecting from said joint plane and in which is formed one of the two notches, said tongue being able to engage in at least one of said blade;
• the blade comprises a groove extending along said axis and being adapted to receive a rim of the nose.

BRIEF DESCRIPTION OF THE FIGURES

• la figure 1 est une vue en perspective d'un outil de fixation selon l'invention illustrant notamment le montage d'un magasin sur un nez de l'outil ;
• la figure 2 est une vue de détail de la figure 1 ;
• la figure 3 est une vue de face d'une recharge d'un premier type de clous destinée à être insérée dans le magasin de l'outil ;
• la figure 4 est une vue de face d'une recharge d'un second type de clous destinée à être insérée dans le magasin de l'outil ;
• la figure 5 est une vue juxtaposant deux demi-coupes transversales d'une chambre de tir de l'outil de fixation, à savoir la partie gauche avec un magasin destiné au premier type de clous et la partie droite avec un magasin destiné au second type de clous ;
• les figures 6 et 7 sont respectivement des vues en coupes longitudinale et transversale de l'outil de fixation sur lequel est monté le magasin destiné au premier type de clous, dans une position dite « avant le tir » ;
• les figures 8 à 9 sont respectivement des vues en coupes longitudinale et transversale de l'outil de fixation sur lequel est monté le magasin destiné au premier type de clous, dans une position dite « en cours de tir » ;
• les figures 10 à 11 sont respectivement des vues en coupes longitudinale et transversale de l'outil de fixation sur lequel est monté le magasin destiné au second type de clous, dans une position « avant le tir » ;
• les figures 12 à 13 sont respectivement des vues en coupes longitudinale et transversale de l'outil de fixation sur lequel est monté le magasin destiné au second type de clous, dans une position « en cours de tir » ;
• la figure 14 est une vue de côté d'une lame de l'outil de fixation ;
• la figure 15 est une vue de face de la lame de la figure 14.

The invention will be better understood and other details, characteristics and advantages of the present invention will appear more clearly on reading the description which follows, given by way of non-limiting example and with reference to the accompanying drawings, in which:

• the figure 1 is a perspective view of a fixing tool according to the invention illustrating in particular the mounting of a magazine on a nose of the tool;
• the figure 2 is a detail view of the figure 1 ;
• the figure 3 is a front view of a refill of a first type of nails for insertion into the tool magazine;
• the figure 4 is a front view of a refill of a second type of nails for insertion into the tool magazine;
• the figure 5 is a view juxtaposing two half-cross sections of a firing chamber of the attachment tool, namely the left part with a magazine for the first type of nails and the right part with a magazine for the second type of nails;
• the Figures 6 and 7 are respectively views in longitudinal and transverse sections of the fastening tool on which is mounted the magazine for the first type of nails, in a position called "before firing";
• the Figures 8 to 9 are respectively views in longitudinal and transverse sections of the fastening tool on which is mounted the magazine for the first type of nails, in a position called "in the process of fire";
• the Figures 10 to 11 are respectively views in longitudinal and transverse sections of the fastening tool on which is mounted the magazine for the second type of nails, in a position "before firing";
• the Figures 12 to 13 are respectively views in longitudinal and transverse sections of the fastening tool on which is mounted the magazine for the second type of nails, in a position "under firing";
• the figure 14 is a side view of a blade of the attachment tool;
• the figure 15 is a front view of the blade of the figure 14 .

DETAILED DESCRIPTION

The attachment tool 1 shown on the figure 1 is in this case a nailer 1. The tool 1 comprises a housing 2 in which there is a drive device 3 configured to move a blade 4 along a longitudinal axis X. The blade 4 is in this case suitable to strike a head 5a, 5b of a nail 6a, 6b, present in a firing chamber 7 and extracted from a feed magazine 8a, 8b, to launch this nail 6a, 6b so that it can anchor in a support material.

At the front of the housing 2, a nose 9 and a shear block 10a, 10b internally delimit the firing chamber 7 and a mouth 11 through which the nail 6a, 6b leaves the chamber 7. The shear block 10a, 10b is an integral part of the magazine 8a, 8b removably mounted on the nose 9 of the tool 1. The nails 6a, 6b stored in the magazine 8a, 8b are introduced one by one into the firing chamber 7 through a feed window 12 made in the shear block 10a, 10b.

The tool 1 further comprises a handle 13 for handling and handling formed by the casing 2. An actuation trigger 14, placed at the top of the handle 13, allows the user to initiate the shot, under condition generally a probe 15a, 15b is engaged.

The probe 15a, 15b is an integral part of a so-called "probe assembly" mounted in particular movable in translation relative to the nose 9 of the tool 1. The probe assembly and the trigger 14 are complementary means allowing the user to initiate the shooting safely.

• une première portion 22 filetée sur laquelle est monté le palpeur 15a, 15b, et
• une seconde portion 23 sur laquelle est goupillée une molette 24, la seconde portion 23 étant montée mobile en rotation par rapport à la chape 19.

More specifically, the probe 15a, 15b allows the user to aim the location of the nail 6a, 6b on the support material by bringing the probe 15a, 15b in contact with the latter. The probe assembly further comprises an armature 16 comprising a central head 17 movably mounted on the nose 9 of the tool 1 and two branches 18 overlapping the drive device 3, each branch 18 extending from the head 17 and being connected to the device of drive 3 at its free end. The probe assembly also comprises a device for adjusting the depression of the probe 15a, 15b. The adjusting device comprises a yoke 19 fixed to the head 17 of the frame 16 via two rivets 20 and a shaft 21 comprising:

• a first threaded portion 22 on which is mounted the probe 15a, 15b, and
• a second portion 23 on which is pinned a wheel 24, the second portion 23 being rotatably mounted relative to the yoke 19.

The rotation of the wheel 24 by the user thus makes it possible to adjust the depression of the probe 15a, 15b.

According to the invention, the tool 1 is configured to pull a nail of a first type 6a (shown in FIG. figure 3 ) and at least one nail of a second type 6b (shown in the figure 4 ) having dimensional and / or geometric characteristics different from those of the first type nail 6a.

Thus, as described in the following description, to switch from one application to another (and in other words to pass from the first type of nails 6a to the second type of nails 6b or vice versa), the user does not need to switch at most that the store 8a, 8b supply and the probe 15a, 15b.

In the following description and according to the example shown in the figures, the first type of nails 6a said "nail B / B" for (Wood on Wood) is represented on the figure 3 and the second type of nails 6b called "nail M / B" for (Metal on Wood) is represented on the figure 4 .

• une tête 5a ronde ;
• une tige 25a décentrée par rapport à la tête 5a et en majorité crantée ;
• une pointe 26a à quatre pans inclinés ;
• le clou 6a est en acier, par exemple galvanisé.

The nail B / B 6a is thus intended to fix a first wooden element to a second wooden element. The wooden elements are for example battens, slats, contrelattes, dies, etc. The B / B nail 6a shown on the figure 3 is a nail known under the trademark RounDrive ®. Such a nail B / B 6a has in particular the following technical characteristics:

• a round head 5a;
• a rod 25a off-center with respect to the head 5a and predominantly notched;
• a tip 26a inclined four-sided;
• the nail 6a is made of steel, for example galvanized.

Such a nail B / B 6a makes it possible to have a large number of nails B / B 6a per refill 26a. As illustrated on the figure 3 , a refill 26a is in the form of a strip of nails 6a, the nails 6a being contiguous to each other with a constant pitch and held in position by adhesive strips 28a paper. The B / B nails 6a are inclined with respect to the direction of extension of the adhesive strips 28a.

• une tête 5b ronde ;
• une tige 25b centrée par rapport à la tête 5b et en majorité crantée ;
• une pointe 26b à quatre pans inclinés ;
• le clou 6b est en acier trempé, par exemple galvanisé.

The M / B nail 6b is thus intended to fix a first metal element to a wooden element. The metal element is for example a connector, a shoe, a square, etc. As mentioned above, the wooden element is for example a batten, a battens, a contrelatte, a batt, etc. The nail M / B 6b shown on the figure 4 presents in particular the following technical characteristics:

• a 5b round head;
• a rod 25b centered with respect to the head 5b and in majority notched;
• a tip 26b inclined four-sided;
• the nail 6b is hardened steel, for example galvanized.

In comparison with a refill 26a of nails B / B 6a, the density of nails M / B 6b on a refill 26b is lower. In the same way as the B / B nails 6a, the M / B nails 6b are joined to each other with a constant pitch and held in position by adhesive paper strips 28b, the M / B nails 6b being also inclined by report in direction of extension of the adhesive strips 28b.

As presented above and illustrated on the Figures 3 and 4 , a B / B nail 6a and an M / B nail 6b have particular dimensional and / or geometric characteristics. In this case, to switch from one application to another (and in other words go from the nail B / B 6a to the nail M / B 6b or vice versa), the user needs to switch only the feed magazine 8a, 8b and the probe 15a, 15b.

Thus, in the remainder of the description, for the nails B / B 6a, one will speak of store B / B 8a and probe B / B 15a. In the same way, for the nails M / B 6b, one will speak of magazine M / B 8b and probe M / B 15b.

It is also noted that the mechanical properties of the nails B / B 6a and M / B 6b are different. The quenching of the nail M / B 6b allows it to have in particular a higher tensile strength, elastic limit and hardness than those of the nail B / B 6a.

As illustrated on figures 6 and 8 , the probe B / B 15a comprises a U-shaped front end provided with several pins 29 intended to come into contact with the support material.

As illustrated on figures 10 and 12 , the probe M / B 15b comprises a centering member 30 mounted on biasing means. In use, upstream of the shot, the user positions the centering member 30 in a hole of the metal element to be fixed. Then, during firing, the centering member 30 is erased to allow the nail M / B 6b to pass. Such an M / B probe 15b makes it possible to accurately pull the M / B nail 6b through the desired hole of the metal element.

The drive device 3 can move the blade 4 along said axis X from a thermal energy and / or pneumatic and / or electric.

According to the embodiment illustrated in the figures, the drive device 3 is a heat engine. The blade 4 is in this case attached to a piston movable in a combustion chamber. The piston is set in motion by the combustion of a mixture of air and gas from a cartridge mounted in the tool 1.

The various aspects of the invention will now be described which can be integrated, independently of each other or in combination with each other, in tool 1 of the invention. figure 1 .

In the mounted position, the nose 9, the shear block 10a, 10b and the blade 4 have a common plane of symmetry noted S passing in particular by the longitudinal axis X.

• une direction longitudinale, horizontale, confondue avec l'axe X,
• une direction transversale, horizontale, définie par un axe perpendiculaire au plan S,
• une direction verticale, définie par un axe passant par le plan S et perpendiculaire à X.

By convention, one defines with respect to the tool 1 the following directions:

• a longitudinal, horizontal direction, coincident with the X axis,
• a transverse direction, horizontal, defined by an axis perpendicular to the plane S,
• a vertical direction, defined by an axis passing through the plane S and perpendicular to X.

Nose (also called tip guide)

One aspect of the invention is the nose 9 of the tool 1. The nose 9 is configured to pull a B / B nail 6a and an M / B nail 6b. The nose 9 thus has a location B / B 79a ( figure 6 ) in which the nail B / B 6a is placed before being pulled and a location M / B 79b ( figure 10 ) in which the M / B nail 6b is placed before being pulled, the B / B location 79a being distinct from the M / B location 79b.

The nose 9 is symmetrical along the plane S. The nose 9 delimits in part a firing chamber 7 and has a first bearing zone 31a (called bearing zone B / B) adapted to cooperate with the head 5a of the nail B / B 6a for positioning before a shot ( figure 6 ). The nose 9 comprises a second bearing zone 31b (called support zone M / B) distant longitudinally from the first zone 31a and adapted to cooperate with a head 5b of the nail M / B 6b for its positioning before a shot ( figure 10 ).

According to the embodiment illustrated in the figures, the nose 9 has a fastening base 32 at the fixed part of the driving device 3 and an advance 33 (or spout) oriented along the X axis, this step 33 becoming thinner. from base 32.

As illustrated on the figure 5 , the nose 9 internally comprises a cavity 34 extending along the axis X and forming part of the firing chamber 7. The cavity 34 is delimited vertically by an upper wall 35 and opens out inferiorly on a flat joint surface 36 with the shear block 10a, 10b. The cavity 34 is laterally delimited by two concave edges 37, the cavity 34 flaring from the top wall 35 to the flat surface 36.

As illustrated on figures 6 , 8 , 10 and 12 the top wall 35 is stepped and defines the bearing areas B / B 31a and M / B 31b, the bearing area M / B 31b being slightly raised relative to the bearing area B / B 31 a. The bearing areas B / B 31a and M / B 31b are aligned along an axis of elongation of the wall 35, and in other words along the axis X.

As illustrated in particular on the figure 5 , the wall 35 comprises a flange 38 (or lug) projecting vertically in the chamber 7 and centered with respect to the plane S, this flange 38 having a rectangular cross-sectional shape. The rim 38 extends longitudinally from the base 32 of the nose 9 and is able to engage in a groove 39 of the blade 4.

As illustrated in particular on the figure 6 , the flange 38 defines the bearing zone B / B 31 a.

The bearing zones 31a, 31b are concave, and more precisely cylindrical. As illustrated on the figure 7 , the bearing area B / B 31a has a radius substantially equal to that of the head 5a of the nail B / B 6a so as to precisely position the head 5a in the firing chamber 7. In the same way, the zone M / B support 31b has a radius substantially equal to that of the head 5b of the nail M / B 6b.

The support zones B / B 31a and M / B 31b are connected longitudinally via a connecting zone 40 on a slope. The bearing zone B / B 31a is extended so as to extend from a rear stop to the connection zone 40. The bearing zone M / B 31b is extended so as to extend from the connecting zone 40 to the mouth 11 of the firing chamber 7.

As illustrated on the figure 7 each side edge 37 of the cavity 34 is connected to the flange 38 and to the bearing area M / B 31b via a substantially horizontal plane recess 42.

As illustrated on the figure 2 , the nose 9 further comprises two pins 43 projecting from the flat surface 36, positioned on either side of the cavity 34, each of them being able to engage in a bore 44 of complementary shape formed in a ear 45 of the shear block 10a, 10b. The nose 9 also has two teeth 46 projecting from the flat surface 36. The teeth 46 extend longitudinally and are positioned on either side of the cavity 34, each tooth 46 being able to engage in a notch 47 practiced in the curd block 10a, 10b. The pins 43 and the teeth 46 make it possible to position the shear block 10a, 10b (magazine 8a, 8b) relative to the nose 9.

As illustrated in particular in figures 2 and 5 , in the front part, the nose 9 comprises a guiding groove 48 extending longitudinally on each of the lateral parts of the nose 9, each of the grooves 48 being able to receive a lip 49 projecting from the feeler 15a, 15b to allow the guiding translation of the latter on the nose 9 of the tool 1.

As illustrated on the figure 2 , at the rear, the nose 9 comprises a guide rail having two U-shaped edges 50, each of them bordering the nose 9 and being turned outwards. The head 17 of the armature 16 of the probe assembly is mounted to move in translation on the rail of the nose 9.

Shear block (also called "connector")

One aspect of the invention relates to the shear block 10a, 10b of the magazine 8a, 8b. As a reminder, according to the embodiment illustrated in the figures, depending on the type of nails 6a, 6b to be pulled, the user mounts the B / B magazine 8a or the M / B magazine 8b on the nose 9 of the tool 1.

A shear block 10a, 10b is symmetrical along the plane S and delimits the lower part of the firing chamber 7. The shear block 10a, 10b comprises a planar joining surface 51 with the nose 9. The shear block 10a, 10b includes a window 12 power station of the chamber 7, the window 12 extending along the X axis and opening into the firing chamber 7.

The shear block 10a, 10b further comprises at least one guide track 52, 53 of the corresponding nail 6a, 6b, the track 52, 53 being opposite to the bearing zones B / B 31a and M / B 31b of the nose 9. The guide track 52, 53 is formed by two notches 54a, 54b for guiding the head 5a, 5b of the nail 6a, 6b corresponding, the notches 54a, 54b being opposite one another and bordering partly window 12.

According to the embodiment illustrated in the figures, the window 12 is substantially T-shaped, and comprises a rear opening 56 for passing the heads 5a, 5b of nails 6a, 6b in the firing chamber 7 and a front opening 57 of passage of the rods 25a, 25b of nails 6a, 6b in the firing chamber 7.

As illustrated on figures 6 , 8 , 10 and 12 , the shear block 10a, 10b comprises an inclined rear track 53 (similar to a launching ramp), this rear track 53 rising from a threshold 58 located near the rear opening 56 to a cross with a front track 52. The front track 52 is substantially rectilinear and extends longitudinally from the intersection with the rear track 53 to the mouth 11 of the firing chamber 7.

As illustrated in particular in figures 9 and 13 the front notches 54a, 54b of the front track 52 are positioned in the firing chamber 7 and dimensioned such that during firing, the head 5a, 5b of the fired nail 6a, 6b is guided so that the latter ( and in particular the head 5a, 5b) does not come into contact with the nail 6a, 6b located just below. The notches before 54 are longitudinal and symmetrical with respect to the plane S. The notches before 54a, 54b are concave, and more precisely cylindrical. The notches before 54a, 54b have a radius substantially equal to that of the head 5a, 5b of the nail 6a, 6b corresponding.

As illustrated on figures 7 and 9 , in connection with the shear block B / B 10a, the front notches 54a are each formed in a tongue 59 in protruding from the flat surface 51 and extending along the axis X, the tongues 59 then protruding inside the firing chamber 7. Each tongue 59 is able to engage in a recess 60 of complementary shape practiced 4. During firing, the rear track 53 makes it possible in particular to place the head 5a of the B / B nail 6a in the upper part of the firing chamber 7. In the mounted position, the rear opening 56 is vertically in position. M / B bearing area 31b and the rear track 53 is vertically facing the connection zone 40.

As illustrated on figures 11 and 13 , in connection with the shear block M / B 10b, the notches before 54b are each formed flush with the flat surface 51.

As illustrated on figures 5 , 7 , 9 , 11 and 13 when the magazine 8a, 8b is mounted on the tool 1, the nose 9 and the shear block 10a, 10b are mounted in abutment in a plane of joint P, the flat surfaces 36, 51 of the nose 9 and the block of shear 10a, 10b being in contact.

The magazine 8a, 8b is held in position by means of a clamping button (not visible). The refills 26a, 26b of nails 6a, 6b are introduced into the magazine 8a, 8b through a slot (not visible) made at the bottom. An elevator 61 makes it possible to raise the refill 26a, 26b after each shot, and in other words to reload the chamber 7 following each shot.

As illustrated on the figure 6 before being pulled, the head 5a of the nail B / B 6a bears against the bearing zone B / B 31a of the nose 9 and the rod 25a near the tip 26a of the nail B / B 6a is resting on the upper wall 35 of the nose 9 (or close to the upper wall 35). The B / B nail 6a is then inclined in the firing chamber 7 by about ten degrees with respect to the longitudinal direction (eight degrees in the illustrated example).

In the same way, as illustrated on the figure 10 , before being pulled, the head 5b of the nail M / B 6b is resting on the bearing area M / B 31b of the nose 9 and the rod 25b near the tip 26b of the nail M / B 6b is resting on the upper wall 35 of the nose 9 (or close to the upper wall 35). The nail M / B 6b is then inclined in the firing chamber 7 by a few degrees with respect to the longitudinal direction (three degrees in the illustrated example).

Blade

One aspect of the invention relates to the blade 4 of the tool 1. The blade 4 is configured to pull a nail B / B 6a and a nail M / B 6b. The blade 4 has a percussion surface 63 configured to strike the nails 6a, 6b placed in their respective location 79a, 79b.

• des moyens de fixation à la partie mobile du dispositif d'entraînement 3, situés à une première extrémité longitudinale dite extrémité arrière 62 ;
• la surface de percussion 63 des têtes 5a, 5b de clous B/B 6a et M/B 6b, la surface de percussion 63 étant située à une seconde extrémité longitudinale dite extrémité avant 64 opposée à l'extrémité arrière 62 ;
• un corps 65 allongé situé entre l'extrémité arrière 62 et l'extrémité avant 64, le corps 65 étant apte à coulisser dans la chambre de tir 7 dans laquelle se trouve le clou 6a, 6b à percuter ;

The blade 4 has a generally elongated shape and is symmetrical along the plane S, the blade 4 comprising:

• fastening means to the movable portion of the driving device 3, located at a first longitudinal end, said rear end 62;
• the percussion surface 63 of the heads 5a, 5b of nails B / B 6a and M / B 6b, the striking surface 63 being located at a second longitudinal end, said front end 64 opposite the rear end 62;
• an elongated body 65 situated between the rear end 62 and the front end 64, the body 65 being able to slide in the firing chamber 7 in which the nail 6a, 6b is to be struck;

The body 65 further comprises a longitudinal groove 39 capable of receiving the flange 38 of the nose 9.

According to the embodiment illustrated in particular on the Figures 14 and 15 , the fixing means correspond in this case to a threaded pin 66 extending from the rear end 62 to a shoulder 67 formed in a collar 68 separating the pin 66 from the body 65 of the blade 4.

The groove 39 extends longitudinally and is of complementary shape to the flange 38 of the nose 9, namely rectangular in cross section. The groove 39 is centered with respect to said plane S, and opens out both on an upper face 69 of the blade 4 and flush with the percussion surface 63.

The body 65 is delimited laterally by two concave sides 70 of complementary shape to the lateral edges 37 of the cavity 34. In section transversely, laterally, the blade 4 flares from the upper face 69 to a lower face 71 vertically opposite the upper face 69.

The body 65 comprises two longitudinal recesses 60 opposite the groove 39, each recess 60 being able to receive a tongue 59 of the shear block B / B 10a. Each recess 60 is thus of complementary shape to a tongue 59 of the shear block 10a, namely substantially rectangular. Each recess 60 opens out onto a flank 70, the lower face 71 and onto the percussion surface 63. The body 65 then has a V-shaped section in cross section. Each recess 60 has a substantially horizontal upper edge 72 (perpendicular to the S plane) and an inclined lateral edge 73 extending from the upper edge 72 and towards the plane S.

• deux chanfreins supérieurs 74 disposés de part et d'autre de la rainure 39, chaque chanfrein 74 reliant la face supérieure 69 à la surface de percussion 63 ;
• un chanfrein inférieur 75 reliant la face inférieure 71 à la surface de percussion 63 ;
• deux joues 76 convexes disposées de part et d'autre de la surface de percussion 63, chaque joue 76 reliant un flanc 70 à la surface de percussion 63.

Near its front end 64, the body 65 includes a section reduction, and more specifically:

• two upper chamfers 74 disposed on either side of the groove 39, each chamfer 74 connecting the upper face 69 to the percussion surface 63;
• a lower chamfer 75 connecting the lower face 71 to the percussion surface 63;
• two convex cheeks 76 disposed on either side of the percussion surface 63, each cheek 76 connecting a flank 70 to the percussion surface 63.

The percussion surface 63 is flat and has a T-shaped profile ( figure 15 ).

The blade 4 further comprises an upper fillet 77 connecting the collar 68 to the upper face 69 of the body 65 and a lower fillet 78 connecting the collar 68 to the lower face 71 of the body 65.

The blade 4 has mechanical properties allowing it to mechanically withstand repeated firing of nails B / B 6a and / or nails M / B 6b. The impact surface 63 has in particular a high resilience so to preserve its geometrical characteristics (and in particular its flatness) and dimensional shots after shots.

As illustrated on Figures 6 to 9 when firing a B / B nail 6a, the percussion surface 63 of the blade 4 strikes the exposed portion of the head 5a of the B / B nail 6a (present in the firing chamber 7) so that the blade 4 does not simultaneously drive two nails B / B 6a superimposed. As a result of the percussion, the head 5a of the B / B nail 6a is recentered with respect to the percussion surface 63 of the blade 4 via the rear track 53, this refocusing allowing the blade 4 to exert a thrust at the the center of the head 5a of the nail B / B 6a, when the latter is on the front track 52. The trajectory of the nail B / B 6a pulled is then stabilized on the front track 52 so as to give the nail B / B 6a pulled a substantially longitudinal trajectory at the mouth outlet 11, and in other words a path coincident with the blade direction 4.

As illustrated on Figures 10 to 13 when firing an M / B nail 6b, the percussion surface 63 of the blade 4 strikes the head 5a of the M / B nail 6b at its center. As a result of the percussion, the trajectory of the nail M / B 6b is stabilized on the front track 52 so as to give the nail M / B 6b pulled a substantially longitudinal trajectory at the mouth exit 11, and in other words a trajectory confused with the blade direction 4.

The embodiment illustrated in the figures is in no way limiting, this attachment tool 1 could be intended to cause staples, points, pins, etc..

Claims (15)

Nose (9) for guiding fastening elements for a fastening tool (1), such as a nailer, characterized in that said nose (9) is configured to pull a fixing element of a first type (6a ) and a fastener of at least a second type (6b) having dimensional and / or geometric characteristics different from those of said first type fastener (6a), the nose (9) having locations (79a, 79b) ), in particular heads, said first and second type fasteners (6a, 6b). Nose (9) according to claim 1, characterized in that it delimits at least in part a firing chamber (7) and comprises: A first bearing zone (31 a) capable of cooperating with a head (5a) of said first type fastening element (6a) with a view to positioning it before firing; A second bearing zone (31b) spaced from said first zone (31a) and able to cooperate with a head (5b) of said second type fastening element (6b) in order to position it before firing. Nose (9) according to claim 2, characterized in that it comprises a stepped wall (35) defining said first and second bearing zones (31a, 31b). Nose (9) according to claim 3, characterized in that said first and second bearing areas (31a, 31b) are aligned along an axis of elongation of said wall (35). Nose (9) according to one of claims 2 to 4, characterized in that it comprises a flange (38) adapted to engage in a groove (39) of a blade (4) of percussion of an element fixing a fixing tool (1). Blade (4) for striking a fastening element for a fastening tool (1), such as a nailer (1), characterized in that said blade (4) is configured to drive a fastener element of a first type (6a) and at least one securing element of a second type (6b) having dimensional and / or geometric characteristics different from those of said first type fastening element (6a), the blade (4) having a surface percussion device (63) configured to impact, in particular heads, said fastening elements (6a, 6b) respectively placed in locations (79a, 79b) separate from a nose (9) for guiding said tool (1). Blade (4) according to claim 6, characterized in that it has a generally elongate shape and is symmetrical along a longitudinal plane (S), the blade (4) comprising: • attachment means to a driving device (3), located at a first end (62) longitudinal; The percussion surface (63) of a head (5a, 5b) of said first and second type fasteners (6a, 6b), said percussion surface (63) being located at a second end (64) longitudinal opposite the first end (62); An elongate body (65) located between the first end (62) and the second end (64), said body (65) being able to slide in a firing chamber (7) in which said first fixing element is located. type (6a) or second type (6b) to be struck; said body (65) comprising at least one longitudinal groove (39) adapted to receive a flange (38) of a nose (9) for guiding fastening elements of a fastening tool (1). Blade (4) according to claim 7, characterized in that the groove (39) is centered with respect to said plane (S) and opens at the same time on an upper face (69) and flush with the percussion surface (63) of the blade (4). Blade (4) according to one of claims 7 or 8, characterized in that the blade (4) comprises at least one first recess (60) opposite said groove (39), said recess (60) being adapted to receive a tongue (59) projecting from a shear block (10a) of a fastening tool (1). Blade (4) according to claim 9, characterized in that said recess (60) opens on both a sidewall (70), a lower face (71) and said percussion surface (63) of the blade (4). Fastening tool (1), comprising a nose (9) according to one of claims 1 to 8 and / or a blade (4) according to one of claims 9 to 16. Fastening tool (1) according to claim 11, characterized in that : The nose (9) delimits at least in part a firing chamber (7), said nose (9) having a first bearing zone (31 a) adapted to cooperate with a head (5a) of said first fixing element type (6a) for its positioning before a firing, and at least a second bearing zone (31b) distant from said first zone (31 a) and adapted to cooperate with a head (5b) of said fastening element of second type (6b) for positioning before a shot; The blade (4) is movable in translation relative to said nose (9) along an axis (X), said blade (4) being able to strike a head (5a, 5b) of said first type fastening elements (6a) and of second type (6b). Fastening tool (1) according to claim 12, characterized in that it comprises a magazine (8a, 8b) comprising a shear block (10a, 10b) mounted to bear on the nose (9) in a plane of joint ( P), said shear block (10a, 10b) comprising at least one guide track (52, 53) of said first type fastener (6a) and / or said second type fastener (6b), said track (52, 53) being opposed to said first and second bearing zones (31a, 31b). Fixing tool (1) according to claim 13, characterized in that said shear block (10a, 10b) comprises a window (12) central supply of said chamber (7), said window (12) extending according to the axis (X) and opening into said chamber (7). Fixing tool (1) according to claim 14, characterized in that the guide track (52, 53) is formed by two notches (54a, 54b) for guiding said head (5a) of the first fastening element type (6a) and / or said head (5b) of the securing element of second type (6b), said notches (54a, 54b) facing each other and bordering at least in part said window (12).

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