FR3035011A1 - NOZZLE FOR A CHEMICAL SEAL RESIN INJECTION TOOL - Google Patents

Abstract

Nozzle (110) for a chemical sealing resin injection tool (30) in a hole of a wall, said nozzle having an elongated body and having a longitudinal end of connection to said tool, said body comprising at least one internal longitudinal passage of resin passage, characterized in that it comprises means (130, 138a) for cleaning said hole by brushing and / or air injection.

Description

FIELD OF THE INVENTION The invention relates to the field of portable tools and in particular those for carrying out work in or on a wall, such as a perforator or an injection tool. of chemical sealing resin. STATE OF THE ART A perforator makes it possible, by means of a drill, to make a hole in a wall. A chemical sealing resin injection tool is used to inject resin into a pre-drilled hole in a wall to seal an element such as a concrete reinforcing bar, for making a wall or a screed for example. The tools currently on the market, however, have drawbacks. In the case where they are equipped with a removable secondary handle for example, the assembly / disassembly of the handle is relatively long and complex to achieve so that the handle is either permanently maintained on the tool without being used or it is never used and therefore removed from the tool. This handle generally comprises a first grip portion which has an elongated shape and which is configured to be gripped by a user's hand, and a second mounting portion on the tool formed by a clamp. The collar is open and includes a slot that is closed by a screw. In the case where this screw is not equipped with a knob or a butterfly, mounting and tightening the handle on the tool would require the use of a screwdriver, which would make the assembly / disassembly of the long and complex handle, especially because of the tightening / loosening operation of the screw. In addition, this type of handle is relatively expensive and has a relatively large mass, especially because it comprises several parts. Moreover, when a hole of a determined length must be pierced in a wall by means of a perforator, it is known to equip the perforator with a probe intended to bear on the wall. In practice, this feeler is formed by a straight rod which is slidably mounted in a holder on one side of the perforator in a direction parallel to the drill bit. It is possible to adjust the position of the rod with respect to its support and to immobilize it in a given position by means of a knob or a clamping screw possibly equipped with a knob. The free end of the rod located on the side of the drill is intended to bear on the wall when the desired depth of drilling is reached. The position of the rod is thus adjusted so that the distance between the free ends of the rod and the drill corresponds to the desired drilling depth. This system is not always reliable and therefore little used, in particular because the rod can move in operation if the screw is not properly tightened. Thus, a user tends to adopt a simpler alternative solution of attaching a piece of tape to the drill in a longitudinal position to define the desired depth of drilling. In addition, before using a chemical sealing resin injection tool, it is necessary to use other tools as schematically shown in FIG. 1, which makes the chemical sealing operation time consuming and tedious. . A first step consists in drilling a hole 10 of a given length with a perforator 12 equipped with a drill 14. A second step consists in injecting air 16 under pressure into the hole 10 by means of another tool 18 connected by a flexible hose to a compressor and having a longitudinal end inserted into the hole. The injection of air into the hole expels dust and debris from the hole resulting from the first piercing step. Another step is to clean the inside of the hole by brushing using the perforator 12 or a drill equipped with a brush 19. The brush 14 is rotated and inserted into the hole 10 to scan the inner cylindrical surface 20 the hole. This brushing step is followed by a new step of injecting air 16 under pressure into the hole 10 by means of the tool 18, so as to remove the dust and debris removed from the walls of the hole during the operation. brushing. Finally, the resin injection step 22 can be performed by means of a tool 24 equipped with a nozzle 26 which is inserted into the hole 10. It is difficult to control the quantity of resin 22 injected into the hole 10, the operator to inject resin on the half-length of the hole on the side opposite the tool 24 and leave free the half-length of the hole on the side of the tool. This prevents the resin from loosening too much from the hole when inserting a concrete bar to the bottom of the hole. This difficulty is reinforced by the fact that the ambient temperature has an influence on the viscosity of the resin. When the ambient temperature is very low, the resin is relatively viscous and a large pressure on the trigger of the injection tool must be applied, in particular when this pressure is transmitted mechanically to an injection piston of the resin. This significant pressure can be interpreted by an operator as being due to too much resin in the hole, which is not the case and can therefore lead to poor fixing of the concrete in the hole for lack of resin. The present invention provides a simple, effective and economical solution to at least some of the aforementioned problems. SUMMARY OF THE INVENTION According to a first aspect, the invention proposes a nozzle for a chemical sealing resin injection tool in a hole of a wall, said nozzle comprising an elongated body and comprising a longitudinal connection end. said tool, said body comprising at least one internal longitudinal passage of resin passage, characterized in that it comprises means for cleaning said hole by brushing and / or air injection. The invention has a clear advantage over the prior art because it combines in one tool two functions namely resin injection and cleaning the hole. In the prior art described above, the cleaning of the hole is achieved by means of two separate tools, which respectively provide cleaning of the hole by brushing and cleaning the hole by air injection. The tool according to the invention combines with the resin injection function at least one, and preferably two types of cleaning. Insofar as the tool would be configured to provide cleaning of the hole by brushing, it would do without the tool of the prior art formed by the drill and the brush. Since the tool would be configured to provide air hole cleaning, this would eliminate the prior art compressed air gun. Advantageously, the tool according to the invention combines the two types of cleaning with the resin injection function, which makes it possible to dispense with the two aforementioned tools. It is thus possible to use only one tool to implement the last four steps shown in Figure 1, against three tools in the prior art. This represents a significant time saving for a resin injection operation and a significant simplification of this operation. The nozzle according to the invention may comprise one or more of the following characteristics, taken separately from one another or in combination with each other: said body comprises at least one internal longitudinal channel for air passage; preferably, said at least one channel is an air expulsion channel (which would be injected into the hole) but it is conceivable to provide instead or in addition at least one air suction channel (the air would be sucked from the hole); said at least one channel and said at least one duct extend substantially over the entire longitudinal dimension of the nozzle, said at least one channel may extend over only a portion of the longitudinal dimension of the nozzle, particularly for use of the nozzle in a small diameter hole, for example less than 20mm; said at least one channel could then emerge, not at the longitudinal end of the nozzle opposite its connecting end, but at a distance from these ends, - said at least one channel and said at least one conduit open at each end longitudinal nozzle, - said at least one channel has a circular or parallelepiped shaped section, 3035011 - said body comprises a single air passage channel which is traversed by the longitudinal axis of the nozzle, - said body comprises a single resin passage duct, - said at least one channel and said at least one duct are parallel, - at least one of said at least one channel and said at least one duct has a helical shape, - said body comprises at least one two resin passageways regularly distributed around said longitudinal axis; the nozzle comprises two diametrically opposite resin passage ducts with respect to said longitudinal axis, and between which extends said single channel, - each of said two ducts has in cross section a substantially semicircular shape, - said two ducts define between them a longitudinal space of which a median portion is occupied by said single channel and the two lateral parts are at least partly recessed and preferably define external longitudinal grooves of said body, - the nozzle comprises an end piece attached to the longitudinal end of the body opposite to said connecting end, this endpiece comprising at least one ejection port of air in fluid communication with said at least one channel, and at least one resin ejection port in fluid communication with said at least one conduit; the nozzle comprises means for brushing at least one inner surface of said hole; said brushing means comprise at least one brush and for example a single brush, the or each brush has a helical shape , which may extend over all or part of the longitudinal dimension of the nozzle, as is the case of a brush for example, - said brushing means comprise at least two independent external brushes, 3035011 6 - said brushes are diametrically opposed relative to a longitudinal axis of the body, - each of said brushes has a generally planar shape, - each of said brushes has a substantially radial orientation and comprises a free radially outer end and an inner radial end of attachment to said body, - said brushes are respectively mounted in longitudinal grooves of said body, such as those aforesaid extending between the two ducts, - said body is formed in one piece, - said nozzle comprises means for brushing an inner surface of said hole, and - said tip comprises means for rotating the air contained in the hole. The present invention also relates to a chemical sealing resin injection tool, configured to be equipped with a nozzle as described above, characterized in that it comprises means for injecting the resin into said at least one a conduit and: - air injection means in said hole, and / or - means for rotating the nozzle for brushing at least one inner surface of said hole. The tool according to the invention may comprise one or more of the following features, taken separately from one another or in combination with each other: said resin injection means comprise a rotary mixer which is configured to be secured in rotation at said connection end of the nozzle body, - said resin injection means comprise a fixed mixer, while the nozzle itself may be rotatable, - said mixer comprises a longitudinal first end of connection at a longitudinal end said at least one channel or duct, said mixer having a first airflow bore, which opens on said first longitudinal end for the supply of air to said at least one channel, the mixer comprises at one end opposite longitudinal portion of a connection portion to a drive member, itself connected to an output shaft of an engine or geared motor, said drive member having a second air flow bore in fluid communication with said first bore, and said drive member comprises an outer annular groove in fluid communication with said second bore, said fluid body the drive being at least partly surrounded by a stator bushing which closes said groove and which comprises at least one substantially radial orifice opening into said groove and configured to be connected to an air outlet of a compressor integrated into the tool for example by means of a flexible hose. The present invention also relates to a method for injecting chemical sealing resin into a hole of a wall, by means of a single tool equipped with a nozzle as described above, characterized in that it comprises the steps of: - inserting the nozzle into the hole, - injecting air into the hole by means of the nozzle and / or rotating the nozzle in order to brush with the nozzle at least one internal surface of the hole, - inject resin into the hole using the nozzle. It is conceivable to dispense with air injection, in particular for cleaning small diameter holes. The dust would then be peeled off the surface of the hole by brushing and ejected by the brushing effect itself at one and / or the other end of the hole, that is to say at the bottom of the hole if it is rather vertical down, and outside the hole if it is horizontal or otherwise. The method may comprise steps of: - controlling the progressive advance of the nozzle in the hole and / or the gradual withdrawal of the nozzle from the hole, by cooperation of tool support means with said wall. The method may comprise the steps of: - rotating the nozzle, the nozzle being kept in rotation during all subsequent steps of the process, - starting the insertion of the nozzle into the hole for the purpose of brushing it, - injecting the air in the hole by means of the nozzle, - continue the insertion of the nozzle in the hole while continuing to inject air into the hole, - possibly stop the injection of air into the hole - inject resin into the hole, - start removing the nozzle from the hole while continuing to inject resin into the hole, - continue removing the nozzle until it comes out of the hole, the injection preferably the resin is stopped before the exit of the nozzle from the hole. According to a second aspect, the invention proposes a portable tool for carrying out work in or on a wall, comprising a main handle for gripping the tool, a trigger for actuating at least one function of the tool, and an elongated member intended to form a hole in the wall or to be inserted into a hole in the wall, said tool being equipped with a feeler intended to bear on the wall, characterized in that said feeler is located at a free longitudinal end of a piston rod of a linear actuator of the tool, and in that the tool further comprises actuator control means, which are configured to vary the output length of the said piston rod during operation of the tool. The actuator assists the user of the tool by imposing a predetermined distance between the tool and the wall, which results in a given depth of drilling a hole or insertion of the organ in the hole. In the context of the present invention, this distance is variable and is modified during a use phase of the tool, to control the advancing speed of the tool vis-à-vis the wall and / or the speed of recoil of the tool vis-à-vis the wall. In the case of a perforator for example, the control by the tool of the advancing speed of the tool (which corresponds to the retraction speed of the piston rod of the actuator), makes it possible to impose on the user a predetermined rate of piercing the wall. In the case of a resin injection tool for example, the control by the tool of the advancing speed of the tool (which corresponds to the retraction speed of the piston rod of the actuator), may make it possible to impose on the user a predetermined speed of cleaning the hole, and control by the tool of the speed of recoil of the tool (which corresponds to the deployment speed of the piston rod of the actuator ), makes it possible to impose on the user a predetermined speed of resin injection into the hole. The tool thus makes it possible to inject the resin at an optimal speed and to ensure the injection of an optimal quantity of resin. The tool according to the invention may comprise one or more of the following characteristics, taken separately or in combination with each other: the tool is a perforator for the formation of said hole, the tool is an injection tool in the hole, the tool carries an elongated nozzle for insertion into said hole, and configured to inject resin and / or air into said hole or to brush at least one internal surface of said hole, - said control means are configured to decrease the output length of the piston rod at a first speed during a first phase of operation of the tool, and to increase the output length of the rod of a piston according to a second speed during a second phase of operation of the tool, - said first phase of operation is a phase of cleaning by injecting air into the hole and / or brushing at least one hole wall, and the second phase of operation is a resin injection phase in the hole, 3035011 - said actuator extends substantially parallel to said member, - the tool comprises at least one position sensor of said piston rod and / or at least one contact sensor associated with said probe, the tool comprises a first motor or geared motor driving in rotation of said member, a second motor or geared motor for operating a compressor for generating of compressed air, a third motor or gear motor for actuating means for preparing and injecting the resin, a fourth motor or geared motor for actuating the actuator, - said actuator is located on one side lateral or lower of the tool, - said member and said actuator extend in a same substantially vertical or horizontal plane, in conventional condition of use of the tool, and - said actuator comprises a substantially cylindrical portion mounting a removable secondary handle. The present invention also relates to a method for injecting chemical sealing resin into a hole of a wall, by means of a single tool as described above, characterized in that it comprises the steps of: the piston rod of the actuator being in the extended position, placing said probe bearing against said wall and inserting said longitudinal member into said hole or presenting it at the entrance of the hole, - gradually decreasing the output length of the rod of piston according to a first speed, so that said member penetrates progressively into said hole, - stop the progression of said member in the hole by maintaining the piston rod in a given retracted position, - gradually increase the output length of the piston rod at a second speed and injecting resin into the hole by means of said member, so that said member gradually emerges from said hole while injecting - Stop the resin injection and wait until the piston rod is in an extended position, to move the probe away from the wall. The method may comprise at least one of the following additional steps: rotating the member, injecting air into the hole by means of said member, brushing at least one internal surface of the hole via said member. According to a third aspect, the invention proposes a removable handle for a portable tool for carrying out work in or on a wall, comprising a first gripping portion which has an elongated shape and which is configured to be gripped by a hand of a user, and a second mounting portion on said tool which has a slotted annular shape and which has a slot configured to allow mounting / disassembly of the handle by passing an element of the tool through said slot, characterized in that said slit is located at said first portion and extends substantially throughout the longitudinal dimension of said first portion to define two longitudinal handle portions, and in that the handle is configured so that a spacing of said longitudinal portions causes an enlargement of the slot and that a approximation of said longitudinal portions cause a narrowing of the slot. The handle is intended to be held on the element of the tool by clamping the second mounting part on the element, and more particularly by reducing the internal diameter of this second part so that it adopts the outer diameter of the element. 'element. According to the invention, this reduction in diameter, which results from a narrowing of the slot, is caused by a simple approximation of the handle portions. It is therefore enough for a user to grip with one hand the first part of the handle and to bring the handle portions closer with this hand, by tightening the fist, to immobilize the handle on the element of the tool. .

Advantageously, the handle according to the invention is devoid of screws or the like, in order to fix it. In a particular embodiment of the invention, the handle has a mass 30% lower than an equivalent handle of the prior art, and a cost divided by three compared to the previous handle. The handle according to the invention may comprise one or more of the following features, taken alone or in combination with each other: said second mounting part defines a mounting hole of said element, which has a generally circular shape of axis B of revolution, - said second part comprises at its inner periphery at least one protruding anti-rotation element configured to cooperate with a complementary means of said element, - said slot has a substantially radial orientation with respect to said axis, - the handle has a first longitudinal plane of symmetry passing substantially through said axis B, - the handle has a second longitudinal plane of symmetry substantially perpendicular to said axis B, - in the free state without constraint of the handle, said slot has an angular extent around said B axis which is between 5 and 20 °, - said longitudinal handle portions are substantially identical; each of said longitudinal handle portions comprises a lateral positioning stop at each of its longitudinal ends, configured to cooperate with the hand of the user, the handle is formed in one piece, and the handle is made of a material elastically deformable such as elastomer. The present invention also relates to a portable tool for performing work in or on a wall, comprising a main handle for gripping the tool, an actuating trigger for at least one function of the tool, and an element elongate shape for forming a hole in the wall or to be inserted into a hole in the wall, characterized in that the tool is further equipped with a handle as described above. The tool according to the invention may comprise one or more of the following characteristics, taken separately or in combination with each other: the tool is a perforator for the formation of said hole, the tool is an injection tool sealing resin in said hole. the second part of the handle is mounted on a ring of the tool, which comprises at least one receiving recess of the said projecting element of the second part BRIEF DESCRIPTION OF THE FIGURES 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 nonlimiting example and with reference to the accompanying drawings, in which: - Figure 1 is a very schematic view showing successive steps of A chemical sealing resin injection operation in a hole of a wall, according to the prior art to the present invention, - Figure 2 is a schematic perspective view of a chemical sealing resin injection tool according to a first embodiment of the invention, seen from the side, - Figure 3 is a schematic perspective view of the tool of Figure 2, seen from above, - Figure 4 is a schematic perspective view of the tool of FIG. 2, without part of its case, FIG. 5 is a schematic perspective view of an element of the case of the tool of FIG. 2, FIG. 6 is a schematic perspective view of the tool of FIG. 2, without its housing, FIG. 7 is a schematic perspective view of the tool of FIG. 2, seen from the front, FIG. is a view similar to that of FIG. 7, without certain parts, to visualize the dynamic mixer; FIG. 9 is a diagrammatic view in perspective and on a larger scale of the dynamic mixer of the tool of FIG. FIG. 10 is a schematic perspective view of the nozzle and the dynamic mixer of the tool of FIG. 2, viewed from the rear; FIG. 11 is a schematic perspective view of the nozzle of the tool of FIG. , seen from the rear, - Figure 12 is a schematic perspective view of the nozzle of the tool of FIG. 2, seen from the front, and shows its end cap, FIG. 13 is another schematic perspective view of the nozzle of the tool of FIG. 2, seen from the front, without its endpiece. 14 is a schematic perspective view of the tool of FIG. 2, without its nozzle, viewed from the front, FIG. 15 is a diagrammatic view in longitudinal section of the tool of FIG. FIG. 16 is a partial schematic perspective view of the tool of FIG. 2, without certain parts, FIG. 17 is a partial schematic perspective view of resin preparation and injection means of FIG. FIG. 18 is a schematic perspective view of a drive and air supply member of the dynamic mixer of the tool of FIG. 2, FIGS. 19a and 19b are FIGS. schematic perspective views of an actuator of the tool of Figure 2, and represent two positions of its piston rod, resp Figs. 20a and 20f are schematic perspective views of the tool of Fig. 2, and show steps of a method of injecting resin into a hole of a wall, 3035011 - Fig. 21 is a schematic perspective view of a chemical sealing resin injection tool according to an alternative embodiment of the invention, seen from the side, - Figure 22 is a schematic perspective view of the tool of Figure 21 equipped of a removable secondary handle according to one aspect of the invention, - Figure 23 is a schematic perspective view on a larger scale of the handle of Figure 22, and - Figure 24 is a schematic perspective view of a ring of a tool. DETAILED DESCRIPTION FIGS. 2 to 20f show a first embodiment of a tool 30 according to the invention for injecting chemical sealing resin into a hole in a wall. Figures 1 to 19b will be used in the following to illustrate the different parts of the tool 30 and Figures 20a to 20f will be used to illustrate a method of using the tool, i.e. resin injection into a hole in a wall. The tool 30 is portable and has a general gun shape. It comprises a main handle 32 equipped with a trigger 34 for actuating at least one function of the tool. The tool 30 comprises a housing 36 having a generally L-shaped shape and comprising, in use condition, that is to say when an operator or user holds the tool by its handle 32 and injects resin into a hole extending substantially horizontally, a first longitudinal portion 36A horizontal and a second longitudinal portion 36B vertical and defining said handle 32. The housing 36 further comprises, in front of the handle 32, a third longitudinal portion 36C substantially parallel to the second part 36B. The second and third portions 36B, 36C extend downwardly from the first portion. Finally, the housing 36 comprises at the junction between the first and second portions 36A, 36B a slightly oversimposed fourth portion 36D, particularly in width, with respect to the other 3035011 parts. The different parts 36A-36D of the housing 36 extend substantially in the same vertical plane. The housing 36 here comprises two elements or parts: a main body 36a shown alone in Figure 5 and a lid 36b attached and fixed on the body 36a, for example by means of screws. The lid 36b defines all or almost all of a lateral outer wall (here left) of the tool. This cover 36b defines lateral outer walls of the first, second, third and fourth longitudinal portions 36A-36D of the housing presented in the foregoing. The body 36a defines the other external surfaces of the tool, and in particular all or almost all of the other external lateral wall (here right) of the tool, as well as a front wall 36aa of the tool and in particular the first longitudinal portion 36A of its housing 36, the front 36ab and rear 36ac walls of the third portion 36C of the housing, and the front 36ad and rear 36ae walls of the second portion 36B or handle 32 of the housing. The lower ends of the second and third parts 36B, 36C of the housing are interconnected and comprise means for fixing a removable battery 38, power supply of the tool 30. As can be seen in FIG. 36a of the housing 36 defines receiving housing of several elements of the tool. The third portion 36C of the housing here defines a housing 40 for receiving a motor or geared motor 42 for driving a compressor 44 for the generation of compressed air. The geared motor 42 extends between the front walls 36ab and rear 36ac above. It is electrically connected to at least one control electronic board 46, itself electrically connected to the battery 38. The second part 36B of the housing here defines a housing for receiving a portion of the trigger 34 and a housing of 48 receiving a potentiometer 50 carrying a wheel 52 accessible by the user through a window 53 of the handle 32. The potentiometer 52 is connected to the electronic card 46 and allows to vary the resin injection speed by 3035011 17 default - during an initialization operation, which will be described in detail in the following. The first portion 36A of the housing here defines a plurality of recesses 54, 56, 58. The recess 54 is situated on one (right) side of the housing 36 and extends over substantially the entire longitudinal dimension of the first portion 36A as well as the fourth part 36D of the housing. This housing 54 receives an electric linear actuator 60, visible in Figures 19a and 19b. The housings 56 and 58 are located on the other side (here left) of the housing 36 and are located longitudinally one 58 behind the other 56. The rear housing 58 is located substantially above the housing 40 and receives the compressor 44, or a gearbox or reduction 62 of mechanical connection of the output shaft of the geared motor 42 to the rotor of the compressor 44. The front housing 56 receives a motor or geared motor 64 for the rotational drive a dynamic mixer 66, visible in Figures 8 to 10. The geared motor 64 extends behind the aforementioned front wall 36aa and is electrically connected to the electronic card 46. The fourth portion 36D of the housing defines, in addition said housing receiving a portion of the actuator 60, housing 68, 70, respectively lower and upper. The lower housing 68 receives a motor or geared motor 72 used for the preparation and injection of the resin. It is electrically connected to the electronic card 46. The upper housing 70 receives the electronic control board or cards 46, which are accessible by disassembly of an upper cover 74 of the housing 36. In the example shown, the cover 74 is flat and has a substantially rectangular shape. It carries a switch 75a for starting the tool, a switch 75b for selecting from two operating modes of the tool, an "initiation" mode and an "injection" mode, and possibly a control screen 75c. The first portion 36A of the housing 36 is open at its upper end and receives a member 76 for receiving at least one cartridge for 3035011 18 the preparation of the resin, and here two cartridges 78a, 78b. The cartridges extend parallel to one another and extend in the same substantially horizontal plane, in a conventional condition of use. The cartridge 78a comprises a polymerizable resin based on at least one monomer and the cartridge 78b comprises a hardener or crosslinking agent (or vice versa), the mixture of these two components causing the polymerization of the resin and its hardening. The cartridges 78a, 78b are consumables and the member 76 is open on top to facilitate the assembly / disassembly of the cartridges. Each cartridge 78a, 78b comprises a cylindrical body whose one end (here before is closed) and whose opposite end (rear) has a bottom slidably mounted within the cylindrical body. The front ends of the cartridges are supported on a front wall 76a of the member and comprise a common end piece 80 of the components. The rear ends of the cartridges are located in front of the fourth portion 36D of the housing 36 and receive circular heads of pistons whose rods 82 pass through the fourth portion 36D of the housing, passing between the housing 68, 70, and extend towards the rear of the tool, particularly when the pistons are in the fully extended position, as shown in Figures 2 to 4. The pistons are electrically actuated by means of the geared motor 72. The output shaft of the geared motor 72 carries a pinion which is geared with a rack 73 whose rear end is connected to a plate 75 secured to the two rods 82. A third rod 82 ', parallel to the rods 82 and integral with the plate 75 is visible in the drawings. It serves as a guide during the translation of the assembly formed by the rods 82, the rack 73 and the plate 75. The tool 30 thus comprises three separate motors or geared motors 42, 64, 72, one for actuation. compressor 44, one for the actuation of the dynamic mixer 66 and the last for the actuation of the pistons for preparing and injecting resin. It will be seen in the following that the tool comprises another motor or geared motor.

As can be seen in FIGS. 15 to 18, the geared motor 64 drives the dynamic mixer 66 via a driving or connecting member 84. The connecting member 84 has an elongated shape and is extends along the axis A of rotation of the output shaft 86 of the geared motor. The connecting member 84 comprises a rear longitudinal end 84a configured to be connected to the output shaft 86 and secured in rotation to the shaft 86. This end 84a here has a hexagonal cross section and is engaged in a bore 86a of complementary shape of the output shaft 86. The connecting member 84 comprises a front longitudinal end 84b configured to be connected to the dynamic mixer 66 and rotatably connected thereto. This end 84b also has a cross-section hexagonal shape and is engaged in a rear end portion of complementary shape of a bore 66a of the mixer 66. The connecting member 84 comprises, between its ends 84a, 84b, two cylindrical portions 84c surrounded by bearing bearings 88, here ball, which allow to center and guide the rotation of the member about the axis A. The bearings 88 are carried by a stator bushing 90 fixedly mounted in the housing 36. This bushing 90 is inserted into a hole 92 passing through said front wall 36aa of the housing, which is visible in FIG. 5. The connecting element 84 comprises, between its cylindrical portions 84c, an intermediate cylindrical portion 84d having an orifice 94 extending substantially perpendicularly to the axis A. This orifice 94 is through and thus opens on two diametrically opposite sides of the intermediate portion 84d. The connecting member 84 further comprises an internal bore 96 which extends along the axis A from its free front end to the right of the orifice 94. The bore 96 and the orifice 94 are thus in fluid communication. As can be seen in FIG. 16, the bushing 90 comprises a connection port 98 at one end of a flexible air circulation hose 100 whose opposite end is connected to the air outlet of the compressor 44. Hose 100 is here represented in dashed lines. The bushing 90 extends around the intermediate portion 84d of the element 84 and defines therewith an annular cavity 102 delimited axially by the bearings 88. The port 92 opens into this cavity 102 which is thus supplied with air by the compressor 44. The components of the cartridges 78a, 78b are brought to the dynamic mixer 66 by means of a bent duct 104, substantially S-shaped. This duct 104 comprises an end, here upper 104a, connection to the tip 80 of the cartridges. A nut 106 is mounted prisoner on the end 104a of the duct 104, which opens towards the rear, and is screwed on an external thread of the end piece 80 in order to clamp the end 104a on the end piece 80, and establishing a tight connection between these elements. The conduit 104 comprises a lower end 104b for connection to a nozzle 110 of the tool 30, for the injection of the resin. This end 104b has an external thread and opens out towards the front. This end is centered on the axis A and receives the dynamic mixer 66. The mixer 66 comprises a longitudinal body 66b of axis A which carries at its periphery a plurality of fins 66c for mixing the components of the resin. The body 66b is tubular and thus comprises an internal bore 112 which extends over the entire length of the body and which defines at its downstream end the aforementioned hexagonal section of the receiving portion of the front end of the body 84. As one see in Figure 14 in particular, the front end of the member 84 through an orifice of a bottom wall of the conduit 104. The mixer 66 is housed in part in the lower end 104b of the conduit 104 and partly to the inside of a substantially cylindrical or frustoconical ring 114, which is attached to the end 104b of the duct. A nut 116 is mounted on the ring 114 and is screwed onto the thread of the end 104b for clamping the ring on the end 104b, and establishing a sealed connection between these elements. The ring 114 comprises at its front end an orifice 118 traversed by the front portion of the mixer 66.

The duct 104 may be equipped with at least one seal at each of its ends 104a, 104b, such as, for example, O-rings. As can be seen in FIG. 15, the body 66b of the mixer 66 defines with the ring 114 an annular flow vein of the resin being mixed. The mixer 66 comprises at its front end two tubular elements 120 for connection to the nozzle 110 and the resin supply of this nozzle. The elements 120 are substantially identical and diametrically opposite to the axis A and receive the resin from the vein, which separates into two streams of material. The internal bore of the body 66b of the mixer 66 defines an axial passage of air flow from the compressor 44 and intended to supply the nozzle 110. The mixer 66 is here formed in one piece. As can be seen in FIG. 9, the front air outlet end of the bore 66a of the mixer 66 has a substantially circular cross section. This end is intended to be aligned with a channel 122 of similar shape or not of the nozzle 110. The tubular elements 120 have two planes of symmetry passing through the axis A and respectively horizontal and vertical. Each tubular element 120 has a substantially semicircular shape or half-disc in section and is shaped to be engaged in force in a conduit 124 of complementary shape to the nozzle 110. In the mounted position, the nozzle 110 is intended to be axial support on the front end of the body 66b of the mixer. The nozzle 110 of the tool is better visible in FIGS. 10 to 13. As is the case with the cartridges 78a, 78b, the nozzle 110 represents a consumable which must be replaced after one or more successive resin injection operations, due to the plugging of the nozzle by the cured resin after polymerization. In the example shown, the nozzle 110 generally comprises three elements: a body 126 of elongate rectilinear shape, an end piece 128 and brushing means 130.

The body 126 is formed of a single piece of plastic material, for example transparent. It can be formed by extrusion or injection-molding. It comprises here two internal longitudinal passages 124 of resin passage and an internal longitudinal channel 122 of air passage. The conduits 124 and the channel 122 extend over substantially the entire longitudinal dimension of the body and open at each of its longitudinal ends. The channel 122 extends to the center of the body and is traversed by the longitudinal axis of the body, which coincides with the aforementioned axis A when the nozzle 110 is mounted on the tool and in particular on the elements 120 of the mixer 66 This channel 122 here has in section a substantially parallelepiped shape here square. The ducts 124 extend on either side of the channel 124 and are diametrically opposed with respect to the axis A. As indicated above, they have a cross-sectional shape similar to that of the end pieces 120 so as to be able to fit the nozzle 110 on these tips. Each duct has a section in a substantially semicircle or half-disk shape. As can be seen in the drawings, the ducts 124 are separated from one another by a longitudinal space in the median part of which the channel 122 extends. The lateral parts of this space are open towards the outside and define longitudinal lateral grooves 132. These grooves 132 extend over the entire longitudinal dimension of the body 126. They each have a parallelepipedal shape - here square and are delimited by two lateral walls 132a substantially parallel and common to the ducts 124, and a bottom wall 132b common to the channel 122. The longitudinal edges of the side walls 132a of each groove 132, opposite the bottom wall 132b of this groove, are connected to two longitudinal flanges 134 which converge towards one another towards the outside of the nozzle 110. As seen in Figure 13, these grooves 132 are intended to receive the above brushing means, and in particular brushes 130. D In the example shown, the nozzle 110 carries two brushes 130 mounted 3035011 23 respectively in the grooves 132 of the body of the nozzle. Each brush 130 has a generally planar and parallelepipedal shape and is located at the front end of the nozzle 110. The brushes 130 are diametrically opposed and coplanar. They each comprise a radially inner portion, relative to the axis A, inserted in force or slidably engaged in the grooves 132 and retained radially therein by the flanges 134, by abutment and / or nip. Each brush 130 may be formed by a pad or block of flexible material. In this case, the flanges 134 can cooperate with longitudinal ribs provided on the brushes to ensure their retention in the grooves 132. Alternatively, each brush 130 comprises a plurality of bristles which can be secured to one another by means of a common support for pinching ends of the bristles. Alternatively, the support can be overmolded on the bristles or glued to them. The bristles may be of plastic material such as polyamide or metal material such as steel. In this case, it is the support itself which is slidably or forcefully inserted in the grooves and which can cooperate with the flanges 134 to ensure the retention of the brushes 130 in the grooves 132. The rotation of the nozzle 110 allows the brushes 130 to scan the inner cylindrical surface of the hole of the wall in which the nozzle is engaged. The end piece 128 is attached and fixed on the front end of the body 126, for example by simple interlocking and cooperation of shapes. It comprises a disk-shaped front wall 128a and connected at its outer periphery to a rear cylindrical rim 128b. The flange 128b is intended to extend around the front end of the body 126 and may be force-fitted on this end. The flange 128b includes a slot 136 at each groove 132 of the body, so as to receive a portion of the corresponding brush 130. The front wall 128a of the nozzle 128 comprises three openings 138a, 138b and 138c, which are traversing in the longitudinal direction. A first opening 128a is located substantially in the center of the wall 128a and aligned with the axis A, or close to this axis, so as to be in fluid communication with the channel 122 of the body 126 of the nozzle 110. 128a is substantially circular. The other openings 128b, 128c are located on either side of the opening 128a and are diametrically opposite to the axis A. They have semicircle or half-disk shapes, similar to those in section of the conduits 124, and are positioned around the axis A so as to be in fluid communication with the conduits 124, respectively. The front wall 128a further comprises a rib 130 'projecting forwards. The rib 130 'has a substantially radial orientation relative to the axis A. It has a length or radial dimension corresponding substantially to the radius of the nozzle 110, its radially inner end being located at the axis A. The rotation of the nozzle 110 causes a helical movement of the air inside the hole, which tends to be expelled towards the exit of the hole by bringing with it the dust initially present in the hole. This rotation of the air is in particular caused by the scoop effect caused by the rotation of the rib 130 'and the brushes 130. Referring now to FIGS. 19a and 19b which show the actuator 60 disassembled the rest of the tool 30. The actuator 60 comprises a cylinder 60a inside which is slidably mounted a piston rod 60b whose free end, opposite the cylinder 60a, carries a probe 140 for bearing on the wall with the hole. The probe 140 is shown in dashed lines in Figures 19a and 19b and is visible in Figures 2 to 4 in particular. The probe 140 may be made of a flexible or elastic material, such as elastomer, to facilitate the positioning and holding in position of the tool on the wall and to dampen any shocks. Preferably, the probe 140 is associated with a contact sensor connected to the electronic card 46. During an injection operation, the probe 140 must 3035011 be in permanent contact with the wall. If the electronic card 46 receives a piece of information from the probe support defect sensor on the wall, it can decide to continue the air injection and / or resin injection steps, or preferably to put them on hold, these steps being taken again only when the probe is put back against the wall. The actuator 60 is linear, that is to say that the piston rod 60b has a rectilinear deployment stroke, and is movable between a first extended position shown in Figure 19a, and a second retracted position shown in Figure 19b. The actuator 60 is also electrical because it is electrically powered by a motor or geared motor 142, independent of the other three geared motors mentioned above. This geared motor 142 is electrically connected to the electronic card 46 of the tool. The electronic card 46 includes all the elements necessary for controlling the electrical equipment of the tool 30 and in particular the motors or geared motors. It comprises at least one microprocessor configured to control the actuator 60, and in particular the power supply of its geared motor 142, so as to define a speed V1 of retraction of the piston rod (passage of the position of the FIG. 19a at the position of Fig. 19b), which may be different from the exit or deployment speed V2 of the piston rod 60b (going from the position of Fig. 19b to the position of Fig. 19a). As will be described in more detail in the following, the speed V1 is determined to optimize the brushing in the hole and the speed V2 is determined to optimize the injection of the resin into the hole. The microprocessor of the electronic card 46 is preferably configured to control the pistons of the means for preparing and injecting the resin, so that their rods 82 have a predetermined speed of movement V3.

Advantageously, the injection speed of the resin, which is a function of the speed V3 of displacement of the rods 82, is slaved to the speed V2 of deployment of the piston rod 60b. Preferably, the electronic card 46 is connected to a room temperature sensor. The card 46 therefore receives information relating to the outside temperature and can adapt the speed V3 as a function of this temperature, to take into account the influence of this temperature on the viscosity of the resin. The actuator 60 preferably comprises a position sensor of its piston rod 60b (such as a contactor), so that the electronic card 46 can deduce the depth of the hole and take into account the latter parameter to determine the optimum amount of resin to be injected and accordingly control the gear motor 72. Reference is now made to Figs. 20a to 20f which show steps of a resin injection process using the tool 30. Prior to the steps illustrated in Figures 20a and following, it is necessary to drill a hole 146 in a wall 144, by means of a perforator for example. The hole 146 has for example a diameter of the order of 20mm for a length of the order of 20cm. It is also advisable to proceed to a preliminary step of assembling the consumables on the tool 30, namely the cartridges 78a, 78b, in the member 76, and the nozzle 110 on the elements 120 of the mixer 66. It is then necessary to proceed to an initiation phase, the operator starting this phase by starting the tool, by means of the switch 75a, then putting the switch 75b in the "initiation" position. This phase is intended to fill the resin nozzle 110. Upon activation of this phase, the electronic card 46 of the tool controls the geared motors 64, 72 so that the components leave the cartridges 78a, 78b and are conveyed through the conduit 104 to the mixer 66, which mixes them and it forces them into the elements 120 and into the ducts 124 of the nozzle 110. The resin is thus mixed before being injected into the nozzle, which makes it possible to reduce its viscosity and to facilitate its flow in the nozzle. The initialization step is complete when resin flows through the openings 138b, 138c of the tip end 128 of the nozzle. The operator can then put the switch 75b in the "injection" position, which stops the actuation of the motors of the tool. A first step of the method, illustrated by FIG. 20a, consists in positioning the tool 30 in front of the wall 144 comprising the hole 146, to put the probe 140 of the actuator 60 in abutment against the wall 144, and to align the axis of the nozzle 110 on the axis of the hole 146. This step, as well as the following steps, are performed manually, an operator directly manipulating the tool 30 by holding it by its handle 32. A next step is to press the trigger 34 of the handle 32 of the tool for starting a resin injection operation in the hole 146. During this operation, the electronic card 46 of the tool controls: - the geared motor 42 for the generation compressed air (arrows 150); the compressed air leaves the compressor and is conveyed by the pipe 100 to the port 98 of the sleeve 90; this air feeds the cavity 102 and enters the bore 96 of the connecting member 84 through the orifice 94; this air then flows along the member 84 and into the bore 66a of the mixer 66 and is then injected into the internal channel 122 of the nozzle 110; the air is expelled at the front end of the nozzle 110 through the opening 138a of the tip end 128 of the nozzle; the volume of air expelled may be of the order of 10L per injection operation; the ratio between the volume of air expelled and the volume of the hole 146 is preferably greater than 1000, and for example of the order of 1600, the geared motor 142 for the progressive retraction of the piston rod 60b actuator 60 (arrow 152); the operator is supposed to hold the probe 140 against the wall 144; it is thus understood that as the piston rod 60b of the actuator 60 returns, the nozzle 110 enters the hole 146 more and more deeply; the aforementioned speed V1 retraction of the rod 60b and determines the insertion speed of the nozzle 110 in the hole 146, and 3035011 28 - the geared motor 64 for the rotation of the nozzle 110 (arrow 148) for example at a speed of 450 rpm; the rotation being transmitted to the nozzle via the connecting member 84 and the mixer 66; the brushes 130 of the nozzle 110 have their radially outer ends located on a circumference centered on the axis A which preferably has a diameter at least equal to and possibly greater than the internal diameter of the hole 146; the rotation of the nozzle 110 causes the rotation of the brushes 130 and thus a brushing of the inner cylindrical surface of the hole 146. During the step of Figure 20b, there is therefore simultaneously air injection into the hole 146 (arrows 150) and brushing the inside of the hole (arrow 148), which makes it possible to clean the inside of the hole and remove any dust and debris there. The combination of the rotation of the nozzle 110 and the advancement of the nozzle in the hole allows to sweep the inside of the hole by helical movements. The rib 130 'and the brushes 130 are subjected to these helical movements, which will generate a helical movement of the air which will facilitate its expulsion outside the hole, carrying with it the dust and debris. The insertion of the nozzle 110 into the hole 146 is continued until the tip end 128 of the nozzle bears against the bottom of the hole or, preferably, until the piston rod 60b of the actuator 60 is fully retracted (Figure 20c). This situation allows the electronic card 46 of the tool to know the depth (minimum) of the hole. Insofar as the nozzle 110 has abutted on the bottom of the hole by its end piece 128, the information coming from the position sensor of the piston rod of the actuator 60 makes it possible to determine the depth of the hole, by subtracting the length remaining piston rod to the length of the rod when fully extended. In the case where the piston rod of the actuator had to be fully retracted, the electronic card 46 can deduce that the depth of the hole is at least equal to the deployment stroke of the piston rod of the actuator. The knowledge of the depth of the hole by the electronic card 46 allows in particular to adjust the amount of resin to be injected in the next step. The injection of resin into the hole 146 can begin at the next step shown in Figure 20d. During this step, the electronic card 46 of the tool controls: - the geared motor 42 in order to stop or not the generation of compressed air, - the geared motor 142 for the progressive deployment of the piston rod 60b of the actuator 60 (arrow 154); the operator is supposed to hold the probe 140 against the wall 144; it is thus understood that as the piston rod 60b of the actuator 60 unfolds, the nozzle 110 gradually leaves the hole 146; the aforementioned speed V2 of deployment of the rod 60b thus determines the output speed of the nozzle 110 of the hole 146, the geared motor 64 for the purpose of rotating the nozzle 110 (arrow 148), for example at a speed of 450 rpm; the rotation being transmitted to the nozzle via the connecting member 84 and the mixer 66, and the geared motor 72 for actuating the rack 73 and rods 82; because of the aforementioned initialization phase, components have already been introduced into the conduit 104 and the resin has already been mixed by the mixer 66 and introduced into the nozzle 110, which is therefore full of resin; the actuation of the geared motor 72 therefore causes a quasi-immediate output of the resin from the beginning of retraction of the piston rod 60b of the actuator 60; the speed of injection of the resin into the hole (which depends on the speed V3 of displacement of the rods 82) is slaved to the retraction speed V2 of the piston rod 60b so that an optimal quantity of resin is injected into the the hole. Insufficient injection speed of the injected resin would lead to a harmful presence of air bubbles trapped in the hole, while a too high speed could lead to a contamination of the brushes 130 of the nozzle 110. In case there is would have a sudden change in the rate or rate of resin injection into the hole, the electronic board 46 can adjust the control parameters of the geared motor 72 to maintain a proper injection. The relationship between the injected resin flow Q and the speeds V1 and V3 is: Q = V3 * S3 = V2 * S, with S and S3 being respectively the section of the hole 146 and the equivalent section of the cartridges 78a, 78b. Preferably, the speed V2 must be adjusted so that V2 = (V3 * S3) / S. The resin injection step is continued at least until the end tip 128 of the nozzle 110 is located substantially mid-depth of the hole 146 (Figure 20e). Achieving this mid-depth can easily be deduced by the electronic card 46, simply dividing by two the depth of the hole calculated in the previous step. The next step is then to continue the exit of the nozzle 110 from the hole 146, continuing the deployment of the piston rod 60b to its fully extended position, in which the nozzle 110 is completely extracted from the hole 146 (FIG. 20f ). During this exit phase of the nozzle, air can be injected into the hole if necessary. The electronic card 46 then controls the stopping of the geared motors and waits for a new order from the operator, by means of the trigger 34, to launch a new injection operation. The tool 30 can be configured so that a permanent pressure on the trigger is necessary for the realization of the whole process, or that a point pressure is sufficient to initiate the process that continues as a new pressure on the trigger is performed, unless of course the end of the last step of the process occurs before this new pressure on the trigger. In the first case mentioned above, the electronic card 46 can stop the operation of the geared motors, which would not be resumed until a pressure on the trigger is again performed. Referring now to Figures 21 to 23 which show an alternative embodiment of the tool 230 according to the invention. This tool 230 generally comprises all the characteristics of the tool 30 described above. It differs only in the following points.

The tool 230 comprises at its upper and rear end a hoop 390 forming a hooking means of the tool. The electric linear actuator 260 has the same function as the aforementioned actuator 60. Instead of being placed next to the nozzle and in a same substantially horizontal plane, as in the aforementioned case, the actuator 260 is here located under the nozzle 310 and in a same substantially vertical plane in a conventional condition of use ( nozzle 310 horizontal). In Figures 21 to 23, the actuator 260 is shown with its piston rod not visible because completely retracted. In the example shown, the body 260a of the actuator 260 comprises an outer cylindrical surface on which is removably mounted a secondary handle 400 (Figure 22). According to one aspect of the invention, the handle 400 includes a first grasping portion 400a which is elongated and configured to be gripped by a hand of a user, and a second mounting portion 400b on the tool which has a split annular shape (Figure 23). The second portion 400b has a slot 402 configured to allow the assembly / disassembly of the handle 400 on the cylinder 260a of the actuator 260, by passage of the cylinder through the slot 402. The slot 402 is located at the first part 400a and extends substantially over the entire longitudinal dimension of this first portion to define two longitudinal portions of handle 400aa and 400ab, respectively lower and upper in the example shown. The handle 400 is configured so that a spacing of the longitudinal portions 400aa, 400ab cause an enlargement of the slot 402 and that a reconciliation of these longitudinal portions cause a narrowing of the slot. When the handle 400 is mounted on the cylinder 260a of the actuator 260 and its second portion 400b surrounds the surface of the cylinder 260a, it is sufficient for the user to grip the first portion 400a of the handle with the hand and move closer with this hand. portions 400aa, 400ab, by clenching the fist, 3035011 32 to obtain the immobilization of the handle on the cylinder 260a. This immobilization is obtained by simply clamping and friction of the second portion 400b on the surface of the cylinder 260a. In the example shown, the second portion 400b defines a mounting hole of the cylinder 260b, which has a generally circular shape of axis B of revolution. The inner diameter of this second portion 400b is preferably greater than the outer diameter of the cylinder 260b, when the handle is in the free state without stress. In this free state without constraint of the handle, the slot preferably has an angular extent about said axis B which is between 5 and 20 °. The slot 402 here has a substantially radial orientation relative to the axis B. The handle 400 has a first longitudinal plane P1 of symmetry passing substantially through the axis B. It has a second longitudinal plane of symmetry P2 substantially perpendicular to the axis B. The longitudinal portions 400aa, 400ab are substantially identical in the example shown. Each of these portions comprises a lateral positioning stop 400c at each of its longitudinal ends, which is configured to cooperate with the hand of the user. The handle 400 is preferably formed in one piece, for example in an elastically deformable material such as elastomer. It is in this case intended to deform elastically during the manual approximation portions 400aa, 400ab. Although the handle 400 is here mounted on a resin injection tool, it could be mounted on a perforator, for example just behind or around its mandrel for fixing a drill bit. The perforator may comprise, behind or around the mandrel, a ring 410 as shown in Figure 24, integral in rotation with the mandrel. This ring 410 comprises at its periphery at least one orifice or recess 412 in which is intended to be engaged a protruding element of a removable handle as shown in Figure 23. This protruding element may be a tooth 414 's extending substantially radially inwardly (in the direction of the B-axis) from the inner periphery of the second portion 400b of the handle, as shown in broken lines. The cooperation by engagement of the tooth 414 of the handle in the hole 412 of the ring 410 of the perforator, can provide a function of indexing the handle and / or anti-rotation function. In the latter case, it allows a user to oppose the torque transmitted during a locking of the mandrel during a drilling. It should be noted however that in the absence of cooperation between one or more teeth of the handle and one or more orifices of the ring, the frictional forces between the handle and the ring could be sufficient to provide the anti-rotation function.

Claims (18)

REVENDICATIONS1. Nozzle (110,310) for a chemical sealing resin injection tool (30,230) into a hole (146) of a wall (144), said nozzle having a body (126) of elongate shape and including a longitudinal end of connection to said tool, said body comprising at least one internal longitudinal duct (124) of resin passage, characterized in that it comprises means (122, 130, 138a) for cleaning said hole by brushing and / or injection air. The nozzle (110, 310) of claim 1, wherein said body (126) comprises at least one internal longitudinal channel (122) for air passage. 3. Nozzle (110, 310) according to the preceding claim, wherein said body (126) comprises a single channel (122) for air passage which is traversed by the longitudinal axis (A) of the nozzle. 4. Nozzle (110, 310) according to the preceding claim, wherein it comprises at least two conduits (124) resin passage evenly distributed around said longitudinal axis (A). 5. Nozzle (110, 310) according to the preceding claim, wherein said two ducts (124) define between them a longitudinal space of which a median portion is occupied by said single channel (122) and the two side portions are at least partly recesses and preferably define external longitudinal grooves (132) of said body. 6. Nozzle (110, 310) according to one of claims 2 to 5, wherein it comprises an end piece (128) attached to the longitudinal end of the body (126) opposite to said connection end, this endpiece having at least one air ejection port (138a) in fluid communication with said at least one channel (122), and at least one resin ejection port (138b, 138c) in fluid communication with said at least one led (124). 3035011 35 7. Nozzle (110, 310) according to one of the preceding claims, wherein it comprises means (130) for brushing at least one inner surface of said hole (146). 8. Nozzle (110, 310) according to the preceding claim, wherein said brushing means comprise at least two external brushes (130) independent. The nozzle (110, 310) according to claim 7 or 8, wherein said brushes (130) are diametrically opposed to a longitudinal axis (A) of the body. 10. Nozzle (110, 310) according to one of claims 7 to 9, wherein said brushes (130) are respectively mounted in longitudinal grooves (132) of said body (126). 11. Chemical sealing resin injection tool (30, 230) in a hole (146) of a wall (144), configured to be equipped with a nozzle (110, 310) according to one of the preceding claims. , characterized in that it comprises means (72, 73, 82, 104, 66) for injecting the resin into said at least one conduit (124) and: - means (42, 62, 22, 100, 90, 84, 66) for injecting air into said hole, and / or - means (64, 84, 66) for rotating the nozzle for brushing at least one inner surface of said hole. 12. Tool (30, 230) according to the preceding claim, wherein said resin injection means comprises a rotary mixer (66) which is configured to be secured in rotation to said connecting end of the body (126) of the nozzle (110). 13. Tool (30, 230) according to the preceding claim, wherein said mixer (66) comprises a longitudinal first end of connection to a longitudinal end of said at least one channel (122) or conduit (124), said mixer comprising a first airflow bore (66a), which opens at said first longitudinal end for supplying air to said at least one channel. 3035011 36 14. Tool (30, 230) according to the preceding claim, wherein the mixer comprises at a second opposite longitudinal end a connecting portion to a drive member (84), itself connected to an output shaft (86). an engine or geared motor (64), said drive member having a second air flow bore (96) in fluid communication with said first bore (66a). 15. Tool (30, 230) according to the preceding claim, wherein said drive member (84) comprises an outer annular groove (102) in fluid communication with said second bore (96), said drive member being at least partially surrounded by a stator bushing (90) which closes said groove and which comprises at least one substantially radial orifice (98) opening into said groove and configured to be connected to an air outlet of an integrated compressor (44) to the tool, for example by means of a hose (100) flexible. 16. A method of injecting chemical sealing resin into a hole (146) of a wall (144) by means of a single tool (30, 230) equipped with a nozzle (110, 310) according to the one of claims 1 to 10, characterized in that it comprises the steps of: - inserting the nozzle into the hole, - injecting air into the hole by means of the nozzle and / or rotating the nozzle in to brush with the nozzle at least one inner surface of the hole, - inject resin into the hole by means of the nozzle. 17. Method according to the preceding claim, comprising the steps of: - controlling the gradual advance of the nozzle in the hole and / or the gradual withdrawal of the nozzle from the hole, by cooperation of support means of the tool with said wall. The method of claim 16 or 17, wherein it comprises the steps of: - rotating the nozzle, the nozzle being rotated during all subsequent steps of the process, 3035011 37 - starting the insertion of the nozzle in the hole for the purpose of brushing it, - inject air into the hole by means of the nozzle, - continue inserting the nozzle into the hole while continuing to inject air into the hole, - eventually, stop the injection of air into the hole, - inject resin into the hole, - start removing the nozzle from the hole while continuing to inject resin into the hole, - continue removing the nozzle to its exit from the hole, the injection of the resin being preferably stopped before the exit of the nozzle from the hole.