FR2776496A1 - Ferrule for gas evacuation pipe used for evacuating exhaust gas from automobiles being repaired in garages - Google Patents

Abstract

The ferrule (10) has a lever fitting (14), designed to fix it onto gas emission source (20), and a sleeve (12) designed to receive one of the ends of a breather pipe (13) whose other end is connected to a breather source. The lever fitting (14) is designed to occupy at least two positions, one called a 'locking' position, in which the ferrule is fixed onto the emission source (20) and an 'unlocked' position in which the ferrule is released from the emission source (20). A shutter (40-41) is fitted inside the sleeve (12) and is designed to occupy at least two positions, one called 'closed' in which the section of passage for the sleeve (12) is considerably reduced and an 'open' position in which the passage section is relatively large. The shutter (40) is controlled by the lever fitting (14) so that when the lever fitting is in the unlocked position, the shutter (40) is closed, and when the lever fitting is in the locked position the shutter (40) is open.

Description

"End piece for gas suction pipe, in particular exhaust gas from

  motor vehicles, and suction pipe equipped with such a nozzle "The present invention relates to a nozzle for gas suction pipe. Gas suction pipes are well known; they are generally flexible pipes of great length wound on a winder-unwinder; they are on one side connected to a suction source and, on the other, provided with a nozzle comprising fixing means adapted to fix them, by their

  nozzle, to a source of emission of the gases to be aspirated.

  Such pipes are for example used in garages for the evacuation of exhaust gases emitted by vehicles treated in these garages. The fixing means with which the endpiece is provided are designed to occupy at least two positions, a so-called locking position in which the endpiece is fixed to the emission source and a so-called unlocking position in which the endpiece is detached. the emission source; in this case, the suction pipe can then be separated and removed from the gas emission source, the suction pipe being no longer used; unfortunately, in this case, the suction source is then vented and this is detrimental, the suction flow rate can be lost.

  The object of the present invention is to avoid these drawbacks.

  According to the invention, a nozzle for a gas suction pipe comprising, on the one hand, fixing means adapted to fix said nozzle on a source of emission of the gases to be sucked and, on the other hand, a suitable sleeve to receive one end of a suction pipe, the other end of which is connected to a suction source, the fixing means being provided for occupying at least two positions, a so-called locking position in which the end piece is fixed on the emission source and a so-called unlocking position in which the end piece is detached from the emission source, is characterized in that a flap is provided inside said sleeve and adapted to occupy at least two positions, a so-called closed position in which the passage section offered by said sleeve is considerably reduced and a so-called open position in which said passage section is relatively large, said flap being comm andé by said fixing means so that, when the fixing means are in the unlocked position, said flap is in the closed position and, when the fixing means are in the position

  locking, said flap is in the open position.

  Thus, thanks to the invention, when the suction hose is not used,

  the suction source is isolated from the atmosphere.

  Advantageously, the tip also comprises a body of generally frustoconical shape, the portion of smaller diameter is extended according to a cylindrical collar by which said body is fitted on the end of said sleeve opposite to that which receives the end of the pipe. aspiration; the

  body is made of a flexible rubber-like material.

  Preferably, the fixing means are a clamp comprising a fixed jaw and a movable jaw; the clamp is carried by a frame consisting of the sleeve and of a U-shaped beam integral with the inner wall of the sleeve along which it extends at least partially, while outside of it extends inside the body to the vicinity of the opening towards the outside thereof, the end of the beam close to said opening constituting the fixed jaw of the clamp; the clamp comprises an operating lever on which are articulated, on the one hand, a straight lever and, on the other hand, a bent lever consisting of two arms forming an almost right angle, one of which carries the movable jaw and of which the 'other control said is hinged relative to the frame, the right lever is also mounted hinged relative to the frame; the right lever and the bent lever are mounted at articulation with respect to the frame by axes carried by an axis support secured to the U-beam, the right lever and the bent lever passing through, on the one hand, a notch formed in the soul of the U-beam

  and, on the other hand, a passage provided in the wall of the body.

  Advantageously, the flap is coupled to an operating bar slidably mounted in the frame and urged by a return spring to a position for which the flap is in the closed position; in this position which corresponds to the shutter closing position, the operating bar is

in abutment on the frame.

  Preferably, the operating bar is adapted to cooperate with one of the ends of a pusher mounted displaceable generally axially with respect to the frame and the other end of which is articulated at the end of the control arm of the bent lever of the other side of the axis by which said bent lever is articulated on the fixed frame relative to that o is located the axis

  by which it is articulated on the operating lever.

  Advantageously, a detent articulated on the frame is adapted to cooperate, by a cam which it comprises, with the right lever; the trigger can be actuated by a cable against a trigger spring: thanks to this arrangement, a pull on the cable is enough to unlock the attachment means for the end piece and automatically unhook the end piece from the source

of emission of the gases to be aspirated.

  Preferably, a protective grid is placed transversely

in the sleeve.

  Advantageously, the gas emission source is the outlet from the pot

  motor vehicle exhaust.

  The present invention also relates to a gas suction pipe equipped with a nozzle comprising fixing means adapted to fix said nozzle on a source of emission of the gases to be sucked, said nozzle being

as above.

  To better understand the object of the invention, we will now describe, by way of example, purely illustrative and not limiting, a method of

  realization shown in the accompanying drawings.

  In these drawings - Figure 1 is an axial sectional view of a nozzle according to the invention, according to II of Figure 2, the fastening means with which the nozzle is fitted in the unlocked position - Figure 2 is a side view, along arrow II of Figure 1; - Figure 3 is similar to Figure 1, the fixing means being in the locked position; - Figure 4 is a sectional view along IV- IV of Figure 3 - Figure 5 is a partial sectional view along VV of Figure 3 Figure 6 is a partial sectional view along VI-VI of Figure 3 , without the flexible body; - Figure 7 is a partial sectional view, similar to Figures 1 and 3, illustrating the transition from the locked position to the unlocked position. Referring to the figures, it can be seen that the end piece 10 for suction pipe, according to the invention, comprises a fixed frame 21 consisting of a sleeve 12 and a beam 22 with a U-section secured to the interior wall sleeve 12, here by welding at 23 at the junction of core 34 and wings

beam 22.

  The sleeve 12 is adapted to receive one of the ends of a suction pipe 13, the other end of which is connected to a suction source; the suction hose 13 is generally a long flexible hose

  wound on a mechanically or electrically operated reel.

  The end piece 10 also comprises a body 11, advantageously of a flexible material of the rubber type, of generally frustoconical shape, the part of smaller diameter is extended according to a cylindrical collar 19 by which the body 11 is fitted on the end of the sleeve. 12

  opposite to that which receives the end of the suction pipe 13.

  Fixing means 14 are provided for fixing the end piece to an emission source 20 of gas to be sucked; here, this source is the outlet 20 from the exhaust of a motor vehicle; in Figure 1, two outputs 20 have been shown, including one in phantom, to show that the same

  end piece 10 is capable of being fixed to outlets of different diameters.

  Here, these fixing means are a clamp 14 vice comprising a fixed jaw 15 and a movable jaw 16. The clamp 14 comprises an operating lever 17 provided with a handle 1 8 extended by a blank of triangular shape; at the ends of the base of the triangle thus formed, a straight lever 60 is articulated around an axis 61 and an angled lever 54 around an axis 57; the right 60 and bent 54 levers here are double levers, each consisting of two identical parts placed on either side of the operating lever 17, as can be seen

  for the bent lever 54 in FIG. 4.

  The bent lever 54, double, consists of two arms 55, 56 forming an almost right angle at the junction of which it is articulated around the axis i5 57; the double arm 55 forms a barrel which receives the threaded tail of a screw whose head, advantageously coated with a rubber pad, constitutes the movable jaw 1 6 of the clamp 14, said screw being fixed to the bent lever 54 by a nut cooperating with said threaded rod; The other arm 56, known as the control arm, of the bent lever 54 is mounted with articulation around an axis 58 carried by the

frame 21.

  More specifically, the wings 35 of the beam 22 are extended along returns 84, Figure 4, extending outwardly parallel to the core 34 of the beam 22 and on which are fixed, for example by welding, the bases pieces 48, 49 in L-shaped backing constituting an axis support 47 it is the axis support 47 which carries the axis 58 of the bent lever 54, which axis 58 extends parallel to the core 34 of the beam 22 and is located between

two wings 35 of said beam 22.

  The right lever 60 is also mounted with articulation around an axis

  62 carried by the axis support 47 secured to the beam 22 of the frame 21.

  The double right lever 60 and the bent lever 54, cross, on the one hand, a notch 24 formed in the core 34 of the beam 22 and, on the other hand,

  a passage 72 provided in the wall of the body 11 of the end piece 10.

  The beam 22 extends parallel to the axis of the sleeve 12 at least partially along the inner wall of said sleeve 12 and, outside of it, inside the body 11 to the vicinity of the opening towards the outside of it; the end portion of the core 34 of the beam 22, close to said opening towards the outside, constitutes the fixed jaw 15 of the

clamp 14.

  Figure 1 shows the clamp 14 of the nozzle 10 in the unlocked position; to fix the nozzle 10 on the source of emission of the gases to be sucked, here the outlet of the exhaust pipe 20 of a motor vehicle, the fixed jaw 15 is threaded into said outlet, the latter being surrounded by the body flexible 11, then the operating lever 17 is rotated by bringing the handle 18 closer to the sleeve 12: during this operation, the right 60 and bent 54 levers rotate counterclockwise, with respect to FIG. 1, and the jaws i 5 and 16 approach each other until pinching between them the walls of the outlet of the exhaust pipe 20 and of the flexible body 11, the latter deforming slightly, FIG. 3; the clamp 14 is then in its locked position

  in which the end piece 11 is fixed to the outlet of the exhaust pipe 20.

  This locking position is defined by the abutment of the right lever 60 against a member 63; in the locked position, the centers of the hinge pins 57, 61 and 62 are aligned, Figure 3, or better the center of the axis 61 is slightly below, relative to this figure, the line

  centers of the axes 57 and 62, the clamp 14 being of the toggle type.

  The stop member 63 may be a fixed member; here, we prefer that

  or an unlocking trigger.

  The release trigger 63 is in the form of a lever, also double, FIG. 4; it is articulated around an axis 65, FIGS. 1 and 3, carried by the axis support 47; on one side of the axis 65, the unlocking trigger 63 carries a cam 64 with which the right lever 60 cooperates and, on the other side of the axis 65, a trigger tail 67 which passes through a notch 50 of the axis support 47 against the outermost edge of which it is held in abutment by a spring 66 said expansion; the detent spring 66 is coupled, on one side, to the detent tail 67 and, on the other side, to a hole 39 provided in a front return 38 of the beam 22 obtained by folding

  an extension of the core 34 thereof.

  Opposite the detent spring 66, an unlocking cable 68 is coupled to the detent tail 67 and extends inside the sleeve 12 and part of the suction pipe 13 from which it emerges by crossing the wall thereof at any distance from the end of the sleeve 12, which distance may for example be between 50 and 100 centimeters; a pull on the cable 68 causes the trigger 63 to pivot about its axis 65 counterclockwise, with respect to the figures; the profile of the cam 64 is such that, during this movement, the right lever 60 is caused to rotate clockwise around its axis 62 and the unlocking of the clamp 14 is obtained, as shown in FIG. 7; this unlocking of the clamp 14 can be carried out manually, by manually pulling on the cable 68; it can also be carried out automatically, the free end of the cable 68, opposite to that by which it is coupled to the detent tail 67, being fixed relative to the room in which the vehicle is placed: when the latter, equipped with the clamp 14, leaves this room, the cable 68 is stretched up to

  unlocking of the clamp 14 which separates automatically from the vehicle.

  A flap 40-41 is provided inside the sleeve 12 of the frame 21; here, the flap consists of two half-flaps 40 and 41, as is better visible in FIG. 5. Each half-flap 40, 41 is in the form of a half-disc and carries two half-axes, a half-axis upper 42 and a lower half-axis 43, with respect to FIGS. 1 and 3, aligned generally diametrically; the upper half-axis 42 pivotally traverses a hole formed in a lug 36 extending the core 34 of the beam 22 and the lower half-axis 43 pivotally traverses a hole formed in a lug 31 extending the core 29 of a U-shaped spacer 28 welded at 23 to the sleeve 12 in the manner of the beam 22 which it faces, FIG. 6, the wings 30 of the spacer 28 being practically in line with the wings 35 of the beam 22 to which they are subject. One of the wings 30 of the spacer 28 is extended, along a tab 32, in line with the axis of the nozzle 10; said tab 32 is provided with a transverse return 33 pierced in line with a cable passage 37 which it carries, for the passage and guiding of the cable 68 before its exit through the wall of the pipe

suction 13.

  The two half-flaps 40, 41 are coupled to an operating bar 44 slidably mounted through the wings 27 of a rider 25 of U section, the wings 27 of the rider 25 extending transversely relative to the axis of l end piece 10 and the core of the rider 25 being pressed against the internal face of the core 34 of the beam 22 to which it is secured, for example by welding. The operating bar 44 extends outside of the jumper 25, on either side of the latter; on the side of the half-flaps 40, 41, it carries a tail 73 in the general shape of Y whose branches carry lights 74, 75 which

  receive shafts 80,81 carried by legs 82, 83 integral with the half

  flaps 40.41, respectively; thus, by moving the operating bar 44 axially, the half-flaps 40, 41 are caused to rotate about their axes of articulation; the operating bar 44 is surrounded by a return spring 46 placed inside the rider 25 and bearing, on one side, on the inner face of the wing 27 of the rider 25 closest to the half-flaps 40 , 41 and, on the other side, on a support means 45 secured to the operating bar 44; in the leftmost position, relative to the figures, of the operating bar 44, defined by the abutment of the support means 45 against the internal face of the wing 27, of the rider 25, which faces it , the two half-flaps 40, 41 are in the same transverse plane, FIG. 1, in their so-called closed position; in the right-most position of the operating bar 44, defined above, the half-flaps 40, 41 have moved closer

  from each other, Figures 3 and 5, and are in their so-called open position.

  By its end furthest from the half-flaps 40, 41, the operating bar 44 is adapted to cooperate with one of the ends of a pusher 51, more precisely with the core 52 of the pusher 51, here in the form of U, placed inside the beam 22, the wings 53 of which extend on either side of the trigger 63 and are mounted for rotation, by their ends, around an axis 59 placed at the end of the arm control 56 of the bent lever 54; The axis 59 is placed on the other side of the axis 58 by which the bent lever 54 is articulated on the fixed frame 21 relative to that o is located the axis 57 by

  which this same bent lever 54 is articulated on the operating lever 1 7.

  Thus, the pusher 51 is adapted to be displaced globally axially with respect to the fixed frame 21, being guided by the bases of the parts 48, 49 in

L constituting the axis support 47.

  In the unlocking position of the clamp 14, the clamp is kept open by virtue of the return spring 46 and by the cooperation in abutment between the

  operating bar 44 and the pusher 51 itself coupled to the bent lever 54.

  In this position, the half-flaps 40, 41 are in the closed position, and the suction source is isolated from the outside; during the locking operation described above, the bent lever 54 rocks and drives to the right, with respect to FIG. 1, the pusher 51 which itself also drives the operating bar 44 to the right: at the end of the locking operation, the half-flaps 40, 41 are in the open position, FIGS. 3 and

  5, and the gas suction is operational.

  Advantageously, a protective grid 69 is placed transversely in the sleeve 12; the latter is here in cut sheet metal having openings 71, for example of hexagonal outline; lugs, here three in number, allow the grid 69 to be fixed, for example by welding, to the inner wall of the sleeve 12; of course, grid 69

  is notched to allow the passage of the beam 22.

Claims (12)

  1. End piece for gas suction pipe comprising, on the one hand, fixing means (14) adapted to fix said end piece on a source of emission (20) of the gases to be sucked and, on the other hand, a sleeve (12) adapted to receive one end of a suction pipe (13), the other end of which is connected to a suction source, the fixing means (14) being designed to occupy at least two positions, a so-called locking position in which the endpiece is fixed on the emission source (20) and a so-called unlocking position in which the endpiece is detached from the emission source (20), characterized by the fact that a flap (40-41) is provided inside said sleeve (12) and adapted to occupy at least two positions, a so-called closed position in which the passage section offered by said sleeve (12) is considerably reduced and a so-called open position in which said passage section is relatively i15 i important, said flap (40-41) being controlled by said fixing means (14) so that, when the fixing means are in the unlocked position, said flap (40-41) is in the closed position and, when the fixing means (14) are in the locked position, said   flap (40-41) is in the open position.   2. End piece according to claim 1, characterized in that it also comprises a body (11) of generally frustoconical shape, the portion of smaller diameter is extended according to a cylindrical collar (19) by which said body (11) is fitted on the end of said sleeve (12)   opposite to that which receives the end of the suction pipe (13).   3. End piece according to claim 2, characterized in that the body   (11) is made of a flexible material of the rubber type.   4. End piece according to one of claims 1 to 3, characterized in that   that the fixing means are a clamp (14) comprising a fixed jaw (15) and a movable jaw (16).   5. End piece according to claim 4, attached to one of   Claims 2 or 3, characterized in that the clamp (14) is carried by   a fixed frame (21) consisting of the sleeve (12) and a beam (22) with a U-shaped section secured to the inner wall of the sleeve (12) along which it extends at least partially, while at outside of it (12) it extends inside the body (11) to the vicinity of the opening towards the outside thereof (11), the end of the beam ( 22) close to said   opening constituting the fixed jaw (15) of the clamp (14).   6. End piece according to claim 5, characterized in that the clamp (14) comprises an operating lever (17) on which are articulated, on the one hand, a straight lever (60) and, on the other hand, a bent lever (54) consisting of two arms (55, 56) forming an almost right angle, one of which (55) carries the movable jaw (16) and the other (56) of which is said to be control is mounted with articulation with respect to to the fixed frame (21), the right lever (60) also being   mounted at articulation with respect to the fixed frame (21).   7. End piece according to claim 6, characterized in that the right lever (60) and the bent lever (54) are mounted at articulation relative to the fixed frame (21) by pins (62,59) carried by a support (47) of axes integral with the U-shaped beam (22), the right lever (60) and the bent lever (54) passing through, on the one hand, a notch (24) formed in the core (34) of the beam (22)   U-shaped and, on the other hand, a passage (72) provided in the wall of the body (11).   8. End piece according to one of claims 5 to 7, characterized in that   that the flap (40-41) is coupled to an operating bar (44) slidably mounted in the fixed frame (21) and urged by a return spring (46) to a position for which the flap (40-41) is in the closed position. 9. End piece according to claim 8, characterized in that, in this position which corresponds to the closed position of the flap (40-41), the   operating bar (44) is in abutment on the fixed frame (21).   10. End piece according to one of claims 8 or 9, characterized by the   fact that the operating bar (44) is adapted to cooperate with one of the ends of a pusher (51) mounted displaceable generally axially with respect to the fixed frame (21) and the other end of which is mounted with articulation at the end of the control arm (56) of the bent lever (54) on the other side of the axis (58) by which said bent lever (54) is articulated on the fixed frame (21) relative to that o is located l axis (57) by which it is articulated on the lever operation (17).   11. End piece according to one of claims 6 to 10, characterized by the   fact that an articulated trigger (63) (65) on the fixed frame (21) is adapted to   cooperate, by a cam (64) which it comprises, with the right lever (60).   i12. End piece according to claim 11, characterized in that the trigger (63) can be actuated by a cable (68) against a spring trigger (66).   1 5 13. End piece according to one of claims 1 to 12, characterized by the   fact that a protective grid (69) is placed transversely in the sleeve (12).   14. End piece according to one of claims 1 to 13, characterized by the   causes the emission source (20) of the gases to come from the exhaust of a motor vehicle.   15. Gas suction pipe equipped with a nozzle comprising fixing means adapted to fix said nozzle on a source of emission of the gases to be sucked, characterized in that said nozzle is according to one of claims 1 to 14.