A quick-release device consisting of two connecting parts, designed to attach a tool to the end of a machine arm.

Abstract

Title: Quick coupler device in two connecting parts, intended for attaching a tool to the end of the arm of a machine. Quick coupler device, intended for attaching a tool, such as a bucket, to the end of the arm of a machine, such as a hydraulic excavator or similar, comprising a first connecting part intended to be attached to the bucket and a second connecting part intended to be attached to the arm, the first part comprising a base plate having a front edge and a rear edge, a coupling trunnion, or hook, respectively, extending from the underside of the base plate and a locking hook extending from the upper side of the base plate, the second part comprising a hook, or trunnion, respectively, intended to couple to the coupling trunnion, or hook, respectively, of the first part and a slidingly mounted locking plate preloaded by spring-like means.The locking hook of the first part, intended to pass through a through opening formed in the sliding locking plate of the second part, to hook onto an edge of the opening after the locking plate slides to ensure the locking of the quick-release fastener device, is characterized in that the front edge of the base plate of the first part defines a notch, in particular of flared shape. Figure for the abbreviation: Fig. 1,

Description

Title of the invention: A quick-release device in two connecting parts, intended for attaching a tool to the end of a machine arm.

[0001] The present invention relates to a quick-release device in two connecting parts, intended to attach a tool, such as a bucket, to the end of the arm of a machine, such as a hydraulic excavator or the like, the first part being intended to be attached to the bucket and comprising a trunnion, or a coupling hook, respectively, the second part being intended to be attached to the arm and comprising a hook, or a trunnion, intended to couple to the trunnion, or hook, of the first part, the second part comprising a slidingly mounted locking plate preloaded by spring-forming means, and the first part comprising a locking hook projecting from the first part on the opposite side of which the coupling trunnion, or hook, respectively, projects.The locking hook is designed to pass through a through-hole formed in the sliding locking plate and to hook onto an edge of the opening after the locking plate has slid forward, thus locking the quick-release coupling device and securing the bucket to the machine.

[0002] Devices forming quick fasteners of this kind are already known, for example from FR2809709 or FR2946061.

[0003] We wish to continuously improve the security of this type of device.

[0004] According to the invention, a quick-release device for attaching a tool, such as a bucket, to the end of the arm of a machine, such as a hydraulic excavator or the like, comprising a first connecting part for attaching to the bucket and a second connecting part for attaching to the arm, the first part comprising a base plate having a front edge and a rear edge, a coupling trunnion, or hook, respectively, extending from the lower face of the base plate and a locking hook extending from the upper face of the base plate, the second part comprising a hook, or trunnion, respectively, for coupling to the coupling trunnion, or hook, respectively, of the first part and a slidingly mounted locking plate preloaded by spring-forming means,The locking hook of the first part is designed to pass through a through opening formed in the sliding locking plate of the second part, to hook onto an edge of the opening after the locking plate has slid forward, thus securing the quick-release fastener device. is characterized in that the front edge of the base plate of the first part defines a notch, notably of flared shape.

[0005] Preferably, the locking hook has a shank portion and a head portion projecting laterally from the shank portion in the forward direction, and the notch extends to the vertical position of the head portion of the locking hook, in particular to the shank portion.

[0006] By providing such a notch at the front, it is ensured that soil or other debris does not become lodged between the two connecting parts when the quick coupler is locked. This prevents the locking plate from sliding incompletely under the locking hook, giving the illusion of a fully engaged lock. In the event of shocks or vibrations during machine operation, this could result in the tool being detached and falling from the arm if it is not fully locked. This ensures a much safer quick coupler in use.

[0007] Preferably, the first connecting part includes at least one rear leg, in particular two rear left and right legs, in the form of coupling hooks, intended to couple to a trunnion of the second connecting part.

[0008] According to a favorable embodiment, the front edge is notched, comprising a central section and two sections respectively right and left inclined with respect to the central section, in particular at an angle between 30° and 60°, in particular 45°, so as to form the notch.

[0009] Preferably, the front edge defines two front left and right promontories on either side of the notch.

[0010] According to a favorable embodiment, in a longitudinal rear-front section, each promontory comprises an upper end section of curved shape, in particular in the form of an arc of a circle, having its concavity facing downwards.

[0011] According to a favorable embodiment, the two left and right promontories terminate in two outgrowths, respectively right and left.

[0012] In particular, in a longitudinal rear-front section, each protrusion comprises, from the lower surface of the base plate, a curved end section having its concavity facing downwards, preceded by a curved intermediate section having its concavity facing upwards, itself preceded by a straight vertical section, or substantially vertical, for example making an angle of 5° to 10° with the vertical, extending to the upper face of the base plate.

[0013] Preferably, it is formed, on the upper surface of the base plate of the first part, of the left and right lateral shoulders which define flow channels, respectively left and right, which extend between the rear and front edges, and through which water and / or soil and / or other waste can flow.

[0014] In particular, viewed from above, the inner side walls of the shoulders each comprise a rear section, an intermediate section and a front section, the front ends of the intermediate sections being closer to the longitudinal central axis of the base plate than are the rear ends.

[0015] Preferably, the upper surfaces of the shoulders are sloping downwards from the outside inwards.

[0016] According to a favorable embodiment, at the front end of the second connecting part, two stops, respectively left and right, protrude from the lower face of the base plate.

[0017] Preferably, at least a part of the rear face of each stop has a surface shape complementary to the upper end surface of each promontory so that the promontories and the stops are in surface contact in the locking position of the device, and in particular a respective notch is formed in each stop with a shape complementary to that of the protrusions of the first part, so that these protrusions are received inside these notches in the locking position of the device.

[0018] In particular, in each stop a respective region is formed having a surface shape complementary to the upper end surface of the promontories of the first part, so that these promontories are in surface contact with these regions in the locking position of the device.

[0019] In particular, each notch is open on the underside, laterally outwards and towards the rear.

[0020] Preferably, when the protrusions are received in the notches, the vertical inner lateral faces of the protrusions bear against a respective inner wall of the notches.

[0021] Preferably, two left and right protrusions protrude from the lower face of the base plate of the second part, at the rear edge.

[0022] In particular, each protuberance has a central concave-shaped region, the concavity of which is turned downwards and is complementary in shape to the convex upper face of the two left and right hook-shaped legs of the first part, so that the two protuberances come into surface contact with the two hook-shaped legs in the locking position of the device.

[0023] The present invention also relates to a first connecting part intended to be part of a quick-release fastener according to the invention.

[0024] In particular, according to the invention, a first connecting part intended to form part of a quick coupler for attaching a tool, such as a bucket, to the end of the arm of a machine, such as a hydraulic excavator or the like, comprising the first connecting part intended to be attached to the bucket and a second connecting part intended to be fixed to the arm, the first part comprising a base plate having a front edge and a rear edge, a coupling trunnion, or hook, extending from the lower face of the base plate and a locking hook extending from the upper face of the base plate, the second part comprising a hook, or trunnion, intended to couple to the coupling trunnion, or hook, of the first part and a sliding locking plate preloaded by spring-forming means, the locking hook of the first part being intended to pass through a through opening formed in the sliding locking plate of the second part to hook onto an edge of the opening after sliding of the locking plate to ensure the locking of the quick-release device,is characterized in that the front edge of the base plate of the first part defines a notch, notably of a flared shape.

[0025] By way of example only, preferred embodiments of the invention are described in the figures with reference to the drawings, in which:

[0026] The [Fig. 1] is a top perspective view of an embodiment of a first connection part of a device forming a quick-release fastener according to the invention;

[0027] [Fig.2] is a top perspective view of an embodiment of a second connection part of a quick-release device according to the invention, suitable for cooperating with the first connection part of [Fig.1];

[0028] The [Fig.3] is a perspective view of the rear of the second connecting part of the [Fig.2];

[0029] The [Fig.4] is a view of the right side of a middle part of the device forming a quick-release fastener in the locked state, the first and second parts cooperating with each other;

[0030] The [Fig.5] is a perspective view from below of a front part of the second connecting part of the [Fig.2];

[0031] Fig. 6 is a perspective view of a front part of the quick-release device in the locked state, the first and second parts cooperating with each other;

[0032] Fig. 7 shows the quick-release attachment device implemented on a bucket, the second connecting part of Fig. 2 being fixed to the arm of the machine (not shown in the figure) and being locked to the first connecting part 1, itself fixed to the bucket;

[0033] Fig. 8 is a perspective view of another embodiment of the coupler-forming device in the locked state, in which the quick-release fastener and the connecting device are locked to each other;

[0034] Fig. 9 is a top perspective view of the quick-release attachment of the device in Fig. 8, in the unarmed state;

[0035] Fig. 10 is a perspective view of the quick-release fastener of Fig. 9 in which a key has been coupled to the quick-release fastener in order to bring it into the armed state;

[0036] Fig. 11 is a perspective view substantially identical to that of Fig. 10, in which the key has been pivoted forward to pull the upper locking plate forward and thus move the quick-release fastener into the armed position;

[0037] Fig. 12 is a side view of the device of Fig. 8, in an unlocked state, the quick-release fastener being in the armed state of Fig. 11, the key having been removed;

[0038] The [Fig. 13] is a cross-sectional view along the central longitudinal axis of the device in the unlocked state of the [Fig. 12];

[0039] Fig. 14 is a cross-sectional view identical to that of Fig. 13 of the device, in a state still unlocked, but in which the head of the locking hook has penetrated the openings of the base and locking plates of the connecting part;

[0040] [Fig. 15] is a larger scale view of the circled part of [Fig. 14];

[0041] Fig. 16 is a cross-sectional view identical to those in Figures 13 and 14 of the device, in a state that is still unlocked, but in which the head of the locking hook has passed beyond the openings of the base and locking plates of the connecting part;

[0042] The [Fig. 17] is a larger scale view of the circled part of the [Fig. 16];

[0043] Fig. 18 is a cross-sectional view identical to those in Figures 13, 14 and 16 of device, but in the locked state of the device, as also shown in [Fig.8];

[0044] [Fig. 19] is a larger scale view of the circled part of [Fig. 18];

[0045] Figures 20 to 25 are cross-sectional views identical to Figures 13, 14, 16 and 18 showing the different relative positions of the two parts of the device during the unlocking and uncoupling operation;

[0046] [Fig.26] is a larger scale view of the circled part of [Fig.23];

[0047] [Fig.27] is a larger scale view of the circled part of [Fig.24];

[0048] [Fig.28] is a larger scale view of the circled part of [Fig.25];

[0049] Figure 29 is a top perspective view of the first connecting part of the device shown in [Fig. 8]; and

[0050] Fig. 30 is a perspective view from below of the second connecting part of the device shown in Fig. 8.

[0051] In the different figures, elements having an identical function are designated by the same numerical reference.

[0052] In [Fig. 1] a first part 1 of a connection of a device forming a quick coupler according to an embodiment of the invention is shown. This first part 1 is intended to be attached to a bucket, in particular from below, and to couple to the second part 2 of the connection shown in [Fig. 2], itself attached, in particular from above, to the arm of the machine, by means of vertical wings and trunnions not shown.

[0053] The first connecting part 1 comprises a base plate 3 on the rear edge 10 from which protrude two right and left coupling tabs 4, 5 in the form of hooks intended to hook onto an axle or trunnion 9 from the second part 2 to achieve the coupling of the two parts 1 and 2.

[0054] A locking hook 6 extends substantially vertically from the upper face of the plate 3, comprising a stem portion 7 and a head portion 8 which extends laterally forward from the stem portion 7.

[0055] The front edge 11 is notched, comprising a central straight section 12 and two straight sections 13 and 14 respectively right and left which are inclined with respect to the central straight section 12, in particular at an angle between 30 and 60°, in particular 45°, so as to form a notch 15. The notch 15 extends below the head part 8 of the hook 6, in particular to the stem part 7.

[0056] The front edge 11 defines on either side of the notch two promontories 16, 17 left and right which terminate in the form of two protrusions respectively right and left. In longitudinal section (back-to-front), each protrusion comprises, from the lower surface of the base plate 3, a curved end section 18 having its concavity facing downwards, preceded by a curved intermediate section 19 having its concavity facing upwards, itself preceded by a straight vertical section 20, or substantially vertical, for example making an angle of 5° to 10° with the vertical, extending to the upper surface of the base plate 3.

[0057] Furthermore, left and right lateral shoulders 21 are formed on the upper surface of plate 3. These shoulders, together with a central base 22, define left and right drainage channels extending from the rear edge to the front edge, through which water and / or soil and waste can flow. Viewed from above, the outer lateral walls of the shoulders are substantially straight from the rear edge to the front edge, while the inner lateral walls of the shoulders each comprise a rear straight section 25, an intermediate straight section 26, and a front straight section 27. The rear and front straight sections 25 and 27 are parallel to each other and to the outer lateral walls. The intermediate section is inclined relative to the two sections 25 and 27, in particular at an angle between 10° and 45°, in particular between 20° and 30°. The front ends of the The 26 intermediate sections are closer to the center than the rear extremities. The upper surfaces of the shoulders 21 slope downwards from the outside in.

[0058] The head portion 8 of the hook comprises a front upper surface inclined with respect to the vertical, in particular at an angle between 30 and 60°, and a lower surface 23 facing downwards while being substantially horizontal, but in particular slightly inclined at an angle of a few degrees. The head portion 8 further comprises two left and right lugs 24 which extend laterally to the left and right with respect to the rest of the head portion 8.

[0059] Figure 2 shows a first embodiment of a connecting part. Another embodiment is shown in Figure 9. In the embodiment of Figure 2, the locking plate and springs have been omitted. In the embodiment of Figure 2, they are identical to those in the embodiment of Figure 9.

[0060] The second connecting part 2 comprises a base plate 30, from the lower face of which extend two rings 31 intended to be passed through by the trunnion or axis 9 to allow the coupling of the two connecting parts 1, 2 by hooking the hooks 4 and 5 to the axis 9.

[0061] On the other hand, an upper locking plate 32 is mounted on the base plate 30 by sliding relative to it, the sliding plate 32 being forced backwards by means of two springs 700, the respective rear ends of the springs being fixed to eyelets 33 formed at the level of the raised rear edge of the plate 30.

[0062] It is defined in each of the two base plates 30 and sliding plates 32 of respective through openings 34 and 35 opposite each other and of substantially rectangular shape having a width dimension substantially equal to the width dimension of the head 8 of the hook at the level of the two ears 24, the dimension of the openings being however sufficient to allow the passage through it of the hook 6 by ensuring a certain centering achieved by the substantially equal dimensions of the width of the hook at the level of the ears 24 and the width of the rectangular through openings.

[0063] At the front end of the second connecting part 2, two stops 52, 53, left and right respectively, protrude from the underside of the base plate 30. In each stop 52, 53, a respective notch 50, 51 is formed, its shape complementary to that of the protrusions of the protrusions 16, 17, so that these protrusions are received inside these notches in the locking position of the device. Each notch is open on the underside, laterally outwards and towards the rear. When the protrusions are received in the notches 50, 51, the vertical inner lateral faces of the protrusions bear against a respective inner wall 54, 55 of the notches 50, 51.

[0064] Two protrusions 40 left and right protrude from the lower face of the base plate 30, at the rear edge. Each protrusion has a central concave region, the concavity of which is turned downwards and is complementary in shape to the upper convex face 42 of the two hook-shaped left and right tabs 4, 5, so that, as can be seen in particular in [Fig. 4], the two protrusions come into surface contact with the two tabs 4, 5 in the locking position of the device.

[0065] Two fingers 41 left and right protrude from the upper face of the base plate 30 and are intended to cooperate with flexible blades 36 well known in the field (see in particular FR-A-2946061) to provide additional security to the locking by preventing the sliding plate 31 from falling downwards in the event that the springs which constrain it should fail or break.

[0066] Two studs 60, left and right respectively, project from the upper face of the base plate 30, on the front side, approximately at the level of the front edge of the opening of the sliding plate 31. Their function is to receive a cylindrical pin 37 (omitted in [Fig. 2], but visible in [Fig. 9]) on each side, intended to hold the locking plate in its housing during its translation during the locking operation. These pins 37 are offset a few millimeters upwards relative to the locking plate to allow the latter some freedom of tilting, at an angle Alpha shown in [Fig. 16], when the first connecting part 1 lifts the locking plate to trigger the locking mechanism. These cylindrical pins 37 also serve as a maximum stop during the unlocking of the plate.

[0067] A central hook-shaped lug 61 protrudes from the upper face of the base plate 30 and forms a stop for the locking plate in its rearward movement.

[0068] To achieve the locked connection of the first two and second connecting parts of the quick-release device, the operator first makes the two hooks 4 and 5 of the first part 1 hook onto the axis 9 coming from the second connecting part 2, then makes a relative rotational movement of the two connecting parts by means of the arm of the machine.

[0069] The different stages of locking and unlocking respectively are shown in figures 11 to 28.

[0070] Initially, before the locking operation, the second connecting part 2, in particular the locking plate 32, must be placed in a so-called armed position, that is to say, moved forward so that its opening through 35 substantially corresponding with the through opening 34 of the base plate.

[0071] To achieve this arming, a fork-shaped key 200 is used, a stud 201 protruding laterally from one 204 of the fork prongs while the other 205 prong has a shape adapted to the shape of the front edge of the base plate to allow this fork, when the stud 201 has been inserted into a hole 202 formed in a boss 203 protruding upwards from the locking plate, to come into contact with the front edge of the base plate 30 to lever and, with the key, thus pull the locking plate 32 forward relative to the base plate, against the springs 700, passing over a bump 500 coming from the upper face of the base plate 30.This butt 500 has a rear face 501 inclined at approximately 45° and a front face 502 that is vertical. The inclination of the rear face 501 allows the rear edge 503 of the locking plate to pass over the butt during the forward movement of the plate. The steps for bringing the plate to the armed state are identical to those shown in Figures 22 to 28 to illustrate the unlocking and uncoupling of the two connecting parts.

[0072] In the armed position, the rear face of the rear edge 503 of the locking plate 32 bears against the vertical front face 502 of the butt 500, in particular along a surface-to-surface contact.

[0073] Figures 12 to 19 show the different relative positions of the two connecting parts 1 and 2 during the coupling and locking operations.

[0074] In figures 12 and 13, the two parts 1 and 2 have hooked each other by the hooks 4, 5 and the axis 9, the locking plate 32 being in the armed position.

[0075] Initially, the two connecting parts continue their mutual rotational movement, until a shoe 505, originating from the central base 22, at the rear of the head of the hook 6, comes to rest against the lower face 504 of the rear rim 503 of the locking plate 32, as shown in figures 14 and 15.

[0076] The continuation of the mutual rotation of the two connecting parts has the effect of tilting the locking plate by an angle Alpha (allowed by the slightly offset upward positioning of the axes 37, as shown in figures 16 and 17), which has the effect of raising the rear rim 503 of the locking plate 32 beyond the butt 500. At the same time, the head of the hook 6 has passed over the locking plate.

[0077] Since the rear edge 503 no longer abuts against the stop 500, the action of the springs 700 is no longer hindered, and the plate 32 is then pulled backwards until an inclined upper face 505 of the front edge 506 of the plate 32 becomes wedged against the lower bearing surface 23 of the head 8 of the hook 6. In particular, the upper face 505 and the bearing surface 23 are inclined relative to the horizontal by a identical angle. The device is then locked, as shown in figures 18 and 19.

[0078] In [Fig. 5], we see the connecting part 1 attached to the bucket and the second connecting part 2 attached to the arm of the machine, by means of two wings (shown but without numerical reference) and trunnions, not shown. Both parts are in the locked position.

[0079] Figures 29 and 30 show the first and second parts of the device shown in Figures 8, illustrating the differences between the device in Figures 1 and 2 and that in [Fig.8].

[0080] As can be seen in [Fig.29], the two promontories 16, 17 defined on either side of the notch by the front edge 11 of the first connecting part 1 have a rounded upper end surface with its concavity facing downwards.

[0081] The stops 52 and 53 of the second connecting part have a lower surface each comprising two regions, namely an outer region 50 and an inner region, the outer region 50 having a surface shape complementary to that of the upper end surface of the two promontories, while the inner region is wedge-shaped.

[0082] In particular, the surface of the outer region 50 is, like the upper end surface of the promontories, inclined downwards from the outside inwards.

Claims

Demands

1. A quick-attach device for attaching a tool, such as a bucket, to the end of the arm of a machine, such as a hydraulic excavator or the like, comprising a first connecting part (1) for attachment to the bucket and a second connecting part (2) for attachment to the arm, the first part (1) comprising a base plate (3) having a front edge (11) and a rear edge (10), a coupling hook (4, 5), respectively a trunnion, extending from the underside of the base plate (3), on the rear side, and a locking hook (6) extending from the upper side of the base plate (3), the second part (2) comprising a trunnion (9), respectively a hook, for coupling to the coupling hook (4, 5), respectively the trunnion, of the first part (1) and a slidingly mounted locking plate (32) preloaded by spring-formed means,the locking hook (6) of the first part (1) being intended to pass through a through opening formed in the sliding locking plate (32) of the second part (2) to hook onto an edge of the opening after sliding of the locking plate (32) to ensure the locking of the device forming the quick-release fastener, characterized in that the front edge (11) of the base plate (3) of the first part (1) defines a notch (15), in particular of flared shape.

2. Device according to claim 1, characterized in that the locking hook (6) has a shank portion (7) and a head portion (8) projecting laterally from the shank portion (7) in the forward direction, and the notch (15) extends to the vertical position of the head portion (8) of the locking hook (6), in particular to the shank portion (7).

3. Device according to claim 1 or 2, characterized in that the first connecting part (1) has at least one rear tab (4;5), in particular two rear left and right tabs (4, 5), in the form of coupling hooks, intended to couple to a trunnion (9) of the second connecting part (2).

4. A device according to any one of the preceding claims, characterized in that the front edge (11) is notched, comprising a central section (12) and two sections respectively right (13) and left (14) inclined with respect to the central section (12), in particular at an angle between 30° and 60°, in particular 45°, so as to form the notch (15).

5. Device according to any one of the preceding claims, characterized in that the front edge defines two promontories (16, 17) front left and right on either side of the notch, in longitudinal rear-front section, each promontory comprising an upper end section of curved shape, in particular in the form of an arc of a circle, having its concavity facing downwards.

6. Device according to claim 5, characterized in that the two promontories left and right terminate in two outgrowths, respectively right and left.

7. Device according to claim 6, characterized in that in longitudinal back-to-front section, each protrusion comprises, from the lower surface of the base plate (3), a curved end section (18) having its concavity facing downwards, preceded by a curved intermediate section (19) having its concavity facing upwards, itself preceded by a straight vertical section (20), or substantially vertical, for example making an angle of 5° to 10° with the vertical, extending to the upper face of the base plate (3).

8. Device according to any one of the preceding claims, characterized in that it is formed, on the upper surface of the base plate (3) of the first part, of the left and right lateral shoulders (21) which define left and right flow channels, respectively, which extend between the rear (11) and front (10) edges, and through which water and / or soil and / or other waste can flow.

9. Device according to claim 7, characterized in that, viewed from above, the inner side walls of the shoulders each comprise a rear section (25), an intermediate section (26) and a front section (27), the front ends of the intermediate sections being closer to the longitudinal central axis of the base plate (3) than are the rear ends.

10. Device according to claim 7 or 8, characterized in that the upper surfaces of the shoulders (21) are sloping downwards from the outside inwards.

11. A device according to any one of the preceding claims, characterized in that at the front end of the second connecting part (2), two stops (52, 53), respectively left and right, protrude from the lower face of the base plate (30).

12. Device according to claims 5 and 10, characterized in that in each stop (52, 53) there is formed a respective region (50, 51) having a surface shape complementary to the upper end surface of the promontories (16, 17) of the first part (1), so that these promontories (16, 17) are in surface contact with these regions (50, 51) in the locking position of the device.

13. Device according to any one of the preceding claims, characterized in that two protrusions (40) left and right protrude from the lower face of the base plate (30) of the second part, at the rear edge.

14. Device according to claim 13, characterized in that each protrusion (40) has a central concave region, the concavity of which is turned downwards and is complementary in shape to the upper convex face (42) of the two left and right hook-shaped tabs (4, 5) of the first part (1), so that the two protrusions (40) come into surface contact with the two hook-shaped tabs (4, 5) in the locking position of the device.

15. A first connecting part (1) intended to form part of a quick coupler for attaching a tool, such as a bucket, to the end of the arm of a machine, such as a hydraulic excavator or the like, comprising a first connecting part (1) intended to be attached to the bucket and a second connecting part (2) intended to be attached to the arm, the first part (1) comprising a base plate (3) having a front edge (11) and a rear edge (10), a coupling hook (4, 5), respectively a trunnion, extending from the underside of the base plate (3) and a locking hook (6) extending from the upper side of the base plate (3), the second part (2) comprising a trunnion (9), respectively a hook, intended to couple to the coupling hook (4, 5), respectively the trunnion, of the first part (1) and a slidingly mounted locking plate (32) preloaded by means forming spring,the locking hook (6) of the first part (1) being intended to pass through a through opening formed in the sliding locking plate (32) of the second part (2) to hook onto an edge of the opening after the plate has slid, (32) locking to ensure the locking of the device forming quick attachment, characterized in that the front edge (11) of the base plate (3) of the first part (1) defines a notch (15), in particular of flared shape.

Images