FR3071469A1 - MOTOR VEHICLE FLOOR AND ASSOCIATED MOUNTING METHOD - Google Patents

Abstract

This floor (12B) of a motor vehicle comprises: - a panel (32) defining at least one through opening (34); - an upper half-handle (40), fixed on an upper bearing surface (60) of the panel (32) and projecting into the through opening (34), and; - A lower half-handle (42), fixed on a lower bearing surface (62) of the panel (32) and projecting into the through opening (34). The upper half-handle (40) and the lower half-handle (42) are identical.

Description

Motor vehicle floor and associated mounting method

The present invention relates to a motor vehicle floor comprising:

- a panel defining at least one through opening;

- an upper half-handle, fixed on an upper support surface of the panel and projecting into the through opening, and;

- a lower half handle, fixed to a lower support surface of the panel and projecting into the through opening.

Rear assemblies of motor vehicles usually include trunk floors, which are parts resting for example directly against the sheet metal or above the spare wheel, or loading floors, which are rigid flat parts whose edges rest generally on supports placed against the side trunk linings.

The boot floors must be able to be raised to allow, for example, access to the spare wheel.

As for loading floors, they can generally be positioned in the trunk on several levels and therefore must be easy to handle. In addition, this type of part often constitutes the cover of a storage space and as such is often lifted to allow access to the objects placed in this storage space.

It is known to form in these floors an opening acting as a handle. The opening is for example essentially rectangular in shape. The sides of this opening are covered with a part often made up of two parts positioned on either side of the floor. This piece is locally superimposed on the facing (usually a textile or carpet) placed on the two surfaces of the floor, and ensures an acceptable finish, feel and appearance by hiding the edges and the thickness of the opening.

However, this part requires significant assembly time during the manufacturing process of the floor. In addition, the mounting direction is misleading and an operator may have to reverse the upper part and the lower part, which affects productivity.

An object of the invention is therefore to provide a floor which is simple to handle and to assemble.

To this end the invention relates to a floor of the aforementioned type characterized in that the upper half-handle and the lower half-handle are identical.

The floor according to the invention may include one or more of the following characteristics, taken alone or in any technically possible combination:

- The half-handles each comprise at least one catching projection provided with a catching stop and at least one retaining projection defining a retaining orifice;

- the upper half handle and the lower half handle are clipped to each other;

- the hook stop of one of the half handles is received in the retaining hole of the other of the half handles;

- The floor comprises an intermediate part, the upper half-handle and the lower half-handle being clipped to the intermediate part;

the intermediate piece comprises at least one catching projection provided with a catching stop and at least one retaining projection defining a retaining orifice, at least one catching projection of each of the half-handles being respectively received in a hole for retaining the intermediate piece, and at least one catching projection for the intermediate piece being respectively received in a retaining hole for each of the half-handles;

- the hooking projections of the half-handles and of the intermediate piece are aligned;

- Each half-handle comprises an edge folded towards the other half-handle, the folded edges of the half-handles being arranged at a distance from each other, the intermediate piece having a shutter section disposed between said folded edges ;

- the shutter section is in contact with the folded edges of the half-handles;

- the distribution of the attachment projections and the retaining orifices of the same half-handle has a plane of symmetry;

- The floor comprises a flexible piece closing the through opening, retained at least one of the half-handles, the flexible shutter being able to pass from a closed position, in which the room flexible shutter protrudes entirely through the through opening, in a position for partially releasing access to the opening, in which the flexible shutter member is at least partly away from the through opening ;

- the half handles are made of plastic;

- the floor panel has a thickness greater than or equal to 15 mm, and;

- the half handles and an outer surface of the panel have the same color.

The invention further relates to a method for mounting a vehicle floor as described above, comprising the following steps:

- supply of a panel defining at least one through opening;

- Providing an upper half handle and a lower half handle, the upper half handle and the lower half handle being identical, and;

- Attachment of the upper half handle and the lower half handle respectively on an upper support surface and on a lower support surface of the panel.

The method according to the invention may include one or more of the following characteristics, taken alone or in any technically possible combination:

- The step of supplying an upper half-handle and a lower half-handle comprises the manufacture of the upper half-handle and the lower half-handle in the same mold or in molds having molding cavities identical; and,

- the method includes the supply of an intermediate part, the upper half-handle and the lower half-handle being clipped to the intermediate part during the fixing step.

The invention will be better understood on reading the description which follows, given solely by way of example, and made with reference to the appended drawings, in which:

- Figure 1 is a schematic side view of a rear assembly of a motor vehicle comprising a first floor according to the invention;

- Figure 2 is a schematic sectional view of a detail of the first floor of Figure 1;

- Figure 3 is a top view of a half handle of the first floor of Figure 1, and;

- Figure 4 is a schematic sectional view of a detail of a second floor.

In everything that follows, the orientations are the usual orientations of a motor vehicle. Thus, the terms "upper", "lower" "left", "right", "above", "below" are generally understood in relation to the normal direction of movement of the motor vehicle and the position of a driver .

FIG. 1 illustrates a rear assembly 10 of a motor vehicle, provided with a first floor 12A of a motor vehicle.

The rear assembly 10 defines a rear trunk 14 of the motor vehicle. In known manner, the trunk 14 is delimited at the front by a seat 16, and is delimited at the rear by a movable tailgate 18. The trunk 14 is delimited laterally by lateral linings 28 and downwards, by a sheet 30.

The tailgate 18 is generally articulated around a horizontal axis AA ′ between a closed position, in which it closes the boot 14 towards the rear and an open position, illustrated in FIG. 1, in which the tailgate 18 has been lifted back and up to free access to the trunk 14 from the rear of the vehicle.

The first floor 12A is here of the “loading floor” type. The first floor 12A is thus a structuring floor resting laterally on the side linings 28.

The first floor 12A is illustrated in FIG. 2.

It comprises a panel 32 defining at least one through opening 34.

As illustrated in FIG. 2, the floor 12A further comprises a handle 38 fixed to the panel 32. The handle 38 is formed at least by an upper half-handle 40 and a lower half-handle 42 fixed to each other by snap-fastening.

The panel 32 is intended to close a lower part 43 (FIG. 1) of the trunk 14 upwards.

It is in particular intended to support objects. The panel 32 is rigid enough to support without deformation objects of non-negligible mass, for example of mass greater than 10 kg and more generally of mass between 0 g to 50 kg depending on the structure of the panel 32.

The panel 32 is typically made of sandwich material having a honeycomb spacer and composite skins.

The panel 32 is advantageously flat and substantially devoid of relief. It is in particular devoid of ribs or fallen edges which project relative to the panel 32.

The panel 32 has a substantially planar upper surface 44 and a substantially planar lower surface 46 parallel to the upper surface 44.

The surfaces 44, 46 extend longitudinally between a front edge 48 and a rear edge 50 (Figure 1).

The panel 32 has an outer coating 47 applied to the upper surface 44.

The outer covering 47 is made of velvet.

In an embodiment not shown, the upper half-handle 40 penetrates into the thickness of the outer covering 47.

The thickness of the panel 32 is relatively small compared to its dimensions. In the first floor 12A, the panel 32 advantageously has a thickness, taken between the upper surface 44 and the lower surface 46, between 10 mm and 30 mm.

In this example, as illustrated for FIG. 1, the panel 32 is rotatably mounted with respect to the linings 28 around a horizontal axis B-B 'parallel to the axis A-A', by means of members d hinge 51 on the side linings 28.

The panel 32 is thus rotatably mounted around the horizontal axis B-B 'between a substantially horizontal rest position, illustrated in dotted lines in FIG. 1, and a raised position upwards, illustrated in solid lines in FIG. 1, inclined relative to the horizontal to allow access to the lower part 43 of the trunk 14.

In the example shown in FIG. 1, the articulation members 51 are formed by reliefs projecting laterally relative to the lateral edges of the panel 32, in the vicinity of the front left corner and the right front corner of the panel 32.

In an advantageous variant, the reliefs came integrally with the panel 32 and do not exceed beyond the lateral edge of the panel 32 or exceed a few millimeters. The reliefs are also contained in the thickness of the panel 32, so that they do not protrude above the upper surface 44, or below the lower surface 46 of the panel 32.

The articulation members 51 are received in grooves of corresponding dimensions formed in the side linings 28 opposite.

As a variant, the articulation members 51 are pivots projecting laterally with respect to the panel 32.

As illustrated in FIG. 2, the through opening 34 passes vertically through the panel 32. It opens into the upper surface 44 and into the lower surface 46 of the panel 32.

The panel 32 comprises a section 52 projecting at the periphery of the through opening 34 to retain the half-handles 40, 42. The section 52 advantageously extends angularly over the entire periphery of the through opening 34.

It came here in one piece with panel 32.

The edge 52 has a thickness less than that of the panel 32.

The wafer 52 here comprises a peripheral lip 53, extending for example angularly over the entire periphery of the through opening 34.

The peripheral lip 53 has a thickness less than that of the edge 52.

The edge 52 delimits a central passage 54, and above the central passage 54, an upper stamping 56.

The upper stamp 56 defines an upper bearing surface 60.

The upper support surface 60 is disposed in the through opening 34.

The upper support surface 60 extends parallel and recessed vertically with respect to the upper surface 44.

The upper bearing surface 60 defines a shoulder with the upper surface 44 of the panel 32.

The upper support surface 60 is connected to the upper surface 44 by a connection surface 64 oblique to the upper support surface 60.

The edge 52 further defines a lower support surface 62.

The lower support surface 62 extends parallel and in line with the lower surface 46 of the panel 32.

In projection on the upper surface 44 and on the lower surface 46, the through opening 34 opens respectively according to an upper closed contour and a lower closed contour.

The upper closed contour and the lower closed contour here have a substantially rectangular shape.

The upper, respectively lower, closed contour of the through opening 34 defines an area less than 50% of the area presented by the upper surface 44, respectively of the area presented by the lower surface 46.

The through opening 34 is adapted to allow the passage of the fingers of a user's hand.

The handle 38 is suitable for being grasped by a user, in order to move the panel 32 relative to the linings 28.

The upper half-handle 40 and the lower half-handle 42 are identical. In particular, they have the same shape, identical dimensions and are made of the same material.

As illustrated in FIG. 3, in top view, each half-handle 40, 42 has an oblong shape. In particular, in top view, each half-handle 40, 42 has an outer contour and an inner contour of oblong shape.

The upper half-handle 40 and the lower half-handle 42 are each made in one piece.

They are for example manufactured by injection, and typically come from the same mold or from two molds having identical molding cavities.

Each half-handle 40, 42 is typically made of plastic. Each half-handle 40, 42 is typically made of polypropylene.

The half handles 40, 42 and at least one of the upper surface 44 and the lower surface 46 advantageously have the same color.

The upper half-handle 40 is fixed to the upper surface 44 of the panel 32 of the floor 12A and projects into the through opening 34.

It is received on the upper stamp 56 and is applied to the upper bearing surface 60 of the wafer 52. It is advantageously applied angularly over the entire periphery of the upper stamp 56.

Likewise, the lower half-handle 42 is fixed to the lower surface 46 of the floor 12A and projects into the through opening 34.

It is applied to the lower support surface 62 of the wafer 52. It is advantageously applied angularly over the entire periphery of the lower support surface 62.

The lower half-handle 42 and the upper half-handle 40 each comprise a curved edge 65 applied respectively to the upper support surface 60 and to the lower support surface 62.

The lower half-handle 42 and the upper half-handle 40 form an internal housing 66 therebetween.

They each include a folded edge 70 towards the other half handle.

In the example of FIG. 2, the folded edges 70 of the half-handles 40, 42 are in contact with each other. They close the internal housing 66.

The lower half-handle 42 is fixed to the upper half-handle 40, the two half-handles 40, 42 being fixed to the panel 32.

In the first floor 12A, the upper half-handle 40 and the lower half-handle 42 are in contact and clipped to one another.

As illustrated in FIG. 2 and in FIG. 3, the half-handles 40, 42 each comprise at least one catching projection 72 provided with a catching stop 74 and at least one retaining projection 76 defining a orifice deduction 78.

In addition, as illustrated in FIG. 3, the half-handles 40, 42 each comprise at least one guide member 79A and a complementary guide member 79B.

Each grip projection 72 and each retaining projection 76 extend perpendicularly to the upper surface 44 of the panel 32.

In projection on the upper surface 44, each catching projection 72 and each retaining projection 76 are arranged at a distance greater than the thickness presented by the catching stop 74 of the folded edges 70 of the half-handles 40, 42.

Advantageously, each half-handle 40, 42 comprises an equal number of hooking projections 72 and retaining projections 76.

As illustrated in FIG. 3, each half-handle 40, 42 comprises for example two catching projections 72 and two retaining projections 76. As a variant, each half-handle 40, 42 comprises more than two catching projections 72 and more than two retaining projections 76.

Each grip projection 72 has a width greater than 5 mm.

All the attachment projections 72 of the half-handles 40, 42 preferably have the same width.

With reference to FIG. 2, each attachment stop 74 is here arranged at the free end of the attachment projection 72 which is provided with it. It forms a locking head projecting laterally with respect to an axis of the hooking projection 72.

Each hooking stop 74 of one of the half-handles 40, 42 is received and is retained in a retaining orifice 78 of the other of the half-handles 40, 42.

Each retaining projection 76 has a width greater than 9 mm.

All the retaining projections 76 of the half-handles 40, 42 preferably have the same width.

Each retaining orifice 78 has a width less than the width of the retaining projection 76 in which it is defined, and for example greater than 5 mm.

The width of each hooking projection 72 is less than or equal, preferably equal, to the width of the retaining orifice 78 in which the hooking stop 74 of said hooking projection 72 is received.

The distribution of the hooking projections 72 and the retaining orifices 78 of the same half-handle 40, 42 preferably has a plane of symmetry orthogonal to the upper surface 44 of the panel 32.

As illustrated in FIG. 3, the hooking projections 72 and the retaining projections 76 are arranged on the longest sides of the oblong shape of each half-handle 40, 42.

The guide member 79A and the complementary guide member 79B of each half-handle 40, 42 extend perpendicularly to the upper surface 44 of the panel 32.

They are arranged opposite one another, symmetrically on either side of the through opening 34.

The guide member 79A defines a receiving cavity 79C of the complementary guide member 79B.

The guide member 79A is for example a hollow cylinder of revolution.

The complementary guide member 79B is inserted into the receiving cavity 79C of the guide member 79A. It has a cross section complementary to a cross section of the receiving cavity 79C of the guide member 79A.

Advantageously, the guide member 79A and the complementary guide member 79B have lengths greater than the length of the hooking projections 72 and the length of the retaining projections 76.

In the example of FIG. 3, the plane of symmetry of the distribution of the hooking projections 72 and the retaining orifices 78 passes through the guide member 79A and the complementary guide member 79B.

As illustrated in FIG. 3, the guide member 79A and the complementary guide member 79B are arranged at the shortest sides of the oblong shape of each half-handle 40, 42.

A method of mounting the first floor 12A will now be described.

The method includes providing the panel 32, the panel 32 defining the through opening 34.

The method also includes providing the upper half-handle 40 and the lower half-handle 42, the upper half-handle 40 and the lower half-handle 42 being identical. The upper half-handle 40, the lower half-handle 42 and the panel 32 are then placed away from each other.

This step of supplying the upper half-handle 40 and the lower half-handle 42 preferably comprises a step of prior manufacturing of the upper half-handle 40 and the lower half-handle 42 preferably in the same mold. Alternatively, the upper half-handle 40 and the lower half-handle 42 are produced in molds having identical molding cavities.

The method then comprises fixing the upper half-handle 40 and the lower half-handle 42 respectively to the upper support surface 60 of the panel 32 and to the lower support surface 62 of the panel 32.

During this step, the upper half handle 40 and the lower half handle 42 are clipped to each other.

More specifically, the upper half-handle 40 and the lower half-handle 42 are respectively approached from the upper bearing surface 60 and from the lower bearing surface 62 of the panel 32, until each stop hook 74 of one of the half-handles 40, 42 is received in a retaining orifice 78 of the other of the half-handles 40, 42.

During this approach, the complementary guide member 79B is inserted into the guide member 79A. The approach of the upper half-handle 40 and the lower half-handle 42 is thus guided by these guide members 79A, 79B. These guide members 79A, 79B thus avoid misalignment of the half-handles 40, 42.

Since the guide member 79A and the complementary guide member 79B have lengths greater than the length of the catching projections 72 and the length of the retaining projections 76, the guidance is carried out up to the snap.

Thereafter, the half-handles 40, 42 are secured to one another and to the panel 32.

In particular, each curved edge 65 of the lower half-handle 42 and of the upper half-handle 40 is then respectively applied to the upper bearing surface 60 and to the lower bearing surface 62. The edge 52 is then clamped between the curved edges 70.

A second floor 12B according to the invention is illustrated in FIG. 4.

The second floor 12B differs from the first floor 12A in that the lower half-handle 40 and the upper half-handle 42 are not clipped directly to each other. The upper half handle 40 and the lower half handle 42 are arranged apart from one another. In particular, they have no contact with each other.

In the second floor 12B, the panel 32 has a thickness, taken between the upper surface 44 and the lower surface 46, greater than or equal to 15 mm, for example between 15 mm and 20 mm. As a variant, the panel 32 has a thickness, taken between the upper surface 44 and the lower surface 46, greater than or equal to 20 mm.

As illustrated in FIG. 4, the section 52 delimits above and below the central passage 54, the upper stamp 56 and a lower stamp 58. The lower half-handle 42 is then received on the lower stamp 58.

The lower stamp 58 defines the lower bearing surface 62.

The lower support surface 62 extends recessed vertically relative to the lower surface 46.

It defines a shoulder with the lower surface 46 of the panel 32.

The lower support surface 62 is connected to the lower surface 46 by a connection surface 64 oblique to the lower support surface 62.

The lower half-handle 42 and the upper half-handle 40 form between them a passage 68 opening horizontally into the through opening 34.

The folded edges 70 of the half-handles 40, 42 are here arranged at a distance from each other. They define said passage 68 as illustrated in FIG. 4.

The floor 12B thus comprises an intermediate part 80, the upper half-handle 40 and the lower half-handle 42 being clipped to the intermediate part 80.

The intermediate piece 80 is flush with the folded edges 70 of the half-handles 40, 42. In other words, the intermediate piece 80 does not protrude into the through opening 34 relative to the half-handles 40, 42.

The intermediate piece 80 is preferably made of the same material as the half-handles 40, 42, for example made of polypropylene.

It comprises a central support 82, at least one hooking projection 84 provided with a hooking stopper 86 and at least one retaining projection 88 defining a retaining orifice 90.

The intermediate part 80 further comprises for example a shutter section 92.

The intermediate piece 80 advantageously comprises a number of catching projections 84 equal to the total number of retaining projections 76 of the half-handles 40, 42.

It preferably comprises a number of retaining projections 88 equal to the total number of hooking projections 72 of the half-handles 40, 42.

The intermediate piece 80 extends for example angularly over the entire periphery of the through opening 34.

The central support 82 is flat.

It is here arranged in the internal housing 66, parallel to the upper surface 44 of the panel 32.

The central support 82, each catching projection 84 and each retaining projection 88 of the intermediate piece 80 are formed in one piece.

Each of the hooking 84 and retaining projections of the intermediate piece 80 extends perpendicularly to the central support 82. Each extends at the level of an outer edge 94 of the central support 82.

For each catching projection 84 of the intermediate piece 80, a retaining projection 88 of the intermediate piece 80 extends opposite to said catching projection 84 relative to the central support 82.

Each gripping projection 72 of the half-handles 40, 42 is received in a retaining orifice 90 of the intermediate piece 80, and each gripping projection 84 of the intermediate piece 80 is received in a retaining orifice 78 of the half-pieces handles 40, 42.

As illustrated in FIG. 4, the hooking projections 72, 84 of the half-handles 40, 42 and of the intermediate piece 80 are aligned. Likewise, the retaining projections 76, 88 of the half-handles 40, 42 and of the intermediate piece 80 are aligned.

The shutter section 92 extends perpendicularly to the central support 82. It extends at an inner edge 96 of the central support 82 opposite the outer edge 94 of the central support 82.

The shutter section 92 here extends perpendicularly on either side of the central support 82.

The shutter section 92 is disposed between the folded edges 70 of the half-handles 40, 42.

It is in contact with the folded edges 70 of the half-handles 40, 42, and is flush with an outer surface 98 of these folded edges 70.

As illustrated in FIG. 4, the shutter section 92 closes the passage 68.

The shutter section 92 and the central support 82 are formed in one piece.

A method of mounting the second floor 12B will now be described.

This mounting method differs from the method of mounting the first floor 12A in that the half handles 40, 42 are not clipped to each other.

The method includes a step of supplying an intermediate piece 80.

During the fixing step, the lower half-handle 42 and the upper half-handle 40 are clipped to the intermediate piece 80.

The intermediate piece 80 is for example first clipped to the lower half-handle 42.

In particular, it is brought closer to the lower half-handle 42 until each hooking stop 74, 86 of each of the intermediate piece 80 and of the lower half-handle 42 is respectively received in a retaining orifice 78, 90 of the lower half-handle 42 and of the intermediate piece 80.

The lower half-handle 42 is then secured to the intermediate piece 80. They are subsequently clipped to the upper half-handle 40.

As previously, the upper half-handle 40 and the lower half-handle 42 to which the intermediate piece 80 is already clipped are respectively approached from the upper bearing surface 60 and from the lower bearing surface 62 of the panel 32 , until each hooking stop 74, 86 of each of the intermediate piece 80 and of the upper half-handle 40 is respectively received in a retaining orifice 78, 90 of the upper half-handle 40 and of the intermediate piece 80.

Thereafter, the half-handles 40, 42, the intermediate piece 80 and the panel 32 are integral with each other.

As a variant of the method for mounting the second floor 12B, the intermediate piece 80 is first clipped to the upper half-handle 40.

As a variant, the floor 12A comprises a flexible piece for closing the through opening 34, not shown, retained at at least one of the half-handles 40, 42, the flexible closing piece being able to pass from one shutter position, in which the flexible shutter piece projects entirely into the through opening 34, in a position for partially releasing the access to the opening 34, in which the flexible shutter piece is at least partly away from the through opening 34.

In this variant, the guide member 79A and the complementary guide member 79B extend from the intermediate piece 80.

The flexible closure piece is then partly received in the internal housing 66 and passes through the intermediate piece 80. It is thus disposed in the passage 68 opening into the through opening 34.

For example, the flexible closure piece is retained at the guide member 79A and at the complementary guide member 79B.

The flexible closure piece has orifices in which the guide member 79A and the complementary guide member 79B are received.

Such a flexible part is for example an elastic strap or a valve.

As a variant of the various embodiments, the floor 12 is of the “boot floor” type and rests on the sheet metal 30 or on a spare wheel itself resting on the sheet metal 30. In this case, the thickness of the panel 32 is included between 2 mm and 6 mm.

Thanks to the characteristics described above, the mounting process is particularly simple and avoids mounting errors.

Each of the half-handles can be mounted either as an upper half-handle 40 or as a lower half-handle 42. It is therefore not necessary to form keying pins to prevent assembly errors, since the half-handles handles 40, 42 are identical.

This significantly reduces the cost of the part by standardizing its manufacture. In addition, the productivity of the manufacturing process is improved, since the risk of assembly error is nonexistent.

In addition, the intermediate piece 80 makes it possible to adapt the same half-handles 40, 42 to panels of different thicknesses, without changing the dimensions of the half-handles 40, 42 and therefore without changing their manufacture. This therefore allows manufacturing savings by reusing the same half-handles 40, 42 for different floors.

Finally, using the same mold for the manufacture of the half-handles 40, 42 makes it possible to save equipment and reduce the cost of the parts.

Claims (15)

1. - Floor (12A, 12B) of a motor vehicle comprising: - a panel (32) defining at least one through opening (34); - an upper half-handle (40), fixed on an upper bearing surface (60) of the panel (32) and projecting into the through opening (34), and; - a lower half-handle (42), fixed on a lower bearing surface (62) of the panel (32) and projecting into the through opening (34), characterized in that the upper half-handle (40) and the lower half handle (42) are identical. 2. - Floor (12A, 12B) according to claim 1, wherein the half-handles (40, 42) each comprise at least one hooking projection (72) provided with a hooking stop (74) and at at least one retaining projection (76) defining a retaining orifice (78). 3. - Floor (12A, 12B) according to claim 2, wherein the upper half-handle (40) and the lower half-handle (42) are clipped to each other. 4. - Floor (12A, 12B) according to claim 3, wherein the hooking stop (74) of one of the half-handles (40, 42) is received in the retaining orifice (78) of the 'other half handles (40, 42). 5. - Floor (12A, 12B) according to claim 2, comprising an intermediate part (80), the upper half-handle (40) and the lower half-handle (42) being clipped to the intermediate part (80). 6. - Floor (12A, 12B) according to claim 5, wherein the intermediate piece (80) comprises at least one catching projection (84) provided with a catching stop (86) and at least one projection retaining (88) defining a retaining orifice (90), at least one catching projection (72) of each of the half-handles (40, 42) being respectively received in a retaining orifice (90) of the intermediate piece ( 80), and at least one hooking projection (84) of the intermediate piece (80) being respectively received in a retaining orifice (78) of each of the half-handles (40, 42). 7. - Floor (12A, 12B) according to claim 6, wherein the gripping projections (72, 84) of the half-handles (40, 42) and of the intermediate piece (80) are aligned. 8. - Floor (12A, 12B) according to any one of claims 5 to 7, wherein each half-handle (40, 42) comprises a folded edge (70) towards the other half-handle (40, 42), the folded edges (70) of the half-handles (40, 42) being arranged at a distance from each other, the intermediate piece (80) having a shutter section (92) disposed between said folded edges (70). 9. - Floor (12A, 12B) according to claim 8, wherein the shutter section (92) is in contact with the folded edges (70) of the half-handles (40, 42). 10. - Floor (12A, 12B) according to any one of claims 5 to 9, in which the distribution of the catching projections (72) and the retaining orifices (78) of the same half-handle (40, 42) has a plane of symmetry. 11. - Floor (12A, 12B) according to any one of the preceding claims, in which the floor (12A, 12B) comprises a flexible piece for closing the through opening (34), retained at least one half-handles (40, 42), the flexible closure piece being able to pass from a closed position, in which the flexible closure piece protrudes entirely through the through opening (34), to a position for partially releasing the access to the opening (34), in which the flexible closure piece is at least partially away from the through opening (34). 12. - Floor (12A, 12B) according to any one of the preceding claims, in which the half-handles (40, 42) are made of plastic. 13. - Method for mounting a vehicle floor (12A, 12B) according to any one of the preceding claims, comprising the following steps: - supply of a panel (32) defining at least one through opening (34); - Providing an upper half-handle (40) and a lower half-handle (42), the upper half-handle (40) and the lower half-handle (42) being identical, and; - Attaching the upper half-handle (40) and the lower half-handle (42) respectively on an upper support surface (60) and on a lower support surface (62) of the panel (32). 5 14, - mounting method according to claim 13, wherein the step of providing an upper half-handle (40) and a lower half-handle (42) comprises manufacturing the upper half-handle (40 ) and the lower half-handle (42) in the same mold or in molds having identical molding cavities. 15.- mounting method according to any one of claims 13 or 14, comprising the provision of an intermediate piece (80), the upper half-handle (40) and the lower half-handle (42) being clipped to the intermediate piece (80) during the fixing step.