Transport and protection device, particularly for machine tools or portable tanks

Abstract

Fluid protection and retention device, particularly for machine tools or portable tanks. The invention relates to a fluid protection and retention device for machine tools or portable tanks containing at least one fluid, particularly a pollutant such as gasoline, oil, or the like, characterized in that it comprises a bottom wall 3 having at least two parallel sides 4, 5 on each of which is mounted at least one side wall 6, 7 capable of occupying at least one deployed position 8 and at least one folded position 9 relative to this bottom wall 3. Figure for the abstract: Fig. 1

Description

Title of the invention: Transport and protection device, particularly for machine tools or portable tanks

[0001] The present invention relates to a transport and protection device for a machine tool or portable tank.

[0002] The present invention relates to the field of devices intended to be transported in spaces, in particular forests, green spaces or public works spaces, which are difficult to access, by a person.

[0003] In these areas, the operation of machine tools and / or other tasks to be performed by the person may require one or more tools; such as hand tools, preferably screwdrivers, such as axes or hatchets, or such wedges of the type used for splitting wood. These tools are often carried in these areas in tool cases separate from transport and protective devices.

[0004] In these contexts with difficult access, the distance from roadways or the steep terrain makes the transport of machine tools, tanks and tools all the more difficult when there are many of them.

[0005] Document FR 2 893 929 Al discloses a container for electrical and electronic waste comprising a retention tray surrounded by wire mesh panels.

[0006] Document WO 2013 / 149289 A1 discloses a pallet system consisting of a pallet equipped with a plurality of panels. The pallet has a base configured to receive elements of a lifting device to allow the pallet to be lifted and a containment tray.

[0007] The purpose of this application is to propose a transport and protection system that reduces the number of transports to be made to these spaces.

[0008] To this end, the invention relates to a device for protecting and transporting a machine tool or a transportable tank. The device comprises a base wall having at least two parallel sides, on each of which is mounted at least one side wall capable of occupying at least one folded position relative to this base wall. The protective and transport device further comprises a tool-holding device having at least one compartment for receiving a tool.

[0009] Advantageously, the compartment is arranged so that the tool received in the compartment is accessible from outside the device when the side wall takes the folded position.

[0010] These additional features make it easier for the person to grasp the tool.

[0011] According to one possibility, the protection and transport device comprises at least two side walls and furthermore closure means designed to hold the side walls in their folded position above the bottom wall.

[0012] These additional features make it easier to transport the device.

[0013] Advantageously, the closing means include at least one connecting element positioned above the bottom wall and linking the side walls in their folded position to hold the side walls in their folded position.

[0014] According to a possible additional feature, the bottom wall is rectangular in shape, the side walls are mounted on the parallel longitudinal sides and the connecting element is arranged on the transverse sides.

[0015] Preferably, the connecting element comprises the tool holder device.

[0016] According to one possibility, the tool holder device is secured to the side wall and / or the bottom wall, preferably by means of a securing of the connecting element.

[0017] According to a possible additional feature, the device is further a fluid retention device, the machine tool or the transportable tank containing at least one fluid, in particular a pollutant, such as gasoline, oil or the like, the side wall further being able to occupy at least one deployed position in the plane of the bottom wall to define a work plane.

[0018] Thus, the fluid transport, protection, and containment device is suitable for preventing the risk of pollution from spills or overflows into the environment of pollutants that may be contained in portable tanks, or even in machine tools whose operation requires the supply of such a pollutant, such as a fuel like gasoline or diesel or a lubricant like oil. The fluid transport, protection, and containment device can be a portable, environmentally friendly piece of equipment. The machine tool can be a hand tool, a thermal tool, or a technical platform.

[0019] Whether in public works or landscaping, or even forestry work, it is common to use various machine tools, such as chainsaws, crushers, concrete mixers, vibrating plates, mowers, sprayers, blowers, cultivators, etc., whose operation requires the use of fluids, particularly hydrocarbons.

[0020] Most of these tools have a small-volume reservoir that must be refilled frequently, particularly at the point of use. This refilling is usually carried out using portable containers such as drums, jerrycans, or similar. The handling constraints of these reservoirs, the conditions under which refilling takes place, the size of the machine tool's refilling cap, and the difficulty of assessing the fill level, These are all risks of fluid spillage or overflow and environmental pollution.

[0021] It should be noted that these portable tanks are themselves a source of fluid leakage due to the lack of sealing in their closure systems or their fragility, particularly in the environments where they are used, such as construction sites, tree-trimming areas, forests, etc. Indeed, many of these tanks are made of plastic and are exposed to the risk of punctures. Furthermore, in their operating environment, they frequently tip over, increasing the risk of leaks through faulty closure systems.

[0022] In the context of this application, a protective and containment device has been devised, forming at least a partial enclosure, capable of significantly limiting the risk of spillage of polluting fluids into the environment during the filling phases of the containers of these fluids used in various portable machine tools. In particular, this device is capable of containing these fluids in the event of a spill.

[0023] In the context of the present application, it has also been imagined that such a device could define a protection for a transportable tank, or even for a machine tool, so as to limit the risks of deterioration of the latter while constituting, within the framework of this protection function, means capable of collecting and retaining any fluid likely to flow from such a tank or such a machine tool.

[0024] In addition, this protection and retention device according to the invention is able to contribute to the stability of a transportable tank by preventing it from tipping over too easily.

[0025] Moreover, thanks to more suitable carrying means, this protection and retention device makes it easier to transport such a tank or even a machine tool.

[0026] According to one possibility, at least one side wall is connected by means of articulation to the bottom wall.

[0027] Advantageously, at least one of the bottom and side walls defines a fluid retention tray

[0028] According to a possible additional feature, at least one tray is lined with a fluid retention absorbent material.

[0029] Advantageously, each of the bottom and side walls defines a fluid retention tray.

[0030] In addition, according to another advantageous feature, the protection and retention device includes sealing cover means at the level of the junction between two walls.

[0031] Advantageously, the protection and retention device includes a means for maintaining the retention means of the absorbent material in the tray.

[0032] Advantageously, the protection and retention device includes closing means, such as strapping means or others, defined to keep the bottom and side walls folded around a machine tool or a transportable tank.

[0033] This protection and retention device can also be equipped with gripping means to facilitate its transport.

[0034] According to a possible additional feature, the closing means include at least one connecting element positioned above the bottom wall and linking the side walls in their folded position to hold the side walls in their folded position.

[0035] According to one possibility, the connecting element includes a tool-holding device provided with at least one compartment for receiving a tool.

[0036] Advantageously, the bottom wall is rectangular in shape, with side walls mounted on the parallel longitudinal sides and the connecting element arranged on the transverse sides.

[0037] One of the advantages arising from the present invention is that it is sufficient to place a machine tool above the deployed walls of the protection and containment device so that, during the fluid filling phase, such as with hydrocarbons, any overflow or leakage of fluid is automatically collected and contained through the tray-shaped walls of this device. Since these trays can be lined with an absorbent containment material, any subsequent risk of polluting fluid spillage into the environment is avoided.

[0038] By being closed and tightened around a transportable tank of polluting fluid, or even around a machine tool, the bottom and side walls of the protection and retention device form an envelope preventing this tank or that of the machine tool from being damaged or punctured, in particular when it is made of synthetic material.

[0039] In this configuration, folded around a transportable tank, the device according to the invention also improves the stability of this tank.

[0040] The device according to the invention makes it possible to protect machine tools or transportable tanks and to preserve the environment from the dispersion of pollutants. The device according to the invention makes the transport of these transportable tanks, machine tools, and tools easier.

[0041] Other objects and advantages of the present invention will become apparent during the following description relating to a given embodiment by way of illustration and not limitation.

[0042] Understanding this description will be facilitated by referring to the accompanying drawings, in which:

[0043] Fig. 1 is a schematic representation of a protection and retention device according to the invention, enveloping a transportable jerrycan-type tank;

[0044] Fig. 2 is a schematic cross-sectional representation of the protection and retention device in a deployed position;

[0045] Figure 3 is a schematic and perspective representation of this protection and retention device in its deployed position.

[0046] Fig. 4 illustrates schematically a machine tool based on the protection and retention device to collect and retain any spillage or overflow of polluting fluid;

[0047] Fig. 5 is a perspective view of the protection and retention device according to the invention;

[0048] Fig. 6 is a detailed view of the protection and retention device according to the invention in a deployed position;

[0049] Fig. 7 is a perspective view of a connecting element provided with a tool-holding device of the protection and retention device according to the invention;

[0050] Fig. 8 is a perspective view of the protection and retention device according to the invention.

[0051] As represented in [Fig.1] of the attached drawing, the present invention relates to a device 1 for the protection and retention of fluid for a tank 2 and / or transportable machine tool containing a fluid, in particular a polluting fluid, of the hydrocarbon or similar type.

[0052] This device 1, according to the invention, essentially comprises a bottom wall 3 having at least two parallel sides 4, 5 on each of which is mounted at least one side wall 6, 7 capable of occupying at least one folded position 9 relative to this bottom wall 3, as shown in [Fig. 1], in the context of a particular application. The side wall 6, 7 can also be capable of occupying at least one extended position 8, visible in Figures 2 to 4.

[0053] Preferably, a side wall 6, 7 is connected by articulation means 10 at the level of one of the parallel sides 4, 5 of the bottom wall 3.

[0054] According to a particular feature of the invention, at least one of the bottom wall 3 and side wall 6, 7 defines a retention tray 11,1 IA, 1 IB. For this purpose, such a bottom wall 3 or side wall 6, 7 has a peripheral rim 12.

[0055] Preferably, this is continuous so as to guarantee the sealing of the tray 11, 11A, 11B.

[0056] In the preferred embodiment illustrated in the drawings, each of the bottom wall 3 and side wall 6, 7 thus defines such a retention tray 11,1 IA, 1 IB, preferably watertight.

[0057] According to the invention, at least one container 11, 1 IA, 1 IB, advantageously each of them, is lined with a fluid retention material 13. Substantially, such a material may be a thick absorbent textile, woven or non-woven, natural, synthetic, or composite, or even an absorbent foam made of synthetic or other material. The characteristics of the retained absorbent material will depend on the nature of the fluids whose retention is to be ensured. In particular, this material will be chosen to be inert with respect to these fluids.

[0058] A container 11,1 IA, 1 IB receiving such a fluid retention material 13 also preferably includes means for retaining 14 of this material in the container 11,1 IA, 1 IB, so as to prevent it from escaping unintentionally and the retained fluid from flowing into nature.

[0059] However, these holding means 14 are designed so as to allow the voluntary removal of this absorbent material 13 from the tray 11,1 IA, 1 IB in order to replace it or to wring it out to collect the fluid or fluids, or the saturated absorbents contained under conditions avoiding any risk of pollution.

[0060] Thus, these retaining means 14 can take the form of retaining lugs arranged internally in the tray 11, 11 A, HB, at the height of their peripheral rim 12 for example.

[0061] According to a preferred embodiment visible in figures 2 and 3, these retention means 14 are in the form of a grid 15 closing at the upper edge 16 a bottom wall 3 or lateral wall 6, 7 in the shape of a tray 11,1 IA, 1 IB. This grid has openings 17 allowing the flow of fluids through it, towards the retention material 13.

[0062] Advantageously, this grid 15 is mounted in a retractable manner, in particular by means of articulation, on this bottom wall 3 or side wall 6, 7.

[0063] In the embodiment shown in the figures of the accompanying drawing, the protective and retention device 1 comprises a rectangular base wall 3 on the parallel longitudinal sides 4, 5 of which are mounted by means of hinges 10 the rectangular side walls 6, 7. Each of these walls, 3, 6, 7, is designed in the form of a tray 11, 1 IA, 1 IB to, in a deployed position 8, define a work surface 18 on which a machine tool, schematically represented in [Fig. 4] as a thermal wood chainsaw, can rest.

[0064] Various maintenance operations can be carried out on such a machine tool, and in particular its filling with operating fluid. When positioned on the worktable 18 corresponding to the device 1 according to the invention, any overflow, leakage or spillage of fluid is collected in one or the other of the tanks 11, 11A, 11B, to be retained there by the fluid retention material 13.

[0065] According to another feature of the invention, the protection and retention device 1 includes sealing cover means 19 at the level of the junction between the walls 3, 6, 7, in particular, in the preferred and illustrated embodiment, at the level of the articulation means 10 for connecting two walls 3,6; 3,7. Such a configuration prevents fluid flows between these walls 3, 6, 7.

[0066] According to a first embodiment, these sealing cover means 19 are designed by a cover rim 20 which comprises, as the case may be, a side wall 6, 7 at least on the side 21 coinciding with one of the parallel sides 4, 5 of the bottom wall 3, as seen in the figures, or, conversely, each of the parallel sides 4, 5 of this bottom wall 3 (solution not shown).

[0067] According to this embodiment, on this lateral side 21 of a lateral wall 6,7, this cover rim 20 takes the form of an inverted gutter fitting into the peripheral rim 12 at the height of one of these parallel sides 4, 5 of the bottom wall 3.

[0068] Advantageously, the articulation means 10 are designed to allow this cover rim 20 to pivot around this rim 12 of the bottom wall 3 when a side wall 6, 7 passes from its deployed position 8 into its folded position 9 and vice versa.

[0069] As can be seen in the figures, extending substantially from the extremities of the lateral side 21 of the side walls 6, 7 are defined C-shaped legs 22 adapted to straddle the rim 12 on one of the parallel sides 4, 5 of the bottom wall 3 in order to plunge into the tray 11 defined by the latter. At their free end, these C-shaped legs 22 cooperate with a pivot axis 23 fitted to the bottom wall 3, particularly at its transverse sides 24. Substantially, this pivot axis 23 is defined, in a preferred embodiment, by a screw-nut assembly which also contributes to a removable assembly of the walls 3, 6, 7.

[0070] In summary, the articulation means 10 are defined by these C-shaped legs 22 equipping the side walls 6,7 and the pivot axes 23 with which the bottom wall 3 is provided.

[0071] The advantage arising from a pivot axis 23 offset internally to the tray 11 defined by the bottom wall 3, consists in the fact that, in the folded position 9, the side walls 6, 7 extend along the lateral edge 25 and above this tray 11 corresponding to the bottom wall 3. Thus, in this folded position 9, any fluid capable of flowing from side walls 6, 7 empties into tray 11 from bottom wall 3, without risk of surrounding pollution.

[0072] Of course, the means for covering the waterproofing 19 at the level of the junction between two walls 3, 6; 3, 7, can take other forms. In particular, a flexible waterproofing overlap strip can extend over the edges 12 adjacent to a parallel side 4, 5 of the bottom wall 3 with a lateral side 21 of a side wall 6, 7.

[0073] Similarly, the means of articulation 10 are capable of adopting other forms of design within the reach of a person skilled in the art, without departing from the spirit of the present invention.

[0074] In the illustrated embodiment, only on the parallel longitudinal sides Side walls 6 and 7 are mounted on the bottom wall 3, 4 and 5. However, it is also possible to imagine that other walls 24 are attached to the transverse sides, walls that can be deployed approximately in the plane of the bottom wall 3 and folded vertically relative to it. In this folded position, the device 1, rather than adopting a U-shaped configuration as seen in [Fig. 1], takes the form of a box capable of surrounding a container, for example, a tank, such as a jerrycan of gasoline or other similar items.

[0075] According to the invention, the protection and retention device 1 further includes closure means 26, such as straps or the like, designed to hold the side walls 6,7 in their folded position 9 above the bottom wall 3, in particular by clamping a machine tool or a transportable tank 2, as seen in [Fig. 1].

[0076] Advantageously, these closing means 26 are provided at the end edge 27, opposite the lateral side 21, of the lateral walls 6, 7.

[0077] It should also be noted that the protection and retention device 1 can be equipped with gripping means 28 to facilitate its transport, in particular in a folded position around a machine tool or a tank 2.

[0078] Substantially, these gripping means 28 can be defined by the closing means 26, in particular in the form of a strap, or by an additional handle, loop or strap equipping the device 1 in an optimized manner with respect to the transport function to be ensured.

[0079] According to a possible additional feature, the device 1 may include a tool holder device 32. The tool holder device 32 may be provided in a side wall 6, 7, preferably in an external face of the side wall 6, 7, i.e. the face of the side wall 6, 7 which is diverted from the machine tool and / or the transportable tank.

[0080] According to one possibility, the closing means 26 may include at least one connecting element 30 positioned above the bottom wall 3 and linking the side walls 6, 7 in their folded position 9 to hold the side walls 6, 7 in their folded position 9. The connecting element 30 may be fixed to the side walls 6, 7.

[0081] The connecting element 30 can act as a stay or brace, holding the side walls 6, 7 in their folded position 9 and preventing them from spreading apart. Thus, the side walls 6, 7 can be locked in their folded position 9. In this configuration, the device 1 becomes easily transportable.

[0082] The connecting element 30 may include a first surface 30a positioned opposite the machine tool or the transportable tank. The first surface 30a may conform to an external face of the machine tool or the transportable tank.

[0083] According to one possibility, the connecting element 30 can be detachable from the other elements of the device 1, in particular detachable from the side walls 6, 7. The connecting element 30 can therefore be attached in a detachable manner to the side walls 6, 7. The connecting element 30 may include reversible fastening means 34. The reversible fastening means 34 allow the connecting element 30 to be attached in a detachable manner to the side walls 6, 7. In the preferred embodiment of the invention, the reversible fastening means 34 may include one or more bolts 35 provided with a shank 37 from which a head 37a protrudes. Device 1 may then include additional reversible fixing means 34a, preferably provided on the side wall(s) 6, 7. The additional reversible fixing means 34a may include one or more fixing rails 36 provided with an open section 38 and a terminal section 39.The fixing rails 36 act as a retaining element to hold the bolt 35 that is inserted into them.

[0084] The diameter of the rod 37 in its cross-section is substantially less than the width of the fixing rail 36. The diameter of the head 37a, in its cross-section, is greater than the diameter of the rod 37 in its cross-section and / or greater than the width of the fixing rail 36.

[0085] The mounting rail(s) 36 can be arranged on an inner face of the side wall 6, 7 positioned opposite the machine tool or the transportable tank, when the side wall 6, 7 is in the folded position 9. The mounting rail(s) 36 can be formed in the side wall 6, 7, preferably on the inner face of the side wall 6, 7. Alternatively, the device 1 can include an add-on 40 fixed to the side wall 6, 7, preferably on the inner face of the side wall 6, 7. The mounting rail(s) 36 can be formed in the add-on 40. One or more mounting rail(s) 36 can be formed in the same add-on 40. The side wall 6, 7 can include a obviously 41, the added part 40 being fixed to The side wall opposite the recess 41. The added piece 40 may be panel-shaped and preferably made of a metallic material. The rail(s) 36 may be formed in the added piece 40 by milling, for example.

[0086] To fix the connecting element 30 to the side walls 6, 7 using the reversible fastening means 34 and the complementary reversible fastening means 34a, the bolt(s) 35, preferably a portion of the shank 37 adjacent to the head 37a of the bolt(s) 35, is / are inserted into the protruding section 38 of the fixing rail(s) 36 through an opening 38a in the protruding section 38 of the fixing rail 36 and then slid to the end section 39 of the respective fixing rail 36. The end section 39 may include a semi-circular end housing 39a. In the folded position 9 of the side walls 6, 7, the semicircle of the terminal housing 39a can be opened upwards, so that the part of the rod 37 near the head 37a of the bolt 35 rests in the terminal housing 39a and is held there by the gravity of the connecting element 30.When the rails 36 are formed in the insert 40, the heads 37a can preferentially slide along the insert 40 in the recess 41 when the bolts 35 are inserted into the respective rail 36.

[0087] In the preferred embodiment of the invention, the fastening means 34 may include four bolts 37, two bolts 37 respectively protruding from the connecting element 30 on either side of the connecting element 30 by their heads 37. The complementary reversible fastening means 34a then include four fastening rails 36, two fastening rails 36 being respectively arranged in each side wall 6, 7.

[0088] The fixing rail(s) 36 may have an L-shape. The end section 39 and / or end housing 39a on the one hand and the opening section 38 and / or the opening 38a on the other hand may be arranged at the ends of the L. The fixing rails 36 may be parallel to each other in the folded position 9 of the side walls 6, 7.

[0089] The opening 38a of the through section 38 can be positioned on a lateral side 6a, 7a of the side walls 6, 7 which extend orthogonally to the parallel sides 4, 5 of the bottom wall 3 and / or to the lateral side 21. The opening 38a of the through section 38 can open outwards from the device 1. The end section 39 can extend parallel to the lateral side 6a, 7a of the side walls 6, 7 and orthogonally to the parallel sides 4, 5 of the bottom wall 3. The end section 38 can extend orthogonally to the lateral side 6a, 7a of the side walls 6, 7 and parallel to the parallel sides 4, 5 of the bottom wall 3. The end housing 39a can be positioned at the end of the terminal section 39 located closest to the bottom wall 3.

[0090] According to a possible additional feature, the tool holder 32 can be made in the form of a connecting element 30 and be provided with reversible fastening means 34 by means of which it can be detachably attached to the side walls 6, 7. The reversible fastening means 34 can include one or more bolts 35. In other words, the functions of the tool holder 32, which is able to receive one or more tools, and of the connecting element 30, which is able to hold the side walls 6, 7 in their folded position 9, can be combined into a single element. The tool holder 32 can be provided with at least one compartment 31 for receiving a tool. The compartment 31 can be adapted to receive a tool, such as a hand tool like a screwdriver, such as an axe or hatchet, or such as a wedge of the type used for splitting wood. The compartments 31 can be configured according to the needs of the worksite..

[0091] The compartment 31 can preferably be arranged so that the tool received in it is accessible from outside the device 1 when the side walls 6, 7 take the folded position 9.

[0092] According to one possibility, the bottom wall 3 can be rectangular in shape, with side walls 6, 7 mounted on the parallel longitudinal sides 4, 5. The connecting element 30 can be arranged on the transverse sides 24.

[0093] The side wall 6, 7 may be provided with a shoulder 33 arranged on the opposite side of the bottom wall 3 and projecting towards the machine tool and / or the portable tank and / or the other side wall 6, 7 in order to retain the machine tool and / or the portable tank in the device 1. Preferably, the shoulder 33 is retractable. Thus, the shoulder 33 can form a retractable angular stop.

[0094] The protective and restraint device 1 may include a carrying strap (not shown in the figures) preferably arranged so as to allow the device 1 to be attached to a person's back, like a backpack for example. Thus, the person may carry three such devices 1, one device 1 being attached to the person's back and one device 1 being carried in each of the person's hands.

[0095] If, advantageously, the walls 3, 6, 7, or the grids 15, which make up the device 1, are made of a metal strip, particularly stainless steel, cut, stamped and / or bent and / or welded, it is also possible to design these walls 3, 6, 7 and the grids 15 from a synthetic or composite material. In all cases, this material will be chosen according to its impact resistance and its inertness to the fluids to be retained.

[0096] The advantages arising from the present invention are apparent from the preceding description. In particular, this protection and containment device constitutes an advantageous solution to the risks of abandonment of soiled absorbent materials or of dispersion into the environment of polluting fluids in the use of machine tools, particularly those with internal combustion engines, on construction sites, grounds maintenance or forestry operations.

Claims

Claims

1. Device for protecting and transporting a machine tool or a transportable tank, comprising a bottom wall (3) comprising at least two parallel sides (4, 5) on each of which is mounted at least one side wall (6, 7) capable of occupying at least one folded position (9) relative to this bottom wall (3), the protection and transport device further comprising a tool-holder device (32) provided with at least one compartment (31) allowing the reception of a tool, characterized in that the compartment (31) is arranged so that the tool received in the compartment (31) is accessible from outside the device (1) when the side wall (6, 7) takes the folded position (9).

2. Device according to claim 1, characterized in that it comprises at least two side walls (6, 7) and further closing means (26) designed to hold the side walls (6, 7) in their folded position (9) above the bottom wall (3).

3. Device according to the preceding claim, characterized in that the closing means (26) comprise at least one connecting element (30) positioned above the bottom wall (3) and connecting the side walls (6, 7) in their folded position (9) to maintain the side walls (6, 7) in their folded position (9).

4. Device according to the preceding claim, characterized in that the bottom wall (3) is rectangular in shape, in that on the parallel longitudinal sides (4, 5) side walls (6, 7) are mounted and in that the connecting element (30) is arranged on the transverse sides (24).

5. Device according to any one of claims 3 or 4, characterized in that the connecting element (30) comprises the tool-holder device (32).

6. Device according to any one of the preceding claims, characterized in that the tool-holding device (32) is secured to the side wall (6, 7) and / or the bottom wall (3).

7. Device according to any one of the preceding claims, characterized in that the device is further a fluid retention device, the machine tool or the transportable tank containing at least one fluid, in particular a pollutant, such as gasoline, oil or the like, characterized in that the wall lateral (6, 7) is further capable of occupying at least one deployed position (8) in the plane of the bottom wall (3) to define a work surface (18).

8. Device according to any one of the preceding claims, characterized in that at least one of the bottom (3) and side (6, 7) walls defines a retention tank (11, 1 IA, 1 IB).

9. Device according to claim 2, characterized in that a bottom wall (3) or side wall (6, 7) has a continuous peripheral rim (12) so as to guarantee sealing to the retention tank (11, 11 A, 11B).

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