FR3071805A1 - CHARIOT ON CASTERS, IN PARTICULAR FOR BAKERY - Google Patents

Abstract

Trolley on wheels (1) comprising: - at least two vertical ladders (2), each comprising two vertical uprights (21), assembled by horizontal crosspieces (22), - at least two lower spacers (3) arranged at the bottom vertical ladders (2) and connecting said vertical ladders (2), - at least two upper struts (5) arranged in the upper part of the vertical ladders (2) and connecting said vertical ladders (2), - a plurality of rollers ( 41), fixed at the level of the lower struts, wherein at least one of said struts is connected to the vertical ladders (2) via at least one fastening bracket (6), comprising a first branch (61) penetrating into a tubular section (ST1) of a vertical upright (21), or a spacer, and a second wedge attachment branch (62) engaging in a tubular section (ST1) provided on a spacer, or a vertical upright (21) .

Description

The present invention relates to a trolley on casters, comprising at least two vertical ladders assembled by at least two lower spacers arranged in the lower part of the ladders and two upper spacers arranged in the upper part of the ladders to keep them parallel to each other, each ladder comprising two vertical uprights assembled by crosspieces.

The field of the invention is that of trolleys on casters used to carry out various handling operations, during the production of food products. More particularly, the invention is in the field of trolleys on casters used in bakery or pastry making, such a trolley being provided for receiving a bakery or pastry product during the various stages of its production: pushing the dough, cooking, storage etc. Such carts on casters are commonly used for various handling operations, during the production of food products. As is well known, such trolleys on casters are in the form of one-piece trolleys made of mechanically welded sections, as described in document FR 2 532 265. Such a trolley has the major drawback of not being removable, its transport empty being therefore tedious and generating significant costs, because of the large empty volume that represents such carts.

In order to overcome this drawback, removable carts have been designed. Such demountable carriages consist essentially of cart modules which can be stacked by interlocking male / female parts and by screwing. Such carts are generally long and tedious to assemble, and their cost is often high.

Document FR 3 031 715 also discloses a trolley on casters, comprising two vertical scales assembled by two lower struts arranged in the lower part of the scales and two upper struts arranged in the upper part of the scales to keep them parallel to each other, each scale comprising two uprights assembled by crosspieces.

Fe trolley on casters described in this document includes connecting pieces at the ends of the spacers to ensure the assembly of the uprights of said scales with said spacers.

As visible in FIGS. 2 to 5 of document FR 3 031 715, said junction piece 6 comprises a female end piece 8 extending along a vertical axis A to receive by interlocking the corresponding end of one of the uprights 4 of said scales 2 .

Said female end piece 8 of said junction piece 6 comprises a cavity 9 open on an orifice 9a, the periphery of which corresponds to the cross section of the uprights 4, and clamping means 10, comprising a central stud 12 extending along said axis A, said central stud 12 being provided with radial protrusions 13 extending in the direction of said cavity 9 to delimit said annular housing 11.

Said clamping means 10 are arranged in the internal volume of said cavity 9 to form a male end piece, said clamping means 10 being arranged to delimit with said cavity 9 an annular housing 11 of width L less than the thickness of the hollow profiles of said uprights 4 to form a rigid and removable mechanical connection by interlocking without play.

Said female end piece 8 also includes in its cavity 9 bosses 14 extending parallel to said axis A so as to project into said annular housing

11.

Finally, said junction piece 6 has a bore 17 extending along said axis A, opposite the female end piece 8, designed to receive by interlocking the support of a caster 7.

Such a carriage, although it allows rapid assembly between the vertical scales and the spacers, has the major drawback that the assembly between the vertical scales and the spacers is not very resistant over time, because the latter rests solely on elastic deformation of parts nested one inside the other.

However, the elastic deformation capacity of a part over time tends to decrease, and as a result the assembly between the parts is no longer as resistant. In addition, to regain the original strength of the assembly, one can only consider changing at least one of the parts constituting the assembly, which turns out to be tedious and expensive.

Thus, the invention proposes to overcome this drawback by proposing a trolley on casters, in particular used for handling operations during the production of bakery or pastry products, resulting from an assembly of several elements, allowing a simple, fast and reliable assembly of the different elements.

To this end, the invention relates to a trolley on casters comprising:

- at least two vertical ladders, each ladder comprising two vertical uprights, in particular in the form of hollow profiles, assembled by horizontal crosspieces,

- at least two lower spacers, arranged in the lower part of the vertical scales and connecting said at least two vertical scales,

- at least two upper spacers, arranged in the upper part of the vertical scales and connecting said at least two vertical scales,

- A plurality of rollers, fixed at the level of the lower spacers, in which at least one of said lower and / or upper spacers is connected to the vertical ladders by means of at least one fixing bracket, said fixing bracket comprising a first branch penetrating into a tubular section of a vertical upright, according to a first possibility or a tubular section formed on an upper or lower spacer, according to a second possibility, and a second corner effect fixing branch, of axis A, engaging in a tubular section formed on an upper or lower spacer, along the axis A of said second corner-effect fixing branch, according to the first possibility, or in a tubular section of the vertical upright according to the second possibility, and in which the second corner-effect fixing branch of said fixing bracket comprises a part f ixed relative to the first branch and a part movable relative to the fixed part, when driven by the actuation of a clamping means, said fixed part and said movable part being in abutment against each other by the intermediate of two sliding faces, inclined relative to the axis A, the implementation of the clamping means causing the displacement of the movable part relative to the fixed part, in the direction of the sliding faces, configured so that the second branch of said bracket finds itself immobilized by wedge effect in the tubular section during the implementation of the clamping means.

According to optional features of the invention, taken alone or in combination:

- The clamping means comprises a threaded rod extending along the axis A, terminated by a clamping head, immobilized in translation relative to the fixed part of the second fixing branch by wedge effect, in particular through a shoulder formed in the fixed part of the second corner-effect fixing branch, the threaded rod cooperating by screwing with a thread formed in the movable part of the second corner-effect fixing branch, in order to ensure the displacement of the movable part relative to the fixed part of the second fixing branch by wedge effect.

- The lower spacer is a profile comprising the first tubular section in which is fitted the second branch of the fixing bracket according to the first possibility or the first branch according to the second possibility, said profile defining two parallel grooves, located under the first tubular section, when the carriage is placed on its wheels, designed to receive in sliding the lateral edges of a fixing plate of a caster system, comprising said caster, the lower spacer being provided with rapid sliding blocking means ensuring the axial stop of the fixing plate in the profile.

- The profile forming the lower spacer comprises the first tubular section of rectangular shape in which is fitted the second branch of the fixing bracket according to the first possibility or the first branch according to the second possibility, arranged in the center of the profile, and a semi-circular wall connecting the two parallel grooves, located under the first tubular section, intended to receive in sliding the lateral edges of a fixing plate of a caster system, the first tubular section being adjacent to the semi wall -circular, on its concave surface.

The rapid locking means comprise a flexible stop tab fixed to said lower spacer, said stop tab comprising a first stop wall provided for ensuring the axial stop of the fixing plate of the caster system, in a first direction, along the longitudinal axis of the lower spacer coming to bear against an edge of said fixing plate, said first stop wall being connected to a projecting actuating tab, which when manipulated is configured to deforming the stop tab in order to retract said first stop wall and authorize the release of said fixing plate from the two parallel grooves.

- The rapid locking means comprise a second stop wall, integral with said lower spacer, provided to ensure the axial stop of the fixing plate of the caster system, in a second direction, along the longitudinal axis of the lower spacer coming to bear against an edge of said fixing plate.

- The profile forming the lower spacer comprises a semi-tubular section of rectangular shape, disposed under the first tubular section, forming a grip groove intended to receive, detachably or not, the stop tab and / or the second barrier wall.

the semi-circular wall and the first tubular section of the profile forming said lower spacer define two parallel housings, opening at a longitudinal end of the lower spacer, the two housings being designed to receive two legs of a stopper, the two tabs of the stopper being connected by a wall in order to define a cavity, provided for receiving and enclosing the fixing bracket so as to protect said fixing bracket and the lower spacer from shocks.

- The stopper is made of synthetic material, in particular flexible silicone.

- At least one vertical ladder comprises a stiffening spacer, arranged in the upper part and / or in the lower part of said vertical ladder, the stiffening spacer being in the form of a profile, designed to be fixed at the uprights vertical of said vertical ladder by means of fixing means complementary to said profile.

The invention also relates to a kit suitable for the manufacture of a trolley on casters according to the invention comprising, in the disassembled state:

- at least two vertical ladders, each ladder comprising two vertical uprights, in the form of hollow sections, assembled by horizontal crosspieces,

- at least two lower spacers, intended to be arranged in the lower part of the vertical ladders and intended to connect said at least two vertical ladders,

- at least two upper spacers, intended to be arranged in the upper part of the vertical ladders and intended to connect said at least two vertical ladders,

- a plurality of rollers, fixed at the level of the lower spacers,

- At least one fixing bracket intended to connect one of said lower and / or upper spacers to the vertical scales, said fixing bracket comprising a first preassembled branch, penetrating into a tubular section of a vertical upright, according to a first possibility or a section tubular formed on an upper or lower spacer, according to a second possibility, and a second corner effect fixing branch, of axis A, intended to engage in a tubular section formed on an upper or lower spacer, according to the axis A of said second corner-effect fixing branch, according to the first possibility, or in a tubular section of the vertical upright according to the second possibility, the second corner-effect fixing branch of said fixing bracket comprising a fixed part with respect to the first branch and a movable part with respect to the first part, driven by the actuation of a clamping means, said fixed part and said movable part being in abutment against each other by means of two sliding faces, inclined with respect to the axis A, the setting implementation of the clamping means causing the displacement of the movable part relative to the fixed part, in the direction of the sliding faces, configured so that the second branch of said bracket is immobilized by wedge effect in the tubular section during of the implementation of the clamping means.

The invention will be better understood on reading the following description accompanied by the drawings among which:

- Figure 1 is a perspective view showing a trolley on casters according to an embodiment of the invention,

- Figure 2 is an exploded perspective detail view of the assembly of a caster system on a lower spacer and the assembly of the fixing bracket with the same lower spacer of a carriage according to a method of realization of the invention,

FIG. 3a is a first perspective view of a bracket for fixing the carriage according to an embodiment of the invention,

FIG. 3b is a second perspective view of a bracket for fixing the carriage according to an embodiment of the invention,

FIG. 4 is a detailed perspective view of a stop tab according to an embodiment of the invention,

FIG. 5 is a detailed perspective view of a stopper according to an embodiment of the invention,

FIG. 6 is a perspective view of the assembly between a fixing bracket, a lower spacer and an assembly key, these three elements being assembled,

FIG. 7 is a perspective view in transparency of the assembly between a vertical upright of a vertical ladder and an upper spacer by means of a fixing bracket,

FIG. 8 is a perspective view of a profile constituting a lower spacer according to an embodiment of the invention,

- Figure 9 is a detailed perspective view of the assembly between a vertical upright of a vertical ladder and a lower spacer by means of a fixing bracket.

The invention therefore relates to a trolley on casters 1 comprising:

at least two vertical scales 2, each scale 2 comprising two vertical uprights 21, in particular in the form of hollow sections, assembled by horizontal crosspieces 22,

at least two lower spacers 3, arranged in the lower part of the vertical scales 2 and connecting said at least two vertical scales 2,

at least two upper spacers 5, disposed in the upper part of the vertical scales 2 and connecting said at least two vertical scales 2,

- A plurality of rollers 41, fixed at the level of the lower spacers 3, in which at least one of said lower spacers 3 and / or upper 5 is connected to the vertical ladders 2 by means of at least one fixing bracket 6, said fixing bracket 6 comprising a first branch 61 penetrating into a tubular section STI of a vertical upright 21, according to a first possibility or a tubular section STI formed on an upper 5 or lower spacer 3, according to a second possibility, and a second branch 62 for corner effect fixing, axis A, engaging in a tubular section STI formed on an upper spacer 5 or lower 3, along the axis A of said second branch 62 for fixing by corner effect, according to the first possibility , or in a tubular section STI of the vertical upright 21 according to the second possibility.

Advantageously, the second branch 62 for fixing by wedge effect of said fixing bracket 6 comprises a fixed part 62f relative to the first branch 61 and a mobile part 62m relative to the fixed part 62f, driven by the actuation of a clamping means 63, said fixed part 62f and said movable part 62m being in abutment against one another by means of two sliding faces F1, F2, inclined relative to the axis A.

The implementation of the clamping means 63 thus causes the displacement of the mobile part 62m relative to the fixed part 62f, in the direction DF of the sliding faces, configured so that the second branch 62 of said bracket 6 is immobilized by wedge effect in the tubular section STI during the implementation of the clamping means 63.

Thanks to this advantageous arrangement according to the invention, the fixing of a vertical upright 21 of a vertical ladder 2 to an upper spacer 5 or to a lower spacer 3 is simple, quick and particularly reliable.

In fact, as can be seen in the embodiment of FIG. 7 or 9, to assemble a vertical upright 21 with a vertical ladder 2, for example with a lower spacer 3 or upper 5, it suffices by example for an operator to introduce the second branch 62 of said fixing bracket 6 into the tubular section STI of T lower spacer 3 or upper spacer 5, then to implement the clamping means 63 until the second branch 62 is found immobilized in the tubular section STI of the upper spacer 5. The first branch 61 is preferably pre-assembled in the section STI of the vertical upright 21, that is to say, during the manufacture of the suitable kit for the production of the carriage 1 according to the invention in the workshop.

In addition, the force exerted by the mobile part 62m in the tubular section STI in order to secure the fixing bracket 6, depends directly on the relative position of the mobile part 62m relative to the fixed part 62f of the second branch of the fixing bracket 6, according to Tax B, which is dependent on the movement printed by the clamping means 63.

Thus, the assembly force between the fixing bracket 6 and the vertical upright 21, or the upper spacer 5, or the lower spacer 3 can be precisely adjusted in order, for example, to adjust the rigidity of assembly.

In addition, this arrangement makes it possible to facilitate the maintenance of such an assembly, because in the event of a reduction in the assembly force between the fixing bracket 6 and the tubular section STI, it is enough for an operator to put again implement the clamping means to find a satisfactory assembly force.

The fixing of the first branch 61 in the tubular section STI of a vertical upright 21, according to the first possibility, or in the tubular section of a spacer according to the second possibility, can be obtained by a conventional assembly, such as welding, force fitting, or screw / nut system, and preferably in a pre-assembled manner, that is to say during the manufacture of the elements of the kit suitable for producing the carriage 1 according to the invention.

Advantageously, the movement of the movable part 62m relative to the fixed part 62f of the second branch 62 of the fixing bracket 6 is provided in the direction DF of the sliding faces Fl, F2. As can be seen in FIGS. 3a and 3b, the direction DF of the sliding faces F1, F2 may correspond to a direction intermediate between the longitudinal axis A at the second branch 62 and an axis B perpendicular to this axis A, corresponding for example substantially to the direction according to the inclination of the sliding faces F1, F2 relative to the axis A. For this purpose, the sliding faces F1, F2, by means of which the fixed part 62f and the mobile part 62m are in support one on the other, are mutually parallel, as visible in the embodiments of Figures 1, 3, 4 and 5.

According to one embodiment, the clamping means 63 comprises a threaded rod 64 extending along the axis A, terminated by a clamping head 65, immobilized in translation relative to the fixed part 62f of the second attachment branch 62 by corner effect, in particular by means of a shoulder 66 formed in the fixed part 62f of the second branch 62 for fixing by corner effect.

The threaded rod 64 cooperates by screwing with a thread 67 formed in the mobile part 62m of the second branch 62 for fixing by corner effect, in order to ensure the displacement of the mobile part 62m relative to the fixed part 62f of the second branch 62 fixing by corner effect, in the direction DF of the sliding faces F1, F2.

The tightening is obtained by the rotation of the tightening head 65. For this purpose, the tightening head 65 can have an imprint for a tool (screwdriver, hexagon wrench ...). During rotation, the clamping head 65, pressing on the shoulder 66 constrains the movable part 62m to approach, which causes the sliding of the movable part 62m along the fixed part 62f in the direction DF imposed by the sliding faces F1, F2, and thus clamping by wedge effect.

As can be seen, for example, in the embodiment of FIG. 7, the second branch 62 of the fixing bracket 6, and in particular the movable part 62m of the second branch, can be a part of identical section (to the set of close fitting) to the tubular section STI, so that the mobile part 62m remains stationary in rotation relative to the fixed part 62f, after having entered the tubular section STI.

According to one embodiment, the lower spacer 3 is a profile 31 comprising the tubular section STI, called the first tubular section STI, in which the second branch 62 of the fixing bracket 6 is fitted according to the first possibility (or the first branch 61 according to the second possibility).

This profile 31 defines two parallel grooves 32, located under the first tubular section STI (when the carriage rests on its casters). These grooves 32 are provided for receiving respectively in sliding the lateral edges 44 of a fixing plate 43 of a caster system 4, comprising said caster 41. The lower spacer 3 is provided with means 7 for rapid sliding locking ensuring the axial stop of the fixing plate 43 in the profile 31.

This advantageous arrangement of the invention also allows simple and rapid mounting of a caster system 4 on a lower spacer 3 of the carriage 1 according to the invention, and therefore participates in the simple and rapid mounting of the carriage on casters 1 according to the invention.

As can be seen in the embodiment of FIG. 2, the caster system 4 advantageously comprises at least one caster 41 received between two arms of a yoke 42. The yoke 42 is preferably mounted, pivotally, on said fixing plate 43, which can essentially consist of a flat wall 43.

According to one embodiment, the profile 31 forming the lower spacer 3 comprises the first tubular section STI of rectangular shape in which is fitted the second branch 62 of the fixing bracket 6 according to the first possibility or the first branch 61 according to the second possibility, arranged in the center of the profile, and a semi-circular wall 33 connecting the two parallel grooves 32, located under the first tubular section STI, the first tubular section STI being adjacent to the semicircular wall 33, on its concave surface SC33.

As can be seen in the embodiment of FIG. 8, the section 31 forming the lower spacer 3 can have a longitudinal plane of symmetry P31. It is thus understood that the fact that the first tubular section STI is disposed at the center of the section 31 corresponds to the fact that said first tubular section STI is arranged at the level of the longitudinal plane of symmetry P31 of the section 31, see that said longitudinal plane of symmetry P31 also constitutes a longitudinal plane of symmetry of the first tubular section STI.

As can be seen in the exemplary embodiments of FIGS. 2, 8 and 9, the profile 31 constituting the lower spacer 3 is shaped so that the assembly of the fixing bracket 6 to the lower spacer 3 and the assembly d 'a caster system 4 at said lower spacer 3, close to said lower spacer 3, are independent, that is to say that there is no particular order to be observed for carrying out the assembly of these different elements on the lower spacer 31. It is thus possible to dismantle the caster systems 4 of the lower spacers 3 of the carriage 1, advantageously without having to dismantle the brackets 6 of said lower spacers 3.

As can be seen in the embodiment of FIG. 7, an upper spacer 5 can consist of a section 5, in particular a metal section, of substantially rectangular section corresponding to the first tubular section STI.

According to an advantageous embodiment, the quick-locking means 7 comprise a flexible stop tab 71 fixed to said lower spacer 3, said stop tab 71 comprising a first stop wall 72 provided for stopping axial of the fixing plate 43 of the caster system 4, in a first direction, along the longitudinal axis A31 of the lower spacer 3 coming to bear against an edge of said fixing plate 43. As illustrated in FIG. 2 , this first stop wall 72 prohibits, once the plate 43 inserted in the grooves 32, the withdrawal of the caster system 4 by a longitudinal end EX31 of the profile 31 forming the lower spacer 3. This first stop wall 72 is connected to an actuating tab 74, projecting from the longitudinal end EX31 of the section 31 forming the lower spacer 3. When manipulated, the actuating tab 74 is configured to deform the stop tab 71 in order to retract said first stop wall 72 beyond the fixing plate 43, thereby authorizing the release of said fixing plate 43, by sliding along the grooves 32.

Preferably, said stop tab 71 is fixed to the lower spacer 3 by a fixing means such as screws, rivets or the like. This fastening means does not need to be removed to disassemble the caster system 4.

Advantageously, said stop tab 71 is a part made of metal or plastic material, for example in the form of a folded sheet, dimensioned so as to have sufficient elasticity so that an operator can retract said first stop wall. 72 by simple pressure on the actuating tab 74.

According to one embodiment, the quick-locking means 7 comprise a second stop wall 73, secured to said lower spacer 3, designed to ensure the axial stop of the fixing plate 43 of the caster system 4, in a second direction, along the longitudinal axis A31 of the lower spacer 3 coming to bear against an edge of said fixing plate 43.

As can be seen in the embodiment of Figures 2 and 4, said second stop wall 73 can for example be formed directly on the stop tongue 71 in order to facilitate the assembly operations of the carriage 1. According to this embodiment illustrated in FIG. 4, the first stop wall 72 and the second stop wall 73 can be carried by the same part (ie the stop tab 71)

Alternatively, said second stop wall 73 can be formed by a separate element from the stop tab 71, and can be formed directly on the lower spacer 3.

To carry out the assembly of a caster system 4 on the lower spacer 3, an operator therefore performs the following operations, said stop tab 71 being previously fixed on the lower spacer 3:

- pressure on the actuating tab 74 in order to retract the first stop wall 72,

- facing the lateral edges 44 of the fixing plate 43 of the caster system 4 with the parallel grooves 32 of the profile 31, at a longitudinal end EX 31 of the profile 31,

- sliding in the direction of the axis A31 of the section 31 of the fixing plate 43 in the parallel grooves 32 until said fixing plate 43 abuts against the second stop wall 73,

- release of the actuating tab 74 so that the first stop wall 72 comes to block the movement in translation along the axis A31 of the profile 31 of the fixing plate 43.

In order to carry out the disassembly of the caster system 4 from the lower spacer, the operator performs the reverse operations.

According to one embodiment, the profile 31 forming the lower spacer 3 comprises a semi-tubular section ST2 of rectangular shape, arranged under the first tubular section STI forming a grip groove 36 intended to receive, in such a way, the tongue d stop 71 and / or the second stop wall 73.

As can be seen in the exemplary embodiments of FIGS. 8 and 9, the attachment groove 36 may have two parallel grooves 35 intended to receive the two edges of a fixing part 75 of the stop tab 71 and / or the second stop wall 73.

As explained above, the semi-tubular section ST2 is arranged under the first tubular section STI, in a substantially vertical direction, when the carriage is in a standing position, resting on the ground by means of the caster systems 4, such as visible in particular in the embodiment of FIG. 1.

By semi-tubular is meant that said section ST2 is a tubular section, with one wall less. As can be seen in the embodiment of FIG. 8, said section ST2 can be shaped like a longitudinal groove of section substantially in the form of a U, or also of a T, said U, respectively said T, being open towards the lower part of the section 31 forming the lower spacer 3 (when the carriage 1 is placed on its rollers 41).

As can be seen in the embodiment of FIG. 8, the semi-tubular section ST2 can be arranged according to Tax A31 of the profile 31 in the extension of the first tubular section STI. It is dimensioned and positioned on the profile so as to allow the sliding of the fixing plate 43 in the parallel grooves 32, without constituting an obstacle to sliding.

According to one embodiment, the semi-circular wall 33 and the first tubular section STI of the section 31 forming said lower spacer 3 define two parallel housings 34, opening at a longitudinal end EX31 of the section 31, the two housings 34 being designed to receive, at the interlocking game, two legs 81 of a stopper 8, the two legs 81 of the stopper 8 being connected by a wall 82 in order to define a cavity 83, designed to receive and grip the fixing bracket 6 so as to protect said fixing bracket 6 and the lower spacer 3 from shocks.

Such a stopper 8 also advantageously constitutes a cover closing the mouth of the profile, thus improving the aesthetics of the assembly.

As can be seen in the embodiment of FIG. 5, the tabs 81 of the stopper 8 can have a section, for example in a quarter of a circle, corresponding substantially to the section of the parallel housings 34.

These tabs 81 can even be dimensioned in such a way that they must be mounted slightly by force in the housings 34 of the profile 31, in order to maintain said stopper 8 in the profile 31.

In addition or as an alternative, fixing means, for example removable fixing means, such as fixing screws, can also be provided in order to ensure the fixing of said tabs 81 of the stopper 8 in the parallel housings 34 of said section.

Advantageously, as visible in the embodiment of Figures 5 and 6 the stopper can be dimensioned so as to grip the fixing bracket 6 only at the branch 61, 62 intended to be fitted into the first tubular section STI of the section 31 constituting said lower spacer 3.

To this end, the wall 82 can be flexible, to allow the legs 81 of the stopper 8 to be moved apart in order to facilitate the positioning of the legs 81 and of the cavity 83 around the fixing bracket 6.

A bore (not shown) may be provided in stopper 8, in particular on the wall 82, in order to allow access to the clamping means 63 of the second branch 62 of the fixing bracket 6 after mounting of said stopper 8 on the fixing bracket, in particular to the clamping head 65 in the case where the clamping means 63 is a threaded rod 64.

According to one embodiment, the stopper 8 is made of synthetic material, in particular flexible silicone.

A synthetic material, such as flexible silicone, has the advantage of combining elasticity, a coefficient of friction with the material of Γ spacer 3, in particular when the latter consists of a metal section 31, and a satisfactory resilience for that the stopper 8 can be properly retained in the lower spacer 3, while providing good capacity for impact resistance and good mountability around the fixing bracket 6.

According to one embodiment, at least one vertical ladder 2 comprises a stiffening spacer 23, disposed in the upper part and / or in the lower part of said vertical ladder 2, the stiffening spacer 23 being in the form of a profile 23 , provided to be fixed at the vertical uprights 21 of said vertical ladder 2 by means of fixing means of complementary shape to said profile 23.

Such a stiffening spacer 23 serves to stiffen the upper part and / or the lower part of a vertical ladder 2, in particular after the fixing brackets 6 have been placed in the upper part and / or in the lower part of said vertical ladder 2, which leave a large empty space between the two vertical uprights 21 of said vertical ladder 2.

As shown in the example of embodiment in Figure 1, the stiffening spacer

23 may be in the form of a profile 23, in particular a metal profile, of rectangular section.

Advantageously, the fixing means are provided on the fixing bracket 6, for example on the first branch 61, intended to be inserted in a profile constituting a vertical upright 21 of a vertical scale 2.

According to a first embodiment, the fixing means consists of a housing of complementary shape to the section of the section 23, internally receiving and maintaining the said section 23.

According to a second embodiment, the fixing means consists of a fixing stud, projecting from a flat face of the fixing bracket 6, of shape complementary to the section of the section 23, receiving externally and maintaining said section 23.

Advantageously, fixing means can be provided on two parallel faces of the fixing bracket 6 so that the same fixing bracket 6 can be used at any vertical upright 21 of the vertical ladder 2.

Alternatively, the fixing means may be provided only on one side of the fixing bracket 6 in order to constitute a polarizing device allowing an operator to ensure that the mounting of the carriage on casters 1 is carried out properly, in particular that the first branch 61 and the second branch 62 of the fixing bracket 6 have been introduced where necessary, ie at the level of a lower spacer 3 or upper 5 or at the level of a vertical upright 21.

According to one embodiment, a roof 52 can also be fixed in the upper part of the carriage 1, for example on the upper spacers 5 by means of fixing means (not shown).

Such a roof 52 makes it possible to protect the contents of the carriage from elements penetrating from above and to stiffen the carriage 1.

According to one embodiment, at least one horizontal crosspiece 22 of a vertical scale 2 is constituted by a profile 22 of L-shaped section, fixed on the two vertical uprights 21 of said scale 2.

As can be seen in the exemplary embodiments of FIG. 1, said profile 22 can be a metal profile.

Said profile can be fixed in a removable manner or not to the vertical uprights 21 of the vertical ladder 2, by any means known to those skilled in the art, such as welding, fixing screws, etc.

The invention also relates to a kit suitable for the manufacture of a trolley on casters according to one of the embodiments described above comprising, in the disassembled state:

at least two vertical scales 2, each scale 2 comprising two vertical uprights 21, in the form of hollow profiles, assembled by horizontal crosspieces 22,

- at least two lower spacers 3, designed to be arranged in the lower part of the vertical ladders 2 and connect said at least two vertical ladders 2,

at least two upper spacers 5, intended to be arranged in the upper part of the vertical ladders 2 and to connect said at least two vertical ladders 2,

a plurality of rollers 41, intended to be fixed at the level of the lower spacers 3,

- At least one fixing bracket 6 provided intended to connect one of said lower spacers 3 and / or upper to the vertical scales 2, said fixing bracket 6 comprising a first preassembled branch 61 penetrating into a tubular section STI of a vertical upright 21 , according to a first possibility or a tubular section STI formed on an upper spacer 5 or lower 3, according to a second possibility, and a second branch 62 for fixing by wedge effect, of axis A, intended to engage in a STI tubular section made on an upper 5 or lower 3 spacer, according to Tax A of said second branch 62 for fixing by wedge effect, according to the first possibility, or in a STI tubular section of the vertical upright 21 according to the second possibility.

The second branch 62 for fixing by wedge effect of said fixing bracket 6 comprises the fixed part 62f relative to the first branch 61 and a movable part 62m relative to the first part 62f, driven by the actuation of a clamping means 63, said fixed part 62f and said movable part 62m being in abutment Tune on the other by means of two sliding faces F1, F2 inclined with respect to

Tax A. The implementation of the clamping means 63 causing the moving part 62m to move relative to the fixed part 62f, in the direction DF of the sliding faces F1, F2, configured so that the second branch 62 of said square 6 is found immobilized by wedge effect in the tubular section STI during the implementation of the clamping means 63.

Such a kit can also include one or more of the constituent elements of the carriage 1 according to the different embodiments described above.

All of the features of the carriage 1 according to the different embodiments described above apply to the kit according to the invention.

Such a kit makes it possible to optimize the handling of a trolley on casters, in that it makes it possible to avoid transporting a large quantity of empty volumes when the trolley 1 is in the disassembled state.

Furthermore, as for the carriage 1 according to the various embodiments described above, such a kit makes it possible to obtain a carriage which is simple and quick to assemble, while guaranteeing reliable assembly over time of the various elements.

Naturally, other embodiments could have been envisaged by the skilled person without departing from the scope of the invention as defined by the claims below.

NOMENCLATURE

1. Trolley on wheels

2. Vertical scale

21. Vertical upright

22. Horizontal rail

23. Rigidization spacer

3. Lower spacer

31. Profile

A31. Longitudinal axis (Profile)

P31. Longitudinal plane of symmetry

ITS. First tubular section

ST2. Semi-tubular section

EX31. Longitudinal end

32. Parallel grooves

33. Semi-circular wall

34. Parallel housing

35. Parallel grooves of the grip groove

36. Hanging throat

4. Roulette system

41. Roulette

42. Screed

43. Mounting plate

44. Side edges

5. Upper spacer

51. Roll-down blind

52. Roof

6. Fixing bracket

Fl, F2. Sliding face

61. First branch

62. Second branch

A. Longitudinal axis of the second branch 62,

B. Axis perpendicular to axis A

62f. Fixed part

62m. Movable part

63. Clamping means

64. Threaded rod

65. Clamping head

66. Tapping

7. Quick locking means

71. Stop stick

72. First stop wall

73. Second stop wall

74. Actuating tab

75. Fixing part

Claims (11)

1. Trolley on casters (1) comprising: - at least two vertical ladders (2), each ladder (2) comprising two vertical uprights (21), in particular in the form of hollow sections, assembled by 5 horizontal crosspieces (22), - at least two lower spacers (3), arranged in the lower part of the vertical scales (2) and connecting said at least two vertical scales (2), - at least two upper spacers (5), arranged in the upper part of the vertical scales (2) and connecting said at least two vertical scales (2), 10 - a plurality of rollers (41), fixed at the level of the lower spacers, in which at least one of said lower spacers (3) and / or upper (5) is connected to the vertical ladders (2) by means of at at least one fixing bracket (6), said fixing bracket (6) comprising a first branch (61) penetrating into a tubular section (STI) of a vertical upright (21), according to a first possibility or 15 a tubular section (STI) formed on an upper (5) or lower (3) spacer, according to a second possibility, and a second branch (62) for fixing by wedge effect, of axis (A), engaging in a tubular section (STI) formed on an upper (5) or lower spacer (3), along the axis (A) of said second branch (62) for fixing by wedge effect, according to the first possibility, or in a tubular section 20 (STI) of the vertical upright (21) according to the second possibility, and in which the second branch (62) for fixing by corner effect of said fixing bracket (6) comprises a fixed part (62f) relative to the first branch (61) and a movable part (62m) relative to the fixed part (62f), when driven by the actuation of a clamping means (63), said fixed part (62f) and said part 25 mobile (62m) being supported one on the other by means of two sliding faces (Fl, F2), inclined with respect to the axis (A), the implementation of the clamping means ( 63) causing the moving part (62m) to move relative to the fixed part (62f), in the direction (DF) of the sliding faces (Fl, F2), configured so that the second branch (62) of said angle (6) is immobilized by wedge effect in the tubular section (STI) during the implementation of the clamping means (63). 2. Trolley on casters (1) according to claim 1, in which the clamping means (63) comprises a threaded rod (64) extending along the axis (A), terminated by a clamping head (65), immobilized in translation relative to the fixed part (62f) of the second branch (62) for fixing by wedge effect, in particular by means of a shoulder (66) formed in the fixed part (62f) of the second branch (62) for fixing by corner effect, the threaded rod (64) cooperating by screwing with a thread (67) formed in the movable part (62m) of the second branch (62) for fixing by corner effect, in order to ensuring the displacement of the mobile part (62m) relative to the fixed part (62f) of the second branch (62) for fixing by wedge effect. 3. Trolley on casters (1) according to claim 1, wherein the lower spacer (3) is a profile (31) comprising the tubular section (STI), said first tubular section (STI), in which is fitted the second branch (62) of the fixing bracket (6) according to the first possibility or the first branch (61) according to the second possibility, said profile (31) defining two parallel grooves (32), located under the first tubular section (STI), designed to slide the side edges (44) of a fixing plate (43) of a caster system (4), comprising said caster (41), the lower spacer (3) being provided fast sliding locking means (7) ensuring the axial stop of the fixing plate (43) in the profile (31). 4. Trolley on wheels according to claim 3 wherein the profile (31) forming the lower spacer (3) comprises the first tubular section (STI) of rectangular shape in which is fitted the second branch (62) of the fixing bracket (6) according to the first possibility or the first branch (61) according to the second possibility, arranged in the center of the profile (31), and a semi-circular wall (33) connecting the two parallel grooves (32), located under the first tubular section (STI), provided for slidingly receiving the lateral edges (44) of a fixing plate (43) of a caster system (4), the first tubular section (STI) being adjacent to the semi-circular wall (33), on its concave surface (SC33). 5. Trolley on wheels according to claim 3 or 4, wherein the quick locking means (7) comprise a stop tab (71), flexible, fixed on said lower spacer (3), said stop tab (71 ) comprising a first stop wall (72) intended to ensure the axial stop of the fixing plate (43) of the caster system (4), 5 in a first direction, along the longitudinal axis (AX31) of the lower spacer (3) coming to bear against an edge of said fixing plate (43), said first stop wall (72) being connected to a protruding actuating tab (74) which, when manipulated, is configured to deform the stop tab (71) in order to retract said first stop wall (72) and allow the release of said fixing plate (43 ) 10 of the two parallel grooves (32). 6. Trolley on casters (1) according to claim 5, in which the rapid locking means (7) comprise a second stop wall (73), integral with said lower spacer (3), provided for ensuring the axial stop. of the fixing plate (43) of the caster system (4), in a second direction, along the longitudinal axis (A31) of the spacer 15 lower (3) coming to bear against an edge of said fixing plate (43). 7. Trolley on casters (1) according to claim 5 or 6, wherein the profile (31) forming the lower spacer (3) comprises a semi-tubular section (ST2), arranged under the first tubular section (STI) forming an attachment groove (34) designed to receive, detachably or not, the stop tab (71) and / or the second wall Stop 20 (73). 8. Trolley on wheels (1) according to claim 4, taken alone or in combination with one of claims 1 to 7, wherein the semi-circular wall (33) and the first tubular section (STI) of the profile (31 ) forming said lower spacer (3) define two parallel housings (34), opening at one end 25 longitudinal (EX31) of the lower spacer (3), the two housings (34) being designed to receive, at the interlocking game, two tabs (81) of a stopper (8), the two tabs (81) of the stopper (8) being connected by a wall (82) in order to define a cavity (83), designed to receive and grip the fixing bracket (6) so as to protect said fixing bracket (6) and the spacer lower (3) shock. 9. Trolley on wheels (1) according to claim 8, wherein the stopper (8) is made of synthetic material, in particular flexible silicone. 10. Trolley on casters (1) according to one of claims 1 to 9, in which at least one of the vertical ladders (2) comprises a stiffening spacer (23), disposed in the upper part and / or in the lower part of said vertical ladder (2), the stiffening spacer (23) being in the form of a profile (23), designed to be fixed at the vertical uprights (21) of said vertical ladder (2) via fixing means (24, 25) of complementary shape to said profile (23). 11. Kit suitable for the manufacture of a trolley on casters (1) according to one of claims 1 to 10 comprising, in the disassembled state: - at least two vertical scales (2), each scale comprising two vertical uprights (21), in the form of hollow sections, assembled by horizontal crosspieces (22), - at least two lower spacers (3), intended to be arranged in the lower part of the vertical ladders (2) and intended to connect said at least two vertical ladders (2), - at least two upper spacers (5), intended to be arranged in the upper part of the vertical ladders (2) and intended to connect said at least two vertical ladders (2), - a plurality of rollers (41), fixed at the level of the lower spacers (3), - At least one fixing bracket (6) intended to connect one of said lower spacers (3) and / or upper to the vertical scales (2), said fixing bracket (6) comprising a first branch (61), pre-assembled, penetrating into a tubular section (STI) of a vertical upright (21), according to a first possibility or a tubular section (STI) formed on an upper (5) or lower spacer (3), according to a second possibility, and a second branch ( 62) fixing by wedge effect, axis (A), intended to come to engage in a tubular section (STI) formed on an upper spacer (5) or lower, along the axis (A) of said second branch (62) for fixing by corner effect, according to the first possibility, or in a tubular section (STI) of the vertical upright according to the second possibility, the second branch (62) for fixing by corner effect of said fixing bracket (6) comprising a fixed part ( 62f) relative to the first branch (61) and a movable part (62m) relative to the fixed part (62f), driven by the actuation of a clamping means (63), said part 5 fixed (62f) and said movable part (62m) being supported one on the other by means of two sliding faces (Fl, F2), inclined relative to the axis (A), the setting using the clamping means (63) causing the moving part (62m) to move relative to the fixed part (62f), in the direction (DF) of the sliding faces (Fl, F2), configured so that the second branch (62) of said bracket (6) is 10 finds immobilized by wedge effect in the tubular section (STI) during the implementation of the clamping means (63).