A sliding attachment for a trolley and a transport assembly including the trolley and at least one such sliding attachment.

Abstract

The sliding attachment (200; 300) includes a base plate (210) for gliding on snow, extending along a first axis (X-X) and extending on opposite sides along a second axis (Z-Z) perpendicular to the first axis, and a clamp (220) detachably attachable to a wheel (130) of a cart. The clamp defines a housing for receiving the lower part of the wheel, the housing opening upwards along the second axis and being fixedly defined by a bottom wall and two side walls, the bottom wall being arranged transversely to the second axis, and the two side walls being arranged parallel to the first and second axes and oriented toward each other along a third axis (Y-Y) perpendicular to the first and second axes. Each side wall is provided with a protrusion projecting toward the other side wall along the third axis. The raised parts are arranged to cooperate by contacting the tire (131) of the wheel so as to reversibly switch the attachment between an operating configuration and a non-operating configuration by means of relative displacement between the attachment and the wheel according to the second axis; in the operating configuration, the raised parts press the tire against the bottom wall according to the second axis so as to wed the lower part of the tire into the lower part of the housing to secure the sliding attachment to the wheel; in the non-operating configuration, the attachment is disengaged from the wheel, and the tire is elastically compressed by the raised parts according to the third axis when the attachment switches between the two configurations.

Description

[0001] This invention relates to a sliding attachment for a trolley. It also relates to a transport assembly comprising a trolley and at least one such sliding attachment.

[0002] This invention relates to the problem of transporting children in strollers on snow. In fact, during the winter weeks, stroller users and winter sports enthusiasts living at certain latitudes must solve the problem of transporting children in strollers on snow. In a sense, pushing a stroller on snow is very difficult and dangerous because the wheels, especially the front wheels, can get stuck in the snow. Furthermore, another difficulty faced by stroller users is that snow often alternates with hard (in other words, snowless, "undulating") ground (such as under covered buildings or the sheltered ground inside enclosed buildings (such as shopping malls).

[0003] Therefore, the present invention relates more specifically to a cart attachment configured to slide on snow or more generally on ground with characteristics similar to snow. Currently, two less-than-satisfactory solutions are available on the market.

[0004] The first type is a multi-purpose attachment, designed in a sense for various existing stroller models. This attachment includes an extended baseboard forming a ski, on the upper surface of which is a shoe designed to be detachably attached to the stroller wheels. This shoe includes, for example, claws, straps, hooks, rings, etc.—in other words, more generally, movable mechanical components that must be manipulated by the user, typically with the aid of tools, to securely attach to the stroller wheels. JP2020026260 provides an example. In practice, operating these movable mechanical components is time-consuming and cumbersome, requiring repetitive operation for at least each front wheel of the stroller, and is often quite uncomfortable for the user, especially since this installation usually must be done outdoors and in cold weather. Of course, when removing the sliding attachment from each of the previously equipped wheels, the user faces the same complexity in removing all the mechanical components of the sliding attachment, and it subsequently proved cumbersome to store and transport these mechanical components so that the stroller could continue to travel on hard surfaces.

[0005] A second, more radical solution involves using a stroller with its front wheels designed to be completely detached from the rest of the stroller and replaced by an equal number of sliding devices, each consisting of a skid with a directional pivot mechanism. These sliding devices are expensive, and storing and transporting them when not in use, while the stroller still has its front wheels, is cumbersome and inconvenient. Furthermore, installing the sliding devices in place of the front wheels is particularly cumbersome because, during this replacement, even when the stroller is typically carrying a child, the user must keep the front of the stroller elevated off the ground.

[0006] GB 2195106 proposes an alternative method, disclosing a sliding attachment for a trolley. This sliding attachment is designed to be mounted on the front and rear wheels located on the same side of the trolley. The sliding attachment includes a channel-shaped body formed as a hook at the front and fitted with a clamp at the rear, the jaws of which form a cavity with a circular cross-section. To hold the sliding attachment to the front and rear wheels, the front wheel is first received within the hook, and then the edge of the rear wheel is pressed between the jaws of the clamp until the rear wheel is received within the cavity. The jaws then confine the edge of the rear wheel within the cavity, thereby allowing vertical and horizontal lateral movement between them.

[0007] JP H0681867U proposes a basic sliding attachment for shopping baskets, designed to clamp the sides of the wheels only along two horizontal contact lines. The wheel holding force is coarse, casting doubt on the feasibility of using this attachment on a stroller.

[0008] The purpose of this invention is to provide a novel sliding attachment for trolleys that is simple, effective and practical in use.

[0009] Therefore, the object of the present invention is to provide a sliding attachment for a trolley. The sliding attachment includes:

[0010] A base plate having an elongated shape along a first axis and presenting a first side and a second side opposite to each other according to a second axis perpendicular to the first axis, the base plate having a snow-sliding surface on the first side of the base plate intended for contacting snow.

[0011] A clamp, supported by the base plate, is disposed on the second side of the base plate and can be detachably attached to the wheels of the trolley.

[0012] The clamp defines a housing for receiving the lower part of the wheel, the housing being open in a direction opposite to the first side of the base plate according to the second axis, and the housing being fixedly defined by a bottom wall and two side walls, the bottom wall being arranged transversely to the second axis, and the two side walls being arranged substantially parallel to the first and second axes and oriented toward each other according to a third axis perpendicular to the first and second axes.

[0013] Each of the two sidewalls is provided with a protrusion that protrudes from the remainder of the respective sidewall toward the other sidewall according to the third axis.

[0014] The aforementioned protrusions are jointly arranged to cooperate through contact with the tire of the wheel, so that the sliding attachment can reversibly change between the following two states by means of relative displacement between the sliding attachment and the wheel according to the second axis:

[0015] Operating configuration, wherein the raised portion presses the tire against the bottom wall according to the second axis, so as to wed the lower portion of the tire into the lower portion of the housing, thereby attaching the sliding attachment to the wheel, and

[0016] In a non-operational configuration, wherein the sliding attachment is detached from the wheel, and during the transition of the sliding attachment between the operational and non-operational configurations, the tire is elastically compressed by the protrusion according to the third axle.

[0017] One of the underlying concepts of this invention is the ability to instantly and reversibly attach and detach a sliding attachment conforming to the invention from a cart wheel, particularly without the use of tools or the addition or need to move mechanical parts, while ensuring the reliability and safety of the sliding attachment to the wheel. To achieve this, the invention utilizes the elastic compressibility of the tire (also called the tread) on the wheel, which can be solid, particularly foamed, or equipped with a pressurized inner tube. In all cases, the tire forms the outer cover of the wheel and is supported by the wheel rim, thereby forming two annular bead rings that slightly protrude beyond the rim on the respective sides of the wheel. According to the invention, the sliding attachment permanently defines a housing, which opens upwards, assuming the base plate of the sliding attachment is placed on a horizontal surface, to allow engagement / disengagement from the wheel after vertical movement. Considering the longitudinal direction of the base plate, the housing is closed towards the bottom from the bottom wall and laterally closed by two side walls facing each other to the left and right, respectively. On the side facing the other wall, each wall is joined by protruding ridges, which are specifically designed, by their shape and size, to interfere with the wheel's tire, and in particular the tire bead, when the wheel is engaged / disengaged perpendicularly to the housing. Thus, more precisely, when the user wishes to attach the sliding attachment to the wheel, which engages perpendicularly downward toward the bottom wall of the housing, especially after the wheel of the cart has been slightly raised and the sliding attachment is placed perpendicularly on the ground beneath the wheel, the tire, and in particular the tire bead, successively contacts the ridges and is then elastically compressed to push these ridges downward. Once past the ridges, the pressure is at least partially released, and the wheel is then held downward against the bottom wall of the housing via the ridges. The sliding attachment is then in its operational configuration, attached to the wheel, and ready to ensure that the wheel and the cart glide effectively and safely on snow, including during turns, as long as the front wheel or each of the front wheels of the cart is equipped with the sliding attachment, allowing it to pivot relative to the cart frame. When the user then wishes to disengage the sliding attachment from the wheel to switch the wheel to a non-operating configuration, the user releases the wheel vertically upward from the housing, specifically by keeping the attachment pressed against the ground with their feet on the base plate, while slightly lifting the wheel area of ​​the cart. This causes the tire, and particularly the tire bead, to be elastically compressed in succession by the raised sections to pass over them in an upward direction. Once past the raised sections, the wheel is released. The cart wheel is then released from the sliding attachment and ready to roll on a hard, snow-free surface. In practice, the aforementioned raised sections can take various forms and can be advantageously combined with optional features that improve or enhance their effect, as detailed below. In any case, manipulating the sliding attachment and the cart to switch the sliding attachment between its non-operating and operating configurations is particularly easy, convenient, and immediate, taking only a few seconds, without the use of tools, and without requiring any movable mechanical parts within the sliding attachment.Furthermore, the sliding attachment according to the invention never alters the effectiveness of the trolley's suspension system because it does not restrict wheelbase variation. Other advantages and advantageous optional features of the sliding attachment, particularly concerning its strength, manufacture, and safety, will be demonstrated in the remainder of this document.

[0018] Further advantageous features of the sliding attachment according to the invention.

[0019] The protrusions on each sidewall are inclined so that when the sliding attachment transitions from one of the operating configuration and the non-operating configuration to the other configuration, it gradually compresses the tire of the wheel toward the other sidewall.

[0020] In a cross-section relative to the third axis, each protrusion presents a "V" shaped profile or a "V" shaped profile truncated at the tip of the "V".

[0021] In the protrusions on the corresponding sidewalls according to the third axis, each protrusion presents an arched shape, which bulges towards the bottom wall in a dome shape.

[0022] When the sliding attachment is in the operating configuration, each protrusion presents a profile that matches the curvature of the tire on the side facing the bottom wall.

[0023] Each protrusion is composed of multiple elements separated from each other along the first axis.

[0024] The housing is further fixedly defined by a front wall and a rear wall, the front wall and the rear wall being arranged toward each other according to the first axis and connecting each of the two side walls to each other.

[0025] When the sliding attachment is in the operating configuration, it cooperates by contacting the tire at the lower part of the wheel, and the front wall and the rear wall are able to form a corresponding abutment for the lower part of the wheel according to the first axle.

[0026] The base plate and the sleeve are integrally formed together, particularly by molding.

[0027] To facilitate demolding of the sliding attachment, the base plate is provided with a through-hole that connects the first side and the second side of the base plate to each other, and the through-hole is arranged in a straight line along the second axis on the raised portion.

[0028] The bottom wall is formed by a portion of a tube centered on a geometric axis parallel to the third axis, with its concave surface facing the first side away from the bottom plate.

[0029] The bottom wall is substantially flat and is formed by the bottom plate.

[0030] Another object of the present invention is to provide a transport component. The transport component includes:

[0031] A trolley comprising at least one front wheel and two rear wheels, each front wheel having a tire that is elastically deformable by compression, and

[0032] A sliding attachment for each of the front wheels, the sliding attachment being a sliding attachment as defined above, and in the operating configuration, the sliding attachment being attached to the corresponding front wheel.

[0033] Further advantageous features of the transport component according to the invention.

[0034] The tire of each of the front wheels is supported by the rim of the front wheel and protrudes from the rim on each side of the front wheel to form two bead rings.

[0035] When the tires are stationary, the width of the tire of each of the front wheels at the level of the bead is less than or equal to the spacing between the sidewalls outside the protrusions according to the third axis, and greater than the spacing between the protrusions according to the third axis.

[0036] Along the third axis, the spacing between the protrusions is equal to or greater than the width of the rim of each of the front wheels.

[0037] Each of the front wheels is mounted on the front portion of the trolley's frame and connected to the front portion of the frame so as to pivot freely about a pivot axis that extends radially or orthogonally to the axis of rotation of the front wheel.

[0038] When the front wheels or each front wheel and the associated sliding attachments are attached to each other in the operating configuration, the trolley is still able to operate in turn by pivoting the front wheels relative to the frame.

[0039] The housing is further fixedly defined by a front wall and a rear wall, which are arranged toward each other according to the first axis and connect each of the two side walls to one another.

[0040] When the sliding attachment is in the operating configuration, it cooperates by contacting the tire at the lower part of the wheel, and the front wall and the rear wall are able to form corresponding abutments for the lower part of the wheel according to the first axle.

[0041] The front wall and the rear wall are spaced apart from each other along the first axis at the opening of the housing, and the distance between the front wall and the rear wall is less than the outer diameter of the tire.

[0042] The invention will be better understood by reading the following description, which is given by way of example only and with reference to the accompanying drawings, wherein:

[0043] [ Figure 1 ] Figure 1 This is a perspective view of the transport component according to the present invention;

[0044] [ Figure 2 ] Figure 2 It belongs to Figure 1 A perspective view of the front part of the trolley of the transport component and two sliding attachments, one of which is shown in an operational configuration and the other in a non-operational configuration;

[0045] [ Figure 3 ] Figure 3 It is based on Figure 2 A partial cross-sectional view of plane III;

[0046] [ Figure 4 ] Figure 4 It is based on Figure 3 A cross-sectional view of line IV-IV;

[0047] [ Figure 5 ] Figure 5 It is shown separately. Figure 2 A perspective view of one of the sliding attachments in the image;

[0048] [ Figure 6 ] Figure 6 It is based on Figure 5 A cross-sectional view of plane VI;

[0049] [ Figure 7 ][ Figure 8 ][ Figure 9 ][ Figure 10 ] Figures 7 to 10 They are respectively similar to Figure 5 , Figure 6 , Figure 3 and Figure 4 The view shows other embodiments of the sliding attachment according to the invention; and

[0050] [ Figure 11 ] Figure 11 yes Figures 7 to 10 The perspective view of the sliding attachments of the illustrated embodiment, which are arranged head-to-tail with each other.

[0051] Figures 1 to 4 A transport assembly 1, comprising a stroller 100 and two sliding attachments 200 and 300, is shown, as explained in more detail below, which enables the transport of a child in the stroller 100 on snow by sliding at least the front of the stroller 100 on the snow. Figure 1In the middle, sliding attachments 200 and 300 are attached to the trolley 100, while... Figure 2 In this configuration, only the sliding attachment 200 is attached to the trolley, while the sliding attachment 300 is detached from the trolley. Figure 5 and Figure 6 The sliding attachment 200 is shown separately in the image.

[0052] Before describing in detail the sliding attachments 200 and 300 and how the sliding attachments 200 and 300 can be attached to and separated from the trolley 100, the trolley 100 will be described in more detail, noting that the trolley can generally fall within a known range.

[0053] The trolley 100 includes a frame 110. This frame 110 defines a front-to-back direction; in a sense, two portions of the frame 110, opposite each other along this front-to-back direction, correspond to the front portion of the frame facing forward when the trolley 100 is pushed forward and the rear portion of the frame facing backward when the trolley 100 is pushed forward. In the example shown in the accompanying drawings, the frame 110 has a tubular structure, primarily produced by assembling tubes.

[0054] Regardless of its form, the frame 110 is designed to support the receiving member 120 in use, which allows for the reception of a child to be transported by the stroller 100, positioned in a sitting, lying, or intermediate position on the receiving member 120. Therefore, the receiving member 120 can be selected from seats, portable cribs, cradles, etc., and the form in which the receiving member 120 is made is not limited to the present invention. Furthermore, in a manner known per se and not described in detail, the frame 110 is advantageously designed to allow the receiving member 120 to be interchangeable, particularly according to the age of the child to be transported.

[0055] The cart 100 also includes wheels that, when in use, allow the cart to remain stationary and roll on the ground when the ground is sufficiently hard. These wheels are arranged in the lower region of the frame 110 to support the frame relative to the ground. Figure 1 and 2 As shown, these wheels include one or more front wheels 130 and rear wheels 140. In the example shown in the figures, two front wheels 130, namely the left front wheel and the right front wheel, are provided on the left and right sides of the frame 110, respectively, and two rear wheels 140, namely the left rear wheel and the right rear wheel, are provided on the left and right sides of the frame 110, respectively.

[0056] like Figure 3 and Figure 4As shown, each of the front wheels 130 defines a rotation axis R130, about which the front wheel rotates to roll on the ground when the ground is sufficiently hard. In operation, the respective rotation axis R130 of the front wheel 130 extends substantially parallel to the ground. Each of the front wheels 130 is mounted on the front portion of the frame 110, advantageously connected to this front portion of the frame, so as to pivot freely about a pivot axis that extends radially or orthogonally to the rotation axis R130 of the front wheel, such that the front portion of the frame can pivot about the pivot axis independently of rolling about the rotation axis, and thus change the orientation of the wheel relative to the frame 110, thereby changing the forward direction of the frame 110 relative to the ground. Thus, each of the front wheels 130 can be described as a "pivoting wheel," sometimes called a "freewheel." In fact, the details of mounting the front wheels 130 to the frame 110 do not limit the invention.

[0057] In all cases, each of the front wheels 130 includes a tire 131, also referred to as a "tread," which forms the outer perimeter of the front wheel, centered on the axis of rotation R130, and is in direct contact with the ground when the front wheel 130 rolls on a hard surface. Figures 2 to 4 As shown, the tire 131 on each front wheel 130 is supported by a wheel rim 132. This rim 132 is centered on a rotation axis R130, and in the example shown here, the rim is attached to the front wheel hub 133 centered on the rotation axis R130. Furthermore, in the example shown here, each of the front wheels 130 has two hubcaps 134 that cover the intermediate region between the front wheel rim 132 and the hub 133 on each side of the front wheel. In fact, the specific features of each of the front wheels 130 relating to the rim 132 and the connection between the rim and the rest of the front wheel do not limit the invention.

[0058] In all cases, each front wheel 130 is provided with a tire 131, which, on the one hand, exhibits the ability to elastically deform upon compression, and on the other hand, extends slightly beyond the rim 132 on each side of the front wheel, thereby forming two bead 135. For example... Figure 3 and Figure 4 As clearly shown, each bead 135 of the tire 131 of each front wheel 130 is not flush with the corresponding rim 132, but rather protrudes from the rim toward the outside of the wheel. Each bead 135 extends continuously around the entire periphery of the corresponding front wheel 130, and thus presents a generally annular shape centered on the rotational axis R130 of the front wheel. In fact, the shape and elastic deformation capability of the bead 135 of each tire 131 are determined by the tire structure.

[0059] In the embodiment shown in the accompanying drawings, the tire 131 of each front wheel 130 advantageously presents a solid structure. Unlike an inflatable structure, the solid structure is unaffected by variable air pressure, ensuring that the profile of the tire 131 does not undergo significant deformation under normal use conditions of the trolley 100. The solid structure of the tire 131 may optionally be made of polyurethane foam, which is formed, for example, by cold expansion in a closed mold. The advantage of this polyurethane foam is that it exhibits a constant Shore hardness and high abrasion resistance throughout the tire 131, ensuring that the tire 131 maintains its dimensions over time and retains its resilience at low temperatures. Of course, as an alternative, the material constituting the solid structure, particularly the foamed structure, of the tire 131 is not limited to polyurethane foam, as other materials are conceivable, especially when they exhibit properties similar to those of polyurethane foam.

[0060] Each of the rear wheels 140 defines an axis of rotation about which the corresponding wheel rotates to roll on a sufficiently hard surface, and this axis of rotation extends substantially parallel to the ground in use. Each of the rear wheels 140 is mounted on the rear portion of the frame 110 and is advantageously fixedly connected to the rear portion of the frame, in other words, non-pivotibly connected to the rear portion of the frame compared to the front wheels 130. In the example embodiment shown in the figures, the respective axes of rotation of each rear wheel 140 are aligned such that the rear wheels 140 form a fixed rear wheel assembly centered on the same axis of rotation. Particularly for structural strength reasons, this rear wheel assembly advantageously includes an axle 141, which... Figure 1 It is shown in the middle with a dashed line and extends coaxially from each of the rear wheels between the rear wheels 140.

[0061] The cart also includes a pushing member 150, which is integrally supported by the rear portion of the frame 110 in the upper region of the rear portion. The pushing member 150 allows the user to apply manual force to the frame 110 by rolling the frame on a sufficiently hard surface using the wheels 130 and 140, particularly by pushing the frame 110 forward. The pushing member 150 is implemented, for example, in the form of a lever, handle, etc. The design of the pushing member 150 does not limit the invention.

[0062] The two sliding attachments 200 and 300 will now be examined more closely. In the exemplary embodiment shown in the figures, the two sliding attachments are identical to each other, such that only sliding attachment 200 will be described in detail below; it should be understood that sliding attachment 300 is described using the same terminology.

[0063] As shown in the figure, the sliding attachment 200 is oriented relative to an orthogonal reference system defined by geometric axes XX, YY, and ZZ. In practice, when the sliding attachment 200 is used to allow the cart 100 to slide at least partially on level snow, axes XX and YY, which are perpendicular to each other, are horizontal, while axis ZZ, which is perpendicular to axes XX and YY, is vertical.

[0064] like Figure 5 and Figure 6 As shown, the sliding attachment 200 includes a base plate 210 with an elongated shape along the XX axis. In other words, the base plate 210 extends longitudinally along the XX axis. The base plate 210 presents sides that are opposite to each other along the ZZ axis, namely a lower side intended to face the ground and an upper side intended to face upward (in other words, away from the ground).

[0065] Functionally, the base plate 210 is similar to a ski. In this respect, the base plate 210 has a snow-sliding surface 210A on its underside designed for contact with snow. Furthermore, the base plate 210 may have various features to make it easier to glide on snow, but this does not limit the invention. For example, in the embodiment shown in the figures, the sliding surface 210A advantageously has grooves to facilitate the removal of water film formed beneath the base plate 210 during snow gliding. Here, the sliding surface 210A is therefore provided with two grooves 211, which extend substantially along the axis X along the entire axial range of the base plate 210. Additionally, the base plate 210 forms a scraper at its longitudinal front end 212, which is slightly wider along the YY axis and gradually rises upwards to its free front end compared to the rest of the base plate 210. Similarly, the base plate 210 includes a longitudinal rear end 213 that forms a heel that gradually rises upwards to its free rear end, the rise of which is less than the rise of the scraper.

[0066] The sliding attachment 200 also includes a clamp 220 adapted for detachable attachment to a cart wheel. Therefore, the clamp 220 can be attached to only one cart wheel without interfering with any of the other cart wheels. In the embodiment shown in the figures, the clamp 220 is thus adapted to be attached to any of the front wheels 130, as explained in more detail below. Figure 1 In this configuration, the sleeve 220 allows the sliding attachment 200 to be detachably attached to the left front wheel 130, while the sliding attachment 300 can be detachably attached to the right front wheel 130.

[0067] The base plate 210 supports the clamp 220 and is arranged on the upper side of the base plate 210. In the embodiment considered here, the clamp 220 rises from the surface 210B, the base plate of the clamp is disposed on the upper side of the surface 210B, and the base plate of the clamp is substantially parallel to the sliding surface 210A. Furthermore, the clamp 220 is advantageously located in the middle longitudinal portion 214 of the base plate 210, i.e., between the front longitudinal portion 212 and the rear longitudinal portion 213.

[0068] The clamp 220 defines a housing 221 designed to receive the lower part of the wheel 130. To allow the lower part of the wheel 130 to be inserted into and reversibly removed from the housing 221, the housing 221 is open upwards, in other words, according to the axle ZZ and in a direction opposite to the underside of the base plate 210. In this way, the sliding attachment 200 and the wheel 130 can move relative to each other according to the axle ZZ, so that the sliding attachment 200 can reversibly transform between the following:

[0069] - Operational configuration, wherein the sliding attachment 200 is attached to the wheel 130, the lower part of which engages downwards in the housing 221, and

[0070] - Non-operational configuration, in which the sliding attachment 200 is detached from the wheel 130, and compared with the operational configuration, the lower part of the wheel detached from the housing 221 is further away from the base plate 210 along the ZZ axis.

[0071] exist Figures 1 to 4 The operation configuration of the sliding attachment 200 is shown in the figure. Figure 2 The non-operational configuration of the sliding attachment 300 is shown.

[0072] In the exemplary embodiment shown in the accompanying drawings, the housing 221 advantageously presents a plane of symmetry P, which is parallel to axes X and ZZ and substantially located in the middle of the base plate 210 along axis YY. This plane of symmetry P corresponds to... Figure 5 Section VI is shown.

[0073] Along axis ZZ, housing 221 is closed at its bottom (in other words, in the direction of base plate 210) by bottom wall 222 of sleeve 220, which is arranged transversely to axis ZZ. In other words, bottom wall 222 extends through axis ZZ. Bottom wall 222 is configured as follows:

[0074] - When the sliding attachment 200 is in its operating configuration, the bottom of the tire 131 of the wheel 130 is in close contact with the bottom wall 222 along the axle ZZ, and

[0075] - When the sliding attachment 200 is in the non-operating configuration, the tire 131 of the wheel 130 is away from the bottom wall 222.

[0076] In the embodiment considered in the accompanying drawings, the bottom wall 222 is formed by a portion of a tube centered on a geometric axis Y222 parallel to axis YY, and its concave surface is turned upwards, in other words, in a direction opposite to the underside of the base plate 210. The concave surface of this tube portion has a radius slightly larger than the diameter of the wheel 130, and is provided with at least one protrusion 222.1 that locally reduces the distance between the concave surface and the geometric axis Y222. When the sliding attachment 200 is in the operating configuration, the radial clearance is maintained between the concave surface of the aforementioned portion of the tube and the tire 131 of the wheel 130, except at the level of the protrusion 222.1 or each protrusion 222.1 that is close to the tire along axis ZZ. Figure 4 Clearly visible in the center. Therefore, the bottom wall 222 is designed to fit snugly around the lower part of the wheel 130, making the engagement of the clamp 220 with the wheel 130 particularly intuitive for the user, and helping to remove any snow that may have clogged the housing 221 before securing the clamp 220 to the wheel 130.

[0077] Furthermore, in the embodiment considered in the accompanying drawings, the geometric plane defined by the sliding surface 210A of the base plate 210 is tangent to the convex surface of the portion of the tube forming the bottom wall 222, as shown in the figures. Figure 3 and Figure 4 This is clearly visible. During use, the bottom wall 222 therefore rests partially against the snow on the application sliding surface 210A. This enhances the compactness and strength of the clamp 220.

[0078] Along axis YY, housing 221 is enclosed by two side walls 223 of sleeve 220, namely the left side wall and the right side wall. The two side walls 223 are arranged parallel to axes X and ZZ, facing each other according to axis YY, and are connected to each other along axis YY via bottom wall 222. When sliding attachment 200 is in the operating configuration, the lower part of wheel 130 is inserted between the side walls 223 along axis YY, as in... Figures 1 to 3 It is clearly visible in the middle.

[0079] In the embodiment considered in the accompanying drawings, each of the sidewalls 223 extends along axis ZZ to the base plate 210. Each sidewall 223 thus protrudes from face 210B of the base plate 210.

[0080] Each of the two sidewalls 223 is provided with a protrusion 224 that extends in a projecting manner from the remainder of the respective sidewall toward the other sidewall along axis YY. When the sliding attachment 200 is in an operating configuration and when the sliding attachment switches between the operating and non-operating configurations, the two protrusions 224 of the sliding attachment 200 can cooperate by contacting the tire 131 of the wheel 130. This cooperation through the contact between the protrusions 224 and the tire 131 is caused by dimensional interference between the protrusions 224 and the tire 131 (particularly the tire bead 135).

[0081] Therefore, when the sliding attachment 200 is in the operating configuration, the protrusion 224 is in close contact with the tire 131, or more precisely, the lower part of the tire, according to the axle ZZ, abutting against the bottom wall 222 of the housing 221, thereby fixing the sliding attachment to the wheel 130, as shown. Figure 3 and Figure 4 This is clearly visible. In fact, due to the aforementioned dimensional interference between the protrusions 224 and the bead 135, the protrusions 224 are thus attached to the bead 135 of the tire 131, more precisely, to the corresponding lower portions of these bead 135s. Specifically, when the tire 135 is stationary (in other words, not subjected to compressive stress), the width of the tire 131 at the level of the bead 135 is intended, on the one hand, to be less than or equal to the spacing along the axis YY between the sidewalls 223 outside the protrusions 224, and on the other hand, to be greater than the spacing along the axis YY between the protrusions 224.

[0082] When the sliding attachment switches between operating and non-operating configurations, the tire 131 (more precisely, the lower part of the tire) is elastically compressed by the protrusion 224. Due to the aforementioned dimensional interference between the protrusion 224 and the bead 135, this compression of the tire 131 by the protrusion 224 occurs essentially at the level of the bead 135 of the tire 131. Meanwhile, the rim 132 essentially does not restrict the protrusion 224; in a sense, the spacing between the protrusions 224 along the axis YY is equal to or greater than the width of the rim 132.

[0083] In an optional arrangement that facilitates the transition of the sliding attachment 200 between its operating and non-operating configurations, the protrusions 224 of each sidewall 223 are angled so that, as the sliding attachment 200 transitions from one of its operating and non-operating configurations to the other, the tire 131, and particularly the bead 135 of the tire 131, is gradually compressed toward the other sidewall. Figure 3 , Figure 5 and Figure 6 As clearly shown, each protrusion 224 thus presents, on the one hand, an upper surface 224A extending downwardly at an angle from the corresponding sidewall 223, and on the other hand, a lower surface 224B extending upwardly at an angle from the corresponding sidewall 223. Therefore, in a transverse section relative to the axis YY, as... Figure 3 As shown, each protrusion 224 presents a "V" shaped profile, and is truncated at the tip of the "V" if necessary.

[0084] Another advantageous alternative arrangement implemented in the example of the implementation scheme considered here is that each protrusion 224 on the corresponding sidewall 223 according to the axis YY presents an arched shape, such as... Figure 6 As clearly visible, the arched shape curves downwards, in other words, towards the bottom wall 222 of the housing 221. This arched shape improves the contact cooperation between the protrusion 224 and the tire 131 of the wheel 130. In particular, as... Figure 6 Clearly visible, each protrusion 224 exhibits a lower profile, particularly at its lower surface 224B, where the lower profile is arc-shaped with a radius substantially equal to the radius of the tire 131, and especially the radius of the tire's bead 135. In this way, when the sliding attachment 200 is in the operating configuration, this lower profile of each protrusion 224 closely approximates the curvature of the tire 131 of the wheel 130, and particularly the curvature of the bead 135. The protrusion 224 also exhibits an upper profile, particularly at its upper surface 224A, which is also arched, but with a curvature less than that of the upper profile. As the sliding attachment 200 transitions from the non-operating configuration to the operating configuration, this upper profile of the protrusion 224 facilitates engagement of the lower portion of the wheel 130 within the housing 221 by guiding the wheel 130 to gradually center relative to the lower profile of the protrusion 224.

[0085] Along axis XX, in the example of the embodiment considered in the accompanying drawings, each protrusion 224 extends discontinuously, but is composed of several individual elements 224.1, 224.2, and 224.3, as shown below. Figure 5 and Figure 6 As shown, these components are separated from each other along axis XX. This segmented embodiment of the protrusion 224 presents practical advantages for manufacturing the sleeve 220. This segmented embodiment also allows the protrusion 224 and the tire 131 of the wheel 130 to interact over a larger area along axis XX, while this cooperation is discontinuous along the outer periphery of the tire 131. Because the tire 131 is not significantly subjected to stress from the protrusion 224 in the free space between components 224.1, 224.2, and 224.3, localized overstress is avoided.

[0086] Along axis XX, housing 221 is advantageously closed by a front wall 225 and a rear wall 226, which face each other along axis XX. Figure 5As shown, each of these front walls 225 and rear walls 226 connects the side walls 223 to each other, thereby strengthening the structural strength of the sleeve 220 and its housing 221. When the sliding attachment 200 is in the operating configuration, the front wall 225 forms a stop for the lower part of the wheel 130 according to the axle XX, as... Figure 4 Clearly visible in the image. Similarly, the rear wall 226 forms a stop for the lower part of the wheel 130 according to the axle XX facing rearward. Therefore, when the sliding attachment 200 is in its operating configuration, the front wall 225 and the rear wall 226 reinforce the attachment of the wheel 130 to the bushing 220. The stops formed by the front wall 225 and the rear wall 226 respectively cooperate by contacting the lower part of the wheel 130 (more precisely, the tire 131 at that lower part) due to their dimensional interference. In this respect, as Figure 4 Clearly visible, the front wall 225 and the rear wall 226 are spaced apart along axis XX at the opening of the housing 221, and the distance between the front wall 225 and the rear wall 226 at the opening of the housing 221 is less than the outer diameter of the tire 131.

[0087] In the embodiment shown in the figures, each of the front wall 225 and the rear wall 226 extends along axis ZZ to the base plate 210. Therefore, the front wall 225 and the rear wall 226 each protrude from surface 210B of the base plate 210. Furthermore, in the example embodiment shown in the figures, the front wall 225 and the rear wall 226 rise at an angle relative to axis ZZ. Moreover, the angle of inclination of the rear wall 226 relative to axis ZZ is more significant than that of the front wall 225, specifically at least 30°, such that the rear wall 226 presents surface 226A on its upwardly folded side (in other words, in the direction opposite to the lower side of the base plate 210), which extends substantially along axis XX and is provided with one or more protrusions 227 distributed according to axis XX. The importance of the protrusions 227 will be explained later.

[0088] In any case, housing 221 allows sliding attachment 200 to be easily, effectively, conveniently and instantly attached to and removed from wheel 130.

[0089] In practice, for example, considering that stroller 100 is initially used to roll on a hard surface with its front wheels 130 and rear wheels 140, and then stroller 100 reaches snow, where it becomes difficult to move forward due to the wheels getting stuck in the snow, the user of stroller 100 can instantly return them to stroller 100 by attaching sliding attachments 200 and 300 to the front wheels 130 respectively. To do this, the user lifts the front portion of frame 110 to raise the front wheels 130 a few centimeters off the ground. This operation of lifting the front portion of stroller 100 can be easily performed by keeping the rear portion of stroller 100 on the ground at the level of its rear wheels 140, and if necessary, while the child is still in the stroller's receiving member 120. The user then places sliding attachment 200 under the left front wheel 130, positioning the left front wheel perpendicularly to the housing 221 in a straight line. The user can then stop lifting the front portion of the frame 110 by keeping the left front wheel 130 stationary in the upper portion of the housing 221, particularly against the corresponding upper surface 224A of the protrusion 224. The user then applies a forceful push towards the front portion of the base plate 210 in the direction of the ground (in other words, downwards along the ZZ axis), causing the lower portion of the tire 131 of the left front wheel 130, particularly in the area of ​​its bead 135, to be elastically compressed by the protrusions 224 along the YY axis until it passes downwards through these protrusions 224. Once the protrusions 224 have been cleared by the tire 131, the tire, particularly its bead 135, is at least partially depressurized by elastic action, while simultaneously adhering to the bottom wall 222 along the ZZ axis via the protrusions 224. Simultaneously, the tire 131 abuts the front wall 225 and the rear wall 226 along the XZ axis. The lower portion of the tire 131 is thus firmly wedged into the lower portion of the housing 221, ensuring that the sliding attachment 200 is attached to the wheel 130. The user performs the same operation using the sliding attachment 300 to attach the sliding attachment to the right front wheel 130. Figure 2 The illustration also shows the sliding attachment 200 attached to the trolley 100, while the user lifts the front part of the frame 110 and positions the sliding attachment 300 and the right front wheel 130 in a straight line to secure it to the sliding attachment 300.

[0090] Once the two sliding attachments 200 and 300 are attached to the trolley 100, as Figure 1 As shown, the user can move the cart 100 forward on the snow by sliding attachments 200 and 300 on the snow in front of the cart. Note that the cart 100 remains maneuverable when turning due to the ability of the front wheel 130 to pivot relative to the frame 110.

[0091] Now consider a user who wishes to detach the sliding attachments 200 and 300 from the cart 100. For example, the user has reached a snow-free area and positions themselves to the side of the cart 100 with the front of their feet resting at least on the surface 210B of the base plate 210, on either side of the clamps 220 of the sliding attachment 200, to securely hold the base plate to the ground. The slope and protrusion 227 of the rear wall 226 advantageously reinforce this holding by allowing one of the user's feet to rest partially on the surface 226A of the rear wall 226 and to be held securely relative to the rear wall 226 by friction / clicking the protrusion 227. The user then pulls the front portion of the frame 110 vertically toward themselves, in other words, upward according to the axle ZZ. This correspondingly pulls the left front wheel 130 out of the housing 221 and upward over the protrusion 224 by means of the elastic compression of the tire 131, particularly its bead 135. Thus, the sliding attachment 200 is converted to a non-operational configuration. The user acts in the same manner as the sliding attachment 300 to disengage the sliding attachment from the right front wheel 130.

[0092] It should be noted that the description of attaching / detaching sliding attachments 200 and 300 from the front wheels 130 of the cart applies directly to the rear wheels 140, provided that each rear wheel includes a tire similar to the tire 131 on the front wheels 130. Specifically, it is theoretically possible to equip each of the four wheels of the cart 100 with one of the sliding attachments, provided that all four are available. However, in practice, for safety reasons, the combined use of sliding attachments (e.g., sliding attachments 200 and 300) on all wheels of the cart may be discouraged, even undesirable or prohibited. In fact, there may be significant potential hazards on sloping snow, especially if the user accidentally or clumsily releases the cart. In this regard, according to the advantageous alternative arrangement of sliding attachments 200 and 300, each of the sliding attachments 200 and 300 is provided with a corresponding warning for the user, facing upwards, in other words, in a direction opposite to the underside of the base plate, so that it is visible to the user during use. Therefore, in the example shown in the accompanying drawings, the sliding attachment 200 has a visual warning area 215 on surface 210B of its base plate 210. This visual warning area 215 includes, for example, one or more pictographs and / or text, designed to clearly inform the user that the sliding attachment is only provided for the front wheel 130. The form of the visual warning area 215 is not limiting and includes, for example, stickers, inlaid markings, etc.

[0093] In addition to the functional properties described above for sliding attachments 200 and 300, these sliding attachments are advantageously designed to be simple and economical to manufacture. For this purpose, as in the example shown in the accompanying drawings, the bottom wall 222, the two side walls 223, and the front wall 225 and rear wall 226 are integral with the base plate 210. Specifically, the bottom wall 222, side walls 223, and front wall 225 and rear wall 226 are preferably integrally molded with the base plate 210. In other words, the sleeve 220 and the base plate 210 are optionally integral with each other, particularly by molding. To facilitate demolding, the base plate 210 is advantageously provided with an opening 216, such as... Figure 3 and Figure 5 As clearly visible, the openings connect the lower and upper sides of the bottom 210 to each other. These openings 216 are arranged in a straight line with the raised portion 224 along axis ZZ.

[0094] Figures 7 to 11 Sliding attachments 1200 and 1300 are shown as alternative embodiments of sliding attachments 200 and 300 described so far. Sliding attachments 1200 and 1300 are functionally similar to sliding attachments 200 and 300 because, like sliding attachments 200 and 300, they allow the front of the cart 100 to slide on snow. However, sliding attachments 1200 and 1300 have specific features compared to sliding attachments 200 and 300, which are detailed below.

[0095] In the example shown in the accompanying drawings, the two sliding attachments 1200 and 1300 are identical to each other, such that only sliding attachment 1200 will be described in detail below. It should be understood that sliding attachment 1300 is described using the same terminology.

[0096] The sliding attachment 1200 includes a base plate 1210 that is functionally and even structurally similar to the base plate 210. In particular, the base plate 1210 has a snow sliding surface 1210A on its lower side and a surface 1210B on its upper side.

[0097] The sliding attachment 1200 also includes a sleeve 1220, which is functionally similar to sleeve 220. Specifically, sleeve 1220 defines a housing 1221, which is functionally similar to housing 221, and is defined by a bottom wall 1222, a side wall 1223, a front wall 1125, and a rear wall 1226, which are functionally similar to walls 222, 223, 225, and 226, respectively. Similar to sleeve 220, sleeve 1220 is advantageously integrally molded with the bottom 1210.

[0098] Unlike bottom wall 222, bottom wall 1222 is essentially flat and is formed by bottom plate 1210, or more precisely by a dedicated portion of bottom plate that is aligned along axis ZZ of sleeve 1220. This arrangement is advantageous for the compactness, robustness, and manufacturability (especially molding) of sliding attachment 1200.

[0099] The side wall 1223 is basically the same as the side wall 223, but in particular, it is provided with a protrusion 1224 similar to the protrusion 224.

[0100] Unlike the front wall 225 and the rear wall 226, the front wall 1225 and the rear wall 1226 are not inclined relative to the axis ZZ, but rise parallel to the axis ZZ from the base plate 1210. Therefore, the rear wall 1226 has no protrusions, such as protrusion 227.

[0101] Independent of the structural specifications of the walls 1222, 1223, 1225, and 1226 relating to the clamp 1220, the clamp 1220 presents an optional arrangement that allows the sliding attachment 1200 to be attached to the rear wheel 140 of the trolley 100. Furthermore, this arrangement is compatible with the molding of the sliding attachments 1200 and 1300.

[0102] For this purpose, the sleeve 1220 includes a safety device 1227 that prevents the sliding attachment 1200 from changing from a non-operating configuration to an operating configuration by means of interference along the shaft ZZ and the axle 141 when the user attempts to attach the sliding attachment 1200 to any of the rear wheels 140. In the embodiment shown in the figures, the safety device 1227 includes two webs 1227.1 and 1227.2, which are arranged substantially parallel to the shafts X and ZZ and are located on either side of the sidewall 1223. In fact, the webs 1227.1 and 1227.2 extend from the surface 1210B of the base plate 1210. Each of these webs 1227.1 and 1227.2 presents ends 1227.1A and 1227.2A, particularly by means of their dimensions, designed to fit snugly against the axle 141 according to axis ZZ when a user attempts to attach the sliding attachment 1200 to any of the rear wheels 140. Regardless of the design of the safety device 1227, it prevents any possibility of the sliding attachments 1200 and 1300 being attached to the rear wheels 140, thus eliminating the risk that all wheels 130 and 140 of the trolley 100 are equipped with sliding attachments.

[0103] In a favorable alternative arrangement, utilizing the presence of the webs 1227.1 and 1227.2 of the safety device 1227, the sliding attachments 1200 and 1300 can be arranged end-to-end and held together by interlocking. To achieve this, as Figure 7 and 9As clearly visible, each sidewall 1223 and the webs 1227.1, 1227.2 closest to that sidewall form free spaces 1228.1, 1228.2 between them along the axis YY. Each of these free spaces 1228.1 and 1228.2 is specifically designed by its dimensions to accommodate one of the webs of the sliding attachment 1300 when the sliding attachment 1300 in its non-operating configuration is attached head-to-tail to the sliding attachment 1200, which is also in its non-operating configuration. Then, the sliding attachments 1200 and 1300 are as follows Figure 11 The arrangement is shown. Specifically, each of the free spaces 1228.1 and 1228.2 is provided with a width, in other words, a dimension along the axis YY, i.e., a gap is provided along the axis YY between the corresponding sidewall 1223 and the corresponding webs 1227.1, 1227.2, which is substantially equal to the thickness of the webs 1227.1 and 1227.2 along the axis YY. When the sliding attachments 1200 and 1300 are in... Figure 11 In the head-to-tail configuration, one of the webs 1227.1 and 1227.2 weds into one of the free spaces of the sliding attachment 1300, which tends to stabilize the head-to-tail arrangement. In all cases, when the sliding attachments 1200 and 1300 are connected head-to-tail, they together form a compact assembly whose housing is typically parallelepiped and has a compact design that is particularly easy to operate. For example, the sliding attachments 1200 and 1300, mounted head-to-tail in this manner, are easily manipulated together to be placed into and then retrieved from the rear basket of the trolley 100.

[0104] Finally, various arrangements and variations of the trolley 100 and sliding attachments 200, 300, 1200, and 1300 described so far can be envisioned. For example:

[0105] - The stroller may not have two front wheels, but may have only one front wheel; similarly, the stroller 100 may have more than two front wheels and more than two rear wheels;

[0106] - Tire 131 is not a solid structure and can be inflatable, i.e., it includes a pressurized air chamber;

[0107] - Hoop 220 or 1220 is not integrally formed with base plate 210 or 1210, but can be carried by base plate as a separate component, attached and securely fixed to base plate; and / or

[0108] - For the sliding attachments 200 and 300 without a safety system (e.g., safety device 1227), the aforementioned danger can be mitigated by an integrated braking device on each of the sliding attachments provided for the rear wheel 140, which is designed to be voluntarily activated by the user of the trolley 100, in particular by means of a foot control device, and works by preventing the sliding attachment from sliding on the snow.

Claims

1. A sliding attachment (200; 300; 1200; 1300) for a trolley (100), comprising: - Base plate (210; 1210), the base plate has an elongated shape along a first axis (XX) and presents a first side and a second side opposite to each other according to a second axis (ZZ) perpendicular to the first axis, the base plate having a snow-sliding surface (210A; 1210A) on the first side of the base plate, and - A clamp (220; 1220), which is supported by the base plate (210; 1210), arranged on the second side of the base plate, and detachably attached to the wheel (130) of the trolley (100). The clamp (220; 1220) defines a housing (221; 1221) for receiving the lower part of the wheel (130), the housing being open in a direction opposite to the first side of the base plate (210; 1210) according to the second axis (ZZ), and the housing being fixedly defined by a bottom wall (222; 1222) and two side walls (223; 1223), the bottom wall being arranged transversely to the second axis (ZZ), and the two side walls being arranged substantially parallel to the first axis (XX) and the second axis (ZZ) and oriented toward each other according to a third axis (YY) perpendicular to the first axis and the second axis. Each of the two sidewalls (223; 1223) is provided with a protrusion (224; 1224) that protrudes from the remainder of the respective sidewall toward the other sidewall according to the third axis (YY). The aforementioned protrusions (224; 1224) are jointly arranged to cooperate by contacting the tire (131) of the wheel (130) so as to reversibly transform the sliding attachment between the sliding attachment and the wheel according to the relative displacement of the second axle (ZZ): - Operating configuration, wherein the protrusions (224; 1224) press the tire (131) against the bottom wall (222; 1222) according to the second shaft (ZZ) so as to wed the lower part of the tire into the lower part of the housing (221; 1221) to attach the sliding attachment to the wheel, and - Non-operational configuration, wherein the sliding attachment is detached from the wheel, and during the transition of the sliding attachment between the operational configuration and the non-operational configuration, the tire is elastically compressed by the protrusion according to the third axis (YY).

2. The sliding attachment according to claim 1, wherein, The protrusions (224; 1224) of each sidewall (223; 1223) are inclined so that when the sliding attachments (200; 300; 1200; 1300) transition from one of the operating configurations and the non-operating configurations to the other configuration, the tires (131) of the wheel (130) are gradually compressed toward the other sidewall.

3. The sliding attachment according to claim 2, wherein, In a cross section relative to the third axis (YY), each protrusion (224; 1224) presents a "V" shaped profile or a "V" shaped profile truncated at the tip of the "V".

4. The sliding accessory according to any one of claims 1 to 3, wherein, In the protrusions on the corresponding sidewalls (223; 1223) according to the third axis (YY), each protrusion (224; 1224) presents an arched shape, which bulges towards the bottom wall (222; 1222) into a dome shape.

5. The sliding attachment according to claim 4, wherein, When the sliding attachments (200; 300; 1200; 1300) are in the operating configuration, each protrusion (224; 1224) presents a profile matching the curvature of the tire (131) on the side facing the bottom wall (222; 1222).

6. The sliding accessory according to any one of claims 1 to 3, wherein, Each protrusion (224; 1224) is composed of a plurality of elements (224.1, 224.2, 224.3) separated from each other along the first axis (XX).

7. The sliding attachment according to any one of claims 1 to 3, wherein, The housing (221; 1221) is further fixedly defined by a front wall (225; 1225) and a rear wall (226; 1226), the front wall and the rear wall being arranged toward each other according to the first axis (XX), and connecting each of the two side walls (223; 1223) to each other. When the sliding attachments (200; 300; 1200; 1300) are in the operating configuration, the front wall (225; 1225) and the rear wall (226; 1226) cooperate by contacting the tire (131) at the lower part of the wheel, and the front wall (225; 1225) and the rear wall (226; 1226) are able to form corresponding abutments for the lower part of the wheel (130) according to the first axle (XX).

8. The sliding accessory according to any one of claims 1 to 3, wherein, The base plate (210; 1210) and the sleeve (220; 1220) are integrally formed.

9. The sliding accessory according to claim 8, wherein, To demold the sliding attachments (200; 300; 1200; 1300), the base plate (210; 1210) is provided with a through-hole (216) that connects the first side and the second side of the base plate to each other, and the through-hole is arranged in a straight line along the second axis (ZZ) on the raised portion (224; 1224).

10. The sliding accessory according to any one of claims 1 to 3, wherein, The bottom wall (222) is formed by a portion of a tube centered on a geometric axis (Y222) parallel to the third axis (YY), and its concave surface faces the first side away from the bottom plate (210).

11. The sliding accessory according to any one of claims 1 to 3, wherein, The bottom wall (1222) is substantially flat and is formed by the bottom plate (1210).

12. A transport component (1), comprising: - A trolley (100) comprising at least one front wheel (130) and two rear wheels (140), each of the front wheels having a tire (131) that is elastically deformable by compression, and - A sliding attachment (200; 300; 1200; 1300) for each of the front wheels, the sliding attachment being the sliding attachment according to any one of claims 1 to 3, and in an operating configuration, the sliding attachment being attached to the respective front wheel.

13. The transport component according to claim 12, wherein, The tire (131) of each of the front wheels (130) is supported by the rim (132) of the front wheel and protrudes from the rim on each side of the front wheel to form two bead (135). When the tires are stationary, the width of the tire (131) of each of the front wheels (130) at the level of the bead (135) is less than or equal to the spacing between the sidewalls (223; 1223) outside the protrusions (224; 1224) according to the third axis (YY), and greater than the spacing between the protrusions according to the third axis. Along the third axis (YY), the spacing between the protrusions (224; 1224) is equal to or greater than the width of the rim (132) of each of the front wheels (130).

14. The transport component according to claim 12 or 13, wherein, Each of the front wheels (130) is mounted on the front portion of the frame (110) of the trolley (100) and connected to the front portion of the frame so as to pivot freely about a pivot axis that extends radially or orthogonally to the rotation axis (R130) of the front wheel. When the front wheels or each front wheel (130) and the associated sliding attachments (200; 300; 1200; 1300) are attached to each other in the operating configuration, the trolley (100) is still able to operate in turn by pivoting the front wheels relative to the frame (110).

15. The transport component according to any one of claims 12 or 13, wherein, The housing (221; 1221) is also fixedly defined by a front wall (225; 1225) and a rear wall (226; 1226), the front wall and the rear wall being arranged toward each other according to the first axis (XX), and connecting each of the two side walls (223; 1223) to each other. When the sliding attachments (200; 300; 1200; 1300) are in the operating configuration, they cooperate by contacting the tire (131) at the lower part of the wheel, and the front wall (225; 1225) and the rear wall (226; 1226) are able to form corresponding abutments for the lower part of the wheel (130) according to the first axle (XX), and The front wall (225; 1225) and the rear wall (226; 1226) are spaced apart from each other along the first axis (XX) at the opening of the housing (221; 1221), and the distance between the front wall (225; 1225) and the rear wall (226; 1226) is less than the outer diameter of the tire (131).

Images