Wheel cleaning device

Abstract

To provide a wheel cleaning device capable of cleaning the bottom and side surfaces of a wheel with a simple structure. [Solution] A wheel cleaning device is configured by connecting rails 4,6 having a pair of brushes 12,14 arranged along side walls 42,44 and side walls 62,64 and a mat with brushes 16 laid on a running surface 40,60 by link arms 8,10 so that the distance between them can be changed. This allows the rolling surface and side of wheels 92,92,92,92 of a wheeled suitcase 90 or the like to be cleaned simultaneously. In addition, since the distance between the rails 4,6 can be changed, it is possible to clean various pairs of wheels with different wheel-to-wheel distances. In addition, since the distance between the rails 4,6 can be changed, it is possible to prevent the device from becoming large in the wheel-to-wheel distance direction.

Description

[Technical field]

[0001] The present invention relates to a wheel cleaning device for cleaning a pair of left and right wheels. [Background technology]

[0002] JP 2018-65072 A (Patent Document 1) describes a cleaning device comprising a housing, a pair of rotating brushes rotatably supported on the housing so that their rotation axes are coaxial, a pair of electric rollers arranged to face each of the rotating brushes and rotatably supported on the housing, and a chain wound around the rotating brushes and the electric rollers. With a caster supported between the rotating brushes and the electric rollers, the electric rollers are rotated to rotate the rotating brushes in the same direction as the electric rollers to clean the caster.

[0003] Since the wheel cleaning device is configured so that the rotating brush and electric roller each extend parallel to the axial direction of the caster's rotation shaft, it is capable of cleaning various pairs of casters with different caster pitches (the distance between a pair of casters). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-65072 A (Patent Document 1) Summary of the Invention [Problem to be solved by the invention]

[0005] However, the wheel cleaning device described in the above publication requires the rotating brush to rotate and needs to be able to clean various pairs of casters with different caster pitches (the distance between a pair of casters), which not only makes the structure complex but also makes the device larger in the caster pitch direction.

[0006] The present invention has been made in consideration of the above, and one of its objects is to provide a wheel cleaning device that has a simple structure and is capable of cleaning various pairs of casters with different caster pitches (the distance between a pair of casters) while preventing the device from becoming too large. [Means for solving the problem]

[0007] In order to achieve the above object, the wheel cleaning device of the present invention employs the following means.

[0008] According to a preferred embodiment of the wheel cleaning device of the present invention, a wheel cleaning device for cleaning a pair of left and right wheels is configured. The wheel cleaning device includes first and second rail portions, a first cleaning member, and a connecting portion. The first and second rail portions have a running surface on which the pair of left and right wheels can run, and a pair of side walls vertically disposed on both ends of the running surface in the extending direction of the running surface. The first cleaning member is disposed along each of the pair of side walls of the first and second rail portions. . Ren The connecting portion connects the first and second rail portions so that the distance between the first and second rail portions can be freely changed. The connecting portion has a longitudinal direction and a first end and a second end in the longitudinal direction, and the first end of the connecting portion is pivotally connected to the first rail portion and the second end of the connecting portion is pivotally connected to the second rail portion. Here, the second cleaning member in the present invention typically corresponds to a brush. For example, a coil brush can be adopted as the first cleaning member.

[0009] According to the present invention, the first and second rail portions extend along the running direction of the wheels, and the distance between the first and second rail portions can be changed by the connecting member, so that it is possible to clean various pairs of wheels with different inter-wheel distances. In addition, since the distance between the first and second rail portions can be changed, it is possible to prevent the device from becoming large in the inter-wheel distance direction. Of course, the side surface of the wheel can be cleaned by the first cleaning member. In addition, the first end of the connecting portion is swingably connected to the first rail portion, and the second end of the connecting portion is swingably connected to the second rail portion, so that the distance between the first and second rail portions can be changed with a simple configuration.

[0010] According to a further embodiment of the wheel cleaning device of the present invention, the wheel cleaning device further comprises a second cleaning member laid on the travel surface.

[0011] According to this aspect, at least the rolling surface of the wheel can be cleaned by the second cleaning member.

[0012] In a further aspect of the wheel cleaning device of the present invention, the coupling portion has a longitudinal direction and a first end and a second end in the longitudinal direction, and the first end of the coupling portion is swingably coupled to the first rail portion and the second end of the coupling portion is swingably coupled to the second rail portion.

[0013] According to this embodiment, the distance between the first and second rail portions can be changed with a simple configuration.

[0020] According to a further aspect of the wheel cleaning device of the present invention, at least one of the first rail portion and the second rail portion has a pair of inclined side walls, at least on one of both ends in the extension direction of the pair of side walls, which have a slope that moves away from each other toward the tip.

[0021] According to this aspect, the wheels can be smoothly introduced into and led out of the first rail portion or the second rail portion.

[0022] According to a further aspect of the wheel cleaning device of the present invention, at least one of the first rail portion and the second rail portion has an inclined running surface having a downward slope toward the tip, at least on one of both ends in the extension direction of the running surface.

[0023] According to this aspect, the wheels can be smoothly introduced into and led out of the first rail portion or the second rail portion. Effect of the Invention

[0024] According to the present invention, a wheel cleaning device capable of cleaning the bottom and side surfaces of wheels can be realized with a simple configuration. [Brief description of the drawings]

[0025] [Figure 1] 1 is a schematic diagram showing an outline of the configuration of a wheel cleaning device 1 according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a plan view of a wheel cleaning device 1 according to an embodiment of the present invention, as viewed from above. [Diagram 3] FIG. 3 is a side view seen from the direction of arrow V in FIG. 2. [Figure 4] FIG. 1 is a front view of a wheel cleaning device 1 according to an embodiment of the present invention, as viewed from one side in the direction in which rails 4 and 6 extend. [Diagram 5] FIG. 2 is a perspective view showing the appearance of rails 4 and 6. [Figure 6] FIG. 2 is a perspective view showing the appearance of link arms 8 and 10. [Figure 7] 1 is an explanatory diagram showing the state of connection between rails 4, 6 and link arms 8, 10. FIG. [Figure 8] 3 is a cross-sectional view showing the XX section of FIG. 2. [Figure 9] 1 is an explanatory diagram showing the state of wheels 92, 92 of a wheeled suitcase 90 immediately before cleaning begins. [Figure 10] 13 is an explanatory diagram showing the start of cleaning of wheels 92, 92 of a wheeled suitcase 90. FIG. [Figure 11] 1 is a side view showing the wheels 92, 92 of a wheeled suitcase 90 being cleaned. FIG. [Figure 12] 1 is a front view of a wheeled suitcase 90, showing the wheels 92, 92 being cleaned. FIG. [Figure 13] FIG. 2 is an explanatory diagram showing the stored state of the wheel cleaning device 1. [Figure 14] 1 is an exploded perspective view showing an outline of a configuration in which rails 4, 6 are swingably connected using slide arms 108, 110. FIG. [Figure 15] 1 is an explanatory diagram showing the state of engagement between the rail 6 and the slide arms 108 and 110. FIG. [Figure 16] 13 is an enlarged view showing a main part of a wheel cleaning device 200 according to a modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Next, the best mode for carrying out the present invention will be described with reference to examples. EXAMPLES

[0027] As shown in FIG. 1, the wheel cleaning device 1 of this embodiment is configured as a device for cleaning, for example, the wheels (casters) 92 of a wheeled suitcase (also called a wheeled carry case or a wheeled carry bag) 90 (see FIG. 11), and as shown in FIGS. 1 to 4, it is equipped with a pair of rails 4, 6, a pair of link arms 8, 10 connecting the rails 4, 6, a pair of brushes 12, 14 arranged on each of the rails 4, 6, and a brush-equipped mat 16 arranged on each of the rails 4, 6.

[0028] As shown in Fig. 5, the rails 4, 6 have running surfaces 40, 60 and a pair of side walls 42, 44, 62, 64 that are vertically attached integrally to the running surfaces 40, 60. In other words, the rails 4, 6 have a substantially U-shaped cross section cut along a plane perpendicular to the extending direction. The rails 4, 6 are examples of embodiments corresponding to the "first rail portion" and the "second rail portion" of the present invention, respectively.

[0029] As shown in Fig. 5, the running surfaces 40 and 60 have through holes 41a, 41b, 61a, and 61b. The through hole 41a is disposed at a position closer to one end of the running surface 40 in the extension direction, and the through hole 41b is disposed at a position closer to the center of the running surface 40 than the other end of the running surface 40 in the extension direction. The through hole 61a is disposed at a position closer to the other end of the running surface 60 in the extension direction, and the through hole 61b is disposed at a position closer to the center of the running surface 60 in the extension direction than the one end of the running surface 60 in the extension direction. More specifically, the through holes 41a, 41b, 61a, and 61b are disposed in a positional relationship such that an imaginary line connecting the center of the through hole 41a and the center of the through hole 61a and an imaginary line connecting the center of the through hole 41b and the center of the through hole 61b are perpendicular to the extension direction of the rails 4 and 6.

[0030] The running surfaces 40, 60 have inclined running surfaces 40a, 40b, 60a, 60b. The inclined running surfaces 40a, 40b, 60a, 60b are disposed at the ends of the running surfaces 40, 60 (rails 4, 6) in the extending direction. The inclined running surfaces 40a, 40b, 60a, 60b have a downward inclination toward their tips. The side walls 42, 44, 62, 64 are vertically provided at both ends of the running surfaces 40, 60 in the extending direction of the running surfaces 40, 60.

[0031] 5, the side walls 42, 44, 62, 64 have inclined side walls 42a, 42b, 44a, 44b, 62a, 62b, 64a, 64b. The inclined side walls 42a, 42b, 44a, 44b, 62a, 62b, 64a, 64b are disposed at both ends in the extending direction of the side walls 42, 44, 62, 64 (rails 4, 6). The inclined side walls 42a and 44a, the inclined side walls 42b and 44b, the inclined side walls 62a and 64a, and the inclined side walls 62b and 64b have inclinations in directions that move away from each other toward their respective tips.

[0032] The link arms 8 and 10 have basically the same configuration, and as shown in FIG. 6, when viewed from one side in the longitudinal direction, they have a substantially inverted U-shape. The link arms 8 and 10 also have through holes 8a, 8b, 10a, and 10b. The through holes 8a and 10a and the through holes 8b and 10b are disposed at positions spaced apart from each other at the longitudinal ends of the link arms 8 and 10. The through holes 8a, 8b, 10a, and 10b have substantially the same inner diameter as the through holes 41a, 41b, 61a, and 61b. The link arm 8 corresponds to the "connecting portion" and the "first connecting portion" in the present invention, and the link arm 10 corresponds to the "connecting portion" and the "second connecting portion" in the present invention.

[0033] The link arms 8, 10 thus constructed are swingably assembled to the rails 4, 6 by the collared bolts BLT as shown in FIG. 7. Specifically, first, the through holes 8a, 8b, 41a, 10a, 61b, and 10b are aligned with each other, and the collared bolts BLT are inserted from the through holes 41a, 41b, 61a, and 61b. Next, the link arms 8, 10 are swingably assembled to the rails 4, 6 by screwing the nuts N into the collared bolts BLT. In other words, the wheel cleaning device 1 has a pantograph structure. Here, when the rails 4, 6 are at their furthest distance from each other, the rails 4, 6 and the link arms 8, 10 are perpendicular to each other. In addition, the collar portion Cp of the collared bolt BLT has an axial length slightly larger than the combined thickness of the running surfaces 40, 60 and the link arms 8, 10, and has an outer diameter slightly smaller than the inner diameter of the through holes 8a, 8b, 10a, 10b, 41a, 41b, 61a, 61b.

[0034] In this embodiment, the brushes 12 and 14 are twisted brushes in which two to four wires are twisted and bristles are planted between the wires. As shown in Figs. 1 to 3, the brushes 12 and 14 have a length that is approximately equal to the length of the side walls 42, 44, 62, and 64 in the extending direction, excluding the inclined side walls 42a, 42b, 44a, 44b, 62a, 62b, 64a, and 64b. As shown in Figs. 3 and 4, the brushes 12 and 14 have a diameter that is larger than the height of the side walls 42, 44, 62, and 64. It is preferable that the brushes 12 and 14 have a radius that is larger than the height of the side walls 42, 44, 62, and 64. Furthermore, the brushes 12 and 14 are arranged in such a relationship that the distance (minimum distance) Dmin between the tips of the bristles at the closest points is smaller than the width W of the wheels (casters) 92, as shown in Fig. 7. The brushes 12, 14 are fixed to the side walls 42, 44, 62, 64 by cable ties 80 at several points spaced apart in the extending direction (see Figs. 3 and 8). The brushes 12, 14 are one example of a feature that corresponds to the "first cleaning member" of this invention.

[0035] The brush mat 16 has a structure in which bristles are implanted in a sheet material, as shown in Fig. 16. The brush mat 16 is laid over the entire length of the running surfaces 40, 60, that is, over the entire area from the inclined running surfaces 40a, 60a to 40b, 60b, as shown in Fig. 1 and Fig. 2. The brush mat 16 is an example of an embodiment corresponding to the "second cleaning member" in the present invention.

[0036] Next, the operation of the wheel cleaning device 1 configured in this manner, particularly the operation when cleaning the wheels (casters) 92 of a wheeled suitcase (also called a wheeled carry case or wheeled carry bag) 90, will be described.

[0037] First, for example, the wheel cleaning device 1 is placed on the floor in a state as shown in Fig. 9. In this state, the wheeled suitcase 90 is operated so that the front left wheel 92 of the four wheels 92, 92, 92, 92 of the wheeled suitcase 90 travels on the inclined travel surface 40b. Next, as shown in Fig. 10, the link arms 8, 10 are swung around the collared bolts BLT, BLT on the rail 4 side as fulcrums so that the rail 6 is aligned with the travel line TL of the front right wheel 92. This allows the left and right wheels 92, 92 of the wheeled suitcase 90 to travel on the rails 4, 6 (see Fig. 12). Here, since the rails 4, 6 have inclined running surfaces 40a, 40b, 60a, 60b as well as inclined side walls 42a, 42b, 44a, 44b, 62a, 62b, 64a, 64b, the four wheels 92, 92, 92, 92 of the wheeled suitcase 90 can be smoothly introduced and removed from the running surfaces 40, 60.

[0038] Then, by moving the wheeled suitcase 90 in this state (see FIG. 11), the rolling surfaces and sides of the four wheels 92, 92, 92, 92 of the wheeled suitcase 90 are cleaned by the brushes 12, 14 and the brush mat 16, as shown in FIG.

[0039] Thus, according to the present embodiment, the distance between the rails 6,4 can be changed with a simple configuration of only swinging the other rail 4,6 relative to the rail 6,4, so that cleaning of various wheels 92,92 with different distances between the wheels 92,92 can be accommodated. Since the distance between the rails 4,6 can be changed, it is possible to prevent the device itself from becoming large in the direction of the distance between the wheels. In addition, since the rails 4,6 are connected by two link arms 8,10, the distance between the rails 4,6 can be changed stably.

[0040] 13, the distance between the rails 4 and 6 can be minimized by swinging the rails 4 and 6 until the side walls 44 and 62, or the inclined side walls 44a and 62a, and the inclined side walls 44b and 62b come into contact with each other. This allows the size to be made compact when stored.

[0041] In the present embodiment, the rails 4, 6 are swingably connected by two link arms 8, 10, but this is not limiting. The rails 4, 6 may be swingably connected by three or more link arms, or may be swingably connected by one link arm.

[0042] In this embodiment, the rails 4, 6 are configured to have the inclined running surfaces 40a, 40b, 60a, 60b at both ends in the extending direction of the rails 4, 6, but the rails 4, 6 may be configured to have the inclined running surface 40a, 60a or the inclined running surface 40b, 60b only at one of the ends in the extending direction of the rails 4, 6. In this case, it is desirable to introduce the wheels 92, 92 from the side having the inclined running surface 40a, 60a or the inclined running surface 40b, 60b.

[0043] In this embodiment, the rails 4, 6 are configured to have the inclined side walls 42a, 42b, 44a, 44b, 62a, 62b, 64a, 64b at both ends in the extending direction of the rails 4, 6, but the rails 4, 6 may be configured to have the inclined side wall 42a, 44a, 62a, 64a, 64b or the inclined side wall 42b, 44b, 62b, 64b only at one of the ends in the extending direction of the rails 4, 6. In this case, it is desirable to introduce the wheels 92, 92 from the side having the inclined side wall 42a, 44a, 62a, 64a, 64b or the inclined side wall 42b, 44b, 62b, 64b.

[0044] In this embodiment, the rails 4, 6 are swingably connected using the link arms 8, 10, but this is not limiting. For example, the rails 4, 6 may be swingably connected using a slide rail. In this case, either one of the inner rail constituting the slide rail and the outer rail slidably engaged with the inner rail may be fastened to the rail 4, and the other of the inner rail and the outer rail may be fastened to the rail 6. This configuration can also achieve the same effects as the wheel cleaning device 1 according to the embodiment described above. Moreover, instead of the slide rail, the rails 4, 6 may be swingably connected using slide arms 108, 110 shown in FIG. 14.

[0045] The slide arms 108, 110 have the same configuration as the link arm 10, except that the through holes 8a, 10a are replaced with long holes 108a, 110a. Therefore, the same parts of the slide arms 108, 110 as those of the link arms 8, 10 are given the same reference numerals and detailed description thereof is omitted. The slide arm 108 corresponds to the "connecting portion" and the "first connecting portion" in the present invention, and the slide arm 110 is an example of an embodiment corresponding to the "connecting portion" and the "second connecting portion" in the present invention.

[0046] 14 and 15, the slide arms 108, 110 have through holes 8b, 10b at one end in the longitudinal direction and long holes 108a, 108b at the other end in the longitudinal direction. The long holes 108a, 108b extend along the longitudinal direction of the slide arms 108, 110.

[0047] 14, in the slide arms 108, 110 thus configured, a fastening member such as a bolt is inserted from the through holes 41a, 41b side with the through holes 8b, 10b aligned with the through holes 41b, and a nut is screwed into the bolt from the through holes 8b, 10b side, whereby one end in the longitudinal direction of the slide arms 108, 110 (the end on the side where the through holes 8b, 10b are arranged) is fastened (fixed) to the rail 4. Meanwhile, the other end in the longitudinal direction of the slide arms 108, 110 (the end on the side where the long holes 108a, 110a are arranged) is connected to the rail 6 by engaging the slide guides 111a, 111b, which are integrated with the rail 6 on the bottom surface (the surface opposite to the running surface 60) of the rail 6 using a fastening member such as a bolt, with the long holes 108a, 110a.

[0048] 15, the rail 6 can move along the long holes 108a, 110a, so that the distance between the rail 4 and the rail 6 can be easily changed. As a result, the same effects as those of the wheel cleaning device 1 according to the present embodiment described above can be achieved.

[0049] In the present embodiment and the above-mentioned modified example, only the brush mat 16 is laid on the running surface 40, 60, but this is not limiting. For example, as shown in FIG. 16, if a wheeled suitcase (also called a wheeled carry case or wheeled carry bag) has a plurality of wheels (casters) 292 of the same size (two in FIG. 16) per wheel, that is, a so-called double-wheel structure (double tire structure in FIG. 16), a brush 212 can be further arranged at a position corresponding to the space between the plurality of wheels (casters) 292 on the running surface 40, 60. With this configuration, when the wheeled suitcase (also called a wheeled carry case or wheeled carry bag) has a so-called double-wheel structure, the side surface between the plurality of wheels 292 can be cleaned well. The brush 212 corresponds to the "first" brush 212 of the present invention. 3 This is an example of an embodiment corresponding to the "cleaning member."

[0050] In the present embodiment and the above-described modified example, the brushes 12 and 14 are configured to use twisted brushes, but this is not limited to this. Any brush may be used as long as it has bristles that cross the side surfaces of the wheels 92 and 292.

[0051] In the present embodiment and the above-mentioned modified example, the brush mat 16 is laid on the running surface 40, 60, but this is not limited to this. As long as the rolling surface of the wheels 92, 292 can be cleaned, for example, an adhesive sheet may be laid. Note that it is not necessary to lay a member for cleaning the rolling surface of the wheels 92, 292 (brush mat 16 or adhesive sheet) on the running surface 40, 60.

[0052] In the present embodiment and the above-mentioned modified example, the wheel cleaning device 1 according to the present embodiment is applied to cleaning the wheels (casters) 92 of a wheeled suitcase (also called a wheeled carry case or wheeled carry bag) 90, but the present invention is not limited to this. For example, the wheel cleaning device 1 according to the present embodiment can be applied to cleaning the wheels of a shopping cart, wheelchair, etc.

[0053] The present embodiment shows an example of a mode for carrying out the present invention, and therefore the present invention is not limited to the configuration of the present embodiment.

[0054] <Additional Notes> In consideration of the above-mentioned gist of the invention, the wheel cleaning device according to the present invention can be configured in the following aspects. (Aspect 1) "A wheel cleaning device for cleaning a pair of left and right wheels, A first and second rail portion having a running surface on which the pair of left and right wheels can run and a pair of side walls vertically provided on both ends of the running surface in the extending direction of the running surface; a first cleaning member disposed along each of the pair of side walls; a connecting portion that connects the first and second rail portions so as to freely change the distance between the first and second rail portions; Equipped with 、 The connecting portion has a longitudinal direction and a first end and a second end in the longitudinal direction, the first end being pivotally connected to the first rail portion and the second end being pivotally connected to the second rail portion. Wheel cleaning device. ” (Aspect 2) "Furthermore, a second cleaning member is provided on the travel surface. The wheel cleaning device according to the first aspect. (Aspect 3) At least one of the first rail portion and the second rail portion has a pair of inclined side walls at least on either end of the pair of side walls in the extending direction, the inclination of the side walls being such that the inclination is greater in a direction ... The above aspects 1 or 2 The wheel cleaning device described in (Aspect 4) At least one of the first rail portion and the second rail portion has an inclined running surface having a downward slope toward a tip end on at least one of both ends of the running surface in the extending direction. The above aspects 1 to 3 The wheel cleaning device according to any one of the above. (Aspect 5) " The cleaning device further includes a third cleaning member disposed at a position on the travel surface corresponding to a position between the pair of first cleaning members. The wheel cleaning device according to any one of the first to fourth aspects. [Explanation of symbols]

[0055] 1 Wheel cleaning device (wheel cleaning device) 4 Rail (first rail section) 6 Rail (Second rail section) 8 Link arm (connection part, first connection part) 8a through hole 8b Through hole 10 Link arm (connection part, second connection part) 10a through hole 10b Through hole 12 Brush (first cleaning member) 14 Brush (first cleaning member) 16 Brush mat (second cleaning material) 40 Running surface (running surface) 40a Inclined running surface (inclined running surface) 40b Inclined running surface (inclined running surface) 41a Through hole 41b Through hole 42a Slanted side wall (slanted side wall) 42b Slanted side wall (slanted side wall) 42 Sidewall (Sidewall) 44 Sidewall (Sidewall) 44a Slanted side wall (slanted side wall) 44b Slanted side wall (slanted side wall) 60 Running surface (running surface) 60a Inclined running surface (inclined running surface) 60b Inclined running surface (inclined running surface) 61a Through hole 61b Through hole 62 Sidewall (Sidewall) 62a Slanted side wall (slanted side wall) 62b Slanted side wall (slanted side wall) 64 Sidewall (Sidewall) 64a Slanted side wall (slanted side wall) 64b Slanted side wall (slanted side wall) 80 Cable Ties 90 Wheeled suitcase 92 Wheels (Wheels) 108 Slide arm (connection part, first connection part) 108a Long hole (long hole) 110 Slide arm (connection part, second connection part) 110a Long hole (long hole) 111a Slide Guide 111b Slide Guide 200 Wheel cleaning device (wheel cleaning device) 212 Brush (No. 3 Cleaning materials) 292 Wheels (Wheels) BLT Collared Bolt Cp Color Section TL Driving Line

Claims

1. A wheel cleaning device for cleaning a pair of left and right wheels, a first and second rail portion having a running surface on which the pair of left and right wheels can run and a pair of side walls vertically provided on both ends of the running surface in the extending direction of the running surface; a first cleaning member disposed along each of the pair of side walls; a connecting portion that connects the first and second rail portions so as to freely change the distance between the first and second rail portions; Equipped with The connecting portion has a longitudinal direction and a first end and a second end in the longitudinal direction, the first end being pivotally connected to the first rail portion and the second end being pivotally connected to the second rail portion. Wheel cleaning device.

2. The cleaning device further includes a second cleaning member installed on the travel surface.

2. A wheel cleaning device according to claim 1.

3. At least one of the first rail portion and the second rail portion has a pair of inclined side walls at least on either end of the pair of side walls in the extending direction, the inclinations of which are inclined in directions that move away from each other toward the tips.

3. A wheel cleaning device according to claim 1 or 2.

4. At least one of the first rail portion and the second rail portion has an inclined running surface having a downward slope toward a tip end on at least one of both ends of the running surface in the extending direction.

3. A wheel cleaning device according to claim 1 or 2.

5. A wheel cleaning device for cleaning a pair of left and right wheels, a first and second rail portion having a running surface on which the pair of left and right wheels can run and a pair of side walls vertically provided on both ends of the running surface in the extending direction of the running surface; a first cleaning member disposed along each of the pair of side walls; a connecting portion that connects the first and second rail portions so as to freely change the distance between the first and second rail portions; a third cleaning member disposed at a position corresponding to a position between the pair of first cleaning members on the travel surface; A wheel cleaning device comprising:

6. The connecting portion has a longitudinal direction and a first end and a second end in the longitudinal direction, the first end being swingably connected to the first rail portion and the second end being swingably connected to the second rail portion.

6. A wheel cleaning device according to claim 5.

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