Washing device

Abstract

To provide a washing device capable of suitably discharging cleaning liquid.SOLUTION: A washing device 1 is used to wash the exterior surface of a train. The washing device 1 comprises a pipe 2 for washing which discharges washing liquid, and an air pipe 4 which discharges air. A tip part 4a of the air pipe 4 comprises inner cylindrical parts 5 and 15 and outer cylindrical parts 6 and 16 disposed to go around the outsides of the inner cylindrical parts 5 and 15 and is configured so as for air to pass through each of the inner cylindrical parts 5 and 15 and the outer cylindrical parts 6 and 16. The inner cylindrical parts 5 and 15 and the outer cylindrical parts 6 and 16 are each extended in a center axis direction of the air pipe 4. The pipe 2 for washing is disposed inside in a radial direction of the inner cylindrical parts 5 and 15.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cleaning device for trains.

Background Art

[0002] Since the dirt on railway vehicles includes dirt derived from metals (such as iron powder), it is difficult to sufficiently remove the dirt even when the surface of the railway vehicle body is cleaned using a general car washer. Therefore, the railway vehicle is cleaned manually. More specifically, a cleaning liquid obtained by mixing raw water and a chemical solution is discharged onto the vehicle body surface, and the vehicle body surface is cleaned manually using a brush.

[0003] On the other hand, Patent Document 1 describes a cleaning device including a cleaning chemical solution tank, a water tank, a chemical solution pump, a high-pressure water pump, and an arm, and having a nozzle for injecting the chemical solution and high-pressure water at the tip of the arm.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the cleaning device described in Patent Document 1 may cause uneven discharge of the cleaning liquid due to the influence of the surrounding environment such as strong wind or rainfall, and in order to suppress these influences, the cleaning liquid must be discharged in a state close to the discharge target site, leaving room for improvement.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to provide a cleaning device capable of preferably discharging a cleaning liquid.

Means for Solving the Problems

[0007] The cleaning device according to the present invention is a cleaning device used for cleaning the exterior surface of a train, comprising a cleaning pipe for discharging cleaning fluid and an air pipe for discharging air, wherein the tip of the air pipe comprises an inner cylindrical portion and an outer cylindrical portion disposed around the outside of the inner cylindrical portion, the air is configured to pass through the inner cylindrical portion and the outer cylindrical portion, the inner cylindrical portion and the outer cylindrical portion extend in the direction of the central axis of the air pipe, and the cleaning pipe is disposed radially inward of the inner cylindrical portion. Furthermore, the system includes a rinsing pipe having a discharge section for discharging rinsing liquid, and the discharge section of the rinsing pipe is disposed between the inner cylindrical section and the outer cylindrical section when viewed from the front. It is characterized by the following. Furthermore, the cleaning device according to the present invention is a cleaning device used for cleaning the exterior surface of a train, comprising a cleaning pipe for discharging cleaning fluid and an air pipe for discharging air, wherein the tip of the air pipe comprises an inner cylindrical portion and an outer cylindrical portion disposed around the outside of the inner cylindrical portion, the air is configured to pass through the inner cylindrical portion and the outer cylindrical portion, the inner cylindrical portion and the outer cylindrical portion extend in the direction of the central axis of the air pipe, and the cleaning pipe is disposed radially inward of the inner cylindrical portion. The inner cylindrical portion is formed in a tapered shape that narrows towards the tip, and further comprises a rinsing pipe having a discharge portion for discharging rinsing liquid, the inner cylindrical portion is provided with an insertion portion that penetrates in the thickness direction for passing the rinsing pipe, the rinsing pipe passes from the inside of the inner cylindrical portion through the insertion portion from the inside to the outside in the radial direction, and the portion of the rinsing pipe closer to the tip than the insertion portion is disposed between the inner cylindrical portion and the outer cylindrical portion. [Effects of the Invention]

[0008] According to the present invention, when discharging the cleaning fluid, the air passing through the inner and outer cylindrical portions, which are formed in a circular manner, can improve the straightness of the flow and reduce unevenness in the discharge. [Brief explanation of the drawing]

[0009] [Figure 1] This is a perspective view of the cleaning apparatus according to this embodiment. [Figure 2] This is a front view of the cleaning device. [Figure 3] This is a cross-sectional view of the cleaning device, showing the III-III section in Figure 2. [Figure 4] This is a cross-sectional view of the cleaning piping. [Figure 5] This is a cross-sectional view of the rinsing pipe. [Figure 6] This is a perspective view showing the proximal nozzle. [Figure 7] This is a rear view of the proximal nozzle. [Figure 8] Figure 7 shows a cross-sectional view of the proximal nozzle at the VIII-VIII section. [Figure 9] This is a perspective view showing the nozzle at the front end. [Figure 10] This is a front view of the nozzle at the tip. [Figure 11] Figure 10 shows a cross-sectional view of the tip nozzle, specifically the section between XI and XI. [Figure 12]It is a perspective view of the holder.

Mode for Carrying Out the Invention

[0010] Hereinafter, the cleaning device 1 according to the embodiment of the present invention will be described. The drawings used in this embodiment illustrate the configuration, shape of the cleaning device of the present invention, and the arrangement of each member constituting the cleaning device, and do not limit the present invention. In all the drawings, the same reference numerals are given to the same components, and the overlapping descriptions are omitted as appropriate.

[0011] <Summary> First, the outline of the cleaning device 1 according to this embodiment will be described mainly with reference to FIGS. 1 to 3. FIG. 1 is a perspective view of the cleaning device 1 according to this embodiment, FIG. 2 is a front view of the cleaning device 1, and FIG. 3 is a cross-sectional view of the cleaning device 1 showing the III-III cross-section of FIG. 2.

[0012] The cleaning device 1 according to this embodiment is a cleaning device 1 used for cleaning the outer surface of a train (not shown). The cleaning device 1 includes a cleaning pipe 2 having a discharge part 2g for discharging a cleaning liquid (not shown) and an air pipe 4 having a discharge part 4g for discharging air. As shown in FIG. 3, the tip 4a of the air pipe 4 includes inner cylindrical parts 5, 15 and outer cylindrical parts 6, 16 arranged to go around the outside of the inner cylindrical parts 5, 15. Air is configured to pass through each of the inner cylindrical parts 5, 15 and the outer cylindrical parts 6, 16. The inner cylindrical parts 5, 15 and the outer cylindrical parts 6, 16 extend in the central axis direction of the air pipe 4 respectively. The cleaning pipe 2 is arranged radially inside the inner cylindrical parts 5, 15. More specifically, the discharge part 2g for discharging the cleaning liquid of the cleaning pipe 2 is arranged radially inside the inner cylindrical part 15.

[0013] The "outer surface of the train" includes the front surface of the train, as well as the side surface or the rear surface, or a combination thereof. In particular, the cleaning device 1 according to the present embodiment can be used not only for the "side surface" of the "outer surface of the train" where cleaning by the existing cleaning device is possible due to the relative movement with the cleaning device accompanying the train running, but also for the "front surface or rear surface of the train".

[0014] Specifically, conventionally, regarding the cleaning of the front surface or rear surface of the train, a board was laid across the cleaning platforms or boarding and alighting platforms (used during train maintenance and cleaning) arranged on both sides of the train, and scrubbing was performed manually by a deck brush. In contrast, according to the cleaning device 1, it is possible to suitably clean the front surface or rear surface of the train without relying solely on manual labor, and the work efficiency can be improved. Moreover, when cleaning the front surface or rear surface by the cleaning device 1, there is no interference with the overhead line (electric wire above the vehicle), and there is no risk of electric shock.

[0015] The "cleaning liquid" is, for example, a mixture of oxalic acid or phosphoric acid and cation-removed water. The "rinsing liquid" is, for example, water. In addition, the "circumference" includes not only the full circumference continuously formed over 360 degrees but also those formed intermittently over 360 degrees by forming a notch (insertion part) partially. "Extending in the central axis direction..." is not limited to those extending parallel to the central axis, but includes those extending obliquely with respect to the central axis and at least including a central axis direction component.

[0016] According to the above configuration, when discharging the cleaning liquid from the cleaning pipe 2, the cleaning liquid can be conveyed by the air passing through the inner cylindrical parts 5 and 15 formed circumferentially, and the air passing through the outer cylindrical parts 6 and 16 acts like an air curtain, which can enhance the straightness and reduce the discharge unevenness.

[0017] <Overall Configuration> Next, the overall configuration of the cleaning device 1 will be described. As shown in Figure 3, the cleaning device 1 comprises an air pipe 4, a cleaning pipe 2 and a rinsing pipe 3 inserted into the air pipe 4, and a cover 10 attached to the outer circumference of the tip 4a of the air pipe 4.

[0018] The cleaning device 1 does not have a brush and removes dirt by the reaction of the chemical solution (cleaning solution) by applying it, letting it sit for a while, and then rinsing it with water. However, it is not limited to this configuration, and the cleaning device 1 may also be equipped with a brush. Furthermore, the cleaning device 1 may be configured to dispense the coating agent, but the coating agent may also be applied manually.

[0019] The cover 10 is positioned so as to protrude beyond the end of the air pipe 4, and is positioned flush with the rinsing pipe 3 or protruding beyond the end. Furthermore, the cover 10 protrudes further forward than the air pipe 4, forming a kind of "overhang," which has the function of moderately suppressing the spread of the discharged air. Figure 3 shows an example where the rinsing pipe 3 and the cover 10 are positioned in the same location (flush surface). The cover 10 according to this embodiment is a porous sponge such as urethane for protecting the air piping 4.

[0020] <Piping for cleaning> Next, the cleaning pipe 2 will be described, mainly referring to Figure 4 in addition to Figures 1 to 3. Figure 4 is a cross-sectional view of the cleaning pipe 2. The cleaning piping 2 discharges cleaning foam and mainly consists of an elbow 2b, a nipple 2c connected to the elbow 2b via a socket 2e, and a foaming nozzle 2d connected to the nipple 2c via a socket 2f. The foaming nozzle 2d generates cleaning foam by creating negative pressure inside when the cleaning liquid reaches it, drawing in air. Note that the internal structure of the foaming nozzle 2d is omitted in Figure 4.

[0021] As shown in Figure 3, the discharge section 2g at the tip of the foaming nozzle 2d of the cleaning pipe 2 is positioned on the base end side of the tip side nozzle 30 (air pipe 4). Furthermore, since the cleaning pipe 2 is positioned radially inward from the inner cylindrical sections 5 and 15, the cleaning foam generated by the foaming nozzle 2d is carried by the air passing radially inside the inner cylindrical sections 5 and 15 and discharged from the discharge section 2g.

[0022] <Piping for rinsing> Next, the rinsing pipe 3 will be described, primarily with reference to Figures 1 through 3, as well as Figure 5. Figure 5 is a cross-sectional view of the rinsing pipe 3. The cleaning device 1 includes a cleaning pipe 2, an air pipe 4, and a rinsing pipe 3 having a discharge section 3g for discharging rinsing liquid (water). The discharge section 3g of the rinsing pipe 3 is located between the inner cylindrical section 15 and the outer cylindrical section 16 when viewed from the front of the discharge section 3g. With this configuration, when the rinsing liquid (water) is discharged, it can be discharged smoothly without mixing with the cleaning solution within the cleaning device 1.

[0023] Furthermore, the rinsing piping 3 mainly comprises a pipe 3a and a joint unit 3b provided at the base end of the pipe 3a and connected to a flexible tube (not shown). The rinsing pipe 3 is not shared with the cleaning pipe 2 that discharges cleaning foam, but is provided separately from the cleaning pipe 2. Therefore, the rinsing pipe 3 can discharge rinsing liquid (water) at high pressure, and since there is no cleaning liquid in the rinsing pipe 3, after cleaning with the cleaning pipe 2, only water can be immediately discharged from the rinsing pipe 3 to rinse.

[0024] At the tip end of pipe 3a, a bent portion 3c is formed that slopes diagonally upward from the horizontal portion towards the tip end and connects to the horizontal portion. From the inside of the inner cylindrical portion 15, passing through the slit 15a of the inner cylindrical portion 15, the bent portion 3c of pipe 3a located between the inner cylindrical portion 15 and the outer cylindrical portion 16 is the portion that passes through (intersects with) the slit 15a. The joint unit 3b is for connecting the rinsing pipe 3 to a flexible tube connected to a pump (not shown).

[0025] <Air Piping> Next, the air piping 4 will be explained, mainly with reference to Figures 1 to 3, as well as Figures 6 to 11. Figure 6 is a perspective view showing the proximal nozzle 20, Figure 7 is a rear view of the proximal nozzle 20, and Figure 8 is a cross-sectional view of the proximal nozzle 20 showing the VIII-VIII section in Figure 7. Figure 9 is a perspective view showing the tip nozzle 30, Figure 10 is a front view of the tip nozzle 30, and Figure 11 is a cross-sectional view of the tip nozzle 30 showing the XI-XI section in Figure 10.

[0026] The air piping 4 in this embodiment is for supplying compressed air to transport cleaning foam and water, is connected to a compressor (not shown), and is made of polyvinyl chloride resin.

[0027] The air piping 4 is equipped with a lower elbow 4b and an upper elbow 4c, and is configured to discharge cleaning liquid (cleaning foam) and water horizontally at a position higher than the lower elbow 4b. The cleaning pipe 2 and rinsing pipe 3 are introduced into the air piping 4 from the upper elbow 4c in a watertight manner by sealing with putty or the like. In this embodiment, the tip 4a of the air piping 4 is provided with a resin-made base nozzle 20 and a tip nozzle 30. The base nozzle 20 and the tip nozzle 30 may be integrally formed by integral molding.

[0028] As shown in Figure 6, the base nozzle 20 mainly comprises a mounting cylinder portion 9 located in the central part of a cross section perpendicular to the axial direction, an inner cylinder portion 5 located radially outside the mounting cylinder portion 9, and an outer cylinder portion 6 located radially outside the inner cylinder portion 5. The mounting cylinder portion 9 is through which the cleaning pipe 2 passes, and as shown in Figure 7, a grooved projection 9b is formed radially outward at a position opposite to the slit 5a formed in the inner cylinder portion 5. The straight portion of the rinsing pipe 3 adjacent to the base end of the bent portion 3c is attached to this grooved projection 9b.

[0029] Furthermore, as shown in Figure 8, the mounting cylinder portion 9 includes a straight portion 9c at the base end and a flared portion 9d whose outer surface becomes radially larger outward toward the tip side relative to the straight portion 9c (in other words, it becomes thicker).

[0030] As shown in Figures 9 to 11, the tip nozzle 30 mainly comprises a mounting cylinder portion 19 located in the central part of a cross section perpendicular to the axial direction, an inner cylinder portion 15 located radially outside the mounting cylinder portion 19, and an outer cylinder portion 16 located radially outside the inner cylinder portion 15. The mounting cylinder portion 19 is through which the cleaning pipe 2 passes, and extends axially from the base end surface of the tip nozzle 30 (inner cylinder portion 15, outer cylinder portion 16), but does not extend to the tip of the tip nozzle 30 (inner cylinder portion 15, outer cylinder portion 16). The tip surface of the mounting cylinder portion 19 is formed closer to the tip than to the center.

[0031] The mounting cylinder portion 9 (and mounting cylinder portion 19) and the inner cylinder portion 5 (and inner cylinder portion 15) are connected by a plurality of radially extending partition walls (inner partition walls 7, 17). Specifically, the base nozzle 20 shown in Figure 6 is provided with three inner partitions 7, and the tip nozzle 30 shown in Figure 10 is provided with three inner partitions 17, each spaced at 120-degree intervals. With these inner partitions 7 and 17 in place, the cross-section of the airflow path between the mounting cylinder 9 and the inner cylinder 5 is formed in a sector shape with a 120-degree central angle. Furthermore, among the airflow channel cross-sections between the mounting cylinder portion 9 and the inner cylinder portion 5, the channel cross-sections facing the slits 5a and 15a, where the rinsing pipe 3 is located, shall also be formed in a fan shape, excluding the notches caused by the slits 5a and 15a.

[0032] With the above configuration, a space can be provided between the mounting cylinder portion 9 (and mounting cylinder portion 19) and the inner cylinder portion 5 (and inner cylinder portion 15), while maintaining the relative position of the two, thereby stabilizing the airflow velocity and stabilizing the discharge of the cleaning solution.

[0033] The inner cylindrical section 5 (and inner cylindrical section 15) and the outer cylindrical section 6 (and outer cylindrical section 16) are connected by a plurality of radially extending partitions (outer partitions 8, 18). Specifically, the base nozzle 20 shown in Figure 6 is provided with three outer partitions 8, and the tip nozzle 30 shown in Figure 10 is provided with three outer partitions 18, each spaced at 120-degree intervals. With these outer partitions 8 and 18 in place, the cross-section of the airflow path between the inner cylinder 5 and the outer cylinder 6 is formed in a sector shape with a 120-degree central angle. Furthermore, among the airflow channel cross-sections between the inner cylindrical portion 5 and the outer cylindrical portion 6, the channel cross-sections facing the slits 5a and 15a, where the rinsing pipe 3 is located, are also formed in a fan shape, excluding the notches caused by the slits 5a and 15a.

[0034] With the above configuration, a space can be provided between the inner cylindrical portion 5 (and inner cylindrical portion 15) and the outer cylindrical portion 6 (and outer cylindrical portion 16), while maintaining the relative position of the two. This stabilizes the airflow velocity and allows for a favorable narrowing of the range of the cleaning solution. Furthermore, because the area where the rinsing pipe 3 is located is formed in a sector shape with a central angle of 120 degrees, the water flow velocity can be increased compared to a sector shape with a smaller central angle.

[0035] The inner cylindrical portion 5 (and the inner cylindrical portion 15) is formed in a tapered shape, becoming narrower towards the tip. Specifically, the inner cylindrical portion 15 of the tip nozzle 30 is located on the extension of the inner cylindrical portion 5 of the base nozzle 20, and the tip surface of the inner cylindrical portion 5 and the base end surface of the inner cylindrical portion 15 are formed to coincide. According to the above configuration, the tapered inner cylindrical portion 5 (and inner cylindrical portion 15) makes it possible to increase the flow velocity of the chemical solution on the outflow side of the inner cylindrical portion 5 (inner cylindrical portion 15) compared to the inflow side, or to suppress a decrease in the flow velocity.

[0036] As shown in Figure 3, the outer cylindrical portions 6 and 16 in this embodiment are formed in a straight tubular shape. However, the configuration is not limited to this, and the outer cylindrical portion 6 (outer cylindrical portion 16) may be formed with a gentler slope than the slope of the inner cylindrical portion 5 (inner cylindrical portion 15) with respect to the central axis of the air pipe 4, or it may be formed in a flared shape that widens towards the tip.

[0037] With the above configuration, the cross-sectional area of ​​the airflow path between the inner cylindrical sections 5 and 15 and the outer cylindrical sections 6 and 16 increases towards the tip compared to the cross-sectional area of ​​the airflow path passing radially inside the tapered inner cylindrical sections 5 and 15. Therefore, the air from the outer cylindrical sections 6 and 16, which act as an air curtain to prevent scattering to the surroundings, can be slowed down to approach the velocity of the air from the inner cylindrical sections 5 and 15 that deliver the cleaning liquid, and the foam discharged from the cleaning pipe 2 can be appropriately dispersed.

[0038] The inner cylindrical sections 5 and 15 are provided with insertion sections (slits 5a and 15a) that penetrate in the thickness direction, through which the rinsing pipe 3 passes. The rinsing pipe 3 is routed radially from the inside to the outside, passing through slits 5a and 15a from the inside of the inner cylindrical sections 5 and 15. The portion of the rinsing pipe 3 closer to the tip of the slits 5a and 15a is positioned between the inner cylindrical sections 5 and 15 and the outer cylindrical sections 6 and 16.

[0039] To put it another way, "the part of the rinsing pipe 3 that is closer to the tip than slits 5a and 15a" refers to the part of the rinsing pipe 3 that is closer to the tip than the part that intersects with slits 5a and 15a.

[0040] In this explanation, we will use slits 5a and 15a, which are cut out to the distal end, as an example of insertion portions formed in the inner cylindrical portions 5 and 15, but the configuration is not limited to this. For example, the insertion portion may be a through-hole that forms a closed region, such as a round hole or an elongated hole formed in the axial direction of the air pipe 4. If the insertion portion is a through-hole that forms a closed region, the tip of the inner cylindrical portion 5, 15 can be made without chipping all around its circumference. As a result, the cleaning foam discharged from the discharge portion 2g of the cleaning pipe 2 can be surrounded all around, making it easier to stabilize the airflow around the cleaning pipe 2 and further improving the directionality of the discharge of the cleaning foam.

[0041] With the above configuration, the portion of the rinsing pipe 3 closer to the tip than the slits 5a and 15a is positioned between the inner cylindrical portions 5 and 15 and the outer cylindrical portions 6 and 16. Compared to the case where the portion is positioned radially outward from the maximum diameter portion of the tapered inner cylindrical portions 5 and 15, it is possible to suppress the loss of air flowing between the outer cylindrical portions 6 and 16 and the inner cylindrical portions 5 and 15.

[0042] As shown in Figure 3, the discharge section 3g of the rinsing pipe 3 is positioned to protrude further forward than the air pipe 4 (as described above, the cover 10 is not included in the air pipe 4). With the above configuration, the discharge section 3g of the rinsing pipe 3 protrudes further forward than the air pipe 4, so that the air discharged from the air pipe 4 (tip nozzle 30) spreads radially and hits the water discharged from the discharge section 3g of the rinsing pipe 3. As a result, the water discharged from the discharge section 3g can be discharged over a wide area.

[0043] Mounting sections (mounting cylinder sections 9, 19) to which the cleaning pipe 2 is attached are located inside the inner cylinder sections 5, 15. In this embodiment, the inner diameter of the mounting cylinder portion 9 of the base nozzle 20 is approximately 5 mm smaller than the inner diameter of the mounting cylinder portion 19 of the tip nozzle 30, and a step 9a is provided between the mounting cylinder portions 9 and 19, including a seating surface against which the tip portion 2a of the cleaning pipe 2 abuts, as shown in Figure 3.

[0044] In this embodiment, the mounting portion is described as the mounting cylinder portion 9 and 10, but it does not necessarily have to be cylindrical. For example, it may be a projection (not shown) that protrudes from the inner cylinder portion 5 toward the central axis and has a groove that fits into the cleaning pipe 2. With the above configuration, the cleaning pipe 2 can be fixed inside the inner cylindrical parts 5 and 15 by the mounting part, and the positional relationship with the air flowing inside the inner cylindrical parts 5 and 15 can be stabilized.

[0045] <Holder> Next, the holder 40 will be described, mainly with reference to Figure 12, in addition to Figures 1 to 3. Figure 12 is a perspective view of the holder 40. The holder 40 is for fixing the air piping 4 in a fixed position to a trolley or the like (not shown). The holder 40 mainly consists of an angle 41 having an L-shaped cross-section, two side plates 42 attached to the inside of the angle 41 at intervals, and a component 43 that is guided by the side plates 42 and attached to the angle 41.

[0046] The angle bracket 41 is formed by bending a single sheet of metal. Eight mounting holes 41a are formed in the bottom plate of the angle bracket 41, arranged in a circular pattern and penetrating through the thickness direction. Four mounting holes 41e are formed in the thickness direction, extending outward in the width direction from the side plate 42 of the vertical plate of the angle 41, and are used to attach the assembly member 43 (described later) with bolts and nuts (not shown).

[0047] The side plate 42 is joined to the top surface of the bottom plate and the back surface of the vertical plate of the angle 41, and has a shape that combines a long rectangle in the front-to-back direction and a trapezoid integrally formed on the top of the rectangle. The portion of the rectangle opposite the bent part of the angle 41 is cut out.

[0048] The assembly member 43 has an edge plate 43a, a side plate 43b, and a base end side plate 43c, and is formed as a whole in a π shape in plan view. Four mounting holes 43e are formed in the edge plate 43a, opposite the mounting holes 41e of the angle 41, and are attached by bolts and nuts (not shown), passing through in the thickness direction. A through hole 43d is formed on the underside of the base plate 43c, penetrating in the thickness direction, and the lower elbow 4b of the air pipe 4 is passed through this through hole 43d and fixed in place.

[0049] The cleaning apparatus 1 according to this embodiment is illustrative as described above, and various modifications are possible within the scope of the common technical concept. Furthermore, the cleaning device 1 may also be equipped with a proximity sensor (not shown). By equipping the cleaning device 1 with a proximity sensor in this way, it is possible to spray cleaning foam or water over a wide area while maintaining a constant distance from the outer surface of the train, which is the target of the discharge of cleaning foam or water.

[0050] This embodiment encompasses the following technical concepts. (1) A cleaning device used to clean the exterior of a train, A cleaning pipe that discharges cleaning solution, It is equipped with an air piping for discharging air, The tip of the air pipe comprises an inner cylindrical portion and an outer cylindrical portion arranged around the outside of the inner cylindrical portion, and is configured so that the air passes through both the inner cylindrical portion and the outer cylindrical portion. The inner cylindrical portion and the outer cylindrical portion each extend in the direction of the central axis of the air piping, The cleaning pipe is arranged radially inward of the inner cylindrical portion. A cleaning device characterized by the following features. (2) The cleaning device according to (1), wherein the inner cylindrical portion and the outer cylindrical portion are connected by a plurality of radially extending partition walls. (3) The cleaning device according to (1) or (2), wherein the inner cylindrical portion is tapered, becoming narrower towards the tip. (4) The cleaning device according to (3), wherein the outer cylindrical portion is formed with respect to the central axis of the air piping at a gentler incline than the incline of the inner cylindrical portion, is formed in a straight tubular shape, or is formed in a flared shape that widens towards the tip. (5) The rinsing piping further includes a discharge section for discharging rinsing liquid, The washing device according to any one of (1) to (4), wherein the discharge portion of the rinsing pipe is disposed between the inner cylindrical portion and the outer cylindrical portion when the discharge portion is viewed from the front. (6) The rinsing piping further includes a discharge section for discharging rinsing liquid, The inner cylindrical portion is provided with a through-hole that penetrates in the thickness direction and through which the rinsing pipe passes. The washing device according to (3) or (4), wherein the rinsing pipe is passed from the inside to the outside in the radial direction, through the insertion portion from the inside of the inner cylindrical portion, and the portion of the rinsing pipe closer to the tip of the insertion portion is disposed between the inner cylindrical portion and the outer cylindrical portion. (7) The washing device according to (5) or (6), wherein the discharge portion of the rinsing pipe is arranged to protrude further forward than the air pipe. (8) The air piping further comprises a cover attached to the outer circumference of the tip portion, The cleaning device according to (7), wherein the cover is positioned to protrude toward the tip of the air piping and is positioned flush with the rinsing piping or to protrude toward the tip. (9) The cleaning device according to any one of (1) to (8), wherein a mounting portion for attaching the cleaning pipe is provided inside the inner cylindrical portion. [Explanation of Symbols]

[0051] 1. Washing device 2. Cleaning pipes 2a Tip 2b Elbow 2c nipple 2D foam nozzle 2e socket 2f socket 2g discharge part 3. Rinsing pipes 3a Pipe 3b Joint Unit 3c Bend part 3g discharge part 4. Air piping 4a Tip 4b Lower elbow 4c Upper elbow 4g discharge part 5 Inner cylinder part 5a Slit (insertion part) 6 Outer cylinder part 7 Inner bulkhead 8 Outer bulkhead (bulkhead) 9. Mounting cylinder section 9a Step 9b Grooved protrusion 9c Straight section 9d flare section 10 Covers 15 Inner cylinder part 15a Slit (insertion part) 16 Outer cylinder part 17 Inner bulkhead 18 Outer bulkhead (bulkhead) 19 Mounting cylinder section 20 Proximal end nozzle 30 Nozzle at the tip 40 holders 41 Angle 41a, 41e Mounting holes 42 Side panels 43 Assembled material 43a Edge board 43b side plate 43c Proximal side plate 43d Through hole 43e Mounting hole

Claims

1. A cleaning device used to clean the exterior of a train, A cleaning pipe that discharges cleaning solution, It is equipped with an air piping for discharging air, The tip of the air pipe comprises an inner cylindrical portion and an outer cylindrical portion arranged around the outside of the inner cylindrical portion, and is configured so that the air passes through both the inner cylindrical portion and the outer cylindrical portion. The inner cylindrical portion and the outer cylindrical portion each extend in the direction of the central axis of the air piping, The cleaning pipe is arranged radially inward of the inner cylindrical portion. The rinsing piping further includes a discharge section for discharging rinsing liquid, A cleaning device characterized in that the discharge portion of the rinsing pipe is disposed between the inner cylindrical portion and the outer cylindrical portion when the discharge portion is viewed from the front.

2. A cleaning device used for cleaning the exterior surface of a train, A cleaning pipe that discharges cleaning solution, It is equipped with an air piping for discharging air, The tip of the air pipe comprises an inner cylindrical portion and an outer cylindrical portion arranged around the outside of the inner cylindrical portion, and is configured so that the air passes through both the inner cylindrical portion and the outer cylindrical portion. The inner cylindrical portion and the outer cylindrical portion each extend in the direction of the central axis of the air piping, The cleaning pipe is arranged radially inward of the inner cylindrical portion. The inner cylindrical portion is formed in a tapered shape, becoming narrower towards the tip. The rinsing piping further includes a discharge section for discharging rinsing liquid, The inner cylindrical portion is provided with a through-hole that penetrates in the thickness direction and through which the rinsing pipe passes. The rinsing pipe is provided from the inside to the outside in the radial direction, passing through the insertion portion from the inside of the inner cylindrical portion, and the portion of the rinsing pipe closer to the tip of the insertion portion is disposed between the inner cylindrical portion and the outer cylindrical portion.

3. The cleaning device according to claim 1 or 2, wherein the inner cylindrical portion and the outer cylindrical portion are connected by a plurality of radially extending partition walls.

4. The cleaning device according to claim 1, wherein the inner cylindrical portion is formed in a tapered shape that narrows towards the tip.

5. The cleaning device according to claim 2 or 4, wherein the outer cylindrical portion is formed with respect to the central axis of the air piping at a gentler incline than the incline of the inner cylindrical portion, formed in a straight tubular shape, or formed in a flared shape that widens towards the tip.

6. The cleaning device according to any one of claims 1 to 5, wherein the discharge portion of the rinsing pipe is arranged to protrude further forward than the air pipe.

7. The air piping further comprises a cover attached to the outer circumference of the tip portion, The cleaning device according to claim 6, wherein the cover is positioned to protrude further forward than the air piping and is positioned flush with the rinsing piping or protruding further forward.

8. The cleaning device according to any one of claims 1 to 7, wherein a mounting portion for attaching the cleaning pipe is provided inside the inner cylindrical portion.

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