Washing device

Abstract

To provide a cleaning apparatus which can be compactly configured and can efficiently clean a bed of a dump truck.SOLUTION: A cleaning apparatus comprises: a parking lot 100 where a dump truck 700 parks; and a first bed drainage machine 310 for jetting cleaning water CL toward a floor part 711 of a bed 710 and a second bed drainage machine 350 for jetting the cleaning wager CL toward an inside face 721 of a rear door 720 of the bed 710, which are provided at a base 170 at the rear of the parking lot 100. The first bed drainage machine 310 comprises: a vertical tilt mechanism 320 for spraying the cleaning water CL toward the bed 710 tilted in the rear, and vertically tilting a cleaning water CL spray direction; and a longitudinal tilt mechanism 330 for longitudinally tilting the same.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The technical field of the cleaning device described in this specification relates to a cleaning device that sprays cleaning water onto the loading platform of a dump truck to clean the loading platform.

Background Art

[0002] As a car washer for cleaning the loading platform of a vehicle, Patent Document 1 below describes a car washer including a base movable in the front-rear direction of the vehicle and a nozzle supported by the base for spraying liquid toward the loading platform.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The conventional car washer described in Patent Document 1 cleans the loading platform from above while moving the car washer body back and forth along the dump truck with the loading platform tilted so that the dump truck entering the washing position lifts the front part of the loading platform. To clean the loading platform from above, the car washer body includes a very tall (e.g., nearly 10 m tall) gantry cart, and sprays cleaning water from the nozzles provided on the gantry cart toward the tilted loading platform, and cleans while moving the gantry cart back and forth. To move the gantry cart of the car washer body back and forth, it is necessary to install a very large support frame at the washing position, resulting in a very large size of the car washer body. Therefore, the conventional cleaning machine has the problem of inevitably becoming large-sized as equipment.

[0005] In addition, for this type of dump truck, since the rear door is opened and closed to discharge the load on the loading platform, dirt easily accumulates on the inner surface of the rear door, and it is necessary to clean the inner surface of the rear door well. However, with the conventional car washer, it is difficult to clean the inner surface of the rear door, and there is also the problem that dirt easily remains.

[0006] The present invention has been made in view of the above points, and aims to provide a cleaning device that can be compactly configured and can efficiently clean the bed of a dump truck. [Means for solving the problem]

[0007] A cleaning device according to the embodiments of this specification is a cleaning device for cleaning the cargo bed of a dump truck, which tilts the cargo bed backward to allow the cargo to slide off, A first cargo bed water sprayer is installed behind the parking area where the dump truck is parked, which sprays cleaning water towards the cargo bed, which is sloped downwards at the rear. The first cargo bed water cannon is characterized by comprising an up-and-down tilting mechanism that tilts the spray nozzle up and down, and a left-and-right tilting mechanism that tilts the spray nozzle left and right, so as to change the direction in which the spray nozzle sprays the cleaning water.

[0008] According to the cleaning device of this embodiment, the first cargo bed water sprayer sprays cleaning water toward the inclined cargo bed, and the direction from which the cleaning water is sprayed is tilted in the up-down and left-right directions by an up-down tilting mechanism and a left-right tilting mechanism while cleaning. As a result, the first cargo bed water sprayer sprays cleaning water while swinging the spray nozzle up-down and left-right, cleaning the inner surface of the cargo bed. The cleaning device of this embodiment does not use the conventional gantry-type car wash machine body, and the first cargo bed water sprayer is installed at the rear of the cleaning device, so it can be made compact and can thoroughly clean the cargo bed.

[0009] Here, in the above-described cleaning device, the first cargo bed water sprayer may be configured to include a first injection nozzle and a second injection nozzle as the injection nozzles, and the first injection nozzle and the second injection nozzle may be inclined relative to each other so as to have an opening angle in the vertical direction.

[0010] According to this, the vertical width from which the cleaning water is ejected can be widened, making it possible to reduce the vertical tilting angle of the vertical tilting mechanism.

[0011] Furthermore, in the above-mentioned cleaning device, the first cargo bed water sprayer is extended upward by an extension rod, and an upper spray nozzle and a lower spray nozzle are provided on the upper side of the extension rod as the spray nozzles. The upper and lower spray nozzles can be configured to spray the cleaning water towards the upper and lower parts of the cargo bed, respectively.

[0012] According to this, the first cargo bed water cannon can be extended upward by an extension rod, allowing it to approach the cargo bed, and the spray nozzles that eject the cleaning water from the first cargo bed water cannon are divided into those facing upward and those facing downward, so that the cargo bed can be cleaned effectively.

[0013] Furthermore, in the above-mentioned cleaning device, a group of annular nozzles is provided on the upper side of the extension rod, with each side of the substantially rectangular shape having a pipe through which cleaning water flows. The annular nozzle group can be configured such that the upper injection nozzle is provided on the upper side of the annular nozzle group, and the lower injection nozzle is provided on the lower side of the annular nozzle group.

[0014] According to this, the upper and lower sides of the cargo bed can be effectively cleaned by the upper and lower spray nozzles of the annular nozzle group provided on the upper side of the extension rod.

[0015] Furthermore, the above-described cleaning device can be configured such that side spray nozzles are provided on both the left and right sides of the annular nozzle group, spraying cleaning water outwards in the left-right direction.

[0016] According to this, the sides of the cargo bed can be effectively cleaned by the side spray nozzles provided on both the left and right sides of the annular nozzle group.

[0017] Furthermore, the above-mentioned cleaning device is provided with a second cargo bed water sprayer that sprays cleaning water toward the inner surface of the rear door of the cargo bed. The second loading platform water drainer includes a plurality of rear surface injection nozzles that eject washing water toward the inner surface of the rear door in the left-right direction above the front upper part of the rear door in the open state. The structure can be configured such that the rear surface injection nozzles can be tilted backward.

[0018] According to this, since the rear surface injection nozzles that eject washing water toward the inner surface of the rear door can be tilted backward, the inner surface of the rear door can be efficiently washed.

Advantages of the Invention

[0019] According to the cleaning device of the embodiment, the structure can be configured to be compact, and the loading platform can be cleaned without any gaps.

Brief Description of the Drawings

[0020] [Figure 1] It is a front view of the cleaning device of the first embodiment. [Figure 2] It is a plan view of the same cleaning device. [Figure 3] It is a left side view of the same cleaning device. [Figure 4] It is a left side view of the same cleaning device and a dump truck parked in a parking lot with its loading platform tilted downward at the rear. [Figure 5] It is a plan view of the same cleaning device and a dump truck parked in a parking lot. [Figure 6] It is a block diagram of the control unit of the cleaning device of the embodiment. [Figure 7] It is a front view of the cleaning device of the second embodiment. [Figure 8] It is a plan view of the same cleaning device. [Figure 9] It is a left side view of the same cleaning device. [Figure 10] It is a plan view of the same cleaning device and a dump truck parked in a parking lot. [Figure 11] It is a left side view of the same cleaning device and a dump truck parked in a parking lot with its loading platform tilted downward at the rear.

Modes for Carrying Out the Invention

[0021] (First Embodiment) A first embodiment of the cleaning apparatus of the present invention will be described below with reference to Figures 1 to 6. Note that the scope of the present invention is not limited to the scope disclosed in the embodiments. As shown in Figures 4 and 5, the cleaning apparatus according to the first embodiment comprises a parking area 100 where a dump truck 700 is parked, a first cargo bed water dispenser 310 provided on a base 170 at the rear of the parking area 100 and spraying cleaning water CL toward the floor 711 of the cargo bed 710, and a second cargo bed water dispenser 350 spraying cleaning water CL toward the inner surface 721 of the rear door 720 of the cargo bed 710.

[0022] The first cargo bed water cannon 310 sprays cleaning water CL toward the cargo bed 710, which is tilted downwards at the rear (upwards at the front), and includes an up-down tilting mechanism 320 that tilts the direction in which the cleaning water CL is sprayed in the up-down direction (front-back direction), and a left-right tilting mechanism 330 that tilts in the left-right direction. In this specification, the orientation of the cleaning device is such that the station 100 side is the front and the base 170 side on which the first cargo bed water cannon 310 and the second cargo bed water cannon 350 are installed is the rear. Up, down, left, and right refer to the up, down, left, and right directions when the cleaning device is viewed from the front, and in the illustrations, F is front, B is rear, U is up, D is down, L is left, and R is right.

[0023] The first cargo bed water cannon 310 is installed on the base 170 and, as shown in Figures 4 and 5, is a water cannon that sprays cleaning water CL towards the inside of the floor 711 and side walls 712 of the cargo bed 710, which is tilted downwards at the rear (upwards at the front). As shown in Figures 3 and 4, the first cargo bed water cannon 310 is equipped with a first spray nozzle 311 and a second spray nozzle 312 for spraying cleaning water CL. The first spray nozzle 311 and the second spray nozzle 312 are inclined relative to each other so as to have an opening angle in the vertical direction (front-back direction). Specifically, the spray direction of the second spray nozzle 312 is set on the extension of the axis of the cylindrical first cargo bed water cannon 310, and the spray direction of the first spray nozzle 311 is set to be inclined upwards from the spray direction of the second spray nozzle 312 at an opening angle of 45° (preferably 30~90°). The first injection nozzle 311 and the second injection nozzle 312 are inclined relative to each other so that they have an opening angle in the vertical direction. As a result, the vertical width of the first cargo bed water cannon 310 from which the washing water CL is sprayed is widened, which reduces the vertical tilting angle (vertical tilting angle α1) of the vertical tilting mechanism 320 (described later), thereby reducing the load on the vertical tilting mechanism 320.

[0024] As shown in Figures 3 and 4, the first cargo bed water cannon 310 can be tilted up and down by the up and down tilting mechanism 320 at an angle of swing of up and down tilting angle α1, and as shown in Figures 2 and 5, it can be tilted left and right by the left and right tilting mechanism 330 at an angle of swing of left and right tilting angle β1. The first cargo bed water cannon 310 sprays cleaning water CL towards the floor 711 of the tilted cargo bed 710, and cleans while tilting the direction from which the cleaning water CL is sprayed in the up and down and left and right directions by the up and down tilting mechanism 320 and the left and right tilting mechanism 330. The first cargo bed water cannon 310 sprays cleaning water CL while swinging the first spray nozzle 311 and the second spray nozzle 312 up and down and left and right, cleaning the floor 711 of the cargo bed 710 and the inside of the side walls 712, excluding the inner surface 721 of the rear door 720.

[0025] As shown in Figure 3, the vertical tilting mechanism 320 rotates a horizontal pivot shaft 322 by a motor 321, tilting the first cargo bed water cannon 310 up and down at an angle of vertical tilt α1. As shown in Figures 1 and 2, the left-right tilting mechanism 330 rotates a vertical pivot shaft 332 by a motor 331, tilting the first cargo bed water cannon 310 left and right at an angle of left-right tilt β1. The vertical tilt angle α1 and the left-right tilt angle β1 are set according to the type of dump truck 700 (according to the size of the cargo bed 710).

[0026] The second cargo bed water cannon 350 is installed on the base 170 and, as shown in Figure 4, is a water cannon that sprays cleaning water CL from the cargo bed 710, which is tilted downwards at the rear, toward the inner surface 721 of the open rear door 720. As shown in Figures 1 and 2, the second cargo bed water cannon 350 is positioned in front of the open rear door 720 from the cargo bed 710, and six rear spray nozzles 352 that spray cleaning water CL toward the inner surface 721 of the rear door 720 are provided at equal intervals across the left and right width of the rear door 720. The rear spray nozzles 352 are provided so that the nozzles can be tilted backward, and they spray cleaning water CL from above toward the inner surface 721 of the rear door 720, which is located below. Because the rear spray nozzles 352 are configured to be tiltable backward, the inner surface 721 of the rear door 720 can be cleaned more accurately. Since the second cargo bed water cannon 350 cleans the inner surface 721 of the rear door 720, the cleaning device of the first embodiment can thoroughly clean the entire inside of the floor 711 and side walls 712 of the cargo bed 710 with the first cargo bed water cannon 310 and the second cargo bed water cannon 350.

[0027] The first cargo bed water cannon 310 and the second cargo bed water cannon 350 are installed on the base 170 and are designed not to move from the base 170. For this reason, the cleaning device of this embodiment is compact and is centered around the base 170.

[0028] As shown in Figures 4 and 5, the washing device includes a base 170 on which a first cargo bed water cannon 310 and a second cargo bed water cannon 350 are installed, and a parking area 100 in front of this base where a dump truck 700 whose cargo bed 710 is to be washed is provided. As shown in Figure 5, the parking area 100 is equipped with lane markings and guide lights 113 to guide the dump truck 700 so that it can park in the center of the parking area 100 in the left-right direction.

[0029] The parking area is divided into a center line 111 and side lines 112. The center line 111 is positioned in the front-to-back direction along the left-to-right center of the parking area 100. By parking the dump truck 700 with its left-to-right center aligned with the center line 111, the dump truck 700 is guided to the correct position of the washing device. The side lines 112 are positioned in the front-to-back direction on both the left and right sides of the center line 111. By the driver of the dump truck 700 checking the position of the side lines 112 using the side mirrors, the dump truck 700 is guided to the correct position of the washing device. Guide lights 113 are provided behind the side lines 112 to assist in guiding the dump truck 700 to the correct position of the washing device.

[0030] As shown in Figure 4, the parking area 100 is equipped with wheel stops 120, which are movable forward and backward, and the wheel stop control unit 804, described later, adjusts the forward and backward stopping positions according to the differences in the dump truck 700 models. The side line 112 has front wheel stop lines 112a that indicate the stopping position of the front wheels of the dump truck 700 according to the differences in the dump truck 700 models, and these are marked according to the type of dump truck 700.

[0031] As shown in Figures 4 and 5, the station 100 is equipped with a drainage section 210 and a purification section 220 for reusing the washing water CL. The drainage section 210 is a temporary water collection area that collects and discharges wastewater WL generated from the washing water CL sprayed onto the cargo bed 710 of the dump truck 700. The purification section 220 is equipment that purifies the wastewater WL discharged from the drainage section 210 and recycles it into purified water PL that can be used again as washing water CL. The washing water CL that has washed the cargo bed 710 with the washing device absorbs foreign matter such as sand and chemical components attached to the cargo bed 710 and becomes wastewater WL, which is temporarily collected in the drainage section 210. The wastewater WL collected in the drainage section 210 is transferred to the purification section 220 along with the foreign matter.

[0032] The purification unit 220 is a system that separates foreign matter such as sand from wastewater WL and recycles the wastewater WL into purified water PL that can be used as washing water CL. The purification unit 220 consists of a reservoir (pond) (not shown) that stores the wastewater WL transferred from the drainage unit 210 and separates foreign matter such as sand from the wastewater WL by sedimentation, and an oxygen supply device (not shown) that circulates the wastewater WL in the reservoir to increase the oxygen concentration. The purification unit 220 is also equipped with a pH adjustment device that adjusts the pH of the wastewater WL (purified water PL) to suppress the generation of rust in the washing device.

[0033] The water storage tank has a capacity of approximately 5,000 m³ to store the wastewater WL transferred from the drainage section 210 and to allow foreign matter such as sand to settle and separate from the wastewater WL over time. 3 This is the tank. Based on the amount of wastewater WL generated and the time required for foreign matter to settle, the capacity of the storage tank is 100 to 10,000 m³. 3 This can be done. Furthermore, any water storage tank capable of separating foreign matter such as sand from wastewater (WL) by sedimentation can be used. For example, a water channel such as a circulating waterway can also separate foreign matter by sedimentation, and a water channel can be used instead of a water storage tank. The sand separated from the wastewater (WL) and settled in the water storage tank is recovered and reused as aggregate in concrete, mortar, etc.

[0034] The oxygen supply device supplies oxygen to the purified water PL from which foreign matter has been separated from the wastewater WL, and returns the oxygenated purified water PL to the storage tank. The oxygen dissolving device is a device that separates oxygen using the nitrogen and oxygen adsorption properties of an adsorbent (synthetic zeolite) in a PSA oxygen generator, or oxygen generated from an oxygen generation catalyst or compressed air, and dissolves the oxygen in the purified water PL by bringing it into contact with the purified water PL in a curtain-like or spray-like form. When the oxygen concentration of the wastewater WL (purified water PL) in the storage tank decreases, there is a risk that malodorous substances such as hydrogen sulfide and mercaptans will be generated due to the activity of anaerobic microorganisms. To prevent this, the oxygen supply device increases the oxygen concentration of the wastewater WL (purified water PL).

[0035] The purified water PL, which is purified from wastewater WL in the purification unit 220, is used as the washing water CL for the washing device and is recycled by circulating within the washing device.

[0036] Figure 6 shows the control unit 800 of the washing device. The control unit 800 is configured to control the wheel stop control unit 804, the first pump 805, the second pump 806, the up-and-down tilting mechanism 320, and the left-and-right tilting mechanism 330 based on a pre-created washing process program corresponding to the type of dump truck 700, using operation instruction signals input from the operation unit 802, in order to execute a predetermined washing process. The first pump 805 is a pump that sends washing water CL to the first cargo bed water dispenser 310 at a rate of 9,600 L / h. The second pump 806 is a pump that sends washing water CL to the second cargo bed water dispenser 350 at a rate of 9,600 L / h. The first pump 805 and the second pump 806 can be used with a water supply capacity of 5,000 to 12,000 L / h.

[0037] The control unit 800 is equipped with a communication unit 801, which has means of communication via short-range wireless communication and is configured to send instructions to the control unit 800 according to the information of the dump truck 700 and the cleaning method transmitted from a wireless remote controller used by the driver of the dump truck 700. For example, a mobile phone with Bluetooth can be used as the wireless remote controller. The information of the dump truck 700 is the vehicle type information of the dump truck 700, and the dimensions of the dump truck 700, including the cargo bed 710, can be determined from the vehicle type information of the dump truck 700. From the dimensions of the dump truck 700, the vertical tilt angle α1 and the horizontal tilt angle β1 of the first cargo bed water cannon 310, and the front-to-back position of the wheel stop 120 (Figure 4) are adjusted. The transmitted cleaning method specifies the strength of the cleaning depending on the degree of soiling of the cargo bed 710.

[0038] Next, a method for cleaning the cargo bed 710 of a dump truck 700 using the cleaning device of the first embodiment will be described. The cargo on the cargo bed 710 of the dump truck 700 is mainly soil and sand, and the cleaning method will be described as transmitting information about the dump truck 700 and the cleaning method, moving the dump truck 700 to the parking area 100, cleaning the cargo bed 710 of the dump truck 700 with the cleaning device, and circulating the cleaning water CL. In the initial state, the first cargo bed water cannon 310 faces downwards in the vertical direction and forwards in the horizontal direction, as shown by the solid line in Figure 3. This is to discharge the water inside the first cargo bed water cannon 310 downwards and prevent freezing inside the first cargo bed water cannon 310 in winter.

[0039] The dump truck 700's information and cleaning method are transmitted to the cleaning device's communication unit 801 (Figure 6) via communication means. Based on the information and cleaning method of the dump truck 700 sent to the cleaning device's communication unit 801, the cleaning device's control unit 800 controls the wheel stop control unit 804, the first pump 805, the second pump 806, the vertical tilting mechanism 320, and the horizontal tilting mechanism 330, as shown in Figure 6. Specifically, the wheel stop control unit 804 adjusts the position of the wheel stop 120 (Figure 4) in the longitudinal direction to adjust the stopping position of the dump truck 700 in the longitudinal direction according to the size of the cargo bed 710. The vertical tilting mechanism 320 adjusts the vertical tilting angle α1 of the first cargo bed water cannon 310 according to the size of the cargo bed 710. The horizontal tilting mechanism 330 adjusts the horizontal tilting angle β1 of the first cargo bed water cannon 310 according to the size of the cargo bed 710.

[0040] To move the dump truck 700 to the parking area 100, the driver moves the dump truck 700 in reverse from the front of the washing equipment. At this time, the driver of the dump truck 700 is guided to the correct position of the washing equipment by checking the position of the side lines 112 located in the front-rear direction on both sides of the center line 111, which is positioned along the center of the parking area 100 in the left-right direction, and the rear guide lights 113 on the side lines 112. The dump truck 700 is guided to the correct position in the front-rear direction of the parking area 100 by the wheel stops 120 and the front wheel stop lines 112a attached to the side lines 112.

[0041] The cleaning of the cargo bed 710 of the dump truck 700 by the cleaning device involves the first cargo bed water cannon 310 repeatedly and alternately cleaning the upper and lower parts of the floor 711 of the cargo bed 710, while simultaneously the second cargo bed water cannon 350 cleans the inner surface 721 of the rear door 720.

[0042] The cleaning of the upper part of the floor 711 of the cargo bed 710 is initiated when the control unit 800 controls the vertical tilting mechanism 320 to tilt the first cargo bed water cannon 310 from the downward direction shown by the solid line in Figure 3 (Figure 4) to the upward direction shown by the dashed line, and the control unit 800 starts the first pump 805 (Figure 6) that supplies water to the first cargo bed water cannon 310. Subsequently, the control unit 800 controls the left-right tilting mechanism 330 to tilt the first cargo bed water cannon 310 multiple times to the left and right at a left-right tilting angle β1 as shown in Figure 5, cleaning the upper part of the floor 711 of the cargo bed 710.

[0043] The cleaning of the underside of the floor 711 of the cargo bed 710 is initiated by the control unit 800 controlling the vertical tilting mechanism 320 to tilt the first cargo bed water cannon 310 from the upward direction shown by the dashed line in Figure 3 (Figure 4) to the downward direction shown by the solid line. The first pump 805 remains running. Subsequently, the control unit 800 controls the left-right tilting mechanism 330 to tilt the first cargo bed water cannon 310 multiple times to the left and right at a left-right tilting angle β1 as shown in Figure 5, cleaning the underside of the floor 711 of the cargo bed 710. The cleaning of the inner surface 721 of the rear door 720 by the second cargo bed water cannon 350 is initiated by the control unit 800 activating the second pump 806 (Figure 6) that supplies water to the second cargo bed water cannon 350. During cleaning, the notification unit 130 notifies that the cleaning device is cleaning.

[0044] The washing water CL used in the washing process is recycled and reused. The washing water CL used to wash the cargo bed 710 in the washing device absorbs dirt such as sand and chemical components attached to the cargo bed 710 and becomes wastewater WL, which is temporarily collected in the drainage section 210. The wastewater WL collected in the drainage section 210 is transferred to the purification section 220 along with the dirt, where foreign matter such as sand is separated by sedimentation, the pH is adjusted with a pH adjuster to suppress the occurrence of rust in the piping, and the purified water PL is recycled into washwater CL that can be used as washing water CL and reused as washing water CL in the washing device.

[0045] Towards the end of the cleaning process, the cleaning water CL is replaced with tap water (or well water) instead of recycled purified water PL. This is to ensure that the cleaning is completed using tap water that does not contain chemicals such as pH adjusters.

[0046] The cleaning process is completed when the control unit 800 stops the first pump 805 and the second pump 806, and the control unit 800 controls the vertical tilting mechanism 320 and the horizontal tilting mechanism 330 to tilt the first cargo bed water cannon 310 downward and forward in the left and right directions, as shown by the solid line in Figure 3 (Figure 4). This discharges the water from the first cargo bed water cannon 310 downward, preventing freezing inside the first cargo bed water cannon 310 during winter.

[0047] According to the cleaning device of the first embodiment, the first cargo bed water dispenser 310 sprays cleaning water CL toward the floor 711 of the inclined cargo bed 710, and cleans while tilting the direction from which the cleaning water CL is sprayed in the up-down and left-right directions by the up-down tilting mechanism 320 and the left-right tilting mechanism 330. At the same time, the second cargo bed water dispenser 350 sprays cleaning water CL toward the inner surface 721 of the rear door 720, cleaning the inner surface 721 of the rear door 720 of the cargo bed 710. As a result, the first cargo bed water dispenser 310 sprays cleaning water CL while swinging its spray nozzle up-down and left-right, cleaning the floor 711 of the cargo bed 710 and the inside of the side wall 712, excluding the inner surface 721 of the rear door 720. The second cargo bed water cannon 350 sprays cleaning water toward the inner surface 721 of the rear door 720 of the cargo bed 710, and the cleaning device can clean the entire inside of the side wall 712, including the floor 711 of the cargo bed 710 and the inner surface 721 of the rear door 720.

[0048] The cleaning device of the first embodiment does not use the conventional gantry-type car wash machine body, and has a structure in which the first cargo bed water dispenser 310 and the second cargo bed water dispenser 350 are installed at the rear of the cleaning device, so it can be made compact and can thoroughly clean the entire inside of the side wall 712, including the floor 711 of the cargo bed 710 and the inner surface 721 of the rear door 720.

[0049] (Second Embodiment) Next, a second embodiment of the cleaning apparatus of the present invention will be described with reference to Figures 7 to 11. In the cleaning apparatus of the second embodiment, a dump truck 700A, in which the cargo bed 710A is covered with a canopy 730 having an opening 732, will be used as an example of the dump truck to be cleaned. In the second embodiment, elements common to the first embodiment will be given the same reference numerals and their descriptions will be omitted.

[0050] As shown in Figures 8 to 11, the first cargo bed water cannon 310A of the second embodiment of the cleaning device is extended upward (towards the front) by an extension rod 317, and is configured so that a spray nozzle can enter the cargo bed 710A through an opening 732 in the cargo bed 710A during cleaning. The spray nozzle of the first cargo bed water cannon 310A is configured with a front annular nozzle group 317a on the upper (front) side of the extension rod 317, and a rear annular nozzle group 317b on the lower (rear) side of the front annular nozzle group 317a. The front annular nozzle group 317a and the rear annular nozzle group 317b are each configured so that cleaning water CL flows inside an annular pipe.

[0051] The front annular nozzle group 317a, when the extension rod 317 is arranged horizontally, has a roughly rectangular shape with sides in the front, back, left, and right directions, as shown in Figure 8. Each side is connected to a pipe through which cleaning water CL flows, and the connected annular pipes are equipped with injection nozzles from which the cleaning water CL is ejected. The front annular nozzle group 317a is equipped with five first upper injection nozzles 313 arranged on the left and right sides of the front side, ten first lower injection nozzles 318 arranged on the left and right sides of the rear side, and twelve first side injection nozzles 315a arranged in the front and back directions on each side.

[0052] As shown in Figure 9, the first upper spray nozzle 313 is a cylindrical nozzle with a length of 200 mm and an inner diameter of 13 mm, and is connected by a flexible joint 313a to an annular pipe that forms the front side of the front annular nozzle group 317a so that the spray direction can be adjusted. Five of the first upper spray nozzles 313 are arranged in a row on the left and right sides of the front side of the front annular nozzle group 317a, which has a roughly rectangular outer shape, and as shown in Figure 11, they are nozzles that mainly clean the front side wall 712A of the cargo bed 710A and the inner surface 731 of the roof 730 of the dump truck 700A.

[0053] As shown in Figure 8, the first lower spray nozzle 318 is a hole with an inner diameter of 5 mm, located on the underside of the annular pipe that forms the rear side of the front annular nozzle group 317a, and serves as a nozzle from which cleaning water CL is ejected. Ten of the first lower spray nozzles 318 are arranged in a row on the underside of the annular pipe that forms the rear side of the front annular nozzle group 317a, and as shown in Figure 11, they are nozzles that mainly clean the floor portion 711A of the cargo bed 710A of the dump truck 700A.

[0054] As shown in Figure 9, the first side spray nozzles 315a are holes with an inner diameter of 5 mm, each positioned outward in the left-right direction on the annular pipes that form the left and right sides of the front annular nozzle group 317a, and serve as nozzles from which cleaning water CL is ejected. Twelve first side spray nozzles 315a are arranged in a row, each positioned outward in the left-right direction on the annular pipes that form the left and right sides of the front annular nozzle group 317a, and as shown in Figure 10, they are nozzles that mainly clean the side walls 712A of the cargo bed 710A of the dump truck 700A.

[0055] The rear annular nozzle group 317b is positioned behind the front annular nozzle group 317a, has a roughly rectangular shape, and each side is provided with a pipe through which cleaning water CL flows, and nozzles from which cleaning water CL is ejected are provided in the connected annular pipes. When the extension rod 317 is positioned horizontally, as shown in Figure 9, the rear annular nozzle group 317b is positioned below the extension rod 317 by the lower extension rod 317c, and is positioned inclined upward from the rear to the front. The rear annular nozzle group 317b has a roughly rectangular shape with sides in the front, back, left, and right directions on a plane that is inclined upward from the rear to the front.

[0056] As shown in Figure 8, the rear annular nozzle group 317b is provided with second upper injection nozzles 316 at both the left and right ends of the front edge, and ten second lower injection nozzles 319 arranged horizontally on the lower side. Three rearward injection nozzles 314 are provided on the rear edge, arranged horizontally. Twenty second side injection nozzles 315b are provided on each of the left and right sides, arranged horizontally (up and down).

[0057] As shown in Figures 7 to 9, the second upper spray nozzle 316 has an elongated slit shape (2 mm x 40 mm) and is configured to spray cleaning water CL in a long, narrow shape along the slit. The second upper spray nozzle 316 is connected by a flexible joint 316a to an annular pipe that forms the front side of the rear annular nozzle group 317b, and is configured to allow adjustment of the spray direction and to allow rotation of the elongated slit shape with respect to the central axis of the spray direction. The second upper spray nozzles 316 are provided at both the left and right ends of the front side of the rear annular nozzle group 317b, which has a roughly rectangular outer shape, and as shown in Figure 11, they are nozzles that mainly clean the front side wall 712A of the cargo bed 710A and the inner surface 731 of the roof 730 of the dump truck 700A.

[0058] As shown in Figure 8, the second lower injection nozzle 319 is a hole with an inner diameter of 5 mm, located on the underside of the annular pipe that forms the front edge of the rear annular nozzle group 317b, and serves as a nozzle from which cleaning water CL is ejected. Ten of the second lower injection nozzles 319 are arranged in a row on the underside of the annular pipe that forms the front edge of the rear annular nozzle group 317b, and as shown in Figure 11, they are nozzles that mainly clean the floor portion 711A of the cargo bed 710A of the dump truck 700A.

[0059] As shown in Figures 7 to 9, the rear spray nozzle 314 has an elongated slit shape (2 mm x 40 mm) and is configured to spray the cleaning water CL in a long, narrow shape along the slit. The rear spray nozzle 314 is connected by a flexible joint 314a to an annular pipe that forms the rear side of the rear annular nozzle group 317b, so that the spray direction can be adjusted and the elongated slit shape can be rotated with respect to the central axis of the spray direction. Three rear spray nozzles 314 are arranged side by side on the left and right sides of the rear side of the rear annular nozzle group 317b, which has a roughly rectangular outer shape, and as shown in Figure 11, they are nozzles that mainly clean the floor 711A of the cargo bed 710A of the dump truck 700A.

[0060] As shown in Figure 9, the second side spray nozzles 315b are holes with an inner diameter of 5 mm, each positioned outward in the left-right direction on the annular pipes that form the left and right sides of the rear annular nozzle group 317b, and serve as nozzles from which cleaning water CL is ejected. Twenty second side spray nozzles 315b are arranged in a row on each side of the annular pipes that form the left and right sides of the rear annular nozzle group 317b, and as shown in Figure 10, they are nozzles that mainly clean the side walls 712A of the cargo bed 710A of the dump truck 700A.

[0061] In the cleaning device of the second embodiment, the length of the extension rod 317 was 360 cm (preferably 300 to 400 cm), and the length of the lower extension rod 317c was 50 cm (preferably 30 to 70 cm). In addition, the length of each side of the front annular nozzle group 317a and the rear annular nozzle group 317b, which have a roughly rectangular outer shape, was 50 cm (preferably 30 to 70 cm).

[0062] The first cargo bed water cannon 310A is extended by an extension rod 317 so that the front annular nozzle group 317a at its tip and the rear annular nozzle group 317b located behind it can enter the cargo bed 710A of the dump truck 700A through the opening 732 of the cargo bed 710A.

[0063] The cleaning water CL flows from the first pump 805 through the extension rod 317 into the annular pipe of the front annular nozzle group 317a, and then through the lower extension rod 317c into the annular pipe of the rear annular nozzle group 317b, and is ejected from each nozzle toward the cargo bed 710A of the dump truck 700A.

[0064] As shown in Figure 9, the first cargo bed water cannon 310A can be tilted up and down (forward and backward) by the vertical tilting mechanism 320 with a swing angle of vertical tilting angle α2, and as shown in Figures 8 and 10, it can be tilted left and right by the left and right tilting mechanism 330 with a swing angle of left and right tilting angle β2. The first cargo bed water cannon 310A sprays cleaning water CL towards the tilted cargo bed 710A, and cleans while tilting the direction from which the cleaning water CL is sprayed in the vertical tilting mechanism 320 and the left and right tilting mechanism 330 in the vertical and left and right directions. The first cargo bed water cannon 310A sprays cleaning water CL while swinging the front annular nozzle group 317a and the rear annular nozzle group 317b up and down and left and right, cleaning the floor 711A of the cargo bed 710A, the inner surface 731 of the canopy 730, and the inside of the side wall 712A, excluding the inner surface 721A of the rear door 720A.

[0065] As shown in Figure 8, a safety device 340 is installed at the tip of the first cargo bed water cannon 310A (the front end of the extension rod 317) to stop the tilting of the first cargo bed water cannon 310A and the spraying of cleaning water CL in the event of contact with the cargo bed 710A of the dump truck 700A or with workers. The safety device 340 prevents accidents caused by contact with the cleaning device.

[0066] The second cargo bed water cannon 350A is installed on the base 170A and, as shown in Figure 9, is a water cannon that sprays cleaning water CL from the cargo bed 710A, which is tilted downwards at the rear (upwards at the front), toward the inner surface 721A of the open rear door 720A. As shown in Figure 8, the second cargo bed water cannon 350A is positioned above and in front of the open rear door 720A from the cargo bed 710A, and six rear spray nozzles 352A that spray cleaning water CL toward the inner surface 721A of the rear door 720A are provided at equal intervals across the left and right width of the rear door 720A. The rear spray nozzles 352A are provided so that the nozzle openings can be tilted backward, and spray cleaning water CL from above toward the inner surface 721A of the rear door 720A, which is located below. The rear spray nozzle 352A is configured to be tiltable towards the rear, allowing for more precise cleaning of the inner surface 721A of the rear door 720A.

[0067] In the second embodiment of the cleaning device, as shown in Figures 10 and 11, three distance sensors 173 (infrared sensors, ultrasonic sensors, etc.) are mounted on the front side of the base 170A, arranged in a left-right direction. The distance sensors 173 are located on the extensions of the left and right side lines 112 of the station 100, and on the extension of the center line 111.

[0068] A distance sensor 173, located on the extension of the center line 111, measures the distance between the dump truck 700A, which is backing into the parking area 100, and the distance sensor 173 (base 170A). When the dump truck 700A has reached the correct stopping position, an alarm light is activated to provide notification.

[0069] Distance sensors 173, each located on the extension of the left and right side lines 112, measure the distance from the left and right rear ends of the dump truck 700A to the distance sensors 173, respectively. They then use indicator lights to signal any deviations in the dump truck 700A's lateral position from its stopping position or deviations in its entry angle. Specifically, the system is configured to signal that the dump truck has stopped correctly when the difference between the distance from the distance sensor 173 located on the extension of the left side line 112 to the left rear end of the dump truck 700A and the distance from the distance sensor 173 located on the extension of the right side line 112 to the right rear end of the dump truck 700A is within 3%.

[0070] According to the cleaning device of the second embodiment, the first cargo bed water dispenser 310A sprays cleaning water CL toward the inclined cargo bed 710A, and cleans while tilting the direction from which the cleaning water CL is sprayed in the up-down and left-right directions by the up-down tilting mechanism 320 and the left-right tilting mechanism 330. At the same time, the second cargo bed water dispenser 350A sprays cleaning water CL toward the inner surface 721A of the rear door 720A, cleaning the inner surface 721A of the rear door 720A of the cargo bed 710A. As a result, the first cargo bed water dispenser 310A sprays cleaning water CL while swinging its spray nozzle up-down and left-right, cleaning the floor 711A of the cargo bed 710A, the inner surface 731 of the canopy 730, and the inside of the side wall 712A, excluding the inner surface 721A of the rear door 720A. The second cargo bed water sprayer 350A sprays cleaning water toward the inner surface 721A of the rear door 720A of the cargo bed 710A, and the cleaning device can clean the entire inside of the floor 711A and side wall 712A of the cargo bed 710A. The cleaning device of the second embodiment does not use the conventional gantry-type car wash machine body, and has a structure in which the first cargo bed water sprayer 310A and the second cargo bed water sprayer 350A are installed at the rear of the cleaning device, so it can be made compact and can thoroughly clean the entire inside of the floor 711A and side wall 712A of the cargo bed 710A.

[0071] In the second embodiment of the cleaning device, the first cargo bed water cannon 310A is extended upward by an extension rod 317, and above the extension rod 317, there are upper spray nozzles (first upper spray nozzle 313, second upper spray nozzle 316) and lower spray nozzles (first lower spray nozzle 318, second lower spray nozzle 319) as spray nozzles, and the upper and lower spray nozzles spray cleaning water CL towards the upper and lower sides of the cargo bed 710A, respectively. With this configuration, the first cargo bed water cannon 310A can approach the cargo bed 710A by being extended upward by the extension rod 317, and the spray nozzles that eject the cleaning water CL of the first cargo bed water cannon 310A are divided into those directed upward and those directed downward, so the cargo bed 710A can be cleaned effectively.

[0072] Furthermore, the cleaning device according to the second embodiment is provided on the upper side of the extension rod 317, with a group of annular nozzles (front annular nozzle group 317a, rear annular nozzle group 317b) having pipes through which cleaning water flows connected to each side of a roughly rectangular shape, an upper injection nozzle is provided on the upper side of the annular nozzle group, and a lower injection nozzle is provided on the lower side of the annular nozzle group. With this configuration, the upper and lower sides of the cargo bed 710A can be suitably cleaned by the upper and lower injection nozzles of the annular nozzle group provided on the upper side of the extension rod 317. [Explanation of Symbols]

[0073] 100 stops 111 Center Line 112 Sidelines 112a Front wheel stop line 113 Guide light 120 Car stop 130 Hochi Department 170 base 170A base 173 Distance Sensor 210 Drainage section 220 Purification section 310 No. 1 cargo bed water cannon 310A No. 1 cargo bed water cannon 311 First injection nozzle 312 Second injection nozzle 313 First upper injection nozzle 313a Flexible joint 314 Rear-injection nozzle 314a Flexible joint 315 Side spray nozzle 315a First side injection nozzle 315b Second side injection nozzle 316 Second upper injection nozzle 316a Flexible joint 317 Extension rod 317a Front annular nozzle group 317b Rear annular nozzle group 317c Lower extension rod 318 First lower injection nozzle 319 Second lower injection nozzle 320 Vertical tilting mechanism 321 Motor 322 Rotary shaft 330 Left and right tilting mechanism 331 Motor 332 Rotary shafts 340 Safety equipment 350 Second cargo bed water cannon 350A Second cargo bed water cannon 352 Rear spray nozzle 352A Rear spray nozzle 700 Dump Trucks 700A Dump Truck 710 cargo bed 710A Cargo bed 711 Floor 711A Floor 712 Side wall 712A side wall 720 Rear door 720A Rear Door 721 Inner surface 721A inner surface 730 Canopy 731 Inner self 732 Opening 800 Control Unit 801 Communications Department 802 Operation section 804 Bollard Control Unit 805 Pump No. 1 806 Pump No. 2 CL cleaning water PL purified water WL wastewater α1 Vertical tilt angle α2 Vertical tilt angle β1 Left / right tilt angle β2 Left / right tilt angle

Claims

1. A cleaning device for cleaning the cargo bed of a dump truck, which tilts the cargo bed backward to allow the load to slide off, A first cargo bed water sprayer is installed behind the parking area where the dump truck is parked, which sprays cleaning water towards the cargo bed, which is sloped downwards at the rear. The first cargo bed water sprayer is a cleaning device characterized by comprising an up-and-down tilting mechanism that tilts the spray nozzle up and down and a left-and-right tilting mechanism that tilts the spray nozzle left and right so as to change the direction in which the spray nozzle sprays the cleaning water up and down and left and right, and comprising a first spray nozzle and a second spray nozzle as the spray nozzle, the first spray nozzle and the second spray nozzle being inclined toward each other so as to have an opening angle in the up and down direction.

2. The first cargo bed water cannon is extended upward by an extension rod, and an upper spray nozzle and a lower spray nozzle are provided on the upper side of the extension rod as the spray nozzles. The cleaning device according to claim 1, characterized in that the upper spray nozzle and the lower spray nozzle spray the cleaning water toward the upper and lower sides of the cargo bed, respectively.

3. On the upper side of the extension rod, a group of annular nozzles is provided, each of which is roughly rectangular in shape, with pipes through which cleaning water flows connected to the inside. The cleaning device according to claim 2, characterized in that the upper injection nozzle is provided as the injection nozzle on the upper side of the annular nozzle group, and the lower injection nozzle is provided on the lower side of the annular nozzle group.

4. The cleaning device according to claim 3, characterized in that side spray nozzles for spraying cleaning water outward in the left-right direction are provided on both the left and right sides of the annular nozzle group.

5. A second cargo bed water sprayer is installed, which sprays cleaning water toward the inner surface of the rear door of the cargo bed. The second cargo bed water cannon is equipped with multiple rear spray nozzles positioned horizontally above and in front of the open rear door, which spray cleaning water toward the inner surface of the rear door. The cleaning device according to any one of claims 1 to 4, characterized in that the rear spray nozzle is tiltable to the rear.

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