Anti-adhesion agent spraying device for asphalt mixture transport vehicles

Abstract

To provide an adhesion prevention agent spraying device for an asphalt mixture transport vehicle, capable of scattering an adhesion prevention agent in a uniform manner, on a load carrying platform of an asphalt mixture transport vehicle such as a dump truck, even in strong wind and rain time.SOLUTION: An adhesion prevention agent spraying device for an asphalt mixture transport vehicle is configured so that, when spraying an adhesion prevention agent on a load carrying platform C2 from spraying nozzle groups 21a-21b which are provided at an internal side of a gate shaped trunk 20 for covering parts of a floor C3 of a load carrying platform C2 of a vehicle C1 and both side gates C4, C5 by self-traveling of a spraying part 2, a wind-proof / rain-proof part 3 which is continuously provided on the spraying part 2, is moved in linkage with the spraying part 2, and covers parts of the floor C3 of the load carrying platform C2 of the vehicle C1 and both side gates C4, C5, and therefore, a part on the load carrying platform C2 spraying the adhesion prevention agent on the spraying part 2, can be protected from wind and rain for preventing scattering of the adhesion prevention agent.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an anti-adhesion agent spraying device for an asphalt mixture transport vehicle, which sprays an anti-adhesion agent for an asphalt mixture onto the loading platform of an asphalt mixture transport vehicle such as a dump truck. [Background technology]

[0002] When asphalt mixture is transported from the factory to the work site by dump truck, an anti-adhesion agent for the asphalt mixture is sprayed onto the bed. The mainstream method for spraying the asphalt mixture anti-adhesion agent onto the bed is for the dump truck driver to climb onto the bed and manually sprinkle the agent from a container, but manual work takes more time for larger dump trucks, and there is a demand for improvements to the working environment due to the aging of drivers and the increase in female drivers.

[0003] Therefore, conventionally, an asphalt mixture anti-adhesion agent spraying device that automatically sprays an anti-adhesion agent on the bed of a dump truck has been developed (see, for example, Non-Patent Documents 1 and 2). Figure 8 shows a conventional asphalt mixture anti-adhesion agent spraying device, where (a) is a side view and (b) is a rear view.

[0004] As shown in Fig. 8, a conventional anti-adhesion agent spraying device for an asphalt mixture transport vehicle includes a stand 103 surrounding a loading platform 102 of a dump truck 101 inside a building 100, a dolly 104 running on the stand 103, and a plurality of hoses 105 with spray nozzles attached to the dolly 104. With this spraying device, when the size of the vehicle is selected and a spray start button is pressed, the dolly 104 runs on the stand 103, and the anti-adhesion agent is sprayed onto the loading platform 102 of the dump truck 101 from the hoses 105 with spray nozzles in a number corresponding to the size of the vehicle. [Prior art documents] [Non-patent literature]

[0005] [Non-Patent Document 1] “Nippon Doro and others develop automatic spraying device to prevent adhesion of materials to dump trucks / relieve the burden on drivers”, [online], September 17, 2020, Nikkan Kensetsu Kogyo Shimbun Co., Ltd., Nikkan Kensetsu Kogyo Shimbun Online, [Retrieved April 22, 2021], Internet<URL:https: / / www.decn.co.jp / ?p=11607> [Non-Patent Document 2] “[Reducing dump truck cleaning work] Nippon Road Co., Ltd. introduces asphalt mixture adhesion prevention agent sprayer to Osaka, the first in the country”, [online], September 17, 2020, Nikkan Kensetsu Tsushin Shimbunsha Co., Ltd., Kensetsu Tsushin Shimbun DIGITAL, [Retrieved April 22, 2021], Internet<URL:https: / / www.kensetsunews.com / web-kan / 492531> Summary of the Invention [Problem to be solved by the invention]

[0006] The building 100 for the conventional spraying device is provided to prevent the anti-adhesion agent from scattering and soiling the surroundings when the wind is strong, and to prevent the anti-adhesion agent from being diluted or washed away by rain, but the roof of this building 100 needs to be high enough not to interfere with the dumping of the loading platform to discharge excess anti-adhesion agent as shown in Fig. 8(a). However, if such a high roof is installed, there is a large space between the loading platform 102 and the roof, allowing rain to fall in and wind to blow in, which hinders the spraying of the anti-adhesion agent. Another problem is that the construction cost of such a building 100 is high.

[0007] Therefore, the present invention aims to provide an anti-adhesion agent spraying device for an asphalt mixture transport vehicle that can uniformly spread an anti-adhesion agent onto the loading platform of an asphalt mixture transport vehicle such as a dump truck even in strong winds and rain. [Means for solving the problem]

[0008] The anti-adhesion agent spraying device for asphalt mixture transport vehicles of the present invention is an anti-adhesion agent spraying device for asphalt mixture transport vehicles that sprays an anti-adhesion agent for asphalt mixture onto the loading platform of the asphalt mixture transport vehicle, and is equipped with a gate-shaped body covering the floor of the loading platform and part of both side gates of the asphalt mixture transport vehicle, a spray nozzle provided inside the body and spraying the anti-adhesion agent onto the loading platform, a spraying unit that moves independently in the fore-and-aft direction of the asphalt mixture transport vehicle, a wind and rainproof unit connected to the spraying unit and covering the floor of the loading platform and part of both side gates of the asphalt mixture transport vehicle, and a control unit that controls the operation of the spraying unit.

[0009] According to the anti-adhesion agent spraying device for asphalt mixture transport vehicles of the present invention, when the spraying unit moves on its own and sprays an anti-adhesion agent onto the loading platform from a spray nozzle installed inside a gate-shaped body covering the floor of the loading platform and part of both side gates of the asphalt mixture transport vehicle, the wind and rainproof unit connected to the spraying unit moves along with the spraying unit and covers the floor of the loading platform and part of both side gates of the asphalt mixture transport vehicle, thereby protecting the area on the loading platform where the anti-adhesion agent is sprayed by the spraying unit from wind and rain and preventing the anti-adhesion agent from scattering.

[0010] The anti-adhesion agent spraying device for an asphalt mixture transport vehicle of the present invention preferably has a pair of rails arranged side by side at a distance wider than the vehicle width of the asphalt mixture transport vehicle, and the spraying unit self-propels on the rails. With this, when spraying the anti-adhesion agent in the same manner as above, by stopping the asphalt mixture transport vehicle between the pair of rails and having the spraying unit self-propel on the rails, the area on the loading platform where the anti-adhesion agent is sprayed by the spraying unit can be protected from wind and rain, and the anti-adhesion agent can be prevented from scattering.

[0011] It is desirable that the windproof and rainproof part has a fixed end on the side opposite to the side connected to the spray part and has an expandable part that expands and contracts in accordance with the movement of the end on the side connected to the spray part. In this way, when spraying the anti-adhesion agent, the expandable part of the windproof and rainproof part expands to protect the area on the loading platform where the anti-adhesion agent is sprayed at the spray part from wind and rain and prevent the anti-adhesion agent from scattering, and after the anti-adhesion agent is sprayed, the expandable part of the windproof and rainproof part contracts.

[0012] It is desirable that the wind and rain protection section has a closed end on the opposite side to the side connected to the spray section, so that wind and rain do not enter or leave the opposite end to the side connected to the spray section, and the area on the loading platform where the adhesion preventive agent is sprayed by the spray section can be more effectively protected from wind and rain.

[0013] The anti-adhesion agent spraying device for an asphalt mixture transport vehicle of the present invention preferably has sensors for detecting the positions of the torii gate, both side gates and rear gate of the loading platform, the spray nozzle is provided inside the body so as to be movable in the width direction and up and down directions of the asphalt mixture transport vehicle, and the control unit causes the spray unit to self-propel based on the detection results of the sensors and moves the spray nozzle in the width direction and up and down directions to spray the anti-adhesion agent from the spray nozzle. This makes it possible to detect the positions of the torii gate, both side gates and rear gate of the loading platform of the asphalt mixture transport vehicle while self-propelling the spray unit, and move the spray nozzle to an appropriate position to spray the anti-adhesion agent.

[0014] It is preferable that the control unit sprays a preset amount of anti-adhesion agent according to the type of asphalt mixture, thereby making it possible to automatically spray an appropriate amount of anti-adhesion agent according to the type of asphalt mixture.

[0015] The anti-adhesion agent spraying device for an asphalt mixture transport vehicle of the present invention preferably has a plurality of tanks each containing a plurality of types of anti-adhesion agents, and the control unit selects a preset tank from the plurality of tanks according to the type of asphalt mixture to spray the anti-adhesion agent, thereby making it possible to automatically select and spray an appropriate anti-adhesion agent according to the type of asphalt mixture. Effect of the Invention

[0016] (1) This device is equipped with a gate-shaped body covering the floor of the bed of an asphalt mixture transport vehicle and part of both side gates, a spray nozzle mounted inside the body and spraying an anti-adhesion agent onto the bed, a spray unit that moves independently in the fore-and-aft direction of the asphalt mixture transport vehicle, a wind and rain protection unit connected to the spray unit and covering the floor of the bed of the asphalt mixture transport vehicle and part of both side gates, and a control unit that controls the operation of the spray unit. This configuration makes it possible to evenly spread the anti-adhesion agent on the bed of an asphalt mixture transport vehicle such as a dump truck without the anti-adhesion agent scattering even in strong winds and rain, eliminating the need to construct a building and the need for expensive construction costs.

[0017] (2) It has a pair of rails arranged side by side with a gap wider than the width of the asphalt mixture transport vehicle, and the spraying unit is self-propelled on the rails. By stopping the asphalt mixture transport vehicle between the pair of rails and the spraying unit self-propelled on the rails, it is possible to evenly spread the anti-adhesion agent on the loading platform of an asphalt mixture transport vehicle such as a dump truck without the anti-adhesion agent scattering, even in strong winds and rain.

[0018] (3) The wind and rain protection section has a fixed end on the side opposite to the side connected to the spray section, and has an expandable section that expands and contracts in accordance with the movement of the end on the side connected to the spray section. This allows the wind and rain protection section to expand and contract as needed, thereby requiring less installation space and reducing installation costs.

[0019] (4) Since the wind and rainproof section has a closed end on the side opposite to the side connected to the spray section, the area on the loading platform where the anti-adhesion agent is sprayed in the spray section can be more effectively protected from wind and rain.

[0020] (5) The vehicle is equipped with sensors for detecting the position of the gate, side gates and rear gate of the loading platform, and the spray nozzle is mounted inside the body so as to be movable in the width direction and up and down directions of the asphalt mixture transport vehicle. The control unit causes the spray unit to propel itself based on the detection results of the sensors and moves the spray nozzle in the width direction and up and down directions while spraying the anti-adhesion agent from the spray nozzle. This allows the anti-adhesion agent to be sprayed appropriately according to the positions of the gate, side gates and rear gate of the loading platform of the asphalt mixture transport vehicle, eliminating waste of the anti-adhesion agent.

[0021] (6) The control unit sprays a preset amount of anti-adhesion agent according to the type of asphalt mixture, making it possible to automatically spray an appropriate amount of anti-adhesion agent according to the type of asphalt mixture, eliminating the need for workers to manually spray additional anti-adhesion agent.

[0022] (7) The system has multiple tanks each containing multiple types of anti-adhesion agents, and the control unit selects a preset tank from the multiple tanks depending on the type of asphalt mixture and sprays the anti-adhesion agent. This makes it possible to automatically select and spray an appropriate anti-adhesion agent depending on the type of asphalt mixture, thereby eliminating waste of anti-adhesion agent. [Brief description of the drawings]

[0023] [Figure 1] 1 is a right side view showing a schematic configuration of an adhesion inhibitor spraying device for an asphalt mixture transport vehicle according to an embodiment of the present invention. [Diagram 2] 1 is a front view showing a schematic configuration of an adhesion inhibitor spraying device for an asphalt mixture transport vehicle according to an embodiment of the present invention. [Diagram 3] FIG. 3 is a right side view of FIG. 2. [Figure 4] FIG. 11 is a right side view showing the movement of the spray section and the wind and rain protection section. [Diagram 5] FIG. 11 is a right side view showing the movement of the spray section and the wind and rain protection section. [Figure 6] FIG. 11 is a right side view showing the movement of the spray section and the wind and rain protection section. [Figure 7] FIG. 13 is an explanatory diagram showing an example having a plurality of tanks each containing a plurality of types of adhesion preventive agents. [Figure 8] FIG. 1 shows a conventional asphalt mixture adhesion inhibitor spraying device, where (a) is a side view and (b) is a rear view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] FIG. 1 is a right side view showing the schematic configuration of an anti-adhesion agent spraying device for an asphalt mixture transport vehicle in an embodiment of the present invention, FIG. 2 is a front view showing the schematic configuration of an anti-adhesion agent spraying device for an asphalt mixture transport vehicle in an embodiment of the present invention, and FIG. 3 is a right side view of FIG. 2.

[0025] The asphalt mixture transport vehicles (hereinafter referred to as "vehicles") that are compatible with the anti-adhesion agent spraying device for asphalt mixture transport vehicles (hereinafter referred to as "spraying device") 1 in this embodiment are large vehicles with a maximum load capacity of 6.5 tons or more (so-called 10 ton dump trucks, 8 ton dump trucks, etc.) that are generally used for transporting asphalt mixture, medium-sized vehicles with a maximum load capacity of less than 6.5 tons (so-called 4 ton dump trucks, etc.), and small vehicles with a maximum load capacity of less than 3.0 tons (so-called 2 ton dump trucks, etc.).

[0026] As shown in Figures 1 and 2, the spraying device 1 in the embodiment of the present invention has a spraying section 2 that sprays an adhesion inhibitor for asphalt mixture onto the loading platform C2 of the vehicle C1, a windproof and rainproof section 3 that is connected to the spraying section 2 and protects the loading platform C2 from wind and rain, and a control section 4 that controls the operation of the spraying section 2. In this specification, the terms "front", "rear", "left", "right", "up" and "down" indicating directions are based on the front, rear, left, right, top and bottom of the vehicle C1 to be treated by the spraying device 1 in this embodiment. That is, "front" refers to the left in Figure 1, "rear" refers to the right in Figure 1, "left" refers to the right in Figure 2, "right" refers to the left in Figure 2, "up" refers to the top in Figure 2, and "down" refers to the bottom in Figure 2.

[0027] The spray unit 2 includes a gate-shaped body 20 that covers a floor C3 and a part of both side gates C4 and C5 of the loading platform C2 of the vehicle C1 (a range of about 1 / 4 to 1 / 3 of the floor C3 in the front-rear direction of the loading platform C2), and a plurality of spray nozzle groups 21a and 21b that are provided inside the body 20 and spray the adhesion preventive agent onto the loading platform C2. The spray nozzle groups 21a and 21b are provided on the left and right sides of the body 20, one pair each. The spray nozzle groups 21a and 21b are composed of a plurality of spray nozzles provided on each of the chemical solution supply pipes 22a and 22b that extend in the left-right direction. Each of the spray nozzle groups 21a and 21b has an electromagnetic valve controlled by the control unit 4. Each of the spray nozzle groups 21a and 21b sprays the adhesion preventive agent supplied through the chemical solution supply pipes 22a and 22b in a mist form.

[0028] The liquid medicine supply pipes 22a and 22b are movable in the left-right direction (the width direction of the vehicle C1) by the left-right movement motors 23a and 23b, respectively. The liquid medicine supply pipes 22a and 22b are movable in the up-down direction (the height direction of the vehicle C1) by the up-down movement motors 24a and 24b. That is, the spray nozzle groups 21a and 21b provided on the liquid medicine supply pipes 22a and 22b move together with the liquid medicine supply pipes 22a and 22b, respectively. The liquid medicine supply pipes 22a and 22b are provided with nozzle protection sensors 25a and 25b for protecting the spray nozzle groups 21a and 21b. For example, contact sensors can be used as the nozzle protection sensors 25a and 25b. When the nozzle protection sensors 25a, 25b detect contact while the left-right movement motors 23a, 23b are moving the chemical solution supply pipes 22a, 22b, the control unit 4 stops the corresponding left-right movement motors 23a, 23b.

[0029] The spray unit 2 also includes wheels 26 for traveling on a pair of rails 5 fixed on a foundation 6, and a travel motor 27 for driving the wheels 26. The pair of rails 5 are arranged side by side at a distance wider than the vehicle width of the vehicle C1. The spray unit 2 travels on the pair of rails 5 by driving the wheels 26 with the travel motor 27. It is preferable that the pair of rails 5 and the foundation 6 are installed at the same height as the surroundings so that the vehicle C1 can straddle and turn.

[0030] Further, the front end (left end in FIG. 1) and rear end (right end in FIG. 1) of the rail 5 are provided with main body forward / reverse limit position sensors 51, 52 for preventing the spray unit 2 and the wind / rainproof unit 3 from derailing from the rail 5. The main body forward / reverse limit position sensors 51, 52 may be, for example, a transmission type photoelectric sensor. When the main body forward / reverse limit position sensor 51 is blocked by the spray unit 2, that is, when the main body forward / reverse limit position sensor 51 detects the spray unit 2, the control unit 4 stops the running motor 27. When the main body forward / reverse limit position sensor 52 is blocked by the wind / rainproof unit 3, that is, when the main body forward / reverse limit position sensor 52 detects the wind / rainproof unit 3, the control unit 4 stops the running motor 27.

[0031] The spray unit 2 includes, in its body 20, the control unit 4 described above, a tank 28 that contains an anti-adhesion agent, and a pump 29 that transfers the anti-adhesion agent in the tank 28. The anti-adhesion agent contained in the tank 28 is a solution diluted with water. As shown in FIG. 3, the pump 29 has a function of transferring the anti-adhesion agent in the tank 28 to the spray nozzle groups 21a and 21b through the chemical supply pipes 22a and 22b, and a function of circulating and stirring the anti-adhesion agent between the tank 28 and the pump 29. In addition, a warning light 30 with audio output is provided on the upper portion of the body 20 of the spray unit 2 as a warning means.

[0032] The spray unit 2 also has the following sensors for detecting the positions of the gate C6 (see FIG. 5) of the loading platform C2, the floor C3, side gates C4 and C5, and the rear gate C7 (see FIG. 5).

[0033] (1) Vehicle stop sensors 31a, 31b The vehicle stop sensors 31a and 31b are sensors that detect the intrusion of the vehicle C1 into the spray unit 2 by detecting the position of the rear gate C7 of the loading platform C2 of the vehicle C1. For example, a transmission type photoelectric sensor can be used as the vehicle stop sensors 31a and 31b. The vehicle stop sensors 31a and 31b also serve to discriminate the vehicle type and are provided at different height positions. When the vehicle stop sensor 31a is blocked, that is, when the vehicle stop sensor 31a, which is located higher than the vehicle stop sensor 31b, detects the rear gate C7 of the loading platform C2 of the vehicle C1, the control unit 4 detects the intrusion of the vehicle C1 into the spray unit 2 and discriminates that the vehicle C1 is a large vehicle. In addition, when the vehicle stop sensor 31b is blocked, that is, when the vehicle stop sensor 31b, which is located lower than the vehicle stop sensor 31a, detects the rear gate C7 of the loading platform C2 of the vehicle C1, the control unit 4 detects the intrusion of the vehicle C1 into the spray unit 2 and determines that the vehicle C1 is a small or medium-sized vehicle. Note that it is also possible to configure the vehicle C1 to distinguish between medium and small vehicles by adding an additional vehicle stop sensor.

[0034] (2) Stop position exceeding detection sensors 32a, 32b The stop position overrun detection sensors 32a, 32b are sensors that detect the stop position overrun of the vehicle C1 relative to the spray unit 2 by detecting the position of the rear gate C7 of the loading platform C2 of the vehicle C1. For example, a transmission type photoelectric sensor can be used as the stop position overrun detection sensors 32a, 32b. The stop position overrun detection sensors 32a, 32b are provided at height positions corresponding to the vehicle stop sensors 31a, 31b, respectively. When the stop position overrun detection sensors 32a, 32b are blocked, that is, when the rear gate C7 of the loading platform C2 of the vehicle C1 is detected, the control unit 4 detects the stop position overrun of the vehicle C1 relative to the spray unit 2. Note that when the vehicle C1 is determined to be a large vehicle by the above-mentioned vehicle stop sensors 31a, 31b, the control unit 4 validates the detection result of the stop position overrun detection sensor 32a, which is located at a high position. On the other hand, when the vehicle C1 is determined to be a small or medium-sized vehicle, the control unit 4 validates the detection result of the stop position excess detection sensor 32b, which is located at a lower position.

[0035] (3) Forward stop sensors 33a, 33b The forward stop sensors 33a and 33b are sensors that detect the stop position of the forward movement of the spray unit 2 by detecting the position of the torii C6 of the loading platform C2 of the vehicle C1. For example, a transmission type photoelectric sensor can be used as the forward stop sensors 33a and 33b. The forward stop sensors 33a and 33b are provided at height positions corresponding to the positions of the torii C6 of the large vehicle and the small and medium-sized vehicle determined by the above-mentioned vehicle stop sensors 31a and 31b. When the forward stop sensors 33a and 33b are blocked, that is, when the torii C6 of the loading platform C2 of the vehicle C1 is detected, the control unit 4 detects that the forward movement of the spray unit 2 is at the stop position. Note that when the vehicle C1 is determined to be a large vehicle by the above-mentioned vehicle stop sensors 31a and 31b, the control unit 4 validates the detection result of the forward stop sensor 33a located at a high position. On the other hand, if the vehicle C1 is determined to be a small or medium-sized vehicle, the control unit 4 validates the detection result of the forward stop sensor 33b, which is located at a lower position.

[0036] (4) Collision prevention sensors 34a, 34b The collision prevention sensors 34a and 34b are sensors for preventing the spray unit 2 from colliding with the torii C6 by detecting the position of the torii C6 on the loading platform C2 of the vehicle C1. For example, a transmission type photoelectric sensor can be used as the collision prevention sensors 34a and 34b. The collision prevention sensors 34a and 34b are provided at height positions corresponding to the forward stop sensors 33a and 33b, respectively. When the collision prevention sensors 34a and 34b are blocked, that is, when the control unit 4 detects the torii C6 on the loading platform C2 of the vehicle C1, the control unit 4 detects that the spray unit 2 may collide with the torii C6. In addition, when the vehicle C1 is determined to be a large vehicle by the above-mentioned vehicle stop sensors 31a and 31b, the control unit 4 validates the detection result of the collision prevention sensor 34a located at a high position. On the other hand, when the vehicle C1 is determined to be a small or medium-sized vehicle, the control unit 4 validates the detection result of the collision prevention sensor 34b located at a low position.

[0037] (5) Bed width detection sensors 35a, 35b The bed width detection sensors 35a and 35b are sensors for detecting the width of the bed C2 of the vehicle C1 by detecting the positions of the side gates C4 and C5 of the bed C2 of the vehicle C1, respectively. The bed width detection sensors 35a and 35b are provided on the chemical supply pipes 22a and 22b, and move together with the chemical supply pipes 22a and 22b. For example, a transmission type photoelectric sensor can be used as the bed width detection sensors 35a and 35b. The control unit 4 detects the width of the bed C2 of the vehicle C1 by moving the chemical supply pipe 22 in the vehicle width direction and detecting the position where the bed width detection sensors 35a and 35b detect transmission as the position of the side gates C4 and C5 of the bed C2.

[0038] (6) Nozzle retraction sensors 36a, 36b The nozzle retraction sensors 36a and 36b are sensors that detect the retraction start position of the spray nozzle groups 21a and 21b by detecting the position of the rear gate C7 of the loading platform C2 of the vehicle C1 while the spray unit 2 is moving backward. For example, a transmission type photoelectric sensor can be used as the nozzle retraction sensors 36a and 36b. The nozzle retraction sensors 36a and 36b are provided at height positions corresponding to the vehicle stop sensors 31a and 31b, respectively. When the nozzle retraction sensors 36a and 36b are blocked while the spray unit 2 is moving backward, that is, when the rear gate C7 of the loading platform C2 of the vehicle C1 is detected, the control unit 4 detects that the spray nozzle groups 21a and 21b are in the retraction avoidance position. Note that, when the vehicle C1 is determined to be a large vehicle by the vehicle stop sensors 31a and 31b described above, the control unit 4 validates the detection result of the nozzle retraction sensor 36a located at a high position. On the other hand, if the vehicle C1 is determined to be a small or medium-sized vehicle, the control unit 4 validates the detection result of the nozzle retraction sensor 36b, which is located at a lower position.

[0039] (7) Loading platform floor detection sensors 37a, 37b The bed floor detection sensors 37a and 37b are sensors for detecting the position of the floor C3 of the bed C2 of the vehicle C1. The bed floor detection sensors 37a and 37b are provided in the chemical supply pipe 22 and move together with the chemical supply pipes 22a and 22b. For example, a laser sensor can be used as the bed floor detection sensors 37a and 37b. The control unit 4 detects the spray positions of the spray nozzle groups 21a and 21b by detecting the position of the floor C3 of the bed C2 using the bed floor detection sensors 37a and 37b.

[0040] The windproof and rainproof unit 3 is connected to the spraying unit 2 and covers the floor C3 and part of the side gates C4, C5 of the loading platform C2 of the vehicle C1 (a range of about 1 / 4 to 1 / 3 of the loading platform C2 in the front-to-rear direction). The windproof and rainproof unit 3 travels on the rails 5 along with the spraying unit 2 and covers an area of ​​about 1 / 3 to 1 / 2 of the loading platform C2 together with the spraying unit 2, thereby protecting the area on the loading platform C2 where the adhesion prevention agent is sprayed by the spraying unit 2 from wind and rain and preventing the adhesion prevention agent from scattering to the surrounding area.

[0041] The control unit 4 is, for example, a power panel with a touch panel 40. The touch panel 40 is provided with an operation start button 41 for starting the operation of the spray device 1 and an operation stop button 42 for stopping the operation in an emergency. When the operation start button 41 is touched, the control unit 4 controls the solenoid valves of the spray nozzle group 21a, 21b, the left and right movement motors 23a, 23b, the up and down movement motors 24a, 24b, the traveling motor 27, the pump 29, and the warning light 30 with audio output based on the detection results of the above-mentioned sensors (nozzle protection sensors 25a, 25b, vehicle stop sensors 31a, 31b, stop position over detection sensors 32a, 32b, forward stop sensors 33a, 33b, collision prevention sensors 34a, 34b, loading platform width detection sensors 35a, 35b, nozzle retraction sensors 36a, 36b, and the main body forward and backward limit position sensor 52). Furthermore, when the operation stop button 42 is touched, the control unit 4 stops the solenoid valves of the spray nozzle groups 21a and 21b, the left-right movement motors 23a and 23b, the up-down movement motors 24a and 24b, the travel motor 27, and the pump 29.

[0042] Next, a description will be given of the operation of the spray device 1 having the above configuration. Figures 4 to 6 are right side views showing the movement of the spray section 2 and the wind and rain protection section 3. <1> From stopping the vehicle to starting driving As shown in FIG. 4, the driver reverses the vehicle C1 and approaches the spray device 1 from behind the vehicle C1. When the vehicle stop sensor 31a or the vehicle stop sensor 31b is blocked, that is, when the control unit 4 detects the vehicle C1 by the vehicle stop sensor 31a or the vehicle stop sensor 31b, the control unit 4 makes the warning lamp with audio output 30 emit a buzzer sound and turns on the stop indicator lamp. When the control unit 4 detects the vehicle C1 by the vehicle stop sensor 31a, the control unit 4 determines that the vehicle C1 is a large vehicle. On the other hand, when the control unit 4 detects the vehicle C1 by the vehicle stop sensor 31b, the control unit 4 determines that the vehicle C1 is a small or medium-sized vehicle.

[0043] Moreover, when the vehicle C1 has entered beyond a predetermined position, the stop position overrun detection sensors 32a and 32b are shut off, and the overrun of the stop position of the vehicle C1 is detected. When the vehicle C1 is determined to be a large vehicle as described above, the control unit 4 validates the detection result of the stop position overrun detection sensor 32a, and when the vehicle C1 is determined to be a small or medium-sized vehicle, the control unit 4 validates the detection result of the stop position overrun detection sensor 32b. When the control unit 4 detects that the vehicle C1 has overrun the stop position, it sounds an alarm at the warning light with audio output 30 and switches the stop indicator light to a forward indicator light to signal the driver, and the driver adjusts the stop position of the vehicle C1.

[0044] After the vehicle C1 has stopped at a predetermined location, the driver touches the operation start button 41 on the touch panel 40 to start operation of the spray device 1.

[0045] <2> From starting up the spray device to shutting it down As shown in Fig. 5, the control unit 4 drives the wheels 26 to move the spray unit 2 forward toward the torii gate C6 of the vehicle C1. The windproof and rainproof unit 3 moves forward along with the spray unit 2. When the forward stop sensors 33a, 33b are blocked and the torii gate C6 of the vehicle C1 is detected, the control unit 4 stops the wheels 26 to stop the forward movement of the spray unit 2 and the windproof and rainproof unit 3. As described above, when the vehicle C1 is determined to be a large vehicle, the control unit 4 validates the detection result of the forward stop sensor 33a, and when the vehicle C1 is determined to be a small or medium-sized vehicle, the control unit 4 validates the detection result of the forward stop sensor 33b.

[0046] Furthermore, because there is a risk that the spray unit 2 may move forward and come into contact with the torii C6 and exceed the limit position for the forward movement of the main body due to a malfunction of the forward movement stop sensors 33a, 33b, when the collision prevention sensors 34a, 34b are shut off and the torii C6 of the vehicle C1 is detected, the control unit 4 stops the wheels 26 and stops the forward movement of the spray unit 2 and the wind and rain protection unit 3. When the vehicle C1 is determined to be a large vehicle as described above, the control unit 4 validates the detection result of the collision prevention sensor 34a, and when the vehicle C1 is determined to be a small or medium-sized vehicle, the control unit 4 validates the detection result of the collision prevention sensor 34b.

[0047] In addition, while the spray unit 2 is moving forward, the control unit 4 circulates and agitates the adhesion preventive agent between the tank 28 and the pump 29.

[0048] After the spray unit 2 advances and stops at a predetermined position, the control unit 4 moves the liquid supply pipes 22a, 22b in the vehicle width direction by the left-right movement motors 23a, 23b, and detects the positions of the side gates C4, C5 of the loading platform C2 of the vehicle C1 by the loading platform width detection sensors 35a, 35b, respectively, to detect the width of the loading platform C2 of the vehicle C1. The control unit 4 determines the vehicle width direction positions of the spray nozzle groups 21a, 21b according to the detected width of the loading platform C2, and moves the liquid supply pipes 22a, 22b in the vehicle width direction by the left-right movement motors 23a, 23b. Note that the control unit 4 may be configured to determine the vehicle width direction positions of the spray nozzle groups 21a, 21b according to the determined large vehicle or small / medium-sized vehicle of the vehicle C1 as described above, and move the liquid supply pipes 22a, 22b in the vehicle width direction by the left-right movement motors 23a, 23b.

[0049] After that, the control unit 4 detects the position of the floor C3 of the loading platform C2 by the loading platform floor detection sensors 37a, 37b to detect the spraying position of the spray nozzle group 21a, 21b, and lowers the chemical solution supply pipe 22 to a predetermined position by the up-down movement motors 24a, 24b. Then, the control unit 4 drives the wheels 26 by the traveling motor 27 to move the spray unit 2 back according to the length of the loading platform C2 of the vehicle C1, while spraying the adhesion prevention agent from the spray nozzle group 21a, 21b. At this time, since the wind and rain protection unit 3 moves back along with the spray unit 2, the loading platform C2-shaped part where the adhesion prevention agent is sprayed by the spray unit 2 is protected from wind and rain, and the adhesion prevention agent is prevented from scattering to the surroundings. Note that the torii gate C6 part where spraying starts and the rear gate C7 part where spraying is about to end have material accumulations such as asphalt mixture, and it is necessary to spray the adhesion prevention agent sufficiently, so the control unit 4 stops the spray unit 2 for a predetermined time at the start of spraying and just before the end of spraying to spray.

[0050] In addition, when the nozzle retraction sensors 36a, 36b are cut off during reversing, that is, when the rear gate C7 of the loading platform C2 of the vehicle C1 is detected, the control unit 4 detects that the spray nozzle groups 21a, 21b are in the retraction avoidance position, stops the travel motor 27, stops the wheels 26, and raises the chemical solution supply pipe 22 by the up-down movement motors 24a, 24b to a standby position where the spray nozzle groups 21a, 21b do not interfere with the rear gate C7. Thereafter, the control unit 4 drives the wheels 26 by the travel motor 27 to retract the spray unit 2 again, and when the vehicle stop sensors 31a, 31b become non-detecting (transmitted) as shown in FIG. 6, stops the travel motor 27, stops the wheels 26, and ends the operation.

[0051] As described above, in the spraying device 1 of this embodiment, when the spraying unit 2 moves by itself to spray the adhesion preventing agent onto the loading platform C2 from the spray nozzle group 21a, 21b provided inside the gate-shaped body 20 covering a part of the floor C3 and both side gates C4, C5 of the loading platform C2 of the vehicle C1, the windproof and rainproof unit 3 connected to the spraying unit 2 moves along with the spraying unit 2 and covers a part of the floor C3 and both side gates C4, C5 of the loading platform C2 of the vehicle C1, thereby protecting the part on the loading platform C2 where the adhesion preventing agent is sprayed by the spraying unit 2 from wind and rain, and preventing the adhesion preventing agent from scattering. Therefore, in the spraying device 1 of this embodiment, even in the case of strong wind and rain, it is possible to uniformly spread the adhesion preventing agent onto the loading platform C1 of the vehicle without scattering the adhesion preventing agent, and there is no need to build a building, and there is no need for expensive construction costs.

[0052] In addition, the spray device 1 in this embodiment has sensors for detecting the positions of the shrine gate C6, both side gates C4, C5 and rear gate C7 of the loading platform C2, and the spray nozzle groups 21a, 21b are arranged inside the fuselage 20 so as to be movable in the vehicle width direction and up and down direction of the vehicle C1, and the control unit 4 causes the spray unit 2 to self-propel based on the detection results of the sensors, and moves the spray nozzle groups 21a, 21b in the vehicle width direction and up and down direction to spray the anti-adhesion agent from the spray nozzle groups 21a, 21b.Therefore, while causing the spray unit 2 to self-propel, the positions of the shrine gate C6, both side gates C4, C5 and rear gate C7 of the loading platform C2 of the vehicle C1 can be detected, and the spray nozzle groups 21a, 21b can be moved to appropriate positions to spray the anti-adhesion agent, eliminating waste of the anti-adhesion agent.

[0053] In this embodiment, the windproof and rainproof part 3 covers about 1 / 3 to 1 / 2 of the loading platform C2 of the vehicle C1 together with the spraying part 2, but the rear end, i.e., the end opposite to the side connected to the spraying part 2, can be fixed on the foundation 6 and configured to have a stretchable part that stretches and contracts with the movement of the spraying part 2. The stretchable part can be configured, for example, as a bellows-shaped cover. This covers the entire part of the loading platform C2 of the vehicle C1 behind the spraying part 2, so that the part on the loading platform C2 where the adhesion prevention agent is sprayed by the spraying part 2 can be more reliably protected from wind and rain and the adhesion prevention agent can be prevented from scattering to the surroundings. In addition, since the stretchable part of the windproof and rainproof part 3 shrinks after the adhesion prevention agent is sprayed, the installation space can be reduced and the installation cost can be reduced.

[0054] In addition, in this case, by closing the rear end (the end opposite the side connected to the spray unit 2) of the wind and rainproof unit 3, wind and rain will not enter or exit from the end opposite the side connected to the spray unit 2, so that the area on the loading platform C2 where the anti-adhesion agent is sprayed by the spray unit 2 can be more effectively protected from wind and rain, and moreover, the area on the loading platform C2 where the anti-adhesion agent is sprayed by the spray unit 2 can be protected from wind and rain with even greater certainty, and the anti-adhesion agent can be prevented from scattering to the surrounding area.

[0055] The control unit 4 can also be configured to spray a preset amount of anti-adhesion agent according to the type of asphalt mixture loaded on the vehicle C1. Table 1 shows examples of spray amounts preset according to the type of asphalt mixture. The driver selects a selection number in Table 1 on the touch panel 40, and the control unit 4 sprays the set amount of anti-adhesion agent corresponding to the selected number. This makes it possible to automatically spray an appropriate amount of anti-adhesion agent according to the type of asphalt mixture, eliminating the need for additional manual spraying.

[0056] [Table 1]

[0057] In addition, the spray device 1 in this embodiment can be configured to have multiple tanks 28a, 28b that respectively contain multiple types of adhesion inhibitors, as shown in Fig. 7, and the control unit 4 can be configured to select a preset tank from the multiple tanks 28a, 28b according to the type of asphalt mixture and spray the adhesion inhibitor. Table 2 shows an example of a tank that is preset according to the type of asphalt mixture. The tank 28a with tank number 1 contains an adhesion inhibitor of a type with a large adhesion inhibitor effect (for example, a chemical solution with a dilution concentration of 10 times), and the tank 28b with tank number 2 contains an adhesion inhibitor of a type with a small adhesion inhibitor effect (for example, a chemical solution with a dilution concentration of 50 times).

[0058] The driver selects a selection number in Table 2 on the touch panel 40, and the control unit 4 drives the pumps 29a, 29b corresponding to the anti-adhesion agent of the tank number corresponding to the selected number, and sprays it from the spray nozzle groups 21a, 21b. This makes it possible to automatically select and spray an appropriate anti-adhesion agent according to the type of asphalt mixture, eliminating waste of the anti-adhesion agent.

[0059] [Table 2] [Industrial Applicability]

[0060] The anti-adhesion agent spraying device for asphalt mixture transport vehicles of the present invention is useful as a device for spraying an anti-adhesion agent for asphalt mixtures onto the loading platform of an asphalt mixture transport vehicle such as a dump truck, and is particularly suitable as a device capable of uniformly spreading the anti-adhesion agent onto the loading platform of an asphalt mixture transport vehicle such as a dump truck even in strong winds and rain. [Explanation of symbols]

[0061] 1 Spray device 2 Spray section 3 Windproof and rainproof part 4. Control Unit 5 Rail 6 Basics 20. Torso 21a, 21b Spray nozzle group 22a, 22b Chemical supply pipe 23a, 23b Left and right movement motor 24a, 24b Motor for vertical movement 25a, 25b Nozzle protection sensor 26 wheels 27 Driving motor 28, 28a, 28b Tank 29, 29a, 29b Pump 30 Warning light with audio output 31a, 31b Vehicle stop sensor 32a, 32b Sensor for detecting over-stop position 33a, 33b Forward stop sensor 34a, 34b Collision prevention sensor 35a, 35b Loading platform width detection sensor 36a, 36b Nozzle retraction sensor 37a, 37b Loading platform floor detection sensor 40 Touch Panel 41 Operation start button 42 Operation stop button 51,52 Body forward / reverse limit position sensor C1 Vehicle C2 Cargo bed C3 floor C4,C5 Side gate C6 Torii C7 Rear gate

Claims

1. An anti-adhesion agent spraying device for an asphalt mixture transport vehicle, which sprays an anti-adhesion agent for an asphalt mixture onto a loading platform of the asphalt mixture transport vehicle, A spray unit that includes a gate-shaped body covering the floor of the bed of the asphalt mixture transport vehicle and a part of both side panels, a spray nozzle that is provided inside the body and sprays an adhesion inhibitor onto the bed, and that moves independently in the forward and backward directions of the asphalt mixture transport vehicle; A windproof and rainproof part that is connected to the spray part and covers a part of the floor and both side panels of the loading platform of the asphalt mixture transport vehicle; A control unit that controls the operation of the spray unit; An anti-adhesion agent spraying device for an asphalt mixture transport vehicle.

2. A pair of rails are arranged side by side at an interval wider than the width of the asphalt mixture transport vehicle, The spray unit is self-propelled on the rail.

2. The adhesion inhibitor spraying device for an asphalt mixture transport vehicle according to claim 1.

3. An anti-adhesion agent spraying device for an asphalt mixture transport vehicle as described in claim 1 or 2, wherein the wind and rainproof section has a fixed end on the side opposite to the side connected to the spraying section, and has an expandable section that expands and contracts in accordance with the movement of the end on the side connected to the spraying section.

4. 4. An anti-adhesion agent spraying device for an asphalt mixture transport vehicle according to claim 1, wherein the wind and rain protection section has a closed end opposite to the end connected to the spray section.

5. The vehicle has sensors for detecting the positions of the gates, side panels and rear gate of the loading platform, The spray nozzle is provided inside the body so as to be movable in the vehicle width direction and the vertical direction of the asphalt mixture transport vehicle, The control unit controls the spray unit to move independently based on the detection results from the sensors and moves the spray nozzle in the vehicle width direction and up and down direction while spraying the anti-adhesion agent from the spray nozzle.

6. The adhesion inhibitor spraying device for an asphalt mixture transporting vehicle according to any one of claims 1 to 5, wherein the control unit sprays a predetermined amount of the adhesion inhibitor depending on the type of the asphalt mixture.

7. A plurality of tanks each containing a plurality of types of adhesion preventive agents, The control unit selects a preset tank from among the plurality of tanks depending on the type of asphalt mixture and sprays the anti-adhesion agent.

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