JP7561561B2 - Anti-adhesion agent spraying device - Google Patents

Description

The present invention relates to a spraying device for an anti-adhesion agent that suppresses adhesion of asphalt mixtures, and in particular to a spraying device that sprays an anti-adhesion agent onto the loading platform of a vehicle transporting asphalt mixtures.

Conventionally, in asphalt plants installed in asphalt mixture manufacturing factories, when the manufactured asphalt mixture is unloaded onto the loading platform of a transport vehicle such as a dump truck for shipping, in order to prevent the sticky asphalt mixture from adhering to the surface of the loading platform, for example, the driver climbs onto the loading platform each time and manually sprays various types of adhesion prevention agents, the main ingredients of which are heavy oil, light oil, or vegetable oil, etc., in suitable containers, onto the surface of the loading platform.

However, the loading platform of the transport vehicle becomes slippery due to the spraying of the oil-based anti-adhesion agent, and the driver climbing onto the loading platform to carry out the work poses the risk of accidents such as tipping or falling, which is unsafe and extremely troublesome, placing a heavy burden on the driver. In addition, since the amount of anti-adhesion agent sprayed is left to the driver's discretion, in some cases more than the appropriate amount of anti-adhesion agent may be sprayed, resulting in waste.

In response to this, there is a device that automatically sprays an anti-adhesion agent onto the loading platform of a transport vehicle (see Patent Document 1). In this spraying device, a spray nozzle is fixed to a pillar or the like of the plant body of the asphalt plant, which is located above the loading platform of the transport vehicle, and a predetermined amount of anti-adhesion agent is automatically sprayed from the spray nozzle onto the loading platform of the transport vehicle that has entered below the plant body to load the asphalt mixture. This is expected to improve the work safety of the driver, reduce the burden, and spray the appropriate amount.

JP 2019-157396 A

However, in the above-mentioned conventional device, the spray nozzle is fixed to a pillar or the like of the plant body located above the loading platform of the transport vehicle, and the nozzle nozzle is somewhat spaced from the loading platform surface, so it is expected to be relatively susceptible to the effects of wind. In a strong wind, some of the adhesion prevention agent sprayed from the spray nozzle may fly off, and in some cases, it may come off the loading platform and be sprayed on the driver's seat or the surrounding ground, causing pollution to the surrounding environment and waste.

In consideration of the above, the present invention aims to provide an anti-adhesion agent spraying device that can reduce the effects of wind and stably spray the asphalt mixture onto the loading platform of a transport vehicle even in strong winds.

In the anti-adhesion agent spraying device according to claim 1 of the present invention, a traveling rail is erected at a predetermined height position on two pedestals arranged side by side on one side of an aisle for vehicles transporting asphalt mixture, which is located directly below the plant body and/or asphalt mixture silo of an asphalt plant, substantially parallel to the aisle and substantially horizontally , a traveling cart is provided on the traveling rail so that it can run freely, and the traveling cart is provided with a swivel arm that can rotate toward the aisle side about a vertical axis and can move up and down, the swivel arm is provided with a spray nozzle for spraying the anti-adhesion agent, a bed height sensor is provided around the aisle or on the swivel arm for detecting the bed height of a transport vehicle that has entered the aisle, and a spray controller is provided which swivels the swivel arm toward the aisle when spraying the anti-adhesion agent, and moves the swivel arm up and down based on the detection result of the bed height sensor to bring the spray nozzle close to the bed of the transport vehicle, and in that state causes the traveling cart to travel while spraying the anti-adhesion agent, thereby spraying the anti-adhesion agent onto the bed of the transport vehicle.

In addition, in the anti-adhesion agent spraying device described in claim 2, the swivel arm is equipped with a spray nozzle for the tailgate that sprays an anti-adhesion agent toward the inner wall surface of the tailgate of the loading platform of the transport vehicle, and the tip of the swivel arm is equipped with a proximity sensor that can detect the tailgate of the loading platform that is located immediately adjacent to the tip of the swivel arm .

In addition, in the anti-adhesion agent spraying device described in claim 3, a vertical rod having the same height as the tailgate of the loading platform of a large transport vehicle is suspended from the tip of the swivel arm, and the lower end of the vertical rod is connected to approximately the center of a horizontal rod slightly shorter than the width of the loading platform of a small transport vehicle, and a plurality of spray nozzles are provided at predetermined intervals along the longitudinal direction of the horizontal rod .

According to the anti-adhesion agent spraying device of claim 1 of the present invention, a running rail is erected at a predetermined height position on two pedestals arranged side by side on one side of an aisle for vehicles transporting asphalt mixture, which is located directly below the plant body and/or asphalt mixture silo of an asphalt plant, and which is approximately parallel to the aisle and approximately horizontal, and a running cart is provided on the running rail so that it can travel freely, and a platform height sensor is provided for detecting the height of the platform of the transport vehicle, and when spraying the anti-adhesion agent, the swivel arm is rotated toward the aisle side, and based on the detection result of the platform height sensor, the swivel arm is moved up and down to bring the spray nozzle close to the platform of the transport vehicle, and in this state, the traveling cart is caused to travel while spraying the anti-adhesion agent to spray the anti-adhesion agent onto the platform of the transport vehicle. Therefore, the influence of wind when spraying the anti-adhesion agent is suppressed, and the anti-adhesion agent can be stably sprayed onto the platform of the transport vehicle even in strong winds.

In addition, according to the anti-adhesion agent spraying device described in claim 2, the swivel arm is equipped with a spray nozzle for the tailgate that sprays an anti-adhesion agent toward the inner wall surface of the tailgate of the loading platform of the transport vehicle, and the tip of the swivel arm is equipped with a proximity sensor that can detect the tailgate of the loading platform that is located immediately nearby on the tip side of the swivel arm , so that adhesion of asphalt mixture not only to the floor surface of the loading platform but also to the inner wall surface of the tailgate can be effectively suppressed.

In addition, according to the anti-adhesion agent spraying device described in claim 3, a vertical rod the height of the tailgate of the loading platform of a large transport vehicle is suspended from the tip of the swivel arm, and the lower end of the vertical rod is connected to approximately the center of a horizontal rod that is slightly shorter than the width of the loading platform of a small transport vehicle, and a plurality of spray nozzles are provided at predetermined intervals along the longitudinal direction of the horizontal rod , so that the effects of wind when spraying the anti-adhesion agent are suppressed, making it possible to stably spray the anti-adhesion agent onto the loading platform of the transport vehicle even in strong winds .

1 is a front view showing a state in which an adhesion inhibitor spraying device according to the present invention is installed in a plant body of an asphalt plant. FIG. 2 is a partially cutaway side view of FIG. 1 . FIG. 3 is a diagram corresponding to FIG. 2 and illustrating a state in which an adhesion inhibitor is sprayed onto a small transport vehicle. 4 is a view taken along the line AA in FIG. 3. FIG. 4 is a view corresponding to FIG. 3 and showing a state in which the spray nozzle has been moved to the tip of the loading platform. 1A to 1C are explanatory diagrams illustrating a series of operations of an anti-adhesion agent spraying device when spraying an anti-adhesion agent onto a small transport vehicle. FIG. 3 is a diagram corresponding to FIG. 2 and illustrating a state in which an adhesion inhibitor is sprayed onto a large transport vehicle. 8 is a view taken along the line BB in FIG. 7. 8 is a view corresponding to FIG. 7 and showing a state in which the spray nozzle has been moved to the tip of the loading platform. FIG. 1A to 1C are explanatory diagrams illustrating a series of operations of an adhesion inhibitor spraying device when spraying an adhesion inhibitor onto a large transport vehicle. FIG. 5 is a view corresponding to FIG. 3 and showing another embodiment of the platform height sensor.

In the anti-adhesion agent spraying device according to the present invention, a running rail is erected along the side of a passageway for vehicles transporting asphalt mixtures, which is located directly below the plant body of an asphalt plant and/or an asphalt mixture silo that temporarily stores asphalt mixtures produced in the plant body, and a running cart is provided so that it can run freely. The running cart is provided with a rotating arm that can rotate freely toward the passageway around a support part that is a vertical axis and can move up and down, and a spray nozzle is provided below the rotating arm to spray an anti-adhesion agent toward the floor surface of the loading platform of the transport vehicle, etc.

Various configurations can be used to move the swivel arm up and down, such as configuring the pivot support of the swivel arm to be able to slide or expand and contract in the vertical direction, or connecting the swivel arm to the pivot support so that it can tilt in the vertical direction.

A platform height sensor is provided around the passage or on the rotating arm to detect the platform height of the transport vehicle that has entered the passage and is waiting. Vehicles for transporting asphalt mixtures are usually of various sizes, from relatively small 2-ton trucks to relatively large 10-ton trucks, and the platform height differs depending on the size, but the platform height is detected each time by the platform height sensor.

The system is also provided with a spray controller that performs various controls when spraying the adhesion prevention agent onto the platform of the transport vehicle, such as controlling the operation of the travelling carriage and the swivel arm, and controlling the spray from the spray nozzle. Note that the spray control function may be provided in an existing plant operation panel, etc., without providing a separate spray controller.

Preferably, the rotating arm is equipped with a gate spray nozzle that sprays an adhesion prevention agent toward the inner wall surface of the gate plate of the loading platform of the transport vehicle. This allows the adhesion prevention agent to be sprayed evenly not only onto the floor surface of the loading platform of the transport vehicle, but also onto the inner wall surface of the gate plate, making it possible to more effectively suppress adhesion of the asphalt mixture.

Moreover, preferably, the rotating arm and/or spray nozzle is equipped with a heater for keeping the adhesion inhibitor warm. This allows the adhesion inhibitor to be kept at a suitable temperature even in cold regions or during winter, making it possible to prevent problems such as freezing and solidification of the adhesion inhibitor.

When the anti-adhesion agent is sprayed onto the bed of a transport vehicle by the anti-adhesion agent spraying device, when the transport vehicle enters and stops in the passage directly below the plant body or the asphalt mixture silo, the spray controller first rotates the swivel arm toward the passage, and moves the swivel arm up and down based on the detection result of the bed height sensor to bring the spray nozzle close to the bed of the transport vehicle. Next, while spraying the anti-adhesion agent, the traveling cart travels at a predetermined speed approximately parallel to the transport vehicle on the passage, and the anti-adhesion agent is sprayed over the entire surface of the bed of the transport vehicle.

At this time, the spray nozzle and the loading platform of the transport vehicle are in close proximity, so they are relatively unaffected by wind, and the anti-adhesion agent can be stably sprayed onto the loading platform even in strong winds, preventing damage to the surrounding environment and waste of the anti-adhesion agent. In addition, by making the spray less susceptible to wind as a close-proximity spray, the anti-adhesion agent can be further atomized (misted) when sprayed, making it possible to coat the loading platform floor and the inner wall surfaces of the gate plate with a smaller amount of anti-adhesion agent evenly, which is expected to reduce costs and also reduce dripping on the inner wall surfaces of the gate plate (vertical surfaces) and the like.

Below, one embodiment of the present invention will be described with reference to the drawings.

In the figure, 1 is the plant body of the asphalt plant, which is composed of various pieces of equipment such as a vibrating screen (not shown), aggregate storage bin (not shown), and mixer 3 stacked on an elevated platform 2, with an aisle 5 directly below for the entrance and exit of asphalt mixture transport vehicles 4a, 4b. When asphalt mixture is dispensed from mixer 3, which is installed near the center of the plan view on the lowest floor 6 of the elevated platform 2, transport vehicles 4a, 4b enter the lower part of the plant body 1 from the aisle 5 and stop and wait at a predetermined position, it is dropped onto the loading platform 7 behind transport vehicles 4a, 4b. In the figure, 4a represents a relatively small transport vehicle (e.g., 4 ton size), and 4b represents a relatively large transport vehicle (e.g., 10 ton size).

In the figure, 8 is an anti-adhesion agent spraying device that sprays an anti-adhesion agent onto the loading platform 7 of the transport vehicles 4a and 4b before the asphalt mixture is loaded, and is mainly composed of a running rail, a running cart, a swivel arm, a spray nozzle, a spray controller, etc., which will be described later.

Of the four pillars 9a to 9d supporting the four corners of the elevated platform 2, two pillars 9a, 9b are arranged side by side on one side of the passage 5. At a predetermined height, a running rail 10 is erected substantially parallel and horizontally along the passage 5, and a running carriage 11 is provided on the running rail 10 so that it can run freely. As a drive source for running the running carriage 11, the running carriage 11 itself may be equipped with a self-propelled drive motor, but the running carriage 11 may also be fixed to a timing belt or timing chain arranged along the longitudinal direction of the running rail 10, and the running carriage 11 may be run by rotating the timing belt or timing chain using a drive motor separately provided.

A swivel arm 13 of a predetermined length is provided on the upper part of the traveling cart 11 so that it can rotate toward the passage 5 around a vertical axis, the pivot support 12, and can move up and down. As a configuration for moving the swivel arm 13 up and down, for example, the pivot support 12 that supports the base end of the swivel arm 13 itself can be configured to slide or expand and contract in the vertical direction, but in this embodiment, a crane structure is used in which the swivel arm 13 is connected to the pivot support 12 so that it can tilt up and down within a predetermined angle range.

A vertical rod 14 of a predetermined length (preferably about the height of the tailgate around the loading platform 7 of the large transport vehicle 4b) is suspended from the tip of the swivel arm 13 so as to be able to swing freely, and a horizontal rod 15 of a predetermined length (preferably slightly shorter than the width of the loading platform 7 of the small transport vehicle 4a) is connected to the lower end of the vertical rod 14 at approximately the center, and multiple spray nozzles 16a, 16b for spraying the adhesion prevention agent are fixed at predetermined intervals along the longitudinal direction of the horizontal rod 15. Each spray nozzle 16a, 16b also has a valve body (not shown) such as an electromagnetic valve or a check valve built in so as to be able to be opened and closed freely to prevent dripping of the adhesion prevention agent.

Here, 16a in the figure is a spray nozzle for floors (with the nozzle facing directly downward) that mainly sprays anti-adhesion agent onto the floor surface 7a of the loading platform 7 of the transport vehicles 4a and 4b, while 16b in the figure is a spray nozzle for the tailgate (with the nozzle facing diagonally downward or horizontally) that mainly sprays anti-adhesion agent onto the inner wall surface 7b of the tailgate of the loading platform 7 of the transport vehicles 4a and 4b.

In this embodiment, as described above, each spray nozzle 16a, 16b is fixed to the horizontal rod 15 suspended from the tip of the swivel arm 13, but this is not limited to the above configuration. For example, multiple spray nozzles may be fixed at a predetermined interval directly to the bottom of the swivel arm 13.

However, by adopting the configuration of this embodiment, it becomes possible to lower the horizontal rod 15 into the loading platform 7 of the transport vehicle 4a, 4b (preferably near the floor surface 7a). At that time, the side panels around the loading platform 7 act as a windbreak, and even in strong winds, it becomes possible to adhere the adhesion prevention agent sprayed from each spray nozzle 16a, 16b fixed to the horizontal rod 15 to the inner wall surface of the loading platform 7 with minimal scattering to the surrounding area.

In addition, heaters 17, such as belt heaters or band heaters, are attached to the horizontal rod 15 and spray nozzles 16a, 16b, etc., to keep the adhesion prevention agent warm. Heavy oil and light oil, etc., among adhesion prevention agents, may become viscous and solidify at low temperatures, while vegetable oils and fats mixed and emulsified with water containing surfactants may have water in the liquid agent freeze. However, by keeping the temperature at about 30°C, for example, with the heater 17, the above-mentioned problems can be prevented, making it suitable for use even in cold regions and in winter. In this embodiment, the heater 17 is provided on the horizontal rod 15 and spray nozzles 16a, 16b, but it may also be attached to the rotating arm 13, etc., further upstream.

In the figure, 18 is a platform height sensor such as an ultrasonic sensor or laser sensor that detects the height of the platform 7 (floor surface 7a) of the transport vehicles 4a, 4b that have entered the passage 5 below the elevated platform 2 and are stopped or waiting. The platform height sensor 18 can sequentially detect the platform height of each transport vehicle, for example, of 2 to 10 ton size, which is generally used as a transport vehicle for asphalt mixture. In this embodiment, the platform height sensor 18 is installed on the underside of the floor 6 above the passage 5, but this is not limited to the location, and it can be installed around the passage 5, including the side of the passage 5, or on the rotating arm 13, for example.

When the platform height sensor is installed on the swivel arm 13, for example, as shown in FIG. 11, a platform height sensor 18' such as a proximity switch or limit switch capable of detecting the platform 7 (floor surface 7a) located below and in the immediate vicinity is attached to a horizontal rod 15 or the like suspended from the tip of the swivel arm 13. When the tip of the swivel arm 13 is gradually lowered with the swivel arm 13 rotated (deployed) toward the aisle 5, if the platform height sensor 18' detects the floor surface 7a of the platform 7 of the transport vehicle 4a, 4b, it will recognize this as the height of the platform 7.

The tip of the swivel arm 13 is equipped with a proximity sensor 19 such as a proximity switch or limit switch that can detect the tailgate of the loading platform 7 located in the front (tip side of the swivel arm 13) and in the immediate vicinity. When the traveling cart 11 is traveling toward the end 10b side of the traveling rail 10 (entrance side of the passage 5) with the swivel arm 13 rotated (deployed) toward the passage 5 side, if the proximity sensor 19 detects the tailgate at the front end of the loading platform 7 of the transport vehicles 4a, 4b, it recognizes this as the end of the loading platform 7 and stops the traveling of the traveling cart 11 and the spraying of the adhesion prevention agent from the spray nozzles 16a, 16b.

In addition to the various facilities mentioned above, the anti-adhesion agent spraying device 8 also includes, although not shown in the figure, a storage tank for storing the anti-adhesion agent, a supply line such as a rubber hose or PVC pipe that supplies the anti-adhesion agent from the storage tank to each spray nozzle 16a, 16b via the swivel arm 13 or horizontal rod 15, and a supply pump that pressure-feeds the anti-adhesion agent from the storage tank to each spray nozzle 16a, 16b via the supply line.

In the figure, 20 denotes a spray controller that performs various controls when spraying the adhesion prevention agent onto the loading platform 7 of the transport vehicles 4a and 4b, such as controlling the operation of the traveling cart 11 and the swivel arm 13, and controlling the spray from each of the spray nozzles 16a and 16b by switching the supply pump on and off.

Next, the case where the adhesion prevention agent spraying device 8 sprays the adhesion prevention agent on the loading platform 7 of a relatively small (e.g., 4 ton size) transport vehicle 4a will be described with reference to Figs. 1 to 6. First, as shown in Figs. 1 to 2 and Fig. 6(a), in the adhesion prevention agent spraying device 8 in the standby state, the swivel arm 13 is rotated to one side of the passage 5 to retract so as not to prevent the transport vehicle 4a from entering the passage 5, and the traveling carriage 11 is moved to the base end 10a of the traveling rail 10 (the deepest side as seen from the direction in which the transport vehicle 4a reverses into the passage 5). Then, in this state, the transport vehicle 4a reverses into the passage 5 and stops and waits at a predetermined position (a position where the asphalt mixture discharged from the upper mixer 3 can be received on the rear side of the loading platform 7 at the rear of the vehicle). At this time, the loading platform height sensor 18 detects the height of the loading platform 7 (floor surface 7a) of the transport vehicle 4a in the standby state.

The reason why the asphalt mixture is received at the rear side of the loading platform 7 rather than in the center is to load the asphalt mixture evenly across the entire loading platform 7. After initially loading the asphalt mixture at the rear side of the loading platform 7, the driver backs up the transport vehicle 4a slightly to shift the receiving position of the asphalt mixture towards the front of the loading platform 7, and by repeating this process, it is possible to load the asphalt mixture in a constant layer thickness across the entire loading platform 7. Therefore, the initial stopping position of the transport vehicle 4a before loading the asphalt mixture, where the anti-adhesion agent is sprayed, is slightly biased towards the entrance to the aisle 5 as shown in the drawing.

Next, as shown in Figures 3 and 6(b), the spray controller 20 rotates (deploys) the swivel arm 13 toward the aisle 5, which is in the X direction in the figure, and based on the detection result of the platform height sensor 18, lowers the tip side of the swivel arm 13 in the Z direction in the figure, and lowers the horizontal rod 15 suspended from the tip of the swivel arm 13 into the inside of the platform 7 of the transport vehicle 4a, so that each spray nozzle 16a, 16b fixed to the horizontal rod 15 is brought into close proximity with the floor surface 7a and the inner wall surface 7b of the platform 7 of the transport vehicle 4a. In addition, when the traveling cart 11 is positioned at the base end 10a of the traveling rail 10, the rotating arm 13 is rotated toward the passage 5 side, and then the tip end is lowered so that the horizontal rod 15 can be lowered near the rear end of the loading platform 7 of the waiting transport vehicle 4a (slightly forward of the tailgate at the rear end). The positioning of the traveling cart 11 and the rotation angle of the rotating arm 13 are preset in the spray controller 20.

Next, as shown in Figures 4 to 5 and Figure 6 (c), while maintaining the above state, the traveling cart 11 is moved at a predetermined speed in the Y direction in the figure while spraying the anti-adhesion agent from each of the spray nozzles 16a, 16b, and the anti-adhesion agent is sprayed uniformly over the entire surface of the floor surface 7a of the loading platform 7 of the transport vehicle 4a and the inner wall surface 7b of the gate plate.

When the proximity sensor 19 provided at the tip of the swivel arm 13 detects the tailgate at the front end of the loading platform 7 of the transport vehicle 4a, it recognizes that the loading platform 7 is at its end, stops the travel of the traveling cart 11, and stops spraying the adhesion inhibitor from each spray nozzle 16a, 16b, and then raises the tip side of the swivel arm 13 to remove the horizontal rod 15 from the loading platform 7 of the transport vehicle 4a. Next, while rotating the swivel arm 13 to one side of the passage 5, the traveling cart 11 is retreated to the base end 10a of the running rail 10, and returns to the initial standby state. Then, the asphalt mixture is dispensed from the upper mixer 3 and loaded onto the transport vehicle 4a that has finished spraying the adhesion inhibitor over the entire surface of the loading platform 7, and the transport vehicle 4a that has finished loading is transported and shipped to the paving site.

Next, the case where the adhesion prevention agent is sprayed onto the loading platform 7 of a relatively large (e.g., 10 ton size) transport vehicle 4b using the adhesion prevention agent spraying device 8 will be described with reference to Figures 1 to 2 and Figures 7 to 10. Note that the basic operation and control are substantially the same as in the case of the small transport vehicle 4a described above, so a description of the overlapping parts will be omitted.

In the case of a large transport vehicle 4b, the height of the loading platform 7 is higher than that of a small transport vehicle 4a, but the tip of the swivel arm 13 is moved up and down each time to adjust based on the detection results of the loading platform height sensor 18, so that, just like in the case of a small transport vehicle 4a, the horizontal rod 15 suspended from the tip of the swivel arm 13 can be lowered into the loading platform 7 of the transport vehicle 4b, and each spray nozzle 16a, 16b fixed to the horizontal rod 15 can be brought close to the floor surface 7a and the inner wall surface 7b of the loading platform 7 of the transport vehicle 4b. As a result, the influence of wind is suppressed and the adhesion prevention agent can be stably sprayed onto the surface of the loading platform 7.

As shown in Figures 7 to 10, when the large transport vehicle 4b stops and waits to receive asphalt mixture from the upper mixer 3, the front end of the loading platform 7 of the large transport vehicle 4b protrudes farther forward (toward the entrance of the aisle 5) than the pedestals 9b, 9d of the elevated platform 2 of the plant main body 1, compared to the case of the small transport vehicle 4a. In this case, if the rotating arm 13 on the traveling cart 11 is configured to rotate approximately 90 degrees toward the aisle 5 (in a direction substantially perpendicular to the aisle 5), it becomes necessary to greatly extend the traveling rail 10 toward the front of the aisle 5 by the protruding amount, but in that case, it will interfere with the travel of the transport vehicle 4b, which is undesirable from the viewpoint of work safety.

In this embodiment, the swivel arm 13 and horizontal rod 15 are connected so that their longitudinal directions form a predetermined angle (for example, about 30 to 60 degrees) in a plan view, and when the swivel arm 13 is rotated toward the aisle 5 so that the longitudinal direction of the horizontal rod 15 is approximately aligned with the width direction of the platform 7 of the transport vehicle 4b (at this time, the swivel arm 13 is inclined toward the front side of the aisle 5 in a plan view), the horizontal rod 15 protrudes forward from the position of the traveling cart 11 to the front side of the aisle 5. As a result, when the traveling cart 11 reaches the terminal end 10b of the traveling rail 10 (the entrance to the aisle 5), the horizontal rod 15 can be brought close to the front end of the platform 7 of the transport vehicle 4b, which eliminates the need to extend the traveling rail 10 as described above, and is more preferable in terms of work safety.

In this way, the anti-adhesion agent spraying device 8 according to the present invention is configured to be able to spray the anti-adhesion agent while maintaining the spray nozzles 16a, 16b in close proximity to the loading platform 7 of the transport vehicles 4a, 4b, so that the anti-adhesion agent can be stably sprayed onto the loading platform 7 even in strong winds, preventing contamination of the surrounding environment and wasting of the anti-adhesion agent.

In this embodiment, the case where an anti-adhesion agent is sprayed onto transport vehicles 4a, 4b entering the passage 5 located directly below the plant body 1 of the asphalt plant has been described, but the present invention can also be applied to the case where an anti-adhesion agent is sprayed onto transport vehicles 4a, 4b entering the passage located directly below the asphalt mixture silo that temporarily stores the asphalt mixture produced in the plant body 1.

The present invention can be widely used not only for the plant body of an asphalt plant or an asphalt mixture silo, but also for spraying an adhesion inhibitor onto a transport vehicle that transports asphalt mixture.

REFERENCE SIGNS LIST 1: Plant body 2: Elevated platform 3: Mixer 4a, 4b: Transport vehicle 5: Passage 7: Loading platform 7a: Floor surface (loading platform) 7b: Gate plate inner wall surface 7b (loading platform)
8: Anti-adhesion agent spray device 9a to 9d: Pillars (elevated platforms)
REFERENCE SIGNS LIST 10: Traveling rail 11: Traveling cart 12: Axle support (vertical axis) 13: Swivel arm 15: Horizontal rod 16a, 16b: Spray nozzle 17: Heater 18, 18': Platform height sensor 19: Proximity sensor 20: Spray controller

Claims (3)

an anti-adhesion agent spraying device comprising: a traveling rail disposed at a predetermined height position on two pedestals arranged side by side on one side of an aisle for vehicles transporting asphalt mixture, the passage being located directly below the plant body and/or asphalt mixture silo of an asphalt plant; a traveling carriage disposed on the traveling rail so as to be able to travel freely; a swivel arm disposed on the traveling carriage so as to be able to rotate toward the passage side about a vertical axis and to be able to move up and down; a spray nozzle disposed on the swivel arm for spraying an anti-adhesion agent; a bed height sensor disposed around the passage or on the swivel arm for detecting the bed height of a transport vehicle that has entered the passage; and a spray controller which swivels the swivel arm toward the passage side when spraying the anti-adhesion agent, and moves the swivel arm up and down based on the detection result of the bed height sensor to bring the spray nozzle close to the bed of the transport vehicle, and in that state causes the traveling carriage to travel while spraying the anti-adhesion agent, thereby spraying the anti-adhesion agent onto the bed of the transport vehicle. The anti-adhesion agent spraying device according to claim 1, characterized in that the rotating arm is equipped with a spray nozzle for the tailgate that sprays an anti-adhesion agent toward the inner wall surface of the tailgate of the loading platform of the transport vehicle, and the tip of the rotating arm is equipped with a proximity sensor that can detect the tailgate of the loading platform located immediately adjacent to the tip of the rotating arm. The anti -adhesion agent spraying device according to claim 1 or 2, characterized in that a vertical rod having a length equal to the height of the tailgate of the loading platform of a large transport vehicle is suspended from the tip of the swivel arm, and a horizontal rod having a length slightly shorter than the width of the loading platform of a small transport vehicle is connected to the lower end of the vertical rod at approximately the center, and a plurality of spray nozzles are provided at predetermined intervals along the longitudinal direction of the horizontal rod.

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