Paint injecting device and coating device

Abstract

To provide a paint injecting device that can form demarcation lines on a road surface with sufficient accuracy even if a vehicle for demarcation line construction travels at a higher speed than before.SOLUTION: A paint injecting device 12 according to the present invention includes: a first rotor 12a and a second rotor 12b that form a biaxial rotor; and a paint out-flowing valve 12e that is provided in a flow path 12d from a paint in-flowing port 12c to the biaxial rotor. The first rotor 12a is a metal brush rotor, and the second rotor 12b is a gear rotor, and a rotating speed of the first rotor 12a is faster than that of the second rotor 12b. There is a structure in which the paint that passes through the paint out-flowing valve 12e by opening-closing control falls between the first rotating body 12a and the second rotating body 12b, whose opposing outer surfaces rotate downward on their respective axes, the paint that falls is injected onto a road surface by using the centrifugal force of the two-axis rotor.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a paint spraying device that sprays paint for marking onto a road surface, and to an application device equipped with the paint spraying device. [Background technology]

[0002] Conventionally, lane markings have been applied to road surfaces using vehicles (trucks, etc.) equipped with an applicator that applies paint for lane markings. Specifically, lane markings are applied by moving the vehicle while spraying molten paint heated to approximately 200°C from an applicator with a spraying mechanism onto the road surface.

[0003] In this case, in the conventional construction of markings, the vehicle travel speed is about 10 km / h at the fastest, and the performance of the coating device is 1 m when traveling at 10 km / h. 2 With a spray capacity of about 3 kg per unit area, it is possible to form markings on the road surface with sufficient precision (uniform and sufficient coating thickness, sufficient clarity of the start and end points, etc.).

[0004] For example, a technology for spraying paint for marking road surfaces from an applicator mounted on a vehicle onto the road surface is disclosed in Patent Document 1 below as a road surface paint applicator.

[0005] Specifically, Patent Document 1 below discloses that a configuration for using a vehicle (truck) to spray paint for marking onto the road surface includes, for example, a generator, a compressor, an LPG cylinder, a melting furnace, etc., as well as a road paint application device (hereinafter simply referred to as the application device) that applies road paint (corresponding to the above-mentioned paint) in lines onto the road surface as the vehicle travels.

[0006] During marking work using this applicator, while paint is being supplied to the paint discharge device (hereafter referred to as the paint spraying device), which corresponds to the spray mechanism, (before the amount of paint supplied reaches a predetermined amount), the control device controls the first receiving plate below the nozzle to receive the relatively small amount of paint sprayed from the paint spraying device. After that, when the amount of paint supplied reaches the predetermined amount, the first receiving plate moves, and the paint sprayed from the paint spraying device is sprayed onto the road surface. This action makes the starting edge of the marking (line) formed on the road surface clear.

[0007] Furthermore, when the supply of paint to the paint spraying device is stopped, the control device controls the second receiving plate to catch any paint remaining in the paint spraying device after the paint supply is stopped. This action makes the end of the marking line on the road surface clearer.

[0008] In this way, Patent Document 1 below describes that the start and end points of the marking lines formed on the road surface by the application device become clear. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2010-100989 A (Patent 4982466) Summary of the Invention [Problem to be solved by the invention]

[0010] As mentioned above, conventional marking work involves the use of vehicles, but the speed at which these vehicles travel is slow, at around 10 km / h at most.

[0011] On the other hand, in recent years, there has been a demand to shorten construction time, quickly reopen construction sites to traffic, and return road conditions to their original state as quickly as possible. To achieve this, the development of technology to speed up construction of marking lines is underway, for example, using high-speed vehicles (high-speed marker vehicles). Specifically, for example, even when traveling at 50 km / h, 2 There is a demand for a coating device that can produce a spray capacity of about 3 kg per unit area.

[0012] However, when the vehicle is traveling at high speed, for example, at a speed of 50 km / h, the coating device described in Patent Document 1 has a coating speed of 1 m 2 Furthermore, when constructing lane markings (one of the dividing lines) that are 8m long and spaced 12m apart at a speed of 50km / h, it is impossible to instantly move each support plate (corresponding to the first and second support plates mentioned above) fixed to an arm member that is supported so that it can rotate around a predetermined axis to the open or closed position at each end of the white line.

[0013] In other words, conventional marking work is carried out while vehicles are traveling at a slow speed of about 10 km / h, and does not address the increased speed of marking work mentioned above. For example, it is not possible to form markings on the road surface with sufficient precision (uniform and sufficient coating thickness, sufficient clarity of the start and end points, etc.) when traveling at a speed of 50 km / h.

[0014] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a paint spraying device that can form marking lines on a road surface with sufficient precision (uniform and sufficient paint thickness, sufficient clarity of the start and end points, etc.) even when the vehicle used to construct the markings is traveling at higher speeds than before, and an application device equipped with this paint spraying device. [Means for solving the problem]

[0015] The paint spraying device of the present invention includes a pair of cylindrical rotors (hereinafter sometimes referred to as "two-axis rotors"), each rotatable about its own axis, consisting of a first rotor and a second rotor, and a paint outlet valve provided in a flow path from a paint inlet to the two-axis rotors. The first rotor is a brush rotor with bristles radially attached to a shaft body, and the second rotor is a gear rotor having a gear shape. The rotational speed of the first rotor is faster than that of the second rotor. The paint that passes through the paint outlet valve by opening and closing the valve falls between the first rotor and the second rotor, whose opposing outer peripheral surfaces rotate downward on their respective axes. The paint that falls by this structure is sprayed onto the road surface by utilizing the centrifugal force of the two-axis rotors.

[0016] The paint spraying device of the present invention can efficiently spray paint in a spray (mist) form both when spraying starts and when spraying stops, while suppressing paint dripping. Therefore, even when the vehicle used to construct markings is traveling at higher speeds than before (for example, even when traveling at 50 km / h), markings can be formed on the road surface with sufficient precision (uniform and sufficient paint thickness, sufficient clarity of the start and end points, etc.).

[0017] In addition, in the paint spraying device of the present invention, the two-axis rotors have a structure in which, when not rotating, the two rotors maintain a predetermined distance and their outer surfaces do not come into contact with each other; the first and second rotors are installed with a distance equal to the change in diameter of the first rotor depending on the rotation speed, so that their outer surfaces come into contact with each other due to the expansion of the brush part of the first rotor due to centrifugal force.

[0018] As a result, when the rotational speed of the first rotor reaches a predetermined speed, the first rotor and the second rotor come into contact, and the centrifugal force between the first rotor and the second rotor and the repulsive force of the bristles of the brush rotor due to the difference in rotational speed of the biaxial rotor act to efficiently spray (mist) paint that has entered the metal brush and paint that has been scraped out by the bristles of the brush rotor. In other words, by forcefully ejecting paint that has entered the metal brush due to the action of centrifugal force, and then cleanly scraping out paint that has entered between the teeth of the gear part with the expanded bristles of the brush rotor, it is possible to eject all paint remaining in the biaxial rotor the moment the paint outlet valve is "closed," and further, paint spraying can be resumed immediately after the paint outlet valve is "opened." This allows the start and end of the marking to be clearly defined without the need for conventional backing plates (first and second backing plates). Furthermore, spraying in a mist (mist) form makes it possible to achieve a uniform coating thickness.

[0019] Furthermore, the paint spraying device of the present invention, together with the paint hopper, constitutes a coating device, and when the coating device is mounted on a vehicle for marking, the rotation speeds of the first and second rotating bodies are determined based on the coating thickness required for the marking and the planned running speed of the vehicle, thereby ensuring a uniform and sufficient coating thickness.

[0020] The paint spraying device according to the present invention further includes a cover that houses the biaxial rotor and forms a paint outlet directly below the biaxial rotor. This allows the biaxial rotor to be housed within the cover, with a small gap between the outer periphery of each rotor and the cover, allowing for axial rotation. Furthermore, by shaping the cover to house the biaxial rotor and form a paint outlet directly below the biaxial rotor, it is possible to prevent paint from dripping when paint spraying is stopped. Furthermore, this is effective in terms of wind protection and preventing paint from scattering when paint is sprayed.

[0021] In the paint spraying device according to the present invention, it is desirable that the positions of the first rotating body and the second rotating body can be suitably interchanged.

[0022] The coating device according to the present invention is characterized by comprising the above-described paint spraying device and a paint hopper that discharges paint into the paint inlet of the paint spraying device. This makes it possible to efficiently spray paint in a spray (mist) form even when spraying starts and stops, while suppressing paint dripping. Therefore, even when a vehicle for marking roads is traveling at higher speeds than before, it is possible to form markings on the road surface with sufficient precision (uniform and sufficient paint thickness, sufficient clarity of the start and end points, etc.). [Effects of the Invention]

[0023] With the paint spraying device and application device of the present invention, it is possible to form marking lines on the road surface with sufficient precision (uniform and sufficient paint thickness, sufficient clarity of the starting and ending points, etc.) even when the vehicle used to construct the marking lines is traveling at higher speeds than before. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic diagram showing the general configuration of a vehicle equipped with a paint spraying device (applicator) according to the present invention. [Figure 2] FIG. 2 is an enlarged view showing a schematic configuration of the coating device according to the present invention. [Figure 3] FIG. 3 is an enlarged view showing a schematic configuration of a paint spraying device according to the present invention. [Figure 4] FIG. 4 is an enlarged view showing a schematic configuration of a paint spraying device according to the present invention. [Figure 5] FIG. 5 is a diagram showing an example of a paint outflow valve in a paint spraying device according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A paint spraying device and a coating device according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] <Configuration> 1A and 1B are schematic diagrams showing the general configuration of a vehicle (high-speed marker vehicle) equipped with a paint spraying device (applicator) according to this embodiment, where (a) is a schematic diagram of the vehicle as seen from above, and (b) is a schematic diagram of the vehicle as seen from the right side. The vehicle 1 used in this embodiment is a vehicle for installing lane markings, and FIG. 1 is a schematic diagram showing the components related to the paint spraying device (applicator) according to this embodiment.

[0027] 2 is an enlarged view showing the general configuration of the coating device of this embodiment, as seen from the right side of the vehicle. In this embodiment, the coating device is arranged on the right side of the vehicle, assuming a right-hand drive vehicle (driving on the left side), but this is not limiting and the coating device may also be arranged on the left side.

[0028] In Figures 1 and 2, the application device 2 of this embodiment mounted on a vehicle 1 is a device that sprays paint for marking onto a road surface, and is equipped with a paint hopper 11 that stores paint supplied from a melting tank via a paint supply device, and a paint spraying device 12 that is a spraying mechanism that sprays the paint stored in the paint hopper 11 onto the road surface.

[0029] The applicator 2 has a structure in which an opening 2a for supplying paint is provided at the top and a paint nozzle 2b (spout 2b of the paint sprayer 12) with dimensions approximately equal to the width of the demarcation line (for example, about 150 mm) is provided at the bottom, and is held by a slide mechanism installed on the loading platform so that the paint nozzle 2b is on the outside of the loading platform (so that it protrudes outward from the right side of the vehicle 1) (see Figure 1(a)). This slide mechanism is installed so that it can move back and forth in the horizontal direction (vehicle width direction) perpendicular to the traveling direction of the vehicle 1, and is used to slide the applicator 2 it holds in the vehicle width direction as needed to fine-tune the paint spray position.

[0030] The paint hopper 11 has a shape in which the paint drop point (see FIG. 2) directly below the paint supply opening 2a provided at the top of the coating device 2 is gently inclined diagonally downward toward the paint spraying device 12. The paint spraying device 12 has a structure for spraying and stopping the paint stored in the paint hopper 11.

[0031] Furthermore, in order to supply paint to be sprayed onto the road surface to paint hopper 11, the loading platform of vehicle 1 is equipped with, for example, a melting pot, which is a tank for melting paint and storing the melted paint, and a paint supply device having a flow path for supplying paint from the melting pot to coating device 2 (paint hopper 11) (see Figures 1 and 2), and furthermore, a distance measuring sensor 2c is installed on top of coating device 2 to measure the distance to the liquid surface of the paint in paint hopper 11 (see Figures 1(b) and 2). The amount of paint supplied (supply amount) from the melting pot to coating device 2 is controlled based on the distance measured by distance measuring sensor 2c.

[0032] The melting pot is fixed in a mounted state on the bed of vehicle 1, and has a paint outlet on its side. The paint supply device has a structure in which one side of the paint flow path is connected to the paint outlet of the melting pot, and the other side (tip side) of the flow path is located directly above opening 2a provided in coating device 2, and the paint flowing along the slope in the flow path within the paint supply device flows down from the tip of the flow path toward opening 2a of coating device 2 (naturally falling into paint hopper 11).

[0033] Regarding the various components (melting tank, etc.) mounted on the vehicle 1 described above, for the sake of convenience of explanation, only the components related to the operation of the paint spraying device 12 (applicator 2) of this embodiment are described, and not all the components and functions required to carry out marking construction are described.

[0034] <Other configurations> In addition to the various components shown in FIG. 1, the loading platform of the vehicle 1 is loaded with and fixed to it, for example, a generator that serves as a power source for the equipment mounted on the loading platform, a compressor that supplies compressed air, an LPG cylinder that serves as a heat source for the melting furnace, and the like (see FIG. 1).

[0035] In addition, although not shown as they are not components related to the applicator 2 (paint sprayer 12) of this embodiment, the vehicle 1 may also be equipped with a cleaning device for cleaning the road markings, a primer sprayer for spraying a primer (adhesive) to improve adhesion of the paint to the road surface, a bead sprayer for spraying beads onto the sprayed paint, a stripper sprayer for spraying a stripper toward the end position of the marking, and a downward camera for capturing images of the road surface including the position where the paint is sprayed by the applicator 2.

[0036] Additionally, a front camera (not shown) that captures images of the road surface ahead in the direction of travel, a guide rod (not shown) that serves as a guide for the driver to drive the vehicle 1 along existing markings, and the like may be attached to the front of the vehicle 1. Images from this front camera and the above-mentioned downward camera are captured as image processing data for making the coating device 2, primer spraying device, bead spraying device, release agent spraying device, etc. follow the markings when the markings are being constructed, and are used to control the above-mentioned slide mechanism.

[0037] <Configuration of paint spraying device> Figures 3 and 4 are enlarged views showing the general configuration of the paint spraying device of this embodiment, where Figure 3(a) is a top view showing the paint spraying device, Figure 3(b) is a front view showing the paint spraying device, and Figures 4(a) and (b) are views showing the A-A' cross section in the front view of Figure 3(b).

[0038] 3 and 4, the paint spraying device 12 includes a first rotor 12a and a second rotor 12b that form a pair of cylindrical rotors (two-axis rotors) that are rotatable about their respective axes, and a paint outlet valve 12e that is provided in a flow path 12d from a paint inlet 12c to the two-axis rotors. The inlet 12c of the paint spraying device 12 is connected to a paint outlet (not shown) provided at the bottom of a paint hopper 11 in the coating device 2 (see FIG. 2).

[0039] The two-axis rotor formed by the first rotor 12a and the second rotor 12b is provided, for example, at a position a predetermined distance (a predetermined fixed distance) away from the road surface, and in the initial state (when the two-axis rotor is not rotating), the rotors are parallel to each other in the horizontal direction (the two rotors are spaced a predetermined distance apart and their outer surfaces are not in contact with each other).

[0040] 4(a) shows the state in which the paint outflow valve 12e is "closed," i.e., the state in which the paint is blocked by the paint outflow valve 12e and does not fall toward the biaxial rotor, and FIG. 4(b) shows the state in which the paint outflow valve 12e is "open," i.e., the state in which the paint passes through the paint outflow valve 12e and falls toward the biaxial rotor. The paint spraying device 12 sprays paint stored in the paint hopper 11 installed above onto the road surface by opening (adjusting the flow rate) the paint outflow valve 12e under control of the control device (see FIG. 1), and stops spraying the paint by closing the paint outflow valve 12e under control of the control device.

[0041] In FIG. 4, the paint outflow valve 12e has a typical two-way valve shape, with two connection ports (an inlet and an outlet) between the flow path 12d and the paint outflow valve 12e, and the flow path 12d can be opened and closed by rotating the shaft. However, the shape of the paint outflow valve 12e is not limited to this, and any shape can be used as long as it has a structure that can control the flow and stop of the paint. For example, the paint outflow valve 12e may be an openable / closable shutter, or a valve with a T-shaped path as shown in FIGS. 5(a) and 5(b). For example, if the paint outflow valve 12e shown in FIG. 5 is used, when the valve is "open," a straight flow path 12d is formed and the paint falls (see FIG. 5(b)). On the other hand, when the valve is "closed" by rotating the shaft, the paint stops falling while being taken into the path within the valve (see FIG. 5(a)). In other words, compared to the valve in Figure 4, the paint can be taken into the valve when the fall stops, and the paint can be stored in the immediate vicinity of the two-axis rotor, so when the valve is later "opened" and the paint starts falling again, the paint can be sprayed more quickly.

[0042] Furthermore, the paint spraying device 12 includes a cover 12f that houses the biaxial rotor formed by the first rotor 12a and the second rotor 12b and forms the paint outlet 2b directly below the biaxial rotor. This allows the biaxial rotor to be rotatably housed within the cover 12f, with a small gap formed between the outer periphery of each rotor and the cover 12f. Furthermore, by shaping the cover 12f to house the biaxial rotor and form the paint outlet 2b directly below the biaxial rotor, it is possible to prevent paint from dripping when paint spraying is stopped. This also provides effective wind protection and paint scattering prevention during paint spraying.

[0043] That is, the paint spraying device 12 configured as described above has a structure in which paint that has passed through the paint outflow valve 12e falls between the first rotating body 12a and the second rotating body 12b, whose opposing outer peripheral surfaces each rotate on an axis in a downward direction, and the paint that has fallen due to this structure is sprayed onto the road surface using the centrifugal force of the two-axis rotating body (see Figures 4(b) and 5(b)).

[0044] The paint spraying device 12 of this embodiment will now be described in more detail. In the paint spraying device 12, the first rotor 12a is a high-density metal brush rotor with metal bristles radially attached to a shaft body, and is axially rotatably supported, for example, on the front side of the cover 12f in the application direction. The second rotor 12b is a gear rotor having a gear shape (a so-called spur gear shape) with tooth traces formed in straight lines parallel to the rotation axis, and is axially rotatably supported, for example, on the rear side of the cover 12f in the application direction. Note that the brush portion of the metal brush rotor can be made more atomizable by increasing the density of the bristles. In this embodiment, the first rotor 12a is made of metal, but this is not limiting. For example, any material may be used as long as it can atomize and spray paint and is heat-resistant to the temperature and frictional heat of the paint. Furthermore, the specifications of the gear rotor, such as tooth shape, tooth pitch, pressure angle, tooth depth, etc., are not particularly limited and can be changed as appropriate depending on the amount of paint sprayed from the two-axis rotor.

[0045] The rotational speeds of the first rotor 12a and the second rotor 12b, whose opposing outer peripheral surfaces rotate downward, are preferably such that the first rotor 12a (metal brush rotor) is rotated faster than the rotational speed of the second rotor 12b (gear rotor), and more preferably the first rotor 12a (metal brush rotor) is rotated at a speed approximately twice as fast as the second rotor 12b (gear rotor). In this embodiment, as an example, when traveling at a speed of 50 km / h, the rotational speed of the first rotor 12a (metal brush rotor) is set to 7000 rpm and the rotational speed of the second rotor 12b (gear rotor) is set to 3500 rpm. This allows paint that has entered the brushes to be efficiently released, so that, for example, when traveling at a speed of 50 km / h, the paint can be efficiently released at a speed of 1 m. 2 While ensuring a spraying capacity of about 3 kg per spray, the paint sprayed from the paint spraying device 12 can be sprayed slightly rearward from directly below the spray outlet 2b.

[0046] As described above, in the initial state (when the biaxial rotors are not rotating), the first rotor 12a and the second rotor 12b in this embodiment maintain a predetermined distance between them and their outer circumferential surfaces are not in contact with each other, but this distance is determined appropriately depending on the rotation speed of the first rotor 12a (metal brush rotor). Specifically, the diameter of the brush portion of the first rotor 12a changes due to expansion caused by centrifugal force, i.e., the diameter increases as the rotation speed increases. Therefore, the first rotor 12a and the second rotor 12b are installed with a distance (gap) equal to the change in the diameter of the first rotor 12a depending on the rotation speed.

[0047] As a result, when the rotational speed of the first rotating body 12a reaches an appropriately determined rotational speed, the first rotating body 12a and the second rotating body 12b come into contact with each other, and the centrifugal force of the first rotating body 12a and the second rotating body 12b and the repulsive force of the bristles of the brush rotating body due to the difference in rotational speed of the two-axis rotating body act to efficiently spray (mist) the paint that has entered the metal brush and the paint that has entered between the teeth of the gear part that is scraped out by the bristles of the brush. In other words, the centrifugal force forcefully ejects paint that has gotten into the metal brush, and the expanded bristles of the brush cleanly scrape out any paint that has gotten between the teeth of the gear. This makes it possible, for example, to eject all of the paint remaining in the two-shaft rotor the moment the paint outflow valve 12e closes (immediately after the paint supply stops), and furthermore, since paint spraying can resume immediately after the paint outflow valve 12e opens, it is possible to clearly mark the beginning and end of the markings without the need for backing plates (first and second backing plates) as in the past. Furthermore, spraying in a spray (mist) form makes it possible to achieve a uniform paint film thickness.

[0048] The rotation speeds of the first and second rotating bodies 12a and 12b are determined appropriately depending on the paint thickness required for the marking lines and the planned travel speed of the vehicle 1. For example, the rotation speeds of the first and second rotating bodies 12a and 12b are determined in advance so that the faster the planned travel speed, the greater the amount of paint sprayed. This ensures a uniform and sufficient paint thickness.

[0049] To rotate the biaxial rotor at the desired rotational speed, the paint sprayer 12 of this embodiment has a pair of meshing gears (in this embodiment, the rotational gear ratio is set to 2 (front side):1 (rear side)) attached to one end of the biaxial rotor (a combination of a first rotor 12a (front side in the application direction) and a second rotor 12b (rear side in the application direction)). Furthermore, a pulley (see FIG. 3) is attached to the gear attached to one end of the first rotor 12a, and the pulley rotates with power from a drive unit (not shown). In other words, the pulley rotates when driven by the drive unit, causing the biaxial rotor to rotate at high speed in the direction of the arrows shown in FIGS. 4(b) and 5(b) (in this embodiment, the rotational speed (rpm) is set to 7000 (front side): 3500 (rear side)).

[0050] <Effects> As described above, the paint spraying device 12 of this embodiment can efficiently spray paint in a spray (mist) form even when spraying starts and stops while suppressing paint dripping, so that lane marking vehicles can form lane markings on the road surface with sufficient accuracy (uniform and sufficient coating thickness, sufficient clarity of the start and end points, etc.) even when traveling at higher speeds than conventional vehicles (for example, at 50 km / h). This embodiment also assumes lane marking using a high-speed marker vehicle, and has described, as an example, a paint spraying device 12 that can form lane markings on the road surface with sufficient accuracy even when traveling at 50 km / h. However, this is not limited to this, and the paint spraying device 12 of this embodiment can also be used when traveling at speeds of 50 km / h or less. In particular, at speeds of 10 km / h or less (low speeds), lane markings can be formed with greater accuracy because the speed is sufficiently slow.

[0051] In this embodiment, as an example, the first rotating body 12a is rotated about its axis at a higher speed than the second rotating body 12b, but this is not limited to this. Depending on the road surface conditions, the required paint thickness of the marking lines, the planned traveling speed of the vehicle 1, etc., the second rotating body 12b may be rotated about its axis at a higher speed than the first rotating body 12a, or the two rotating bodies may be rotated about their axis at the same speed.

[0052] Although not shown, the paint spraying device 12 of this embodiment may be provided with a heater to uniformly heat at least the lower portion of the biaxial rotor.

[0053] In this embodiment, the first rotating body 12a is arranged on the front side in the construction direction, and the second rotating body 12b is arranged on the rear side in the construction direction, but this is not limitative, and the first rotating body 12a and the second rotating body 12b can be switched as appropriate. This makes it possible to spray paint from the paint spraying device 12 slightly forward from directly below the spray nozzle 2b. [Explanation of symbols]

[0054] 1 vehicle 2. Coating equipment 2a opening 2b spout 2c Distance sensor 11 Paint Hopper 12 Paint squirting device 12a First rotating body 12b Second rotating body 12c inlet 12d Flow path 12e Paint Outflow Valve 12f Cover

Claims

1. A paint spraying device comprising a first rotor and a second rotor that form a pair of cylindrical rotors (hereinafter referred to as biaxial rotors) that are rotatable about their respective axes, and a paint outflow valve that is provided in a flow path from a paint inlet to the biaxial rotors, The first rotating body is a brush rotating body having bristles radially planted on a shaft body, and the second rotating body is a gear rotating body having a gear shape, The rotation speed of the first rotating body is set to be higher than the rotation speed of the second rotating body, The paint that passes through the paint outlet valve by opening and closing control falls between the first rotor and the second rotor, whose opposing outer circumferential surfaces rotate about their axes downwards, and the paint that falls by this structure is sprayed onto the road surface by utilizing the centrifugal force of the two-axis rotor. A paint spraying device characterized by:

2. The two-shaft rotor has a structure in which the two rotors maintain a predetermined distance between them when not rotating, and their outer circumferential surfaces do not come into contact with each other, the first rotor and the second rotor are installed with a gap corresponding to a change in diameter of the first rotor depending on the rotation speed so that their outer circumferential surfaces come into contact with each other due to expansion of the brush portion of the first rotor caused by centrifugal force; 2. The paint spraying device according to claim 1.

3. A coating device is configured together with a paint hopper that stores paint and releases the paint into the paint inlet, and the coating device is mounted on a vehicle for marking construction, determining the rotation speeds of the first rotating body and the second rotating body based on a coating thickness required as a marking line and a planned running speed of the vehicle; 3. A paint spraying device according to claim 2.

4. a cover portion that houses the two-shaft rotor and forms a paint ejection port directly below the two-shaft rotor; Further provided with 4. A paint spraying device according to claim 3.

5. The positions of the first rotating body and the second rotating body can be appropriately interchanged.

5. A paint spraying device according to claim 4.

6. A paint spraying device according to any one of claims 1 to 5; a paint hopper for storing paint and discharging the paint to the paint inlet of the paint spraying device; A coating device comprising:

Images