Painting apparatus

Abstract

The present invention relates to a painting apparatus comprising: a carriage unit; traveling wheels that are provided on the carriage unit and can roll along a region to be painted; a driving source that provides a driving force for rotating the traveling wheels; a first painting roller that is rotatably provided on the carriage unit and paints the region to be painted; a paint supply unit that is arranged in the carriage unit and supplies paint to the first painting roller; and a power transmission unit that connects the driving source and the first painting roller and transmits the driving force from the driving source to the first painting roller. Since both the traveling wheels and the first painting roller are rotated by the driving source, it is possible to achieve the advantageous effects of a simplified structure and improved painting quality.

Description

Painting device

[0001] An embodiment of the present invention relates to a coating device, and more specifically, to a coating device capable of improving coating efficiency and coating quality.

[0002] Architectural paints are applied to parking lot floors, factory floors, etc., for purposes such as dustproofing, waterproofing, and design characteristics (aesthetics).

[0003] Generally, the paint application process can be performed by a worker manually rolling a paint-laden roller over the surface of the object to be coated.

[0004] However, there is a problem in that performing painting processes for extensive areas, such as parking lot floors or factory floors, manually requires a significant amount of time and manpower to complete the work.

[0005] Accordingly, a method has been proposed in which rollers are mounted on a trolley capable of autonomously moving across the surface to be painted, and the painting process is performed while moving the trolley.

[0006] However, conventionally, since the painting process is performed by the roller simply rolling along the surface to be painted due to the frictional force between the roller and the surface to be painted during the operation of the bogie, there is a problem in that it is difficult to ensure painting efficiency and painting quality.

[0007] In particular, in the past, there was a problem in that the painting efficiency was reduced and the time required for the painting process increased because the roller had to repeatedly roll over the surface to be painted in order to secure a sufficient thickness and a beautiful appearance of the paint layer.

[0008] Accordingly, various studies have recently been conducted to improve coating efficiency and coating quality, but they are still insufficient, and further development is required.

[0009] The embodiment of the present invention aims to provide a coating device capable of improving coating efficiency and coating quality.

[0010] In particular, the embodiment of the present invention aims to enable the coating roller to rotate together with the driving (rotation) of the driving wheel, thereby performing a coating process on the workpiece.

[0011] In addition, the embodiments of the present invention aim to minimize the time required for the painting process and to form a beautiful painted appearance.

[0012] In addition, the embodiments of the present invention aim to simplify the structure of the painting device, contribute to miniaturization and weight reduction, and enable cost reduction.

[0013] The problems intended to be solved in the embodiments are not limited thereto, and may also include objectives or effects that can be identified from the means of solving the problems or the embodiments described below.

[0014] According to a preferred embodiment of the present invention for achieving the aforementioned objectives of the present invention, a painting device comprises a bogie, a driving wheel provided on the bogie so as to be rolling along a part to be painted, a driving source providing a driving force to rotate the driving wheel, a first painting roller rotatably provided on the bogie and painting a part to be painted, a paint supply unit provided on the bogie and supplying paint to the first painting roller, and a power transmission unit connecting the driving source and the first painting roller and transmitting the driving force of the driving source to the first painting roller, wherein the driving wheel and the first painting roller are each rotated by the driving source.

[0015] This is intended to improve the painting quality and painting efficiency of the painting equipment.

[0016] In other words, conventionally, the painting process is performed by the roller simply rolling along the surface to be painted due to the friction between the part to be painted and the roller during the operation of the bogie, which makes it difficult to ensure painting efficiency and quality.

[0017] In particular, in order to secure a sufficient thickness and a beautiful appearance of the paint layer, the roller must repeatedly roll over the workpiece, which leads to reduced painting efficiency and increased time required for the painting process.

[0018] However, in an embodiment of the present invention, by causing the first coating roller to rotate together with the driving source that rotates the driving wheel via a power transmission unit, an advantageous effect of improving coating efficiency and coating quality can be obtained.

[0019] Above all, in the embodiment of the present invention, the first painting roller does not roll along the area to be painted, but rather rotates on its own relative to the bogie in conjunction with the driving (rotation) of the driving wheel to perform the painting process on the area to be painted, thereby improving painting efficiency and obtaining the advantageous effect of shortening the time required for the painting process.

[0020]

[0021] Meanwhile, although it is possible to perform a painting process on the workpiece by providing a separate driving source to rotate the painting roller and rotating the painting roller itself, there is a problem in that the structure of the painting device becomes complex and the design freedom and space utilization are reduced because a separate driving source must be provided to rotate the painting roller.

[0022] However, the embodiment of the present invention does not provide a driving source for driving the driving wheel and a driving source for rotating the first painting roller separately, but rather allows the driving wheel and the first painting roller to rotate together by a single driving source via a power transmission unit, thereby simplifying the structure and obtaining the advantageous effect of improving space utilization and design freedom.

[0023]

[0024] The power transmission unit can be provided with various structures capable of transmitting the driving force of the driving source to the first painting roller.

[0025] According to a preferred embodiment of the present invention, the power transmission unit may include a first pulley that rotates by a driving source, a second pulley connected to a first coating roller, and a power transmission member that transmits the rotational force of the first pulley to the second pulley.

[0026]

[0027] As a power transmission member, various members capable of transmitting the rotational force of the first pulley to the second pulley may be used.

[0028] According to a preferred embodiment of the present invention, a belt may be used as a power transmission member.

[0029]

[0030] The movement path (circulation path) of the power transmission member may be varied according to required conditions and design specifications, and the present invention is not limited or restricted by the movement path of the power transmission member.

[0031] According to a preferred embodiment of the present invention, the power transmission member can transmit the rotational force of the first pulley to the second pulley so that the second pulley rotates in the same direction as the rotational direction of the first pulley.

[0032] According to another preferred embodiment of the present invention, the power transmission member can transmit the rotational force of the first pulley to the second pulley so that the second pulley rotates in the opposite direction to the rotational direction of the first pulley.

[0033]

[0034] The rotation ratio of the first roller and the second roller can be varied depending on the required conditions and design specifications.

[0035] According to a preferred embodiment of the present invention, the first pulley and the second pulley may be defined to have different rotation ratios.

[0036]

[0037] According to a preferred embodiment of the present invention, the painting device may include a second painting roller that is rotatably provided on a bogie and paints a part to be painted individually with a first painting roller.

[0038] According to a preferred embodiment of the present invention, the second coating roller may be configured to rotate (roll over the area to be coated) based on the frictional force with the area to be coated caused by the driving force of the bogie during the driving of the bogie, and to coat the area to be coated.

[0039] In this way, the embodiment of the present invention enables a coating process on a surface to be coated to be performed by a first coating roller that rotates on its own relative to the bogie, and a second coating roller that rotates (rolls and moves the surface to be coated) based on the frictional force with the surface to be coated caused by the driving force of the bogie, thereby obtaining the advantageous effect of improving coating efficiency while securing a sufficient thickness of the coating layer and a beautiful appearance.

[0040] As described above, according to an embodiment of the present invention, an advantageous effect of improving coating efficiency and coating quality can be obtained.

[0041] In particular, according to an embodiment of the present invention, by having a painting roller rotate together with a driving source that provides driving force to a driving wheel in conjunction with the driving (rotation) of the driving wheel and performing a painting process on a workpiece, an advantageous effect of improving painting efficiency and painting quality can be obtained.

[0042] In addition, according to an embodiment of the present invention, the time required for the painting process can be minimized, and the advantageous effect of forming a beautiful painted appearance can be obtained.

[0043] In addition, according to an embodiment of the present invention, the structure of the coating device can be simplified, contributing to miniaturization and weight reduction, and advantageous effects such as cost reduction can be obtained.

[0044] FIG. 1 is a drawing for explaining a coating device according to an embodiment of the present invention.

[0045] FIG. 2 is a drawing for explaining a painting roller and a power transmission unit as a painting device according to an embodiment of the present invention.

[0046] FIG. 3 is a drawing for explaining a modified example of a power transmission unit as a painting device according to an embodiment of the present invention.

[0047] FIG. 4 is a drawing for explaining a modified example of a coating device according to an embodiment of the present invention.

[0048] FIG. 5 is a drawing for explaining a paint supply unit as a coating device according to an embodiment of the present invention.

[0049] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0050] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0051] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0052] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0053] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C.

[0054] In addition, terms such as first, second, A, B, (a), (b), etc. may be used when describing the components of the embodiments of the present invention.

[0055] These terms are intended merely to distinguish a component from other components and are not limited by the essence, order, sequence, etc. of the component.

[0056] And, where it is stated that a component is 'connected', 'combined', or 'connected' to another component, this may include not only cases where the component is directly connected, combined, or connected to the other component, but also cases where it is 'connected', 'combined', or 'connected' due to another component located between the component and the other component.

[0057] Furthermore, when described as being formed or placed "above or below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above or below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0058]

[0059] Referring to FIGS. 1 to 5, a painting device (10) according to an embodiment of the present invention comprises a bogie (110), a driving wheel (120) provided on the bogie (110) to be rolling along a part to be painted, a driving source (130) providing a driving force to rotate the driving wheel (120), a first painting roller (210) rotatably provided on the bogie (110) to paint a part to be painted, a paint supply unit (140) provided on the bogie (110) to supply paint to the first painting roller (210), and a power transmission unit (300) connecting the driving source (130) and the first painting roller (210) and transmitting the driving force of the driving source (130) to the first painting roller (210), wherein the driving wheel (120) and the first painting roller (210) are each rotated by the driving source (130).

[0060] For reference, the coating device (10) according to the embodiment of the present invention may be used to apply paint to various parts to be coated according to required conditions and design specifications, and the present invention is not limited or restricted by the type and characteristics of the parts to be coated.

[0061]

[0062] Referring to FIGS. 1 and 2, the bogie (110) is configured to drive (e.g., autonomous driving) the painted area via a driving wheel (120).

[0063] The bogie part (110) may be provided in various structures according to required conditions and design specifications, and the present invention is not limited or restricted by the structure and shape of the bogie part (110).

[0064] For example, the bogie section (110) may be formed to have a roughly square frame structure, and on the bogie section (110), a paint storage section (not shown) in which paint used in the painting process is stored, an electrical section (not shown) including electronic equipment necessary for the operation or calculation of each part of the painting device (10) may be provided.

[0065]

[0066] The driving wheel (120) is rotatably mounted on the bogie (110) so as to be driven along the painted area.

[0067] Here, the statement that the driving wheel (120) travels along the painted area can be understood as the driving wheel (120) rotating relative to the bogie (110) and rolling along the painted area.

[0068] The driving wheel (120) may be provided with various structures capable of driving depending on the painted area, and the present invention is not limited or restricted by the structure and shape of the driving wheel (120).

[0069] For example, the driving wheel (120) may be formed to have a roughly circular wheel shape. According to another embodiment of the present invention, it is also possible to form the driving wheel in a roller shape, a spherical shape, or other shapes.

[0070]

[0071] According to a preferred embodiment of the present invention, a plurality of driving wheels (120) may be provided on the bogie (110) at a predetermined interval, and the plurality of driving wheels (120) may support the bogie (110) so as to be drivable in a cooperative manner.

[0072] The number and size of the driving wheels (120) may vary depending on the required conditions and design specifications, and the present invention is not limited or restricted by the number and size of the driving wheels (120).

[0073] In the following, an example will be described in which a driving wheel (120) is provided at the front and rear ends of the bogie part (110), respectively. According to another embodiment of the present invention, it is also possible to provide a driving wheel at the central part or other parts of the bogie part.

[0074]

[0075] A driving source (130) is provided in the bogie (110) to provide driving force for driving (rotating) the driving wheel (120).

[0076] As the driving source (130), a conventional driving source (130), such as a motor, may be used, and the present invention is not limited or restricted by the type and structure of the driving source (130).

[0077] Hereinafter, an example will be described in which a driving source (130) is provided non-axially with respect to a driving wheel (120), and the driving force of the driving source (130) is transmitted to the driving wheel (120) via a pulley (e.g., a first pulley) and a conventional power transmission means (e.g., a chain or a belt). According to another embodiment of the present invention, it is also possible to configure the driving force of the driving source to be transmitted directly to the driving wheel.

[0078]

[0079] According to a preferred embodiment of the present invention, the painting device (10) may include a paint storage unit (140) and a paint supply unit (150) provided on a trolley unit (110) for storing paint and supplying paint to a first painting roller (210) and a second painting roller (220), respectively.

[0080] The paint supply unit (150) may be provided in various structures capable of continuously supplying paint stored in the paint storage unit (140) to the first painting roller (210) and the second painting roller (220), and the present invention is not limited or restricted by the structure of the paint supply unit (150).

[0081] For example, referring to FIG. 5, the paint supply unit (150) may include a first supply line (152) provided inside the first painting roller (210) and the second painting roller (220), and a second supply line (154) provided in the first painting roller (210) and the second painting roller (220) such that one end is connected to the first supply line (152) and the other end is exposed to the first painting roller (210) and the second painting roller (220).

[0082] Preferably, the first supply line (152) may be continuously formed inside the driving wheel (130) along the axial direction of the first coating roller (210) and the second coating roller (220), and a plurality of second supply lines (154) may be provided spaced apart along the length direction of the first supply line (152).

[0083] For reference, the amount of paint supplied by the paint supply unit (150) can be varied depending on the driving speed of the driving wheel (130) and the characteristics of the paint, and the present invention is not limited or restricted by the amount of paint supplied by the paint supply unit (150).

[0084]

[0085] The first painting roller (210) is rotatably provided on the trolley (110) to paint the area to be painted.

[0086] Here, the first coating roller (210) coating the area to be coated is defined as applying the paint supplied to the first coating roller (210) to the area to be coated.

[0087] The first coating roller (210) may be provided with various structures capable of applying paint to the surface to be coated, and the present invention is not limited or restricted by the structure of the first coating roller (210).

[0088] For example, the first coating roller (210) may include a roller body (not shown) rotatably provided on a bogie (110), and a mohair (not shown) provided to cover the outer surface of the roller body and to apply paint to the surface to be coated.

[0089] For example, the roller body may be formed in the shape of a cylinder having a circular cross-section and may be provided with a length corresponding to the width of the bogie part (110) (width along a direction perpendicular to the driving direction of the bogie part).

[0090]

[0091] The mohair is provided to cover the entire outer surface of the roller body, and when the first coating roller (210) rotates, the paint on the mohair can be applied to the coating part.

[0092] Mohair can be formed from various materials capable of absorbing paint, and the present invention is not limited or restricted by the material and characteristics of the mohair.

[0093] For example, it can be formed from a conventional synthetic resin or fiber to which paint can be applied.

[0094]

[0095] The number and size of the first coating roller (210) may vary depending on the required conditions and design specifications, and the present invention is not limited or restricted by the number and size of the first coating roller (210).

[0096] Hereinafter, an example in which only one first painting roller (210) is provided on the bogie part (110) will be described. According to another embodiment of the present invention, it is also possible to provide two or more first painting rollers on the bogie part.

[0097]

[0098] The power transmission unit (300) connects the driving source (130) and the first painting roller (210) and is configured to transmit the driving force of the driving source (130) to the first painting roller (210).

[0099] The power transmission unit (300) may be provided in various structures capable of transmitting the driving force of the driving source (130) to the first painting roller (210), and the present invention is not limited or restricted by the type and structure of the power transmission unit (300).

[0100] According to a preferred embodiment of the present invention, the power transmission unit (300) may include a first pulley (310) that rotates by a driving source (130), a second pulley (320) connected to a first coating roller (210), and a power transmission member (330) that transmits the rotational force of the first pulley (310) to the second pulley (320).

[0101]

[0102] As the first pulley (310), various pulleys capable of rotating by the rotational force of the driving source (130) may be used, and the present invention is not limited or restricted by the type and structure of the first pulley (310).

[0103] For example, the first pulley (310) can be directly connected to the rotational shaft of the driving source (130) (e.g., a motor). Alternatively, it is also possible to configure the driving force of the driving source (130) to be transmitted to the first pulley (310) via a gear or the like.

[0104]

[0105] The second pulley (320) is connected to the first painting roller (210) so as to be rotatable together with the first painting roller (210), and can define the circulation path of the power transmission member (330) in cooperation with the first pulley (310).

[0106]

[0107] The power transmission member (330) is configured to rotate in an infinite loop manner along a circular path defined by the first pulley (310) and the second pulley (320) and to transmit the rotational force of the first pulley (310) to the second pulley (320).

[0108] Various types of members capable of transmitting the rotational force of the first pulley (310) to the second pulley (320) may be used as the power transmission member (330), and the present invention is not limited or restricted by the type and structure of the power transmission member (330).

[0109] According to a preferred embodiment of the present invention, a belt (or chain) may be used as the power transmission member (330).

[0110]

[0111] *

[0112] The movement path (circulation path) of the power transmission member (330) can be varied according to the required conditions and design specifications, and the present invention is not limited or restricted by the movement path of the power transmission member (330).

[0113] For example, referring to FIG. 2, the power transmission member (330) can transmit the rotational force of the first pulley (310) to the second pulley (320) so that the second pulley (320) rotates in the same direction as the rotational direction of the first pulley (310).

[0114] For example, the power transmission member (330) may be configured to rotate in a circular motion along a roughly ring-shaped path, and the first pulley (310) and the second pulley (320) connected to the power transmission member (330) may rotate in a counterclockwise direction (based on FIG. 2), so that the first coating roller (210) may rotate in the same direction as the driving wheel (120).

[0115]

[0116] As another example, referring to FIG. 3, the power transmission member (300') can transmit the rotational force of the first pulley (310) to the second pulley (320) so that the second pulley (320) rotates in the opposite direction to the rotational direction of the first pulley (310).

[0117] For example, the power transmission member (300') can be configured to rotate in a circular path in the shape of an 'X' ring, and the first pulley (310) connected to the power transmission member (300') rotates counterclockwise (based on FIG. 3), and the second pulley (320) connected to the power transmission member (300') rotates clockwise (based on FIG. 3), so that the first coating roller (210) can rotate in the opposite direction to the driving wheel (120).

[0118]

[0119] Meanwhile, the rotation ratio of the first roller and the second roller may vary depending on the required conditions and design specifications, and the present invention is not limited or restricted by the rotation ratio of the first roller and the second roller.

[0120] According to a preferred embodiment of the present invention, the first pulley (310) and the second pulley (320) may be defined to have different rotation ratios. For example, the second pulley (320) may be defined to have a higher rotation ratio than the first pulley (310).

[0121] According to another embodiment of the present invention, it is possible to configure the first pulley and the second pulley to have the same rotation ratio, or to configure the second pulley to have a lower rotation ratio than the first pulley.

[0122]

[0123] Referring to FIG. 1, according to a preferred embodiment of the present invention, the painting device (10) may include a first painting roller (210) and a second painting roller (220) that paints the area to be painted individually, which is rotatably provided on a bogie (110).

[0124] The second coating roller (220) is provided to coat the area to be coated in cooperation with the first coating roller (210).

[0125] According to a preferred embodiment of the present invention, the second coating roller (220) may be configured to rotate (roll and move the coating area) based on the frictional force with the coating area caused by the driving force of the bogie (110) when the bogie (110) is traveling, and to coat the coating area.

[0126] The second coating roller (220) may be provided with various structures capable of rolling over the area to be coated and applying paint to the area to be coated, and the present invention is not limited or restricted by the structure of the second coating roller (220).

[0127] For example, the second coating roller (220) may include a roller body (not shown) rotatably provided on the bogie (110), and a mohair (not shown) provided to cover the outer surface of the roller body and to apply paint to the surface to be coated.

[0128] Hereinafter, an example will be described in which the second coating roller (220) is formed with the same or similar structure as the first coating roller (210) described above.

[0129]

[0130] The number and size of the second coating roller (220) may vary depending on the required conditions and design specifications, and the present invention is not limited or restricted by the number and size of the second coating roller (220).

[0131] Hereinafter, an example in which two second painting rollers (220) are provided in the bogie section (110) will be described. As an example, in the bogie section (110), a second painting roller (220) may be provided upstream and downstream of the first painting roller (210), respectively, with the first painting roller (210) in between.

[0132] In the embodiments of the present invention described above, the first coating roller (210) is positioned between the second coating roller (220) and the first coating roller (210), with the second coating roller (220) provided upstream (left side of the first coating roller in Fig. 1) and downstream (right side of the first coating roller in Fig. 1), respectively. However, according to other embodiments of the present invention, it is possible to provide the second coating roller only upstream of the first coating roller or to provide the second coating roller only downstream of the second coating roller.

[0133] Alternatively, it is possible to provide only one second painting roller on the bogie, or to provide three or more second painting rollers on the bogie.

[0134] In this way, the embodiment of the present invention enables a coating process on a coating area to be coated by means of a first coating roller (210) that rotates on its own relative to the bogie (110) and a second coating roller (220) that rotates (rolls and moves the coating area) based on the frictional force with the coating area caused by the driving force of the bogie (110), thereby obtaining an advantageous effect of improving coating efficiency while securing a sufficient thickness of the coating layer and a beautiful appearance.

[0135] Above all, the embodiment of the present invention makes it possible to improve the design characteristics of the coating layer and form a beautiful appearance of the coating layer by using the first coating roller (210) and the second coating roller (220), which rotate in different ways, together to perform a coating process on the coating area. For example, it is possible to perform blending coating (or blending coating) on ​​the coating area using the first coating roller (210) and the second coating roller (220).

[0136]

[0137] Meanwhile, in the embodiments of the present invention described above, the first pulley (310) and the driving wheel (120) are provided non-axially, but according to another embodiment of the present invention, as shown in FIG. 4, the first pulley (310) is rotatably connected integrally to the driving wheel (120), and the driving source (130) is directly connected to the first pulley (310).

[0138]

[0139] Although the invention has been described above with reference to embodiments, this is merely illustrative and does not limit the invention. Those skilled in the art will understand that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the embodiments. For example, each component specifically shown in the embodiments may be modified and implemented. Furthermore, differences related to such modifications and applications should be interpreted as being included within the scope of the invention as defined in the appended claims.

[0140]

[0141] Explanation of the symbols

[0142] 10: Painting device

[0143] 110 : Loan section

[0144] 120 : Driving wheel

[0145] 130 : Drive source

[0146] 140 : Paint storage unit

[0147] 150 : Paint supply unit

[0148] 210 : 1st coating roller

[0149] 220 : 2nd coating roller

[0150] 300 : Power transmission unit

[0151] 310 : 1st Pulley

[0152] 320 : Second pulley

[0153] 330,330' : Power transmission member

Claims

1. Loan section; A driving wheel provided on the above-mentioned bogie so as to be able to move along the painted area; A driving source that provides driving force for rotating the above driving wheel; A first painting roller rotatably provided on the above-mentioned bogie and for painting the above-mentioned area to be painted; A paint supply unit provided in the above-mentioned trolley and supplying paint to the above-mentioned first painting roller; and A power transmission unit that connects the driving source and the first painting roller and transmits the driving force of the driving source to the first painting roller; is included. A painting device in which the driving wheel and the first painting roller each rotate by the above driving source.

2. In Paragraph 1, The above power transmission unit is, A first pulley that rotates by the above driving source; A second pulley connected to the first coating roller; and A power transmission member that transmits the rotational force of the first pulley to the second pulley; A coating device including 3. In Paragraph 2, The above power transmission member is a painting device that transmits the rotational force so that the second pulley rotates in the same direction as the rotational direction of the first pulley.

4. In Paragraph 2, The above power transmission member is a painting device that transmits rotational force so that the second pulley rotates in the opposite direction to the rotational direction of the first pulley.

5. In Paragraph 2, The above power transmission member is a painting device including a belt.

6. In Paragraph 2, A painting device in which the first pulley and the second pulley are defined to have different rotation ratios.

7. In Paragraph 1, A painting device comprising a second painting roller that is rotatably provided on the above-mentioned bogie and paints the area to be painted separately from the first painting roller.

8. In Paragraph 7, The above second painting roller rotates based on the frictional force with the area to be painted during the movement of the above bogie, and is a painting device that paints the area to be painted.

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