Road surface construction device and road surface construction method

Abstract

A road surface construction device 1 to be used for applying a surface treatment mixture to a road surface includes: a body part 10 having a rectangular frame shape; and a brush part 40 provided in the body part 10. The body part 10 includes two first plate members 20a, 20b arranged along a first direction, and two second plate members 20c, 20d intersecting with the first plate members 20a, 20b and arranged along a second direction. The brush part 40 includes a plurality of linear members 41 and a holding part 42 for holding the linear members 41. The linear members 41 protrude from a lower end of the body part 10, and the brush part 40 includes first brush parts 40a, 40b provided on the first plate members 20a, 20b.

Description

Road surface construction device and road surface construction method

[0001] The present invention relates to a road surface construction device used to apply a surface treatment mixture or the like to a road surface such as a road pavement, and a road surface construction method using the road surface construction device.

[0002] Pavement surfaces such as asphalt and concrete pavements are generally subjected to the direct load of traffic and are exposed to rain, ultraviolet rays, etc., which causes deterioration such as roughness and cracks to form on the surface, and this deterioration gradually progresses inward, eventually leading to failure. Preventive maintenance methods are used to prevent such damage caused by deterioration and to maintain the pavement by carrying out appropriate repairs.

[0003] As such a preventive maintenance method, a surface treatment method using a surface treatment mixture is generally known. For example, Patent Document 1 discloses a truck-mounted construction device equipped with a tank, a mixer, and a spreader box as a device for spreading and leveling a cold slurry agent mainly composed of asphalt mortar on a road surface.

[0004] Japanese Patent Application Laid-Open No. 2000-027105

[0005] Preventive maintenance methods aimed at maintaining existing pavements are required to be able to be carried out at low cost. However, to carry out surface treatment using the above-mentioned application device, it is necessary to apply the surface treatment mixture to a certain thickness or more, which poses a problem of requiring a large amount of material and increasing costs. On the other hand, if an attempt is made to apply the surface treatment mixture thinly using the above-mentioned application device, the thickness of the surface treatment layer will be uneven, resulting in a problem of poor pavement quality. The problem that the present invention aims to solve is to provide a road surface application device that enables the application of the surface treatment mixture to a thin, uniform thickness.

[0006] [1] According to aspect 1 of the present invention, there is provided a road surface construction device comprising a main body having a rectangular frame shape and a brush portion provided on the main body, wherein the main body includes two first plate-shaped members arranged along a first direction and two second plate-shaped members arranged along a second direction, intersecting the first plate-shaped members, the brush portion comprising a plurality of linear members and a holding portion that holds the linear members, the linear members protruding from the lower end of the main body, and the brush portion including a first brush portion provided on the first plate-shaped member.

[0007] [2] According to a second aspect of the present invention, there is provided the road surface construction device of the first aspect, wherein the brush section includes a second brush section provided on the second plate-like member.

[0008] [3] According to aspect 3 of the present invention, there is provided a road surface construction device of aspect 1 or 2, wherein the main body portion comprises a third plate-shaped member between the two first plate-shaped members, connected to the two second plate-shaped members and arranged along the first direction, and the brush portion includes a third brush portion arranged on the third plate-shaped member.

[0009] [4] According to aspect 4 of the present invention, there is provided a road surface construction device of any of aspects 1 to 3, wherein the main body portion comprises a first auxiliary member provided on the first plate-shaped member, and the linear member of the first brush portion is sandwiched between the first plate-shaped member and the first auxiliary member.

[0010] [5] According to aspect 5 of the present invention, there is provided a road surface construction device of aspect 2, in which the main body portion is provided with a second auxiliary member provided on the second plate-shaped member, and the linear member of the second brush portion is sandwiched between the second plate-shaped member and the second auxiliary member.

[0011] [6] According to aspect 6 of the present invention, there is provided a road surface construction device of aspect 3, in which the main body portion is provided with a third auxiliary member provided on the third plate-shaped member, and the linear member of the third brush portion is sandwiched between the third plate-shaped member and the third auxiliary member.

[0012] [7] According to aspect 7 of the present invention, there is provided a road surface construction device of aspect 5, in which the lower end of the second auxiliary member is positioned lower in the vertical direction than the lower end of the second plate-shaped member.

[0013] [8] According to aspect 8 of the present invention, there is provided a road surface construction device of aspect 5 or 7, wherein the second auxiliary member is provided with a plate-shaped protrusion portion protruding from an end portion in the longitudinal direction of the second auxiliary member.

[0014] [9] According to a ninth aspect of the present invention, there is provided the road surface construction device of the eighth aspect, wherein the protrusion has a curved shape.

[0015]

[10] According to a tenth aspect of the present invention, there is provided the road surface construction device of any one of the first to ninth aspects, wherein the linear members have a protruding length from the main body of 5 to 50 mm.

[0016]

[11] According to aspect 11 of the present invention, there is provided a road surface construction method using the road surface construction device of any of aspects 1 to 10, comprising: a preparation step of placing a surface treatment mixture inside the main body; and an application step of towing the road surface construction device and applying the surface treatment mixture onto the road surface.

[0017]

[12] According to aspect 12 of the present invention, there is provided the road surface construction method of aspect 11, wherein the application step includes applying a brush finish to the surface of the surface treatment mixture using the brush unit.

[0018] The road surface construction device of the present invention makes it possible to apply the surface treatment mixture thinly and uniformly.

[0019] FIG. 1 is a perspective view showing the overall configuration of a road surface construction device in an embodiment of the present invention. FIG. 2 is a plan view of a road surface construction device in an embodiment of the present invention. FIG. 3 is a bottom view of a road surface construction device in an embodiment of the present invention. FIG. 4(a) is a cross-sectional view taken along line IVa-IVa in FIG. 2, and FIG. 4(b) is a cross-sectional view taken along line IVb-IVb in FIG. 2. FIG. 5 is a side view of a road surface construction device in an embodiment of the present invention. FIG. 6 is a diagram showing the configuration of a brush unit in an embodiment of the present invention. FIG. 7 is a cross-sectional view showing a preparation step in a road surface construction method using a road surface construction device in an embodiment of the present invention. FIG. 8 is a cross-sectional view showing an application step in a road surface construction method using a road surface construction device in an embodiment of the present invention.

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0021] FIG. 1 is a perspective view showing the overall configuration of a road surface construction device 1 in this embodiment, FIG. 2 is a plan view of the road surface construction device 1 in this embodiment, and FIG. 3 is a bottom view of the road surface construction device 1 in this embodiment.

[0022] The road surface construction device 1 in this embodiment is an apparatus used to apply a surface treatment mixture containing a mortar material to a pavement surface such as an asphalt pavement or a concrete pavement to form a thin surface treatment layer. Examples of the surface treatment mixture include a mixture of a mortar material containing cement and aggregate with a polymer emulsion (polymer cement mortar). Examples of cement include Portland cement, blended cement, and ecocement. Examples of polymer emulsions include emulsions of acrylic polymers, emulsions of vinyl acetate polymers, emulsions of butadiene polymers, and emulsions of natural rubber. The surface treatment mixture may further contain additives commonly used in pavement surfaces, such as a curing accelerator, a fluidizer, an antifoaming agent, a retarder, a filler, vegetable fibers, and a pigment.

[0023] When the surface treatment mixture is applied to the pavement surface, the polymer emulsion reacts with the mortar material, causing a hardening reaction, and a surface treatment layer with excellent adhesion and durability is formed on the pavement surface.

[0024] As shown in Figures 1 to 3, the road surface construction device 1 in this embodiment comprises a main body (device main body) 10 having a rectangular frame shape and multiple brush units 40a to 40e. The main body 10 includes a bottom opening 11, an upper opening 12, a front plate 20a, a rear plate 20b, side plates 20c and 20d, and a partition plate 20e. The brush units 40a to 40e are attached to the front plate 20a, the rear plate 20b, the side plates 20c and 20d, and the partition plate 20e, respectively. Hereinafter, the front plate 20a, the rear plate 20b, the side plates 20c and 20d, and the partition plate 20e will be collectively referred to simply as plate members 20. The brush units 40a to 40e will also be collectively referred to simply as brush units 40. The main body portion 10 in this embodiment corresponds to an example of a "main body portion" in the aspects of the present invention, the brush portion 40 in this embodiment corresponds to an example of a "brush portion" in the aspects of the present invention, the brush portions 40a and 40b in this embodiment correspond to an example of a "first brush portion" in the aspects of the present invention, the brush portions 40c and 40d in this embodiment correspond to an example of a "second brush portion" in the aspects of the present invention, and the brush portion 40e in this embodiment corresponds to an example of a "third brush portion" in the aspects of the present invention.

[0025] The main body 10 includes a towing unit 13 attached to the front plate 20a. As will be described later, the road surface construction device 1 in this embodiment is placed on the road surface, and is used by holding and towing the towing unit 13 with the surface treatment mixture disposed inside the main body 10 through the top opening 12. By towing the road surface construction device 1, the surface treatment mixture disposed inside the main body 10 is sent out through the bottom opening 11 and the gap between the main body 10 and the road surface to the rear of the road surface construction device 1. As will be described later in detail, the brush unit 40 slides over the road surface and the surface treatment mixture, applying the surface treatment mixture to the road surface and spreading it to a uniform thickness, and also applying a brush finish to the surface of the surface treatment mixture. In this embodiment, the towing unit 13 is composed of two rod-shaped members and rotatably attached to the front plate 20a, but the configuration of the towing unit 13 is not particularly limited thereto.

[0026] The material constituting the plate member 20 is not particularly limited, but metal materials such as iron plate and steel can be used. The thickness of the plate member 20 is preferably 2 to 9 mm, more preferably 3 to 6 mm. The front plate 20a and the rear plate 20b are arranged substantially parallel to each other along the X direction in the figure, and the side plates 20c and 20d are arranged substantially parallel to each other along the Y direction, intersecting the front plate 20a and the rear plate 20b. In other words, the front plate 20a, the rear plate 20b, and the side plates 20c and 20d form the rectangular frame shape of the main body 10. In this embodiment, the longitudinal lengths of the front plate 20a and the rear plate 20b are longer than the longitudinal lengths of the side plates 20c and 20d, but this is not particularly limited, and the side plates 20c and 20d may be longer than the front plate 20a and the rear plate 20b.

[0027] Although not particularly limited, a plate-shaped thickness adjusting portion 21 is provided on the lower (lower in the Z direction) side surface of the plate member 20 (see FIGS. 4( a) and 4(b)). The thickness adjusting portion 21 can be made of the same material as the plate member 20. The lower end of the thickness adjusting portion 21 is configured to coincide with the lower end of the plate member 20.

[0028] The front plate 20a and the rear plate 20b in this embodiment correspond to an example of a "first plate-like member" in the present invention, and the side plates 20c and 20d in this embodiment correspond to an example of a "second plate-like member" in the present invention.

[0029] The partition plate 20e is disposed between the front plate 20a and the rear plate 20b along the X direction in the drawing so as to connect to the inner surfaces of the side plates 20c and 20d. The position of the partition plate 20e is not particularly limited, but the distance D from the front plate 20a to the partition plate 20e is １ and the distance D from the rear plate 20b to the partition plate 20e ２ The ratio (D １ :D ２ ) is preferably 1:1 to 10:1, and more preferably 3:1 to 8:1. The partition plate 20e in this embodiment corresponds to an example of the "third plate-like member" in the present invention.

[0030] Although not particularly limited, in the road surface construction device 1, the area S between the front plate 20a and the partition plate 20e １ is an area (placement area) for placing the surface treatment mixture. In the road surface construction device 1, the area S between the partition plate 20e and the rear plate 20b is ２ is an area where the surface treatment mixture is spread and leveled (adjustment area). As will be described in detail later, the road surface construction device 1 is provided with a partition plate 20e and a brush unit 40e, so that the adjustment area S ２ In this case, the thickness of the surface treatment mixture in the road surface width direction (X direction) can be made uniform, and the thickness of the surface treatment layer can be made more uniform.

[0031] The main body 10 further comprises a top plate 14 provided to connect the front plate 20a and the rear plate 20b, and an adjustment rod 15 provided on the top plate 14. The top plate 14 and the adjustment rod 15 can be made of the same material as that of the plate member 20. As will be described later, by attaching a weight to the adjustment rod 15, it is possible to control the attitude of the road surface construction device 1 when towing it. It is noted that the road surface construction device 1 does not necessarily have to comprise the top plate 14 and the adjustment rod 15.

[0032] As shown in Figures 1 and 2, the main body 10 includes auxiliary members 30a to 30e attached to the lower surfaces of the front plate 20a, the rear plate 20b, the side plates 20c and 20d, and the partition plate 20e. Hereinafter, the auxiliary members 30a to 30e will be collectively referred to as auxiliary members 30. Each auxiliary member 30 has a plate-like shape and is disposed substantially parallel to the corresponding plate member 20. The auxiliary members 30a and 30b in this embodiment correspond to an example of a first auxiliary member in the aspect of the present invention, the auxiliary members 30c and 30d in this embodiment correspond to an example of a "second auxiliary member" in the aspect of the present invention, and 30e in this embodiment corresponds to an example of a "third auxiliary member" in the aspect of the present invention.

[0033] 4A is a cross-sectional view taken along line IVa-IVa in FIG. 2, and FIG. 4B is a cross-sectional view taken along line IVb-IVb in FIG.

[0034] As shown in Figures 4(a) and 4(b), the auxiliary member 30 includes a main body 31 and a thickness adjusting portion 32 provided on the surface of the main body 31 facing the plate member 20. The main body 31 and the thickness adjusting portion 32 are both plate-like members having a length equivalent to the longitudinal length of the corresponding plate member 20. The main body 31 and the thickness adjusting portion 32 are made of a metal material such as, but not limited to, stainless steel. The thickness of the main body 31 is preferably 2 to 9 mm, and more preferably 3 to 6 mm.

[0035] As shown in Figures 4(a) and 4(b), the main body 31 of the auxiliary member 30 is attached to the plate member 20 via a spacer 50, sandwiching a connection portion 43 (described below) of the brush unit 40 between the main body 31 and the plate member 20. This forms a space between the auxiliary member 30, the spacer 50, and the plate member 20, and the brush unit 40 is disposed in this space. The spacer 50 is a plate-like member having a length equivalent to the longitudinal length of the plate member 20, and is made of the same material as the plate member 20, although this is not particularly limited. Through holes are formed in the main body 31 and the spacer 50, and the main body 31 and the spacer 50 are screwed to the side surface of the plate member 20 with bolts 60.

[0036] The thickness adjusting portion 32 of the auxiliary member 30 contacts the bundle of linear members 41 (described later) of the brush portion 40, and sandwiches the bundle of linear members 41 between the thickness adjusting portion 21 of the plate member 20. Note that this is not particularly limited, and the auxiliary member 30 may not have the thickness adjusting portion 32, and the plate member 20 may not have the thickness adjusting portion 21. In other words, the bundle of linear members 41 may be sandwiched between the main body portion 31 and the plate member 20.

[0037] As shown in Figure 4(a), the lower surfaces of the auxiliary members 30a, 30b, and 30e provided on the front plate 20a, the rear plate 20b, and the partition plate 20e are all configured to be at the same vertical height as the lower surfaces of the front plate 20a, the rear plate 20b, and the partition plate 20e, respectively. On the other hand, as shown in Figure 4(b), the lower surfaces of the auxiliary members 30c and 30d provided on the side plates 20c and 20d are all configured to be positioned vertically lower than the lower surfaces of the side plates 20c and 20d. That is, in this embodiment, the lower ends of the auxiliary members 30c and 30d are positioned at the lowest part of the main body 10. Therefore, when the road surface construction device 1 is placed on the road surface, the lower surfaces of the auxiliary members 30c and 30d come into contact with the road surface, and the entire road surface construction device 1 is supported by the auxiliary members 30c and 30d. The auxiliary members 30c, 30d are arranged parallel to the side plates 20c, 20d, respectively, and extend along the towing direction of the road surface construction device 1. Therefore, by configuring the road surface construction device 1 to be supported by the auxiliary members 30c, 30d, it becomes easier to tow the road surface construction device 1 and the width of the surface treatment layer formed by the surface treatment mixture can be made more uniform. Furthermore, by the auxiliary members 30c, 30d coming into contact with the road surface, it is possible to prevent the surface treatment mixture placed inside the road surface construction device 1 from leaking out of the main body 10 in the width direction, so that the edges of the surface treatment layer can be shaped to fit the auxiliary members 30c, 30d, improving the finish of the edges.

[0038] In this embodiment, as shown in Fig. 4(b), the height of the lower surfaces of the main bodies 31c, 31d and the thickness adjusting parts 32c, 32d is the same, but this is not particularly limited. For example, the lower surfaces of the thickness adjusting parts 32c, 32d may be positioned lower than the lower surfaces of the main bodies 31c, 31d, and the entire road surface construction device 1 may be configured to be supported by the thickness adjusting parts 32c, 32d.

[0039] FIG. 5 is a side view of the road surface construction device 1 in this embodiment.

[0040] As shown in FIGS. 1 and 5 , the auxiliary members 30c, 30d provided on the side plates 20c, 20d further include protrusions 33c, 33d protruding from one longitudinal end of the main body portions 31c, 31d, respectively. The protrusions 33c, 33d are formed of plate-like members having the same thickness as the main body portions 31c, 31d, although this is not particularly limited. The lower surfaces of the protrusions 33c, 33d are configured to be continuous with the lower surfaces of the main body portions 31c, 31d. The lower surfaces of the protrusions 33c, 33d have a curved shape with a constant radius of curvature R, which increases in height with increasing distance from the main body portions 31c, 31d. The shape of the lower surfaces of the protrusions 33c, 33d is not particularly limited as long as the shape increases in height with increasing distance from the main body portions 31c, 31d. For example, the shape of the lower surfaces of the protrusions 33c and 33d may be a curved shape that does not have a constant radius of curvature, or may be a tapered shape.

[0041] In the present embodiment, the protrusions 33c and 33d are provided at one end of the main body 31c and 31d, but the positions of the protrusions 33c and 33d are not particularly limited thereto. For example, the protrusions 33c and 33d may be provided at one end in the longitudinal direction of the thickness adjusting portions 32c and 32d.

[0042] The auxiliary members 30c, 30d are provided with the protrusions 33c, 33d, which prevents the corners of the auxiliary members 30c, 30d from coming into contact with the road surface when towing the road surface construction device 1. This makes it easier to tow the road surface construction device 1 over the road surface, and also prevents damage to the road surface due to contact between the auxiliary members 30c, 30d and the road surface.

[0043] FIG. 6 is a diagram showing the configuration of the brush unit 40 in this embodiment.

[0044] As shown in FIGS. 4(a) and 4(b), the brush units 40a to 40e are attached to the sides of the front plate 20a, the rear plate 20b, the side plates 20c and 20d, and the partition plate 20e, respectively. As shown in FIG. 6, the brush unit 40 includes a plurality of linear members 41, a holding unit 42, and a connecting unit 43. The linear members 41 are made of a resin material such as polypropylene, although not particularly limited thereto. The linear members 41 have a width, although not particularly limited thereto, preferably 0.1 to 1 mm, and more preferably 0.3 to 0.6 mm. The linear members 41 have a length, although not particularly limited thereto, preferably 30 to 100 mm. The plurality of linear members 41 are bundled together and held by the holding unit 42.

[0045] As shown in FIG. 6 and other figures, the linear member 41 is a straight member. However, when the road surface construction device 1 is placed on the road surface, the protruding portion of the linear member 41 protruding from the main body 10 deforms to conform to the road surface (see FIG. 7 ). That is, when the road surface construction device 1 is placed on the road surface, the linear member 41 of the brush unit 40 can deform to conform to the convex portions of the road surface and can enter the concave portions of the road surface. This allows the surface treatment mixture to be applied appropriately according to the uneven shape of the road surface, thereby ensuring a uniform thickness of the layer of surface treatment mixture. Furthermore, because the brush unit 40 deforms to conform to the uneven shape of the road surface, no gaps are created between the road surface construction device 1 and the road surface. This prevents the surface treatment mixture disposed inside the road surface construction device 1 from leaking out, ensuring a uniform thickness of the layer of surface treatment mixture.

[0046] The linear members 41 of each brush part 40a-40e are configured so that the height position of the lower end coincides with the height position of the lower ends of the linear members 41 of the other brush parts 40a-40e. Furthermore, the linear members 41 of each brush part 40a-40e protrude from the lower end of the main body part 10. The protruding length of the linear members 41 of each brush part 40a-40e from the lower end of the main body part 10 is preferably 5 to 50 mm, and more preferably 10 to 30 mm. As described above, the lower end of the main body part 10 in this embodiment is the lower end (lower surface) of the auxiliary members 30c, 30d. That is, in this embodiment, the length of the linear members 41 of the brush parts 40c, 40d and the attachment positions of the brush parts 40c, 40d are adjusted so that the protruding length L from the lower ends of the auxiliary members 30c, 30d is 5 to 50 mm, as shown in FIG. 4(b). Furthermore, brush sections 40a, 40b are configured such that the positions of the lower ends of linear members 41 of brush sections 40a, 40b coincide with the positions of the lower ends of linear members 41 of brush sections 40c, 40d. By setting the protruding length of linear members 41 from main body section 10 within the above range, it becomes easier to control the thickness of the layer made of the surface treatment mixture to be thin (to about 1 to 2 mm).

[0047] The brush section 40b attached to the rear panel 20b also has the function of applying a brush finish to the surface of the layer of surface treatment mixture, as described below. As the brush section 40b slides over the layer of surface treatment mixture, the surface of the layer of surface treatment mixture is brush-finished, improving the appearance of the road surface after application. The length of the brush section 40b may be approximately 10 to 30 mm longer than the other brush sections. This allows for more appropriate control of the thickness and finish of the layer of surface treatment mixture.

[0048] As shown in FIGS. 4( a) and 4(b), in this embodiment, the bundle of linear members 41 of the brush unit 40 is sandwiched between the auxiliary member 30 and the plate member 20. As a result, the width W of the lower end of the bundle of linear members 41, measured in a direction perpendicular to the surface of the plate member 20, is controlled to approximately 5 to 20 mm. The width W of the lower end of the bundle of linear members 41 is preferably 5 to 20 mm, and more preferably 10 to 15 mm. By keeping the width W of the lower end of the bundle of linear members 41 within the above range, even if the bundle of linear members 41 contains the surface treatment mixture when applying the surface treatment mixture to the road surface using the road surface construction device 1, the bundle of linear members 41 can be prevented from expanding. This prevents the surface treatment mixture from being applied to unintended locations on the road surface due to the expansion of the bundle of linear members 41, thereby improving the surface finish of the layer made of the surface treatment mixture.

[0049] The holding portion 42 is formed by bending a plate-like member made of metal such as stainless steel, and as shown in Figures 4(a) and 4(b), it holds the plurality of linear members 41 by clamping them from above. The structure of the holding portion 42 is not particularly limited to this, as long as it has a structure that can hold the linear members 41.

[0050] The connecting portion 43 is formed integrally with the holding portion 42 using a metal plate-like member, although not particularly limited thereto. A plurality of through holes 44 are formed in the connecting portion 43. As shown in FIGS. 4( a ) and 4 ( b ), the entire brush portion 40 is attached to the main body 10 by screwing the connecting portion 43 with bolts 60 through the through holes 44. As shown in FIG. 6 , the through holes 44 are elongated vertically along the direction in which the linear members 41 extend. The vertical length of the through holes 44 is, although not particularly limited thereto, approximately 2 to 5 times the diameter of the bolts 60. By forming the through holes 44 in such a vertically elongated shape, the position of the bolts 60 in the through holes 44 can be adjusted, thereby enabling the vertical attachment position of the brush portion 40 relative to the main body 10 to be adjusted. In particular, by adjusting the vertical attachment position of the central brush portion 40 e, the thickness of the surface treatment mixture applied can be more appropriately adjusted. In addition, by adjusting the vertical mounting position of the rear brush section 40b, the strength of the brush finishing process on the layer of surface treatment mixture can be adjusted, and the appearance of the road surface after construction can be adjusted.

[0051] Next, a method for applying a surface treatment mixture using the road surface construction device 1 of this embodiment will be described. The method for applying a surface treatment mixture in this embodiment comprises a preparation step of placing the surface treatment mixture inside the main body 10, and an application step of towing the road surface construction device 1 and applying the surface treatment mixture to the road surface. As will be described later, the application step includes applying a brush finish to the surface of the surface treatment mixture using the brush unit 40. Figure 7 is a cross-sectional view showing the preparation step in the method for applying a surface treatment mixture using the road surface construction device 1 of this embodiment, and Figure 8 is a cross-sectional view showing the application step in the method for applying a surface treatment mixture using the road surface construction device 1 of this embodiment.

[0052] First, in the preparation step, as shown in Fig. 7, the road surface construction device 1 is placed on the road surface Z. At this time, the lower surfaces of the auxiliary members 30c and 30d come into contact with the road surface Z, and the road surface construction device 1 is supported by the auxiliary members 30c and 30d. Next, a surface treatment mixture M that has been mixed in advance using a mixer or the like is poured into the upper opening 12, and the mixture is poured into the placement area S between the front plate 20a and the partition plate 20e. １ The surface treatment mixture M is placed on the road surface Z. When the road surface construction device 1 is placed on the road surface Z, the linear members 41 of the brush part 40 deform to follow the convex portions on the road surface Z and enter the concave portions on the road surface Z, so that no gap is formed between the road surface construction device 1 and the road surface Z. As a result, the surface treatment mixture M is retained inside the road surface construction device 1 without leaking out to the outside.

[0053] Next, in the application step, as shown in Fig. 8, the towing section 13 of the road surface construction device 1 is held by connecting it to a moving device (not shown) such as a manual or automatic cart, and the road surface construction device 1 is towed forward (in the Y direction in the figure) manually or by the moving device. As the road surface construction device 1 is towed, a part of the surface treatment mixture M flows into the adjustment region S between the partition plate 20e and the rear plate 20b through the gap between the underside of the partition plate 20e and the road surface Z. ２ At this time, the brush part 40e attached to the partition plate 20e slides on the road surface Z and the surface treatment mixture M, so that the surface treatment mixture M is spread evenly in the width direction of the road surface, and the thickness of the surface treatment mixture M in the width direction of the road surface Z is adjusted to be uniform (about 1 to 2 mm).

[0054] Furthermore, the adjustment area S ２As the road surface construction device 1 is towed, the surface treatment mixture M inside the rear plate 20b is sent rearward relative to the road surface construction device 1 through the gap between the underside of the rear plate 20b and the road surface Z, and is applied to the road surface Z by the brush unit 40b. In this manner, a layer of the surface treatment mixture M is formed on the road surface Z along which the road surface construction device 1 has moved. At this time, the brush unit 40b attached to the rear plate 20b slides over the surface treatment mixture M, thereby applying a brush finish to the surface of the layer of the surface treatment mixture M. Furthermore, the auxiliary members 30c, 30d and the brush units 40c, 40d attached to the side plates 20c, 20d slide over the road surface Z, thereby preventing the surface treatment mixture M from spilling outward from the sides of the main body 10. As a result, the width of the layer of the surface treatment mixture M is controlled to a uniform width equivalent to the distance between the auxiliary members 30c, 30d.

[0055] When towing the road surface construction device 1, it is preferable that the lower surfaces of the auxiliary members 30c, 30d are not parallel to the Z surface of the road surface. Specifically, it is preferable that the road surface construction device 1 be slightly inclined so that the lower surfaces of the auxiliary members 30c, 30d are away from the road surface Z in the traveling direction of the road surface construction device 1. In order to tow the road surface construction device 1 in a slightly inclined state, it is preferable to adjust the position of the center of gravity of the road surface construction device 1 in advance, by adjusting the mounting position of the towing unit 13 in the height direction or by attaching a weight to the adjustment rod 15, although this is not particularly limited. By towing the road surface construction device 1 in an inclined state, the posture of the road surface construction device 1 can be stabilized and the road surface construction device 1 can be prevented from getting caught on unevenness on the road surface Z, making it possible to perform construction in a stable manner.

[0056] Finally, the surface treatment mixture M is cured and hardened to form a surface treatment layer on the road surface.

[0057] As described above, in the road surface construction device 1 of this embodiment, the brush units 40a, 40b attached to the front plate 20a and the rear plate 20b deform to follow the convex portions of the road surface and can enter into concave portions such as ruts in the road surface, so that the surface treatment mixture can be properly applied even inside concave portions of the road surface and can be applied to a uniform thickness (about 1 to 2 mm). Furthermore, because the brush units 40a, 40b follow the uneven shape of the road surface, no gaps are created between the road surface construction device 1 and the road surface, so leakage of the surface treatment mixture to the outside of the road surface construction device 1 can be prevented and the surface treatment mixture can be applied to a uniform thickness.

[0058] Furthermore, with the road surface construction device 1 of this embodiment, a brush finish can be applied to the surface of the surface treatment mixture applied to the road surface by the brush unit 40b. This can improve the appearance of the layer made of the surface treatment mixture. In particular, if brush finishing is not performed, the finish at the start and end of the application will be poor. However, in this embodiment, by performing brush finishing, the finish at the start and end of the surface treatment mixture can be improved, and the appearance of the entire layer made of the surface treatment mixture can be improved.

[0059] Furthermore, the road surface construction device 1 in this embodiment is equipped with brush units 40c, 40d attached to the side plates 20c, 20d. As a result, by towing the road surface construction device 1, the brush units 40c, 40d slide on the road surface in the direction of travel of the road surface construction device 1, thereby preventing the surface treatment mixture from leaking outward from the side plates 20c, 20d. Therefore, the width of the layer made of the surface treatment mixture applied by the road surface construction device 1 can be made uniform.

[0060] The road surface construction device 1 in this embodiment is also provided with a partition plate 20e and a brush unit 40e provided between the front plate 20a and the rear plate 20b. As a result, when the road surface construction device 1 is towed, the brush unit 40e slides on the surface treatment mixture, thereby forming an adjustment area S ２After adjusting the thickness of the surface treatment mixture in the width direction to be uniform, the surface treatment mixture can be applied to the road surface by the brush portion 40b of the rear plate 20b, thereby making it possible to make the thickness of the layer of the surface treatment mixture more uniform.

[0061] Furthermore, the road surface construction device 1 in this embodiment is equipped with an auxiliary member 30 attached to the plate member 20, and the linear members 41 of the brush unit 40 are sandwiched between the auxiliary member 30 and the plate member 20. This prevents the bundle of linear members 41 from spreading out and incorporating the surface treatment mixture when the road surface construction device 1 applies the surface treatment mixture, thereby preventing the surface treatment mixture from being applied to unintended locations on the road surface. This therefore improves the surface finish of the layer made of the surface treatment mixture.

[0062] Furthermore, in the road surface construction device 1 of this embodiment, the lower ends of the auxiliary members 30c, 30d provided on the side plates 20c, 20d are positioned lower than the lower ends of the side plates 20c, 20d. That is, in the main body 10, the lower surfaces of the auxiliary members 30c, 30d are positioned at the lowest point, and when the road surface construction device 1 is placed on the road surface, the auxiliary members 30c, 30d come into contact with the road surface, and the entire road surface construction device 1 is supported by the auxiliary members 30c, 30d. Because the auxiliary members 30c, 30d extend in a direction parallel to the traveling direction when the road surface construction device 1 is towed, the contact of the auxiliary members 30c, 30d with the road surface makes it easier to tow the road surface construction device 1. In addition, when the road surface construction device 1 is towed, the auxiliary members 30c and 30d slide on the road surface, which makes it possible to better prevent the surface treatment mixture from leaking out from the sides of the main body 10, and makes the width of the layer of applied surface treatment mixture more uniform.

[0063] Furthermore, the road surface construction device 1 in this embodiment is provided with protrusions 33c, 33d provided on one end of the auxiliary members 30c, 30d, respectively. This prevents the corners of the auxiliary members 30c, 30d from coming into contact with the road surface when the road surface construction device 1 is towed, making it easier to tow the road surface construction device 1 and preventing damage to the road surface.

[0064] Furthermore, the layer made of the surface treatment mixture formed by the road surface construction device 1 in this embodiment has an improved appearance due to brush finishing. Therefore, even when a portion that has already been constructed using the surface treatment mixture is repeatedly constructed, the overlapping portions of the layer made of the surface treatment mixture can have an excellent appearance.

[0065] It should be noted that the above-described embodiments have been described to facilitate understanding of the present invention, and are not intended to limit the present invention. Therefore, the elements disclosed in the above embodiments are intended to include all design modifications and equivalents that fall within the technical scope of the present invention.

[0066] For example, in the above embodiment, the road surface construction device 1 is used to apply a surface treatment mixture containing a mortar material, but the use of the road surface construction device 1 is not particularly limited to this. The road surface construction device 1 can be widely used to apply substances that have a fluidity that allows them to be applied by the brush unit 40.

[0067] DESCRIPTION OF SYMBOLS 1...Road surface construction device 10...Main body 11...Bottom opening 12...Top opening 13...Traction part 14...Top plate 15...Adjustment rod 20...Plate member 20a...Front plate 20b...Rear plate 20c, 20d...Side plates 21...Thickness adjustment part 30, 30a, 30b, 30c, 30d, 30e...Auxiliary member 31...Main body 32...Thickness adjustment part 33...Protrusion part 40, 40a, 40b, 40c, 40d, 40e...Brush part 41...Linear member 42...Holding part 43...Connection part 44...Through hole 50...Spacer 60...Bolt S １ ...Placement area S ２ ...Adjustment area M...Surface treatment mixture Z...Road surface

Claims

1. A road surface construction device comprising: a main body portion having a rectangular frame shape; and a brush portion provided on the main body portion, wherein the main body portion includes two first plate-shaped members arranged along a first direction and two second plate-shaped members arranged along a second direction intersecting the first plate-shaped members, the brush portion comprising a plurality of linear members and a holding portion for holding the linear members, the linear members protruding from the lower end of the main body portion, and the brush portion including a first brush portion provided on the first plate-shaped member.

2. A road surface construction device as claimed in claim 1, wherein said brush section includes a second brush section provided on said second plate-like member.

3. A road surface construction device as described in claim 1 or 2, wherein the main body portion is provided with a third plate-like member connected to the two second plate-like members and arranged along the first direction between the two first plate-like members, and the brush portion includes a third brush portion provided on the third plate-like member.

4. A road surface construction device as described in any one of claims 1 to 3, wherein the main body portion is provided with a first auxiliary member provided on the first plate-shaped member, and the linear member of the first brush portion is sandwiched between the first plate-shaped member and the first auxiliary member.

5. A road surface construction device as described in claim 2, wherein the main body portion is provided with a second auxiliary member provided on the second plate-shaped member, and the linear member of the second brush portion is sandwiched between the second plate-shaped member and the second auxiliary member.

6. A road surface construction device as described in claim 3, wherein the main body portion is provided with a third auxiliary member provided on the third plate-shaped member, and the linear member of the third brush portion is sandwiched between the third plate-shaped member and the third auxiliary member.

7. A road surface construction device as claimed in claim 5, wherein the lower end of the second auxiliary member is located lower than the lower end of the second plate-shaped member in the vertical direction.

8. A road surface construction device as described in claim 5, wherein the second auxiliary member is provided with a plate-shaped protrusion protruding from an end of the second auxiliary member in the longitudinal direction.

9. A road surface construction device according to claim 8, wherein the protrusion has a curved shape.

10. A road surface construction device as claimed in any one of claims 1 to 9, wherein the length of the linear member protruding from the main body is 5 to 50 mm.

11. A road surface construction method using a road surface construction device according to any one of claims 1 to 10, comprising: a preparation step of placing a surface treatment mixture inside the main body; and an application step of towing the road surface construction device and applying the surface treatment mixture onto the road surface.

12. A road surface construction method as claimed in claim 11, wherein the application step includes applying a brush finishing process to the surface of the surface treatment mixture using the brush section.

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