Road surface heating device

Abstract

To provide a road surface heating device capable of heating an existing road surface with a large area to necessary temperature in a short time and facilitating the construction of the existing road surface.SOLUTION: Provided is a road surface heating device 1 that heats an asphalt-paved existing road surface RS, the device comprising a heating device body 2 with the underside opened toward the existing road surface RS and four corners of the underside being provided with wheels 61, which are supported for vertical movement and rotatable, a burner device 20 disposed at the top of the heating device body 2 and formed to supply hot air to the inside of the heating device body 2, and an airflow adjustment member 53 disposed at the bottom of the heating device body 2, rectifying the hot air from the burner device 20 and leading it to the existing road surface RS evenly.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a road surface heating device. [Background technology]

[0002] Conventionally, grooves have been formed in existing asphalt pavement for the purpose of providing anti-slip properties, etc. When construction is added to an existing road surface, construction is performed in which the asphalt pavement is heated to improve workability. For example, Patent Document 1 discloses a technology in which, in a grooving operation for forming grooves in a road surface, a road surface material is heated and softened by a heater mounted on a work vehicle, and then a grooved roller is pressed against the road surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-82707 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional technology, when the area of ​​work to be done is large, it takes a long time to heat the existing road surface to a temperature suitable for work. In particular, in cold seasons, it takes more than twice as long to heat the existing road surface to the required temperature as in summer, which significantly reduces workability. Therefore, the object of the present invention is to provide a road surface heating device that can solve the above-mentioned problems, heat a large area of ​​existing road surface to the required temperature in a short period of time, and facilitate construction on the existing road surface. [Means for solving the problem]

[0005] One aspect of the present invention is a road surface heating device for heating an existing road surface paved with asphalt, comprising a heating device main body with an underside open towards the existing road surface and having wheels supported at the four corners of the underside for vertical movement and capable of rotating freely, a burner device arranged at the top of the heating device main body and configured to be able to supply hot air into the heating device main body, and an airflow adjustment member arranged at the bottom of the heating device main body for straightening the hot air from the burner device and directing it evenly onto the existing road surface. Effect of the Invention

[0006] According to the present invention, by evenly directing the hot air supplied by the burner device onto the existing road surface, a large area of ​​the existing road surface can be heated to the required temperature in a short period of time, making it easier to carry out construction on the existing road surface. [Brief description of the drawings]

[0007] [Figure 1] FIG. 2 is a plan view of the road surface heating device. [Diagram 2] FIG. 2 is a side view of the road surface heating device. [Diagram 3] FIG. 2 is a side view of the road surface heating device. [Figure 4] FIG. 2 is a plan view of a main portion of the road surface heating device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a plan view of a road surface heating apparatus 1 to which this embodiment is applied. Fig. 2 is a side view of the road surface heating apparatus 1, which is a view of the road surface heating apparatus 1 from the direction indicated by the symbol A in Fig. 1. Fig. 3 is a side view of the road surface heating apparatus 1, which is a view of the road surface heating apparatus 1 from the direction indicated by the symbol B in Fig. 1.

[0009] Figures 2 and 3 show a state in which the road surface heating device 1 is used, with the road surface RS being installed to be heated. Each of Figures 1 to 4 shows an X-axis, a Y-axis, and a Z-axis. The X-axis, Y-axis, and Z-axis are mutually perpendicular, with the X-axis corresponding to the left-right direction of the road surface heating device 1 and the Y-axis corresponding to the front-rear direction of the road surface heating device 1. The Z-axis indicates a vertical direction perpendicular to the road surface RS, and corresponds to the up-down direction of the road surface heating device 1. In the following description, the positive direction of the X-axis is the leftward direction, the positive direction of the Y-axis is the forward direction, and the positive direction of the Z-axis is the upward direction.

[0010] The road surface heating device 1 is a device that heats an existing road surface RS. The road surface RS is, for example, the surface of an asphalt-paved road. The road surface heating device 1 has a heating device main body 2. The road surface heating device 1 of this embodiment is configured by connecting two heating units 2a and 2b.

[0011] The heating unit 2a has a lid body 3a and a frame body 51a that contacts the bottom of the lid body 3a and supports the lid body 3a. The heating unit 2b has a lid body 3b and a frame body 51b that contacts the bottom of the lid body 3b and supports the lid body 3b. The frame bodies 51a and 51b each have a rectangular frame shape, and are joined together with their long sides to form a base 5.

[0012] The heating unit 2a and the heating unit 2b are configured symmetrically using members of a common shape. In the following description, the heating unit 2a and the heating unit 2b are not distinguished from each other and are referred to as the heating device main body 2, and the configuration of the heating device main body 2 will be described. Similarly, the lid body 3a and the lid body 3b are referred to as the lid body 3, and the frame body 51a and the frame body 51b are referred to as the frame body 51.

[0013] The lid body 3 has a generally quadrangular pyramid shape with four side surfaces. The lid body 3 is formed by connecting four side panels 31, 32, 33, and 34 made of metal plate material. A top plate 35 is disposed on the top of the lid body 3. The top plate 35 is disposed so that the top plate 35 is generally parallel to the road surface RS when the road surface heating device 1 is in use. The lid body 3 is preferably formed by joining the side panels 31, 32, 33, and 34 and the top plate 35 by welding or the like without any gaps.

[0014] A circular opening 35a is formed in the top plate 35. An introduction pipe 36 is connected to the top plate 35 so as to close the opening 35a. The introduction pipe 36 is joined downward to the opening 35a, bends at a substantially right angle, and extends horizontally.

[0015] The burner body 21 is attached to the horizontal section 36a of the introduction pipe 36. The burner body 21 is a combustion device that burns fuel gas supplied from a gas cylinder 22 attached to a cylinder attachment section 8 described below. The burner body 21 burns the fuel gas and discharges hot air from its tip toward the introduction pipe 36. The burner body 21 and the introduction pipe 36 constitute the burner device 20.

[0016] As shown in Fig. 3, the outer diameter of the burner body 21 is smaller than the inner diameter of the introduction pipe 36, and a gap is provided between the introduction pipe 36 and the burner body 21. This gap constitutes an air entrainment space that introduces outside air into the inside of the introduction pipe 36. That is, when the burner body 21 burns gas, a hot air current is blown along the horizontal part 36a, and the negative pressure generated by this hot air current causes the outside air to be introduced into the horizontal part 36a through the gap between the introduction pipe 36 and the burner body 21. This allows a large amount of hot air to be sent from the burner body 21 to the inside of the lid body 3 through the introduction pipe 36 and the opening 35a.

[0017] The top plate 35 and the introduction pipe 36 may be connected so that the introduction pipe 36 can rotate around the opening 35a. In this case, the arrangement of the gas pipe (not shown) connecting the burner body 21 and the gas cylinder 22 is easy.

[0018] A substantially quadrangular pyramid-shaped space is formed inside the lid 3. An adjustment plate 37 is disposed in the internal space of the lid 3. The adjustment plate 37 is a substantially diamond-shaped plate, and is disposed near the center of the lid 3 in the height direction.

[0019] Beam members 38 and 39 are disposed below the adjustment plate 37. The beam member 38 is provided across the side plate 33 and the side plate 34 that face each other among the side surfaces of the lid body 3, and is a rod-shaped member that is substantially parallel to the short side of the cross section of the lid body 3. The beam member 39 is provided across the side plate 31 and the side plate 32 that face each other among the side surfaces of the lid body 3, and is a rod-shaped member that is substantially parallel to the long side of the cross section of the lid body 3. For example, the beam member 38 is joined to each of the side plate 33 and the side plate 34 by welding, and the beam member 39 is joined to each of the side plate 31 and the side plate 32 by welding. The beam members 38 and the beam members 39 are combined in a cross shape, and the adjustment plate 37 is placed on the beam members 38 and 39 in a range including the intersection of the beam members 38 and 39, and is firmly supported from below. The beam members 38 and 39 and the adjustment plate 37 may be joined by welding or the like.

[0020] The adjustment plate 37 is a flat plate without any openings, but may be a perforated plate such as a punched metal plate or a flat plate with slits formed therein.

[0021] The frame 51 is a rectangular frame made up of rod-shaped members of a predetermined thickness. The frame 51 is sized and shaped so that, when the lid 3 is placed on the frame 51, the outer periphery of the lid 3 overlaps with the rod-shaped members of the frame 51.

[0022] A perforated plate 53 is disposed inside the frame 51. The perforated plate 53 is made of a punched metal plate. The perforated plate 53 is made of a perforated metal plate with slits, or a plate material having other types of holes. The size of the holes in the perforated plate 53 is not limited, but the aperture ratio, i.e., the ratio of the opening area of ​​the holes to the area of ​​the perforated plate 53, is preferably 70% or less, and more preferably 60% or less.

[0023] The perforated plate 53 is disposed approximately in the center of the space inside the frame body 51, and is connected to the frame body 51 by a plurality of brackets 52. The brackets 52 are joined to the frame body 51 and the perforated plate 53 by screws or welding. In the height direction of the road surface heating device 1, the perforated plate 53 is located lower than the upper end of the frame body 51.

[0024] Fig. 4 is a plan view of the main parts of the road surface heating device 1, showing the heating unit 2a without the side panels 31, 32, 33, 34 of the lid body 3, the top panel 35, and the burner device 20. For ease of understanding, the opening 35a is shown in phantom lines in Fig. 4. The configuration of the heating unit 2b is symmetrical to that of the heating unit 2a and has a common configuration with the heating unit 2a, and therefore is not shown in the drawings.

[0025] As shown in Figure 4, since the perforated plate 53 is smaller than the inside dimension of the frame body 51, a gap is formed around the perforated plate 53 between the perforated plate 53 and the frame body 51, and the internal space of the lid body 3 is connected to the outside through this gap.

[0026] Beam member 38 is disposed across side plate 33 and side plate 34, and beam member 39 is disposed across side plate 31 and side plate 32. Therefore, cross section 30 of cover 3 at the height position where adjustment plate 37 is installed is a rectangle having a width equal to the length of beam member 38 and a length equal to the length of beam member 39, as shown by the dashed dotted line in FIG.

[0027] The adjustment plate 37 is smaller than the cross section 30, and is smaller than the cross section 30 in both the left-right direction and the front-rear direction of the road surface heating device 1. The adjustment plate 37 is also substantially rhombic, and the longitudinal direction of the adjustment plate 37 is parallel to the short sides of the lid body 3. Therefore, a gap is formed around the adjustment plate 37 between each of the side plates 31, 32, 33, and 34 of the lid body 3. The adjustment plate 37 is desirably larger than the opening 35a, and it is preferable that the adjustment plate 37 covers the area directly below the opening 35a.

[0028] 3, white arrows diagrammatically show the flow of hot air blown into the inside of the lid 3 from the introduction pipe 36. As shown in FIG. 3, the hot air supplied from the burner device 20 is blown downward through the opening 35a.

[0029] Adjustment plate 37 is located directly below opening 35a. Therefore, the hot air blown into lid body 3 from opening 35a collides with adjustment plate 37, diffuses inside lid body 3, and moves to the lower part of lid body 3 through the gap around adjustment plate 37.

[0030] The hot air that reaches the bottom of the lid 3 collides with the perforated plate 53, diffuses into the space between the perforated plate 53 and the adjustment plate 37, and then flows out to the outside through the holes in the perforated plate 53 and the gaps around the perforated plate 53.

[0031] The road surface RS is heated by the hot air discharged from the holes in the perforated plate 53 and the gaps around the perforated plate 53, and is further heated by radiant heat from the perforated plate 53, which has become hot due to the hot air. Therefore, the entire road surface RS located below the lid body 3 is heated without causing a large temperature bias.

[0032] The perforated plate 53 has the effect of reducing the wind speed of the hot air flowing from inside the lid body 3 toward the road surface RS, and distributing the hot air over almost the entire inside of the frame body 51. The perforated plate 53 also allows the hot air to flow out little by little onto the road surface RS through holes formed in the perforated plate 53, supplying the hot air evenly to the road surface RS. In addition, since the hot air spreads over the space above the perforated plate 53, the perforated plate 53 becomes hot, and the road surface RS is heated by the radiant heat.

[0033] Furthermore, since the adjustment plate 37 is disposed directly below the opening 35a, the hot air flowing downward from the opening 35a collides with the adjustment plate 37, thereby slowing down the flow rate of the hot air and diffusing the hot air widely. This, in addition to the effect of the perforated plate 53, allows the hot air to be distributed more evenly inside the lid 3.

[0034] Therefore, the entire road surface RS in the area overlapping with the base 5 can be efficiently heated to a high temperature by the heat supplied by the burner device 20.

[0035] The size of the perforated plate 53 is arbitrary, but it is preferable that the perforated plate 53 occupies 70% or more of the inside dimension of the frame body 51, i.e., the area of ​​the internal space, more preferably 80% or more, and most preferably 90% or more.

[0036] Caster units 6 are attached to the four corners of the base 5. The caster units 6 include wheels 61, a support plate 62 that supports the wheels 61, and a lever 65 fixed to the support plate 62. The support plate 62 holds the axles of the wheels 61 and is rotatably supported by the frame body 51 via a shaft 63. A ground projection 64 is formed on one end of the support plate 62, which protrudes forward of the wheels 61 in the Y-axis direction.

[0037] In the following, the four caster units 6 provided in the road surface heating device 1 will be referred to as caster units 6a, 6b, 6c, and 6d, respectively, and will be referred to as caster unit 6 when there is no need to distinguish between them.

[0038] The caster unit 6 is displaced together with the wheel 61 by operating the lever 65, and changes between a first position where the wheel 61 contacts the road surface RS and a second position where the wheel 61 is separated from the road surface RS. In the following, the first position is referred to as a traveling position, and the second position is referred to as a stopped position. FIG. 3 shows a state in which the caster unit 6c is in the traveling position and the caster unit 6d is in the stopped position.

[0039] In the traveling position, the wheels 61 are in contact with the road surface RS, and the road surface heating device 1 does not come into contact with the road surface RS other than the wheels 61. With the four caster units 6a to 6d in the traveling position, the load of the road surface heating device 1 is supported by the four wheels 61, and the road surface heating device 1 can be moved in its fore-and-aft direction, i.e., in the Y-axis direction.

[0040] When the caster unit 6 is in the traveling position, the lever 65 is in a nearly horizontal position. When the lever 65 is rotated in the direction indicated by the arrow M1 in the figure and raised, the support plate 62 rotates around the shaft 63 together with the lever 65 and moves to the stop position.

[0041] At the stop position, the grounding protrusion 64 formed on one end of the support plate 62 protrudes below the wheel 61 and touches the road surface RS. The grounding protrusion 64 touches the road surface RS, and the wheel 61 separates from the road surface RS. Therefore, when the caster unit 6 is at the stop position, the road surface heating device 1 does not move due to friction between the grounding protrusion 64 and the road surface RS. Also, at the stop position, when the grounding protrusion 64 is in the ground, a gap is generated between the road surface RS and the frame body 51. Through this gap, the air after combustion can escape from inside the heating units 2a, 2b to the outside. This allows the combustion gas and air sent from the burner body 21 to the heating units 2a, 2b to escape, and the air inside the heating units 2a, 2b can be balanced.

[0042] When the lever 65 is rotated in the direction indicated by the arrow M2 in the figure and tilted down with the caster unit 6 in the stopped position, the support plate 62 rotates together with the lever 65 about the shaft 63 and moves to the traveling position.

[0043] In this way, when all four caster units 6a to 6d are in the running position, the road surface heating device 1 can be moved on the road surface RS. Also, when any of the four caster units 6a to 6d are in the stopped position, the road surface heating device 1 does not move. When heating the road surface RS with the road surface heating device 1, it is preferable to set the caster unit 6 in the stopped position and to keep the road surface heating device 1 from moving. In this case, it is preferable to set at least two or more caster units 6 in the stopped position.

[0044] As shown in FIG. 3, in the stop position, the distance between the lower end of the frame body 51 and the road surface RS is greater than the distance between the lower end of the frame body 51 and the road surface RS in the running position. Therefore, when the road surface heating device 1 heats the road surface RS, the gap between the frame body 51 and the road surface RS becomes larger, and the hot air inside the cover body 3 is more likely to escape to the outside. This reduces the ventilation resistance when the burner device 20 supplies hot air, and is expected to have the effect of not impeding the combustion of the burner device 20. The distance between the lower end of the perforated plate 53 and the road surface RS in the stop position is, for example, preferably 70 mm or less, more preferably 50 mm or less, and even more preferably 35 mm or less.

[0045] The road surface heating apparatus 1 is provided with a handle 9. The handle 9 straddles the frame bodies 51a and 51b and is fixed to the rear end of the base 5. When moving the road surface heating apparatus 1, an operator can grasp the handle 9 with his or her hand and push the road surface heating apparatus 1, thereby easily moving the road surface heating apparatus 1.

[0046] The road surface heating device 1 is provided with a cylinder mounting part 8. As shown in Fig. 1 and Fig. 3, the cylinder mounting part 8 has a circular frame 81 that holds the peripheral surface of the gas cylinder 22, a bottom support part 82 that supports the bottom part of the gas cylinder 22 from below, and a pillar 83 that fixes the circular frame 81 and the bottom support part 82 to the frame body 51. With the gas cylinder 22 mounted on the cylinder mounting part 8, the road surface heating device 1 is movable together with the gas cylinder 22.

[0047] As shown in Fig. 1, the road surface heating device 1 has a cylinder mounting part 8a arranged in the heating unit 2a, and a cylinder mounting part 8b arranged in the heating unit 2b. By providing the cylinder mounting part 8 in each of the heating units 2a and 2b in this way, it is possible to supply fuel gas from a gas cylinder 22 to each of the burner main body 21 of the heating unit 2a and the burner main body 21 of the heating unit 2b. In addition, the gas pipe connecting the gas cylinder 22 and the burner main body 21 is easy to handle.

[0048] The road surface heating device 1 can be used, for example, to heat the asphalt pavement of roads including roadways. The road surface heating device 1 can be moved in the front-rear direction by the caster unit 6. For this reason, it is preferable that the width of the road surface heating device 1, i.e., the size of the base part 5 in the X-axis direction, corresponds to the width of the lane of the road. In other words, the road surface heating device 1 has a width equivalent to the width of one lane of the road surface RS, which is an existing road surface. This allows the road surface RS with an area equivalent to one lane to be continuously heated while the road surface heating device 1 is moved in the extension direction of the lane.

[0049] An example of a task using the road surface heating device 1 is the formation of grooves in the road surface RS. This task is also called grooving. An example of a process for forming grooves in the road surface RS will be described below.

[0050] In the first step, the road surface heating device 1 is moved to a treatment position on the road surface RS. In the second step, the caster units 6 of the road surface heating device 1 are switched to a stopped position, so that the road surface heating device 1 does not move. In the third step, the burner body 21 is ignited to heat the road surface RS. The heating time in the third step is appropriately determined according to the road surface temperature, air temperature, and weather before construction. For example, there is a method of measuring the temperature (road surface temperature) of the road surface RS directly under the road surface heating device 1 and continuing heating until the target temperature is reached. In a fourth step, the caster units 6 of the road surface heating apparatus 1 are switched to the traveling position, making the road surface heating apparatus 1 movable. In a fifth step, the road surface heating device 1 is moved to expose the heated road surface RS. In a sixth step, grooves are formed on the heated road surface RS.

[0051] An example of the sixth step is a method of forming grooves by pressing a pressing tool (template) made of steel materials combined according to the groove pattern onto the road surface RS to partially recess the road surface RS. In this method, for example, a work vehicle equipped with a pressing tool is moved onto the heated road surface RS, and the work vehicle presses down on the pressing tool to press the road surface RS. As a variation of this method, a method of partially recessing the road surface RS by placing a pressing tool on the road surface RS using a crane and pressing the pressing tool with a forward / backward plate is available.

[0052] The road surface RS heated to a high temperature by the road surface heating device 1 is softened asphalt pavement, so when the pressing tool is pressed against it, it easily deforms and forms a depression. This makes it easy to form grooves and completes construction in a short time. The road surface heating device 1 can heat the road surface RS in the construction area without significant bias, which has the advantage of reducing uneven construction caused by the pressing tool and forming uniform grooves in the construction area. Another advantage is that no waste material or dust is generated because the road surface RS is not cut.

[0053] Another example of the sixth step is a method of partially cutting the road surface RS with a cutting tool having a cutter bit to form a groove. In this case, cutting may be performed while a work vehicle equipped with the cutting tool is driven on the heated road surface RS. The work vehicle may be a self-propelled vehicle or a device that is pushed by human power.

[0054] In this method, since the road surface RS that has been softened by heating is cut, cutting can be performed quickly and to a sufficient depth compared to cutting a cold road surface RS, and the construction time can be shortened. In addition, since the road surface RS is soft, there are advantages in that vibration and noise during cutting are small and dust generation is suppressed. And, since the road surface heating device 1 heats the road surface RS in the construction range without significant bias, there are advantages in that there is little unevenness in the hardness of the road surface RS and construction can be easily performed in a shorter time.

[0055] By forming grooves in the road surface RS, it is possible to expect effects such as improved vehicle driving safety due to increased skid resistance in rainy weather, improved drainage, and reduced water splashes when the road surface RS is wet. Furthermore, it is possible to improve the retention effect of antifreeze agent sprayed on the road surface RS, and thereby improve the sustainability of the antifreeze effect.

[0056] In the above embodiment, the road surface RS is an example of an existing road surface. The perforated plate 53 is an example of an airflow adjustment member.

[0057] As described above, the road surface heating device 1 to which the present invention is applied is a road surface heating device 1 that heats an asphalt-paved road surface RS. The road surface heating device 1 is equipped with a heating device main body 2 that has an underside open toward the road surface RS and has wheels 61 that are supported at the four corners of the underside so as to be vertically movable and can rotate freely. The device also includes a burner device 20 that is disposed at the top of the heating device main body 2 and is configured so as to be able to supply hot air into the heating device main body 2. The device also includes a perforated plate 53 that is disposed at the bottom of the heating device main body 2 and straightens the hot air from the burner device 20 and guides it evenly to the road surface RS.

[0058] According to this configuration, when the road surface heating device 1 is positioned above the road surface RS and fuel is burned by the burner device 20, hot air is evenly guided by the perforated plate 53. This allows the road surface RS in the area overlapping with the road surface heating device 1 to be heated evenly. The road surface heating device 1 is movable by wheels 61, and a wide area of ​​the road surface RS can be heated while the road surface heating device 1 is moved. This allows the hot air supplied by the burner device to be evenly guided to the road surface RS, allowing a large area of ​​the road surface RS to be heated to the required temperature in a short time, facilitating construction on the existing road surface.

[0059] In the road surface heating device 1, the heating device main body 2 is equipped with a lid body 3 formed in an approximately quadrangular pyramid shape, and a burner device 20 is disposed on the top of the lid body 3, and hot air is supplied to the inside of the lid body 3 by the burner device 20. According to this configuration, the hot air supplied by the burner device 20 is uniformly guided inside the lid body 3, so that a wide range of the road surface RS can be heated evenly. Therefore, in the process of heating the road surface RS to a high temperature and carrying out the work, the road surface RS can be worked on evenly.

[0060] In the road surface heating device 1, the heating device main body 2 includes a frame 51 located at the bottom of the heating device main body 2 and supporting the lid body 3. The perforated plate 53 is a plate disposed inside the frame 51 and facing the lower surface of the lid body 3, and a gap is provided between the frame 51 and the perforated plate 53. According to this configuration, the road surface RS below the lid body 3 can be heated evenly by the hot air supplied by the burner device 20.

[0061] In the road surface heating device 1, an opening 35a through which hot air from the burner device 20 flows in is formed at the top of the lid body 3, and an adjustment plate 37 is disposed directly below the opening 35a. According to this configuration, the hot air supplied by the burner device 20 is dispersed inside the lid body 3 by the adjustment plate 37 located below the opening 35a. Therefore, the hot air can be distributed more evenly inside the lid body 3, and the road surface RS can be heated evenly.

[0062] In the road surface heating device 1, the burner device 20 is connected to the top of the heating device main body 2 and comprises an introduction pipe 36 having a horizontal section 36a extending approximately horizontally, and a burner main body 21 inserted into the horizontal section 36a with an air entrainment space therebetween. According to this configuration, the burner body 21 can be held in a direction suitable for combustion, and hot air can be supplied toward the road surface RS below the road surface heating device 1.

[0063] The heating device main body 2 has a width equivalent to the width of one lane of the existing road surface. According to this configuration, an area of ​​one lane of the road surface RS of an existing paved road can be heated by the road surface heating device 1. Therefore, the existing pavement of the road can be efficiently heated and worked on.

[0064] The above embodiment shows a specific example to which the present invention is applied, and does not limit the form to which the invention is applied.

[0065] In the above embodiment, the road surface heating device 1 has been described as having two heating units 2a and 2b connected in the left-right direction, but this is just one example. For example, the road surface heating device 1 may have only the heating unit 2a or only the heating unit 2b. In this case, the heating unit 2a or the heating unit 2b can be realized by arranging the caster units 6 at the four corners of the frame body 51. The road surface heating device 1 may also have three or more heating device bodies 2 arranged and connected in the X-axis direction. The number of heating device bodies 2 may be determined according to the width of the heating device body 2 in the X-axis direction and the width of one lane of the road surface RS. In addition, the road surface RS heated by the road surface heating device 1 is not limited to asphalt pavement. For example, heating by the road surface heating device 1 is applicable to any road surface that is paved such that workability is increased by heating.

[0066] In the above embodiment, a configuration in which one perforated plate 53 is disposed inside the frame body 51 has been described, but this is only one example. For example, instead of the perforated plate 53, a plurality of perforated plates may be arranged side by side inside the frame body 51. In this case, the perforated plates may be arranged with a space between each other, or adjacent perforated plates may be overlapped to arrange the perforated plates without gaps. The perforated plate used in this case may be a punched metal, or may be a plate with slits formed therein. Furthermore, the shape of the adjustment plate 37 is not limited to a rhombus, but may be a rectangle, a circle, or another shape.

[0067] In the above embodiment, the road surface heating device 1 has a cylinder mounting part 8 and is configured to be able to mount the gas cylinder 22, but the road surface heating device 1 may also be configured such that the gas cylinder 22 mounted on a cart or the like separate from the road surface heating device 1 is connected to the burner body 21 by a gas pipe. In addition, the fuel for the burner body 21 is not limited to fuel gas, and may be, for example, fuel oil.

[0068] The road surface heating device 1 may be a self-propelled device. For example, a drive device equipped with a power source such as a motor may be provided instead of the caster unit 6. In this case, the road surface heating device 1 may be configured to be equipped with a battery that serves as a power source for the motor.

[0069] In the road surface heating device 1 described in the above embodiment, for example, the side panels 31, 32, 33, 34, top panel 35, inlet pipe 36, adjustment panel 37, and beam members 38, 39 constituting the cover 3 are made of metal plates, and the frame 51 is made of a metal square tube. These materials can be changed to any other material as long as they satisfy the heat resistance and mechanical strength. In addition, it is also possible to change the side panels 31, 32, 33, 34 to provide insulating materials, and other detailed configurations can also be changed arbitrarily. [Explanation of symbols]

[0070] 1 Road heating device 2 Heating device body 2a, 2b Heating unit 3, 3a, 3b lid body 5 Base 6, 6a, 6b, 6c, 6d Caster Units 8, 8a, 8b Cylinder attachment part 9 Handle 20 Burner equipment 21 Burner body 22 Gas Cylinder 30 Section 31, 32, 33, 34 side plate 35 Tabletop 35a opening 36 Introductory tube 36a Horizontal section 37 Adjustment plate 38, 39 Beam members 51, 51a, 51b frame 52 Bracket 53 Perforated plate (airflow adjustment member) 61 wheels 62 Support plate 63 Axis 64 Ground protrusion 65 Lever 81 Circular Frame 82 Bottom support part 83 Pillars RS road surface (existing road surface)

Claims

1. A road surface heating device for heating an existing asphalt-paved road surface, a heating device body having a lower surface open toward the existing road surface and wheels supported at four corners of the lower surface so as to be movable up and down and rotatable; A burner device is disposed on the top of the heating device body and configured to be capable of supplying hot air to the inside of the heating device body; and an airflow adjustment member that is disposed at the bottom of the heating device body and straightens the hot air from the burner device and guides it evenly to the existing road surface. Road heating equipment.

2. The heating device body includes a cover body formed in a substantially quadrangular pyramid shape, The burner device is disposed on the top of the lid body, and hot air is supplied to the inside of the lid body by the burner device. A road surface heating device according to claim 1.

3. the heating device body includes a frame body located at a bottom of the heating device body and supporting the lid body, The airflow adjustment member is a perforated plate disposed inside the frame body and facing the lower surface of the lid body, The road surface heating device according to claim 2 , wherein a gap is provided between the frame and the perforated plate.

4. An opening is formed at the top of the lid through which hot air from the burner device flows in, The road surface heating device according to claim 2 , wherein an adjustment plate is disposed directly below the opening.

5. The burner device is The heater includes an introduction pipe having a horizontal portion connected to a top of the heater body and extending substantially horizontally, and a burner body inserted into the horizontal portion with an air entrainment space therebetween. A road surface heating device according to claim 2.

6. The heating device body has a width equivalent to the width of one lane of an existing road surface, A road surface heating device according to any one of claims 1 to 5.

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