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 pavements for the purpose of providing slip resistance, etc. When construction is added to an existing road surface, the asphalt pavement is heated to improve workability. For example, Patent Document 1 discloses a technology for grooving work to form grooves in a road surface, in which 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 construction area is large, it takes a long time to heat the existing road surface to a temperature suitable for construction. 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 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 asphalt-paved road surface, comprising: a heating device main body with an underside open toward the existing road surface and having rotatable wheels supported at the four corners of the underside so that they can move up and down; 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, which straightens the hot air from the burner device and directs it evenly onto the existing road surface. [Effects 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 explanation of the drawings]

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

[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 the road surface heating device 1 in use, with the device 1 installed on the road surface RS 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 perpendicular to one another, 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 the 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 explanation, the positive direction of the X-axis is defined as the leftward direction, the positive direction of the Y-axis as the forward direction, and the positive direction of the Z-axis as 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] Heating unit 2a has a lid 3a and a frame 51a that contacts the bottom of lid 3a and supports lid 3a. Heating unit 2b has a lid 3b and a frame 51b that contacts the bottom of lid 3b and supports lid 3b. Frames 51a and 51b both have a rectangular frame shape and are joined together with their long sides aligned to form a base 5.

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

[0013] The lid body 3 has a generally quadrangular pyramid shape with four side faces. 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. It is preferable that the side panels 31, 32, 33, and 34 of the lid body 3 and the top plate 35 are joined together without any gaps by welding or the like.

[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 the cylinder attachment section 8, which will be described later. 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 Figure 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 forms an air entrainment space that introduces outside air into the introduction pipe 36. That is, when the burner body 21 burns gas, a hot air current is blown along the horizontal portion 36a, and the negative pressure generated by this hot air current causes outside air to be introduced into the horizontal portion 36a through the gap between the introduction pipe 36 and the burner body 21. This allows a large volume of hot air to be sent from the burner body 21 into the inside of the lid 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 gas pipe (not shown) connecting the burner body 21 and the gas cylinder 22 can be easily routed.

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

[0020] The adjusting 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 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 with other types of holes. There are no restrictions on the size of the holes in the perforated plate 53, but the opening 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 bilaterally symmetrical to the heating unit 2a and has the same configuration as 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 inner dimensions 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 adjusting plate 37 is smaller than the cross section 30, and is smaller than the cross section 30 in both the left-right and front-rear directions of the road surface heating device 1. The adjusting plate 37 is also generally diamond-shaped, and the longitudinal direction of the adjusting plate 37 is parallel to the short sides of the lid body 3. For this reason, gaps are formed around the adjusting plate 37 and between it and each of the side plates 31, 32, 33, and 34 of the lid body 3. The adjusting plate 37 is desirably larger than the opening 35a, and it is preferable that the adjusting plate 37 cover the area directly below the opening 35a.

[0028] 3, the flow of hot air blown into the inside of the lid 3 from the inlet pipe 36 is shown schematically by white arrows. 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 hits adjustment plate 37, diffuses inside lid body 3, and moves to the bottom of lid body 3 through the gap around adjustment plate 37.

[0030] The hot air that reaches the bottom of the lid body 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 emitted 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 been heated to a high temperature by the hot air. Therefore, the entire road surface RS located below the lid body 3 is heated without causing any significant temperature imbalance.

[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 spreading the hot air over almost the entire inside of the frame body 51. In addition, the perforated plate 53 allows the hot air to flow out little by little onto the road surface RS through holes formed in the perforated plate 53, thereby supplying the hot air evenly to the road surface RS. In addition, since the hot air spreads throughout the space above the perforated plate 53, the perforated plate 53 becomes hot, and the radiant heat thereof heats the road surface RS.

[0033] Furthermore, since the adjustment plate 37 is disposed directly below the opening 35a, the hot air flowing downward from the opening 35a is caused to collide with the adjustment plate 37, thereby slowing down the flow rate of the hot air and dispersing the hot air more 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 portion 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 dimensions 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 on the frame body 51 by a shaft 63. A ground contact protrusion 64 is formed on one end of the support plate 62, protruding forward of the wheels 61 in the Y-axis direction.

[0037] Hereinafter, 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 the traveling position, and the second position is referred to as the stopping 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. When the four caster units 6a to 6d are 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 front-to-rear 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 reclined position close to horizontal. When the caster unit 6 is in the traveling position, the lever 65 is rotated in the direction indicated by the arrow M1 in the figure and raised, and the support plate 62 together with the lever 65 rotates about the shaft 63 and moves to the stop position.

[0041] In the stopped position, the ground contact protrusions 64 formed on one end of the support plate 62 protrude below the wheels 61 and come into contact with the road surface RS. When the ground contact protrusions 64 come into contact with the road surface RS, the wheels 61 separate from the road surface RS. Therefore, when the caster unit 6 is in the stopped position, the road surface heating device 1 does not move due to friction between the ground contact protrusions 64 and the road surface RS. Also, in the stopped position, when the ground contact protrusions 64 are in contact with the road surface RS, a gap is created between the road surface RS and the frame body 51. Post-combustion air can escape from inside the heating units 2a and 2b through this gap. This allows the combustion gas and air sent from the burner body 21 to the heating units 2a and 2b to escape, thereby achieving a balance of air inside the heating units 2a and 2b.

[0042] When the caster unit 6 is in the stopped position, by rotating the lever 65 in the direction indicated by the arrow M2 in the figure and tilting it down, the support plate 62 rotates around the shaft 63 together with the lever 65 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. Furthermore, 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 desirable to set the caster unit 6 in the stopped position so that the road surface heating device 1 does not move. In this case, it is preferable to set at least two or more caster units 6 in the stopped position.

[0044] As shown in Figure 3, in the stopped 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, making it easier for the hot air inside the lid body 3 to escape. This reduces the airflow resistance when the burner device 20 supplies hot air, and is expected to have the effect of not interfering with combustion in the burner device 20. The distance between the lower end of the perforated plate 53 and the road surface RS in the stopped 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 their 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 section 8. As shown in Figures 1 and 3, the cylinder mounting section 8 has a circular frame 81 that holds the circumferential surface of the gas cylinder 22, a bottom support section 82 that supports the bottom of the gas cylinder 22 from below, and columns 83 that fix the circular frame 81 and the bottom support section 82 to the frame body 51. With the gas cylinder 22 mounted on the cylinder mounting section 8, the road surface heating device 1 can be moved together with the gas cylinder 22.

[0047] As shown in Figure 1, road surface heating device 1 has a cylinder mounting part 8a arranged in heating unit 2a and a cylinder mounting part 8b arranged in heating unit 2b. By providing cylinder mounting parts 8 in each of heating unit 2a and heating unit 2b in this way, fuel gas can be supplied from gas cylinder 22 to each of burner bodies 21 in heating unit 2a and heating unit 2b. In addition, the gas pipe connecting gas cylinder 22 and burner body 21 can be easily routed.

[0048] The road surface heating device 1 can be used, for example, to heat the asphalt pavement of roads, including carriageways. The road surface heating device 1 can be moved in the front-to-rear direction using the caster units 6. For this reason, the width of the road surface heating device 1, i.e., the size of the base 5 in the X-axis direction, preferably corresponds to the width of the road lanes. 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 the 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 direction of the lane extension.

[0049] An example of an operation using the road surface heating device 1 is the formation of grooves in the road surface RS. This operation is also called grooving. An example of the process of 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 the 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 the stop 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 determined appropriately depending on the road surface temperature, air temperature, and weather before construction. For example, there is a method of measuring the temperature of the road surface RS directly below the road surface heating device 1 (road surface temperature) and continuing heating until the target temperature is reached. In the fourth step, the caster units 6 of the road surface heating device 1 are switched to the travel position, making the road surface heating device 1 movable. In the fifth step, the road surface heating device 1 is moved to expose the heated road surface RS. In the 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 jig (template) made of steel materials combined to match the groove pattern against the road surface RS, thereby partially recessing the road surface RS. In this method, for example, a work vehicle equipped with a pressing jig is moved onto the heated road surface RS, and the work vehicle then presses down on the pressing jig to press the road surface RS. Another example of a variation of this method is a method in which a crane is used to install a pressing jig on the road surface RS, and a forward / backward plate is used to press the pressing jig, thereby partially recessing the road surface RS.

[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 jig 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 jig 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 forming grooves by partially cutting the road surface RS with a cutting tool having a cutter bit. In this case, cutting may be performed while a work vehicle equipped with the cutting tool is driven over 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 is cut after being softened by heating, cutting can be performed quickly and to a sufficient depth compared to cutting a cold road surface RS, and the construction time is 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. Furthermore, since the road surface heating device 1 heats the road surface RS in the construction area without significant bias, there is an advantage in that there is little unevenness in the hardness of the road surface RS and construction can be performed more easily 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 splashing when the road surface RS is wet. Furthermore, it is possible to improve the retention effect of antifreeze sprayed on the road surface RS, thereby improving the durability of the antifreeze effect.

[0056] In the above embodiment, the road surface RS is an example of an existing road surface, and 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 whose underside is open toward the road surface RS and which has rotatable wheels 61 supported at the four corners of the underside so that they can move up and down. The road surface heating device 1 also includes a burner device 20 that is arranged at the top of the heating device main body 2 and is configured to be able to supply hot air into the heating device main body 2. The road surface heating device 1 also includes a perforated plate 53 that is arranged at the bottom of the heating device main body 2 and rectifies the hot air from the burner device 20 and directs it evenly onto 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, the hot air is guided evenly by the perforated plate 53. This allows the road surface RS in the area that overlaps with the road surface heating device 1 to be heated evenly. The road surface heating device 1 is movable on wheels 61, and a wide area of ​​the road surface RS can be heated while the road surface heating device 1 is moved. Therefore, the hot air supplied by the burner device can be guided evenly 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, making it easier to work on an existing road surface.

[0059] In the road surface heating device 1, the heating device main body 2 has a lid body 3 formed in an approximately quadrangular pyramid shape, and a burner device 20 is placed 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, thereby making it possible to heat a wide range of the road surface RS 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 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 placed inside the frame 51 facing the underside 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 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 inlet 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 road pavement can be efficiently heated and constructed.

[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 merely an 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, this can be achieved by arranging caster units 6 at the four corners of the frame 51 of either the heating unit 2a or the heating unit 2b. The road surface heating device 1 may also have three or more heating device bodies 2 connected together in the X-axis direction. The number of heating device bodies 2 may be determined based on the width of the heating device bodies 2 in the X-axis direction and the width of one lane of the road surface RS. Furthermore, the road surface RS heated by the road surface heating device 1 is not limited to asphalt pavement. For example, the road surface heating device 1 can be used to heat any paved road surface that is easier to work on when heated.

[0066] In the above embodiment, a configuration in which one perforated plate 53 is arranged inside the frame body 51 has been described, but this is just 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 gap between each other, or adjacent perforated plates may be overlapped so that there are no gaps between them. 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 any other shape.

[0067] In the above embodiment, the road surface heating device 1 has a cylinder mounting section 8 and is configured to be able to mount a gas cylinder 22, but it may also be configured such that the gas cylinder 22 placed 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. Furthermore, 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 able to mount 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 that make up the lid body 3 are made of metal plates, and the frame body 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 requirements. Furthermore, modifications such as providing insulation to the side panels 31, 32, 33, 34 are also possible, and other detailed configurations can also be changed as desired. [Explanation of symbols]

[0070] 1 Road heating device 2 Heating device body 2a, 2b heating units 3, 3a, 3b lid body 5 base 6, 6a, 6b, 6c, 6d Caster Unit 8, 8a, 8b Cylinder attachment part 9 Handle 20 Burner device 21 Burner body 22 Gas Cylinder 30 cross sections 31, 32, 33, 34 side plate 35 Top plate 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 axes 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 wheels and a handle, which is formed so as to be movable on an existing road surface by grasping and pushing the handle; a burner device disposed on the top of the heating device body and configured to be able to supply hot air into the heating device body; Equipped with When the existing road surface is being heated by hot air, the gap between the lower end of the heating device body and the existing road surface is set larger than when the handle is being held and the heating device body is being pushed. Road heating device.

2. An adjustment plate is provided near the center of the height direction within the heating device body, which collides the hot air from the burner device and diffuses the hot air into the upper space, and an airflow adjustment member is provided at the bottom of the heating device body, which rectifies the hot air moving from around the adjustment plate to the lower space of the heating device body and directs it approximately evenly onto the existing road surface. The road surface heating device according to claim 1.

3. The adjustment plate is supported by a plurality of beam members inside the heating device body, The airflow adjusting member rectifies the hot air passing between the beam members and moving into the lower space of the heating device main body, and guides it approximately evenly onto the existing road surface. The road surface heating device according to claim 2.

4. An opening through which hot air from the burner device flows is formed at the top of the heating device body, the adjustment plate is larger than the opening, and the area directly below the opening is covered by the adjustment plate.

4. A road surface heating device according to claim 2 or 3.

5. The heating device body is formed by connecting a plurality of heating units side by side, Each heating unit includes a cover formed in a substantially quadrangular pyramid shape and a frame disposed below the cover, The burner device is provided on the top of each of the lids. The road surface heating device according to claim 4.

6. The heating unit is narrower than the width of one lane of the existing road surface, When the plurality of heating units are connected side by side, the heating device body has a width equivalent to the width of one lane of the existing road surface. The road surface heating device according to claim 5.

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

Images