On-vehicle melting device for asphalt paving material

Abstract

To provide an on-vehicle melting device capable of supplying a prepared asphalt paving material without changing its composition and amount.SOLUTION: An on-vehicle melting device includes: a tank 3 storing a charged asphalt paving material M; a gas burner 7 attached on the tank 3 to heat and melt the asphalt paving material M stored in the tank 3; wheels 91 and parallel rails 92 installed on a loading deck L of a vehicle to allow the tank 3 to move between a retreated position at the inside of the loading deck L and a progressed position where a part of a bottom wall of the tank 3 protrudes outside of the loading deck L; and an outlet 31 and a plate-like valve disc 8 provided in a part of the bottom wall to allow the melted asphalt paving material M in the tank to be dropped and discharged upon opening.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an in-vehicle melting device for asphalt paving materials that enables the preparation of asphalt paving materials at road repair sites and the like.

Background Art

[0002] As this type of in-vehicle melting device, for example, Patent Document 1 proposes an asphalt mixer composed of an aggregate supply means, a filler supply means, an asphalt supply means, etc., mounted on the loading platform of a truck. In this case, when transferring the asphalt paving material (ascon) adjusted by the asphalt mixer located on the loading platform to a handcart, a shooter (reference numeral 35 in FIG. 3) is frequently used as shown in Patent Document 1.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, the applicant has developed and used ascon (applicant's registered trademark "E·R Ascon") that can be quickly adjusted simply by mixing and heating and melting a binder with aggregates. However, since the binder of the above ascon contains an asphalt component and has a high viscosity, it easily adheres to the shooter. For this reason, there has been a problem that the amount of the binder in the ascon supplied to the handcart decreases, resulting in a deterioration in its quality, or the supplied ascon becomes less than the desired amount.

[0005] Therefore, the present invention solves such problems, and an object thereof is to provide an in-vehicle melting device for asphalt paving materials that can supply the prepared asphalt paving materials without changing the components and their amounts.

Means for Solving the Problems

[0006] In order to achieve the above object, the present invention includes a tank (3) for storing the input asphalt paving material (M), heating means (7) attached to the tank (3) for heating and melting the asphalt paving material (M) stored in the tank (3), and a guide means (91, 92) installed on the loading platform (L) of the vehicle to make the tank (3) movable between a retracted position inside the loading platform (L) and an advanced position where at least a part of the bottom wall of the tank (3) protrudes outside the loading platform (L), and gate means (31, 8) provided on a part of the bottom wall and capable of dropping and discharging the melted asphalt paving material (M) inside when opened.

[0007] Preferably, the guide means is composed of wheels (91) attached to the tank (3) and rolling on parallel rails (92) provided on the loading platform.

[0008] Preferably, the tank (3) is provided with stirring means (6) for stirring the melted asphalt paving material (M) in the tank (3).

[0009] Preferably, the gate means is composed of a discharge port (31) provided on a part of the bottom wall and a plate-shaped valve body (8) that moves across the discharge port (3) to open and close it.

[0010] The reference numerals in the above brackets are shown for reference in relation to the corresponding specific means described in the embodiments described later.

Advantages of the Invention

[0011] According to the present invention, after the asphalt paving material in the tank is melted by the heating means, it becomes possible to move the tank to the advancing position by the guiding means. When the gate means is opened at the advancing position, the melted asphalt paving material directly drops and is discharged from the tank onto a handcart or the like positioned below. Since there is no need to use a shooter in the present invention, it is possible to solve the conventional problems such as the components of the asphalt paving material adhering to the shooter and the components of the asphalt paving material supplied to the handcart or the like fluctuating, resulting in a decrease in quality, or the supply amount decreasing.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0013] FIG. 1 shows a plan view of the on-vehicle melting device, and FIG. 2 shows its vertical sectional view. The on-vehicle melting device has a rectangular frame body 1 provided with columns at the four corners, and each of the columns 11 is connected by a cross beam 12 at the lower end and the upper end. Inside the inner space of the frame body 1, a bottomed cylindrical outer body 2 provided with a heat insulating material 21 (FIG. 2) of a predetermined thickness on the inner wall surface is provided, and inside the upper half of the outer body 2, a bottomed cylindrical inner body is located and this becomes the tank 3.

[0014] The opening of the tank 3 is covered with a lid 4 provided with a heat insulating material 41 of a predetermined thickness. One corner of the lid 4, the semi-circular portion 41 (FIG. 1), can be rotated and opened upward by a U-shaped handle 42, and it serves as an opening and closing part for charging the asphalt material into the tank 3. FIG. 3 shows a plan view of the tank 3 with the lid 4 removed.

[0015] A parallel beam 13 is installed between the central parts of the cross beams 12 at the upper end of the frame body 1, and a rotary speed reducer 5 with a motor 51 is mounted between the central parts of these parallel beams 13. The main shaft 61 of the stirring fan 6 is connected to the output shaft 52 (Figure 2) that protrudes downward from the rotary speed reducer 5. From the middle position of the main shaft 61, reverse L-shaped support shafts 62 and 63 extend in the symmetric radial direction, and flat plate-shaped wing bodies 621 and 631 are respectively provided at the lower ends of the support shafts 62 and 63, being provided close to perpendicular to the bottom wall of the tank 3.

[0016] When the main shaft 61 rotates, the wing body 621 moves in a circular trajectory C1 (Figure 3) along the outermost peripheral wall of the tank 3, and the wing body 631 moves in a circular trajectory C2 inside it. A flat plate-shaped wing body 611 is provided close to perpendicular to the bottom wall of the tank at the lower end of the main shaft 61. When the main shaft rotates, the wing body 611 moves in a circular trajectory C3 along the innermost peripheral wall of the tank 3. Also, at an intermediate part near the lower end of the main shaft 61, stirring rods 612 that protrude to almost the same circumferential position as the tip of the wing body 611 are provided on both sides of the outer periphery.

[0017] The inner space of the outer housing 2 below the tank 3 is a heating chamber 22 (Figure 2). A gas burner 7 is provided on the peripheral wall of the outer housing 2 facing the heating chamber 22, and its air outlet 71 opens into the heating chamber 22. The bottom wall part of the tank 3 outside the heating chamber 22 is curved inward in an arc shape to form a discharge port 31 (Figure 3). And a plate-shaped valve body 8 formed in a fan shape with a diameter slightly larger than that of the discharge port 31 is in contact with the discharge port 31 from below to close it.

[0018] The plate-shaped valve body 8 is pivotally supported around its central axis 81, and the base end of an operating rod 82 extending in the tangential direction of the outer periphery of the tank 3 is joined to one side of it. Thus, by rotating the operating rod 82 counterclockwise when viewed from above from the state of Figure 1 to the state of Figure 3, the plate-shaped valve body 8 can be rotated to open the discharge gate 31. The operation of the motor 51 and the combustion control of the gas burner 7 are performed by a control panel 14 (Figure 2) installed on the frame body 1.

[0019] At both lower ends on the left and right sides (upper and lower sides in FIG. 1) of the frame body 1, wheels 91 are provided at two locations in the longitudinal direction on each cross beam 12 (FIG. 2) extending in the front and rear directions (left and right directions in FIG. 1). On the other hand, a pair of parallel rails 92 fixedly installed on the vehicle loading platform L (FIG. 4) are provided, and the wheels 91 are respectively positioned on these parallel rails 92 (FIG. 4), and the entire frame body 1 can move in the left and right directions in FIG. 1 along the parallel rails 92. The moving operation of the frame body 1 is manually performed by grasping the handle 15 (FIG. 2) provided thereon.

[0020] Guide plates 93 are respectively provided along the outside of each parallel rail 92, and a regulating plate 931 (FIG. 4) protruding inward from the guide plate 93 is positioned close to the upper side of the rear wheel 91 to prevent its lifting. As shown in FIG. 2, the parallel rails 92 are installed inward from the end L1 of the vehicle loading platform L. As a result, at the advanced position shown in FIG. 2 where the frame body 1 is pulled out and moved, a part of the bottom wall of the tank 3 provided with the discharge gate 31 protrudes outside the loading platform L.

[0021] When using the in-vehicle melting device having the above structure, the frame body 1 is pushed into the retracted position inside the vehicle loading platform L (arrow in FIG. 2). In this state, the opening / closing lid 41 of the tank 3 is opened, and a predetermined amount of aggregate and binder as the ascon material are loaded into the tank 3. Then, the gas burner 7 in the heating chamber 22 is ignited to melt the ascon material in the tank 3 into ascon. At this time, the stirring fan 6 is rotated simultaneously to knead the melted ascon.

[0022] With the ascon sufficiently melted and kneaded, the frame body 1 is pulled out to the advanced position (state in FIG. 2), the discharge gate 31 of the tank 3 is positioned outside the loading platform L, and after placing the handcart V (FIG. 5) below the discharge gate 31, the plate-shaped valve body 8 is opened and rotated by the operating rod 82 (state in FIG. 3). As a result, as shown in FIG. 5, the melted ascon M in the tank 3 directly drops and is discharged to the lower handcart V through the discharge gate 31.

[0023] As described above, according to the in-vehicle melting device described in this embodiment, the melted ascon M can be directly discharged to the handcart V below without using a shooter. Therefore, it is possible to avoid the problem that the binder adheres to the shooter as in the prior art, the amount of the binder in the ascon decreases, and its quality deteriorates. Further, according to this embodiment, there is no problem of taking time to remove the binder adhering to the shooter as in the prior art.

[0024] Note that the above embodiment aims to solve the problems that the binder adheres to the shooter and the components of the ascon fluctuate or the supply amount decreases. Generally, a part of the ascon often adheres to the shooter, and the present invention is applicable not only to "E·R ascon" but also widely to general ascon.

Explanation of reference numerals

[0025] 1... frame body, 2... outer body, 3... tank, 31... discharge port, 6... stirring fan (stirring means), 7... gas burner (heating means), 8... plate-like valve body, 91... wheels, 92... parallel rails, L... loading platform, M... ascon (asphalt paving material).

Claims

1. A vehicle-mounted melting device for asphalt paving materials, comprising: a tank for storing the input asphalt paving materials; heating means attached to the tank for heating and melting the asphalt paving materials stored in the tank; guide means installed on the loading platform of the vehicle to enable the tank to move between a retracted position inside the loading platform and an extended position where at least a part of the bottom wall of the tank protrudes outside the loading platform; and gate means provided on a part of the bottom wall to enable the melted asphalt paving materials inside to fall and be discharged when opened.

2. The vehicle-mounted melting device for asphalt paving materials according to Claim 1, wherein the guide means is composed of wheels attached to the tank and rolling on parallel rails provided on the loading platform.

3. The vehicle-mounted melting device for asphalt paving materials according to Claim 1, wherein the tank is provided with stirring means for stirring the melted asphalt paving materials in the tank.

4. The vehicle-mounted melting device for asphalt paving materials according to Claim 1, wherein the gate means is composed of a discharge port provided on a part of the bottom wall and a plate-shaped valve body that moves across the discharge port to open and close it.

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