JP2003184027A - Apparatus and method for cutting pavement surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for cutting a pavement surface, which facilitates removal of a road cut portion cut out from the pavement surface, prevents read damage after repairing the same, easily and inexpensively cools a blade for cutting the pavement surface, and can collect cutting dust generated at the time of cutting, and to provide a method for cutting the pavement surface. <P>SOLUTION: The apparatus for cutting the pavement surface is comprised of a disk blade 27, a cover 30, and a sucking-type dust collector 45. The blade 27 is attached to a chassis traveling on the pavement surface R, and driven for rotation by a driving means 20 mounted in the chassis, to thereby diagonally cut the pavement surface R while being rotated along a chassis traveling direction. The cover 30 covers the periphery of the blade 27. The dust collector 45 is mounted on the chassis. According to the apparatus, a suction port of the sucking-type dust collector 45 is opened in an upper portion of the cover 30, and cutting dust scattering in the cover 30 is collected from the suction port via the hose 16 into a cutting dust accumulating container 15. At the same time, the blade 27 is cooled by air flow generated by suction of the cutting dust. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement road cutting device and method, and more particularly, to a disk mounted on a vehicle body running on a pavement surface when repair work is required on the pavement surface such as asphalt or concrete. It is used for cutting the pavement road surface to a required depth while rotating a blade in a circular shape, removing the cut portion, and filling the removed portion again with asphalt or concrete for repair.

[0002]

2. Description of the Related Art Conventionally, in this type of paving road surface cutting device, a road surface cutting blade pivotally supported on a vehicle body is run while being rotated by an engine mounted on the vehicle body, and the paved road surface is cut to a required depth by the blade. I am cutting.

In the above-mentioned paved road surface cutting device, there is a problem that the blade for cutting the paved road surface is overheated and cutting dust is generated. To address this problem, the applicant of the present invention has previously disclosed Japanese Patent Laid-Open No.
No. 302613 proposes a paving road surface cutting device including a cooling device for blowing a liquefied gas onto a blade. In the cutting device 1, as shown in FIG. 10, the blade 3 is rotatably supported on the front side of the vehicle body 2, and
The vehicle body 2 has a liquefied gas cylinder 4, the cylinder 4 and a blade 3
A hose 5 which is piped between the two is mounted on the blade 3 which cuts the paved road surface R while rotating, and the injection device 6
As a result, the liquefied gas in the cylinder 4 is blown through the hose 5 to cool the blade 3.

[0004]

However, as shown in FIG.
Two problems occur in the cutting device 1 shown in FIG. First
In FIG. 11, the disk-shaped blades 3 are arranged vertically with respect to the paved road surface R, and the approach angle of the blade with respect to the paved road surface is straight, so that the cutting surface is vertical as shown in FIG.
If the cutting surface of the road surface cutting portion Ra is vertical, the road surface cutting portion R
Not only is it difficult to remove a, but it also becomes difficult to remove if it falls due to its own weight. Further, when the removed portion is filled with asphalt or concrete for repair, the joint becomes vertical, and road damage such as cracks and cracks is likely to occur at this joint.

Secondly, in the case of the cooling system in which the liquefied gas is injected to the blade 3, the cost of the liquefied gas is high and the maintenance such as procurement and replacement of the liquefied gas cylinder 4 is troublesome.

The present invention has been made in view of the above-mentioned problems, and a road surface cut portion separated from a paved road surface can be easily taken out from the paved road surface so that cracks do not occur on the road surface even after repair, Another object is to make it possible to cool the blade for cutting the road surface easily and at a low cost and to collect the cutting powder.

[0007]

In order to solve the above-mentioned problems, the present invention is mounted on a vehicle body running on a paved road surface and is rotationally driven by a drive means mounted on the vehicle body. A disk-shaped blade that cuts the paved road surface while rotating, a cover that covers the outer periphery of the blade, and a suction dust collector mounted on the vehicle body, and the suction port of the suction dust collector is located above the cover. At the same time, the cutting powder scattered in the cover is collected from the suction port to the cutting powder storage container through the hose.
A cutting device for a paved road surface, characterized in that the blade is cooled by a flow of air accompanying suction of cutting powder.

According to the above cutting device, since the blade is inclined, the paved road surface can be cut obliquely and the cross section of the road surface cutting portion is gradually cut from the upper side to the lower side. can do. as a result,
The cut surface is inclined, and after removing the road surface cut portion, when the removed portion is filled with asphalt or concrete and repaired, the seam becomes oblique, so road surface damage such as cracks and cracks is less likely to occur . Further, since the cut road surface portion becomes smaller toward the lower side, it cannot be lowered due to its own weight, and the cut surface is inclined,
It becomes easy to remove the cut portion.

When cutting the paved road surface while rotating the blade, the cutting dust generated by the suction dust collector is sucked with a strong suction force from the suction port communicating with the cover covering the outer periphery of the blade. Because it continues to collect dust,
The cutting powder does not scatter on the road surface to contaminate the road surface, and no environmental problems occur during construction work. Moreover, at the same time, the blade is cooled by the strong suction by the suction dust collector.

The above blade is attached to one side or both sides of the front end of the vehicle body, and its rotating direction is counterclockwise so as to rotate from the lower side to the upper side in the cutting direction. It is made to fly up and scatter inside the cover. Incidentally, conventionally, the blade is rotated clockwise in the opposite direction to scatter the cutting powder to the rear in the cutting proceeding direction, but with this configuration, the cutting powder scatters toward the vehicle body side, There is a problem that cutting powder accumulates between the lower part and the road surface.

A blower is used as the suction dust collector, and the blower is connected to the cutting powder storage container via a hose,
The cutting powder accumulating container is connected to the upper suction port of the cover via a hose, and the cover is arranged with a gap for intake between the paved road surface and the suction force generated by driving the blower and the cover. The cutting powder scattered in the cover is sucked into the cutting powder accumulating container via the hose by suction from a gap between the cutting surface and the paved road surface. By using a blower as the suction dust collector, the cost can be reduced as compared with the case where a compressor is used.

Further, a filter is built in the cutting powder accumulating container so that the cutting powder is accumulated in the cutting powder accumulating container so that the intake air sucked by the blower through the hose does not contain the cutting powder. There is. If the exhaust from the blower is discharged into the cover surrounding the blade, cooling of the blade can be further promoted.

With the above structure, when a gap for intake is provided between the lower end of the cover and the paved road surface, a sufficient amount of fresh air constantly enters through the lower opening of the blade and passes through the inside of the cover to reach the upper part of the cover. It rapidly flows into the communicating suction port. Therefore, the blade is always exposed to a rapid flow of a sufficient amount of cold air to be cooled efficiently. In this way, the blade heated to a temperature of 600 ° C. to 800 ° C. due to friction with the paved road surface can be easily cooled with no cost or effort by only the flow of air sucked by the cutting powder. it can.

The cover is attached to the frame so as to be movable up and down and / or swingable, and a roller for sliding the road surface is attached to the lower portion of the cover, and the lower side portion of the roller is projected from the lower end of the cover for paving. It is preferable to provide the above-mentioned air intake gap with the road surface.

In order to prevent the cutting powder from scattering outside, it is preferable that the lower end of the cover be as close as possible to the paved road surface. However, if the lower end surface of the cover is grounded, the atmosphere cannot be sucked in. Therefore, the cover is attached to the frame so that it can move up and down and / or swing as described above, and the roller at the lower end is always grounded by its own weight, and By making the lower protruding portion of the roller protrude from the lower end of the cover, a gap for intake is secured. And,
By attaching the roller for sliding contact with the paved road surface, it is possible to prevent noise and wear of the cover by preventing the lower end surface of the cover from directly sliding contact with the paved road surface.

As a structure for inclining the blade with respect to the paved road surface, the blade and the cover for covering the blade are provided in the cutter unit, the frame of the cutter unit is at the front of the vehicle body frame, and the vehicle traveling direction is the rotation axis. By rotatably connecting and mounting the cutter unit at an angle to the body frame,
The blade of the cutter unit is inclined with respect to the paved road surface.

That is, by rotating the cutter unit as a whole with respect to the body frame that is not tilted, the cutter unit turns and the blades provided in the cutter unit are tilted obliquely. Further, as a transmission means between the drive source mounted on the body frame and the blade,
Power is transmitted to a pulley via a belt or a chain, and when the cutter unit is tilted, the belt or chain is twisted by an amount corresponding to the tilt.

Specifically, an inner pipe is provided so as to project from the front end of the vehicle body frame, and an outer pipe rotatably fitted to the inner pipe is provided at the rear end of the frame of the cutter unit, while the cutter unit is attached to the cutter unit. The rotational force is transmitted between the first rotating shaft provided and the output shaft of the drive source mounted on the vehicle body frame through a belt or a chain passing through the inner pipe, and the rotation of the first rotating shaft of the cutter unit causes the inside of the cutter unit to rotate. The blade is rotatably driven via the transmission mechanism provided in the above, and the belt or chain is twisted when the cutter unit is tilted.

The first rotating shaft is rotatably supported by the left and right frames of the frame of the cutter unit, and
The upper end of the swing arm is swingably attached to the rotary shaft,
A second rotating shaft is rotatably mounted on the lower end of the swing arm, and the blades are fixed to the left and right ends of the second rotating shaft,
The transmission mechanism including a pulley and a belt or a chain is interposed between the second rotary shaft and the first rotary shaft, and the swing arm is fixed to a piston rod tip of a hydraulic cylinder attached to a frame of a cutter unit. Then, the swinging arm is swung by the expansion and contraction of the piston rod to adjust the cutting depth.

When blades are attached to both left and right ends of the second rotating shaft, when the cutter unit is rotated and tilted in one direction with respect to the vehicle body frame, one of the left and right sides inclines in the grounded state, and the other side. Cuts off one side of the paved road surface with a blade that floats above the road surface and is in contact with the ground. When cutting the other side of the paved road surface, the cutter unit is inclined in the opposite direction and the blade on the other side is grounded. When the traveling direction of the vehicle body is reverse, even if the blade is provided only on one side, both sides of the paved road surface facing each other can be cut obliquely.

By providing the swing arm which is swung by the hydraulic cylinder, the piston rod of the hydraulic cylinder is extended and swung in the direction of approaching the road surface together with the second rotating shaft, and the depth of the road surface cut by the blade is increased. On the other hand, when the piston rod of the hydraulic cylinder is retracted to swing it away from the road surface,
The cutting depth of the road surface can be reduced by the blade attached to the rotating shaft.

Further, according to the present invention, the cutting blade is obliquely cut into the pavement by advancing it obliquely, and the cutting powder generated during the cutting is sucked by a suction dust collector, and the suction is performed. There is provided a method for cutting a paved road surface, in which the cutting blade is cooled by a flow of air accompanied by.

[0023]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the pavement road cutting device 10 includes front wheels 21 and rear wheels 18 on the lower, front, rear, left and right sides of a vehicle body frame 22, and inside the vehicle body frame 22 a traveling drive source and a blade 27 described later. And an engine 20 serving as a rotation drive source for the blower 13. The output of the engine 20 is the speed reducer 1 using a belt or the like.
It is of a self-propelled type that is transmitted to a rotary shaft (drive shaft) 26 of the rear wheel 18 via 9.

A pair of left and right operation rods 23 horizontally projecting rearward from both left and right sides are provided on the upper rear side of the vehicle body frame 22, and a worker holds the left and right operation rods 23 to operate the traveling direction. I have to. The vehicle body is the engine 20.
Instead of the self-propelled type, a manual push type may be used in which a worker holds the operation rod 23 to travel.

The frame 31 of the cutter unit 12 is connected to the front portion of the vehicle body frame 22. As shown in FIG. 2, the outer cylinder 31a provided on the rear surface of the frame 31 of the cutter unit 12 is externally fitted to the inner cylinder 22a protruding from the front surface of the vehicle body frame 22, and as shown in FIG.
Lubricating oil O is interposed between the outer cylinder 31a and the inner cylinder 22a so as to be rotatable.

As shown in FIG. 3, a tilting handle 41 is projected upward from the frame 31, and the tilting handle 4 is
By turning while holding 1 the cutter unit 12 can be tilted at the tilt angle θ. In the present embodiment, the range of the tilt angle is 0 ° ≦ θ ≦ 35 ° on the left and right, and the tilt angle display section 42 attached to the frame 31.
You can check it at. The tilt angle display unit 42
Is a protractor 42 fixedly attached to the frame 31.
An indicator 42b is rotatably attached to a, and the fact that the indicator 42b is always in the vertical direction due to gravity is used to measure the reading angle of the scale at the tip 42b-1.

A first rotating shaft 36 is rotatably mounted between left and right side frames 31b of the frame 31 of the cutter unit, and a pulley 37 attached to the first rotating shaft 36 and an engine attached to the vehicle body frame 22. The belt B1 is stretched between the pulley 20a attached to the output shaft of 20 and
The driving force is transmitted to the cutter unit 12 through the belt B1 through the inner pipe 22a. When the cutter unit 12 is inclined with respect to the vehicle body frame 22, the belt B1 twists and transmits a rotational force.

In the cutter unit 12, the upper ends of swing arms 40 are swingably connected to the left and right sides of the first rotary spindle 36, and the second rotary shaft 39 is rotatably mounted on the lower ends of these swing arms 40. The blades 27 for cutting the road surface are attached to the left and right ends of the second rotary shaft 39, respectively. Pulleys 32 and 28 are fixed to the first rotating shaft 36 and the second rotating shaft 39, respectively, and a belt B2 is bridged between them. By using the transmission mechanism described above, the rotational driving force of the engine 20 is the belt B1 and the first rotating shaft 3
6, the pulley 32, the belt B2, the pulley 28, the second rotating shaft 28, and the blade 27, and the blade 27 is rotated.

The frame 31 of the cutter unit 12
The hydraulic cylinder 43 is rotatably supported on the swing arm 40, and the tip of the piston rod 43a of the hydraulic cylinder 43 is rotatably supported on the swing arm 40. The rotary shaft 36 is swung about as a fulcrum. As a result, as shown in FIG. 4, the second arm connected to the lower end of the swing arm 40
The rotary shaft 39 and the blade 27 are moved toward and away from the paved road surface to adjust the depth of the road surface cut by the blade 27.

Specifically, as shown in (I) of FIG. 4, when the piston rod of the hydraulic cylinder 43 is extended and swung in the direction of approaching the road surface R together with the second rotating shaft 39, the blade 27 The cutting depth of the road surface R can be increased. On the other hand, as shown in (II), when the piston rod of the hydraulic cylinder 43 is retracted and swung in a direction away from the road surface R, the cutting depth of the road surface by the blade 27 attached to the second rotating shaft 39 is reduced. Can be shallow.

The cover is attached to the frame so as to be movable up and down and / or swingable, and a roller for sliding the road surface is attached to the lower part of the cover so that the lower side portion of the roller is projected from the lower end of the cover. The above-mentioned air intake gap is provided between the vehicle and the road surface.

As shown in FIG. 5, a swing hole 29a provided in a slide plate 29 mounted so as not to rotate together with the second rotary shaft 39 is inserted into a support shaft 40b projecting from the swing arm 40. Installed. The swing hole 29a is formed by a pair of V-shaped holes, and the slide plate 29 swings by moving the swing hole 29a along the support shaft 40b, that is, the cover 30 swings. .

FIG. 6 shows a state after the cover 30 is attached, and the cover 30 has a slide frame 30c and a slide plate 29.
It is mounted so that it is slid from above and is covered from above the blade 27. The cover 30 has a cutout 3 for inserting the second rotary shaft 39 so as not to rotate together with the second rotary shaft 39.
0b is provided and the second rotating shaft 39 is loosely inserted. Further, the slide frame 30c of the cover 30 is slidably inserted into the slide plate 29 from above, so that the cover 30 can be moved up and down. A roller 30a for road surface sliding contact is rotatably supported on the lower portion of the cover 30, and a lower side portion of the roller 30a is projected from the lower end of the cover 30 by a required dimension.
Moreover, a handle 30b is provided on the upper surface of the cover 30.

The cover 30 is swingable to the left and right within a required range defined by the slide plate 29, and is vertically movable within the range of the height above the slide plate 29, so that the blade 27 is cut off. The cover 30 moves upward relative to the blade 27 as the depth of the insertion increases, and
The roller 30 is always grounded, and the lower end of the cover 30 and the road surface R
A required air intake gap C is secured between and.

The blade 27, as shown in FIG.
As a counterclockwise rotation that rotates from the lower side to the upper side in the cutting direction X, the cutting powder is blown up to the front upper side in the cutting direction and scattered inside the cover 30.

A suction dust collector 45 is mounted on the vehicle body frame 22 in order to absorb the cutting powder scattered inside the cover 30. The suction dust collector 45 is a blower 13 driven by an engine 20, a cutting powder accumulating container 15 shown in FIG. 8 connected to the blower 13 via a hose 17, and an inlet provided in a lid 14 of the cutting powder accumulating container 15. And a hose 16 connecting the suction port 30c provided on the upper surface of the cover 30 surrounding the blade 27. A filter FT is arranged in the cutting powder accumulating container 15, and the hose 16 connected to the blower 13 is attached at a position after passing through the filter FT. The cutting powder is not sucked into the blower 13 and is stored in the container 15. I'm storing it.

The blower 13 has a fan of 7,000 times /
It has a very strong suction force that rotates at a speed of from min to 8000 times / min. When the blower 13 is started, a large amount of air (outside air) is generated at a high speed in the route of the intake clearance C at the lower end of the cover 30, the inside of the cover 30, the hose 16, the cutting powder accumulating container 15, the lid 14, the hose 17, and the blower 13. Is sucked into.

The lid 14 of the suction dust collector 45 can be opened and closed by a one-touch operation. That is, as shown in FIG. 8, when the lower end of the handle HD whose upper end is pivotally supported by the support bar SB is grasped and turned upward as indicated by an arrow, the lid is closed as shown in FIG. 8B. As the bending rod RD attached to 14 is pulled up along with the handle HD, only the lid 14 is lifted, and the cutting powder accumulating container 1
The lid 14 of 5 opens. If the lid 14 is opened, the cutting powder storage container 1
Take out the cutting powder collected in 5 and dispose of it. When the lid 14 is closed after the cutting powder is cleaned up, the lid 14 is simply pressed against the cutting powder storage container 15 from above.

When the handle 24 provided at the upper right of the rear side of the cutting device 10 is rotated, the device 10 is manually operated to move forward and backward, and both rear wheels 18 are driven by the differential gear 25.
It is also connected by means of which the device can be easily turned. Furthermore, as shown in FIG.
A rod 34 having a pointer guide needle 33 for confirming the traveling direction arranged at the tip is provided on the front side of the, and the rod 34 is tilted horizontally during the cutting work to determine whether the tip of the pointer 33 is aligned with the cutting line. The cutting direction can be confirmed with.

Next, the operation of the paving road surface cutting device will be described. Inclining the cutter unit 13 by the required angle,
The blade 27 is inclined with respect to the road surface. Further, the hydraulic cylinder 43 is operated according to the depth of cut on the road surface to swing the blade 27. After the above adjustment, the vehicle body is run, the engine 20 is driven to rotate the blade 27, and the paved road surface is cut obliquely.

FIG. 9 shows a section of a paved road surface R obtained by cutting the blade 27 of the cutting device 10 in an inclined state. The cutting surface Rc is inclined obliquely, and the opposing cutting surface Rd is the blade 27. Cutting is done by reversing the tilt direction. With respect to the cutting planes Rc and Rd, the cutting machine is run to cut one cutting plane Rc, and then the cutting machine is run again to cut the other cutting plane Rd.

That is, as shown in FIG. 3, the second rotating shaft 39
Is tilted to the left in the drawing so that the right side blade 27 is lifted up and the left side blade 27 is grounded so that the cutting plane R
After cutting c, the second rotary shaft 39 is tilted to the right in the drawing to bring the right blade 27 into contact with the ground surface Rd.
Disconnect. In addition, after cutting the cutting surface Rc, the cutting device U
When turning to reverse the traveling direction to cut the cutting surface Rd, it is sufficient to cut only with the left blade 27 without reversing the inclination direction of the second rotating shaft 39.

As a result, the width of the road surface cut portion Ra is formed in a taper shape that gradually decreases from the upper side to the lower side. As a result, after removing the road surface cutting portion Ra, when the removed portion is filled with asphalt or concrete for repair, since the seam is oblique, road surface damage such as cracks and cracks is less likely to occur, so to speak, it is seamless. It can be repaired. Further, the cut road surface circular cutting portion Ra can be moved upward, but does not descend due to its own weight. Therefore, the cut road surface circular cutting portion Ra can be easily taken out. The cutting device 10 includes the blade 2
7 (cutter unit 12) may be vertically used as in the related art without inclining the cutter unit 12 to cut the circular road surface cutting portion.

At the time of cutting the road surface by the blade 27, the suction dust collector 45 has a strong suction force for the cutting powder generated by the cutting from the suction port of the hose 16 communicating with the cover 30 covering the outer periphery of the blade 27. Continue to collect dust by suction. In this way, the cutting powder is sucked up by the suction dust collector 45 and quickly collected, so that there is no concern that the cutting powder will scatter on the road surface and pollute the road surface.

On the other hand, due to the strong suction force of the blower 13 of the suction dust collector 45, a sufficient amount of fresh air is constantly sucked through the inside of the cover 30 through the air intake gap C below the blade 27, and the upper portion of the cover 30. Rapidly flows into the suction port that communicates with. Therefore, since the blade 27 is always exposed to a sufficient amount of rapid flow of low-temperature air, the flow of air accompanying suction of cutting powder causes friction with the paved road surface R, for example, 600 ° C. The blade 27 heated to 800 ° C. can be efficiently cooled.

If a hose connecting the exhaust port of the blower 13 and the inside of the cover 30 is provided, the exhaust gas discharged from the blower can be applied to the blade 27 to further enhance the cooling effect of the blade 27. As a result, it is possible to prevent the blade 27 from overheating and always cut the road surface with the blade at a sufficient cutting speed.

[0047]

As is apparent from the above description, according to the present invention, the blade that travels along the road surface and cuts while rotating the road surface is inclined.
The paved road surface can be cut diagonally to incline the cut surface of the road surface. Therefore, after repairing, the seam becomes slanted and cracks and cracks are less likely to occur, and the work of removing the cut portion is facilitated.

Further, the cutting device is equipped with a suction dust collector, and is provided with a cover for covering the outer periphery of the blade except the lower part on the paved surface side, and the suction port of the suction dust collector is opened above the cover. Since the cutting powder that is sucked through the inside of the cover and scattered in the cover is collected by the suction dust collector through the suction port, the cutting powder does not scatter on the road surface and the road surface is not soiled. In addition, due to the rapid air flow associated with the suction of the cutting powder, the temperature-raised blade can be cooled easily without any expense or trouble.

By providing a roller for sliding contact with the road surface at the lower end of the cover, an air intake gap can be easily provided between the cover and the road surface. Further, by making the rotary shaft connected to the blade movable up and down by the hydraulic cylinder, the blade can be easily cut into the road surface and pulled up from the road surface.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a cutting device according to an embodiment of the present invention is cutting a paved road surface.

FIG. 2A is a top view of the inside of the cutter unit,
(B) is a cross-sectional view of a joint portion between the cutter unit and the vehicle body frame.

FIG. 3 is an internal front view of a cutter unit.

FIG. 4 is a view showing a swinging mechanism of a blade.

FIG. 5 is a front view of a main part before a cover is attached.

FIG. 6 is a cross-sectional view of essential parts after a cover is attached.

FIG. 7 is a side view of a main part after the cover is attached.

FIG. 8A is a rear view of the cutting device, and FIG. 8B is a rear view showing a state in which the lid of the cutting powder storage container is opened.

FIG. 9 is a cross-sectional view showing a cut state of a paved road surface.

FIG. 10 is a side view showing a schematic configuration of a conventional cutting device.

FIG. 11 is a cross-sectional view showing a cut state of a conventional paved road surface.

[Explanation of symbols]

10 Pavement road cutting device 12 Cutter unit 13 Blower 14 Lid 15 Cutting powder storage container 16, 17 hose 20 engine 22a inner cylinder 27 blades 28, 32 pulleys on both sides 29 Slide plate 30 covers 30a roller 31a Outer cylinder 37 Central pulley 41 Tilt handle 42 Tilt angle display 43 hydraulic cylinder 45 suction dust collector B1, B2 belt G ground R paved road surface Ra road cutting part Rb non-road surface cutting part Rc, Rd cut surface

Claims (7)

[Claims] 1. A disk-shaped blade attached to a vehicle body running on a paved road surface, rotationally driven by drive means mounted on the vehicle body, and diagonally cutting the paved road surface while rotating with the traveling direction of the vehicle body as a cutting direction. A cover for covering the outer periphery of the blade, and a suction dust collector mounted on the vehicle body, the suction port of the suction dust collector is opened in the upper portion of the cover,
Pavement characterized in that the cutting powder scattered in the cover is collected from the suction port to the cutting powder storage container via a hose, and at the same time, the blade is cooled by an air flow accompanying suction of the cutting powder. Road surface cutting device. 2. A blower of the suction dust collector is connected to the cutting powder accumulating container via a hose, and the cutting powder accumulating container is connected to the upper suction port of the cover via the hose, and the cover serves as a paved road surface. A space for intake is placed between the two, and the suction force generated by the drive of the blower and the intake from the gap between the cover and the paved road surface cut the cutting powder scattered in the cover through the hose. The cutting device for a paved road surface according to claim 1, wherein dust is collected in the powder accumulation container. 3. The cover is attached to a frame so as to be movable up and down and / or swingable, and a roller for sliding contact with a road surface is attached to a lower portion of the cover so that a lower portion of the roller is projected from a lower end of the cover. The paving road surface cutting device according to claim 2, wherein the air intake gap is provided between the paving road surface and the paving road surface. 4. The blade and the cover for covering the blade are provided in a cutter unit, and a frame of the cutter unit is rotatably connected to a front portion of a vehicle body frame about a vehicle body traveling direction as a rotation axis. 4. The paving road surface cutting device according to claim 1, wherein the blade of the cutter unit is tilted with respect to the paved road surface by mounting the blade with respect to the vehicle body frame. . 5. An inner pipe protruding from a front end of the body frame, and an outer pipe rotatably fitted to the inner pipe at a rear end of a frame of the cutter unit, and a first pipe provided at the cutter unit. One rotary shaft and an output shaft of a drive source mounted on a vehicle body frame are provided in the cutter unit by transmitting a rotational force through a belt or a chain passing through the inner pipe and rotating the first rotary shaft of the cutter unit. The blade is rotationally driven via a transmission mechanism,
The paving road surface cutting device according to claim 4, wherein the belt or the chain is twisted when the cutter unit is tilted. 6. The first rotary shaft is rotatably supported by the left and right frames of the frame of the cutter unit, and the upper end of a swing arm is swingably attached to the first rotary shaft, and the lower end of the swing arm is supported. A second rotating shaft is rotatably mounted on the second rotating shaft, the blades are fixed to both left and right ends of the second rotating shaft, and a pulley and a belt or a chain are provided between the second rotating shaft and the first rotating shaft. With the above transmission mechanism interposed, the swing arm is fixed to the piston rod tip of a hydraulic cylinder attached to the frame of the cutter unit, and the swing arm is swung by the expansion and contraction of the piston rod to adjust the cutting depth. The cutting device for a paved road surface according to claim 5. 7. A diagonal cutting is performed by inclining and advancing a cutting blade with respect to a pavement road surface, and cutting powder generated during the cutting is sucked by a suction dust collector, and at the same time,
A method for cutting a paved road surface, wherein the cutting blade is cooled by a flow of air accompanying the suction.