JP2015175147A - Road surface cutting device and cutting method of curved slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a road surface in a shape of copying after a curved slope.SOLUTION: Two first cutting drums 320 arranged at a predetermined interval in a vehicle width direction and one second cutting drum 340 arranged in the vehicle width direction so as to fill up between the adjacent first cutting drums 320, are mounted on a base member 260 installed on a vehicle body bottom surface of a self-traveling vehicle. The two first cutting drums 320 can rock (tilt) in a V shape by an expansion cylinder 330 with a rotary shaft 328 positioned on the vehicle width outside as the center. The second cutting drum 340 becomes vertically movable to the base member 260 by the expansion cylinder. A road surface is cut in a shape of copying after the curved slope by properly changing a tilt angle of the first cutting drums 320 and a vertical position of the second cutting drum 340.

Description

  The present invention relates to a road surface cutting apparatus and a curved slope cutting method.

  When renovating a curved slope (bank) such as an automobile test course, a road surface cutting device such as that described in Japanese Patent Application Laid-Open No. 11-148107 (Patent Document 1) is used to determine a predetermined road surface such as asphalt pavement. A method of cutting the depth and paving asphalt mixture on it was used.

Japanese Patent Laid-Open No. 11-148107

  However, since the cutting drum of the road surface cutting device has a cylindrical shape with a uniform cross section, the road surface cannot be cut in a shape that follows a curved slope, and the road surface must be cut deeper than the design value. I had to. When cutting the road surface deeply, leveling work to paving asphalt mixture and the like became indispensable, which caused the construction period to increase and the cost to increase.

  Then, an object of this invention is to provide the road surface cutting apparatus and the cutting method of a curved slope which can cut a road surface in the shape which followed the curved slope.

  The road surface cutting device includes a plurality of first cutting drums arranged at predetermined intervals in the vehicle width direction on the bottom surface of the vehicle body of the self-propelled vehicle, and a first first adjacent to the self-propelled vehicle when viewed from the front-rear direction. At least one second cutting drum disposed in the vehicle width direction is mounted so as to fill the space between the cutting drums. In each of the first cutting drum and the second cutting drum, at least one of the two end portions can be displaced in the vertical direction with respect to the vehicle body of the self-propelled vehicle.

  The curved slope cutting method using the road surface cutting device is a shape that follows the curved slope by displacing at least one of the first and second cutting drums in the vertical direction. The road surface cutting device is run in the direction in which the curved slope extends to cut the road surface.

  According to the present invention, a road surface can be cut in a shape that follows a curved slope.

It is a top view which shows an example of a road surface cutting device. It is a side view which shows an example of a road surface cutting device. It is the elements on larger scale which show an example of the cutting unit. It is the elements on larger scale which show the state of the cutting unit when cutting a curved slope. It is explanatory drawing of the state which starts the cutting operation | work of a curved slope. It is explanatory drawing of the state which is performing the cutting operation of a curved slope.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.
1 and 2 show an example of the road surface cutting device 100.

  The road surface cutting device 100 includes a self-propelled vehicle 200, a cutting unit 300 mounted on the bottom surface of the vehicle body of the self-propelled vehicle 200, and a belt conveyor 400 that discharges road surface waste material cut by the cutting unit 300.

  Self-propelled vehicle 200 has a pair of left and right front wheels 210 and rear wheels 220 driven by, for example, a diesel engine. The pair of left and right front wheels 210 and rear wheels 220 are attached to the vehicle body 230 via a telescopic cylinder 240 that can extend and contract in the vertical direction of the vehicle body 230. Here, as the telescopic cylinder 240, for example, a hydraulic cylinder using hydraulic oil supplied from a hydraulic pump driven by a diesel engine as a drive source can be used (the same applies hereinafter). Therefore, by appropriately controlling the supply and discharge of hydraulic oil to and from the telescopic cylinder 240, the vertical positions of the front wheels 210 and the rear wheels 220 with respect to the vehicle body 230 are changed, and the ground height of the self-propelled vehicle 200 can be arbitrarily changed. .

  A pair of guide rails 250 extending in parallel to the vehicle width direction are attached to the bottom surface of the vehicle body 230, specifically, the bottom surface located between the pair of left and right front wheels 210 and the rear wheel 220. Between the pair of guide rails 250, for example, a base member 260 having a substantially rectangular shape in plan view is slidably attached as a member that suspends and supports the cutting unit 300. The base member 260 slides in the vehicle width direction along the guide rail 250 by, for example, a telescopic cylinder (not shown) that can expand and contract in the vehicle width direction.

  The cutting unit 300 includes two first cutting drums 320 arranged at a predetermined interval in the vehicle width direction of the vehicle body 230 and one second cutting drum arranged behind the first cutting drum 320. A drum 340.

  The first cutting drum 320 includes a substantially cylindrical cutter drum 322 and a plurality of cutter bits 324 detachably attached to the outer peripheral surface of the cutter drum 322. As shown in FIG. 3, both end portions of the cutter drum 322 in the axial direction are rotatably supported while being sandwiched by a substantially U-shaped bracket 326 that opens downward as viewed from the front-rear direction of the vehicle body 230. ing. Note that the first cutting drum 320 is rotationally driven by a hydraulic motor, an electric motor, or the like (not shown).

  As shown in FIG. 3, the upper part of the bracket 326 located outside the vehicle width of the vehicle body 230 is connected to the base member 260 so as to be able to swing (tilt) via a rotation shaft 328 extending in the front-rear direction of the vehicle body 230. Has been. On the other hand, the upper part of the bracket 326 located inside the vehicle width of the vehicle body 230 is connected to the base member 260 via an extendable cylinder 330 that tilts the first cutting drum 320 with respect to the base member 260. Specifically, the base end portion of the telescopic cylinder 330 is fixed to the base member 260 via a rotating shaft 332 extending in the front-rear direction of the vehicle body 230 so as to be slidable. The rod tip portion of the telescopic cylinder 330 is rotatably fixed to an upper portion of a bracket 326 located inside the vehicle width of the vehicle body 230 via a rotation shaft 334 extending in the front-rear direction of the vehicle body 230. Accordingly, when hydraulic oil is supplied to the telescopic cylinder 330 to cause the rod to protrude, the first cutting drum 320 is formed in a V shape around the rotation shaft 328 extending in the front-rear direction of the vehicle body 230 as shown in FIG. Tilt.

  Further, as shown in FIG. 3, a pair of left and right guide members 360 projecting downward is erected on the lower surface of the base member 260 located at an equal distance from the two first cutting drums 320. A movable member 362 that moves up and down along the extending direction of the guide member 360 is attached between the pair of left and right guide members 360. The movable member 362 can rotate to the rotation shafts 334 of the two first cutting drums 320 via two connection members 366 whose upper end portions are rotatably fixed to a rotation shaft 364 extending in the front-rear direction of the vehicle body 230. It is connected to. Therefore, the action of the link mechanism including the guide member 360, the movable member 362, the rotating shaft 364, and the connecting member 366 causes the two first cutting drums 320 to be tilted in a V shape while being synchronized, and the tilt angle is made uniform. be able to. The guide member 360 may be a single member instead of a pair of left and right members.

  The second cutting drum 340 is disposed so as to fill a space between the two first cutting drums 320 when viewed from the front-rear direction of the vehicle body 230. Similar to the first cutting drum 320, the second cutting drum 340 includes a substantially cylindrical cutter drum 342 and a plurality of cutter bits 344 detachably attached to the outer peripheral surface of the cutter drum 342. As shown in FIG. 3, both end portions of the cutter drum 342 in the axial direction are rotatably supported while being sandwiched by a substantially U-shaped bracket 346 that opens downward as viewed from the front-rear direction of the vehicle body 230. ing. Note that the second cutting drum 340 is rotationally driven by a hydraulic motor, an electric motor, or the like not shown in the same manner as the first cutting drum 320.

  The bracket 346 is attached to the four guide rails 348 extending downward from the base member 260 so as to be vertically movable. In addition, the substantially central portions located at the front and rear of the bracket 346 are respectively connected to the base member 260 or a member integrated therewith via a telescopic cylinder 350 that can be expanded and contracted in the vertical direction. Therefore, the position of the second cutting drum 340 with respect to the base member 260 can be changed by expanding and contracting the telescopic cylinder 350.

  The belt conveyor 400 is driven by, for example, a hydraulic motor or an electric motor (not shown), and is disposed between the front wheel 210 of the self-propelled vehicle 200 and the cutting unit 300 so that the conveyance direction extends in the vehicle width direction of the vehicle body 230. Has been. Specifically, the belt conveyor 400 is suspended by two brackets 410 that are integrated with the base member 260 and extend parallel to the front-rear direction of the vehicle body 230. Therefore, the waste material on the road surface cut by the first cutting drum 320 and the second cutting drum 340 of the cutting unit 300 is spun up on the belt conveyor 400 by the rotation, and the belt conveyor 400 causes the waste vehicle 200 to move. It is discharged to the side.

  Here, the belt conveyor 400 can be moved up and down by, for example, a telescopic cylinder (not shown) so that the relative position between the first cutting drum 320 and the second cutting drum 340 of the cutting unit 300 can be changed. It may be. Further, one end portion of the belt conveyor 400 is rotatably connected to a rotation shaft extending in the front-rear direction of the vehicle body 230 so that the inclination angle of the belt conveyor 400 can be arbitrarily changed, while the other end portion is a telescopic cylinder with respect to the base member 260. You may make it connect via.

  In the vicinity of the first cutting drum 320 and the second cutting drum 340, for example, a watering device that sprays water in a mist form may be attached to reduce dust generated due to road surface cutting work. In addition, two first cutting drums 320 arranged in the vehicle width direction of the vehicle body 230 are connected to each other by connection means such as a universal joint and a ball joint, and end portions positioned outside the vehicle width and You may make it the intermediate part of a connection means be supported by an expansion-contraction cylinder. In short, the first cutting drum 320 only needs to be displaceable in the vertical direction with respect to the vehicle body 230 at least one of the two end portions. In this case, the first cutting drum 320 may be tilted into a C shape (inverted V shape) when viewed from the front-rear direction of the self-propelled vehicle 200.

  Next, a procedure of a method for repairing a curved slope such as an automobile test course using the road surface cutting device 100 will be described with reference to FIGS. 5 and 6. Here, the road surface cutting device 100 travels in the direction in which the curved slope 500 extends for every predetermined width along the direction orthogonal to the direction in which the curved slope 500 extends to cut the road surface.

[Procedure 1]
When the work for repairing the curved slope 500 is started, as shown in FIG. 5, the road surface cutting device 100 is disposed at the lower portion of the curved slope 500, and a support cart (roller supporter) is formed on the flat portion formed at the upper portion of the curved slope 500. ) 600 is arranged. And the road surface cutting apparatus 100 and the support trolley | bogie 600 are connected with the wire rope 700, for example. Note that the support cart 600 may be disposed on a flat portion formed below the curved slope 500.

[Procedure 2]
The road surface cutting device 100 and the support carriage 600 are caused to travel and are moved to a position at which cutting of the road surface is started, as shown in FIG. At this time, since the road surface cutting device 100 is connected to the support carriage 600 via the wire rope 700, the road surface cutting device 100 can safely work even if the inclination angle of the curved inclined surface 500 is large.

[Procedure 3]
The telescopic cylinder 240 of the self-propelled vehicle 200 is expanded and contracted to move the vehicle body 230 up and down, and the height of the first cutting drum 320 and the second cutting drum 340 of the cutting unit 300 from the road surface is set to a predetermined height. Then, the telescopic cylinder 330 of the cutting unit 300 is appropriately expanded and contracted, and the first cutting drum 320 is tilted in a V shape following the curved slope 500 as shown in FIG. Further, the telescopic cylinder 350 of the cutting unit 300 is appropriately expanded and contracted, and the second cutting drum 340 is moved up and down so as to follow the curved inclined surface 500. In this state, the two first cutting drums 320 are tilted in a V shape, and the second cutting drum 340 is moved up and down so as to fill the gap between them. Become.

[Procedure 4]
While rotating the first cutting drum 320 and the second cutting drum 340 of the cutting unit 300, the telescopic cylinder 240 of the self-propelled vehicle 200 is contracted, and the first cutting drum 320 and the second cutting drum 340 are moved downward. And move. Then, the existing road surface is cut to a predetermined depth. At this time, since the cutting depth of the road surface can be set by the expansion and contraction of the expansion / contraction cylinder 240, the accuracy can be improved. Further, the waste material on the road surface cut by the first cutting drum 320 and the second cutting drum 340 is spun up on the belt conveyor 400 disposed in front of the first cutting drum 320, and is conveyed by the belt conveyor 400. It is discharged to the side of the self-propelled vehicle 200.

[Procedure 5]
The road surface cutting device 100 and the support carriage 600 are run along the direction in which the curved slope 500 extends, and the road surface is cut into a strip shape with a predetermined width. At this time, since the road surface cutting device 100 is connected to the support carriage 600 via the wire rope 700, the road surface cutting device 100 does not slide down below the curved slope 500 and continuously cuts the road surface with high accuracy. Can do.

[Procedure 6]
When the cutting is completed to the cutting end position on the road surface, the telescopic cylinder 240 of the self-propelled vehicle 200 is extended to move the first cutting drum 320 and the second cutting drum 340 of the cutting unit 300 away from the road surface. Then, the rotational driving of the first cutting drum 320 and the second cutting drum 340 is stopped.

[Procedure 7]
The road surface cutting device 100 and the support carriage 600 are moved to the next cutting start position, and the procedures 3 to 6 are repeated.

[Procedure 8]
When the cutting of the road surface is completed by the road surface cutting device 100, the waste material remaining on the curved slope 500 is collected and cleaned using a slope cleaning vehicle (sweeper) or the like.

[Procedure 9]
After the asphalt emulsion is sprayed on the road surface after the cleaning is completed, the asphalt mixture is spread on the asphalt finisher for slopes. At this time, the asphalt mixture is supplied to the hopper of the asphalt finisher for slopes by, for example, a stacker and a belt conveyor.

[Procedure 10]
The spread and leveled asphalt mixture is compacted by an iron ring roller for slopes and a tire roller for slopes.

  In this way, when the road surface of the curved slope 500 is cut, the first cutting drum 320 is tilted in a V shape and the second cutting drum 340 is lowered to follow the curved slope 500 as a whole. Shape. For this reason, the curved slope 500 can be cut in a shape that follows the cross-sectional shape thereof, and the work of cutting deeper than the design value as in the prior art becomes unnecessary. Accordingly, leveling work for paving the asphalt mixture is unnecessary or less, and the construction period can be prolonged and the cost can be prevented from increasing.

  Further, when the crossing shape of the road surface continuously changes from flat to a three-dimensional curve, the postures of the first cutting drum 320 and the second cutting drum 340 are continuously changed to cope with this. be able to.

  Note that the first cutting drum 320 and the second cutting drum 340 in the cutting unit 300 may be arranged in the order of the second cutting drum 340 and the first cutting drum 320 from the front to the rear of the vehicle 230. . The first cutting drum 320 is not limited to two, and may be three or more. In this case, the number of the second cutting drums 340 is a number obtained by subtracting 1 from the number of the first cutting drums 320 arranged. Furthermore, when there are many arrangement | positioning numbers of the 1st cutting drum 320 and the 2nd cutting drum 340, it is good also as a structure which moves both up and down.

  The road surface cutting device 100 includes a control device with a built-in computer, and the expansion cylinder 330 of the first cutting drum 320 and the expansion cylinder 350 of the second cutting drum 340 according to cutting depth data input in advance. May be controlled. In this case, the road surface cutting device 100 may measure the current position by, for example, GPS (Global Positioning System), and control the telescopic cylinders 330 and 350 in accordance with data associated with the current position. In this way, the road surface cutting device 100 can cope with the case where the cross-sectional shape of the road surface is continuously changed from flat to a three-dimensional curve. The control device of the road surface cutting device 100 may further control the telescopic cylinder 240 that moves the front wheel 210 and the rear wheel 240 up and down according to the data of the cutting depth.

DESCRIPTION OF SYMBOLS 100 Road surface cutting device 200 Self-propelled vehicle 230 Car body 240 Telescopic cylinder 300 Cutting unit 320 1st cutting drum 340 2nd cutting drum 360 Guide member 362 Movable member 366 Connecting member 500 Curved slope

Claims (6)

A plurality of first cutting drums disposed at a predetermined interval in the vehicle width direction on the bottom surface of the vehicle body of the self-propelled vehicle, and the adjacent first cutting drums as viewed from the front-rear direction of the self-propelled vehicle. A road surface cutting device equipped with at least one second cutting drum arranged in the vehicle width direction so as to fill a gap,
Each of the first cutting drum and the second cutting drum can be displaced in the vertical direction at least one of the both ends with respect to the body of the self-propelled vehicle.
A road surface cutting device characterized by that. Two first cutting drums are arranged in the vehicle width direction,
One of the second cutting drums is disposed in the vehicle width direction,
The road surface cutting device according to claim 1. The first cutting drum is tilted into a V shape or a C shape when viewed from the front-rear direction of the self-propelled vehicle,
The second cutting drum is movable up and down with respect to the vehicle body of the self-propelled vehicle.
The road surface cutting apparatus according to claim 2. A guide member extending in the vertical direction of the body of the self-propelled vehicle;
A movable member attached to the guide member so as to be movable up and down;
Two connecting members having one end portion rotatably connected to the movable member and the other end portions rotatably connected to the two first cutting drums,
The road surface cutting device according to claim 3, further comprising: The front wheels and rear wheels of the self-propelled vehicle are attached to the vehicle body via telescopic cylinders,
The road surface cutting device according to any one of claims 1 to 4, characterized in that: A cutting method of a curved slope using the road surface cutting device according to any one of claims 1 to 5,
At least one end portion of both end portions of the first cutting drum and the second cutting drum is displaced in the vertical direction so as to follow the curved slope, and the road surface cutting is performed in a direction in which the curved slope extends. Run the device to cut the road surface,
A cutting method for curved slopes.