JP6542026B2 - Road surface cutting device and cutting method of curved slope - Google Patents

Description

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

  When repairing a curved slope (bank) such as an automobile test course, a road surface cutting apparatus such as that described in JP-A-11-148107 (Patent Document 1) is used to specify a road surface such as asphalt pavement. A method was used in which depth cutting was performed and asphalt mixture and the like were paved on the top.

Japanese Patent Application 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, it can not cut the road surface with a shape following a curved slope, and must cut the road surface deeper than the design value. I had to. When the road surface is cut deeply, leveling work of paving asphalt mixture and the like has become essential, which has been a factor in prolonging the construction period and increasing costs.

  Then, an object of this invention is to provide the road surface cutting device 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 mounts a cutting drum whose rotation axis extends in the vehicle width direction on the bottom of the vehicle body of the mobile vehicle. The cutting drum has a bifurcated shape in which both end portions can be relatively displaced in the vertical direction with respect to the central portion in the axial direction, and the divided portion has an uneven shape that can be fitted at a predetermined interval. ing. Further, the cutting drum divided into two parts has a cutter bit of one cutting drum and the other cutting drum in a predetermined axial range including the division location in a state where both end parts are vertically displaced from the central part in the vertical direction. And the cutter bit of.

  In the cutting method of curved slope using a road surface cutting device, at least one of the both ends of the cutting drum is relatively displaced in the vertical direction to conform to the curved slope, and the road surface cutting device extends in the direction in which the curved slope extends. Run and cut the road surface.

  According to the present invention, it is possible to cut the road surface in a shape following a curved slope.

It is a top view which shows an example of a road surface cutting device. It is a side view showing an example of a road surface cutting device. It is the elements on larger scale which show an example of a 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 locus | trajectory of the cutter bit of a cutting drum. It is explanatory drawing of the state which starts the cutting operation of a curved slope. It is an explanatory view of a state where cutting operation of a curved slope is performed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.
1 and 2 show an example of the road surface cutting apparatus 100. FIG.

  The road surface cutting apparatus 100 has a self-propelled vehicle 200, a cutting unit 300 mounted on the bottom of the vehicle body of the self-propelled vehicle 200, and a screw conveyor 400 for discharging waste material of the road surface cut by the cutting unit 300.

  The 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 an extension cylinder 240 which can extend and contract in the vertical direction of the vehicle body 230. Here, as the extension cylinder 240, for example, a hydraulic cylinder using a 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 the hydraulic oil to the extension cylinder 240, the vertical positions of the front wheel 210 and the rear wheel 220 with respect to the vehicle body 230 can be changed, and the ground height of the mobile vehicle 200 can be arbitrarily changed. .

  Further, a pair of guide rails 250 extending parallel to the vehicle width direction is attached to the bottom of the vehicle body 230, specifically, the bottom located between the pair of left and right front wheels 210 and the rear wheels 220. Between the pair of guide rails 250, as a member for suspending and supporting the cutting unit 300, for example, a base member 260 having a substantially rectangular parallelepiped shape whose lower surface is opened is slidably attached. Then, the base member 260 slides in the vehicle width direction along the guide rail 250, for example, by a telescopic cylinder (not shown) that can expand and contract in the vehicle width direction. The base member 260 is not limited to the substantially rectangular parallelepiped shape whose lower surface is open, but can be, for example, an arbitrary shape such as a substantially rectangular shape in a plan view, which can ensure a required strength.

  On the lower surface of the base member 260, as shown in FIGS. 2 and 3, a substantially trapezoidal shape whose width gradually decreases toward the tip end portion is positioned so that the plate surface is positioned on a surface perpendicular to the longitudinal direction of the vehicle body 230. A pair of support members 270 are attached at a predetermined distance. Here, the support member 270 may be positioned substantially at the center in the vehicle width direction of the base member 260 and may be integrated with the base member 260.

  The cutting unit 300 has a cutting drum 320 whose rotation axis extends in the vehicle width direction of the vehicle body 230. The cutting drum 320 has a bifurcated shape in which both end portions can be displaced relative to each other in the vertical direction with respect to the central portion in the axial direction, and an uneven shape in which divided portions of the cutting drum 320 can be fitted with each other at a predetermined interval There is no. Here, the predetermined interval is an interval at which the two divided cutting drums 320 do not interfere with each other even if the both ends are vertically displaced in the vertical direction with respect to the center in the axial direction (hereinafter referred to as “maximum displacement state”). can do. Moreover, the dimension (length) of the axial direction of the concavo-convex shape of the cutting drum 320 is determined so that the tip of the cutter bit of each of the two divided cutting drums 320 does not separate in the maximum displacement state. Accordingly, in the maximum displacement state, the cutter bit of one cutting drum 320 and the cutter bit of the other cutting drum 320 overlap in a predetermined range in the axial direction including the dividing portion in the maximum displacement state. There is.

Hereinafter, the description of the details of the cutting unit 300 will be continued.
The cutting drum 320 has a pair of split drums 340 arranged in series along the vehicle width direction of the vehicle body 230, and a joint 360 connecting the opposing ends of the pair of split drums 340.

  The pair of split drums 340 includes a substantially cylindrical cutter drum 342 and a plurality of cutter bits 344 removably attached to the outer peripheral surface of the cutter drum 342. In the pair of split drums 340, the mutually opposing end portions of the cutter drums 342 are formed in a concavo-convex shape 342A which can be fitted to each other at a predetermined interval. In the illustrated example, the end of the cutter drum 342 is formed in a rectangular wave (square wave) shape having two cycles, that is, a shape having two convex portions and two concave portions. The convex portion and the concave portion of one cutter drum 342 are fitted to the concave portion and the convex portion of the other cutter drum 342 at a predetermined interval. The uneven shape 342A of the cutter drum 342 is not limited to the rectangular wave shape as illustrated, but may be a known shape such as a triangular wave shape, a sawtooth wave shape, or a sine wave shape. The uneven shape 342A of the cutter drum 342 is not limited to two cycles, but may be three cycles or more. Here, “rectangular wave”, “triangular wave”, “sawtooth wave” and “sine wave” are not limited to accurate waveforms, but may be such that they can be visually recognized.

  The joint 360 consists of two universal joints connected in series so as to allow the pair of split drums 340 to be at least V-shaped tiltable while synchronizing the rotation of the pair of split drums 340. Therefore, the pair of split drums 340 can be tilted in a V shape around the rotation axis extending in the front-rear direction of the vehicle body 230, with the two coupling portions of the universal joint at the joint 360 as the rotation center. Here, by shortening the length of the member located at the center of the universal joint, the rotation centers of the divided drums 340 can be made closer.

  Then, both end portions of the pair of split drums 340 located outward in the vehicle width are attached to a pair of left and right brackets 370 fixed to the support member 270. Here, the pair of left and right brackets 370 can swing around two rotation shafts 380 extending in the front-rear direction of the vehicle body 230.

  That is, the pair of left and right brackets 370 has a substantially rectangular parallelepiped shape in which the lower surface and the side surface located inward in the vehicle width are open and can be tilted to the V shape in side view, the end located inward in the vehicle width As the upper part of the goes upward, it becomes an inclined part which spreads out of the vehicle width. Lower ends of the end portions of the pair of left and right brackets 370 positioned inward of the vehicle width are tip portions (lower end portions) of the support member 270 so as to be able to swing around the two rotation shafts 380 extending in the front and rear direction of the vehicle body 230. Attached to). Therefore, the pair of left and right brackets 370 can be tilted in a V shape around the two rotation shafts 380. Here, the "V-shape" is not limited to a complete V-shape, but may be a degree that can be recognized as a V-shape on the appearance (the same applies hereinafter).

  In addition, a motor MTR such as a hydraulic motor or an electric motor, which is rotationally driven while supporting both end portions of the pair of split drums 340, is fixed to portions of the pair of left and right brackets 370 located outward of the vehicle width. Therefore, each divided drum 340 is supported by the bracket 370 in a cantilever state via the motor MTR.

  Here, it is desirable that the two rotation axes 380 be concentric with the two coupling portions of the universal joint at the joint 360. In this way, since the split drum 340 and the bracket 370 are integrally oscillated, the pair of split drums 340 can be smoothly tilted.

  The front end portions of a pair of extension cylinders 390 are rotatably fixed to the outer side surfaces of the pair of left and right brackets 370 outside the vehicle width around a rotation axis extending in the front-rear direction of the vehicle body 230. An intermediate portion of the pair of telescopic cylinders 390 is pivotally fixed to the base member 260. Therefore, when the extension cylinder 390 is retracted, as shown in FIG. 4, the pair of brackets 370 is tilted in a V-shape, and the pair of divided drums 340 fixed in a cantilever state is also tilted in a V-shape.

  When the pair of split drums 340 has a simple cylindrical shape, the tip of the cutter bit 344 of each cutter drum 342 is separated at the lower surface when the pair of split drums 340 is tilted in the V shape, and a portion where the road surface can not be cut Can be However, since the concavo-convex shape 342A of each cutter drum 342 is fitted at a predetermined interval and the cutter bit 344 is attached thereto, one cutter drum 342 is provided at the axial center portion of the pair of split drums 340. The cuttable range of the cutter bit 344 of the second embodiment overlaps the cuttable range of the cutter bit 344 of the other cutter drum 342. For this reason, even if the pair of divided drums 340 is tilted in a V-shape, as shown in FIG. 5, the tip of the cutter bit 344 of each cutter drum 342 does not separate on the lower surface, and a portion where the road surface can not be cut occurs. Can avoid doing so.

  The screw conveyor 400 is driven by a motor 410 such as a hydraulic motor or an electric motor, and is disposed between the front wheel 210 of the mobile vehicle 200 and the cutting unit 300 so that the conveying direction extends in the vehicle width direction of the vehicle body 230. ing. A waste material receptacle 420 is attached between the cutting drum 320 of the cutting unit 300 and the screw conveyor 400 to feed the waste material of the road surface cut by the cutting drum 320 to the screw conveyor 400. Therefore, the waste material cut by the cutting drum 320 is delivered to the screw conveyor 400 while being received by the waste material receiver 420, and conveyed and discharged outward in the vehicle width by the operation of the screw conveyor 400.

  Here, the screw conveyor 400 may be vertically movable by, for example, a telescopic cylinder (not shown) so that the relative position of the cutting unit 300 with the cutting drum 320 can be changed. Further, one end portion of the screw conveyor 400 is rotatably coupled to a rotation axis extending in the front-rear direction of the vehicle body 230 so that the inclination angle of the screw conveyor 400 can be arbitrarily changed, while the other end portion is an extension cylinder relative to the base member 260 May be linked via

  For example, a water sprinkler that sprays water in the form of a mist may be attached in the vicinity of the cutting drum 320 to reduce dust generated as a result of the cutting operation of the road surface. Further, the pair of split drums 340 in the cutting drum 320 may be tilted in a V-shape (inverted V-shape) when viewed from the front-rear direction of the mobile vehicle 200 by extending the extension cylinder 390. In this way, not only the concave curved slope but also the convex curved slope can be cut. Here, the “C-shaped” is not limited to the completely C-shaped, but may be an extent that it can be recognized as a C-shaped in appearance.

  Next, a procedure of a method of repairing a curved slope such as a car test course using the road surface cutting device 100 will be described with reference to FIGS. 6 and 7. Here, the road surface cutting device 100 travels in the direction in which the curved slope 500 extends and cuts the road surface for each predetermined width along the direction orthogonal to the direction in which the curved slope 500 extends.

[Step 1]
When starting work to repair the curved slope 500, as shown in FIG. 6, the road surface cutting device 100 is disposed below the curved slope 500, and a flat plate 510 formed at the upper portion of the curved slope 500 Place a supporter) 600. Then, the road surface cutting device 100 and the support carriage 600 are connected by a wire rope 700, for example. The support carriage 600 may be disposed on a flat portion formed in the lower part of the curved slope 500.

[Step 2]
The road surface cutting device 100 and the support carriage 600 are made to travel and moved to a position where 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 work can be performed safely even if the inclination angle of the curved slope 500 is large.

[Step 3]
The extension cylinder 240 of the mobile vehicle 200 is extended and retracted to move the vehicle body 230 up and down, and the height of the cutting drum 320 of the cutting unit 300 from the road surface is set to a predetermined height. Then, the extension cylinder 390 of the cutting unit 300 is appropriately extended and contracted, and as shown in FIG. 4, the cutting drum 320 is tilted in a V-shape following the curved slope 500.

[Step 4]
While rotationally driving the cutting drum 320 of the cutting unit 300, the telescopic cylinder 240 of the mobile vehicle 200 is contracted to move the cutting drum 320 downward. Then, the existing road surface is cut to a predetermined depth. At this time, the cutting depth of the road surface can be set by the expansion and contraction of the extension cylinder 240, so that the accuracy can be improved. In addition, waste material of the road surface cut by the cutting drum 320 is flipped up on the screw conveyor 400 disposed in front of the cutting drum 320 and discharged to the side of the mobile vehicle 200 by the screw conveyor 400.

[Step 5]
The road surface cutting device 100 and the support carriage 600 are made to travel along the direction in which the curved slope 500 extends, and the road surface is cut in a band 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 continuously cuts the road surface with high accuracy without falling downward toward the curved slope 500. Can.

[Step 6]
When the cutting is completed to the cutting end position of the road surface, the extension cylinder 240 of the mobile vehicle 200 is extended to move the cutting drum 320 of the cutting unit 300 away from the road surface. Then, the rotational drive of the cutting drum 320 is stopped.

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

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

[Step 9]
After spraying the asphalt emulsion on the road surface after cleaning is completed, the asphalt mixture is spread with a slope asphalt finisher. At this time, the asphalt mixture is supplied, for example, by the stacker and the belt conveyer to the hopper of the slope asphalt finisher.

[Step 10]
The spread asphalt mixture is compacted by means of a bevel iron wheel roller and a bevel tire roller.

  In this way, when the road surface of the curved slope 500 is cut, the cutting drum 320 is tilted in a V-shape and has a shape following the curved slope 500. Therefore, the curved slope 500 can be cut in a shape that conforms to the cross-sectional shape, and the operation of cutting deeper than the design value as in the prior art is unnecessary. Therefore, the leveling operation for paving asphalt mixture becomes unnecessary or less, and it is possible to suppress the prolongation of construction period and cost increase.

  Further, when the cross-sectional shape of the road surface changes continuously from flat to a three-dimensional curve, this can be made to correspond by changing the posture of the cutting drum 320 continuously.

  The road surface cutting device 100 may be provided with a control device incorporating a computer, and may control the telescopic cylinder 390 of the cutting drum 320 according to the data of the cutting depth input in advance. In this case, the road surface cutting device 100 may measure the current position using, for example, a GPS (Global Positioning System), and control the telescopic cylinder 390 according to 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 cutting surface of the road surface changes continuously from flat to a three-dimensional curve. Note that 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 220 up and down according to the data of the cutting depth.

DESCRIPTION OF SYMBOLS 100 Road surface cutting device 200 Self-propelled vehicle 230 Body 240 Stretch cylinder 300 Cutting unit 320 Cutting drum 340 Split drum 342 Cutter drum 342A Uneven shape 344 Cutter bit 360 Joint 390 Stretch cylinder 500 Curved slope

Claims (5)

A road surface cutting apparatus in which a cutting drum whose rotational axis extends in the vehicle width direction is mounted on the bottom of a vehicle body of a mobile vehicle,
The cutting drum has a bifurcated shape in which both end portions can be relatively displaced in the vertical direction with respect to the central portion in the axial direction, and the divided portions of the cutting drum can be engaged with each other at predetermined intervals. to such,
The cutter drum of one of the cutting drums in a predetermined axial range including the dividing portion in a state where the both end portions are vertically displaced from the central portion in the vertical direction with the cutting drum divided into two The cutter bit of the other said cutting drum is overlapping,
Road surface cutting device characterized by The division points of the cutting drum are connected via two universal joints connected in series,
The road surface cutting device according to claim 1 , characterized in that: The cutting drum is tilted in a V-shape or a V-shape when viewed from the front-rear direction of the mobile vehicle.
The road surface cutting device according to claim 1 or 2 characterized by things. The front wheels and the 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 3 , characterized in that: A method of cutting a curved slope using the road surface cutting device according to any one of claims 1 to 4 ,
At least one of the end portions of the cutting drum is relatively displaced in the vertical direction to conform to the curved slope, and the road surface cutting device travels in a direction in which the curved slope extends to cut the road surface.
Cutting method of curved slope characterized by