JPH0243404A - Cutting device and method for road paving - Google Patents

Abstract

PURPOSE:To make it possible to cut a road paving body in a curved surface shape to a fixed thickness by providing on a self running vehicle a supporting device free to swing on the surface orthogonal to the vehicle running direction and providing a rotary cutting device free to swing within the surface in parallel to the running direction. CONSTITUTION:On a vehicle main body 1 having a crawler 2, an arm 5 is provided free to swing within a perpendicular surface in parallel with the vehicle running direction, and on a main frame attached to it, the first hanging member 11 is provided free to swing within the perpendicular surface orthogonal to the vehicle running direction. And on the first hanging member 11, a rotary cutting device 22 is provided free to swing within the surface in parallel with the surface orthogonal to the vehicle running direction. Consequently, it is possible to cut a road paving body with a curved surface such as a vehicle test course, bicycle racing tack, river band, etc. to a fixed thickness.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cutting device for pavement such as asphalt pavement, and particularly for cutting slopes of automobile test courses, cycling stadiums, river embankments, etc. The present invention relates to a cutting device and a cutting method useful for.

<Prior Art> For example, when repairing an asphalt pavement laid on a driving road of an automobile test course, conventionally, all the asphalt pavement is removed and asphalt pavement is performed on the rear part.

<Problem to be solved by the invention> However, after removing all the asphalt pavement,
Conventional methods of constructing new asphalt pavement had problems such as poor repair efficiency and high repair costs.

In addition, there is a conventional cutting device that cuts asphalt pavement to a constant thickness and flat shape, but it is said that this device cannot cut curved surfaces such as car tracks to a constant thickness. There was a problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cutting device and a cutting method capable of cutting even a curved pavement to a substantially constant thickness.

<Means for Solving the Problems> Therefore, in the present invention, in claim 1, the cutting part that cuts the pavement and is disposed so that the axis of rotation is substantially perpendicular to the direction in which the vehicle travels. A plurality of supporting members are arranged so that parts of the cutting parts adjacent to each other orthogonally to each other are projected substantially overlappingly, and supporting members that support each of the cutting parts are arranged in a plane that is substantially orthogonal to the vehicle traveling direction. a lifting device that is connected to each other so as to be freely swingable and that lifts and lowers the connecting portion of the support member so that the support member swings within the plane; The vehicle is equipped with a swinging device that swings in a substantially vertical plane formed in a vertical plane, and a rotating device that rotates each of the cutting portions as the rotation axis.

Moreover, in claim 2, using the cutting part of claim 1,
The connecting portion of the supporting member is raised and lowered so that each of the cutting portions comes into contact with the surface of the pavement, and each cutting portion is swung in a plane substantially perpendicular to the vehicle traveling direction, and each cutting portion is The vehicle is moved forward while being rotated about a rotating shaft disposed in a substantially vertical direction while being swung in a substantially vertical plane formed in the traveling direction and tilted with respect to the surface of the pavement. I tried cutting it.

In claim 1, by swinging the support member, the cutting portion is swung in a plane substantially perpendicular to the vehicle traveling direction, and in a substantially perpendicular plane formed in the vehicle traveling direction. It is made to swing so that it can cut both flat and curved surfaces.

Further, in claim 2, the cutting part is swung within the plane by swinging the support member, and the cutting part is swung within the vertical plane so as to be inclined with respect to the pavement surface. So, I decided to move the vehicle forward and cut the pavement.

<Examples> Examples corresponding to claims 1 and 2 of the present invention will be described below based on FIGS. 1 to 13.

In FIG. 1, crawlers 2 are attached to both sides of a vehicle body 1, and an engine 3 is mounted at the front of the vehicle body 1, which serves as a driving source for various devices.

Further, a driver's seat 4 is provided at the rear of the vehicle body 1.

The front end portions of swinging arms 5 are attached to both sides of the vehicle body l so as to be able to swing freely within a substantially vertical plane formed in the traveling direction (front and rear direction) of the vehicle, and the middle portions of these swinging arms 5 A piston rod of a hydraulic cylinder 6 attached to the vehicle body 1 is attached to be able to swing freely. By operating the hydraulic cylinder 6, the swing arm 5 is caused to swing within the vertical plane.

A front portion of a rectangular main frame 7 is attached to an intermediate portion of the swing arm 5 so as to be able to swing freely within a substantially vertical plane formed in the direction of vehicle travel. A height adjustment device 8 consisting of a screw mechanism is attached to the rear end portion of the swing arm 5, and a lower end portion of the height adjustment device 8 is attached to the rear portion of the main frame 7 so as to be freely swingable.

A plurality of support brackets 9 are attached to the front and rear ends of the main frame 7 at predetermined intervals in the vehicle width direction. Does each support bracket 9 have lifting equipment? Z10 are each mounted so as to be able to swing freely in a substantially vertical plane substantially perpendicular to the vehicle traveling direction. Each lifting device 10 includes a hydraulic motor 10a,
A reduction gear 10b and a rod member 10c which is driven by a hydraulic motor 10a and moves up and down in the vertical direction in FIG. 2 are provided.

A first hanging member 11 is provided at one corner of the main frame 7.
The upper end portion is attached to be able to swing freely within a substantially vertical plane substantially perpendicular to the vehicle traveling direction. Further, the upper end portion of the second hanging member 12 is fixed to the other side corner portion of the main frame 7.

Further, below the main frame 7, as shown in FIG. 4, first swing frames 13 serving as rectangular support members are arranged in parallel in the vehicle width direction. The left side of the first swinging frame 13, which is the leftmost part in FIG. 4, is attached to the lower end of the first hanging member 11 so as to be able to swing freely in a substantially vertical plane perpendicular to the vehicle traveling direction. Further, the right side of the first swing frame 13 on the leftmost side in FIG. 4 is attached to the lower end of the second hanging member 12 so as to be able to swing freely within the vertical plane. As shown in FIG.
The rod member 10c is attached to the lower end portion of the rod member 10c so as to be able to swing freely in a substantially vertical plane substantially perpendicular to the vehicle traveling direction.

Also, the side portion of the first swing frame 13 adjacent to the first swing frame 13 is also connected to the first swing frame 13. It is attached to the lower end of the rod member 10c of the same lifting device 10 as the swinging member 13 so as to be able to swing freely within the vertical plane. Therefore, the lower end portion of the rod member 10c constitutes a connecting portion.

An intermediate portion of a plate-shaped second swing frame 14 is attached to each of the first swing frames 13 via a first bearing 15 so as to be able to swing freely within a substantially vertical plane formed in the vehicle traveling direction. ing. As shown in FIG. 5, a swing rod 16 made of a male screw member is attached to the end of each second swing frame 14 by a lock nut 17. On the other hand, each of the first
As shown in FIG. 5, second bearings 18 are respectively attached to the swing frame 13, and a fork end 19 is attached to the second bearings 18 via a shaft 20 on a substantially vertical surface formed in the vehicle traveling direction. Each is attached so that it can swing freely inside. Then, the swing rod 16 is attached to the fork end 19.
are screwed together, and by manually rotating the swinging rod 16, the second swing frame 14 swings about the first bearing 15 in a vertical plane formed in the vehicle traveling direction. It has become. Note that the swinging iron 16 may be rotated by an electric motor, a hydraulic motor, or the like. Therefore, the second swing frame 14 and the swing rod 16 constitute a swing device.

A hydraulic motor 21 serving as a rotating device is attached to the second swing frame 14 with its output shaft 21a disposed substantially vertically. A conical cutting part 22 for cutting the asphalt pavement is detachably attached to the lower end of the output shaft 21a by bolts, tapers, etc., respectively. Here, the cutting parts 22 are arranged in a staggered manner as shown in FIGS. 3 and 4.

Further, each cutting portion 22 is arranged such that a portion of adjacent cutting portions 22 are projected overlappingly on a plane substantially orthogonal to the vehicle traveling direction.
It is arranged. As shown in FIGS. 6 and 7, the cutting portion 22 has a truncated conical top surface 22a and a truncated conical bottom surface 22b.
A perpendicular line 22c connecting the two is disposed substantially vertically, and a truncated conical top surface 22a is disposed substantially horizontally at the lowest point.

A plurality of holders 23 are attached in three spiral shapes at a predetermined pitch to the truncated conical top surface 22a and outer circumference 22d of the cutting portion 22, and bits 24 made of a cemented carbide member are attached to each of these holders 23. It is being

Note that 25 is a holding frame that is attached to the main frame 7 and restricts movement of the second swing frame 14 in the longitudinal direction of the vehicle.

Next, the action will be explained.

First, an example in which the surface of the asphalt pavement is formed substantially flat will be described.

By operating the hydraulic cylinder 6, the swinging arm 5 is swung approximately vertically in the direction of vehicle movement, and the main frame 7 is rotated.
At the same time, the cutting section 22 is moved downward. At this time, the main frame 7 is swung about the front end by the height adjustment device 8 to position the main frame 7 in a substantially horizontal state. Further, by raising and lowering the rod member 10c of each lifting device 1O, each first swing frame 13 is positioned in a substantially horizontal state as shown in FIG. Furthermore, each swinging rod 16
to swing each second swing frame 14 and cut each cutting part 22.
is placed in a substantially horizontal position as shown in FIG.

Then, each hydraulic motor 21 rotates each cutting section 22 about its perpendicular line 22c. At this time, the direction of rotation of the cutting part 22 is as shown in FIGS. 8 and 9.
Set it so that every other one is in the opposite direction. In this way, the cutting force during cutting is balanced throughout the cutting portion 22, and the asphalt pavement can be stably cut. Note that the rotation directions of the left and right cutting parts 22 may be reversed with respect to the central cutting part 22.

Then, the swinging arm 5 is swung to move each cutting part 22 to the eighth position.
Lower the asphalt pavement while cutting it to the position shown in the figure. Then, the asphalt pavement is cut while moving the vehicle forward. In this way, the cut surface of the asphalt pavement can be made substantially flat over a wide range.

Further, since the cut surfaces of both sides that remain after cutting are inclined upward, and the bits 24 are arranged at a predetermined pitch, the cut surfaces are formed in an uneven shape in the vertical direction. . As a result, the area of the cut surface is significantly increased compared to the conventional one, so the contact area between the new asphalt mixture and the old asphalt mixture is significantly increased, and the adhesion between them can be significantly improved. In addition, since the cut surface faces upward, the new asphalt mixture is placed on top of the old asphalt mixture, which significantly increases the structural strength of the new asphalt mixture at the cut point against external forces from above. You can improve.

Next, an explanation will be given taking as an example a case where a running track of an automobile test course or a velodrome is cut.

As shown in FIG. 10, the cutting device A according to the present invention is
The tractor B is installed on an inclined running road, while the tractor B is arranged on a flat part below the running road. A support member C attached to the edge of the tractor is connected to the cutting device A, and the support member C and the tractor B support the cutting device A so that it does not slip down. The length of the support/holding member C is variable by a hydraulic cylinder D. Note that the cutting device A may be supported at the top E by a tractor or the like.

Then, the cutting device A and the tractor B are run in parallel, and the asphalt pavement on the traveling path is cut by a predetermined thickness by the cutting device iA.

Specifically, as shown in FIG. 11, when the running path is composed of a flat straight part F and a curved part G connected to this straight part F, in the straight part F, As described above, the cutting portion 22 is arranged approximately parallel to the surface of the asphalt pavement as shown in FIG.

Then, while the cutting device A is traveling along the straight line portion F, the cutting section 22 cuts the asphalt pavement by a certain thickness.

Then, when moving from the straight section F to the curved section G, each lifting device 10 is operated to move the rond members 10c downward. Accordingly, each first swinging frame 13 moves the rod member 1 in a substantially vertical plane perpendicular to the vehicle traveling direction.
It moves downward while being swung by a predetermined amount around the lower end of 0c. As a result, the cutting portion 22 is positioned so as to substantially follow the surface of the asphalt pavement of the curved portion G, as shown in solid pure water in FIG.

Furthermore, by rotating each swinging rod 16,
Each second seeding frame 14 is swung around the bearing 15, and each cutting portion 22 is swung within a substantially vertical plane formed in the vehicle traveling direction. Thereby, each cutting part 22
As shown in Figure 3, the truncated conical top surface 22a is positioned so as to face the construction direction by a predetermined amount, as shown in the case of chain pure water.

In this state, the cutting device A is moved along the curved portion G and the cutting portion 22 cuts the asphalt pavement by a certain thickness.

In this way, the cutting portion 22 is placed in the first position in the vehicle width direction.
As shown in Fig. 2, since the asphalt pavement is swung and positioned along the curved surface of the asphalt pavement, even if the curved part G is curved so that the central part is depressed, the asphalt pavement can be made to correspond to the curved shape. It can be cut to a substantially constant thickness. In particular, since each cutting part 22 is made to swing within a substantially vertical plane formed in the vehicle traveling direction, each cutting part 22
As a result, the asphalt pavement is cut as shown in the dot-chain pure water in Figure 12, so that the asphalt pavement can be cut to a substantially constant thickness corresponding to the curved shape of the curved portion G.

Moreover, since each cutting part 22 is made to swing in a substantially vertical plane perpendicular to the vehicle traveling direction, the asphalt pavement can be continuously cut from the flat straight part F to the curved part G.

Note that the cutting device A may cut the asphalt pavement by traveling in the direction of the top E and the lower part of the running path.

Furthermore, a plurality of cylindrical cutting parts may be provided with their cylindrical axes oriented in the vertical direction.

<Effects of the Invention> As explained above, the present invention has the following features in claim 1:
A plurality of cutting parts are arranged so that parts of adjacent cutting parts overlap in a plane substantially perpendicular to the direction of vehicle travel, and a support member that supports the cutting parts is swung in a plane substantially perpendicular to the direction of travel of the vehicle. Since the present invention provides a cutting device in which the cutting portion is oscillated within a substantially vertical plane formed in the direction of vehicle travel, the pavement can be cut to a constant thickness on both flat and curved portions.

In addition, in claim 2, the cutting portion of claim 1 is swung in a plane orthogonal to the vehicle traveling direction, and is swung and tilted in a substantially vertical plane formed in the vehicle traveling direction. Since the pavement is cut, the pavement can be cut to a constant thickness even if the surface of the pavement is curved.

[Brief explanation of the drawing]

Fig. 1 is a side view of a cutting device showing an embodiment of the present invention;
The figure is a view taken from the ■-■ arrow of Fig. 1, Fig. 3 is a view taken from the ■-■ arrow of Fig. 2, Fig. 4 is a view taken from the IV-IV arrow of Fig. 2, and Fig. 5 is a view taken from the Fig. 1. Figure 6 is an enlarged view of the main parts of Figure 1.
FIG. 7 is a bottom view of FIG. 6, and FIGS. 8 to 13 are views for explaining the same operation. 10... Lifting device 13... First frame 1
4...Second swing frame 21...Hydraulic motor
22...Cutting part

Claims (2)

[Claims] (1) A part of the cutting part arranged so that the axis of rotation is substantially perpendicular to the pavement and cutting the pavement is projected so that a part of the adjacent cutting part almost overlaps with a plane that is substantially orthogonal to the direction of vehicle travel. A plurality of supporting members are provided, and supporting members supporting each of the cutting portions are connected to each other so as to be swingable in a plane substantially orthogonal to the vehicle traveling direction, and the connecting portion of the supporting members is connected to the supporting member. a lifting device that raises and lowers the member so as to swing within the plane; a rocking device that is attached to each of the support members and swings the cutting portion in a substantially vertical plane formed as the vehicle travels; A pavement cutting device characterized in that a vehicle is equipped with a rotating device that rotates the cutting portion as the rotating shaft. (2) A part of the cutting part arranged so that the axis of rotation is substantially perpendicular to the pavement and cutting the pavement is projected so that a part of the adjacent cutting part almost overlaps with a plane that is substantially perpendicular to the direction of vehicle travel. A plurality of supporting members are arranged so as to support each of the cutting parts, and the supporting members supporting each of the cutting parts are connected to each other so as to be able to swing freely in a plane substantially perpendicular to the direction of vehicle travel, so that each of the cutting parts comes into contact with the surface of the pavement. The connecting portions of the support member are moved up and down so as to touch each other, and each cutting portion is swung in a plane substantially perpendicular to the vehicle traveling direction, and each cutting portion is arranged in a substantially vertical plane formed in the vehicle traveling direction. A method for cutting a pavement body, the method comprising cutting the pavement body by moving a vehicle while rotating the respective cutting parts as the rotating shafts while rotating the vehicle in a state in which the pavement body is tilted with respect to the surface of the pavement body by being oscillated within the pavement body. .