JPH0243402A - Cutting device and method for road paving body - Google Patents

Abstract

PURPOSE:To make it possible to cut asphalt pavement, etc., having a curved surface such as a vehicle test course to a specific thickness by providing, in a self running vehicle, a rotary cutting device free to swing within the surface orthogonal to the vehicle running direction. CONSTITUTION:On a supporting bracket 9 provided on the rear part of a self running vehicle, a lifting device 10 is provided so as to be swingable within the surface orthogonal to the vehicle running direction. And, on the lower edge of the lifting device 10, a cutting part 22 is provided in a zigzag shape so that a part of the cutting part 22 adjacent to a surface orthogonal to the vehicle running direction is projected in overlapping state.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cutting device for pavement such as asphalt pavement, and is particularly suitable for cutting the surfaces of automobile test courses, bicycle racetracks, river embankments, etc. The present invention relates to a useful cutting device and cutting method.

<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 then a new asphalt pavement is applied.

<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 Problem> For this reason, in the present invention, in claim 1, the cutting part for cutting the pavement body is such that a part of the cutting part adjacent to a plane substantially orthogonal to the vehicle traveling direction is As if projected almost overlappingly,
A rocking device that is arranged in plurality and that swings each cutting portion in a plane substantially orthogonal to the vehicle traveling direction, and a rotating device that rotates each of the cutting portions about a rotation axis are installed in a vehicle. ,
I tried to prepare.

In addition, in the claim, the cutting parts of claim 1 are used, each cutting part is swung in a plane substantially perpendicular to the direction of vehicle travel so as to come into contact with the pavement, and the cutting parts are swung about the rotation axis. While rotating, the vehicle was advanced by the cutting section to cut the pavement.

In the first aspect, each cutting portion is swung in a plane substantially perpendicular to the vehicle traveling direction, so that it is possible to cut a flat portion and a curved surface portion. Further, in the second aspect of the present invention, the cutting portion is oscillated within each of the planes so that the curved surface portion can be cut.

<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 I, and an engine 3 that serves as a drive source for various devices is mounted at the front of the vehicle body 1.

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

Front end portions of swinging arms 5 are attached to both sides of the vehicle body I, respectively, 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. A piston rod of a hydraulic cylinder 6 attached to the vehicle main 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. A lift bag W10 is attached to each support bracket 9 so as to be able to swing freely in a substantially vertical plane substantially orthogonal to the direction of vehicle travel. Each lifting device 10 is provided with a hydraulic motor 10a, a speed reducer 10b, and a rod member 10c that is driven by the hydraulic motor 10a and moves up and down in the vertical direction in FIG.

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, rectangular first swing frames 13 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. The first and second hanging members 11
．． As shown in FIG.
It is attached to the lower end of the 0C so that it can swing freely in a substantially vertical plane that is substantially orthogonal to the vehicle traveling direction. Further, the side portion of the first swinging frame 13 adjacent to the first swinging frame 13 is also the rod member 1 of the lifting device 10 that is the same as the first swinging member 13.
It is attached to the lower end of 0c so as to be able to swing freely within the vertical plane. Here, the lifting device 10 and the first swing frame 13
and constitute the rocking device.

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 swinging rod 16 made of a wood screw member is attached to the end of each second swinging frame 14 with 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 swinging rod 16 is screwed into the fork end 19, and by manually rotating the swinging rod 16, the second swinging frame 14 is moved to the first bearing 1.
5 in the direction of vehicle travel. Note that the swinging rod 16 may be rotated by an electric motor, a hydraulic motor, or the like.

A hydraulic motor 21 as a rotating device is attached to the second swing frame 14 with its output shaft 21a being arranged substantially vertically. At the lower end of the output shaft 21a, a conical cutting part 22 for cutting the asphalt pavement is provided with bolts,
They are each attached removably using taperings, etc. Here, the cutting portions 22 are arranged in a staggered manner as shown in FIGS. 3 and 4, and each cutting portion 22 is located at a portion of the cutting portion 22 adjacent to the surface substantially perpendicular to the vehicle traveling direction. The images are arranged so that the parts are projected overlappingly. As shown in FIGS. 6 and 7, the cutting portion 22 has a perpendicular line 22c connecting the truncated cone top surface 22a and the truncated cone bottom surface 22b substantially perpendicularly, and the truncated cone top surface 22a is arranged at its most vertical line. It is arranged almost horizontally at the bottom.

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 members 10c of each lifting device 10, 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 rotation direction of the cutting parts 22 is set so that every other cutting part is rotated in the opposite direction, as shown in FIGS. 8 and 9. 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, each cutting section 22 that swings the swinging arm 5 is set 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, a cutting device 1A according to the present invention is arranged on an inclined running road, while a tractor B is arranged on a flat part below the running road. Then, the support member C attached to the tractor B is connected to the cutting device A, and the support member C
and tractor B support the cutting device A so that it does not fall down. The length of the support 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 cutting device A cuts the asphalt pavement on the road by a predetermined thickness.

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 substantially parallel to the surface of the asphalt pavement as shown in FIG.

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

Then, when moving from the straight section F to the curved section F, each lifting device 10 is operated to move those rod 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. Thereby, the cutting part 22 is positioned so as to substantially follow the surface of the asphalt pavement of the curved part F, as shown in the overhead line in FIG.

Furthermore, by rotating each swinging rod 16,
Each second swing frame 14 is caused to swing around the bearing 15, and each cutting portion 22 is caused to swing within a substantially vertical plane formed in the vehicle traveling direction. Thereby, each cutting part 22
As shown by the chain line in FIG. 3, the truncated cone top surface 22a is positioned so as to face the construction direction by a predetermined amount.

In this state, the cutting device A is moved along the curved portion F 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 Figure 2, since the asphalt pavement is swung and positioned along the curved surface of the asphalt pavement, even if the curved part F is curved so that the central part is depressed, the asphalt pavement can be adjusted 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 by the dotted chain line in FIG. 12, so that the asphalt pavement can be cut to a substantially constant thickness corresponding to the curved shape of the curved portion F.

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 G to the curved part F.

Note that the cutting device A may cut the asphalt pavement by running in the vertical direction between the top end E and the lower part of the running path. Further, a plurality of cylindrical cutting portions may be provided with the cylindrical shaft thereof disposed in the vehicle width direction, or a plurality of cylindrical cutting portions may be provided with the cylindrical shaft disposed in the vertical direction.

<Effects of the Invention> As explained above, the present invention has the following features in claim 1:
Cutting in which a plurality of cutting parts are arranged so that some of the adjacent cutting parts overlap in a plane substantially perpendicular to the direction of vehicle travel, and the cutting parts are oscillated in a plane substantially perpendicular to the direction of travel of the vehicle. By providing this device, it is possible to cut the pavement with a constant thickness on both flat and curved surfaces.

In addition, in claim 2, the cutting part of claim 1 is swung in a plane perpendicular to the vehicle traveling direction to cut the pavement, so even if the surface of the pavement is curved. Pavement can be cut to a certain thickness.

[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-TV 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 diagrams for explaining the same operation. IO... Lifting device 13... First frame 1
4...Second swing frame 21...Hydraulic motor
22...Cutting part

Claims (2)

[Claims] (1) A plurality of cutting parts for cutting the pavement are arranged so that a part of adjacent cutting parts are projected substantially overlapping on a plane substantially perpendicular to the vehicle traveling direction, and each cutting part A pavement characterized in that a vehicle is equipped with a rocking device for rocking the cut portion in a plane substantially orthogonal to the direction of travel of the vehicle, and a rotating device for rotating each of the cutting portions about a rotation axis. Body cutting device. (2) A plurality of cutting parts for cutting the pavement are arranged so that a part of adjacent cutting parts are projected onto a plane substantially perpendicular to the direction of vehicle travel, and each of the cutting parts The pavement is cut by swinging the cutting parts in a plane substantially perpendicular to the vehicle traveling direction so as to contact the pavement, and moving the vehicle while rotating each of the cutting parts about a rotation axis. A method for cutting a pavement body characterized by: