JPH0323684B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a device for cutting strip lines installed on a paved road surface.

BACKGROUND OF THE INVENTION On concrete or asphalt pavement surfaces, indication lines such as the roadway center line, roadway boundary line, and roadway outside line are usually attached to indicate the range of vehicle traffic. These instruction lines are
Usually, it is applied using line markers, and the method is to apply liquid paint along the indicated lines using line markers. This applied paint adheres to the road surface in a raised manner.
However, when vehicles equipped with spiked tires or tire chains to prevent cars from slipping pass during the winter, the degree of damage to the road surface is extremely large, and the painted lines are scraped off and worn away in a short period of time. However, even if the line is not worn out, if the line is scratched and thinned, it becomes difficult to distinguish it, especially at night.

For this reason, a method is used in which the line is not painted openly on the road surface, but instead is formed by digging a shallow groove and fitting the line into the groove. With this method, the paint does not build up on the road surface, so it is less likely to be scraped off by spiked tires or tire chains, and compared to the traditional simple application method,
It can perform its function for quite a long time.

This method of cutting a shallow groove in a road surface involves attaching a cutting device having a cutter to a construction work vehicle, moving the vehicle along a guideline, and cutting a shallow groove in the road surface with the cutter.

Problems to be Solved by the Invention In the method using the above-mentioned cutting device, a cutter passes over a guideline to cut a shallow groove, and a straight groove can be cut along the guideline. However, grooves can be cut according to these standards only when the road surface is flat, has no irregularities, and the road surface on which the car body is placed is at the same slope as the road surface to be cut. If the road surface where the car body is located and the road surface where the cutting part is not on the same plane due to unevenness or ridges, or if the cutting edge of the cutter becomes worn, the depth of the groove to be cut may differ. , it is not possible to cut an accurate groove of constant depth. If the groove depth is not uniform,
If the upper surface of the band-shaped line marking that is inserted into this line protrudes from the road surface or is deeply sunken into the road surface, not only is it unsightly, but it also protrudes above the road surface, it should be removed with spike tires. If the area is sunken, there is a risk that it will be covered with earth and sand, making it difficult to see, both of which are undesirable. In addition, the cutter itself does not always cut the road surface under the same conditions, resulting in situations such as cutting the road surface too shallowly, or cutting the road surface deeply, making it impossible to cut.
This is not desirable as it may cause damage or malfunction.

The purpose of this invention is to solve the above problem.Even if the road surface where the car body is located and the road surface where the cutting part is located are not on the same plane in the longitudinal direction, the cutter always leaves grooves of the same depth on the road surface. The purpose is to provide a device that can perform cutting.

Means for solving the problem The means of the present invention taken to solve the above problem are as follows: (a) A slide beam frame is attached to the front of a construction work vehicle, a slide beam is inserted into the frame, and the slide beam is moved left and right by a hydraulic cylinder. I did what I could.

(b) A support arm is attached to one end of the slide beam so that it can move up and down, and is operated by a hydraulic cylinder.

(c) A bearing frame is fixedly provided at the lower part of the front end of the support arm, and the front shaft of the cruciform shaft is mounted on the bearing frame with its axis facing in the front-rear direction and rotating around the axis. It is fitted so that it can move, and wheels are attached to the left and right axes of the cruciform shaft, respectively.
In addition, the rear part of the cross-shaped shaft and the lower front bracket of the casing for the cutter device are connected by horizontal pins, and the casing is rotated in the vertical direction by a hydraulic cylinder installed between the support arm and the casing. That's what I did.

(2) The cutter device has a cutter for cutting road surfaces and a hydraulic motor to drive the cutter, and the upper part is connected to a support arm by a hydraulic cylinder.

It is.

Function Even if the road surface is not flat and there is a difference in the horizontal inclination angle between the road surface of the vehicle body and the road surface of the cutting section, the cutter can cut grooves of the same depth in the road surface. Furthermore, since the cutter device can be slid in left and right directions, it can be easily moved to the device to be cut on the road surface.

Embodiment 1 is a construction work vehicle, in which a pair of left and right brackets 2 are fixed to the front part of the vehicle, and a beam frame 3 is attached to these.
are fixed horizontally on both sides. The beam frame 3 is box-shaped with both sides open, and a slide beam 4 is slidably inserted into the beam frame 3. In order to facilitate this sliding, a slide pad is provided inside the beam frame 3. 5 is attached. Even if one side of the slide beam 4 protrudes to the side of the vehicle body 1,
The other side is long enough to protrude laterally from the beam frame 3, and a guide plate 6 is fixed vertically to the front side of both the left and right sides, and a guide plate 6 is fixed to the upper part in a state of protruding forward. Bracket 7 is fixed,
Furthermore, a bracket 8 is provided inside thereof to protrude forward, and the bracket 8 and the beam frame 3 are connected to each other.
A hydraulic cylinder 10 is mounted between a bracket 9 protruding forward from the center of the frame, and the hydraulic cylinder 10 is actuated to move the slide beam 4 left and right.

Reference numeral 11 denotes a support arm, which has a □-shaped cross section and a downwardly extending front part.A bracket 12 for attaching to the slide beam 4 is fixed to the rear part of the support arm. While holding the guide plate 6 of 4 from the front and back,
Pairs of guide rollers 13 are attached so that the support arm 11 can move up and down. 14 is a hydraulic cylinder for moving the support arm 11, the upper part of which is attached to the bracket 7 of the slide beam 4;
The lower parts are respectively connected to the rear parts of the support arms 11. A bracket 15 is provided in the middle of the support arm 11 to project downward, and a hydraulic pressure for adjusting the cutting depth of the cutter 35 is provided between the bracket 15 and a bracket 17 projecting from the upper part of the cutter device 16 located below. Cylinder 18 is installed.

A bearing frame 21 is fastened to the front end of the support arm 11 with bolts 22, as shown in FIG.
The bearing frame 21 is for supporting a cross-shaped shaft 23, and has radial ball bearings 24a and 24b inside.
Radial ball bearings 24a and 24b, including thrust ball bearings 24c and 24d, are arranged at the front and rear of a shaft 25 at the front of the cruciform shaft 23, respectively, so that the shaft 25 rotates about its axis. I believe that. In addition, thrust ball bearings 24c and 24
d are arranged on the front and rear sides of the shaft 25, respectively, so as to support the load acting in the axial direction of the shaft 25. The cross-shaped shaft 23 supports the front end of the support arm 11, and also supports the cutting device 1.
6, the plane is formed in a cross shape, and wheels 27 are pivotally supported on the left and right shafts 26, and the front shaft 25 is fitted into the bearing frame 21 as described above. , the rear part 28 is a casing 29 of the cutter device 16
It is connected to a bracket 30 at the front lower part of the body by means of a left-right pin 31 so as to be vertically rotatable. Therefore, the front part of the support arm 11 is supported by the wheels 27, and the cutter device 16 is configured to be pulled by the support arm 11 via the cross-shaped shaft 23.

The cutter device 16 includes a box-shaped casing 29 with its lower part open, a hydraulic motor 32 installed on the top of the casing 29, and an internally supported shaft 33 in the left and right direction.
A cutter 35 driven by a belt 34 stretched between the cutter 35 and a hydraulic motor 32; a suction hole 36 provided in front of the cutter 35 and curved upward for discharging cut soil; Furthermore, the cutter 35 has a suction port 37 opened laterally at its upper end, and a cutter 35 projects slightly downward from the casing 29, so that the cutter 35 cuts the road surface.

The present invention is constructed as described above, and during work, the car body 1 is arranged so that the cutter device 16 is approximately on the guideline and the car body 1 is parallel to this. Operate the hydraulic cylinder 10 to operate the slide beam 4, adjust the cutter 35 so that it is exactly in the center of the guideline, and operate the hydraulic cylinder 14 to ensure that both the left and right wheels 27 of the cruciform shaft 23 properly touch the road surface. Make sure you stay there. The hydraulic motor 32 is operated to rotate the cutter 35, and the hydraulic cylinder 18 is manually operated to start cutting into the road surface with the cutter 35, and a predetermined cutting depth is determined. The cut pieces cut by the cutter 35 are discharged outward from the suction port 37 through the suction hole 36.

Next, if the road surface is not flat due to unevenness or height, or if the machine runs on the side of the road and needs to be cut at a slight incline,
Hydraulic cylinder 18 or hydraulic cylinder 14
is operated to move the cutter device 16 up and down or tilt it left and right to perform the cutting operation in a state that corresponds to the cutting road surface. For example, if the line to be cut is on the side of the road surface, the machine must be cut while riding on the sidewalk, and the machine body will be in a state of inclination with respect to the road surface. In such a case, the hydraulic cylinder 18 is operated to tilt the cutter device 16 to the right or left about the shaft 25 of the cruciform shaft 23 at the front, thereby holding the cutter 35 perpendicular to the road surface. By doing so, it is possible to cut a desired cutting groove with no difference in left and right depths, regardless of the situation of the machine body 1. Even when cutting the center part of the road surface, if the part to be cut with the cutter 35 is slightly inclined to the left or right and is not on the same plane as the machine body 1, operate the hydraulic cylinder 18 in the same way as described above to slightly move the cutter device 16. By tilting the cutter 35, it is possible to adjust the cutter 35 to the cutting state, and it is possible to cut grooves with the same depth and no difference in depth on the left and right sides.

Also, move the slide arm to the left and right and support arm 1.
1 can be moved up and down, so when the work is stopped and moved, it can be moved quickly and stably, and even if there is an obstacle, it can be avoided.

In addition, since the cutter device 16 is configured to be pulled by the support arm 11, the cutter device 16 can be pulled during work.
Its direction is always regulated by the support arm 11, so there is no risk of it shifting to the side, and it is possible to cut the correct groove by being guided by the support arm 11.

Next, when it is tilted in the front-back direction,
If the position of the machine body 1 and the cutting part are inclined at the same rate on a slope, etc., in other words, if they are on the same plane, there is no problem, but if the cutting part is rising relative to the position of the machine body 1 , or if it is descending, the cutting groove will become deeper or shallower if cutting is continued in the same state as before, and it will not be possible to cut a groove of the same depth as before. In such a case, the hydraulic cylinder 14 is operated to push up or push down the support arm 11. Since the vertical position of the cutter device 16, that is, the cutter 35 changes with respect to the machine body 1, the cutting depth of the cutter 35 can be adjusted even if there is a height difference between the machine body 1 and the cutting road surface.

If there are small irregularities on the road surface, i.e., only the area near the part to be cut by the cutter 35 at the rear of the wheel 27 is low or high, the support arm 11 can be moved up and down using the hydraulic cylinder 14. However, due to the presence of the wheels 27, it is not possible to respond sufficiently. In such a case, the cutting depth by the cutter 35 can be adjusted by operating the hydraulic cylinder 18 to rotate the cutter device 16 around the pin 31.

When stopping the work and moving, the hydraulic cylinder 14 is operated to lift the support arm 11. The front lower part of the support arm 11 and the cutter device 16
The lower part of the car is off the road, so you can move it without any trouble. Moreover, if the hydraulic cylinder 10 is contracted and the slide beam 4 is drawn inward, the support arm 1
1. Since the cutter device 16 etc. is moved inward, the fuselage 1
can be moved in a stable manner.

As described above, in the present invention, the slide beam, support arm, and cutter device are attached to the car body and are operated by hydraulic cylinders, so even if there is a difference in height between the car body and the cutter at the front and rear, or between the left and right Even if there is a difference in slope, it is possible to cut a groove that is suitable for the cutting road surface.

[Brief explanation of drawings]

The drawings are all embodiments of the present invention, but the first
The figure is an overall front view, Figure 2 is a view seen from A in Figure 1, Figure 3 is a view seen from B in Figure 1, Figure 4 is an enlarged view of section C in Figure 1, and Figure 5 is an enlarged view of section C in Figure 1. The figure is a view seen from D in FIG. 4, and FIG. 6 is a sectional view taken along the line EE in FIG. 4. 1...Vehicle body, 3...Beam frame, 4...
Slide beam, 10...Hydraulic cylinder, 11...
...Support arm, 14...Hydraulic cylinder, 16...
Cutting device, 18... Hydraulic cylinder, 23... Cruciform shaft, 25... Shaft (cruciform shaft front part), 32...
Hydraulic motor, 35... cutter, 36... discharge hole.

Claims (1)

[Claims] 1. A beam frame is attached to the lower part of a construction work vehicle, a slide beam is fitted into the frame so as to be movable left and right using a hydraulic cylinder, and a support arm is attached to one end of the slide beam and moved up and down using a hydraulic cylinder. A bearing frame is fixedly provided at the lower part of the front end of the support arm, and the front axis of the cruciform shaft is attached to the bearing frame so that its axis is oriented in the front-rear direction and its axis is A wheel is attached to each of the left and right axes of the cross-shaped shaft, and the rear of the cross-shaped shaft and the lower front bracket of the casing for the cutter device are connected to the left and right pins. A structure of a road cutter device characterized in that the support arm and the casing are connected to each other by a hydraulic cylinder provided between the support arm and the casing, and the casing is rotated in the vertical direction. 2 The cutter device has a cutter for cutting road surfaces and a hydraulic motor that drives the cutter, and the front part is rotatably connected to the front part of the support arm about axes in the front-back and left-right directions. The structure of the road cutter device according to claim 1, which is connected to the support arm via a hydraulic cylinder.