JP3600124B2 - Paving road cutting equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pavement road surface cutting device for cutting a pavement road surface with a disk-shaped blade. In addition to suppressing overheating of the cutting powder, the cutting speed is increased, and the generated cutting powder can be collected efficiently.
[0002]
[Prior art]
Conventionally, this type of pavement road surface cutting device travels while rotating a road surface cutting blade pivotally supported by a vehicle body by an engine mounted on the vehicle body, and cuts the pavement road surface to a required depth by the blade.
[0003]
In the above cutting device, during the cutting operation by the blade, the bearing of the blade is easily overheated, and the blade is heated to a high temperature (for example, 600 ° C. to 800 ° C.) due to friction caused by the contact between the blade and the pavement road surface. Need to be cooled. As a cooling method for this blade, a water-cooling type in which water is jetted to the blade is generally used.In the case of the water-cooling type, the jetted water contains cutting powder, flows into sewage as muddy water, and sludge is formed. There are many problems, such as clogging sewage, and sludge that pollutes the road surface and necessitates cleaning of the road surface.
[0004]
In order to cope with the water-cooling problem, the present applicant has previously proposed in Japanese Patent Application Laid-Open No. 9-302613 a device for cutting a pavement road with a cooling device for blowing liquefied gas onto blades. As shown in FIG. 7, the cutting device 51 has a blade 53 rotatably supported at the front side of a vehicle body 52, and a liquefied gas cylinder 54 and a pipe provided between the cylinder 54 and the blade 53 in the vehicle body 52. A liquefied gas in a cylinder 54 is blown by a spraying tool 56 through a hose 55 to a blade 53 that cuts a pavement road surface R while rotating, thereby cooling the blade 53. . Since the liquefied gas is at a very low temperature, the blade 53 is sufficiently cooled, and at the same time, the sprayed liquefied gas immediately sublimates, so that the problem that occurs in the case of the water-cooled type is eliminated.
[0005]
[Problems to be solved by the invention]
However, in the case of the cooling method in which the liquefied gas is injected to the blade 53, there are problems that the cost of the liquefied gas is high and that maintenance such as procurement and replacement of the liquefied gas cylinder 54 is troublesome.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to cool a blade for rotating and cutting a pavement road surface easily and inexpensively and to collect dust from cutting powder at the same time.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is an apparatus that cuts a pavement road surface by running while rotating a disk-shaped blade pivotally supported on a vehicle body,
A blower and a cutting powder accumulation container are connected to each other with a hose on the vehicle body, and the tip suction port of the hose connected to the cutting powder accumulation container is mounted on an upper portion of a cover covering an outer periphery except a lower portion on a pavement surface side of the blade. open, by introducing more air intake of the blower inside the cover to the suction port, the blade simultaneously by the intake when the dust collecting the cutting chips accumulating vessel through the hose from the suction port of the cutting chips scattered in the cover A configuration that cools the blade by flowing fresh air into the cover from the lower opening, and
A filter is attached inside the cutting powder accumulation container, so that the cutting powder is collected in the powder accumulation container without being sucked into the blower side, and an exhaust port of the blower is opened inside the cover, A pavement cutting device is provided that returns blower exhaust for blade cooling.
[0008]
In the above pavement road surface cutting device, while the blade is being rotated and the pavement road surface is being cut, the suction dust collector including the blower, the cutting powder accumulation container and the hose removes the cutting powder generated along with the cutting from the blade. Since the suction and dust are continuously collected with a strong suction force from the suction port communicating with the surrounding cover, the cutting powder is not scattered on the road surface and the road surface is not stained. At the same time, due to the strong suction force of the suction dust collector, a sufficient amount of fresh air constantly enters through the lower opening of the blade, passes through the cover, and rapidly flows into the suction port communicating with the upper part of the cover. Therefore, the blades are always efficiently cooled by being exposed to a rapid flow of a sufficient amount of low-temperature air. In this way, it is possible to simply cool the blade heated to a temperature of 600 ° C. to 800 ° C. by friction with the pavement road surface without any cost or effort only by the flow of the air sucked by the cutting powder. it can.
[0009]
The blade is attached to one side or both sides of the front end of the vehicle body, and its rotation direction is counterclockwise, which rotates from below to above in the cutting direction, and the cutting powder soars upwards in the front of the cutting direction. , And is scattered inside the cover.
Conventionally, the blade is rotated clockwise in the opposite direction to scatter the cutting powder behind the cutting direction, but in this configuration, the cutting powder scatters toward the vehicle body side, and The problem that the cutting powder accumulates between the lower part and the road surface occurs.
In the present invention, in particular, a blade having a small diameter of about 6 inches can be used. Needless to say, a blade having a diameter of 6 inches or more can be used.
[0010]
As described above, the blower mounted on the vehicle body is connected to the cutting powder storage container mounted on the rear of the vehicle body via a hose, and the tip of the hose connected to the cutting powder storage container is opened at the top of the cover. To communicate with the inside of the cover.
When the cover, the cutting powder storage container, and the blower are connected via the hose as described above, the cutting powder in the cover can be collected at the front of the vehicle body and stored in the cutting powder storage container at the rear of the vehicle body. it can.
In addition, as described above, a filter is attached inside the cutting powder accumulation container so that the cutting powder accumulates in the powder accumulation container without being sucked into the blower side, and an exhaust port of the blower is provided. open to the inside of the cover, is returned to the exhaust of the blower for the blade cooling.
[0011]
It is preferable that the fan of the blower (blower) for generating suction force in the suction dust collector be rotated at a speed of 7000 times / minute to 8000 times / minute. With this rotation speed range, a strong suction force is provided to the suction dust collector, and an excellent cutting powder dust collection function and a blade cooling function can be exhibited.
[0012]
Further, in the suction dust collector, the cutting powder accumulation container for storing the sucked cutting powder has a lid, and the lid can be opened and closed by a one-touch operation. As described above, when the lid of the cutting powder accumulation container can be opened and closed with one touch, post-processing of the accumulated cutting powder can be performed quickly.
[0013]
Further, in the cutting device, a swinging lever is disposed between the rear wheel and the blade so as to protrude below the vehicle body, and a small roll for adjusting the cutting depth of the blade is rotatable at the lower end of the swinging lever. At the same time, the swinging lever is linked with the piston of the hydraulic cylinder to control the deflection angle, and the lowermost point of the small roll is set between the lowermost point of the rear wheel and the line connecting the lowermost point of the blade. It can be set to an arbitrary height within a predetermined height range.
[0014]
With the above configuration, the swing lever is rotated in the front-rear direction by operating the hydraulic cylinder, and the height of the small roll at the lower end is adjusted by the swing angle thereof, so that the cutting depth of the blade can be easily set to any depth. Can be.
In this case, the swing lever does not become a bar in the traveling direction of the vehicle body, and the small roll can continue cutting in the traveling direction of the vehicle body without any hindrance.
[0015]
In other words, the blade that cuts the pavement road surface to be cut in the depth direction, until the lowermost point of the small roll hits the surface of the pavement road surface, the body goes down with the cutting of the blade, so in the depth direction When the small roll for traveling hits the surface of the pavement, the swing lever becomes a stick, so that the vehicle body cannot be lowered and the cutting in the depth direction of the blade stops. Therefore, only by setting the swing angle of the swing lever, the height at which the lowest point of the small traveling roll is retained changes, so that the cutting depth of the blade can be easily adjusted.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the pavement road surface cutting device 1 includes rear wheels 3 on the left and right sides of the lower surface of the vehicle body 2 and a front wheel 4 that is pulled up during cutting. An engine 5 serving as a driving source for rotation and a driving source for rotating blades and blowers is mounted. The output of the engine 5 is of a self-propelled type which is transmitted to the rotation shaft (drive shaft) 7 of the rear wheel 3 via a speed reducer 6 by a belt or the like, and the rotation shaft (drive shaft) 9 of a blade 8 is transmitted by a belt or the like. It is configured to be transmitted to.
[0017]
In the above cutting device, a blade 8 for cutting the road surface is attached to one side of the front end of the vehicle body 2 and is covered with a cover 11. A suction dust collector 12 is mounted on the vehicle body 2 in order to collect cutting powder generated by cutting the blade 8 and cool the blade 8. The suction dust collector 12 includes a blower 13, a cutting powder storage container 15 connected to the blower 13 via a hose 17, and a hose 17 connecting the cutting powder storage container 14 and the cover 11. Further, an exhaust port 13 a of the blower 13 is opened inside the cover 11. The blower exhaust port does not need to be opened inside the cover.
[0018]
A pair of left and right operation rods 10 protruding horizontally rearward from both left and right sides of the vehicle body 2 are provided at an upper rear portion of the vehicle body 2, and a worker operates the left and right operation rods 10 to operate the traveling direction. Like that. The vehicle body 2 may not be of a self-propelled type by the engine 5 but may be of a manually pushed type in which an operator carries the operation rod 10 to travel.
[0019]
As described above, the pavement road surface cutting blade 8 is attached to the rotating shaft 9 so as to slightly protrude from the front end on one of the left and right sides of the front part of the vehicle body 2.
It goes without saying that the blades may be arranged on both sides.
The outer periphery of the blade 8 is covered with a cover 11 except for the lower portion on the pavement surface side, and the cover 11 is attached to a side surface of the vehicle body 2.
As shown in FIG. 2, the tip of the rotating shaft 9 penetrates the cover 11 and protrudes from the cover 11, and the blade 8 is fixed to the tip of the rotating shaft 9 by screws. In FIG. 2, one blade 8 is fixed to the rotating shaft 9, but a plurality of blades (for example, four blades) may be superposed and attached to the rotating shaft 9.
[0020]
As shown in FIG. 1, as shown in FIG. 1, the cutting powder flies upward and forward in the cutting direction and scatters inside the cover 11 as a counterclockwise rotation that rotates upward from below in the cutting direction X. Configuration. In particular, in this embodiment, a small-diameter blade having a diameter of 6 inches is used.
[0021]
Further, as shown in FIG. 1, the front wheel 4 is pulled up during the cutting operation, but when the cutting device 1 is transported to another cutting place, the front wheel 4 is lowered as shown in FIG. With the front wheels 4 descending and touching the ground, the front side of the vehicle body 2 is tilted upward so that the blades 8 do not contact the road surface, and the rear wheels 3 and the front wheels 4 rotate on the road surface and are conveyed.
[0022]
Further, in order to adjust the depth of the cut by the blade 8 near the front wheel mounting position, a swing lever 18 that rotatably supports a small roll 19 is mounted at the end. The cutting depth of the blade 8 is defined by a line connecting the small roll 19 and the lowest point of the rear wheel 3. That is, as the blade 8 cuts in the depth direction, the front of the vehicle body 2 gradually inclines downward, but when the small roll 19 hits the surface of the pavement road surface R, the swing lever 18 is engaged. As a rod, the lowering of the vehicle body 2 is stopped, and the cut in the depth direction of the blade 8 is stopped.
Note that the swing lever 18 only serves as a bar in the vertical direction of the vehicle body 2, and does not serve as a bar in the traveling direction of the vehicle body 2.
[0023]
The swing lever 18 is pivotally supported between the rear wheel 3 and the blade 8 at the lower side of the vehicle body near the front wheel, and the blade 8 is moved in accordance with the position of the lowest point of the small roll 19 attached to the lower end. The depth of cut is different.
When the lowermost point of the small roll 19 is below the line connecting the lowermost point of the rear wheel 3 and the lowermost point of the blade 8, the lowermost point of the blade 8 is always above the surface of the paved road surface R. Therefore, even if the blade 8 is rotated, the pavement road surface R is not cut at all.
[0024]
Specifically, as shown in FIG. 1, in the present embodiment, the swing lever 18 is configured such that θ ° is forward (55 ° in the present embodiment) and α ° is rearward (50 ° in the present embodiment). ). When the swing lever 18 is fully swung forward by θ ° (indicated by a solid line in FIG. 1), the cutting depth of the blade 8 becomes the deepest. On the other hand, when the vehicle is run with the front wheel 4 pulled down, the swing lever 18 is swung rearward to the full α °.
[0025]
As shown in FIG. 5, the swing angle of the swing lever 18 is set by fixing the upper end of the swing lever 18 to a rotating shaft 21 rotatably supported by a bracket 20 fixed to the vehicle body 2. At the same time, a drive lever 22 is also fixed to the rotating shaft 21. The drive lever 22 is connected to the tip of the piston rod 23a of the hydraulic piston 23. As the piston rod 23a of the hydraulic piston 23 is retracted into the syringe 23b, the swing lever 18 swings rearward in the direction indicated by the arrow q via the rotating shaft 21 as the drive lever 22 rises and rises. Move. In FIG. 4, as shown by the solid line, the swing lever 18 swings forward by θ ° with the piston rod 23a fully extended, and the piston rod 23a contracts completely, as shown by the one-dot chain line in FIG. The swing lever 18 swings back by α °.
[0026]
As described above, in the cutting device 1, the cutting depth of the blade 8 can be easily adjusted by changing the height of the lowest position of the small roll 19 for adjusting the cutting depth by setting the swing angle of the swing lever 18. become. Further, since the swing angle of the swing lever 18 can be set using the hydraulic piston 23, the swing angle setting operation of the swing lever 18 is very simple.
[0027]
In the cutting device 1, as shown in FIG. 1, the suction dust collector 12 that exerts a strong suction force is mounted on the vehicle body 2. The suction dust collector 12 is driven by the engine 5 and has a blower 13 exhibiting a strong suction force, a cutting powder accumulation container 15 having a lid 14 for storing the suctioned cutting powder, a cover 11 and a cutting powder accumulation storage. A hose 16 connecting between the containers 15 and a hose 17 connecting between the cutting powder accumulating container 15 and the blower 13, wherein a suction port at the tip of the hose 16 communicates with the inside of the cover at the upper part of the cover 11. And
[0028]
The blower 13 has a very strong suction force in which the fan rotates at a speed of 7000 times / minute to 8000 times / minute. When the blower 13 is started, a large amount of air (outside air) is sucked at a high speed through the opening of the lower end of the cover 11 → inside the cover 11 → the hose 16 → the cutting powder accumulation container 15 → the lid 14 → the hose 17 → the blower 13. . In addition, the exhaust of the blower 13 returns to the inside of the cover 11.
[0029]
The lid 14 of the suction dust collector 12 is configured to be opened and closed by a one-touch operation. That is, as shown in FIG. 3, when the user grips the lower end of the handle HD, the upper end of which is pivotally supported by the support bar SB, and turns it upward as shown by the arrow, as shown in FIG. As the bending rod RD is pulled up along with the handle HD, only the lid 14 is lifted, and the lid 14 of the cutting powder accumulation container 15 is opened. When the lid 14 is opened, the cutting powder accumulated in the cutting powder accumulation container 15 is taken out and cleaned. When the cutting powder has been cleared and the lid 14 is closed, it is only necessary to press the lid 14 against the cutting powder accumulation container 15 from above.
As described above, since the lid 14 can be opened and closed with a single touch, it is possible to quickly clean up the cutting powder accumulated in the cutting powder accumulation container 15.
[0030]
While cutting the pavement road surface R while rotating the blade 8 by the suction dust collector 12, the cutting powder generated by the cutting is strongly discharged from the suction port of the hose 16 communicating with the cover 11 covering the outer periphery of the blade 8. Continue to collect dust by suction. As described above, since the cutting powder is sucked up by the suction dust collector 12 and is quickly collected, there is no fear that the cutting powder scatters on the road surface and stains the road surface. Note that a filter FT is provided in the lid 14 so that the cut powder always accumulates in the container 15 without going to the blower 13. Therefore, the hose 16 is connected to the lid 14 at a position below the filter FT, and the hose 16 is connected to the lid 14 at a position above the filter FT.
[0031]
On the other hand, due to the strong suction force of the blower 13 of the suction dust collector 12, a sufficient amount of fresh air constantly enters through the lower opening of the blade 8 and is sucked in the cover 11, and the suction communicating with the upper portion of the cover 11 Rapidly enters the mouth. Therefore, since the blade 8 is always exposed to the rapid flow of a sufficient amount of low-temperature air, the blade 8 is subjected to friction with the pavement road surface R due to the flow of air accompanying the suction of the cutting powder, for example, at 600 ° C. The blade 8 heated to 800 ° C. can be efficiently cooled. Further, exhaust gas discharged from the blower 13 into the cover 11 also hits the blade 8 to cool the blade 8. As a result, the road surface can always be cut at a sufficient cutting speed.
[0032]
As shown in FIG. 3, when the handle 24 provided on the upper right side of the rear side of the cutting device 1 is turned, the device 1 is configured to be manually moved forward and backward, and both rear wheels 3 The gears are connected by a differential gear 25 so that the device can be easily turned.
Further, as shown in FIG. 1, a rod 27 provided with a pointer guide needle 26 for confirming the traveling direction is provided at the front side of the cutting device 1, and during the cutting operation, the rod 27 is tilted horizontally so that the pointer The cutting direction can be confirmed by checking whether or not the tip of the cutting line 26 coincides with the cutting line.
[0033]
The asphalt pavement road surface R was actually cut using the cutting device 1 having the above configuration. The swing angle of the swing lever 18 at this time was set to θ ° to the front side so that the cutting depth became maximum, and the rotation speed of the fan of the blower 13 was set to 7000 times / minute.
It was confirmed that the pavement road surface R can be rapidly cut by the rotation of the blade 8. At the same time, it was confirmed that the cutting dust was quickly accumulated in the cutting dust accumulation container 15 by the operation of the suction dust collector 12, and that the blade 8 was sufficiently cooled. Incidentally, when the diameter of the blade 8 was set to 8 inches, the asphalt pavement road surface R could be cut to a depth of 5 cm over a distance of 200 m in one hour by the cutting device 1 of the first embodiment.
[0034]
【The invention's effect】
As is apparent from the above description, according to the pavement road surface cutting device of the present invention, the suction dust collector continuously suctions and collects the cutting powder generated along with cutting the pavement road surface with a strong suction force. Therefore, the cutting powder is not scattered on the road surface and the road surface is not stained. At the same time, the blades are constantly exposed to a rapid flow of a sufficient amount of low-temperature air due to the strong suction force of the suction dust collector. The heated blade can be easily cooled without cost and effort. Therefore, it is possible to always cut the pavement road surface at a sufficient cutting speed.
[0035]
In addition, when the fan of the blower (blower) for generating suction force in the suction dust collector of the cutting device is rotated at a speed of 7000 times / minute to 8000 times / minute, the suction force becomes stronger, so that an excellent cutting powder dust collecting function is provided. And a blade cooling function.
Further, since the cutting powder soars in the rotation direction of the blade in front of and above the cutting progress direction and is scattered in the cover, dust of the cutting powder can be collected efficiently.
[0036]
Furthermore, if the cutting powder accumulation container with a lid for storing the cutting powder sucked by the suction dust collector can be opened and closed by a one-touch operation, the collected cutting powder can be quickly cleaned up.
Furthermore, if the swing angle of the swing lever for cutting depth adjustment with a small roll attached to the tip is set by a hydraulic piston, the swing angle setting operation of the swing lever is also very simple, The depth of cut can be easily adjusted.
[Brief description of the drawings]
FIG. 1 is a side view showing a state in which a cutting device according to an embodiment of the present invention is cutting a pavement road surface.
FIG. 2 is a sectional view showing a configuration around a blade of the cutting device.
FIG. 3 is a rear view showing the cutting device as viewed from the rear side.
FIG. 4 is a schematic view showing a state in which the cutting device is moving.
FIG. 5 is a front view showing a state of a swing lever of the cutting device.
FIG. 6 is a rear view showing a state in which the lid of the cutting powder accumulation container in the cutting device is opened.
FIG. 7 is a side view showing a schematic configuration of a conventional cutting device.
[Explanation of symbols]
DESCRIPTION OF REFERENCE NUMERALS 1 Pavement road surface cutting device 2 Body 3 Rear wheel 8 Blade 9 Rotary shaft 11 Cover 12 Suction dust collector 13 Blower 14 Cover 15 Cutting powder accumulation container 16, 17 Hose 18 Swing lever 19 Small roll for traveling 23 Hydraulic piston R Pavement road surface

Claims (2)

An apparatus that cuts a pavement surface by running while rotating a disk-shaped blade pivotally supported on a vehicle body,
The blower and the cutting powder accumulation container are connected to each other with a hose on the vehicle body, and the tip suction port of the hose connected to the cutting powder accumulation container is mounted on the upper portion of the cover covering the outer periphery except for the lower portion on the pavement surface side of the blade. open, by introducing more air intake of the blower inside the cover to the suction port, the blade simultaneously by the intake when the dust collecting the cutting chips accumulating vessel through the hose from the suction port of the cutting chips scattered in the cover A configuration that cools the blade by flowing fresh air from the lower opening into the cover, and
A filter is attached inside the cutting powder accumulation container, so that the cutting powder is collected in the powder accumulation container without being sucked into the blower side, and an exhaust port of the blower is opened inside the cover, A pavement cutting device that returns the blower exhaust to cool the blades. The pavement road surface cutting device according to claim 1, wherein the blower is rotationally driven by an engine mounted on the vehicle body, which is a driving source for driving the vehicle body and a rotational driving source for the blades.

Images