JP3653237B2 - Pavement surface cutting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a circular paved surface to form a hole for construction in manhole installation work, pipe construction such as gas pipes and water pipes, and repair and inspection work of pipes already buried. It relates to the method of cutting.
[0002]
[Prior art]
In general, construction of new manholes on paved roads, construction of pipes such as gas pipes and water pipes under paved roads, or repair and inspection of pipes that have already been buried When performing construction, it is necessary to break the asphalt and concrete pavement on the road surface to expose the ground.
[0003]
At this time, it is necessary to minimize the range of breaking the pavement surface in order to maintain the aesthetics of the re-paved pavement surface after construction and to reduce the cost of re-paving. Most preferably, it is cut into pieces.
In particular, in manhole installation work, it is desirable to cut the pavement surface concentrically with the manhole installation position.
And by cutting the pavement surface into a circle in this way, it becomes easy to uniformly roll the repair compound during the main repair after the construction.
[0004]
Conventionally, the following method is used to cut a painted surface into a circle.
That is, the first method is a method in which a ring member is pressed into an asphalt pavement surface softened by heating to cut the asphalt pavement surface, and the second method is a ring cutter formed with an outer diameter to be cut. This is a method of cutting by entering the asphalt pavement surface.
FIG. 7 shows the first method, in which the asphalt pavement surface GL is heated and softened by the burner A, and then, as shown in FIG. 8, a steel cylindrical ring having the required diameter. B is pressed into the asphalt pavement surface GL and cut.
FIG. 9 shows a second method, in which a paved surface is cut through a circular shape using a cylindrical cutter C having a cutting edge C1 formed at the lower end edge.
[0005]
[Problems to be solved by the invention]
However, the first method has a problem that the time required for construction such as heating is long and the cut surface becomes rough.
Furthermore, the diameter of the round hole to be formed is determined by the diameter of the cylindrical ring B prepared at the site, and there is a problem that the diameter of the round hole cannot be arbitrarily set.
Further, in the second method, the cutter C is a consumable part and is expensive, and is large and heavy, so that a large power source and a dedicated vehicle are required to perform cutting with the cutter C. There is a problem that the time and labor required for installation and removal become very large.
Furthermore, similarly to the first method, the diameter of the round hole to be formed is determined by the diameter of the cutter C prepared at the site, and there is a problem that the diameter of the round hole cannot be arbitrarily set. doing.
[0006]
On the other hand, in the conventional cutting method described above, not only the diameter of the round hole to be cut but also the forming direction thereof is limited. In other words, as a form of cutting a round hole, as can be obtained by the first and second methods, an inner wall perpendicular to the ground can only be formed. For this reason, when the road surface is restored by filling asphalt at the end of excavation after the formation of the round hole, there is no asphalt receiving surface in the surface layer part, and the filled asphalt surface layer part easily slides down in the hole. As a result, road surface depression may occur.
[0007]
Object to a first aspect of the present invention, the light of the problems in the conventional cutting apparatus, switching cutting method of the pavement surface with a structure capable of preventing an increase in cost required for the cutting and enables a reduction in equipment and time required for construction Is to provide. As a second object is to provide a switching cutting method of pavement which may as road surface depression during backfill does not occur.
[0008]
[Means for Solving the Problems]
In order to achieve this object, the invention according to claim 1 is provided with a fulcrum member that is fixed at an arbitrary position on the pavement surface and serves as a fulcrum, and the fulcrum member is provided at an end in the extending direction, and is opposed to this end A base that is movable on a circumference drawn with a radius centered on the fulcrum member, a cutting drive source support member that is tiltable with respect to the base, and the cutting A cutting drive source integrated with the drive source support member, and a rotary blade that is rotationally driven by the cutting drive source. The rotary blade has a straight blade surface in a section along the rotation axis. The blade surface is a frustum that bulges outward with respect to the fulcrum with the blade surface as a side surface, and the inclined direction along the paved surface of the blade surface intersects the traveling direction of the blade surface. while being attached to the cutting drive source, front and back surfaces and peripheral surface cutting edge provided these the rotary blade A cutting method using it are cutting apparatus, the base is placed on the cutting relevant sections, defining a cutting center pierce the fulcrum member in the support position of the cutting corresponding position, the relative to the base The rotary blade is adjusted to an angle corresponding to the cutting radius and then lowered to cause the rotary blade to enter the pavement surface, and the fulcrum position is moved to the direction of advancement with the fulcrum position as the center, thereby centering on the fulcrum position. It cuts in the circumferential direction according to the cutting radius.
[0009]
According to a second aspect of the present invention, in the cutting method according to the first aspect , a rolling wheel is detachably provided on the base, and the base is equipped when the tilt angle of the rotary blade is changed. And changing the diameter of one of the width directions orthogonal to the rotational movement direction around the fulcrum member with respect to the other, and tilting the cutting drive source support member One of the cases is selected and the rotary blade enters the pavement surface.
[0010]
According to a third aspect of the present invention, in the cutting method according to the second aspect , the approach direction of the rotary blade is a direction in which a hole perpendicular to the ground can be formed in a cross section by the setting of the inclination angle, and a forward direction with respect to the ground. One of the directions in which a hole whose diameter is reduced can be formed is selectable.
[0019]
[Action]
In the excavator, when the rotary blade moves on a radius centered on the fulcrum member, the rotary blade has a straight blade surface in a cross section along the rotation axis, and the blade surface serves as a side surface. A frustoconical shape that bulges outward with respect to the fulcrum, is mounted on the cutting drive source so as to cut the pavement surface with the blade surface, and cutting blades are provided on both the front and back surfaces and the peripheral surface of the rotary blade. because are, as shown in FIG. 2 (B), will be the resultant force G of the resistance force P from soil acting on the force F1 and the blade surface of the moving direction along the inclination direction of the blade surface, the rotation The blade can be smoothly advanced. This makes it possible to perform a quick cutting operation by a simple operation regardless of the diameter of the round hole to be cut and without requiring a large facility . In addition, the angle of the rotary blade is adjusted to an angle according to the cutting radius and lowered so as to enter the pavement surface, and the swollen surface of the rotary blade is used by a simple operation of moving the base in the traveling direction. Cutting can be performed by moving the rotary blade in the circumferential direction drawn by the radius of rotation.
[0020]
Further, according to the present invention, when changing the inclination angle of the rotary blade, among the wheels mounted on the base, one of the width directions orthogonal to the rotational movement direction centering on the fulcrum member is selected. Either the case where the diameter is changed with respect to the other one or the case where the driving source support member for cutting is tilted is selected, and the rotary blade can be advanced toward the ground. Depending on the angle, in particular, a hole whose diameter in the direction of travel in the cross section can be reduced in diameter can be formed, so that a receiving surface can be formed according to the amount of asphalt filled during backfilling, and the surface of the asphalt surface layer can be prevented from falling It is possible to prevent the occurrence of depression.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the illustrated examples.
FIG. 1 is a schematic diagram for explaining the configuration of a cutting apparatus according to an embodiment of the present invention.
In FIG. 1, the cutting device 1 includes a fulcrum support member 4 that is integrated with a side surface of a base 3 including an operation handle 2 and can be parallel to a pavement surface GL.
One end of the fulcrum support member 4 is fixed to the base 3, and the other end of the fulcrum support member 4 is detachably provided with a fulcrum member 5 that can pierce the pavement surface. As shown in FIG. 1 (B), the fulcrum member 5 is mounted and fixed in any one of the support holes 4A formed in the fulcrum support member 4 along the extending direction. Each of the holes 4A is formed at a position where a cutting radius by a rotary blade described later can be set.
In the vicinity of the support hole 4 </ b> A, a radius display portion is provided by numerical display so that the position for inserting the fulcrum member 5 can be easily selected.
[0027]
The base 3 is provided with a cutting drive source support member 6 supported so as to be tiltable via a support shaft 3A. The cutting drive source support member 6 includes a cutting drive for a rotary blade 7 to be described later. The electric motor 8 which makes a source is attached.
A rotary blade 7 is attached to the output shaft of the electric motor 8.
1 to 3, the rotary blade 7 has a surface 7 </ b> A that bulges outward across a circumference (indicated by a symbol L in FIG. 3) drawn by a radius set by the position of the fulcrum member 5. The inner surface has a dish shape that is inclined at the same angle as the outer surface.
As shown in FIGS. 2 and 3, the front and back surfaces of the rotary blade 7 are formed with cutting surfaces 7 </ b> A <b> 1 in which diamond chips are embedded in regions arranged at equal intervals along the circumferential direction. The cutting surface 7A1 is also provided on a peripheral edge (portion indicated by reference numeral 7A2 in FIG. 2) that is an entry portion to the pavement surface. Further, a cut portion (indicated by reference numeral 7A3 in FIG. 2) is formed in the circumferential surface of the rotary blade 7 at the approximate center of each cutting surface 7A1 in the circumferential direction, reducing resistance during cutting and frictional heat. It is designed to be a heat dissipation surface.
[0028]
As shown in FIG. 4, the rotary blade 7 rotates in a direction (indicated by reference numeral C in FIG. 4) that moves in the same direction at the contact position with the pavement surface GL with respect to the traveling direction F of the cutting device. In other words, the base 3 rotates in the direction in which the traveling direction of the base 3 is reversed. As a result, the direction in which the base 3 moves to cut the round hole and the direction in which the reaction force from the soil acting when the rotary blade 7 enters the pavement surface are contradictory to each other. Therefore, unlike the case where the rotary blade 7 rotates in the moving direction of the base 3, it is possible to prevent a progression that causes a rapid speed increase when the rotary blade 7 enters the pavement surface. Thus, the runaway of the cutting device 1 is prevented.
[0029]
In FIG. 1, a cover 9 having an open bottom is attached to and integrated with a base 3 so as to cover an upper space of the rotary blade 7.
A suction port member 10 is provided in the upper space of the rotary blade 7 so as to face the suction blade member 10, and the suction opening member 10 communicates with a dust collecting member 12 and a suction pump 13 installed outside by a hose 11.
In FIG. 1, reference numeral 14 denotes a skirt member that shields the lower periphery of the base 3 from the outside, and makes it difficult for the dust generated from the cutting position to be leaked to the outside during cutting by the rotary blade 7.
[0030]
Since the present embodiment has the above-described configuration, the fulcrum member 5 is inserted into the support hole 4A at the position corresponding to the cutting radius among the support holes 4A in the fulcrum support member 4 at the corresponding cutting positions on the pavement surface. The fulcrum member 5 is stabbed into the pavement surface.
As shown in FIG. 3, the rotary blade 7 is set to an angle at which the approach direction is perpendicular to the pavement surface GL (an angle at which a vertical line indicated by reference sign S <b> 1 in FIG. 3 is obtained). For this reason, the cutting drive source support member 6 is tilted with respect to the base 3 so that the approach angle of the rotary blade 7 is obtained, and the angle is adjusted.
Adjustment of the approach angle of the rotary blade 7 can be performed by inclining the cutting drive source support member 6 about the support shaft 3A mounted on the base 3 and maintaining the inclined state.
[0031]
In addition to the case where the approach angle of the rotary blade 7 is set to be perpendicular to the pavement surface GL, the cutting drive source support member 4 is arranged from the position of the support hole 4A having the smallest diameter among the support holes 4A of the fulcrum support member 4. However, it is also tilted when a round hole with a smaller diameter is cut. In this case, the angle is set to an angle at which the peripheral edge of the rotary blade 7 can enter inside the radius centered on the fulcrum member 5 (an angle indicated by reference sign S2 in FIG. 3). Thereby, as indicated by the symbol R in FIG. 3, it is possible to cut a round hole in which a circumference having a radius R <b> 1 smaller than the minimum radius obtained by the position of the support hole 4 </ b> A of the fulcrum support member 4 is obtained.
The tilting is not limited to the cutting radius described above, but can be performed according to the size of the blade, that is, the blade width and the diameter of the blade. In any case, the blade can easily enter the pavement surface. Can be made easier to cut.
[0032]
As shown in FIG. 4, the rotary blade 7 facing the pavement surface is rotating in the direction in which the base 3, in other words, the cutting device 1 is advanced, on the side opposite to the traveling direction F of the cutting device 1. The rapid increase in speed as in the case of rotating in the same direction as the direction is prevented, and the entry in the pavement surface is smoothed. Moreover, as shown in FIG. 2 (B), the rotary blade 7 has a frustoconical shape in the process of moving within the pavement surface, so that the cutting device 1 (blade surface) has a force F1 in the advancing (moving) direction and a bulging surface. The resultant force G with the resisting force P from the working soil will be along the inclined direction along the pavement surface of the blade surface , which will result in smooth movement, and the labor required for cutting and Time will be reduced.
[0033]
Next, a partial modification of the configuration shown in FIG. 1 will be described.
5 and 6 are diagrams showing a configuration obtained by modifying a part of the configuration shown in FIG. 1, and the example shown in FIG. 5 sets the inclined state of the rotary blade 7 in the configuration shown in FIG. In doing so, the base 3 itself is tilted. 5 and 6, the same components as those shown in FIG. 1 are denoted by the same reference numerals.
In FIG. 5, a cutting drive source support member 6 is slidably provided.
The cutting drive source support member 6 is slid in the direction of the arrow shown in parallel with the one operation handle 15 by a guide member 16 fitted to the other operation handle 15 provided in parallel with the operation handle 2. The sliding position can be identified by a numerical value display member 17 provided in the vicinity of the other operation handle 15.
[0034]
Wheels 18 are provided at the corners of the lower surface of the base 3 so as to be attachable to and detachable from the base 3. Of the wheels 18, the width of the base 3 is perpendicular to the traveling direction of the rotary blade 7. One can be replaced with one having a different outer diameter with respect to the other, and the base 3 can be inclined by replacing one wheel 18 with a wheel having a larger diameter than the other. It has become.
The state shown in FIG. 5 is a case where the wheels 18 on both sides in the width direction of the base 3 have the same diameter. In this case, the traveling blade 7 travels in a direction perpendicular to the ground as the traveling direction of the rotary blade 7 with respect to the ground. In the figure, the installation angle of the rotary blade 7 that can form a hole having a wall surface as indicated by reference numeral P1 is set.
In the state shown in FIG. 6, one of the wheels 18, in the example shown in FIG. 6, the wheel (indicated by reference numeral 18 ′ for convenience) located on the fulcrum side of the fulcrum member 5 has a larger diameter than the other wheel 18. In this case, as the traveling direction of the rotary blade 7 with respect to the ground, the front side in the traveling direction with respect to the ground, that is, the front side in the traveling direction contracts as it progresses, as indicated by reference numeral P1 ′ in the figure. The installation angle of the rotary blade 7 capable of forming a hole having a diameter wall surface is set.
[0035]
In such a configuration, the shape of the hole to be cut according to the inclination angle of the base 3 is a columnar shape as shown in FIG. 5 and a case where the shape is a tapered shape as shown in FIG. You can choose.
In the case of forming the tapered hole shown in FIG. 6, one of the wheels 18 'is replaced with one having a larger diameter than the other.
Although not shown, the inclination angle of the base 3 is identified by a level or the like. It should be noted that, instead of the level, a weight and an angle display plate that are suspended from the operating handle 2 by a string or the like are provided, and the inclination angle is identified by the position of the string on the angle display plate with respect to the hanging direction. May be.
When the tapered hole shown in FIG. 6 is formed, the wall surface of the formed hole is an inclined surface, in particular, the diameter is reduced as it becomes deeper. A receiving surface for receiving the surface layer portion can be configured. Thereby, since it can prevent that a surface layer part slides down in the ground, it becomes possible to suppress depression of a road surface.
[0036]
In FIG. 5, the base 3 and the fulcrum support member 4 are hinged and provided so as to be able to rise and fall.
That is, the fulcrum support member 4 is supported by the hinge 19 so as to be able to be tilted with respect to the base 3, and can be tilted at the time of cutting work, and can also be shown by a two-dot chain line in FIG. As shown, it can be folded toward the base 3 side by raising. Thereby, when it folds toward the base 3 side, the fulcrum support member 4 does not protrude sideways, so that it does not get in the way during transportation.
[0037]
In FIG. 5, another exhaust member 20 is connected to the suction opening member 10 covering the space above the rotary blade 7 in addition to the hose 11, and one opening of the exhaust member 20 is a cutting drive source. The electric motor 8 is located near the heat radiation window 8 </ b> A, and the other is located outside the suction opening member 10.
In this configuration, when a turbulent flow is generated in the suction opening member 10 due to the exhaust from the electric motor 8, the exhaust that causes the turbulent flow can be discharged to the outside. Thereby, it is possible to prevent the cutting powder generated from the cutting position from reaching the hose 11 when the turbulent flow is generated in the suction opening member 10. As a result, the cutting powder can be repaired to both schools, so that the cutting powder can be reliably prevented from leaking from the suction opening member 10 to the outside.
[0038]
【The invention's effect】
According to the present invention, when the rotary blade moves on the radius centered on the fulcrum member, the rotary blade has a straight blade surface in a section along the rotation axis, and the blade surface serves as a fulcrum as a side surface. A frustoconical shape that bulges outward is mounted on the cutting drive source so that the paved surface is cut by the blade surface, and cutting blades are provided on both the front and back surfaces and the peripheral surface of the rotary blade. since it has, as shown in FIG. 2 (B), will be the resultant force G of the resistance force P from soil acting on the force F1 and the blade surface of the moving direction along the inclination direction of the blade surface, the rotary blade Can be carried out smoothly. This makes it possible to perform a quick cutting operation by a simple operation regardless of the diameter of the round hole to be cut and without requiring a large facility . In addition, the angle of the rotary blade is adjusted to an angle according to the cutting radius and lowered so as to enter the pavement surface, and the swollen surface of the rotary blade is used by a simple operation of moving the base in the traveling direction. Cutting can be performed by moving the rotary blade in the circumferential direction drawn by the radius of rotation.
[Brief description of the drawings]
FIG. 1 is a schematic diagram for explaining a configuration of a cutting device according to an embodiment of the present invention, where FIG. 1 (A) is a diagram showing the whole, and FIG. 1 (B) is a diagram of a portion indicated by reference numeral (B) in FIG. It is a top view.
2A and 2B are diagrams showing a configuration of a rotary blade used in the cutting apparatus shown in FIG. 1, FIG. 2A is a perspective view, and FIG. 2B is a plan view.
FIG. 3 is an end view of the rotary blade shown in FIG. 2;
FIG. 4 is a schematic diagram for explaining a rotation direction of a rotary blade.
FIG. 5 is a diagram for explaining a partial modification of the configuration shown in FIG. 1;
6 is a diagram for explaining an aspect of the configuration shown in FIG. 5. FIG.
FIG. 7 is a diagram for explaining one conventional example of a paving surface cutting method.
FIG. 8 is a diagram for explaining one of the procedures in the construction method shown in FIG.
FIG. 9 is a diagram showing another example of a conventional example of a paving surface cutting method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cutting device 2 Operation handle 3 Base 4 Support point support member 4A Support hole 5 Support point member 6 Cutting drive source support member 7 Rotary blades 7A and 7B Cutting surface 8 Electric motor 18 which is a drive source for cutting Wheel 18 ' Different wheels R, R1 Radius F from the fulcrum position to the cutting blade Traveling direction C Rotating blade rotation direction P1 Wall surface perpendicular to the ground P2 Wall with a tapered shape with respect to the ground

Claims (3)

A fulcrum member that is fixed at an arbitrary position on the pavement surface and serves as a fulcrum, and the fulcrum member is provided at the end in the extending direction, and the end opposite the end is drawn with a radius centered on the fulcrum member A base that is movable on the circumference, a cutting drive source support member that can be tilted with respect to the base, and a cutting drive source that is integrated with the cutting drive source support member And a rotary blade that is rotationally driven by the cutting drive source, and the rotary blade has a linear blade surface in a cross section along the rotation axis, and the blade surface serves as a side surface with respect to the fulcrum. Cutting that has a truncated cone shape that bulges outward, is mounted on the cutting drive source so as to cut the pavement surface by the blade surface, and has cutting blades on both the front and back surfaces and the peripheral surface of the rotary blade. A cutting method using an apparatus,
The base was installed at a cutting target location, the fulcrum member was inserted into the fulcrum position at the cutting target location to define the cutting center, and the rotary blade was adjusted to an angle corresponding to the cutting radius with respect to the base. Then, the rotary blade is moved down into the pavement surface and moved in a direction to advance around the fulcrum position, thereby cutting in the circumferential direction according to the cutting radius centered on the fulcrum position. A pavement cutting method characterized by   The cutting method according to claim 1, wherein the base is detachably provided with a rollable wheel, and at the time of changing the inclination angle of the rotary blade, among the wheels equipped on the base, One of the case where the diameter of one of the width directions orthogonal to the rotational movement direction around the fulcrum member is changed with respect to the other and the case where the cutting drive source support member is tilted is selected. A cutting method characterized by causing the rotary blade to enter the pavement surface.   3. The cutting method according to claim 2, wherein the rotary blade enters in a direction in which a hole perpendicular to the ground can be formed in a cross section by a setting of the inclination angle and a hole whose diameter is reduced in a forward direction with respect to the ground. Cutting method characterized in that either direction can be selected.

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