JP3036033U - Wheel for road groove cutting - Google Patents

Abstract

(57) [PROBLEMS] To provide a road surface groove cutting wheel having a smooth groove bottom portion and capable of performing groove forming work with high work efficiency and low cost. An annular groove 64 of a road surface groove cutting wheel 10
When the cutting liquid is supplied into the cutting teeth 42, the cutting liquid is positively supplied between the cutting teeth 42 through the through holes 64 according to the centrifugal force, so that the road surface 26 made of concrete or asphalt is efficiently removed by cutting. Thus, a groove 28 having a sectional shape substantially similar to the sectional shape of the annular outer peripheral portion 44 is formed on the road surface 26. Further, the bottom of the groove 28 formed in this way is smooth as compared with the chipping work and cracks are not formed, so that water does not enter the road.
For this reason, the chipping work, the chipping scrap removal work, and the waterproof paint application work are unnecessary, so that the groove forming work can be performed with high work efficiency and low cost.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a road surface groove cutting wheel that cuts a road surface to form a predetermined groove on the road surface.

[0002]

[Prior art]

 For example, in order to prevent slippage of the road surface due to freezing of water on the road surface, it is necessary to provide a drainage groove with a predetermined depth on the road surface such as an expressway in order to positively remove molten water or rainwater. Such a groove has a relatively shallow depth that does not reduce the strength of concrete or asphalt road, for example, a depth of about 5 cm, and corresponds to the groove on the road surface after the road is completed. It is formed by deleting parts.

Conventionally, two vertical cutting lines having an interval corresponding to the width of a groove to be formed on a road surface are formed by using a diamond cutter only for the depth of the groove to be formed. In the meantime, the chipping was done by hammering, and the resulting chippings were removed, the inside of the groove was washed, and the bottom part was coated with waterproof paint to ensure the waterproofness of the bottom part. .

[0004]

[Issues to be solved by the invention]

 By the way, the above-mentioned conventional road surface groove forming work requires vertical cutting work, peeling work, peeling debris removal work, and waterproof paint application work, and thus has the drawback of a long work period and high operating costs. It was In addition, since the unevenness is formed at the bottom of the groove by the chipping work, the flow of water is not smooth and the accumulation due to catching of dust easily occurs.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a road surface which has a smooth bottom portion of a groove and which can perform groove forming work with high work efficiency and low cost. To provide a groove cutting wheel.

[0006]

[Means for Solving the Problems]

 The gist of the present invention for achieving the above object is to be fixed to a rotary shaft of a work vehicle that moves on a road surface and to be driven to rotate around a horizontal axis so that the road surface has a predetermined depth. A road surface groove cutting wheel for cutting the groove of (a) an annular outer peripheral portion having a cross-sectional shape of a predetermined width substantially similar to the cross-sectional shape of the groove, and being provided inside the annular outer peripheral portion, A wheel-shaped main body having a disk-shaped inner peripheral portion having a smaller thickness dimension in the direction of the rotation axis than the annular outer peripheral portion, and being fixed to the rotation shaft, and (b) containing abrasive grains. A plurality of cutting teeth which are continuous from one side of the outer peripheral surface of the outer peripheral surface to the other side and are arranged so as to protrude at a predetermined height in the circumferential direction at a predetermined height; and (c) the annular outer peripheral portion of the main body. Is formed so as to penetrate in the radial direction at the outer peripheral surface of the annular outer peripheral portion of the cutting tooth. A plurality of through holes that are open to the inner peripheral surface of the annular outer peripheral portion, and (d) the through holes that are provided so as to rise from both sides in the rotational axis direction of the annular outer peripheral portion toward the inner peripheral side and open to the inner peripheral surface of the annular outer peripheral portion. An inwardly facing flange forming an annular groove communicating with the hole.

[0007]

[Effect of the invention]

 With this arrangement, when the cutting fluid is supplied into the annular groove formed by the disc-shaped inner and outer peripheral portions of the main body and the inward flange, the cutting fluid is centrifugally cut through the through holes according to centrifugal force. Since it is positively supplied between the teeth, the road surface made of concrete or asphalt is efficiently removed by cutting, and a groove with a cross-sectional shape similar to the cross-sectional shape of the annular outer peripheral portion is formed on the road surface. . In addition, the bottom of the groove formed in this way is smoother than the chipping work and no cracks are formed, so that water does not enter the road. Therefore, the chipping work, the chipping removal work, and the waterproof paint application work are unnecessary, so that the groove forming work can be performed with high work efficiency and low cost. Further, since the bottom of the groove is smooth as compared with the chipping work, the flow of water is smooth, and the trapping of dust, which causes the accumulation of dust, is preferably suppressed.

[0008]

[Other aspects of the invention]

 Here, it is preferable that the annular outer peripheral portion has a substantially semicircular cross-sectional shape. By doing so, there is an advantage that a groove having a semi-circular bottom portion where dust is hard to collect, that is, a groove having a U-shaped cross section is formed at a corner.

Also, preferably, the annular outer peripheral portion has a substantially rectangular cross-sectional shape. This has the advantage of forming a groove having a rectangular cross-section with the largest cross-sectional area among the grooves having the same width and depth.

[0012] Preferably, the plurality of cutting teeth are formed so as to be continuous in a direction oblique to the width direction of the outer peripheral surface of the annular outer peripheral portion. In this way, the impact of the cutting teeth on the road surface is mitigated, vibration during cutting work is reduced, and the durability of the road groove cutting wheel is enhanced.

[0012] Preferably, the plurality of cutting teeth are formed by bonding diamond grains functioning as abrasive grains by a metallic bond. In this way, since the diamond particles having the highest hardness are used as the abrasive particles, the replacement period of the road surface groove cutting wheel becomes long and the work efficiency is further enhanced.

[0012] Preferably, the through hole is opened in the outer peripheral surface of the annular outer peripheral portion of the main body at intervals between the plurality of cutting teeth. With this configuration, the cutting fluid is positively supplied from the through holes that are opened between the plurality of cutting teeth on the outer peripheral surface of the annular outer peripheral portion of the main body, so that the durability of the road surface groove cutting wheel is further improved. There is an advantage that can be enhanced.

[0013] Preferably, the through holes are opened one by one between the plurality of cutting teeth on the outer peripheral surface of the annular outer peripheral portion of the main body, and the inward flange is the annular outer peripheral portion. Is formed so as to rise from both sides in the direction of the rotation axis toward the inner peripheral side, and forms a pair of annular grooves that communicate with the through holes that open in pairs on the inner peripheral surface of the annular outer peripheral portion. . In this way, annular grooves are formed on both sides of the main body, and the cutting fluid in these annular grooves is supplied through a pair of through holes, so even if the groove width is large, the durability of the road surface groove cutting wheel is improved. There is an advantage that

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view illustrating the configuration of a self-propelled road surface groove cutting device 12 to which a road surface groove cutting wheel 10 of the present invention is applied.

In FIG. 1, the road surface groove cutting device 12 includes a box-shaped vehicle body 18 supported by a pair of driving wheels, that is, a rear wheel 14 and a pair of front wheels 16. The rear wheel 14 is operatively connected to an engine (not shown) provided in the vehicle body 18 through a transmission, and the front wheel 16 is operated by rotating the vertical handle 20. The vehicle body 18 is supported via a vertical mechanism (not shown).

The front portion of the vehicle body 18 is rotatably supported around a horizontal axis of rotation that is orthogonal to the forward direction of the vehicle body 18 and is rotationally driven through the engine and a transmission belt. A rotating shaft 22 is provided. As shown in detail in FIG. 2, a road surface groove cutting wheel 10 for cutting a road surface 26 of a road 24 to form a groove 28 is fixed to the shaft end of the rotary shaft 22. The vertical handle 20 is for adjusting the cutting depth of the road surface groove cutting wheel 10, that is, the depth of the groove 28 by changing the vertical position of the front wheel 16 with respect to the vehicle body 18 by the rotation operation thereof.

An arm 34 having a pointer 30 and a roller 32 at its tip is provided at the front of the vehicle body 18 so as to be rotatable around a horizontal axis. When cutting the groove 28, when the vehicle body 18 moves forward, the arm 34 is tilted forward until the roller 32 at the tip thereof comes into contact with the road surface 26 to support the arm 34. Therefore, when the operator moves the vehicle body 18 forward in a direction in which the target line previously attached to the road surface 26 and the pointer 30 match, the groove 28 is formed along the target line. Has become.

In FIG. 2, a road surface groove cutting wheel 10 has a diameter of, for example, about 25 to 30 cm, and is made of steel or aluminum alloy and has a wheel body 40 having a high rigidity and a wheel shape. The outer peripheral surface of the wheel body 40 is provided with a plurality of cutting teeth 42 arranged at equal intervals in the circumferential direction. The wheel body 40 includes an annular outer peripheral portion 44 having a sectional shape of a predetermined width, for example, about 5 cm, which is substantially the same as the sectional shape (rectangular shape in this embodiment) of the groove 28 to be cut, and the inside of the annular outer peripheral portion 44. And a disc-shaped inner peripheral portion 46 which is provided on the outer peripheral portion 44 and has a smaller thickness dimension in the rotational axis direction than the annular outer peripheral portion 44, and is fixed to the rotary shaft 22. A center hole 48 and an engagement hole 50 are formed in the disc-shaped inner peripheral portion 46, while a center protrusion 52 that fits into the center hole 48 and an engagement pin that fits into the engagement hole 50. A mounting flange 56 having 54 is fixed to the shaft end of the rotary shaft 22, and when a bolt 58 is screwed into the central protrusion 52, the road groove cutting wheel 10 is fastened via a washer 59. It is like this.

The cutting teeth 42 include abrasive grains composed of diamond grains with a predetermined density or concentration, and are continuous in the annular outer peripheral portion 44 of the wheel body 40 from one side of the outer peripheral surface to the other side and in the circumferential direction. It is arranged so as to project at a predetermined interval at a predetermined height. The cutting teeth 42 are made of a metal bond such as a copper-tin alloy or nickel, and the diamond grains are bonded into the metal by a well-known method such as sintering or electrodeposition. It is constructed integrally with the outer peripheral surface. The plurality of cutting teeth 42 of the present embodiment are formed so as to be continuous in a direction oblique to the width direction of the outer peripheral surface of the annular outer peripheral portion 44, that is, a direction parallel to the rotation axis by about 10 to 30 °. .

A plurality of through holes 60 are formed in the annular outer peripheral portion 44 of the wheel body 40 so as to penetrate through the annular outer peripheral portion 44 in the radial direction and to be opened in pairs between the cutting teeth 42 on the outer peripheral surface of the annular outer peripheral portion 44. Has been done. Then, a pair of inward flanges 62 parallel to the disc-shaped inner peripheral portion 46 are raised by the machine screws 63 so as to rise from the both sides of the annular outer peripheral portion 44 in the rotational axis direction toward the inner peripheral side. By being fixed to the side portion of the portion 44, a pair of U-shaped annular grooves 64 are formed on the inner peripheral surface of the annular outer peripheral portion 44, which communicate with the pair of through holes 60 and open inward. ing.

The road groove cutting wheel 10 fixed to the shaft end of the rotary shaft 22 is covered with a wheel cover 66 (not shown in FIG. 1) fixed to the vehicle body 18, and is indicated by an arrow in FIG. As described above, a sufficient amount of cutting fluid such as water is jetted or discharged from the pair of nozzle pipes 68 fixed in the wheel cover 66 into the pair of annular grooves 64. There is.

When forming the groove 28 on the road surface 26 by using the self-propelled road surface groove cutting device 12 including the road surface groove cutting wheel 10 configured as described above, the road surface 26 is formed by starting an engine (not shown). Since the groove cutting wheel 10 is rotationally driven at a speed of, for example, about 2600 to 2800 rpm, and the cutting fluid pumped from a pump (not shown) driven by the engine is discharged into the pair of annular grooves 64. A large amount of the cutting fluid is supplied between the cutting teeth 42 through the through holes 60 according to the centrifugal force. In this state, by rotating the vertical handle 20, the cutting depth of the road surface groove cutting wheel 10, that is, the depth of the groove 28 is set to, for example, about 5 cm, and then the forward lever (not shown) is operated. Thus, when the vehicle body 18 is advanced so that the pointer 30 follows the target line previously attached to the road surface 26, the road surface 26 of the road 24 is cut by the road groove cutting wheel 10, and the road surface groove is cut. A groove 28 having a sectional shape similar to the sectional shape of the outer peripheral portion of the cutting wheel 10 is continuously formed along the target line.

During the cutting in which the upper layer of the road 24 made of concrete or asphalt is scraped off by the plurality of cutting teeth 42, the cutting liquid is passed through the through hole 60 opening on the outer peripheral surface of the annular outer peripheral portion 44. Since it is positively supplied between the cutting teeth 42, the tips of the cutting teeth 42 are cooled and the cutting waste is suitably removed. As a result, the road surface groove cutting in which the through hole 60 and the annular groove 64 are not formed is performed. Compared with the case where the cutting wheel is used to supply the cutting fluid from the surroundings, when the load is applied for the same service life, the cutting work can be performed three times more efficiently.

As described above, according to the road surface groove cutting wheel 10 of the present embodiment, the annular groove 64 formed by the disc-shaped inner peripheral portion 46 and the annular outer peripheral portion 44 of the wheel body 40 and the inward flange 62. When the cutting fluid is supplied into the cutting teeth 42, the cutting fluid is positively supplied between the cutting teeth 42 through the through holes 64 according to the centrifugal force. Therefore, the road surface 26 made of concrete or asphalt is efficiently removed by cutting. Thus, a groove 28 having a cross-sectional shape substantially similar to the cross-sectional shape of the annular outer peripheral portion 44 is formed on the road surface 26. Further, since the bottom of the groove 28 formed in this way is smooth as compared with the chipping work and no crack is formed, water does not enter the road. Therefore, it is possible to perform the groove forming work with high work efficiency and low cost, since the removing work, the removing work of the removing dust and the work of applying the waterproof paint are unnecessary. Further, since the bottom of the groove 28 is smoother than the chipping work, the flow of water is smooth and the trapping of dust, which causes dust accumulation, is preferably suppressed.

Further, according to the road surface groove cutting wheel 10 of the present embodiment, the work of cutting the groove 28 can be executed with high efficiency, so that the work can be carried out quickly in the concentrated construction of the expressway, which has a short construction period. Can be performed in a short period of time, or a small number of grooving operations can be performed within a fixed construction period, which further enhances construction safety in a relatively limited and narrow site.

Further, in the road surface groove cutting wheel 10 of the present embodiment, since the annular outer peripheral portion 44 has a substantially rectangular cross-sectional shape, it is the most cut out among the grooves having the same width dimension and depth. There is an advantage that the groove 28 having a rectangular cross section having a large area is formed.

Further, in the road surface groove cutting wheel 10 of the present embodiment, the plurality of cutting teeth 42 are 10 to 30 ° with respect to the width direction of the outer peripheral surface of the annular outer peripheral portion 44, that is, the direction parallel to the rotation axis. Since the cutting teeth 42 are formed so as to be connected to each other in an oblique direction, the impact at the time of the collision of the cutting teeth 42 with the road surface 26 is mitigated, so that the vibration during cutting work is reduced and the road groove cutting wheel 10 is reduced. The durability of is further enhanced.

Further, in the road surface groove cutting wheel 10 of the present embodiment, the plurality of cutting teeth 42 are configured by bonding diamond grains functioning as abrasive grains by a metallic bond. Since the diamond grain having the highest hardness is used as the abrasive grain, the replacement period of the road surface groove cutting wheel 10 becomes long, and the work efficiency is further enhanced.

Further, since the through hole 60 of the road surface groove cutting wheel 10 of the present embodiment is opened in the outer peripheral surface of the annular outer peripheral portion 44 of the wheel body 40 at intervals between the plurality of cutting teeth 42. Since the cutting fluid is positively supplied from the through holes 60 that are opened between the plurality of cutting teeth 42 on the outer peripheral surface of the annular outer peripheral portion 44 of the wheel body 40, the durability of the road surface groove cutting wheel 10 is further improved. There is an advantage that can be enhanced.

Further, the through holes 60 of the road surface groove cutting wheel 10 of the present embodiment are for opening a pair between the plurality of cutting teeth 42 on the outer peripheral surface of the annular outer peripheral portion 44 of the wheel body 40, The inward flanges 62 are provided so as to rise from both sides in the direction of the rotation axis of the annular outer peripheral portion 44 toward the inner peripheral side, and are respectively formed in the through holes 60 that are opened in pairs on the inner peripheral surface of the annular outer peripheral portion 44. Since the pair of annular grooves 64 that communicate with each other is formed, the annular grooves 64 are formed on both sides of the wheel body 40, and the cutting fluid in the annular grooves 64 is supplied through the pair of through holes 60. Even if the width is large, there is an advantage that the durability of the road surface groove cutting wheel 10 is further enhanced.

Next, another embodiment of the present invention will be described. In the following description, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted.

FIG. 3 and FIG. 4 show a fragmentary sectional view and a front view of a road groove cutting wheel 70 for forming a groove having a U-shaped cross section, in which a part thereof is cut away. In this road surface groove cutting wheel 70, the cross section of the outer peripheral portion of the wheel body 40, that is, the annular outer peripheral portion 44, and the cutting teeth 42 formed on the outer peripheral surface thereof are formed in a substantially semicircular U-shape. The configuration is similar to that of the above-described embodiment. Also in the road surface groove cutting wheel 70 of the present embodiment, the same effects as those of the above-described embodiments can be obtained, and the annular outer peripheral portion 44 has a substantially semicircular cross-sectional shape, so that the inner wall surface There is an advantage that a groove having a semicircular bottom portion where dust is hard to collect at the corner, that is, a groove having a U-shaped cross section is formed.

FIG. 5 also shows a front view in which a part of a road surface groove cutting wheel 80 for forming a groove having a U-shaped cross section is cut away. This road groove cutting wheel 80 has a cross section of an outer peripheral portion of the wheel body 40, that is, an annular outer peripheral portion 44, and cutting teeth 42 formed on the outer peripheral surface thereof, which are formed in a substantially semicircular U-shape. The teeth 42 are formed in the same manner as in the above-described embodiment except that the teeth 42 are formed so as to be inclined by about 10 to 30 ° with respect to the width direction of the outer peripheral surface of the annular outer peripheral portion 44, that is, the direction parallel to the rotation axis. ing. Also in the road surface groove cutting wheel 70 of the present embodiment, the same effect as that of the above-described embodiment is obtained, and the annular outer peripheral portion 44 has a substantially semicircular cross-sectional shape. A groove with a semi-circular bottom that does not easily collect dust, that is, a groove with a U-shaped cross section, is formed at the corner of the wall surface, and the impact when the cutting tooth 42 collides with the road surface 26 is mitigated. Vibration during work is reduced, and the durability of the road groove cutting wheel 10 is further enhanced.

Although one embodiment of the present invention has been described above with reference to the drawings, the present invention can be applied to other aspects.

For example, although the road surface groove cutting wheels 10, 70, 80 of the above-described embodiment are provided with the pair of annular grooves 64 on both sides of the disc-shaped inner peripheral portion 46, only one side of the annular groove 64 is provided. Even if it is equipped with, a temporary effect can be obtained.

Further, although the cutting teeth 42 of the above-described embodiment are formed so as to be continuous from one side to the other side over the entire width of the outer peripheral surface of the annular outer peripheral portion 44, they are not necessarily continuous over the entire width. For example, the cutting teeth connected from one side of the outer peripheral surface to the center of the entire width and the cutting teeth connected from the other side to the center of the entire width may be alternately provided in the circumferential direction.

Further, the cutting teeth 42 of the above-described embodiment are integrally formed on the outer peripheral surface of the annular outer peripheral portion 44, but, for example, a diamond segment grindstone or a diamond grindstone chip is formed on the outer peripheral surface of the annular outer peripheral portion 44. It does not matter if it is formed by being adhered to. The cutting teeth 42 may include other types of abrasive grains such as CBN abrasive grains.

Further, although the through holes 60 of the above-described embodiment are provided so as to be opened at intervals between the cutting teeth 42 on the outer peripheral surface of the annular outer peripheral portion 44, they are opened every other one or two. Alternatively, two or more openings may be provided between the cutting teeth 42 on the outer peripheral surface of the annular outer peripheral portion 44.

Further, although the inward flange 62 of the above-described embodiment is attached by the machine screw 63, it may be formed integrally with the annular outer peripheral portion 44.

In addition, the present invention can be modified in various ways without departing from the spirit of the invention.

[Brief description of the drawings]

FIG. 1 is a front view showing the outer appearance of a road surface groove cutting device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway view illustrating a configuration of a road surface groove cutting wheel attached to the road surface groove cutting device of the embodiment of FIG.

FIG. 3 is a sectional view of an essential part for explaining the configuration of a road surface groove cutting wheel according to another embodiment of the present invention.

FIG. 4 is a partially cutaway front view showing a main part of the road surface groove cutting wheel of FIG. 3.

FIG. 5 is a view corresponding to FIG. 4 for explaining the configuration of a road surface groove cutting wheel according to another embodiment of the present invention.

[Description of sign]

 10: Wheel for road groove cutting 12: Road groove cutting device 14: Rear wheel, 16: Front wheel, 18: Car body (work vehicle) 22: Rotating shaft 26: Road surface 28: Groove 40: Wheel body 44: Annular outer peripheral portion 46: Disc-shaped inner peripheral portion 60: Through hole 62: Inward flange 64: Annular groove

Claims (7)

[Utility model registration claims] 1. A road surface groove cutting wheel for cutting a groove having a predetermined depth on a road surface by being fixed to a rotary shaft of a work vehicle moving on the road surface and being driven to rotate about a horizontal axis. And an annular outer peripheral portion having a sectional shape of a predetermined width substantially similar to the sectional shape of the groove, and a disc provided inside the annular outer peripheral portion and having a smaller thickness dimension in the rotational axis direction than the annular outer peripheral portion. A wheel-shaped main body that is fixed to the rotating shaft, and includes abrasive grains, and is continuous from one side of the outer peripheral surface of the annular outer peripheral portion of the main body to the other side and in the circumferential direction. A plurality of cutting teeth arranged so as to project at a predetermined height at predetermined intervals, and a plurality of cutting teeth radially formed in the annular outer peripheral portion of the main body, and between the cutting teeth on the outer peripheral surface of the annular outer peripheral portion. A plurality of through holes that open in the A road surface, which is provided so as to rise from one side toward the inner peripheral side and which forms an annular groove that communicates with the through hole that opens to the inner peripheral surface of the annular outer peripheral portion. Groove cutting wheel. 2. The road groove cutting wheel according to claim 1, wherein the annular outer peripheral portion has a substantially semicircular cross-sectional shape. 3. The road groove cutting wheel according to claim 1, wherein the annular outer peripheral portion has a substantially rectangular cross-sectional shape. 4. The road surface groove cutting according to claim 1, wherein the plurality of cutting teeth are formed so as to be continuous in a direction oblique to the width direction of the outer peripheral surface of the annular outer peripheral portion. Wheel. 5. The road surface groove cutting wheel according to claim 1, wherein the plurality of cutting teeth are formed by bonding diamond grains functioning as abrasive grains by a metallic bond. 6. The road surface groove cutting wheel according to claim 1, wherein the through hole is opened in the outer peripheral surface of the annular outer peripheral portion of the main body at intervals between the plurality of cutting teeth. 7. The through holes are formed in pairs on the outer peripheral surface of the annular outer peripheral portion of the main body between the plurality of cutting teeth, and the inward flange is in a rotation axis direction of the annular outer peripheral portion. 7. A pair of annular grooves, which are provided so as to rise from both sides of the inner peripheral side toward the inner peripheral side and communicate with the through holes that are opened in pairs on the inner peripheral surface of the annular outer peripheral portion, respectively. Wheel for cutting any road surface groove.