JP3419693B2 - Cutting equipment and machines for pavement surfaces around manholes - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cutting device and a cutting machine for a paved surface around a manhole.

[0002]

2. Description of the Related Art A conventional cutting machine for cutting a pavement on a road has a pavement cutting device attached to the end of an articulated arm of a hydraulic working machine such as a hydraulic excavator to operate, turn, and run the articulated arm. With this, the pavement surface is cut while moving the cutting device. Among such cutting machines for paving surfaces, for example, Japanese Patent Application Laid-Open No. 9-291509 discloses a cutting machine in which an end mill rotated by a motor is attached to a bracket attached to the tip of an articulated arm.

[0003]

As described above, in order to perform cutting of the pavement surface around the manhole with a cutting device such as an end mill attached to the end of the articulated arm of the working machine through the bracket, Since it is necessary to control the position of the cutting device by turning, traveling, and operating the articulated arm of the work machine, there is a problem of inefficiency.

SUMMARY OF THE INVENTION In view of the above problems of the prior art, it is an object of the present invention to provide a cutting device and a cutting machine capable of efficiently cutting a pavement surface around a manhole.

[0005]

[Means for Solving the Problems]

According to a first aspect of the present invention, there is provided a cutting device for cutting a pavement surface around a manhole, which is attached to a tip of an arm of a hydraulic working machine to cut a pavement surface around a manhole, and is attached to a tip of the arm. A bracket, a swivel device provided on the bracket, an end mill projecting downwardly from the swivel body and a drive device for rotating the end mill, and a swivel device below the swivel center of the swivel body.
And the manhole or
A guide part fixed to the lid and engaging with the swivel shaft
And a guide body having the same.

In the cutting device thus constructed,
By operating the arm of the hydraulic work machine, the turning center of the cutting device is set to the center of the manhole, and the guide body is set to the manhole.
Alternatively, it is fixed to the lid and is attached to the guide part of the guide body.
Engage the swivel shaft of the cutting device, rotate the end mill by the end mill drive device, and deepen the cutting depth of the end mill by operating the arm.After cutting to a predetermined depth, operate the swivel device to move the end mill. Cutting while revolving and rotating. It is also possible to perform the revolving movement of the end mill while revolving the end mill, gradually increasing the cutting depth, and cutting to a predetermined depth.

A cutting device for a paved surface around a manhole according to a second aspect of the present invention is mounted on a tip of an arm of a hydraulic working machine.
A device for cutting the pavement surface around the
Bracket attached to the tip of the arm and the bracket
A turning device provided, downward pivoting of the pivoting device
End mill projectingly attached to the end and the end mill
A guide body having a drive device for rotating the rotating body, a swivel shaft provided so as to project below the swivel center of the swivel body of the swivel device, and a guide portion fixed to the manhole or its lid and engaging the swivel shaft. When, characterized in that a means for changing the depth of engagement of the pivot axis with respect to the guide portion.

As described above, the cutting depth of the end mill can be changed by changing the engagement depth of the swivel shaft with respect to the guide portion.

The cutting device for the pavement surface around the manhole according to claim 3 is mounted on the tip of the arm of the hydraulic working machine and mounted on the manhole.
A device for cutting the pavement surface around the
Bracket attached to the tip of the arm and the bracket
A turning device provided, downward pivoting of the pivoting device
End mill projectingly attached to the end and the end mill
A driving device for rotating the swivel body vertical position adjustably mounted relative to the axis of the pivot, and is characterized in that a drive device for vertically moving the revolving body.

As described above, by making the revolving structure vertically movable with respect to the shaft, the cutting depth by the end mill can be changed.

According to a fourth aspect of the present invention, there is provided a cutting device for cutting a pavement surface around a manhole according to any one of the first to third aspects, wherein the end mill and its driving device are capable of changing a position of the revolving structure in a turning radius direction. It is characterized in that it is equipped with a drive device for changing the turning radius.

As described above, since the turning radius of the end mill can be changed and the drive unit for changing the turning radius is provided, the revolution radius of the end mill can be changed and cutting can be performed over a wide range. be able to.

A cutting device for a pavement surface around a manhole according to a fifth aspect is the cutting device according to any one of the first to fourth aspects, in which the end mill and its driving device are attached to a revolving structure so as to be adjustable in vertical position. It is characterized in that a drive device for vertical movement is provided.

As described above, the cutting depth of the end mill can be changed by moving the end mill and its driving device up and down.

A cutting device for a pavement surface around a manhole according to a sixth aspect is a device for cutting a pavement surface around a manhole by being attached to the tip of an arm of a hydraulic working machine, and is attached to the tip of the arm. A bracket, a planetary gear device movably provided in the bracket in the front-rear and left-right directions, a swing shaft eccentrically attached to a central axis of a sun gear at the center of the planetary gear device, and a planetary gear of the planetary gear device. And a guide body fixed to the manhole or the lid thereof and having a guide portion that engages the swivel shaft, the end mill being eccentric about the swivel shaft and rotating and rotating. Characterized by cutting.

As described above, by adopting the planetary gear unit and the eccentric rotation mechanism, the revolution and rotation of the end mill can be performed by only one motor, and the end mill is eccentric with respect to the center of the manhole. An orbit can be drawn and revolved, and cutting can be performed in a wide range by repeating such orbit.

A cutting machine for cutting a pavement surface around a manhole according to claim 7 is a hydraulic working machine, a bracket attached to a tip of an arm of the hydraulic working machine, a turning device provided on the bracket, and the turning device. Of the revolving structure, which is mounted on the manhole or its lid, and a driving device for rotating the end mill, the driving device rotating the end mill, the revolving shaft projecting below the center of revolving structure of the revolving device. And a guide body having a guide portion that engages the turning shaft.

A cutting machine for a paved surface around a manhole according to claim 8 is a hydraulic working machine, a bracket attached to a tip of an arm of the hydraulic working machine, a turning device provided on the bracket, and the turning device. An end mill attached to the revolving body of the vehicle so as to project downward, and a drive device for rotating the end mill.
It is characterized in that it is mounted on the revolving structure such that the position thereof can be changed in the turning radius direction, and that a drive device for changing the turning radius is provided.

Cutting of the pavement surface around the manhole according to claim 9
The milling machine according to claim 7, wherein the end mill and its drive
The device can be repositioned on the revolving structure in the direction of the turning radius.
It is equipped with a drive device that changes the turning radius when mounted.
It is characterized by what you got .

According to the cutting machine of claim 7, it is possible to perform the cutting work by the cutting device of claim 1 . Also bill
According to the cutting machine of items 8 and 9, the cutting device of claim 4 is used.
Can perform cutting work.

[0022]

1 is a side view showing an embodiment of a cutting machine for cutting a pavement surface around a manhole according to the present invention, FIG. 2 is an enlarged side view of a main portion thereof, and FIG. 2 is a front view, and FIG. 4 is a plan view for explaining the cutting work by the cutting machine of the present embodiment . In FIG. 1, 10 is a hydraulic working machine including a hydraulic excavator, and 1 is a cutting device attached to the articulated arm 11. Hydraulic working machine 10
Is a wheel type traveling body 12 (may be a crawler type)
A revolving unit 14 is installed on the revolving unit 13 via a revolving unit 13, a cab 15 is installed on the revolving unit 14, and the multi-joint arm 11 is mounted.

The cutting device 1 is attached to the tip of the multi-joint arm 11.
Is mounted by a hydraulic cylinder 16 so that the angle can be adjusted. That is, the cutting device 1 is mounted on a bracket 2 to be attached to the tip of an arm 11, a revolving device 3 installed on the bracket 2, and a revolving unit 4 mounted on the revolving device 4 so that the position of the revolving device 3 can be adjusted in the radial direction. End mill 5 and its driving device 5a, and end mill 5 and its driving device 5a
And a hydraulic cylinder 6 as a driving device for moving the rotating device 3 in the radial direction of the turning device 3. Reference numeral 7 is a manhole, 8 is a lid thereof, and 9 is a paved surface around the manhole 7.

As shown in FIG. 2, the swivel device 3 installed on the bracket 2 includes a swivel motor 21 composed of a hydraulic motor or an electric motor, a fixed ring (outer ring) 22 fixed to the bracket 2, and a swivel motor 21. It consists of a rotating pinion 23 and a swivel wheel (inner ring) 24 having a gear that meshes with the pinion 23.

The revolving structure 4 is fixed to the lower surface of the revolving wheel 24. As shown in FIG. 3, the swivel body 4 has a gate-shaped cross-sectional shape, and has a structure long in the swivel radius direction of the swivel device 3. Guide rails 25 are provided on the inner walls on both sides of the revolving structure 4, and on both sides of the frame 26 of the drive device 5a of the end mill 5,
It has a protrusion 27 slidably fitted to the guide rail 25. The hydraulic cylinder 6 for moving the end mill 5 and its driving device 5a in the longitudinal direction of the revolving structure 4 is attached by connecting one end to the revolving structure 4 by a pin 29 and the other end to the frame 26 by a pin 30. To be

When the paving surface 9 around the manhole 7 is cut by using the cutting device 1 and the cutting machine, the cutting device 1 is operated by running the cutting machine, turning, and operating the articulated arm 3.
The turning center of the turning device 3 is aligned with the center of the manhole 7, the multi-joint arm 11 is operated to press the end mill 5 against the paving surface 9, and the driving device 5a is operated to cut the paving surface 9 to a predetermined depth. . Then, the turning device 3 is operated,
The end mill 5 is revolved while rotating, and the pavement surface 9 is concentrically cut. Then, operate the hydraulic cylinder 6,
Perform cutting by changing the cutting radius. By repeating such cutting work, as shown in the plan view of FIG. 4, the periphery of the manhole 7 is concentrically cut. In FIG. 4, a hatched portion 31 shows a cut region. In addition, as a cutting method, after cutting a portion adjacent to the outer periphery of the manhole 7,
The hydraulic cylinder 6 may be helically cut while extending. On the contrary, cutting may be performed by contracting the hydraulic cylinder 6 stepwise or continuously from the state where the hydraulic cylinder 6 is extended.

Thus, by cutting the circumference of the manhole 7 by a predetermined width while revolving and rotating the end mill 5, it is possible to perform cutting efficiently. In the present invention, it is also possible to attach a plurality of end mills 5 to the revolving structure 4 at positions having different turning radii and to perform cutting by rotating the plurality of end mills 5 while simultaneously driving the end mills 5. As described above, by configuring so that the revolution radius of the end mill 5 can be changed by a drive device such as the hydraulic cylinder 6, it is possible to perform cutting over a wide range with a small number of pieces. Moreover, since the number of end mills 5 can be reduced, cutting can be performed in a state where the cutting resistance is small. Further, since the cutting device 1 is attached to the multi-joint arm 11 of the hydraulic working machine 10, it is easy to move to the manhole and set the position, and the maneuverability is excellent.

FIG. 5 shows another embodiment of the cutting machine of the present invention.
FIG. 6 is a side view showing the same , FIG. 6 is an enlarged side view of the main part thereof, and FIG. In the present embodiment,
The guide body 33 is fixed to the center of the manhole 7 by fitting it into the opening, and the end mill 5 is revolved around the cylindrical guide portion 34 set at the center position of the manhole in the guide body 33 and rotated. While doing so, the pavement surface 9 around the manhole 7 is cut.

In order to perform such cutting, the revolving unit 4
A downwardly projecting swivel shaft 35 is provided at the swivel center, and the swivel shaft 35 is rotatably fitted to the guide portion 34. A stopper 36 for setting the cutting depth of the end mill 5 is attached to the swivel shaft 35. The stopper 36 is attached at different heights by a fixing pin 39 which is inserted into any of a plurality of pin holes 37 provided in the turning shaft 35,
It becomes possible to cut to a depth where the stopper 36 contacts the upper end of the guide portion 34.

For cutting, the lid 8 of the manhole 7 is removed, the guide body 33 is fitted in the manhole 7 opening instead, the swivel shaft 35 is fitted in the guide portion 34 of the guide body 33, and the fixing pin 39 is removed. When the turning device 3 is stopped and only the end mill 5 is rotated for cutting to reach the target depth, the fixing pin 39 is inserted into the corresponding pin hole 37 at the position of the stopper 36 at that time. By fixing, set the cutting depth. After that, the turning device 3 is actuated in the same manner as described above to cause the end mill 5 to revolve while being rotated by the drive device 5a for cutting, and the revolution radius may be cut concentrically or spirally by expanding and contracting the hydraulic cylinder 6. .

In this way, the guide portion 34 of the guide body 33 is
By engaging the swivel shaft 35 with the
As shown in FIG. 3, the diameter of the outer circumference of the manhole 7 can be extended from the diameter of 1 to the diameter of the end mill 5 which can be reached by the extension of the hydraulic cylinder 6. Can be done accurately without leaving any cutting residue. The stopper 36 may have a structure in which it is tightened and fixed at an arbitrary height by a bolt inserted into a vertically long hole provided in the turning shaft 35 and a nut screwed with the bolt.

FIG. 8A is an exploded perspective view showing another example of the guide body, and FIG. 8B is a vertical sectional view thereof. In this example, the guide body 33A is closed by fitting the protrusion 40 provided on the lower surface of the guide body 33A into the hole 8a of the lid 8.
It is fixed to. Even with such a structure, the turning center of the end mill 5 can be set at the center of the manhole 7.

FIG. 9 is a side view showing another embodiment of the cutting device of the present invention. In this example, in the guide portion 34 of the guide body 33 that is fitted and fixed to the opening of the manhole 7,
A swivel shaft 35 at the lower end of a cylindrical shaft 41 provided so as to project downward at the swivel center of the swivel body 4 of the swivel device 3 is fitted, and a cylindrical portion provided above and below the swivel body 4 is fitted to the shaft 41. 42 and 43 are vertically movably fitted to each other, and the head at the upper end of a hydraulic cylinder 44 for vertically moving the revolving unit 4 is connected to the shaft 41 by a pin 45.
The rod of the hydraulic cylinder 44 is connected to the cylindrical portion 43 provided on the revolving unit 4 by a pin 47 slidably penetrating a vertically elongated guide groove 46 provided on the shaft 41. Therefore, the revolving structure 4 revolves together with the shaft 41, and the hydraulic cylinder 44
The vertical movement of the end mill 5 allows the cutting depth of the end mill 5 to be changed and the setting of the cutting depth to be changed. If the drive device such as the hydraulic cylinder 44 is provided in this way, the free and fixing work of the stopper 36 and the like becomes unnecessary and the work becomes easy.

FIG. 10 (A) is a side view showing another embodiment of the cutting device of the present invention, and FIG. 10 (B) is a front view thereof. In the present embodiment, the frame 26 of the drive device 5a of the end mill 5 mounted movably in the longitudinal direction of the revolving structure 4, the outer frame 26a having the protrusions 27 engaged with the guide rails 25, and the drive device 5a. The inner frame 26b is mounted on the outer frame 25a so as to be movable up and down, and the hydraulic cylinder 50 as a drive device mounted between the outer frame 26a and the inner frame 26b expands and contracts to drive the inner frame 26b. The height of the end mill 5, that is, the cutting depth, can be changed together with the device 5a.

As described above, by making the end mill 5 vertically movable with respect to the revolving structure 4, the cutting depth can be changed. The cutting depth can be changed by providing either the vertical movement device for the revolving unit 4 in FIG. 9 or the end mill vertical movement device in FIG. In this case, a fixing device composed of the stopper 36 shown in FIG. 6 may be provided, and the stopper 36 fixes the pivot shaft 35 to the guide portion 34 so that the articulated arm 11 does not swing up and down during work. It is desirable to keep.

FIG. 11 (A) shows another embodiment of the cutting device according to the present invention, and is a longitudinal sectional view showing an example of a revolution rotating device of the end mill 5 using a planetary gear device.
(B) is a plan view showing the cutting locus. In the figure, 2 is a bracket attached to the articulated arm 11, 52 is a planetary gear device housing attached to the bracket 2, 53 is a motor fixed to the housing 52, and 54 is a motor.
Is a sun gear rotated by the motor 53, and 55 is a planetary gear that meshes with the sun gear 54 and the internal gear 56 of the housing 52.

The sun gear 54 at the center of the housing 52 has a swivel shaft 35 fitted to the guide portion 34 of the guide body 33.
And the end mill 5 is attached to at least one of the plurality of planetary gears 55.

In this structure, when the motor 52 is operated, the planetary gear 55 revolves while revolving.
As shown in FIG. 1 (B), the end mill 5 attached to the planetary gear 55 is operated by only one motor 53, and the rotary shaft 3 is rotated.
5 can be revolved around the locus 57 along the locus 57, and cutting can be performed within the range of the diameter of the end mill 5 shown by the shaded portion 31.

FIG. 12 (A) shows another example of the cutting device according to the present invention using a planetary gear device. By attaching the end mill 5 to the planetary gear 55 in an eccentric manner, FIG.
As shown in (B), since the end mill 5 revolves around the center O1 (center of the planetary gear) on the revolution orbit 57 (the center of the planetary gear) and revolves around the satellite orbit 59, it is wider than the example in FIG. Cutting can be performed in the range of 31.

FIG. 13A shows another example of the cutting device according to the present invention using a planetary gear device, in which the orbiting shaft 35 is eccentrically attached to the sun gear 54, and the space between the bracket 2 and the orbiting device 3 is provided. By interposing an XY table 61 that allows relative movement in all planar directions (front-rear, left-right directions), as shown in FIG.
Can be revolved by drawing an orbit 62 eccentric to the center of the guide portion 34, and by repeating such revolution, cutting can be performed in a wide range indicated by the shaded portion 31.

Further, as shown in FIG. 12, a structure in which the end mill 5 is eccentrically attached to the planetary gear 55, and FIG.
As shown in FIG. 3, by combining the structure in which the orbiting shaft 35 is eccentrically attached to the sun gear 54, a wider range of cutting can be performed. In the above embodiment, instead of using the pivot shaft 35 fitted to the guide portion 34, a permanent magnet or an electromagnet may be used to fix the center of the cutting device to the lid 8, the guide body 33, or the like. .

[0042]

Effects of the Invention] According to the cutting apparatus of claim 1, since the cutting apparatus is mounted on a hydraulic working machine, in which by rotating while revolving end mill cutting pavement surface around the manhole, be efficiently The paved surface around the manhole can be cut. Further, since the turning device is supported by the hydraulic working machine, it is highly maneuverable.

According to the cutting device of the first aspect , the guide body is fixed to the manhole or the lid thereof, and the swivel shaft of the cutting device is engaged with the guide portion of the guide body, and the swivel shaft is centered. Since the paving surface around the manhole can be cut by rotating it while revolving the end mill, it is possible to cut the circumference of the manhole, which is usually circular, into a circular shape. Cutting can be done along the manhole without damaging it.

According to the cutting device of the second aspect , since the swivel device is supported by the arm of the working machine via the bracket and has means for changing the engagement depth of the swivel shaft with respect to the guide portion, the end mill is used. The cutting depth can be variously changed depending on the situation.

According to the cutting device of the third aspect , the revolving device is supported by the arm of the working machine via the bracket, and the revolving structure is mounted so as to be vertically adjustable with respect to the axis of the revolving center. Since the driving device for moving the revolving structure up and down is provided, the cutting depth by the end mill can be variously changed by moving the revolving structure up and down with respect to the shaft.

According to the cutting device of the fourth aspect , the end mill and its driving device are mounted on the revolving structure so as to be positionally changeable in the turning radius direction, and provided with a driving device for changing the turning radius. As a result, the revolution radius of the end mill can be changed, and cutting can be performed over a wide range.

According to the cutting device of claim 5 , the end mill and its driving device are attached to the revolving structure so that the vertical position can be adjusted, and the driving device for vertical movement thereof is provided. It can be variously changed.

According to the cutting device of the sixth aspect , by adopting the planetary gear device and the eccentric rotation mechanism, the revolution of the end mill and the rotation of the end mill can be performed by only one motor, so that the drive device can be reduced. . Further, the end mill can draw an orbit that is eccentric to the center of the manhole and revolve, and by repeating such orbit, cutting can be performed in a wide range.

[0049] According to the cutting machine of claim 7, it is possible to increase the effect of claim 1. In addition, in claims 8 and 9
According to the cutting machine, the effect according to claim 4 can be obtained.
it can.

[Brief description of drawings]

FIG. 1 Cutting of a paved surface around a manhole according to the present invention.
It is a side view showing one embodiment of a machine .

FIG. 2 is an enlarged side view of a main part of FIG.

FIG. 3 is a front view of FIG.

FIG. 4 is a plan view illustrating the cutting device according to the present embodiment.

FIG. 5 is a side view showing another embodiment of the cutting machine of the present invention.

FIG. 6 is an enlarged side view of a main part of FIG.

FIG. 7 is a cross-sectional view showing a cutting state by the cutting device according to the embodiment of FIGS. 5 and 6;

8A is an exploded perspective view showing another example of a guide body used in the cutting device according to the present invention, and FIG. 8B is a vertical sectional view thereof.

FIG. 9 is a side view showing another embodiment of the cutting device of the present invention.

FIG. 10 is a side view showing another embodiment of the cutting device of the present invention.

11A is a vertical cross-sectional view showing another embodiment of the cutting device according to the present invention, and FIG. 11B is a plan view showing the cutting locus thereof.

FIG. 12 (A) is a vertical sectional view showing another embodiment of the cutting device according to the present invention, and FIG. 12 (B) is a plan view showing the cutting locus thereof.

13A is a vertical sectional view showing another embodiment of the cutting device according to the present invention, and FIG. 13B is a plan view showing the cutting locus thereof .

[Explanation of symbols]

1: cutting device, 2: bracket, 3: turning device, 4: turning body, 5: end mill, 5a: drive device, 6: hydraulic cylinder, 7: manhole, 8: lid, 9: paved surface, 10: hydraulic work Machine, 11: articulated arm, 25: guide rail,
26: frame, 27: ridge, 31: cutting area, 33:
Guide body, 34: guide portion, 35: turning shaft, 36: stopper, 37: pin hole, 39: fixing pin, 41: shaft, 4
2, 43: tubular part, 44: hydraulic cylinder, 50: hydraulic cylinder, 52: housing, 53: motor, 54: sun gear, 55: planetary gear

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Ohira 650 Jinrachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura factory (56) Reference JP-A-7-229158 (JP, A) JP-A-4 -231519 (JP, A) JP-A-9-291509 (JP, A) JP-A-8-134834 (JP, A) Utility model registration 3010384 (JP, U) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) E01C 23/09 E01C 23/08 E01C 23/12

Claims (9)

(57) [Claims] 1. Attach it to the end of the arm of the hydraulic work machine
A device for cutting the paved surface around the hole, A bracket attached to the tip of the arm, A turning device provided on the bracket, An engine mounted on the revolving structure of the revolving device so as to project downward.
And a drive device for rotating the end millWhen, Provided so as to project below the center of rotation of the revolving structure of the revolving device.
Swivel axis, It is fixed to the manhole or its lid and the swivel axis
And a guide body having a guide portion for engaging with That
A cutting device for the paved surface around the characteristic manhole. 2. A manipulator attached to the tip of an arm of a hydraulic working machine.
A device for cutting the paved surface around the hole, A bracket attached to the tip of the arm, A turning device provided on the bracket, An engine mounted on the revolving structure of the revolving device so as to project downward.
And a drive device for rotating the end mill, Provided so as to project below the center of rotation of the revolving structure of the revolving device.
Swivel axis, It is fixed to the manhole or its lid and the swivel axis
Body having a guide portion for engaging withWhen, Changing the engagement depth of the pivot shaft with respect to the guide portion
meansWithThe pavement around the manhole, which is characterized by
Surface cutting equipment. 3. A manipulator attached to the end of an arm of a hydraulic working machine.
A device for cutting the paved surface around the hole, A bracket attached to the tip of the arm, A turning device provided on the bracket, An engine mounted on the revolving structure of the revolving device so as to project downward.
And mill Drive device to rotate the domill
Prepare, The revolving structure can be adjusted vertically with respect to the axis of the revolving center.
Drive device mounted and vertically moving the revolving structureToPrepare
Was Cutting equipment for the pavement surface around the manhole characterized by
Place 4. The drive device for changing the turning radius of the end mill and the driving device thereof, as set forth in claim 1 , wherein the end mill and its driving device are mounted on the revolving structure so as to be positionally changeable in a turning radius direction. A cutting device for a pavement surface around a manhole, characterized by being equipped with. 5. The end mill and its drive unit according to any one of claims 1 to 4 , wherein the end mill and its drive unit are attached to a revolving structure in a vertically adjustable manner, and a drive unit for vertical movement thereof is provided. A cutting device for the paved surface around the manhole. 6. A device for cutting a pavement surface around a manhole by being attached to an end of an arm of a hydraulic working machine, the bracket being attached to the end of the arm, and being movable in front, rear, left and right directions on the bracket. A planetary gear device provided, a swing shaft eccentrically attached to the center axis of the sun gear at the center of the planetary gear device, an end mill attached to the planetary gear of the planetary gear device, and fixed to the manhole or its lid. And a guide body having a guide portion that engages with the swivel shaft, wherein the end mill is eccentrically centered around the swivel shaft to perform revolution and rotation while performing cutting while performing paving around a manhole. Surface cutting equipment. 7. A hydraulic working machine, a bracket attached to a tip of an arm of the hydraulic working machine, a turning device provided on the bracket, and an end mill attached to a turning body of the turning device so as to project downward. A drive device for rotating the end mill; a swivel shaft provided so as to project below a swivel center of a swivel body of the swivel device; and a guide portion fixed to the manhole or its lid and engaging with the swivel shaft. A cutting machine for the paved surface around the manhole, characterized by having a guide body. 8. A hydraulic working machine, a bracket attached to a tip of an arm of the hydraulic working machine, a turning device provided on the bracket, and an end mill attached to a turning body of the turning device so as to project downward. A drive device for rotating the end mill, wherein the end mill and the drive device are mounted on the revolving structure so as to be positionally changeable in a turning radius direction, and a driving device for changing the turning radius is provided. A cutting machine for the paved surface around the characteristic manhole. 9. The method according to claim 7, The end mill and its driving device are attached to
It is mounted so that its position can be changed in the radial direction, and
Equipped with a drive to change the diameter Manho characterized by
A machine for cutting the paved surface around the roll.