JP2000096512A - Cutting method, cutter and excavator for paved surface in periphery of manhole, and guide body of cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting method, a cutter and an excavator capable of efficiently cutting a paved surface in the periphery of a manhole, and the guide body of the cutter. SOLUTION: A paved surface 9 in the periphery of the manhole 7 is cut while an end mill 5 is revolved or rotated on its own axis as the center of the manhole 7 is used as the center of revolution. The end mill is revolved while being guided centering around the guide section of the guide body installed to the manhole 7, and the paved surface in the periphery of the manhole is cut while the end mill is rotated on its own axis. The cutter 1 is installed to an articulated arm 11 for a hydraulic working machine 10 or a supporter mounted on the manhole or the periphery of the manhole. The cutter 1 consists of a bracket 2, a slewing device 3, the end mill 5 set up to a revolving superstructure 4 and a driving device 5a for the end mill 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a pavement surface around a manhole, a cutting device, a cutting machine, and a guide body of the cutting device.

[0002]

2. Description of the Related Art A conventional cutting machine for cutting a pavement surface of a road is equipped with a cutting device for a pavement surface at a tip of an articulated arm of a hydraulic working machine such as a hydraulic shovel or the like to operate, turn, or travel the articulated arm. The cutting of the pavement surface is performed while moving the cutting device. Among such pavement surface cutting machines, for example, Japanese Unexamined Patent Application Publication No. 9-291509 discloses a machine in which an end mill rotated by a motor is mounted on a bracket mounted on the tip of an articulated arm.

[0003]

As described above, in order to cut a pavement surface around a manhole by using a cutting device such as an end mill attached to the tip of an articulated arm of a working machine via a bracket as described above, It is necessary to control the position of the cutting device by turning, traveling, and operating the multi-joint arm of the working machine, and there is a problem that efficiency is poor.

SUMMARY OF THE INVENTION [0004] In view of the problems of the prior art, an object of the present invention is to provide a cutting method, a cutting device, a cutting machine, and a guide body of the cutting device that can efficiently cut a pavement surface around a manhole. And

[0005]

According to a first aspect of the present invention, there is provided a method for cutting a pavement surface around a manhole while revolving an end mill around the manhole and rotating around the manhole while rotating around the manhole. Features.

[0006] As described above, by cutting the pavement surface by rotating the end mill while revolving around the manhole around the manhole, the periphery of the manhole, which is usually circular, can be cut into a circular shape, and along the outer periphery of the manhole. The pavement around the manhole can be cut efficiently. Also, even if the manhole is square, after cutting the pavement surface concentrically or spirally while leaving a part of the outer periphery of the manhole, it is not cut around the guide portion but left by the movement of the end mill. A portion along the outer periphery can be cut.

According to a second aspect of the present invention, there is provided a method for cutting a pavement surface around a manhole, wherein a guide body is fixed to the center of the manhole or a lid thereof, and the end mill is mounted around a guide portion set at the center position of the manhole in the guide body. It is characterized by cutting the pavement surface around the manhole while revolving and rotating.

As described above, if the pavement surface is cut by rotating the end mill while revolving around the guide portion at the center of the manhole and revolving around the end mill, the periphery of the manhole, which is usually circular, can be cut into a circular shape. Even a worker can perform cutting along the outer periphery of the manhole along the accurate end mill trajectory without damaging the manhole.

According to a third aspect of the present invention, in the method for cutting a pavement surface around a manhole, the pavement surface around the manhole is cut by changing the revolving radius of an end mill around the center of the manhole as the center of revolution. It is characterized by the following.

As described above, if the end mill is concentrically or spirally cut by changing the revolution radius, cutting can be performed over a wide range.

According to a fourth aspect of the present invention, there is provided a method for cutting a pavement surface around a manhole according to any one of the first to third aspects, wherein a turning shaft provided on an end mill is engaged with a guide portion of the guide body. Adjustable engagement, setting the end mill cutting depth by setting the engagement depth of the turning shaft to the guide portion, and cutting in this manner. By setting and cutting, the cutting depth of the pavement surface can be set constant.

According to a fifth aspect of the present invention, there is provided a device for cutting a pavement surface around a manhole, a supporting device fixed to the manhole, a turning device provided on the supporting device, and a projection projecting downward from a turning body of the turning device. And a driving device for rotating the end mill, and a device for changing a cutting depth by the end mill.

[0013] In the cutting device configured as described above,
With the support device fixed to the manhole, the end mill is rotated by the end mill driving device, and the cutting depth of the end mill is increased, and after cutting to a predetermined depth,
Cutting is performed while rotating the end mill while revolving by rotating the end mill. Alternatively, it is also possible to fix the support device in the manhole, revolve the end mill while rotating the end mill, gradually increase the cutting depth, and cut to a predetermined depth.

According to a sixth aspect of the present invention, there is provided an apparatus for cutting a pavement surface around a manhole, comprising: a supporting device installed on the ground around the manhole; a turning device provided on the supporting device; An end mill protruding from the end mill, a driving device for rotating the end mill, and a device for changing a cutting depth by the end mill are provided.

In the cutting device according to the sixth aspect, after the supporting device is installed on the ground around the manhole, the cutting is performed in the same manner as in the fifth aspect.

According to a seventh aspect of the present invention, there is provided an apparatus for cutting a pavement surface around a manhole by attaching to a tip of an arm of a hydraulic working machine for cutting a pavement surface around the manhole. A bracket, a revolving device provided on the bracket, an end mill protruding downward from the revolving structure and a driving device for rotating the end mill are provided.

[0017] In the cutting device configured as described above,
The turning center of the cutting device is set to the center of the manhole by operating the arm of the hydraulic working machine, the end mill is rotated by the driving device of the end mill, and the cutting depth of the end mill is increased by operating the arm, When the cutting is performed to a depth of, the end mill is revolved by the operation of the turning device, and the cutting is performed while rotating. Alternatively, it is also possible to fix the support device in the manhole, revolve the end mill while rotating the end mill, gradually increase the cutting depth, and cut to a predetermined depth.

According to an eighth aspect of the present invention, there is provided a cutting device for cutting a pavement surface around a manhole according to the sixth or seventh aspect, further comprising: a turning shaft protruding below a turning center of a turning body of the turning device;
A guide body fixed to the manhole or a lid thereof and having a guide portion rotatably receiving the turning shaft.

In the cutting device configured as described above,
The guide body is fixed to the manhole or its lid, the turning shaft of the cutting device is engaged with the guide portion of the guide body, the end mill is pressed while rotating, and after excavating to a predetermined depth, the turning device is operated. Then, the end mill is revolved around the rotation axis while rotating, thereby cutting the pavement surface around the manhole. Alternatively, it is also possible to fix the support device in the manhole, revolve the end mill while rotating the end mill, gradually increase the cutting depth, and cut to a predetermined depth.

According to a ninth aspect of the present invention, there is provided a device for cutting a pavement surface around a manhole according to the seventh aspect, wherein the revolving shaft of the revolving unit projects downward below a revolving center of the revolving body and the manhole or its lid. A guide body fixed and having a guide portion for engaging the turning shaft, and a means for changing an engagement depth of the turning shaft with the guide portion.

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

According to a tenth aspect of the present invention, in the apparatus for cutting a pavement surface around a manhole according to the seventh aspect, the revolving unit is mounted so as to be vertically adjustable with respect to an axis of a revolving center, and moves the revolving unit up and down. A drive device is provided.

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

[0024] In the eleventh aspect of the present invention, the cutting device for pavement surface around the manhole according to any one of the fifth to tenth aspects, wherein the end mill and its driving device are provided on the revolving body.
It is characterized in that it is mounted so as to be changeable in the turning radius direction, and is provided with a drive device for changing the turning radius.

As described above, the revolving radius of the end mill can be changed, and the driving device for changing the revolving radius can be provided, so that the revolving radius of the end mill can be changed and cutting can be performed over a wide range. be able to.

According to a twelfth 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 fifth to eleventh aspects, wherein the end mill and its driving device are mounted on a revolving structure so that the vertical position can be adjusted. It is characterized by having a driving device for vertical movement.

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

According to a thirteenth aspect of the present invention, there is provided a device for cutting a pavement surface around a manhole by cutting the pavement surface around a manhole by attaching the device to a tip of an arm of a hydraulic working machine. A bracket, a planetary gear device movably provided in the bracket in the front-rear, left-right direction, a turning shaft eccentrically mounted on a center 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 its lid and having a guide portion that engages with the turning shaft, while the end mill is eccentric about the turning shaft and revolves and rotates. It is characterized by performing cutting.

As described above, by employing the planetary gear device and the eccentric rotation mechanism, the end mill can revolve and rotate by only one motor, and the end mill is eccentric with respect to the center of the manhole. The trajectory can be drawn and revolved. By repeating such orbits, a wide range can be cut.

The cutting machine for pavement surface around the manhole according to claim 14 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 body. And a drive device for rotating the end mill, the end mill protruding downward from the end mill.

According to a fifteenth aspect of the present invention, there is provided a cutting machine for pavement surfaces around a manhole according to the fourteenth aspect, wherein the revolving device is provided with a revolving shaft projecting below a revolving center of the revolving unit, A guide body fixed and having a guide portion that engages with the turning shaft.

According to a sixteenth aspect of the present invention, in the cutting machine for pavement surface around the manhole according to the fourteenth or fifteenth aspect, the end mill and its driving device are mounted on the revolving body so that the position thereof can be changed in a revolving radius direction. And a drive device for changing the turning radius.

According to the cutting machines of the fourteenth, fifteenth and sixteenth aspects, the cutting operation by the cutting devices of the seventh, eighth and eleventh aspects can be performed.

The guide body of the apparatus for cutting a pavement surface around a manhole according to claim 17 is provided at the center of the base fitted into the opening of the manhole, and is provided at the center of the base, and protrudes downward from the apparatus for cutting the pavement surface. And a guide portion that engages with the rotating shaft provided.

The guide body of the apparatus for cutting a pavement surface around a manhole according to claim 18 is provided on a base fixed to a cover of the manhole, provided on a center cover of the base, and provided on a lower surface of the apparatus for cutting a pavement surface. And a guide portion for engaging the rotating shaft.

According to the guide bodies of the seventeenth and eighteenth aspects, the center of rotation of the cutting device is set at the center of the manhole, so that the periphery of the manhole can be accurately cut.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view showing an embodiment of a cutting machine for implementing a method for cutting a pavement surface around a manhole according to the present invention, FIG. 2 is an enlarged side view of a main part thereof, and FIG. FIG. 4 is a front view of FIG. 2, and FIG. 4 is a plan view for explaining the cutting method of the present invention. In FIG. 1, reference numeral 10 denotes a hydraulic working machine including a hydraulic shovel, and reference numeral 1 denotes a cutting device attached to the articulated arm 11 thereof. The hydraulic working machine 10 is provided with a turning device 1 on a wheel type traveling body 12 (which may be a crawler type).
A revolving structure 14 is installed via the revolving structure 3, an operator's cab 15 is installed on the revolving structure 14, and the articulated arm 11 is attached.

At the tip of the articulated arm 11, a cutting device 1
Are attached by a hydraulic cylinder 16 so as to be adjustable in angle. That is, the cutting device 1 is mounted on a bracket 2 for mounting to the tip of an arm 11, a revolving device 3 installed on the bracket 2, and a revolving unit 4 that is capable of adjusting the position of the revolving device 3 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 turning device 3 in a radial direction of the turning device 3. 7 is a manhole, 8 is a lid thereof, and 9 is a pavement surface around the manhole 7.

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

The revolving unit 4 is fixed to the lower surface of the revolving wheel 24. The revolving unit 4 has a gate-shaped cross section as shown in FIG. 3, and has a structure that is long in the revolving radius direction of the revolving device 3. Guide rails 25 are provided on inner walls on both sides of the revolving unit 4, and both surfaces of a frame 26 of a driving device 5a of the end mill 5
It has a ridge 27 slidably fitted on 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 unit 4 has one end connected to the revolving unit 4 by a pin 29 and the other end connected to the frame 26 by a pin 30. Can be

When the pavement surface 9 around the manhole 7 is cut using the cutting device 1 and the cutting machine, the cutting device 1 is moved 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. . Subsequently, the turning device 3 is operated,
The pavement surface 9 is concentrically cut by revolving while rotating the end mill 5. Subsequently, the hydraulic cylinder 6 is operated,
Cutting is performed by changing the cutting radius. By repeating such a cutting operation, the periphery of the manhole 7 is concentrically cut as shown in the plan view of FIG. In FIG. 4, a hatched portion 31 shows a cut region. In addition, as a cutting method, after cutting the part adjacent to the outer periphery of the manhole 7,
The spiral cutting may be performed while the hydraulic cylinder 6 is extended. Conversely, cutting may be performed by contracting the hydraulic cylinder 6 stepwise or continuously from the state where the hydraulic cylinder 6 is extended.

As described above, the periphery of the manhole 7 is cut by a predetermined width while the end mill 5 is revolving and rotating, whereby cutting can be performed efficiently. In the present invention, cutting can be performed by attaching a plurality of end mills 5 to the revolving unit 4 at positions having different turning radii and turning the end mills 5 while simultaneously driving the end mills 5. As described in the first embodiment, by configuring the driving device such as the hydraulic cylinder 6 so that the revolution radius of the end mill 5 can be changed, cutting can be performed over a wide range with a small number. In addition, since the number of end mills 5 can be reduced, cutting can be performed with a small cutting resistance. In addition, since the cutting device 1 is attached to the articulated arm 11 of the hydraulic working machine 10, movement to the manhole and position setting are easy, and mobility is high.

FIG. 5 is a side view of a cutting machine for carrying out another cutting method of the present invention, FIG. 6 is an enlarged side view of a main part thereof, and FIG. 7 is a sectional view showing the cutting state. In the present embodiment, a guide body 33 is fixed to the center of the manhole 7 by fitting it into the opening thereof, and the center of the guide body 33 is set at the center position of the manhole in the guide body 33. The pavement surface 9 around the manhole 7 is cut while revolving and rotating the end mill 5.

In order to perform such cutting, the revolving unit 4
A turning shaft 35 protruding downward is provided at the turning center of, and the turning shaft 35 is rotatably fitted to the guide portion 34. A stopper 36 for setting a cutting depth by the end mill 5 is attached to the turning shaft 35. The stopper 36 is attached at different heights by a fixing pin 39 inserted into one of a plurality of pin holes 37 provided in the pivot shaft 35,
Cutting can be performed to a depth at which the stopper 36 contacts the upper end of the guide portion 34.

At the time of cutting, the cover 8 of the manhole 7 was removed, and instead, the guide body 33 was fitted into the opening of the manhole 7, the turning shaft 35 was fitted into the guide portion 34 of the guide body 33, and the fixing pin 39 was pulled out. The turning device 3 is stopped, cutting is performed by rotating only the end mill 5, and when reaching 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, the cutting depth is set. Thereafter, the turning device 3 is operated in the same manner as described above, and the end mill 5 is revolved and the drive device 5a is rotated by the drive device 5a to perform cutting. Also, the revolving radius may be concentrically or helically cut by expansion and contraction of the hydraulic cylinder 6. .

As described above, the guide portion 34 of the guide body 33
By engaging the turning shaft 35 with the shaft and performing cutting, FIG.
As shown in the figure, it is possible to perform cutting from the diameter φ1 of the outer circumference of the manhole 7 to the diameter φ2 that the end mill 5 can reach by extending the hydraulic cylinder 6, so that even a beginner can use the vicinity of the outer circumference of the manhole 7 without skill. Can be accurately performed without leaving any cutting. Note that the stopper 36 may be configured to be tightened and fixed at an arbitrary height by a bolt inserted into a vertically long hole provided on the turning shaft 35 and a nut screwed thereto.

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

FIG. 9 is a side view showing another embodiment of the cutting apparatus of the present invention. In this example, the guide portion 34 of the guide body 33 fitted and fixed to the opening of the manhole 7 has
A turning shaft 35 at the lower end of a cylindrical shaft 41 provided to protrude downward from the turning center of the turning body 4 of the turning device 3 is fitted, and a cylindrical portion provided above and below the turning body 4 is fitted to the shaft 41. The upper and lower heads of a hydraulic cylinder 44 for vertically moving the revolving unit 4 are connected to the shaft 41 by pins 45, and
The rod of the hydraulic cylinder 44 is connected to a cylindrical portion 43 provided on the revolving unit 4 by a pin 47 slidably penetrating a vertically long guide groove 46 provided on the shaft 41. Therefore, the revolving superstructure 4 pivots with the shaft 41 and the hydraulic cylinder 44
Is moved up and down along the axis 41, whereby the cutting depth by the end mill 5 can be changed and the setting of the cutting depth can be changed. By providing the driving device such as the hydraulic cylinder 44 in this way, the free and fixing work of the stopper 36 and the like becomes unnecessary, and the work becomes easy.

FIG. 10A is a side view showing another embodiment of the present invention, and FIG. 10B is a front view thereof. In the present embodiment, the frame 26 of the driving device 5 a of the end mill 5 movably mounted in the longitudinal direction of the revolving unit 4 is
An outer frame 26a having a ridge 27 engaged with a guide rail 25, and an inner frame 26 having a driving device 5a installed therein.
b, the inner frame 26b is attached to the outer frame 25a so as to be vertically movable, and the outer frame 26a and the inner frame 26
b, a hydraulic cylinder 50 as a driving device mounted between
The height of the end mill 5, that is, the cutting depth can be changed together with the driving device 5 a by expansion and contraction of the drive device 5 a.

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

FIG. 11A shows another embodiment of a cutting device according to the present invention, and is a longitudinal sectional view showing an example of a revolving rotation device of an 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 housing of the planetary gear set attached to the bracket 2, 53 is a motor fixed to the housing 52, 54
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.

A sun gear 54 at the center of the housing 52 has a pivot 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 configuration, when the motor 52 is operated, the planetary gear 55 rotates while revolving.
As shown in FIG. 1 (B), the end mill 5 attached to the planetary gear 55 can rotate the rotating shaft 3 only by operating one motor 53.
It is possible to revolve and rotate along a locus 57 around the center 5, and it is possible to perform cutting within the range of the diameter of the end mill 5 indicated by the hatched portion 31.

FIG. 12A shows another example of a cutting device according to the present invention using a planetary gear device. By eccentrically mounting the end mill 5 on the planetary gear 55, FIG.
As shown in FIG. 11B, the end mill 5 revolves and rotates about the center O1 (center of the planetary gear) on the orbit 57 while passing through the satellite orbit 59. Cutting can be performed for a range of 31.

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

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

FIG. 14 is a side view showing another embodiment of the cutting apparatus according to the present invention. In the present embodiment, the cutting device is configured to be installed independently on the manhole 7 without supporting the cutting device by the hydraulic working machine, to support the turning device 3 on the support device 63, and to perform cutting. Things.

This cutting device comprises a support device 63 fixed to the manhole 7, a revolving device 3 mounted on the support device 63, and an end mill 5 protruding downwardly mounted on the revolving unit 4 of the revolving device 3. And a driving device 5a for rotating the end mill 5, and a telescopic device of a support device 63 for changing a cutting depth by the end mill 5.

The support device 63 includes a base 64 fitted into the opening of the manhole 7, a cylinder 65 fixed to the center of the base 64, and a rotatable stopper for the cylinder 65 so as to be vertically movable. A cylindrical body 66 which is fitted and whose upper end is connected to the frame 3a of the swivel device 3 is mounted between the cylindrical bodies 65 and 66 so as to be built in, and expands and contracts to the cylindrical body 65 with respect to the cylindrical body 65.
6, a hydraulic cylinder 6 for moving the turning device 3 up and down
7 Reference numeral 69 denotes a center joint for supplying hydraulic oil to the driving device 5a of the end mill 5 from the turning device 3 side.

This cutting device is operated by receiving a supply of hydraulic oil or power from a power unit provided in a hydraulic shovel, a truck or the like or a stationary power unit, and is mounted on a truck and transported.
When cutting is performed by this cutting device, the drive device 5a of the end mill 5 is operated to contract the hydraulic cylinder 67 to make the end mill 5 bite into the pavement surface to a predetermined depth. 5 is revolved, and cutting is performed while rotating by the drive device 5a. The device for changing the cutting depth may be configured to move the end mill 5 up and down with respect to the revolving unit 4 as shown in FIG.

As described above, if the cutting device is fixed to the manhole 7 instead of being supported by the articulated arm of the hydraulic working machine, the space dedicated to the work on the road can be reduced, and traffic can be reduced. Therefore, there is an advantage that the work can be performed in a narrow site where the hydraulic working machine cannot enter.

As described above, the supporting device 63 is connected to the manhole 7.
In the case of a structure fixed to the opening of the manhole 7, as shown in FIG. 15 (A), in order to prevent the rotation of the support device 63 with respect to the manhole 7, A structure in which a detent member 70 such as rubber is interposed therebetween, or a member 72 attached radially to a base 64 and attached to an outer end thereof as shown in FIG. It is preferable to employ a pressing structure or the like.

FIG. 16 shows an example in which a support device 74 is installed on the ground around the manhole 7 and the turning device 3 is supported by the support device 74 to constitute a cutting device. The support device 3 is for landing a plurality of legs 74a on the ground, and the revolving device 3 is fitted with an inner cylinder 75 provided on the frame 3a to an outer cylinder 76 fixed to the support device 74 so as to be vertically movable. A hydraulic cylinder 77 for changing the cutting depth by the end mill 5 is mounted between the support device 74 and the frame 3a. Also in the present embodiment, the end mill 5 may be configured to be vertically movable with respect to the revolving unit 4 to change the cutting depth. In this embodiment, effects similar to those of the embodiment of FIG. 14 can be obtained.

[0064]

According to the cutting method of the first aspect, the pavement surface is cut by rotating the end mill while revolving around the manhole with the center of revolution as the center of revolution, so that the periphery of the manhole, which is usually circular, is cut into a circular shape. It is possible to efficiently cut the pavement surface around the manhole compared with the case of cutting the pavement surface around the manhole while changing the position of the end mill using the operation of the articulated arm and the like as in the past. .

According to the cutting method of the second aspect, the pavement surface is cut by rotating the end mill around the guide portion at the center of the guide body fixed to the manhole while revolving the end mill, thereby forming the manhole which is usually circular. Can be cut in a circular shape, and even inexperienced workers can perform cutting along the outer periphery of the manhole without damaging the manhole.

According to the cutting method of the third aspect, since the end mill is concentrically or spirally cut by changing the revolution radius of the end mill, the cutting can be performed over a wide range.

According to the cutting method of the fourth aspect, since the engagement depth of the end mill is set with respect to the guide portion of the guide body for cutting, the pavement surface can be cut to an accurate and uniform depth. It becomes possible.

According to the cutting device of the fifth and sixth aspects, the cutting device is fixed to the manhole or the pavement surface around the manhole, so that a dedicated work space on the road can be narrowed and the traffic can be obstructed. Therefore, there is an advantage that work can be performed in a narrow site where the hydraulic working machine cannot enter.

According to the cutting device of the present invention, the cutting device is mounted on the hydraulic working machine and rotates the end mill while revolving to cut the pavement surface around the manhole. The surrounding pavement surface can be cut. In addition, since the turning device is supported by the hydraulic working machine, mobility is high.

According to the cutting device of the eighth aspect, the guide body is fixed to the manhole or its lid, the turning shaft of the cutting device is engaged with the guide portion of the guide body, and the end mill is mounted around the turning shaft. Since it is possible to cut the pavement surface around the manhole by rotating it while revolving, it is possible to cut the circumference of the manhole which is usually circular in a circular shape, even if it is an inexperienced worker, along the perimeter of the manhole Cutting can be performed without damaging the manhole.

According to the ninth aspect of the present invention, the turning device is supported by the arm of the working machine via the bracket, and has means for changing the engagement depth of the turning shaft with the guide portion. The cutting depth can be changed variously according to the situation.

According to the cutting device of the tenth aspect, the turning device is supported by the arm of the working machine via the bracket,
The revolving unit is mounted so as to be able to adjust the vertical position with respect to the axis of the revolving center, and is provided with a drive device for moving the revolving unit up and down.
The cutting depth by the end mill can be variously changed.

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

According to the twelfth aspect of the present invention, the end mill and its driving device are mounted on the revolving structure so that the vertical position can be adjusted, and the vertical milling drive device is provided. Various changes can be made.

According to the cutting device of the thirteenth aspect, by employing the planetary gear device and the eccentric rotation mechanism, the end mill can be rotated and rotated by only one motor, so that the number of driving devices can be reduced. . In addition, the end mill can revolve by drawing an eccentric orbit with respect to the center of the manhole, and by repeating such orbits,
Cutting can be performed over a wide range.

According to the cutting machines of the fourteenth, fifteenth and sixteenth aspects, the effects of the seventh, eighth and ninth aspects can be respectively obtained.

According to the guide bodies of the seventeenth and eighteenth aspects, the center of rotation of the cutting device can be set to the center of the manhole, and the periphery of the manhole can be cut concentrically and accurately.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a cutting machine for performing a method for cutting a pavement surface around a manhole according to the present invention.

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

FIG. 3 is a front view of FIG. 2;

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

FIG. 5 is a side view of a cutting machine that performs another cutting method of the present invention.

FIG. 6 is an enlarged side view of a main part of FIG. 5;

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

8A is an exploded perspective view showing another example of the guide body according to the present invention, and FIG. 8B is a longitudinal 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.

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

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

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

FIG. 14 is a side view showing another embodiment of the cutting device according to the present invention.

15A and 15B are longitudinal sectional views each showing a fixing device for fixing a support device to a manhole in the embodiment of FIG. 14;

FIG. 16 is a side view showing another embodiment of the cutting device according to the present invention.

[Explanation of symbols]

1: Cutting device, 2: Bracket, 3: Revolving device, 4: Revolving body, 5: End mill, 5a: Drive device, 6: Hydraulic cylinder, 7: Manhole, 8: Lid, 9: Pavement 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: pivot, 36: stopper, 37: pin hole, 39: fixing pin, 41: shaft, 4
2, 43: cylinder, 44: hydraulic cylinder, 50: hydraulic cylinder, 52: housing, 53: motor, 54: sun gear, 55: planetary gear, 63: support device, 64: base,
65, 66: cylindrical body, 70: detent member, 71: hydraulic cylinder, 74: support device, 75: inner cylinder, 76: outer cylinder, 7
7: Hydraulic cylinder

Continuing on the front page (72) Inventor Koji Sao 2-6-2 Otemachi, Chiyoda-ku, Tokyo Within Nikkachi Construction Machinery Co., Ltd. F-term in the Tsuchiura Plant (reference) 2D053 AA22 BA01 DA02 DA03

Claims (18)

[Claims] 1. A method for cutting a pavement surface around a manhole, the method comprising cutting the pavement surface around the manhole while revolving and rotating the end mill around the manhole as a center of revolution. 2. A guide body is fixed to the center of a manhole or a lid thereof, and a pavement surface around the manhole is rotated while revolving and rotating an end mill around a guide portion set at a center position of the manhole in the guide body. A method for cutting a pavement surface around a manhole, characterized by cutting. 3. The pavement surface around the manhole according to claim 1, wherein the pavement surface around the manhole is cut by changing the revolution radius of the end mill with the center of the manhole as the center of revolution. Method. 4. The guide portion of the turning shaft according to claim 2, wherein a turning shaft provided on an end mill is engaged with a guide portion of the guide body so that an engagement depth can be adjusted. A method for cutting a pavement surface around a manhole, wherein the cutting is performed by setting the cutting depth of the end mill by setting an engagement depth with respect to the end mill. 5. A support device fixed to a manhole, a revolving device provided on the support device, an end mill protruding downwardly attached to a revolving body of the revolving device, and a driving device for rotating the end mill, A device for changing a cutting depth by the end mill, the device for cutting a pavement surface around a manhole. 6. A support device installed on the ground around a manhole, a swing device provided on the support device, an end mill protruding downwardly attached to a swing body of the swing device, and rotating the end mill. A device for cutting a pavement surface around a manhole, comprising: a driving device; and a device for changing a cutting depth by the end mill. 7. A device for cutting a pavement surface around a manhole by being attached to a tip of an arm of a hydraulic working machine, comprising: a bracket attached to a tip of the arm; a turning device provided on the bracket; An apparatus for cutting a pavement surface around a manhole, comprising: an end mill protruding downward from a revolving structure of the revolving device; and a driving device for rotating the end mill. 8. The swivel shaft according to claim 6, wherein a swivel shaft projecting below the center of swivel of the swivel body of the swivel device, and a guide fixed to the manhole or its lid and engaging the swivel shaft. An apparatus for cutting a pavement surface around a manhole, comprising: a guide body having a portion. 9. The swivel device according to claim 7, further comprising: a swivel shaft protruding below a 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. And a means for changing the engagement depth of the turning shaft with respect to the guide portion. 10. A manhole structure according to claim 7, wherein said revolving unit is mounted so as to be vertically adjustable with respect to an axis of a revolving center, and is provided with a driving device for moving the revolving unit up and down. Cutting equipment for pavement surface. 11. The driving device according to claim 5, wherein the end mill and its driving device are mounted on the revolving body so as to be changeable in a turning radius direction and change the turning radius. A cutting device for a pavement surface around a manhole, comprising: 12. The end mill and a driving device thereof according to claim 5, wherein the end mill and a driving device thereof are mounted on a revolving body so that the vertical position can be adjusted, and a driving device for the vertical movement is provided. Cutting equipment for pavement surfaces around manholes. 13. An apparatus for cutting a pavement surface around a manhole by attaching to a tip of an arm of a hydraulic working machine, comprising: a bracket attached to the tip of the arm; A planetary gear device provided; a revolving shaft eccentrically mounted on a center axis of a sun gear at the center of the planetary gear device; an end mill mounted on a 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 turning shaft. A pavement around a manhole, wherein the cutting is performed while the end mill is eccentric about the turning shaft and revolves and rotates. Surface cutting equipment. 14. A hydraulic working machine, a bracket attached to an end of an arm of the hydraulic working machine, a turning device provided on the bracket, an end mill protruding downward from the revolving structure and the end mill, and A pavement surface cutting machine around a manhole, comprising: a driving device for rotating the pavement surface. 15. The swivel device according to claim 14, further comprising: a swivel shaft protruding from a lower part of a 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. A cutting machine for pavement surfaces around manholes, comprising: 16. The end mill and its driving device according to claim 14, wherein the end mill and its driving device are mounted on the revolving body so as to be changeable in the direction of a turning radius, and are provided with a driving device for changing the turning radius. A cutting machine for pavement surfaces around manholes. 17. A base fitted to an opening of a manhole, and a guide provided at the center of the base and engaged with a turning shaft provided to project downward from a pavement surface cutting device. A guide body for a cutting device for a pavement surface around a manhole, characterized in that: 18. A base fixed to a manhole cover, and a guide provided on a center cover of the base and engaged with a turning shaft provided on a lower surface of a pavement surface cutting device. The guide body of the cutting device for the pavement surface around the manhole.