KR20200032395A - Manhole Fixing Facility Ground Cutting Device - Google Patents

Abstract

The present invention comprises an LM guide device horizontally moving a cutting blade, a lifting and lowering cylinder vertically moving the same, and a screw jack rotating the same in an upper direction in a ground cutting device, thereby more conveniently varying an operation radius of the cutting blade, forming a cutting blade cover part covering the outside of the cutting blade to prevent accidents and forming a dust suction part and a water supply part to use one of a wet type or a dry type or both thereof by mixing the same.

Description

Manhole Fixing Facility Ground Cutting Device}

The present invention relates to a manhole fixed-cost ground cutting device, and more specifically, an LM guide tool for horizontally moving the cutting blade so as to conveniently change the working radius of the cutting blade provided in the ground cutting device, and an elevating cylinder for vertically moving. And, a manhole equipped with a cutting blade cover that is provided with a dust suction part and a water supply part so that a screw jack that rotates upward is provided, and either or both of the wet type or the dry type of the cutting blade can be used. It relates to a ground cutting device for maintenance.

In general, as the number of vehicles driving on the road gradually increases, and as time progresses as the speed and weight increase, the road gradually becomes obsolete and the installed manholes are collapsed or cracked, or the manhole area is caused by the pavement layer overlay construction of the road. If it is relatively lower than the surface of the road, the construction of repairing the manhole installed on the pavement of the road will be performed.

The manhole repair work is to break the asphalt, which is the road pavement surface where the manhole is installed, with a breaker or cut it as a cutter, and then cover the upper part of the manhole frame with the manhole frame buried under the ground, and the manhole cover exposed to the road pavement Was replaced by a new one.

However, the work of crushing and removing the road pavement surface using a breaker was not only a lot of noise generated during the work and manpower required for this, but also took a long time to work.

In addition, as a cutting machine, the road pavement surface is cut while proceeding in a straight line direction, and the direction of the cutter is changed to perform a cutting operation in a substantially square shape, and then the road pavement surface is excavated to replace the manhole made of mantle and manhole with a new one. Work was performed.

However, in the conventional work, as the worker cuts the pavement surface into a square, the cutting shapes are unbalanced with respect to manholes formed in a large circular shape, and uncomfortable points on vehicle traffic after repair are exposed, while cutting work is discontinued. There is a problem in that the work productivity is lowered due to being made.

On the other hand, the present applicant recently developed and applied an excessive technique to a cutting machine for cutting a road pavement surface outside of a manhole, and Korean Patent No. 10-1771790 has been disclosed as a related technical document.

However, the prior art does not have a function of adjusting the cutting outer diameter or adjusting the depth of cutting the pavement surface according to the manhole provided in various outer diameter sizes according to the size and use of the road. There was a problem that can not be performed elastically and quickly.

In addition, while the worker directly inhales the fine dust and dust generated when cutting the pavement surface of the road using a cutting machine, the health of the worker is inhibited while the generated fine dust and dust are released into the atmosphere and exposed, thereby inhibiting the atmospheric environment. There was a problem to let.

The present invention was created to solve the problems of the prior art as described above. The object of the present invention is to move the cutting blade horizontally inside the ground cutting device, the LM guide tool, the vertically moving cylinder, and the upper and lower cylinders. It is equipped with a screw jack that rotates to make the working radius of the cutting blade more convenient, and forms a cutting blade cover part that covers the outside of the cutting blade to prevent safety accidents, and forms a suction part and a water supply part to form a wet type. Or to provide a manhole fixed cost ground cutting device that can be used in combination with any one or two of the dry type.

Manhole fixed cost ground cutting device according to the present invention for achieving the above object is a manhole fixed cost ground cutting device that cuts the ground to repair the manhole, seated on the top surface of the manhole and penetrating through the center of the ground cutting device A rod-shaped shaft center portion; A pipe-shaped up and down housing which is inserted into the outer circumferential surface of the shaft center and moves in the vertical direction; A housing part made of a ring bearing connected to a lower end of the elevating housing, and a pipe-shaped rotary housing connected to the ring bearing and rotated left and right; A lower body portion formed of a plate-shaped lower plate connected to an outer peripheral surface of the rotating housing, and an LM guide sphere formed on an upper surface of the lower plate; A plate-shaped center plate seated on an upper surface of the LM guide sphere and moved in a horizontal direction, an engine provided on an upper surface of the center plate to generate rotational force, a pulley belt sphere connected to a drive shaft of the engine, and the other end of the pulley belt sphere A central cutting portion consisting of a cutting blade in the shape of a disk connected to the; A plate-shaped upper plate fixed to the lower portion of the elevating housing, a hydraulic motor seated to penetrate downwardly from an upper surface of the upper plate, a driving gear connected to a rotating shaft of the hydraulic motor, and connected to an upper portion of the rotating housing It is characterized in that it consists of a rotary drive unit made of a rotating gear meshed with the drive gear.

On one side of the lower plate, a housing insertion groove is cut inwardly so that the rotary housing is inserted, and a hinge pin and the hinge protruding from the outer circumferential surface of the rotary housing so that the lower plate is rotated inside the housing insertion groove. It is characterized in that the hinge plate is formed is a pin is inserted.

A vertical rotation part for rotating the lower plate in a vertical direction is provided at an upper portion of the central plate; The vertical rotating part is a plate-shaped screw plate fixed to the upper portion of the rotating housing, a screw jack seated on the upper surface of the screw plate, a screw rod connected to a lower portion of the screw jack and penetrating downward from the screw plate, It is provided at the lower end of the screw rod, it characterized in that the vertical rotation is made of a screw hinge seated on the upper surface of the lower plate.

An elevating portion for elevating and elevating the upper plate is formed on an upper portion of the upper plate; The elevating portion is a plate-shaped elevating plate formed on an upper portion of the upper plate, an elevating cylinder installed in both directions on the both side surfaces of the elevating plate, and formed on both side surfaces of the upper plate and connected to the cylinder mounting cylinder. It is characterized by being made.

A cutting edge cover portion is formed on one side of the center plate to cover the outside of the cutting blade; The cutting blade cover portion is connected to the upper surface of the center plate and the lower cover-shaped cover body, the rectangular pipe-shaped lifting cover inserted in the lower portion of the cover body, and cutting on both sides of the lifting cover It is characterized in that it consists of a dust suction unit for sucking the dust generated at the time, and a water supply unit for supplying lubricating water to the front surface of the cover body.

The outer peripheral surface of the rotary housing is characterized in that a cylindrical tank for supplying lubricating water through a pipe connected to the water supply is provided.

The cutting blade is characterized by consisting of a curved disc-shaped blade body and a diamond tip attached diagonally to one surface of the blade body.

A wet and dry dust collecting part connected to the dust suction part to suck foreign substances is provided on an outer circumferential surface of the rotating housing; The dry and wet dust collecting part is composed of a plate-shaped dust collecting body seated on the rotating housing and installed in the opposite direction of the lower body part, and a vacuum suction device connected to the dust suction part on the upper part of the dust collecting body to suck foreign matter. do.

The vacuum suction device is provided with a pre-processing collecting part that primarily collects water or large foreign matter flowing through the dust suction part; The pre-treatment collection part includes a box-shaped collection container that accommodates the foreign matter having large water or particles, a collection cover that is rotated up and down on the upper part of the collection container, and an outlet connected to the vacuum suction device on one surface of the collection cover. , It characterized in that it consists of an inlet connected to the dust suction.

In this way, the manhole fixed cost ground cutting device according to the present invention has the following effects.

First, by providing a lower body portion formed with an LM guide sphere for moving the cutting blade in the horizontal direction inside the ground cutting device, the cutting edge of the cutting blade is easily moved horizontally through the LM guide sphere through the central cutting portion where the cutting blade is installed. You can zoom in or out,

Second, the rotation of the cutting blade is driven by the engine, greatly improving the cutting force,

Third, by providing a pair of elevating cylinders for vertically raising and lowering the central cutting portion where the cutting blade is installed, the depth of the cutting groove cut on the ground can be easily varied,

Fourth, by forming a cutting blade cover portion that covers the outside of the cutting blade, it is possible to prevent the rotating cutting blade directly exposed to the user by covering the outer portion of the cutting blade,

Fifth, by forming a dust suction part that removes dust generated during cutting on the cutting edge cover part and a water supply part that is supplied with lubricating water so that cutting can be performed more smoothly, the working method of the ground cutting device is either wet or dry. Either one or two can be used in combination, which greatly expands the choice of work method.

Sixth, by forming a diamond-shaped diamond tip on the surface of the cutting blade, there is an effect that can further improve the cutting force of the ground,

Seventh, by providing a wet and dry dust collecting part on the opposite side of the heavy engine part, it maintains a weight balance when lifting and lowering the ground cutting device, preventing inclination in one direction, and having the effect of directly sucking foreign matter generated during the cutting operation.

1 is a use state diagram showing a ground cutting device according to the present invention,
Figure 2 is a perspective view showing a ground cutting device according to the present invention,
3 is an exploded perspective view showing a ground cutting device according to the present invention,
Figure 4 is a plan view showing a ground cutting device according to the present invention,
5 is a front view showing the horizontal movement of the ground cutting device according to the present invention,
6 is a front view showing a vertical rotating part of the ground cutting device according to the present invention,
Figure 7 is a side view showing the elevation of the ground cutting device according to the present invention,
FIG. 8 is an enlarged view of “A” shown in FIG. 7 and is a partial cross-sectional view showing a housing part,
9 is a partial side cross-sectional view showing a cutting blade cover portion of the ground cutting device according to the present invention,
10 is a partial perspective view showing a cutting blade of the ground cutting device according to the present invention
11 is a front view showing a wet and dry dust collecting unit according to the present invention,
Figure 12 is a partial front view showing a pre-processing trap according to the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Manhole fixed cost ground cutting device according to the present invention is a manhole fixed cost ground cutting device (1) for cutting the ground (G) for manhole (M) maintenance as shown in Figures 1 to 5, the manhole (M) A rod-shaped shaft center portion 10 seated on an upper surface of the ground and penetrating through a central portion of the ground cutting device 1; A pipe-shaped elevating and descending housing 21 inserted into the outer circumferential surface of the shaft center portion 10 and moved in the vertical direction; A housing part 20 consisting of a ring bearing 22 connected to the lower end of the elevating housing 21 and a pipe-shaped rotary housing 23 connected to the ring bearing 22 and rotated left and right; A lower body part 30 made of a plate-shaped lower plate 31 connected to an outer circumferential surface of the rotary housing 23 and an LM guide sphere 32 formed on an upper surface of the lower plate 31; A plate-shaped center plate 41 mounted on an upper surface of the LM guide sphere 32 and moved in a horizontal direction, an engine 42 provided on an upper surface of the center plate 41 and generating rotational force, and the engine ( A central cutting part 40 consisting of a pulley belt opening 43 connected to a drive shaft of 42, and a disk-shaped cutting blade 44 connected to the other end of the pulley belt opening 43; The plate-shaped upper plate 51 fixed to the lower portion of the elevating housing 22, the hydraulic motor 52 seated to penetrate downward from the upper surface of the upper plate 51, and the hydraulic motor 52 It consists of a driving gear (53) connected to the rotating shaft of the, and a rotating drive unit (50) made of a rotating gear (54) connected to the upper part of the rotating housing (23) and engaged with the driving gear (53).

On the other hand, the shaft core portion 10 is installed to penetrate the housing portion 20 is preferably installed so that the elevating housing 21 is slidingly moved on the shaft portion 10.

Here, the LM guide 32 is a pair of rotating seat (not shown) seated on the upper surface of the lower plate 31 and the rotating rod (not shown) is installed between the rotating screw (not shown) ), Horizontally moved from the screw rod (not shown), and made of a central rotating hole (not shown) fixed to the central plate 41, and a drive device such as a motor connected to the screw rod (not shown) desirable.

Further, a housing insertion groove 311 in which an incision is cut inward is formed on one side of the lower plate 31 so that the rotary housing 23 is inserted, and the lower plate 31 is disposed inside the housing insertion groove 311. A hinge pin 312 protruding from the outer circumferential surface of the rotating housing 23 and a hinge plate 313 into which the hinge pin 312 is inserted are formed to rotate.

In addition, the upper portion of the center plate 41 is provided with a vertical rotation unit 60 for rotating the lower plate 31 in the vertical direction as shown in Figure 6; The vertical rotation part 60 is a plate-shaped screw plate 61 fixed to the upper portion of the rotary housing 23, a screw jack 62 seated on the upper surface of the screw plate 61, and the screw jack 62 ) Is connected to the lower portion of the screw rod (61) penetrating in the downward direction from the screw plate (61), is provided on the lower end of the screw rod (63) and the screw hinge (64) seated on the upper surface of the lower plate (31) ) Is provided with a vertical rotation (60).

On the other hand, it is preferable that one side of the lower plate 31 and the screw plate 61 is formed with a plate-shaped installation portion (not shown) protruding in one direction so that the vertical rotation portion 60 is installed in an upright shape.

Here, the upper portion of the screw jack 62 is preferably provided with a ring-shaped handle (not shown) so that the user can manually rotate the screw rod (63).

And, the upper and lower portions of the upper plate 51, as shown in Figures 7 to 8, the elevating portion 70 for elevating and elevating the upper plate 51 is formed; The elevating portion 70 is a plate-shaped elevating plate 71 formed on an upper portion of the upper plate 51, and the elevating cylinder 72 installed on both sides of the elevating plate 71 in a downward direction, and the upper plate It is formed on both sides of the (51) and consists of a cylinder installation opening 73 to which the lifting cylinder 72 is connected.

On the other hand, the cylinder mounting hole 73 is preferably seated on both sides of the upper plate 51, the lower end is preferably formed in a "a" shape to extend to the lower portion of the upper plate 51.

In addition, a cutting edge cover portion 80 is formed on one side of the center plate 41 to cover the outside of the cutting blade 44 as shown in FIG. 9; The cutting blade cover portion 80 is connected to the upper surface of the central plate 41 and the box-shaped cover body 81 with the lower portion opened, and the square pipe shape inserted into the lower portion of the cover body 81. Lubrication water (W) is supplied to the lower cover 82, the dust suction part 83 for sucking dust generated during cutting on both sides of the lifting cover 82, and the front surface of the cover body 81. It consists of a water supply unit 84.

On the other hand, the front surface of the cover body 81 is preferably provided with a plate-shaped body cover (not shown) that is fastened with a bolt.

In addition, it is preferable that a pipe (not shown) through which dust or water is moved is connected to the dust suction unit 83 and the water supply unit 84.

Then, the outer peripheral surface of the rotary housing 23 is provided with a cylindrical tank 90 for supplying the lubricating water (W) through the pipe (L) connected to the water supply unit 84 as shown in FIG.

On the other hand, the tank 90 is formed in a pipe shape to be inserted into the outer circumferential surface of the rotary housing 23, it is preferably formed to be divided into half of the pipe shape to improve the fastening.

In addition, the cutting blade 44 is composed of a curved disc-shaped blade body 441 and a diamond tip 442 attached diagonally to one surface of the blade body 441, as shown in FIG.

And, on the outer circumferential surface of the rotary housing 23, as shown in Figure 11 is connected to the dust suction unit 83 is provided with a wet and dry dust collecting unit 100 for sucking foreign matter; The wet and dry dust collecting part 100 is seated on the rotary housing 23 and installed in the opposite direction of the lower body part 30, the plate-shaped dust collecting body 101 and the dust suction on the upper part of the dust collecting body 101 It is made of a vacuum suction device 102 that is connected to the unit 83 and sucks foreign matter.

In addition, the vacuum suction device 102, as shown in Figure 12, the pre-treatment collection unit for collecting the water (W) or large foreign matter (D) flowing through the dust suction unit 83 primarily ( 110) is provided.

At this time, the pre-processing collecting part 110 is rotated up and down and rotated up and down on a box-shaped collecting container 111 that accommodates the water (W) or a large foreign matter (D). It consists of a collection cover 112, an outlet 113 connected to the vacuum suction device 102 on one surface of the collection cover 112, and an inlet 114 connected to the dust suction unit 83.

Looking at the operation of the manhole fixed cost ground cutting device according to the present invention made of the above configuration is as follows.

Manhole fixed cost ground cutting device according to the present invention is a manhole fixed cost ground cutting device (1) for cutting the ground (G) for manhole (M) maintenance as shown in Figures 1 to 5.

That is, the ground cutting device (1) is provided with a disk-shaped cutting blade (44) that is rotated at a predetermined radius on the outer circumferential surface of the shaft center portion (10) seated on the upper surface of the manhole (M), and cuts the ground. When the cutting blade 44 cuts the ground G, the shape of the ground to be cut is circular, that is, the same can be cut by rotating at a predetermined radius.

At this time, on the outer circumferential surface of the shaft center portion 10, the housing portion 20 is formed in a pipe shape that is raised and lowered in a vertical direction and rotated in an arc radius to connect the cutting blade 44 to the housing portion 20. When cutting the cutting blade 44, it can be easily rotated to a predetermined radius.

Here, the housing part 20 is inserted into the outer circumferential surface of the shaft center portion 10 as shown in Figure 8, the vertically and downward housing 21 moved in the vertical direction; The elevating housing 21 consists of a ring bearing 22 connected to the lower end of the elevating housing 21 and a rotary housing 23 connected to the ring bearing 22 and rotated in a radial direction. Riding and descending on the shaft 10, the rotary housing 23 is rotated in the radial direction through the ring bearing 22.

At this time, the upper portion of the upper plate 51, as shown in FIG. 7, the upper and lower cylinders 72 are fixed so that the lifting cylinders 72 fixed to both sides of the upper plate 51 are moved up and down. By being provided with a steel sheet 71, the upper plate 51 is vertically raised and lowered, and all lower components connected to the upper plate 51 are raised and lowered to facilitate the height of the cutting blade 44. It becomes variable.

In addition, as shown in Figure 5, the lower body portion 30 made of a plate-shaped lower plate 31 connected to the outer circumferential surface of the rotary housing 23 and an LM guide sphere 32 formed on the upper surface of the lower plate 31 By being provided, it is possible to enlarge or reduce the cutting radius of the cutting blade 44 by horizontally moving the central cutting portion 40 on which the cutting blade 44 is installed through the LM guide opening 32.

Meanwhile, an upper surface of the central cutting part 40 is provided with an engine 42 that generates a driving force so that the cutting blade 44 is rotated, and a pulley belt opening 43 that transmits the driving force to the cutting blade 44. , It is possible to easily rotate the cutting blade (44).

And, as shown in Figure 4 by being connected to the upper portion of the rotary housing 23 and the rotation drive unit 50 made of a rotation gear 54 engaged with the drive gear 53, by being provided, the hydraulic motor 52 Through the rotation of the cutting blade 44 it is possible to rotate the cutting radius.

In addition, the upper portion of the central plate 41 is provided with a vertical rotating portion 60 for rotating the lower plate 31 in the vertical direction, as shown in Figure 6, the screw jack 62 of the vertical rotating portion 60 The cutting blade 44 is raised and lowered by elevating one surface of the lower plate 31 through a hinge pin 312 and a hinge plate 313 which rotate a hinge action on one side of the lower plate 31. By forming to be able to elevate the lifting action of the cutting blade 44.

In addition, a cutting edge cover portion 80 covering the outside of the cutting blade 44 is formed on one side of the center plate 41 as shown in FIG. 9, so that the outer portion of the cutting blade 44 is formed. It is possible to prevent the cutting blade 44 that is rotated by being covered is directly exposed to the user.

At this time, the cutting blade cover portion 80 is formed by a dust suction portion 83 for removing dust generated during cutting, and a water supply portion 84 for supplying lubricating water (W) so that the cutting proceeds more smoothly, Among the working methods of the ground cutting device 1, a wet type and a dry type can be mixed.

In addition, the outer circumferential surface of the rotary housing 23 is provided with a cylindrical tank 90 for supplying lubricating water (W) through a pipe (L) connected to the water supply unit 84, as shown in FIG. The lubricating water (W) supplied to the water supply unit 84 can be solved by itself.

And, the cutting blade 44 is composed of a curved disk-shaped blade body 441 and a diamond tip 442 attached diagonally to one surface of the blade body 441, as shown in FIG. It is possible to further improve the cutting force of the ground G.

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be implemented by anyone who has ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, such changes are within the scope of the claims.

<Description of major parts of drawings>
M: Manhole G: Ground
1: Ground cutting device 10: Shaft center
20: housing 21: elevating housing
22: ring bearing 23: rotary housing
30: lower body portion 31: lower plate
311: housing insertion groove 312: hinge pin
313: hinge plate 32: LM guide
40: center cutting section 41: center plate
42: engine 43: pulley belt
44: cutting blade 441: blade body
442: diamond tip 50: rotating drive
51: upper plate 52: hydraulic motor
53: driving gear 54: rotating gear
60: vertical rotation part 61: screw plate
62: screw jack 63: screw rod
64: screw hinge 70: elevating part
71: elevating plate 72: elevating cylinder
73: cylinder mounting port 80: cutting blade cover
81: cover body 82: lifting cover
83: dust suction unit 84: water supply unit
90: tank 100: wet and dry dust collection unit
101: dust collecting body 102: vacuum suction device
110: pre-treatment collection unit 111: collection container
112: collection cover 113: outlet
114: inlet

Claims (9)

In the manhole maintenance cost ground cutting device (1) for cutting the ground (G) for manhole (M) maintenance,
A shaft center portion 10 seated on an upper surface of the manhole M and penetrating through a central portion of the ground cutting device 1;
A pipe-shaped elevating and descending housing 21 inserted into the outer circumferential surface of the shaft center portion 10 and moved in the vertical direction; A housing part 20 consisting of a ring bearing 22 connected to a lower end of the elevating housing 21 and a pipe-shaped rotary housing 23 connected to the ring bearing 22 and rotated left and right;
A lower body portion 30 made of a plate-shaped lower plate 31 connected to an outer circumferential surface of the rotary housing 23 and an LM guide sphere 32 formed on an upper surface of the lower plate 31;
A plate-shaped center plate 41 mounted on an upper surface of the LM guide sphere 32 and moved in a horizontal direction, an engine 42 provided on an upper surface of the center plate 41 and generating rotational force, and the engine ( A central cutting part 40 consisting of a pulley belt opening 43 connected to a drive shaft of 42, and a disk-shaped cutting blade 44 connected to the other end of the pulley opening 43;
A plate-shaped upper plate 51 fixed to a lower portion of the elevating housing 22, a hydraulic motor 52 seated to penetrate downward from an upper surface of the upper plate 51, and the hydraulic motor 52 A manhole fixed, characterized in that it comprises a driving gear (53) connected to the rotating shaft, and a rotating drive part (50) connected to the upper part of the rotating housing (23) and engaged with the driving gear (53). Cost ground cutting device. According to claim 1,
On one side of the lower plate 31, a housing inserting groove 311 is cut inward so that the rotary housing 23 is inserted, and the lower plate 31 is rotated inside the housing inserting groove 311. A manhole fixed cost ground cutting device characterized in that a hinge pin 312 protruding from the outer circumferential surface of the rotating housing 23 and a hinge plate 313 into which the hinge pin 312 is inserted are formed. According to claim 2,
A vertical rotation unit 60 for rotating the lower plate 31 in the vertical direction is provided on the upper portion of the central plate 41;
The vertical rotation part 60 is a plate-shaped screw plate 61 fixed to the upper portion of the rotary housing 23, a screw jack 62 seated on the upper surface of the screw plate 61, and the screw jack 62 ) Is connected to the lower portion of the screw rod (63) penetrating downward from the screw plate (61), is provided on the lower end of the screw rod (63) and the screw hinge (64) seated on the upper surface of the lower plate (31) ) Manhole fixed cost ground cutting device, characterized in that consisting of. According to claim 1,
The upper plate 51 has an upper and lower portion 70 for elevating the upper plate 51 is formed;
The elevating portion 70 is a plate-shaped elevating plate 71 formed on an upper portion of the upper plate 51, and the elevating cylinder 72 installed on both sides of the elevating plate 71 in a downward direction, and the upper plate Manhole fixed cost ground cutting device, which is formed on both sides of (51) and is made of a cylinder installation opening (73) to which the lifting cylinders (72) are connected. According to claim 1,
A cutting edge cover portion 80 covering the outside of the cutting blade 44 is formed on one side of the center plate 41;
The cutting blade cover portion 80 is connected to the upper surface of the center plate 41 and the box-shaped cover body 81 with its lower portion opened, and a square pipe shape inserted into the lower portion of the cover body 81. Lubrication water (W) is supplied to the lower cover 82, the dust suction part 83 for sucking dust generated during cutting on both sides of the lifting cover 82, and the front surface of the cover body 81. Manhole fixed cost ground cutting device, characterized in that consisting of a water supply unit (84). The method of claim 5,
Manhole fixed cost ground cutting device, characterized in that the outer peripheral surface of the rotary housing 23 is provided with a cylindrical tank 90 for supplying lubricating water (W) through a pipe (L) connected to the water supply (84). According to claim 1,
The cutting blade 44 is a manhole fixed cost ground cutting device, characterized in that it consists of a curved disc-shaped blade body 441 and a diamond tip 442 attached diagonally to one surface of the blade body 441. The method of claim 5,
On the outer circumferential surface of the rotary housing 23, a dry and wet dust collecting unit 100 is connected to the dust suction unit 83 to suck foreign matter;
The wet and dry dust collecting part 100 is seated on the rotary housing 23 and installed in the opposite direction of the lower body part 30, the plate-shaped dust collecting body 101 and the dust suction on the upper part of the dust collecting body 101 Manhole fixed cost ground cutting device, characterized in that consisting of a vacuum suction device 102 that is connected to the unit 83 and sucks foreign matter. The method of claim 8,
The vacuum suction device 102 is provided with a pre-treatment collection unit 110 that primarily collects water (W) or particles with large particles (D) flowing through the dust suction unit (83);
The pre-processing collecting part 110 includes a box-shaped collecting container 111 that accommodates the water (W) or large foreign matter (D), and a collecting that is rotated up and down on the upper portion of the collecting container 111. A manhole comprising a cover 112, an outlet 113 connected to the vacuum suction device 102 on one surface of the collection cover 112, and an inlet 114 connected to the dust suction part 83. Ground cutting device for maintenance.

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