JP3457561B2 - Cutting equipment and cutting machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device and a cutting work machine having a cutting blade that is rotationally driven.

[0002]

2. Description of the Related Art As disclosed in Japanese Unexamined Patent Publication No. 9-177023, there is disclosed a road surface cutting machine in which a road surface cutting device is provided at the tip of a working arm of a hydraulic excavator instead of a bucket.

In this conventional road surface cutting device, a cutting member rotated by a hydraulic motor has a plurality of first cutting blades which are substantially radial and obliquely downward, and a plurality of first cutting blades which are substantially radial and obliquely downward. Two cutting blades are provided, and the tip portion of the first cutting blade body is provided at a position above the tip portion of the second cutting blade body and far from the center of rotation.

Then, by rotating the cutting member and cutting the asphalt-paved or concrete-paved road surface by the tips of the first and second cutting blade bodies, the cutting member is moved along the road surface. Chiseling work is done to remove the surface of asphalt and concrete.

This conventional road surface cutting machine moves the road surface up and down 2
In the case of cutting into steps, there is an advantage that efficient cutting can be performed by cutting the upper step portion with the first cutting blade body and then cutting the lower step portion with the second cutting blade body.

[0006]

On the other hand, in this conventional road surface cutting machine, the impact load does not act evenly on the first and second cutting blades, and the impact load applied to one cutting blade is large. Therefore, the cutting blade wears quickly and has a short life, and is not suitable for work that cuts the road surface into a flat surface.For example, in the chiseling work to remove asphalt around the manhole,
There is a problem that asphalt cannot be removed sufficiently.

The present invention has been made in view of the above points, and an object thereof is to provide a cutting device and a cutting work machine which can improve the wear life of the cutting blade and can cut the surface to be cut flat. To do.

[0008]

According to a first aspect of the present invention, a rotary body that is rotationally driven and a rotary surface that is rotated by the rotary body so as to face a surface to be cut are respectively provided on a plurality of concentric circles. A plurality of cutting blades that are attached and whose tips are located on a plane parallel to the plane of rotation and the center of rotation on the plane of rotation of the rotor are installed.
Guides the movement of the rotating body while cutting the attached cutting surface
Guide blade and the height adjustment to adjust the mounting height of the guide blade
It is a cutting device provided with an adjusting means .

As a result, the tips of the plurality of cutting blades respectively mounted on the plurality of concentric circles are located on a plane parallel to the surface of rotation on which the cutting blades are attached, so that the tips of these cutting blades are attached. Since the impact load acts evenly and the impact load that one cutting blade bears is reduced, the life of the cutting blade increases due to wear, and each cutting located on a plane parallel to the rotating surface. The surface to be cut is cut flat by the tip of the blade. Furthermore, the surface to be cut is the center of rotation of the rotor.
The guide blade that guides the movement of the rotating body while cutting the
The impact of the eccentric position of the cutting blade on the surface to be cut.
While preventing misalignment of the rotating body due to impact, the smoothness of the rotating body
Ensure stable movement and perform cutting work in a stable state.
Especially, according to the hardness of the surface to be cut, etc., remove the guide blade
The height to be adjusted is adjusted to the optimum state by the height adjusting means.

According to a second aspect of the present invention, in the cutting device according to the first aspect, a plurality of cutting blades are provided on a plurality of concentric circles of the rotating surface so as to project obliquely in a rotating direction from a vertical axis to the rotating surface. And have different angles with respect to the tangential direction of each circle.

As a result, even if the cutting blades are on the same circle, their tips draw a plurality of rotational trajectories to cut the surface to be cut finely and flatly.

[0012] The invention described in 請 Motomeko 3 includes a traveling body,
The cutting body according to claim 1 or 2 , wherein the swing body is rotatably provided on the traveling body, the working arm body is provided on the swing body and to which a plurality of movable members are connected, and the working arm body is attached to a tip end portion of the working arm body. It is a cutting work machine equipped with a device.

As a result, the traveling body can claim 1 or
The cutting device described in 2 is carried to the surface to be cut, and the rotary body of the cutting device is operated to move the rotating body of the cutting device parallel to the surface to be cut while efficiently performing flat cutting of the surface to be cut.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

FIG. 4 shows an embodiment of a cutting work machine for cutting an asphalt pavement road surface, which is an improvement of a small hydraulic excavator, and shows a lower part equipped with a crawler belt 11 driven by a traveling hydraulic motor. An upper revolving structure 14 is rotatably provided on the upper side of the traveling structure 12 via a revolving unit 13 operated by a revolving hydraulic motor. This revolving structure 14
In addition to the seat 15 and the canopy 16, the engine, the hydraulic power source device driven by the engine, the control valve for controlling the hydraulic circuit, the pedals and levers for operating the control valve.
17 and so on.

The revolving unit 14 is provided with a working arm 18 to which a plurality of movable members are connected, and a cutting device 19 is attached to the tip of the working arm 18.

The work arm 18 has a boom 21 having a base end rotatably connected to the revolving structure 14 such that the base end of the boom 21 is rotatable.
A base end of 22 is rotatably axially coupled, and a bracket 23 of the cutting device 19 is rotatably axially coupled to a tip of the arm 22.

The boom 21 is provided with a boom hydraulic cylinder 24 provided between the boom 22 and the revolving structure 14 so that the arm 22 is moved to the boom 21.
With the arm hydraulic cylinder 25 provided between the arm 23 and the arm 22, the bracket 23 of the cutting device 19 is rotated with the hydraulic cylinder 26 and the link 27 provided between the arm 22 and the arm 22, respectively.

The swing motion of the swing body 14 by the swing hydraulic motor moves the cutting device 19 in the left-right direction, and the rotation of the boom 21 by the boom hydraulic cylinder 24 moves the cutting device 19 mainly in the up-down direction. Rotation of the arm 22 by the arm hydraulic cylinder 25 mainly moves the cutting device 19 in the front-back direction, and rotation of the bracket 23 by the hydraulic cylinder 26 adjusts the inclination angle of the cutting device 19.

As shown in FIG. 5, in the cutting device 19, the bracket 23 is integrally attached to the upper end of the device body 31, and the motor body of the hydraulic motor 32 built in the device body 31 is the device body 31. A rotary shaft 33 that is fixed at the bottom and is fitted with a drive shaft (not shown) of the hydraulic motor 32 and connected by a key.
In addition, a disk as a rotating body that is rotationally driven by the hydraulic motor 32.
34 is attached integrally, and the surface A to be cut is cut by this disk 34.
A plurality of cutting blades 36 are attached to a rotating surface 35 which is rotated in opposition to (FIG. 4).

A hose lead-out hole 37 is cut out in the upper part of the apparatus main body 31, and a hydraulic hose 38 connected to the hydraulic motor 32 is drawn out from the hose lead-out hole 37, and passes through a pipe along the working arm 18, It is connected to a control valve mounted on the revolving structure 14.

Next, FIG. 1 and FIG. 2 show the cutting device 19
1 shows an embodiment of a cutting blade body 36 in which the cutting bits 42 are fitted into and disengaged from respective bit fitting cylinder parts 41 integrally attached to the rotating surface 35 of the disk 34. It was fitted as much as possible. A flange portion 43 formed integrally with the cutting bit 42 is engaged with an opening edge of the bit fitting cylinder portion 41.

As shown in FIG. 1, the plurality of cutting blades 36 mounted on the disk 34 are respectively mounted on a plurality of concentric circles of the rotating surface 35, and are arranged on the plurality of concentric circles from a vertical axis with respect to the rotating surface 35. The projections are obliquely provided in the rotation direction and have different angles with respect to the tangential direction of each circle.

For example, the cutting blade body 36 shown in FIG. 1 has two rows on the large diameter circle and the small diameter circle on the rotation surface 35 of the disk 34.
Six pieces are attached to each, and they are attached at three kinds of angles of 0 °, 10 °, and 20 ° toward the outside with respect to the tangential direction of each circle.

As shown in FIG. 2, the cutting bits 42 of each cutting blade 36 mounted on the large-diameter circle and the small-diameter circle of the disk 34 have all their tips 44 parallel to the rotating surface 35. It is installed so as to be located on the same plane 45 that is supposed to be.

In FIGS. 1 and 2, a plurality of holes 46 formed in the central portion of the disc 34 are formed in the disc 34 with respect to the rotary shaft 33.
Mounting holes of the rotary shaft 33 and the disk 34 by bolts (not shown in FIGS. 1 and 2) inserted into these holes 46.
And are concentrically integrated.

Next, the operation of the embodiment shown in FIGS. 1, 2, 4 and 5 will be described.

The cutting device 19 is cut by the traveling body 12 on the surface A to be cut.
Disk to drive the hydraulic motor 32 of the cutting device 19
34 is rotated, the revolving unit 14 and the working arm 18 are operated to lower the cutting device 19 onto the surface A to be cut, and then, while being moved in parallel to the surface A to be cut, each cutting provided on the disk 34. a switching cutting bit 42 of the blade 36 into contact with the cutting object surface a, performs so-called chipping operation.

At this time, the tips 44 of the plurality of cutting blades 36 respectively mounted on the plurality of concentric circles of the rotating surface 35 which is rotated by the disk 34 so as to face the surface A to be cut are moved by the cutting blades 36. Since the cutting blades 36 are located on the same plane 45 parallel to the attached rotating surface 35, the tips 44 of the respective cutting blades 36 can be brought into uniform contact with the surface A to be cut.

For this reason, the impact load is evenly applied to the tips 44 of these cutting blades 36, and the impact load that one cutting blade 36 bears is reduced. With a long life, the cutting target surface A is cut flat by the tip 44 of each cutting blade 36 located on a plane 45 parallel to the rotating surface 35. For example, in repairing an asphalt paved road surface, a manhole Asphalt around the area can be cut and removed evenly.

Further, the surface A to be cut is cut by the tips 44 of a plurality of cutting blades 36 provided obliquely in the direction of rotation from a plurality of concentric circles of the rotating surface 35 and having different angles with respect to the tangential direction of each circle. Therefore, cutting blades mounted on the same circle
Even in 36, the tip 44 draws a plurality of rotation loci, and the surface A to be cut can be finely and flatly cut.

Next, FIG. 3 shows another embodiment of the cutting device 19, which has all the components of the cutting device 19 shown in FIGS. 1 and 2 and further has a guide blade body. The pilot bit 51 is provided.

The pilot bit 51 is attached to the center of rotation of the rotating surface 35 of the disk 34 as a rotating body and guides the movement of the disk 34 while cutting the surface A to be cut. Main body 52 and this main body 52
And a screw shaft portion 53 formed integrally therewith.

On the other hand, a disk-shaped block 34a is integrally attached to the rotating part of the disk 34 by a welded joint 34b, and screw holes 54, 55 are continuously formed from the welded block 34a on the center of rotation of the disk 34. The screw shaft portion 53 of the pilot bit 51 is screwed into these screw holes 54 and 55.

Screw shaft portion 53 of these pilot bits 51
The screw grooves of the screw holes 54 and 55 are formed so that the screw shaft portion 53 is screwed into the screw holes 54 and 55 by the rotation of the disk 34 in the direction opposite to the rotation direction.

A spacer 56 as height adjusting means for adjusting the mounting height of the pilot bit 51 is fitted to the screw shaft portion 53 of the pilot bit 51 to connect the block 34a and the main body portion 52 of the pilot bit 51. The spacer 56 is interposed between them.

Therefore, by removing the screw shaft portion 53 of the pilot bit 51 and changing the thickness of the spacer 56, the blade 57 formed on the main body portion 52 of the pilot bit 51 is removed.
The mounting height of the tip 58 of the object 58 to the surface A to be cut can be adjusted to an optimum state according to the hardness of the surface A to be cut.

For example, when the surface A to be cut such as an asphalt road surface is hard, the tip 58 of the blade 57 of the pilot bit 51 is
Is adjusted so as to slightly project from the tip 44 of the surrounding cutting blade 36, the tip 58 of the pilot bit 51 first bites into the surface A to be cut, and the centering action of the pilot bit 51 causes the tip 58 to move to the eccentric position around the periphery. A certain cutting blade 36
The core 34 of the disk 34 can be prevented from being misaligned due to the impact when the blade abuts the surface A to be cut, and stable cutting work can be performed.

That is, with respect to the cutting blade 36 that rotates together with the disk 34, the pilot bit 51 located at the center of rotation of the disk 34 positions the center of the disk 34, and the pilot bit 51 itself is the object to be cut during chipping work. By guiding the horizontal movement of the disk 34 while cutting the surface A, the disk 34
Since it stabilizes the rotation of the cutting blade body 36 and stabilizes the cutting of the cutting blade body 36, compared to the case where the pilot bit 51 is not provided, The swing can be reduced and the seat
The operation of the cutting device 19 has become easier for 15 operators,
You can concentrate on your work. Therefore, smooth movement of the disk 34 can be ensured without requiring delicate operation by a skilled person, and the chiseling work in a stable state can be easily achieved.

The disc 34 is concentrically attached to the tip boss portion 33a of the rotary shaft 33 by a plurality of bolts 59 inserted into the plurality of holes 46 from the lower side of the disc 34. By removing the bolt 59, the disc 34 can be easily replaced, and the cutting blade 36 and the like can be easily maintained.

Next, the pilot bit 51 shown in FIG.
The height adjusting means is a screw-fixing type spacer 56,
The height adjusting means of the pilot bit 51 is not limited to the spacer 56.

For example, the pilot bit 51 is attached so as to be movable in the axial direction within a predetermined range, the pilot bit 51 is projected from the tip end 44 of the cutting blade 36 by a spring (not shown) as height adjusting means, and at the time of working. The retracted pilot bit 51 may be locked by this spring.

Alternatively, the pilot bit 51 may be axially moved by a hydraulic cylinder (not shown) as height adjusting means.

The cutting device 19 and the cutting machine as described above are used for, for example, asphalt road surface repair work, cutting near the joint with the gutter, cutting around the manhole, cutting before and after the highway joint, and other corners. It can be applied to various finishing cuts, etc., and the part left uncut by the load cutter can be cut cleanly, quickly and easily instead of hand breaker work, and cost reduction due to significant labor saving and reduction of man-hours And the work period can be shortened.

The cutting device 19 and the cutting work machine as described above can be applied not only to the cutting of the road surface but also to the cutting of the wall surface. In that case, the rotating surface 35 of the disk 34 is moved in parallel with the wall surface while maintaining a vertical standing posture so as to face the wall surface as the surface A to be cut.

[0046]

According to the first aspect of the present invention, the tips of the plurality of cutting blades respectively mounted on the plurality of concentric circles are located on the plane parallel to the rotation surface on which the cutting blades are mounted. Since the impact load acts evenly on the tips of these cutting blades and the impact load carried by one cutting blade is reduced, the life of the cutting blade due to wear can be extended and The tip of each cutting blade located on a parallel plane can cut the surface to be cut flat. In particular, with multiple cutting blades mounted on multiple concentric circles,
Since a large number of cutting blades can be arranged in a plane on the rotating surface, it is possible to effectively reduce the impact load that one cutting blade bears and to flatten the surface to be cut. Furthermore, the rotating body
Move the rotating body while cutting the surface to be cut at the center of rotation of
By the guide blade that guides, the cutting blade in the eccentric position
Prevents core misalignment of the rotating body due to impact when contacting the quadrant
The rotating body without the need for expert delicate operation.
Of Smoothing's movement can be ensured, the cutting operation of a stable state
You can easily accomplish your work. Especially for the hardness of the surface to be cut
In addition, the height of the guide blade can be adjusted by the height adjustment means.
Can be adjusted to the desired state, making it possible to perform stable cutting work even on hard cutting surfaces.
Can be secured.

According to the second aspect of the present invention, a plurality of cutting blades are provided on a plurality of concentric circles of the rotating surface so as to project obliquely in the rotating direction from the axis perpendicular to the rotating surface, and in the tangential direction of each circle. Since they have different angles with respect to each other, even the cutting blades on the same circle can draw a plurality of rotational trajectories, and can cut the surface to be cut finely and flatly.

[0048] According to the invention of 請 Motomeko 3, wherein the traveling member carrying a cutting apparatus according to claim 1 or 2, wherein until the cutting object surface, the rotation of the cutting device by operating the swing body and working arm member While moving parallel to the surface to be cut, the flat cutting of the surface to be cut can be efficiently performed. Further, the swinging of the revolving body and the working arm body during the cutting work is reduced by the guide blade body, and stable work can be performed.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a cutting device according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a partially cutaway side view showing another embodiment of the cutting device according to the present invention.

FIG. 4 is a side view showing an embodiment of a cutting work machine according to the present invention.

FIG. 5 is a side view of the cutting device attached to the same cutting work machine.

[Explanation of symbols]

A surface to be cut 12 running bodies 14 Revolving structure 18 working arm 19 Cutting equipment 34 Disk as a rotating body 35 surface of revolution 36 cutting blade 51 Pilot bit as guide blade 56 Spacer as height adjustment means

Front page continuation (72) Inventor Kokichi Inoue 3700 Tana, Sagamihara-shi, Kanagawa Seamek Co., Ltd. (56) References JP-A-10-266121 (JP, A) JP-A-9-217316 (JP , A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) E01C 23/12 E01C 23/09 E01C 23/08

Claims (3)

(57) [Claims] 1. A rotating body which is rotationally driven and a rotating surface which is rotated by the rotating body so as to face a surface to be cut.
Mounted on a number of concentric circles, the tip is parallel to the plane of rotation
A plurality of cutting blade located on the plane of the cutting object attached to the rotating center of the rotating surface of the rotating member
A guide blade for guiding movement of the rotating body while cutting the surface, the guide blade switching cutting device you characterized by comprising a height adjusting means for adjusting the mounting height of. 2. The plurality of cutting blades are provided so as to project obliquely from a plurality of concentric circles of a rotating surface in a rotating direction from a vertical axis with respect to the rotating surface, and have different angles with respect to a tangential direction of each circle. The cutting device according to claim 1, which is characterized in that. 3. A traveling body, a revolving body rotatably provided on the traveling body, a work arm body provided on the revolving body and having a plurality of movable members connected thereto, and attached to a tip end portion of the work arm body. A cutting work machine comprising the cutting device according to claim 1 or 2 .