JPH10337721A - Cutter for cutting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutter for cutting at high cutting speed by which a cut face is finished as a smooth face without recesses and projections. SOLUTION: A cutter 2 for cutting in which a plurality of diamond chips 9 arranged in the axial direction of a drum 8 at required intervals are arranged by shifting respective faces on a plurality of sites in the peripheral direction is constituted on the outer peripheral face of the drum 8 formed into the cylindrical shape. When the cutter 2 for cutting is pressed on a concrete surface 1 while being fitted on a driving device 3 and rotated at high speed, a plurality of diamond chips 9 on respective lines are in collision with the concrete surface 1 simultaneously all over the comparatively wide range corresponding to the width of of drum 8 to carry out the cutting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting cutter for mainly cutting a concrete surface.

[0002]

2. Description of the Related Art Generally, the surface layer of a concrete surface forming the inner wall of a sewer manhole in a sewerage manhole is corroded and deteriorates with the passage of years. Conventionally, however, the work of cutting the surface layer deteriorated in this way is as shown in FIG.
As shown in FIG. 6, a disc grinder d mounted on a driving device c is used as a cutting cutter with a cup-shaped wheel b having a diamond tip a as a cutting cutter, and a concrete surface e is cut manually by an operator. .

[0003]

However, the entire area of the inner wall of the manhole having a depth of about 6 m for a long period of time while supporting the body in a narrow manhole where a stench and cutting dust are gathered is manually cut. The work to be performed was extremely severe, and the burden on the worker was extremely large, both physically and mentally. Therefore, the cutting work should be mechanized to reduce the burden on the worker and improve the work efficiency. However, even if a cup-shaped wheel b, which has been conventionally used by hand, is used as it is as a cutting cutter of a working machine, the cutting speed is too slow and the working efficiency is poor. It was difficult to finish the surface as a smooth surface without irregularities.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a cutting cutter which has a high cutting speed and can finish a cut surface as a smooth surface without unevenness.

[0005]

According to the present invention, a plurality of diamond chips arranged at a predetermined interval in the axial direction of the drum are provided at a plurality of circumferential positions on an outer peripheral surface of a cylindrical drum. In which the cutting cutters are arranged in a shifted manner.

When the thus-cut cutting cutter is mounted on a driving device and pressed against a cutting surface such as a concrete surface while rotating at a high speed, a relatively wide range corresponding to the width of the drum is obtained. When a plurality of diamond chips in each row collide with the surface to be cut at the same time, cutting is performed, so the time required to cut and finish a predetermined area is short, and when a conventional cup type wheel is used as a cutting cutter The cutting speed is improved as compared with the case of FIG.

Further, in a predetermined range corresponding to the width of the drum, since the diamond chips are cut at an equal depth, the cut surface is finished as a smooth surface without unevenness.

Further, in the case of the cutting cutter using a diamond tip as described above, the cutting can be easily performed with a light load by rotating at a high speed. When used as a cutting cutter of a work machine, a large power is not required and a strong support structure is not required, and the apparatus can be implemented with a relatively compact apparatus configuration.

It is preferable that the rows of the diamond chips are spaced apart without overlapping each other when viewed from the axial direction of the drum, so that the diamond chips are caught on the surface to be cut. As a result, the diamond chips can easily bite into the surface to be cut, and the cutting efficiency of the surface to be cut by each diamond chip is improved.

[0010] Further, it is preferable that the phases of the diamond chips in each row are shifted so as to be continuous spirally in the circumferential direction of the drum. Since the ensured gap also continues in a spiral shape in the circumferential direction of the drum, the cutting chips that cut the surface to be cut through the spirally continuous gap will be satisfactorily discharged. The cutting efficiency of the surface to be cut by the diamond tip is further improved.

In the case where the surface to be cut is a curved surface, it is preferable to attach a crown corresponding to the curvature of the surface to be cut to the drum. It is possible to obtain a cutting surface.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show an embodiment of the present invention. In the drawings, reference numeral 1 denotes a concrete surface (cutting target surface) forming an inner wall of a manhole, and 2 denotes a cutting surface for cutting the concrete surface 1. Reference numeral 3 denotes a driving device on which the cutting cutter 2 is mounted, and the driving device 3 is supported by a support arm or the like of a working machine (not shown) so as to be capable of moving forward and backward with respect to the concrete surface 1.

Here, the driving device 3 is constituted by, for example, an electric motor or the like, and its output shaft 4
The torque is transmitted to a drive shaft 7 of the cutting cutter 2 through a motor 6.

The cutting cutter 2 will be described in detail below. The cutting cutter 2 is provided at a plurality of positions in the circumferential direction on the outer peripheral surface of the cylindrical drum 8 (in the illustrated example, the circumferential direction of the drum 8). (Every 30 °), a plurality of diamond chips 9 arranged at a predetermined interval in the axial direction of the drum 8 are arranged with their phases shifted from each other.
Each of the diamond chips 9 is formed by sintering a mixture of a diamond and an alloy in a powder state,
It is manufactured as a sintered block having a rectangular cross section that is curved along the outer peripheral surface of the drum 8 and extends in the circumferential direction, and is fixed to the outer peripheral surface of the drum 8 by brazing.

Particularly, in this embodiment, the rows of the diamond chips 9 are arranged slightly apart without overlapping each other when viewed from the axial direction of the drum 8 (see FIG. 2). Each of the diamond chips 9 in the row is shifted in phase so as to be spirally continuous in the circumferential direction of the drum 8 (see FIGS. 1 and 4).
The drum 8 is provided with a crown corresponding to the curvature of the concrete surface 1 forming the inner wall of the manhole (FIG. 3).
reference).

In the figure, reference numeral 10 denotes a drum 8 and a drive shaft 7.
And a key for restricting both of them so that they can rotate together.

When the cutting cutter 2 constructed as described above is pressed against the concrete surface 1 while being rotated at a high speed by the drive unit 3, a plurality of rows of the plurality of rows are formed over a relatively wide range corresponding to the width of the drum 8. Diamond chip 9 collides with the concrete surface 1 at the same time to perform the cutting, so that the time required for cutting and finishing a predetermined area is short, and compared with the case where the conventional cup-shaped wheel is used as the cutting cutter 2. As a result, the cutting speed is improved.

Further, since a predetermined range corresponding to the width of the drum 8 is cut by the diamond chips 9 at an equal depth, the cut surface is finished as a smooth surface without unevenness.

Further, in the case of the cutting cutter 2 using the diamond tip 9 as described above, the cutting can be easily performed with a light load by rotating at a high speed.
The torque and supporting reaction force required for the cutting operation are small, and when used as the cutting cutter 2 of the working machine, the driving device 3 having a large horsepower and a robust support structure are not required, and the device configuration is relatively compact. It is possible to implement in.

Also, in this embodiment, in particular, the rows of diamond chips 9 are arranged so as to be spaced apart without overlapping each other when viewed from the axial direction of the drum 8, so that each diamond chip 9 The diamond chips 9 can be caught and the respective diamond chips 9 can easily bite into the concrete surface 1, and the cutting efficiency of the concrete surface 1 by each diamond chip 9 is improved.

The diamond chips 9 in each row
Are shifted in phase so as to be spirally continuous in the circumferential direction of the drum 8, so that the gaps secured between the diamond chips 9 in each row are also spirally continuous in the circumferential direction of the drum 8. In other words, the chips generated by cutting the concrete surface 1 through the spiral-shaped continuous gap are satisfactorily discharged, and the cutting efficiency of the concrete surface 1 by each diamond chip 9 is further improved.

Furthermore, since a crown corresponding to the curvature of the concrete surface 1 forming the inner wall of the manhole is attached to the drum 8, it is possible to obtain a cut surface along the curved surface of the concrete surface 1.

Therefore, according to the above embodiment, the cutting speed can be improved as compared with the case where the conventional cup-shaped wheel is used as the cutting cutter 2, so that the working efficiency can be greatly improved. Moreover, the cut surface can be finished as a smooth surface without unevenness.

Further, when used as a cutting cutter 2 of a working machine, it can be implemented with a relatively compact device configuration, so that the mechanization of the cutting work can be easily realized even in a narrow work site such as a sewer manhole. be able to.

Furthermore, by arranging the rows of diamond chips 9 so as to be spaced apart without overlapping each other when viewed from the axial direction of the drum 8, each diamond chip 9 can be easily bitten on the concrete surface 1. As a result, the cutting efficiency of the concrete surface 1 by each diamond tip 9 can be greatly improved.

The diamond tips 9 in each row
Are shifted in phase so as to be spirally continuous in the circumferential direction of the drum 8, so that the chips obtained by cutting the concrete surface 1 can be satisfactorily discharged, and the cutting of the concrete surface 1 by each diamond chip 9 can be performed. Efficiency can be further improved.

Further, by attaching a crown corresponding to the curvature of the concrete surface 1 forming the inner wall of the manhole to the drum 8, a cut surface along the curved surface of the concrete surface 1 can be obtained. At the time of repair work after cutting is completed, a repair layer having a uniform thickness and a uniform strength can be formed.

The cutting cutter of the present invention is not limited to the above-described embodiment, but can be used for cutting concrete surfaces other than the inner walls of manholes, bricks, stones, and the like. It goes without saying that various changes can be made without departing from the spirit of the invention.

[0030]

According to the cutting cutter of the present invention described above, the following various excellent effects can be obtained.

(I) According to the first aspect of the present invention, the cutting speed can be improved as compared with the case where the conventional cup type wheel is used as a cutting cutter, so that the working efficiency is greatly increased. The cutting surface can be finished as a smooth surface without unevenness.

(II) According to the first aspect of the present invention, when used as a cutting cutter of a working machine,
Since it can be implemented with a relatively compact device configuration, mechanization of the cutting operation can be easily realized even in a narrow work site such as a sewer manhole.

(III) According to the second aspect of the present invention, each diamond chip can be easily bitten into the surface to be cut, and the cutting efficiency of the surface to be cut by each diamond chip can be greatly improved. can do.

(IV) According to the invention of claim 3 of the present invention, it is possible to satisfactorily discharge the swarf obtained by cutting the surface to be cut, and to further improve the cutting efficiency of the surface to be cut by each diamond tip. can do.

(V) According to the invention described in claim 4 of the present invention, a cut surface along the curved surface of the surface to be cut can be obtained, so that after the surface layer of the surface to be cut has been cut, repair work is performed. In this case, a repair layer having a uniform thickness and a uniform strength can be formed.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating an example of an embodiment of the present invention.

FIG. 2 is a view in the direction of arrows II-II in FIG.

FIG. 3 is a view in the direction of arrows III-III in FIG. 2;

FIG. 4 is a development view showing an arrangement state of the diamond chips of FIG. 1;

FIG. 5 is a side view showing a conventional example.

6 is a view in the direction of arrows VI-VI in FIG. 5;

[Explanation of symbols]

 1 Concrete surface (surface to be cut) 2 Cutting cutter 8 Drum 9 Diamond chip

Claims (4)

[Claims] 1. A plurality of diamond chips arranged at a plurality of positions in a circumferential direction on an outer peripheral surface of a cylindrical drum at predetermined intervals in an axial direction of the drum, and are arranged with their phases shifted from each other. And cutting cutter. 2. The cutting cutter according to claim 1, wherein the rows of diamond chips are spaced apart without overlapping each other as viewed from the axial direction of the drum. 3. The cutting cutter according to claim 1, wherein the phases of the diamond chips in each row are shifted so that each of the diamond chips is spirally continuous in the circumferential direction of the drum. 4. The cutting cutter according to claim 1, wherein the drum has a crown corresponding to the curvature of the surface to be cut.