JPH04219212A - Cutter blade - Google Patents

Abstract

PURPOSE:To improve operating efficiency by forming a comparatively wide ditch such as a melted snow ditch to a concrete surface, etc., through one-time cutting process. CONSTITUTION:The outer circumferential end section of a rotating substrate 6 is formed thickly while cutting chips 10 wide in the circumferential direction are disposed and fixed onto an outer circumferential surface 8 at regular intervals, and front end faces 10a in the direction of rotation of the cutting chips 10 have an inclination of theta deg. in the axial direction of the rotating substrate 6.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a cutter blade used for forming grooves in concrete surfaces, etc.
Specifically, the present invention relates to a cutter blade suitable for forming a relatively wide groove of 10 mm or more, particularly a snow melting groove as a drainage groove for melted snow water.

0002

2. Description of the Related Art The size of snow melting grooves is specified by the Japan Highway Public Corporation, and as shown in FIG. 5, the width W is 50 mm and the depth D is 40 mm. Snow melting groove G like this
For example, when forming on concrete surface C, conventionally,
A cutting tip having a width of about 3 mm, which is slightly thicker than the thickness of the rotating substrate, is fixed to the outer peripheral surface of a disk-shaped rotating substrate having a substantially uniform thickness. When forming the snow melting groove G with such a cutter blade, first, both ends of the snow melting groove to be formed are cut to form a groove 50 corresponding to the width N of the cutting tip, and the core portion 52 remaining in the center is cut. This is done by crushing it with an air breaker etc. and removing it.

0003

[Problems to be Solved by the Invention] Incidentally, in the conventional method as described above, the core must be crushed and removed, but after the core has been removed, the removal surface 54 is removed by cutting with a cutting tip. It has a rough surface with many undulations compared to the surface, and it is prone to deterioration due to water intrusion as well as reduced drainage performance. Therefore, surface treatment such as applying an emulsion or the like to the removal surface 54 is required.

In addition to such surface treatment, at least two narrow grooves must be formed, and after the grooves are formed, the core must be removed, etc.
This resulted in a large number of work processes and complexity.

Therefore, the present invention makes it possible to form wide grooves such as snow melting grooves with a small amount of work, and also to obtain a smooth cut surface, improving work efficiency and improving drainage performance without requiring any effort such as surface treatment. The purpose is to provide a cutter blade that can improve the

[0006]

[Means for Solving the Problems] This invention was devised to achieve the above object, and its features include a hole for mounting the drive shaft in the center and a thick outer peripheral end. and a cutting tip fixed to the outer peripheral surface of the rotary substrate at intervals in the circumferential direction and having at least a tip end face in the rotational direction of the rotary substrate inclined with respect to an axial direction of the rotary substrate. It is in the configuration provided.

[0007]

According to the present invention, by making the width of the cutting tip equal to the width of a wide groove such as a snow melting groove, the snow melting groove can be formed in one cutting operation. The tip of the cutting tip in the rotational direction is inclined with respect to the axial direction, so
The cutting load in the rotational direction is eased, and an increase in cutting resistance caused by making the snow melting groove etc. wide enough to be cut at one time is avoided. Further, since the tip end surface of the cutting tip is constantly in contact with the work material such as a concrete surface, vibrations are reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 4 show an embodiment of the present invention, which is applied to a snow melting groove.

The cutter blade 2 for forming the snow melting groove G has a drive shaft (not shown) of the cutter device in the center.
a rotating board 6 having a mounting hole 4 for mounting on the rotating board 6;
It is generally composed of a plurality of cutting tips 10 fixed at equal intervals in the circumferential direction on the outer peripheral surface 8 of.

The rotating board 6 includes, for example, two disks 12.
, 14 can be used. Reference numeral 15 indicates a fastening bolt between both disks 12 and 14. A mounting portion 16 that protrudes in the axial direction together with the mounting hole 4 for the drive shaft is formed at the center of the rotating board 6, and a basic thickness portion 18 having a constant thickness t1 is formed from the center to the vicinity of the outer circumference. has been done. A thick wall portion 20 is formed at the outer peripheral end portion, the thickness of which gradually increases in the radial direction of the rotary substrate 6, and has a final thickness t2 that approximates the width of the cutting tip 10. Note that the reference numeral 22 indicates a hole for a fixing screw in the collar member.

The cutting tip 10 is formed by sintering ultra-hard abrasive grains such as diamond grains or cubic boron nitride grains through a binder, and cuts the snow melting groove G in one cutting process, that is, The effective cutting width t3 is 50 mm in order to form the concrete surface C only by cutting to a depth of 40 mm and then moving the cutter device body a predetermined distance.
It is set to mm.

Further, the distal end surface 10a in the rotational direction (direction of arrow R) is inclined by θ° with respect to the axial direction. In this example, the inclination angle θ is 27°30'
The width t4 in the direction perpendicular to the tip surface 10a is approximately 10 mm.
It is said that The radial thickness t5 is about 9 mm, of which 2 mm is embedded in the outer circumferential surface 8.

Further, the cutting tip 10 is formed into a shape having a substantially parallelogram plane, and the acute angle portion 10b improves the cutting performance at the initial stage of cutting. In this case, since there is an acute angle portion 10b on the opposite side of the diagonal line, forward and reverse rotation is supported.

[0014] With the above configuration, the snow melting groove G
can be formed in a single cutting process. That is, the cutting tip 1 is attached to the rotary substrate 6 by the thick portion 20.
The tip surface 10a of the cutting tip 10 is guaranteed to have an adhesion strength of 0.
has an inclination, the effective cutting width t3 is reduced to 50
The increase in cutting resistance due to the width of mm is alleviated. In other words, for this type of cutter blade, in order to maintain a certain level of cutting efficiency, the effective cutting width t3 must be 10 m.
m is the upper limit, and if it exceeds the limit, the cutting efficiency will be extremely reduced or cutting will not be possible, but the cutting resistance is reduced by the inclination of the tip surface 10a.

[0015] Therefore, the snow melting groove G that conforms to the standards can be formed in a single cutting process, and all surfaces are smooth cut surfaces, so surface treatment with emulsion etc. is not necessary, and work efficiency is improved. It is possible to obtain a significant improvement in water and drainage performance.

Further, the cutter blade 2 shown in this example has a structure having a water cooling function. That is, Figure 2
As is clear from FIG. 3, an annular groove 24 is formed in the center of the rotating board 6 and communicates with the mounting hole 4, and a radial water supply channel 26 communicates with the annular groove 24 and extends in the radial direction.
is formed. An annular water supply channel 28 is formed in the thick portion 20 so as to communicate with the radial water supply channel 26 , and each cutting tip 01 communicates with the annular water supply channel 28 .
A discharge port 30 that opens between the two is formed.

Water L is sent from the water supply source to the annular groove 24 of the rotary substrate 6 via the drive shaft (this is omitted as it is a known technique).
The water reaches the annular water supply channel 28 via the radial water supply channel 26 and is ejected from the discharge port 30. The jetting of water L suppresses thermal deterioration of the cutting tip 10 due to frictional heat, promotes discharge of cutting waste, and improves cutting efficiency. Of course, other than water L, a cooling fluid such as air can also be used. Further, cutting waste can be efficiently processed by utilizing the technology disclosed in Utility Model Application No. 1-83005 and Utility Model Application No. 1-128038 by the present applicant.

In this example, the specific shape and specific inclination of the cutting tip 10 are shown, but the present invention is not limited to these, and various other shapes can be adopted as long as cutting efficiency can be maintained without any problems.

[0019]

[Effects of the Invention] According to the present invention, wide grooves such as snow melting grooves can be formed in a single cutting process without causing problems due to an increase in cutting resistance, and all the forming surfaces are smooth. Since it becomes a cutting surface, it is possible to significantly improve work efficiency and reduce work costs, and it is also possible to improve drainage performance of the groove.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a cutter blade according to the present invention in a used state.

FIG. 2 is a schematic sectional view of an embodiment of a cutter blade according to the present invention.

FIG. 3 is a partially schematic side view of an embodiment of the cutter blade according to the present invention.

FIG. 4 is a partial plan view showing the arrangement of cutting tips in one embodiment of the cutter blade according to the present invention.

FIG. 5 is a perspective view showing how snow melting grooves are formed in the prior art.

[Explanation of symbols]

4 Mounting hole 6 Rotating board 8 Outer surface 10 Cutting tip 10a Tip surface 20 Thick wall part (outer edge)

Claims (1)

[Claims] Claims: 1. A rotary substrate having a hole for attaching to a drive shaft in the center and having a thick outer circumferential end; A cutter blade comprising: a cutting tip whose distal end surface in the rotational direction of the rotary substrate is inclined with respect to the axial direction of the rotary substrate.