JP2010248871A - Drum-shaped type cutter unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter unit capable of reducing weight and cost by forming the cutter unit in such a way as to cut a wide width even if reducing the number of cutting blades. <P>SOLUTION: The cutting blades 3 are formed by fixing cutting tips 2 at equal intervals in a circumferential direction on the outer periphery of a metal disc 1. The cutting blades 3 are plurally arranged in a drum shape coaxially with a rotary shaft 5. The rotary shaft 5 is connected to a driving part 6a of a cutting machine 6. The cutting blades 3 are arranged on the rotary shaft 5 at equal intervals and in a same inclined state as the axis direction of the rotary shaft 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a drum-type cutter unit, and more particularly to a drum-type cutter unit that is used by being attached to a cutting machine that cuts a surface layer such as a road surface or a floor surface.

Conventionally, as this type of apparatus, there is one described in Patent Document 1, for example.
In this conventional product, a chip is provided on the outer periphery of the disk, a plurality of disks are stacked concentrically by contacting the side surface of the chip, a rod is passed through this disk, and the disk is integrated by tightening with nuts from both ends of the rod. It is what.

  Thus, in the case of this conventional product, the thickness of the polymerized disk becomes the cutting width. Therefore, when expanding the cutting width with this conventional product, it is usually necessary to increase the number of discs. According to this, the weight increases as the number of discs increases, and the driving force of the cutting machine increases. In addition, there is a problem in that the cost is increased due to a decrease in transportability and operability.

JP 2009-57825 A

The present invention has been proposed in view of such problems of conventional products.
Therefore, the technical problem to be solved by the present invention is wide even if the number of cutting blades is reduced in a drum-type cutter unit which is formed in a drum shape with a plurality of concentric disk-shaped cutting blades. An object of the present invention is to provide a drum-type cutter unit that is formed so as to be able to cut the width, and that can be reduced in weight and cost.

The present invention employs the following technical means in order to solve the above problems.
That is, according to the present invention, as shown in FIG. 1 and the like, cutting tips 2 are fixed to the outer peripheral portion of a metal disk 1 at equal intervals in the circumferential direction to form a cutting blade 3, and the cutting blade 3 rotates. A plurality of drums having the same shaft center as the shaft 5 are provided, and the rotary shaft 5 is connected to the drive unit 6a of the cutting machine 6, and the cutting blade 3 includes the cutting blade 3 described above. The rotary shaft 5 is provided at equal intervals and inclined with respect to the axial direction of the rotary shaft 5 (claim 1).

  Here, examples of the cutting tip 2 include a diamond tip and a cemented carbide tip. In addition, here, the same tilt state means that the tilt angle and the tilt direction are the same. In this case, the inclination angle of the cutting blade 3 may be selected as appropriate. In the present invention, the larger the inclination angle, the larger the cutting width by one cutting blade 3, and a wider width can be cut with a smaller number of sheets.

Thus, in the case of the present invention product, among the cutting blades arranged in parallel with the rotating shaft, the cutting blade at the end is subject to a larger load than other cutting blades when the moving direction of the cutting machine changes, for example. It is. Therefore, conventionally, in the case of this type of apparatus, the cutting tips of the cutting blades at both end portions are more easily worn than the cutting tips of other cutting blades, and as a result, the cutting blade at this position is frequently replaced. There was a problem that.
The present invention according to claim 2 intends to solve such problems.

That is, according to the second aspect of the present invention, as shown in FIG. 1 and the like, the cutting blades 3a at both end portions in the axial direction of the rotating shaft 5 are perpendicular to the rotating shaft 5 and adjacent to the inner side. It is characterized by being provided in contact with the cutting blade 3.
In this case, the cutting blades 3a at both ends may have the same structure and the same type as the other cutting blades 3, but the present invention is not limited to this.

  In the present invention, as shown in FIG. 1, FIG. 4, and the like, adjacent cutting blades 3 are arranged in the groove-like portion 4 between the cutting tips 2 of one cutting blade 3 and the other cutting blade 3. Preferably, the cutting tip 2 is provided with a position shifted in the circumferential direction in a state in which the center position in the circumferential direction is made to correspond (Claim 3).

  Because of this, it is possible to prevent scraps during cutting from being scattered in the lateral direction by the cutting tip 2 of the adjacent cutting blade 3, and to scrape and discharge the cutting scraps in an orderly manner between the cutting blades 3, and the road surface, etc. This is because the biting of the cutting blade 3 into the surface is improved.

In the present invention, the cutting blade is thus provided at an equal interval with respect to the rotating shaft and inclined in the same inclined state with respect to the axial direction of the rotating shaft.
Therefore, in the case of the present invention, since the cutting blade performs cutting while rotating in a meandering manner, the cutting width of one cutting blade extends beyond the thickness of the cutting blade in the axial direction of the rotating shaft.
Therefore, according to this, even if the number of cutting blades is reduced, a wide width can be cut, and accordingly, the weight can be reduced, the transportability and operability can be improved, and the cost can be reduced.

A is a principal part front view which shows suitable one Embodiment of the cutter unit of this invention, B is a side view of a cutting blade. It is a disassembled perspective view of a cutter unit same as the above. It is a perspective view of a cutting machine. It is a perspective view of a cutter unit same as the above. It is a principal part enlarged front view of a cutter unit same as the above.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment for carrying out the invention will be described with reference to the accompanying drawings.
As shown in FIG. 1 and the like, the present invention is provided with a plurality of cutting blades 3 in which cutting tips 2 such as diamond chips are fixed at equal intervals in the circumferential direction on the outer periphery of a metal disc 1. It is formed in a drum shape. In the case of this embodiment, the cutting tip 2 is formed on the outer peripheral portion of the disk 1 over a certain length in the circumferential direction, and is formed intermittently with the groove-like portion 4 being opened. The outer diameter of each cutting blade 3 is the same.

The cutting blade 3 is provided on the rotary shaft 5 with the same axis center and at equal intervals, and is inclined in the same inclined state with respect to the axial direction of the rotary shaft 5. The rotating shaft 5 is connected to the drive part 6a of the cutting machine 6 (refer FIG. 3).
In this embodiment, the cutting machine 6 includes a pair of left and right wheels 6b, an operation handle 6c, and the like.

  Further, according to the present invention of this embodiment, the cutting blades 3 a at both end portions in the axial direction of the rotating shaft 5 are provided so as to be orthogonal to the rotating shaft 5 and in contact with the adjacent inner cutting blade 3. . The cutting blades 3a at both ends have the same structure and the same type as the other cutting blades 3.

  A hole 7 through which the rotary shaft 5 passes is formed at the center of the cutting blades 3 and 3a. In addition, the cutting blades 3 and 3a have a small hole 8 formed in a penetrating manner at a position 90 degrees from the center and at an equal distance from the center. As shown in FIG. 2, one end of the rotating shaft 5 is fixed to a disk-shaped holder 9, and the base end of the long screw 10 is 90 degrees around the center of the holder 9 on the inner surface of the holder 9. Four of them are fixed in parallel with the rotating shaft 5. This long screw 10 is passed through the small holes 8 of the cutting blades 3 and 3a to support the cutting blades 3 and 3a, and the tip portion thereof is formed in a male screw shape over a certain length.

  As shown in FIGS. 1 and 4, the cutting blades 3 a at both ends are provided in contact with the adjacent inner cutting blade 3 via a taper spacer 11. As shown in FIG. 2, the taper spacer 11 is formed with a hole 11a and a small hole 11b similar to the hole 7 and the small hole 8 formed in the cutting blades 3 and 3a, and the hole 11a and the small hole 11b. The taper spacer 11 is fitted and inserted into the rotary shaft 5 and the long screw 10 via the screw. Further, the inner surface of the taper spacer 11 is inclined by a predetermined angle with respect to the axis of the rotating shaft 5 and is formed in an inclined surface shape. The inclination angle of the cutting blade 3 is determined by the angle of the inclined surface of the taper spacer 11.

  An annular spacer 12 is sandwiched between the cutting blades 3. The annular spacer 12 is fitted and inserted into the long screw 10, and both side surfaces thereof are formed as inclined surfaces having the same angle as the inner surface of the tapered spacer 11 with respect to the axis. Each cutting blade 3 is held at a constant interval in an inclined manner by the annular spacer 12, and torsion and vibration during rotation are prevented.

  As shown in FIGS. 1, 4, etc., a disk-like side plate 13 is fitted and inserted into the distal end side of the long screw 10, and a nut 15 is screwed onto the distal end portion of the long screw 10 via the stopper plate 14. And each component is tightened. As a result, the cutting blade 3 is tilted with respect to the rotating shaft 5 in the same inclined state, and the cutting blade 3a at the side end is provided perpendicular to the rotating shaft 5, and is formed in a drum shape as a whole. Is.

  Thus, in the case of this embodiment, adjacent cutting blades 3, 3a are formed in a groove shape between the cutting tips 2 of one of the cutting blades 3, 3a as shown in FIGS. The part 4 is provided with a position shifted in the circumferential direction in a state in which the center position in the circumferential direction of the cutting tip 2 of the other cutting blade 3, 3 a is associated. Thus, the product of the present invention can be cut reliably by cutting the cutting chips 2 alternately into the road surface or the like without scattering the cutting waste from the groove-shaped portion 4 to the side.

In the case of this embodiment, as shown in FIG. 5, the interval between the adjacent cutting blades 3 is a perpendicular line L (a line perpendicular to the axial direction of the rotating shaft 5) in contact with the upper inner end of the cutting blade 3 in front view. L) is formed so as to pass through the center of the thickness of the adjacent cutting blade 3.
Therefore, in this embodiment, the width W1 that is half the thickness of the cutting blade 3 is cut by the adjacent cutting blades 3 in an overlapping manner. Therefore, according to this, it is possible to prevent uncut portions at the boundary between the cutting blades 3 in a state where the width of the overlapping cutting is suppressed.

Next, the operation of the present invention will be described.
The product of the present invention is used by connecting a rotary shaft 5 (see FIG. 4 and the like) to a drive unit 6a of a cutting machine 6 that cuts a surface such as a road surface as shown in FIG.

  When the drive unit 6a of the cutting machine 6 rotates, the rotational force of the drive unit 6a is transmitted to the rotary shaft 5 and the product of the present invention rotates. In this case, since each cutting blade 3 is provided in an inclined shape, the cutting blade 3 rotates in a meandering manner (swinging shape), and along the axial direction of the rotary shaft 5 as shown in FIG. Cutting the range of the cutting width W.

Further, in the product of the present embodiment of this embodiment, the cutting blade 3 a at the side end is provided orthogonal to the axial direction of the rotating shaft 5. Therefore, the cutting blade 3a at the side end cuts the road surface or the like by the width of the cutting blade 3a (in this embodiment, the widths of the cutting tip 2 and the cutting blade 3a are the same).
Therefore, when the product of the present invention rotates, the road surface and the like are cut by the length that the cutting blades 3, 3 a occupy in the axial direction of the rotary shaft 5.

  In the case of the present invention product, the cutting blade 3a at the side end is provided orthogonal to the axial direction of the rotating shaft 5 as described above. Cutting is possible with low resistance.

  Therefore, according to the product of the present invention, even when the cutting machine 6 changes direction, for example, it becomes easy to adapt and respond to the moving direction of the cutting machine 6. In addition, since it is possible to suppress wear of the cutting tip 2 as compared with the case where the cutting blade 3 is inclined to the side end portion, according to the present invention, the replacement cycle of the cutting blade 3a at the side end portion accordingly. Can be long.

DESCRIPTION OF SYMBOLS 1 Disc 2 Cutting tip 3 Cutting blade 5 Rotating shaft 6 Cutting machine 6a Drive part

Claims (3)

  Cutting tips are fixed to the outer periphery of a metal disk at equal intervals in the circumferential direction to form a cutting blade. A plurality of cutting blades are provided in the form of a drum with the same axis as the rotation axis. A drum-type cutter unit in which a shaft is connected to a drive unit of a cutting machine, wherein the cutting blade is equidistant from the rotating shaft and is in the same inclined state with respect to the axial direction of the rotating shaft A drum-type cutter unit, characterized in that it is provided at an angle.   2. The drum-type cutter unit according to claim 1, wherein the cutting blades at both end portions in the axial direction of the rotating shaft are provided orthogonal to the rotating shaft and in contact with the adjacent cutting blades. Drum-type cutter unit characterized by   The drum-type cutter unit according to claim 1 or 2, wherein adjacent cutting blades are provided in a groove-like portion between the cutting tips of one cutting blade, and in the circumferential direction of the cutting tip of the other cutting blade. A drum-type cutter unit, characterized in that the center position is shifted in the circumferential direction in a state in which the center positions in the drum are matched.

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