JPH07173804A - Road cutter - Google Patents

Abstract

PURPOSE:To form a corner section slantly and to make it possible to promote work efficiency by reducing the projected length of a plurality of cutting edges to one end lengthwise of a cutter drum successively toward the end. CONSTITUTION:A large number of cutting edges 2... equipped with bits 5... are mounted over lengthwise to the peripheral surfaces 1a and 1a of a cutter drum 1. A plurality of cutting edges 2 to one end lengthwise of the cutter drum 1 are so made that the projected length from the center of the drum 1 of the bits 5 is reduced successively toward one end lengthwise. For that purpose, when an asphalt road is cut, a corner section between the cut surface and asphalt road surface is formed slantly, asphalt constructed in a cutting section is sufficiently adhered in the corner section, and it is not separated. Even if cutting work and paving work are not carried out at the same time, sliding and contacting work is not required, and cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road cutter of a road surface cutting machine for cutting an asphalt road surface or the like.

[0002]

2. Description of the Related Art As a road cutter for a road surface cutting machine, for example, as shown in Japanese Utility Model Publication No. 63-38262, a cutter having a plurality of bits attached to a cutter drum is known.

[0003]

Since the tip of each bit has the same protruding length from the center of the drum, the corner C of the cutting portion B of the asphalt road surface A has a right angle as shown in FIG. For this reason, when asphalt is laid on the cutting portion B, the corner portion C does not adhere sufficiently and is easily peeled off.

If the cutting work and the paving work are not performed at the same time, the road is opened in the cut state, but it is dangerous if there is a step between the uncut adjacent lane and the sidewalk.
As shown in FIG. 1, it is necessary to lay the asphalt D diagonally on the corner portion C so that the corner portion C becomes the diagonal surface E, that is, so-called shaving work.

However, in the case of carrying out this scouring work, the adjacent lane is often open to traffic, which is a dangerous task, and the scoring part is temporary and is torn down prior to the main pavement, resulting in extra cost.

Therefore, an object of the present invention is to provide a load cutter capable of solving the above-mentioned problems.

[0007]

A large number of cutting blades 2 equipped with bits 5 are attached to the outer peripheral surface of a cutter drum 1 in the longitudinal direction, and a plurality of cutting blades 2 near one end in the longitudinal direction of the cutter drum 1 are provided. A load cutter in which the protruding length of the bit 5 from the center of the drum is gradually reduced toward one end in the longitudinal direction.

[0008]

[Operation] When the asphalt road surface is cut, the corner between the cutting surface and the asphalt road surface becomes oblique, so the asphalt laid in the cutting part does not adhere and peel off sufficiently at the corner part, and cutting and paving work Even if they are not performed at the same time, the cost can be reduced by eliminating the need for rub-in work.

[0009]

[Example] As shown in Fig. 2, the cutter drum 1 is formed in a tubular shape, and the outer peripheral surface 1 of the outer peripheral surface thereof is located closer to one end in the longitudinal direction.
A has a tapered shape, and a plurality of cutting blades 2 are attached to the outer peripheral surface of the cutter drum 1. The cutting blade 2 is shown in FIG.
The bit holder 4 is attached to the base plate 3 and the bit 5 is attached to the bit holder 4 as shown in Fig. 4, and each bit 5 of the cutting blade 2 attached to the outer peripheral surface of the circular cutter drum has a protruding length from the center of the drum. Each bit 5 of the cutting blade 2 attached to the outer peripheral surface 1a having the same taper shape
The length of protrusion from the center of the drum is gradually reduced toward the end so as to be substantially tapered.

By doing so, as shown in FIG. 4, the corner portion C of the cutting portion B of the asphalt road surface A is tapered.

FIG. 5 shows a second embodiment of the cutter drum 1.
The end drum 11 is connected to the main body drum 10 by the bolts 12, and the outer peripheral surface 11a of the end drum 11 is tapered and the cutting blade 2 is attached.

In this way, the corner portion can be cut at a right angle by exchanging the end drum 11 with a perfect circular shape.

FIG. 6 shows a third embodiment of the main body drum 10.
The outward flange 12 of the end drum 11 to the outward flange 12 of the
3 is connected by a bolt 14 to form a cutter drum 1, a rotating portion 17 of a speed reducer 16 is connected by a bolt 18 to an inward flange 15 of the main body drum 10, and a motor 20 attached to one support frame 19 is connected to the speed reducer 16. Connect to. At this time, the connecting portion between the outward flange 12 and the inward flange 13, that is, the connecting portion between the main body drum 10 and the end drum 11 is the connecting portion between the inward flange 15 and the rotating portion 17, that is, the connecting portion for driving force transmission in the cutter drum 1. As a neighborhood. A support shaft 22 is attached to the partition wall 21 of the main body drum 10.
The cylindrical body 23 is supported by bearings 24, and the cylindrical body 23 is connected to the other support frame 25 so that the cutter drum 1 is supported between both support frames 19 and 25.

However, the bolt 18 is exposed to the outside by loosening the bolt 14 and removing the end drum 11, and the cutter drum 1 can be easily tightened and loosened.
Can be easily attached to and removed from the support frame.

FIG. 7 shows a fourth embodiment of the cutter drum 1
Is formed into a perfect circular shape, and the thickness of the base plate 3 of the plurality of cutting blades 2 mounted between one end and one end in the longitudinal direction is sequentially reduced so that the protruding length from the drum center of the bit 5 is gradually reduced. I am doing it. In addition, by changing the thickness of the bit holder 4, changing the length and the mounting angle of the bit 5, and changing the mounting position of the cutting blade 2, the projecting length of the plurality of bits 5 from the end portion from the drum center can be successively reduced. You may.

[0016]

[Effects of the Invention] When the asphalt road surface is cut, since the corner portion between the cutting surface and the asphalt road surface becomes oblique, the asphalt laid on the cutting surface is not sufficiently adhered and peeled off at the corner portion, and cutting work and paving Even if the work is not performed at the same time, the rub-in work is unnecessary and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a conventional defect.

FIG. 2 is a sectional view showing the first embodiment of the present invention.

FIG. 3 is a front view of the cutting blade according to the first embodiment.

FIG. 4 is a sectional view of a cutting portion according to the first embodiment.

FIG. 5 is a sectional view of a second embodiment of the present invention.

FIG. 6 is a sectional view of a third embodiment of the present invention.

FIG. 7 is a sectional view of a fourth embodiment of the present invention.

[Explanation of symbols]

1 ... Cutter drum 1a ... Outer peripheral surface, 2 ... Cutting blade, 3 ... Base plate, 4 ... Bit holder, 5 ... Bit, 10 ...
Body drum, 11 ... end drum, 12 ... outward flange,
13 ... Outward flange, 14 ... Bolt, 15 ... Inward flange, 16 ... Reduction gear, 17 ... Rotating part, 18 ... Bolt, 19
… Support frame, 20… Motor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Yoda 1-3 Takaracho, Kashiwazaki City, Niigata Prefecture Komatsu Est Headquarters Factory (72) Inventor Akihiko Tsutake 1-3 Takaracho, Kashiwazaki City, Niigata Prefecture Komatsue Co., Ltd. Strike headquarters factory

Claims (5)

[Claims] 1. A large number of cutting blades 2 equipped with bits 5 are attached to the outer peripheral surface of a cutter drum 1 in the longitudinal direction, and a plurality of cutting blades 2 near one end in the longitudinal direction of the cutter drum 1 are provided. A load cutter in which the length of protrusion from the center of the drum gradually decreases toward one end in the longitudinal direction. 2. The load cutter according to claim 1, wherein the outer peripheral surface 1a of the cutter drum 1 near the one end in the longitudinal direction has a tapered shape. 3. The load cutter according to claim 1, wherein the cutter drum 1 is formed by connecting an end drum 11 having a tapered outer peripheral surface to a main body drum 10 having a perfect circular shape. 4. The cutter drum 1 has a perfect circular shape, the cutting blade 2 is composed of a base plate 3, a bit holder 4 and a bit 5, and the base plate 3 of the cutting blade 2 mounted near the one end of the cutter drum 1 in the longitudinal direction. The load cutter according to claim 1, wherein the thickness is gradually reduced toward one end of the cutter drum 1 in the longitudinal direction. 5. The load cutter according to claim 3, wherein the connecting portion between the main body drum 10 and the end drum 11 of the cutter drum 1 is near the driving force transmitting connecting portion in the cutter drum 1.