JP3308351B2 - Paving cutting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement cutting method for a trial excavation work on a pavement road or a cutting and removing work around a road occupation material such as a manhole.

[0002]

2. Description of the Related Art In a trial work for a pavement road, a pavement is cut into a square or a circular closed shape, and the pavement is crushed or removed integrally. In the repair work for road occupation materials such as manholes, the pavement around the manhole was cut into a square or circular closed shape, and the pavement was removed.

[0003] When a pavement is cut into a circle, the pavement is cut with a cylindrical bit or by moving a disk-shaped blade in a circular shape. However, when cutting with a disk-shaped blade into a shape having corners such as a square, FIG.
As shown in (B), since the positions of the blades of the disk-shaped blade 3 are different between the pavement surface and the deep part, it was not possible to cut uniformly from the surface to the deep part. In order to cut to the required depth to the bottom of the pavement, the pavement surface must be cut beyond the corner 4, resulting in a notch 6 as shown in FIG.

[0004] The margin 6 can close the opening of the pavement surface by finishing and repairing, but it is not aesthetically pleasing, and it also allows rainwater to enter the interior of the pavement and lowers the supportability of the pavement. Cause problems.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent cutting off pavement at a corner when the pavement is cut and removed by a disk-shaped blade into a closed shape having a corner.

[0006]

When the pavement is cut and removed into a closed shape having a corner, the pavement surface is cut into a required shape with a disk-shaped blade, and the corner is shaped with a chisel having the same shape as the corner. Uncut portions to the required depth were cut off so that no pavement was formed on the pavement surface.

[0007]

The straight section of the cutting line can be cut to the required depth by a disk-shaped blade, and the corners are cut to the required depth by a chisel conforming to the shape. Can be cut.

[0008] The cut pavement is, for example, Japanese Patent Publication No. 61-2
No. 5,844, JP-B-61-33938, or JP-B-63-55562,
Crush or lift and remove.

[0009]

1A is a plan view showing a square cutting line, FIG. 1B is a sectional view at the time of cutting by a disk-shaped blade, FIG.
(C) is a cross-sectional view of a state where the corner is cut by a chisel,
(D) is a perspective view of the chisel.

The straight section 2 is cut with a disk-shaped blade 3,
The corner 4 is cut by applying vibration to the chisel 5 shown in FIG. The chisel 5 includes bent blades 6 arranged at right angles to the shape of the corners 4. The straight portion 2 is cut by the disc-shaped blade 3 so that the tip of the disc-shaped blade 3 does not exceed the corner 4 on the pavement surface, as shown by oblique lines in FIG. Therefore, a portion not reaching the required cutting depth remains near the corner 4. Next, as shown in FIG. 1 (C), a chisel 5 shown in FIG. 1 (D) is attached to a breaker at an uncut portion and pushed by vibration to cut the corner 4 to a required depth.

[0011]

According to the present invention, the pavement is cut to a required depth by a disk-shaped blade, and an uncut portion of the corner is cut to a required depth by a chisel having the same shape as the corner, so that no extra cutting occurs and the appearance of the pavement surface is beautiful. And does not reduce the strength of the pavement.

[Brief description of the drawings]

1A and 1B show a pavement cutting method according to an embodiment, in which FIG. 1A is a plan view, FIG. 1B is a cross-sectional view at the time of cutting with a disk-shaped blade,
(C) is a sectional view at the time of cutting a corner, and (D) is a perspective view of a chisel.

2A and 2B show a conventional pavement cutting method, in which FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view at the time of cutting by a disk-shaped blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pavement 2 Straight part 3 Disc-shaped blade 4 Corner part 5 Chisel 6 Bending blade

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Tsubakimori 1-1-1 Minami-Dainichicho, Kanshuji-ji, Yamashina-ku, Kyoto-shi, Kyoto EPO Co., Ltd. (56) References JP-A-62-125109 (JP, A) Japanese Patent Publication 2-15686 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01C 23/09 E02D 29/12 B26D 3/12 B26D 3/10

Claims (1)

(57) [Claims] When a pavement is cut and removed into a closed shape having a corner, the pavement surface is cut into a required shape with a disk-shaped blade, and an uncut portion of the corner is cut with a chisel having the same shape as the corner. A pavement cutting method that cuts to the required depth.