JPS62125109A - Circular road surface cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a circular road cutter that is effective for cutting concrete or asphalt on road surfaces, particularly for cutting road surfaces around manholes and the like.

(Prior Art) Conventionally, when cutting the road surface around a manhole or the like, a straight cutter was used to cut the road surface in a U-shape so as to surround the manhole, as shown in FIG. For this reason, cutting marks remain on the outside of the tile, so there are drawbacks such as the cutting marks and the corners being unable to be filled in neatly when filling concrete or asphalt for later filling.

(Problems to be Solved by the Invention) The present invention eliminates unnecessary cutting marks that occur when cutting the road surface around manholes, etc.
Another object of the present invention is to provide a road cutter capable of achieving a beautiful finish in asphalt embedding work.

(Means for Solving the Problems) The present invention connects a rotating shaft 7 via a connecting bearing 5 to the tip of a connecting rod 3 whose rear end is supported by a universal joint 2 rotatably attached to a fixed member, for example, a base plate 1. A rotatable spherical cutter 8 is attached to the tip of the rotary shaft 7, which is connected to the rotary shaft 7 and supported by the road cutter main body 4, and is rotated by a power source 6 such as an engine or a motor provided in the road cutter main body 4. This is a circular road cuffer characterized in that a support wheel 16 is provided on the road cutter main body 4 so that the spherical cutter 8 can be moved downward during work, thereby making it possible to cut into the road surface.

(Function) In the present invention, the spherical cuffer 8 that cuts the road surface rotates around a swivel bearing 2 that is rotatably attached to the center of a frame-shaped or plate-shaped substrate 1, and the spherical cutter 8 can be rotated freely. Since the curvature has the same radius as the distance from the joint 2, it can be cut into a circle. Furthermore, the deeper the cut surface of the concrete or asphalt is, the more it is cut in an arc shape toward the inside of the circle as shown in FIG. 1, making it easier to remove the concrete or asphalt inside the circle.

(Embodiment) In the present invention, for example, after a substrate 1 of the same size as a manhole cover is placed over a hole in the manhole 14, a manhole fixing bolt 15 is fixed to a cover holder 18 of the manhole. Next, a universal joint 2 that is rotatable and movable up and down is attached to the upper surface of the board 1. The universal joint 2 has a connecting rod 3 whose rear end is fixed, and a connecting bearing 5 is provided at the tip of the connecting rod 3 so as to be located on the side of the road cutter body 4. A belt 9 and a pulley 10 are attached to the rotating shaft 7 which is mounted in line with the rod 3 and the connecting bearing 5.
It is connected to a power source 6, such as an engine or a motor, provided in the road cutter main body 4 via the road cutter body 4. A spherical cutter 8 is fixed to the tip of the rotating shaft 7, and the radius of the spherical cutter 8 is the same as the distance from the universal joint 2 to the spherical cutter 8. Further, the road cutter main body 4 is swingably attached to the support wheels 16, 16' via a universal joint 11.

In the figure, 12 is a water tank for storing cooling water used to prevent the spherical cutter 8 from seizing during cutting operations, and 13 is a support member for rotatably attaching the rotary shaft 7 to the road cutter main body 4.

Note that the means and mechanism for rotating the spherical cutter 8, the cooling means for the spherical cutter 8, the mechanism for moving the road cover body 4 downward, etc. are not limited to the above-mentioned embodiments, and may include conventional means and mechanisms. may also be used.

Regarding the use of circular road cafters,
The base plate 1 provided with the swivel bearing 2 is fixed with the manhole fixing bolt 15 of the manhole 14, and then the rotary shaft 7 is rotated by the power valve 6, and the road cutter main body 4 is moved by pushing the handle 17, etc. The road cutter main body 4 moves forward and downward around the universal joint 11 and the universal bearing 2, and can cut the road surface. (See the one-dot line in Figure 2) At this time, the rotating shaft 7 is connected to the connecting rod 3 via the connecting bearing 5, so it can rotate without any problem, and the spherical surface fixed at the tip of the rotating shaft 7 Since the radius of the cutter B is the same as the distance from the universal joint 2, even when the road cutter main body 4 rotates around the universal bearing 2, the road surface can be cut in the circular radius of the spherical cutter 8. It becomes possible. Furthermore, as shown in FIG. 1, the cut surface of the appetizer becomes more inwardly shaped as the cutting depth increases. Therefore, after the cutting operation is completed, it is easy to dig back the cut inner concrete, and the concrete can be pulled upward.

(Effects of the Invention) The present invention operates with the structure as described above, and unlike the conventional case where concrete or asphalt around manholes etc. is cut into a U-shape on the road surface with a straight cutter,
Since the concrete or asphalt is cut in a circle around the manhole, by digging only the inside of the concrete or asphalt cutting line, the cutting mark becomes circular, so the finish of the concrete embedding work that follows can be beautiful. It is. Further, according to the circular road cutter of the present invention, the cut surface is shaped so that it is dug inward as the cutting depth increases, and it is easy to dig back the cut inner concrete after the cutting operation is completed. Not only can the concrete be lifted upwards, but it is also easy to fill in the remains after work, improving the work efficiency of the entire process.

Furthermore, the structure itself is simple and has excellent effects such as being able to be produced at low cost.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a schematic cross-sectional explanatory diagram of the present invention, Fig. 2 is an enlarged sectional view of the main part of the same, No. 311 is a perspective view of the same, and Fig. 4 shows a conventional cutting state. FIG. 1 is a base plate, 2 is a universal joint, 3 is a connecting rod, 4 is a road cutter body, 5 is a connecting bearing, 6 is a power source, 7 is a rotating shaft, 8 is a spherical cutter, 9 is a belt, 10 is a pulley, 11 is a Universal joint, 12 is a water tank, 13 is a support material, 14 is a manhole, 15 is a manhole fixing bolt, 16.16' is a support wheel, 17 is a handle, and 18 is a manhole cover holder. Patent applicant: Ito Tekkosho Co., Ltd.

Claims (1)

[Claims] A rotating shaft is connected via a connecting bearing to the tip of a connecting rod whose rear end is supported by a universal joint rotatably attached to a base plate, and the rotating shaft is supported by a road cutter body, and is provided on the road cutter body. A rotatable spherical cutter is attached to the tip of a rotating shaft that is rotated by a power source, and a support wheel is provided on the road cutter body so that the spherical cutter can be moved downward during work to cut into the road surface. A circular road cutter characterized by: