JPH04231519A - Circular cutter for road - Google Patents

Abstract

PURPOSE:To prevent the occurrence of noise and dust during cutting periods as well as easily and quickly cut road near manhole in a round form. CONSTITUTION:A cylindrical bit 28, in which a connector 24 with a vertical long hole 25 to be connected to a heavy machine is connected with a motor 22 and a shaft 26 to pivot by the use of the motor 22, an optional number of cutting blades 31 formed at equal interval its lower end periphery, is fixed to a shaft 26 piercing the center of the upside 35 of the bit 28. In piercing the shaft 26 into the hole 42, peephole 33 for making insertion easier is formed in the upside 35 of the shaft 28. The circular cutter 20 is temporarily set on the manhole and the shaft 26 of the cutter 20 is fitted into the hole 42 of an attachment 40 made to pivot to cut the paved road in a round form.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a circular road cutting machine configured to cut a road surface near a manhole in a circular shape, which is used in road paving work, etc., and in particular, the present invention relates to a circular road cutting machine configured to cut a road surface near a manhole in a circular shape, and in particular, the present invention relates to a circular road cutting machine configured to cut a road surface near a manhole in a circular shape. The present invention relates to a road surface circular cutting machine that is configured with a shaft that is rotatable by the motor and a cylindrical bit that is fixed to and interlocks with the shaft, so that it can perform quick cutting and reduce the generation of dust.

0002

2. Description of the Related Art Conventionally, as a circular cutting machine for road surfaces near manholes, a machine disclosed in Japanese Patent Publication No. 61-33938 has been known.

That is, as shown in FIG. 7, the road surface circular cutting machine has a screw shaft 5 screwed vertically into and passed through the intersection of both legs of an inverted V-shaped member 4, and a rotatable screw shaft 5. The road cutting vehicle 7 includes a disc-shaped blade 9 connected to a chassis 8 via a rotating arm 6 pivotally connected to the road cutting vehicle 7 having traveling wheels 10, 10 and displacement wheels 11, 11.

[0004] The rotating shafts of the disc-shaped blade 9 and the running wheels 10, 10 of the road cutting vehicle 7 are arranged to rotate in the direction of the screw shaft 5.

[0005] The displacement wheels 11, 11 have a function of adjusting the cutting depth, and have a caster structure.

When using the road surface circular cutting machine, the ends of both legs of the inverted V-shaped member 4 are engaged with the hooks 3, 3 attached to the manhole cover 2 on the paved road surface 1 so as to be able to rise and fall freely, and the screws are inserted. By pressing the shaft 5 against the central part of the surface of the manhole cover 2 and tightening it, the screw shaft 5 and the inverted V-shaped member 4 were fixed on the manhole cover 2.

[0007] Furthermore, by driving the road cutting vehicle 7 around the screw shaft 5, circular cutting of the road surface with the disc-shaped blade 9 was performed.

[0008]

[Problems to be Solved by the Invention] However, according to the above-mentioned conventional road surface circular cutting machine, the inverted V-shaped member is engaged with a hook attached to the manhole cover so as to be able to rise and fall freely. In addition, since the screw shaft was fixed, there was a problem that it could not be used with a manhole cover without a hook.

[0009] In addition, even when a manhole cover is equipped with a hook, by engaging both legs of the inverted V-shaped member with the hook and further tightening the screw shaft, the inverted V-shaped member and the screw shaft can be attached to the manhole cover. There was a problem in that it required a great deal of time and effort to fix the inverted V-shaped member and the screw shaft on top.

Furthermore, when cutting, a road cutting vehicle was driven and a disk-shaped blade provided on the road cutting vehicle was pressed onto the paved road surface to perform cutting.
There were problems in that cutting was slow and work efficiency was poor.

The present invention has been made in view of the above circumstances, and includes rotating a shaft by a motor, further interlockingly rotating a cylindrical bit fixed to the shaft, and
The present invention provides a novel road surface circular cutting machine configured so that work can be performed quickly and easily by temporarily installing an attachment.

0012

[Means for Solving the Problems] In order to achieve the above objects, the present invention provides a shaft configured to be rotated by a motor, a cylindrical bit fixed to the shaft, and a cylindrical bit formed at the tip of the cylindrical bit. The above object is achieved by providing a road surface circular cutting machine having a cutting blade having a circular shape.

[0013]

[Operation] The road surface circular cutting machine according to the present invention has a shaft configured to be rotated by a motor, and a cylindrical bit fixed to the shaft and having a cutting blade formed at its tip. By driving the motor, a shaft mechanically connected to the motor is rotated, and a cylindrical bit fixed to the shaft starts rotating in conjunction.

[0014] The cutting blade of the rotated cylindrical bit is pressed against the road surface by a heavy machine, thereby cutting the road surface in a circular shape.

[0015] Since the cutting blade is fixed at a predetermined angle in the opposite direction of rotation, the frictional force with the road surface is dispersed, stress is not concentrated at the base end of the cutting blade, and damage to the cutting blade can be prevented. At the same time, there is no cutting blade vibration noise due to frictional resistance, making it possible to prevent noise during cutting.

Furthermore, since the cutting blade is made of cemented carbide special steel, unevenness is formed on the cutting surface compared to a diamond cutter, so when constructing asphalt pavement, it blends well with existing asphalt and can be used with adhesives. The adhesion strength of
Strong pavement can be created.

During cutting of the road surface, the shaft is fitted into an attachment temporarily installed in a manhole and is pivotally supported, so that the cylindrical bit is centered, and the cylindrical bit is prevented from rotating or vibrating. Stable rotation enables high-precision circular cutting and rapid cutting.

Furthermore, by forming the fitting hole of the temporary attachment with a bearing, generation of frictional heat and friction noise between the shaft and the fitting hole can be prevented.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a circular road cutting machine according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of a circular road cutting machine according to the present invention, FIG. 2 is a perspective view of the same embodiment, and FIG. 3 is a plan view showing an embodiment of an attachment temporarily installed in a manhole. , FIG. 4 is a perspective view showing the same embodiment, and FIG. 5 is a perspective view showing the usage state of the road surface circular cutting machine according to the present invention.
FIG. 6 is a plan view showing the state of use.

The road surface circular cutting machine 20 according to this embodiment is as follows:
A shaft 2 configured to be rotated by a motor 22
6, and a cylindrical bit 28 which is fixed to the shaft 26 and has a cutting blade 31 formed at its tip.

The motor 22 and shaft 26 are shown in FIG.
As shown in FIG. 2, a connecting part 24 is formed on the upper part of the motor 22 and has vertical slots 25, 25 which are connected to the same axis and connected to heavy machinery, and the heavy machinery and the vertical slots 25 are connected by bolts or the like. By stopping heavy machinery and road surface circular cutting machine 20
is configured to be detachable.

[0023] As mentioned above, by having a connecting part and being detachable from heavy machinery, it can be connected to various types of heavy machinery, and furthermore, workability can be improved by removing it during transportation, repair, etc. It becomes possible.

A cylindrical bit 28 having an arbitrary number of cutting blades 31 provided at equal intervals on the outer peripheral edge of the lower end is fixed to the upper surface 35 of the shaft 26, and rotates in conjunction with the shaft 26. is configured to do so.

In particular, the shaft 26 is configured to pass through the center of the upper surface 35 and extend toward the lower end of the cylindrical bit.
Furthermore, the tip of the shaft that protrudes from the lower end of the cylindrical bit is inserted into the through hole of the attachment and is fixed, allowing the cylindrical bit to rotate stably around the shaft without any rotational wobbling even when cutting. will be held.

Peep holes 33, 33 are formed in the upper surface 35 of the cylindrical bit 28, and the shaft can be inserted into the through hole 42 by checking the insertion from the peep holes 33, 33 into the through hole 42. The tip of the shaft can be inserted quickly and easily.

The rotation of the shaft 26 is caused by the rotation of the motor 2.
The power is transmitted from the motor 22 to the shaft 26 by a transmission mechanism in which the shaft of the motor 22 and the shaft 26 are joined via a flange.

It should be noted that the power transmission mechanism of the present invention is not limited to this, and may be a transmission mechanism using gears or other various transmission mechanisms.

The motor 22 is constituted by a relatively small hydraulic motor that can obtain a large torque so as to be able to cope with the load when cutting the road surface.

The configuration of the motor 22 is not limited to this, and an electric motor or other various types of prime movers may be used.

As shown in FIGS. 3 and 4, the attachment 40 has a disk shape so that it can be temporarily installed in a manhole, and has a through hole 42 formed in the center thereof by fitting a bearing 44 thereinto.

Furthermore, the attachment 40 has a locking protrusion 46 on its outer circumference to facilitate attachment and detachment from the manhole.
46 is installed vertically.

[0033] By providing the attachment 40 in various shapes and sizes, it is possible to attach it to various manholes.

Next, a method of using the road surface circular cutter 20 of the present invention will be explained based on FIGS. 5 and 6.

First, remove the existing manhole cover and hold the attachment 40 by the locking protrusions 46, 46, or
Alternatively, by connecting wires or the like to the locking protrusions 46, 46, it is hoisted up and attached to a manhole.

Next, as shown in FIG. 5, the shaft 26 of the road circular cutting machine 20 suspended from a heavy machine (not shown) is inserted into the through hole 44 of the temporary attachment 40 through the peep holes 33, 3.
Insert it while checking the position from step 3.

After the shaft 26 is inserted, the motor 22 is driven and the road surface circular cutter 20 is lowered toward the road surface using heavy equipment, and the road surface is pressed by the cylindrical bit 28, thereby causing the cutting blade 31 to cut the road surface circularly.

[0038] In the present invention, the rotating speed of the cylindrical bit is set to a low speed of about 50 to 100 revolutions per minute to prevent generation of dust and noise due to high rotational force and to prevent harm to environmental hygiene. Furthermore, since no dust is generated, there is no need to spray water during cutting, which simplifies the machine structure, saves water, and also simplifies cleaning by preventing cutting powder from turning into sludge due to water spray. Various effects can be obtained, such as improved adhesion between old and new asphalt.

[0039]

Effects of the Invention Since the road surface circular cutting machine according to the present invention is constructed as described above, it has the following effects.

(1) The shaft is configured to pass through the center of the upper surface of the cylindrical bit and extend toward the lower end of the cylindrical bit, and is configured to protrude from the lower end of the cylindrical bit, so that the tip of the shaft It can be inserted into the through hole of the attachment, and the shaft is pivotally supported by the through hole during cutting, so the cylindrical bit fixed to the shaft does not rotate or wobble even when subjected to frictional resistance or impact force during cutting. It has the excellent effect of stably rotating around the shaft without causing any distortion, enabling quick cutting work, and also being able to easily perform high-precision circular cutting.

(2) Furthermore, since rotational cutting is performed using a motor, there is an excellent effect that circular cutting can be performed quickly and easily.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of a road surface circular cutting machine according to the present invention.

FIG. 2 is a perspective view showing the same embodiment.

FIG. 3 is a plan view showing an example of an attachment temporarily installed in a manhole.

FIG. 4 is a perspective view showing the same embodiment.

FIG. 5 is a perspective view showing a state in which the road surface circular cutting machine according to the present invention is used.

FIG. 6 is a plan view showing the state of use.

FIG. 7 is a front view showing a conventional road surface circular cutting machine.

[Explanation of symbols]

20 Road surface circular cutting machine 22 Motor 24 Connecting part 25 Vertical slot 26 Shaft 28 Cylindrical bit 31 Cutting blade 33 Peephole 35 Top surface 40 Attachment 42 Through hole 44 Bearing 46 Locking protrusion

Claims (1)

[Claims] 1. A road surface circular cutter comprising a shaft configured to be rotated by a motor, a cylindrical bit fixed to the shaft, and a cutting blade formed at the tip of the cylindrical bit.