JP3079552U - Road bevel cutter - Google Patents

Abstract

(57) [Problem] To provide a road bevel cutter capable of changing a cutting angle of a rotary blade in an appropriate range. SOLUTION: A mounting frame 4 provided with a rotary blade 5 at a lower portion and an engine E at an upper portion on a support frame member 3 provided at an appropriate inclination angle on a flat rectangular base frame BF provided with wheels at a lower portion. A transmission 9 is disposed between the rotary blade 5 of the mounting plate and the engine E in a road bevel cutting cutter provided on the support frame member 3 so as to be slidable up and down and fixed. The output of the engine E is transmitted to the rotary blade 5 via the transmission 9 in an upright state.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a road bevel cutter useful for use in road construction for excavating a road surface.

[0002]

[Prior art]

 When repairing pavement roads with asphalt, etc., and plumbing and repair work for water and gas, etc., a rectangular cross-section recess is excavated in the road. A method was used in which a cutter was used to cut the road at the required width to the required width, and a cut was made at a right angle to the road surface before digging.However, when digging in this state, a tool such as a shovel would cut the edge of the right cut. In such a case, there was a problem that the edge portion was damaged and the work of refilling after the completion of the construction was adversely affected.

[0003] In response to this problem, the inventor of the present invention first devised a road bevel cutter capable of cutting at an appropriate angle to the cut angle of the cut, and received utility model registration (No. 2508227). Was. In this road bevel cutter, wheels are mounted on the lower end of a substantially triangular base frame that has a hypotenuse at a required angle when viewed from the side, an engine is installed on the oblique side on one side of the frame, and a rotary blade is mounted on the lower part. And a frame formed by attaching pulleys to the output shaft of the engine and the mounting shaft of the rotary blade and wrapping a belt around the pulleys so as to be vertically slidable and fixable on the oblique side of the base frame. The sliding angle of the rotary blade is set to approximately 45 degrees.

However, the above-described road bevel cutter has a type and structure in which the output shaft of the engine and the input shaft of the rotary blade are directly connected via a transmission member such as a pulley and a belt. The input shaft of the rotary blade had to be arranged in parallel, so that the engine had to be mounted on the back side of the mounting plate at a large angle of inclination that was almost inverted. If the engine is installed in an inverted state, the type of engine that can be used is restricted by itself, and there is a problem that the degree of freedom in design is low.

[0005] On the other hand, regarding the slope cutting work on roads, the cut angle of the cuts on the roads is about 15 to 60 degrees, especially due to the difference in the construction method in public works performed by each local government. Because of the differences, it was often not possible to use the previously proposed road bevel cutter with a fixed cutting angle.

[0006]

[Problems to be solved by the invention]

 In view of the above-mentioned prior art, the present invention has as its first object to provide a road bevel cutter having a structure in which an engine can be mounted in an upright state. It is a second object of the present invention to provide a road bevel cutter that can change the cutting angle of a rotary blade in an appropriate range even if it is a cutter.

[0007]

[Means for Solving the Problems]

 The first configuration of the present invention made for the purpose of solving the first problem described above includes a support frame member provided at an appropriate inclination angle on a flat square base frame provided with wheels at a lower portion, and a lower portion. In a road bevel cutter in which a rotary blade is provided on the upper surface and an engine is provided on the upper portion, the mounting plate is slidably and vertically slidably and fixedly mounted on the frame member, the speed is changed between the rotary blade of the mounting plate and the engine. And the engine is installed in an upright state, and the engine output is transmitted to the rotary blade via the transmission.

A second configuration of the present invention made for the purpose of solving the above second problem has a vertical frame at one end of a chassis frame having wheels at a lower portion and having a substantially rectangular shape when viewed from a plane. And a swing support frame member whose lower end is pivotally mounted on a horizontal axis extending in the front-rear direction of the chassis and which can swing and fix the axis at an appropriate angle within the base frame. On the upper surface of the support frame member, a mounting plate provided with a rotary blade at the lower portion mounted with the engine upright at the upper portion and an output shaft of the upright engine and an input shaft of the rotary blade connected via a speed change mechanism. The cutting edge of the rotary blade with respect to the road is appropriately changed and set according to the swing angle of the swing supporting frame member by providing the swing supporting frame member so as to be slidable and fixed vertically. In addition, the depth of cut of the rotary blade can be adjusted according to the sliding position of the mounting plate.

According to the present invention, in the first configuration, the support frame member can be made swingable and fixable. As a means for this, a mechanism for swinging and fixing the plate member is provided on the vertical frame. It is also possible to adopt a structure to be supported by a mechanism. Also, a structure using a feed screw mechanism should be used for sliding and positioning the mounting plate on the swing support frame member.

[0010]

[Embodiment of the invention]

 Next, an embodiment of the present invention will be described with reference to the drawings based on the second configuration. FIG. 1 is a side view of an example of the road bevel cutter of the present invention, in which a main part is sectioned, and FIG. 2 is a view showing a portion of the road to be cut.

In FIG. 1, reference numeral 1 denotes a chassis frame having a substantially rectangular frame shape when viewed from a plane, and four wheels W are attached to lower portions of four corners of the chassis frame. A vertical frame 1H is erected by opposing pillar members 1a and 1b, and a guide member 2 having an arcuate guide arc groove 2a is laid diagonally on the vertical frame member 1H to form a base frame BF.

Reference numeral 3 is attached to the left side of the chassis frame 1 in FIG. 1 with its lower part pivotally connected to a shaft 3a on the column member 1a side so as to be able to swing obliquely right and left around the shaft 3a. And a swing support frame member provided so as to be guided by the guide member 2 via a guide mechanism to be described later and swing and fixed at a desired swing angle.

Reference numeral 4 denotes a rotary blade 5 mounted on a lower portion on a lower surface side, and an engine E mounted on an upper portion on an upper surface side. In this state, the engine E is mounted on the upper surface of the swing support frame member 3 so as to be vertically slidable. It is a mounting plate that is bridged. The mounting plate 4 is provided with a nut member 4a screwed to a feed screw 3b provided at the upper end of the swing support frame member 3. Therefore, when the nut member 4a is screwed into the feed screw 3b of the swing support frame member 3 and the screw 3b is rotated forward and backward, the mounting plate 4 is moved to the upper surface of the swing support frame member 3. , So that it can be vertically slid and fixed.

With the above configuration, when the handle 3c of the feed screw 3b is rotated R1, the mounting plate 4 provided with the engine E and the rotary blade 5 slides on the upper surface of the swing support frame member 3 in the upward and downward directions S1. The cutting depth of the rotary blade 5 can be adjusted by adjusting the sliding position. In addition, the swing angle of the rotary blade 5 can be changed by swinging and fixing the swing support frame member 3 to a desired angle (inclination).

Here, an example of a mechanism for adjusting the tilt angle by swinging the swing support frame member 3 will be described. That is, reference numeral 6 denotes a bracket integrally provided on one side of the swing support frame member 3, which is located on the surface side of the mounting plate 4 of the rotary blade 5 in the illustrated example, and is inserted into the arc groove 2a of the guide member 2. The bracket 6 is provided with a guide pin 6a to be guided and guided, and a screw mounting ring 6b is provided on the outer end side of the bracket 6. On the other hand, a nut 7 is provided on the column member 1a of the vertical frame 1H so as to be able to swing freely, a feed screw 8 is screwed to the free nut 7, and a tip end of the screw 8 is connected to the ring 6b of the bracket 6. .

According to the above configuration, when the handle 8a of the feed screw 8 is rotated R3, the screw 8 moves forward and backward S3, and the swing support frame member 3 is guided by the guide arc groove 2a of the guide member 2. Since the swing SW is guided by 6a, the mounting plate 4 having the rotary blade 5 mounted on the upper surface of the swing support frame member 3 swings integrally. Therefore, the cutting angle (inclination angle) of the rotary blade 5 can be arbitrarily set or changed by appropriately positioning the swing support frame member 3 at the swing angle. Normally, it is sufficient that the swing angle (inclination angle) of the rotary blade 5 is about 2, 30, 6 or 70 degrees with respect to the road surface, but the present invention is not limited to this.

On the other hand, the rotary blade 5 is driven by the following mechanism. That is, 9 is a transmission (transmission) mounted between the engine E and the rotary blade 5 on the upper surface of the mounting plate 4 for the rotary blade 5, 9a is an input pulley of the speed change mechanism 9, 9b is an output pulley, Is an input pulley mounted on the mounting shaft 5a of the rotary blade 5, E1 is an output pulley mounted on the output shaft of the engine E, and a belt B1 is mounted on the pulleys E1 and 9a, and a belt is mounted on the pulley 9b and the pulley 10. When the engine E is driven by looping B2 around each other, the rotation is transmitted to the mounting shaft 5a of the rotary blade 5 via each pulley, and the rotary blade 5 rotates.

In FIG. 1, E 2 denotes a fuel tank of the engine E, 11 denotes a shaft of a wheel W, 12 denotes a worm wheel attached to the shaft 11, and 13 denotes a rotation having a worm 14 attached to the wheel 12 at its tip. By rotating the handle 15 with the shaft, the shaft 11 of the wheel W is rotated S2, and the base frame BF can be moved in the cutting direction. In FIG. 2, R is a road, K is a cut formed in the road R to form a concave portion, and M is a portion of the road R to be cut off.

The road bevel cutter of the present invention configured as described above can be attached to both sides of the width of the road R to be excavated by a normal road cutter at an appropriate depth when repairing the road R or the like. After the straight cuts K, K are provided, they are positioned outside the cut K. First, the handle 8a of the feed screw 8 is rotated to swing the swing support frame member 3 to obtain a desired swing angle ( (Cutting angle), the bevel angle of the rotary blade 5 is set to a desired angle. Then, the handle 3c is operated to bring the rotary blade 5 into contact with the ground R, and the engine E is driven. The handle 3c is rotated while lowering the mounting plate 4 on which the rotary blade 5 is mounted on the plate member 3 so as to have a desired cutting depth.

In this state, the steering wheel 15 is rotated to rotate the wheel W, and the bevel cutter of the present invention is advanced. By the above operation, the rotary blade 5 advances along the excavation position while cutting the portion M to be beveled so as to reach the cut K. By doing so, diagonal grooves are formed on both outer sides of the portion of the road to be repaired, and if excavation work is performed with a shovel or the like in this state, even if there is an operation error with the shovel, etc. There is almost no risk of injury.

Conventional road bevel cutters can only bevel a road at a specific angle, and thus cannot be applied to road excavation work in the construction of local governments that employ various cutting angles. However, the road bevel cutter of the present invention has a very wide range of use because the bevel can be set to the desired angle as described above.

Although the above description is based on the second configuration of the present invention, the road oblique cutting cutter according to the first configuration of the present invention does not use the support frame member 3 in the above-described example as a swingable structure. , With a fixed angle.

[0023]

[Effect of the invention]

 The present invention is as described above. By placing a transmission between the engine output shaft and the rotary blade input shaft, it is possible to mount the engine on the mounting plate in an upright posture, while the rotary blade is mounted. The mounting plate is vertically slidable and fixable on the support frame member or vertically slidable and fixable, and swingably and freely fixed. This is advantageous in all aspects such as installation, operation, and maintenance, and the road bevel cutter can be manufactured and provided easily and inexpensively with a simple structure. In addition, since this cutter can freely realize a desired cutting depth or a cutting angle along with the cutting depth, it is extremely useful as a road oblique cutting cutter.

[Brief description of the drawings]

FIG. 1 is a side view of an example of a road bevel cutter according to the present invention in which a main part is sectioned.

FIG. 2 is a diagram showing a portion of a road to be cut.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chassis frame 1a, 1b Column member BF Base frame 2 Guide member 2a Arc groove 3 Oscillation support frame member 3a Shaft 3b Feed screw 3c Handle 4 Mounting plate 4a Nut member 5 Rotating blade 5a Rotating blade mounting shaft 6 Bracket 6a Guide pin 6b Ring 7 Nut member 8 Lead screw 8a Handle 9 Transmission 9a, 9b Pulley 10 Rotary blade rotation pulley E Engine E1 Pulley B1, B2 Belt

Claims (5)

[Utility model registration claims] 1. A support frame member provided at an appropriate inclination angle on a flat rectangular base frame provided with wheels on a lower portion, a mounting plate provided with a rotary blade on a lower portion and an engine on an upper portion, and Up and down sliding on members,
In a road bevel cutter fixedly provided, a transmission is placed between the rotary blade of the mounting plate and the engine, and the engine is provided in an upright state, and the engine output is transmitted to the rotary blade via the transmission. A road bevel cutter characterized by transmission. 2. The road cutting cutter according to claim 1, wherein the lower end of the support frame member is pivotally connected to the base frame by a horizontal axis so that the cutting angle can be changed. 3. A lower frame is pivotally attached to a base frame having wheels at a lower portion thereof and having a vertical frame provided at one end of a substantially square chassis frame viewed from a plane, the lower end of which is pivoted by a horizontal axis extending in the front-rear direction of the chassis. A swing support frame member capable of swinging and fixing at an appropriate angle range with respect to the axis is provided,
A mounting in which a rotating blade is mounted on an upper surface of the swing supporting frame member at a lower portion and an engine is erected on an upper portion, and an output shaft of the upright engine and an input shaft of the rotating blade are connected via a speed change mechanism. By providing the plate so as to be vertically slidable and fixable on the swing support frame member, the cutting angle of the rotary blade with respect to the road can be appropriately changed and set according to the swing angle of the swing support frame member. ,
A road bevel cutter wherein the cutting depth of the rotary blade can be adjusted depending on the sliding position of the mounting plate. 4. The road bevel cutter according to claim 2, wherein the swing support frame member is supported by a swing and fixing mechanism of the plate member provided on the vertical frame. 5. A road bevel cutter according to claim 1, wherein the means for sliding and positioning the mounting plate with respect to the swing support frame member uses a feed screw mechanism.