JP2007218012A - Cutter for road surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutter for a road surface easily operable with simple constitution, having excellent transportation efficiency and working efficiency and high safety, low in cost and economical. <P>SOLUTION: The cutter 1 for the road surface is composed of a vehicle body base part 2; front wheels 3 and rear wheels 4 for moving travel; a rotating shaft 5 with a rotation center axis arranged in the same direction as the arranged direction of the front wheels 3 and rear wheels 4; a rotating shaft holding part 6 holding the rotating shaft 5; a rotating drive source 7; and a drive part holding body 9 mounted with the rotating shaft holding part 6 and the rotating drive source 7 and arranged to be swingingly separable from the vehicle body base part 2. A rotary blade body part 12 provided with a cutting edge at the periphery is detachably mounted to the other end 11 of the rotating shaft 5 in a state of extending from the front end 13 of the vehicle body base part 2, and the rear end 15 of the drive part holding body 9 is provided turnably around a turning center part 16 provided in a predetermined part of the vehicle body base part 2. Further, an anchor insertion passage part 18 is formed inward into the vehicle body base part 2 from the rear end 17 of the vehicle body base part 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a road surface cutter used in road construction and the like, and in particular, is a road surface cutter for cutting a road surface into a straight line or a circle, and operates with a simple configuration. The present invention provides a road surface cutter that is simple, inexpensive, and has excellent transport efficiency and workability.

  So-called asphalt cutters, concrete cutters, etc. are used in road surface cutting work that has been conventionally performed in road construction etc. For example, when cutting a road surface in a straight line, a flat blade rotating body with a diamond blade, etc. A cutter for road surfaces that uses a cutter with a super-hard blade is used, and when the road surface is cut into a circular shape, for example, an arc-shaped rotating body with a circular cutting blade is used. A road surface cutter is used.

For example, a road surface cutter disclosed in Japanese Patent No. 3371254 (Patent Document 1) is known.
The road surface cutter shown in the above patent publication has a function capable of cutting the road surface linearly or cutting the road surface into a circular shape. It is designed to have a structure suitable for cutting into a circular shape.

  That is, the road surface cutter described in the conventional example has a front wheel and a rear wheel arranged at the front end and the rear end of the body board, respectively, and the side of the body board between the front wheel and the rear wheel. The rotary circular cutting blade described above is arranged at the edge, that is, the cutting blade has a structure in which the rotation center axis is arranged in a direction orthogonal to the arrangement direction of the front wheel and the rear wheel. is doing.

  Furthermore, in the above conventional example, it is necessary to use differently configured wheels depending on the purpose when the road surface is cut into a straight line as a front wheel and when the road surface is cut into a circular shape. Therefore, an additional function is required to incline the vehicle body board with respect to the traveling direction of the road surface cutter so that the front end of the vehicle body board moves up and down with respect to the road surface.

  Furthermore, in the conventional example, when the road surface cutter does not cut the road surface, the cutting blade provided on the side edge portion does not come into contact with the road surface when traveling on the road surface. The cutting blade, the rotating shaft of the cutting blade, the appropriate rotating shaft holding portion, and the rotating shaft around the side edge of the body substrate opposite to the side edge where the road surface cutter is provided. There is a need for a mechanism for turning a frame portion equipped with a drive source such as a rotating gasoline engine.

  Accordingly, the conventional road surface cutter has a complicated structure and is expensive, and is poor in operation efficiency because it is mainly operated manually. Further, the cutting blade is disposed at the side edge of the road surface cutter. Therefore, the road surface cutting work on an inclined surface or slope is accompanied by a risk of falling, etc., and the gasoline engine is used as the rotational drive source for the cutting blade, resulting in a higher center of gravity and an inclined surface. Or the same problem exists in the road cutting work on a slope.

  On the other hand, in the above-described conventional road surface cutter, particularly when cutting the road surface in a circular shape, on the outside of the side edge portion of the vehicle body substrate opposite to the side edge portion on which the road surface cutter is provided, The arm part that engages and joins the anchor arranged at the center of the circle to be cut is provided to be stretchable and configured to accommodate the desired circular size, but when viewed in plan view In addition, a part of the vehicle body board including the wheel often protrudes outside the circle having the desired diameter, and when forming a desired circular cut circle at a desired part on the road surface, When there are curbs, blocks, walls, utility poles, and various buildings in the vicinity, there is a problem that the road cutter cannot be used.

  In addition, regarding the road surface cutter having substantially the same configuration as the above-described conventional example, Japanese Utility Model Laid-Open No. 3-72904 (Patent Document 2), Japanese Patent Application Laid-Open No. 2003-328317 (Patent Document 3), Japanese Patent Application Laid-Open No. 2005-97971. (Patent Document 4), Japanese Patent Application Laid-Open No. 7-279118 (Patent Document 5), and Japanese Utility Model Application Laid-Open No. 7-35844 (Patent Document 6). The blade is provided at the side edge of the vehicle body substrate, and when cutting a circular road surface, the joint or engagement portion with the anchor provided at the center of the circular portion is the surface of the road surface cutter. Since it is provided outside the plane outline of the vehicle body substrate, it is clear that it has the same problem as the conventional example described above.

Japanese Patent No. 3371254 Japanese Utility Model Publication No. 3-72904 JP 2003-328317 A JP 2005-97971 A JP 7-279118 A Japanese Utility Model Publication No. 7-35844

  Accordingly, the object of the present invention is to eliminate the above-mentioned conventional problems, and is easy to operate, yet has a simple structure, excellent transport efficiency and workability, and high safety. An inexpensive and economical road surface cutter is provided.

In order to achieve the above object, the road surface cutter according to the present invention employs a basic technical configuration as shown below.
That is, the road surface cutter according to the present invention has a rotation center axis in the same direction as the arrangement direction of the vehicle body board part, the front and rear wheels for traveling traveling provided on the vehicle body board part, and the front wheel and the rear wheel. Arranged rotating shaft, rotating shaft holding portion that rotatably holds the rotating shaft, a rotational drive source for rotationally driving the rotating shaft, and a drive constituted by the rotating shaft holding portion and the rotational drive source And a drive unit holding body that is disposed so as to be able to contact with and separate from the vehicle body substrate unit, and one end portion of the rotating shaft is rotated through the rotating shaft holding unit. A rotary blade body part that is directly or indirectly engaged with the drive source and has a cutting blade provided around the other end of the rotary shaft is located in front of the vehicle body substrate part or the drive part holding body. Detachably attached in a state extending from the end, and A swivel provided at a predetermined portion of the vehicle body substrate portion so that the rear end portion of the drive portion holding body forms an arbitrary angle with respect to the vehicle body substrate portion. An anchor insertion passage portion is provided that is pivotable about the center portion, and is further formed from the rear end portion of the vehicle body substrate portion toward the inner direction of the vehicle body substrate portion. It is a road surface cutter in which the anchor fixing grip portion is provided at the terminal end of the anchor insertion passage portion.

  The road surface cutter in the present invention adopts the above-described technical configuration, so the structure and mechanism are simple, and the automation is still easy, so the road surface cutting operation is extremely easy and efficient. In particular, when the road surface is cut into a circular shape, the traveling distance of the road surface cutter is small and the work efficiency is good, and the moving radius of the road surface cutter can be reduced. The curb, blocks, walls, utility poles, and various structures significantly reduce the possibility of road cutting being impossible, and because the overall balance is good, there is a risk of falling on slopes such as slopes. Therefore, it is possible to provide a road cutter capable of exhibiting an excellent effect of being no.

Below, the structure of the specific example of the cutter for road surfaces concerning this invention is demonstrated in detail, referring drawings.
That is, FIG. 1 is a diagram showing a configuration of a specific example of a road surface cutter 1 according to the present invention. In the figure, a vehicle body board portion 2 and a front wheel for moving traveling provided on the vehicle body board portion 2 are shown. 3 and the rear wheel 4, the rotation shaft 5 in which the rotation center axis is arranged in the same direction as the arrangement direction of the front wheel 3 and the rear wheel 4, the rotation shaft holding portion 6 that rotatably holds the rotation shaft 5, A rotational drive source 7 for rotationally driving the rotational shaft 5, and a drive unit 8 composed of the rotational shaft holding unit 6 and the rotational drive source 7 are mounted, and are in oscillating contact with the vehicle body substrate 2. It is comprised from the drive part holding body 9 arrange | positioned so that isolation | separation, One end part 10 of the said rotating shaft 5 is directly or pulley with respect to the said rotational drive source 8 via the said rotating shaft holding part 6. Alternatively, it is indirectly engaged through appropriate power transmission means such as a gear train and the rotation A rotary blade body portion 12 having a cutting blade provided around the other end portion 5 is detachable in a state of extending from the front end portion 13 or 14 of the vehicle body substrate portion 2 or the driving portion holding body 9. The rear end 15 of the drive unit holding body 9 is attached to the drive unit holding body 9 so that the drive unit holding body 9 forms an arbitrary angle with respect to the vehicle body substrate 2. The rear end portion 15 is provided so as to be capable of turning about a turning center portion 16 provided at a predetermined portion of the vehicle body substrate portion 2, and further for the road surface according to the present invention shown in FIG. As can be seen from the rear view of the cutter 1, an anchor insertion passage portion 18 formed from the rear end portion 17 of the vehicle body substrate portion 2 toward the inside of the vehicle body substrate portion 2 is provided, and the anchor The anchor at the end 19 of the insertion passage 18 0 and the road cutter 1 anchorage gripping portion 21 is provided to be engaged are shown.

  In the anchor insertion passage portion 18 according to the present invention, an opening 23 having a predetermined width is formed in the rear end portion 17 of the vehicle body substrate portion 2 so that the anchor 20 can be easily inserted. The width is gradually reduced toward the center portion of the vehicle body substrate portion 2, and the circular anchor receiving portion 24 having an inner diameter substantially equal to the diameter of the anchor 20 is provided at the end portion 19 of the anchor insertion passage portion 18. Is provided.

  The entrance portion of the anchor receiving portion 24 is provided with an appropriate chuck mechanism 25 that easily retracts when the anchor 20 is inserted, but prevents the anchor 20 from escaping. It is desirable to have a mechanism that allows the anchor 20 to escape from the anchor receiving portion 24 by the operation of the operator.

The anchor receiving portion 24 and the chuck mechanism 25 according to the present invention are a specific example that constitutes the anchor fixing grip portion 21.
A more detailed embodiment of the above-described embodiment of the present invention is shown in FIG.
That is, FIG. 2 (B) is a back view illustrating FIG. 2 (A) in detail, and more specifically shows a configuration example of the anchor fixing grip portion 21.

  That is, the chuck 25 of the anchor fixing gripping portion 21 always closes the entrance of the anchor receiving portion 24 by an appropriate spring, and when the anchor 20 is inserted into the anchor receiving portion 24, The chuck 25 turns against the spring force to open the entrance portion of the anchor receiving portion 24.

  On the other hand, when the anchor 20 is released from the anchor receiving portion 24, the operator pulls the appropriate lever portion 25 ″ toward the front in the left direction in FIG. The chuck 25 opens the entrance portion of the anchor receiving portion 24.

In FIG. 2, reference numeral 200 denotes a swivel mechanism.
In the road surface cutter 1 according to the present invention, the road blade cutting blade 12 has a front end 13 of the vehicle body substrate portion 2 of the road surface cutter 1, that is, the road surface cutter, as compared with a conventional road surface cutter. The cutter 1 is disposed at the front end portion of the cutter 1 in the normal traveling direction. Therefore, the arrangement direction of the rotary shaft 5 of the cutting blade 12 is the same as the arrangement direction of the front wheel 3 and the rear wheel 4. Of course, the arrangement direction of the cutting blade 12 is arranged to be orthogonal to the arrangement direction of the front wheel 3 and the rear wheel 4.

  Further, the rotary shaft 5 of the road surface cutter 1 according to the present invention has the same center portion between the left and right front wheels 3 and between the left and right rear wheels 4 as the arrangement direction of the front wheels 3 and the rear wheels 4. As a result, the center lines of the rotary shaft 5, the rotary shaft holding portion 6 and the rotary drive source 8 are all advanced by the vehicle body substrate portion 2, as will be described later. By being arranged so as to be coaxial with the central axis of the direction, it is possible to further improve the overall balance.

  Since the road surface cutter 1 in the present invention adopts the basic configuration as described above, the road surface cutter 1 is used as the road surface S when the road surface cutter 1 is not subjected to a road surface cutting operation. A mechanism that lifts the cutting blade 12 so that it does not come into contact with the road surface when traveling and moving along the road surface, and the cutting blade 12 is gradually moved to the surface of the road surface S when the road surface cutter 1 is subjected to a road cutting operation. It is not necessary to separately provide a mechanism for lowering from the inside toward the inside, and the entire configuration or mechanism of the road surface cutter 1 is simplified.

  Furthermore, in the present invention, the anchor fixing gripping portion 21 with the anchor 20 set at the center of the circular shape to be cut on the road surface S is provided inside the vehicle body substrate portion 2 of the road surface cutter 1, for example, Since the rotation distance of the road surface cutter 1 is provided on or in the vicinity of the line 22 connecting the rotation axes of the left and right rear wheels 4 of the vehicle body substrate portion 2, the conventional road surface cutter However, all of the contour lines on the plane formed by the vehicle body substrate portion 2 and the wheels 3 and 4 are inside the circular shape formed by the rotary blade body portion 12. Since it is configured to always exist, when a desired circular cut circle is formed at a desired site on the road surface, there are curbstones, blocks, walls, utility poles, and various structures in the vicinity. Even the road surface can be cut.

  The rotary blade body 12 as the cutting blade used in the road surface cutter 1 according to the present invention includes a flat plate-like rotary blade body provided with a cutting blade and a circular arc-shaped rotary body provided with a cutting blade. It is possible to select arbitrarily from.

  That is, when a circular cutting line is formed on the road surface with the road surface cutter 1, a rotary blade body portion provided with a cutting blade made of a cross-section arcuate rotating body is used, and the road surface cutter 1 In the case of forming a straight cutting line on the road surface, it is desirable to use a flat plate-like rotary blade body.

  Further, at least one of the front wheel 3 and the rear wheel 4 provided in the road surface cutter 1 according to the present invention has a state in which the direction of the wheel is fixed and a state in which the direction of the wheel is freely determined. It is preferable to provide a known selection mechanism 210 that can selectively employ any one of the above.

  That is, in the present invention, when the road surface cutter 1 forms a circular cutting line on the road surface, the direction of the wheel of at least the front wheel 3 described above is the turning of the road surface cutter 1. It is desirable to set a free state so that it is automatically set according to the exercise.

At this time, the rear wheel 4 may be set so that the direction of the wheel is fixed, or the wheel direction may be set in a free state like the front wheel 3.
In the present invention, when a circular cutting line is formed on the road surface while turning the road surface cutter 1, the operator pushes the lever 111 laterally or obliquely forward to cause the road surface cutter 1 to turn. 6 to 9, preferably, an appropriate operation lever 220 is attached to the gear box 110, and the operator frequently operates the lever, as shown in FIGS. The gear box 110 may be rotated, for example, by rotating a hydraulic motor (not shown) provided on the at least one rear wheel 4 to positively rotate the rear wheel 4.

The rear wheel 4 is preferably provided with a brake means.
On the other hand, when a straight cutting line is formed on the road surface by using the road surface cutter 1 according to the present invention, both the front wheel 3 and the rear wheel 4 are turned in the direction of the wheel. It is necessary to fix so that it may become the same direction as 12 arrangement directions.

A conventionally known mechanism 210 can be adopted as means for selectively determining the direction of the rear wheels.
Next, the mechanism for moving the rotary blade body 12 around the cutting blade in the present invention up and down will be described in detail.

  That is, as shown in FIG. 1, in the road surface cutter 1 according to the present invention, when the road surface S is not cut, the lower surface of the rotary blade body 12 is not in contact with the road surface. It has a mechanism that can freely select a state in which an appropriate distance is kept upward and a state in which the rotary blade body 12 is gradually lowered when the road surface S is cut from the state. is required.

  As a specific example of the mechanism in the present invention, as shown in FIG. 1, the drive unit holding body 9 on which the drive unit 8 including the rotary shaft holding unit 6 and the rotation drive source 7 is mounted is provided. Adopting a configuration that can pivot with respect to the vehicle body substrate 2, one end of the drive unit holder 9 is placed in an appropriate part of the vehicle body substrate 2 so that both can approach and separate from each other. Preferably, an appropriate hinge mechanism provided at a position close to the rear wheel 4 or a turning portion 16 is used to be attached so as to be turnable. With such a configuration, the drive portion holding body 9 is mounted. The rotary shaft 5 and the rotary blade body portion 12 attached to the tip of the rotary shaft 5 can integrally move up and down in an arc shape with respect to the vehicle body substrate portion 2.

  In the present invention, for example, an appropriate fluid cylinder 26 using hydraulic pressure or air pressure may be used as the mechanism for moving the driving unit holding body 9 in a swingable manner with respect to the vehicle body substrate unit 2. This configuration is possible, and it is possible to automate and accurately execute the up-and-down movement operation of the rotary blade body 12 which has been conventionally performed manually.

  In the present invention, when the cutting blade 12 having a circular cross section is used, it is necessary to change the cutting angle depending on the size of the cutting blade, and the angle adjustment is performed by installing the rotating shaft of the cutting blade. This is performed by the vertical movement of the drive unit holder 9.

In the present invention, particularly by using a hydraulic cylinder, the cut angle and depth can be adjusted easily and accurately.
As the rotational drive source 7 in the present invention, an internal combustion engine such as a gasoline engine or a diesel engine may be used, but an electric motor is preferably used.

In particular, an inverter type motor is preferably used as the electric motor.
That is, in the present invention, a cutting ability capable of cutting the cutting blade 12 having an arc cross section to a depth of 30 cm from the road surface is required. However, if a rotational drive source other than an electric motor is used to satisfy this requirement, An electric motor is optimal in the present invention where a large engine is required and therefore the machine main body must be large and miniaturization is required.

  In addition, the electric motor can be used even at a steep angle, whereas the oil supply method of the engine-type prime mover is generally a fisting type. When used at a steep angle, the oil pan lubricating oil cannot be lifted up. Thus, the engine is seized, but the electric motor has the advantage that it can be used regardless of the inclination.

Moreover, the electric motor has no worry about noise.
In other words, there are many night work on the road, and such work is often troubled by residents' complaints due to noise, but in the case of an electric motor, there is no concern.

  Further, in the road surface cutter 1 according to the present invention, since the rotational speed is determined for each size of the cutting blade 12, in the case of an engine, the speed is adjusted by a governor, but the rotational speed is made accurate. It takes time and effort.

  On the other hand, in the case of an electric motor, by adopting an inverter control system, it is possible to work at an accurate rotational speed simply by setting a frequency corresponding to the rotational speed determined when the cutting blade 12 is attached to the inverter. It becomes possible.

  In the present invention, by using an electric motor as the rotational drive source 7, the overall volume or height of the road surface cutter 1 can be reduced, which can contribute to an improvement in balance. At the same time, it contributes to easy operation and efficiency, and also enables work on steep slopes.

  On the other hand, the configuration of the rotary shaft holding portion 6 that functions as a bearing mechanism of the rotary shaft 5 in the present invention is not particularly limited, and a conventionally known mechanism can be used. Preferably, the rotating shaft 5 is configured to be slidable along the central axis direction of the rotating shaft 5.

  That is, for example, when the road surface around the manhole is cut into a circle, the sizes of the manholes may be different from each other, and the distance between the rotary blade body 12 and the anchor receiving portion 24, that is, should be cut. Since there is a case where the length corresponding to the radius of the circular portion is different, it is necessary to move the rotation shaft 5 by a desired distance in the rotation center axis direction. As a specific example for this, the rotation shaft 5 itself May be adopted, or an appropriate slide plate 30 may be provided on the vehicle body substrate portion 2 and the slide plate 30 may be moved using an appropriate pneumatic or hydraulic cylinder 31. The drive unit holding body 9 itself may be slid to move in the direction of the rotation axis with respect to the vehicle body substrate unit 2, and as a result, the rotation shaft 5 may be moved.

  Further, in the specific example of the road surface cutter 1 according to the present invention, the drive unit 8 is configured such that the rotary shaft holding unit 6 and the rotary drive source 7 are arranged on the same plane. As shown in other specific examples to be described later, the drive unit 8 employs a configuration in which the rotary shaft holding unit 6 and the rotary drive source 7 are vertically stacked. It is also possible.

  On the other hand, in the engagement relationship between the rotary shaft 5 and the rotary drive source in the road surface cutter 1 according to the present invention, the rotary drive source 7 is held via the rotary shaft holding portion 6. A configuration may be adopted in which the rotary shaft 5 is directly joined and the rotary shaft 5 is rotated via an appropriate speed change mechanism in some cases, or the rotary drive source 7 and the rotary shaft are used. You may employ | adopt the structure which rotates the said rotating shaft 5 indirectly with an appropriate power transmission mechanism, for example, a gear mechanism or a belt mechanism, with the said rotating shaft 5 hold | maintained at the holding | maintenance part 6. FIG.

Hereinafter, another specific example of the road surface cutter 1 according to the present invention will be described in detail with reference to the drawings.
3A is a side view showing the configuration of another specific example of the road surface cutter 1 in the present invention, and FIG. 3B is a front view thereof.

4A is a rear view showing the configuration of another specific example of the road surface cutter 1 in the present invention shown in FIG. 3, and FIG. 4B is a rear view thereof. .
That is, in another specific example of the road surface cutter 1 according to the present invention, as shown in FIGS. 3 and 4, the vehicle body board portion 2, the moving traveling provided in the vehicle body board portion 2 is used. Front wheel 3 and rear wheel 4, a rotation shaft 5 having a rotation center axis arranged in the same direction as the arrangement direction of the front wheel 3 and rear wheel 4, and a rotation shaft holding portion 6 for holding the rotation shaft 5 rotatably. A rotation drive source 7 for rotating the rotation shaft 5 and a drive unit 8 composed of the rotation shaft holding unit 6 and the rotation drive source 7 are mounted, and are swingable with respect to the vehicle body substrate unit 2. It is comprised from the drive part holding body 9 arrange | positioned so that contact / separation is possible.

  In this specific example, the difference from the above-described specific example is that in the drive unit 8 constituted by the rotary shaft holding unit 6 and the rotary drive source 7, On top of this, the electric motors that are the rotational drive source 7 are stacked and have a three-dimensional structure.

  Then, an appropriate belt 42 is wound around an appropriate pulley 40 provided on the rotating shaft of the electric motor 7 and an appropriate pulley 41 provided on the rotating shaft 5, and the rotational force of the electric motor 7 is increased. It is configured to transmit to the rotary shaft 5.

  An appropriate attachment / detachment device 43 is provided at the tip of the rotary shaft 5, and the rotary blade body 12 having a cutting blade having an appropriate size and shape required for cutting the road surface is provided. It is desirable to be configured so that it can be easily attached and detached.

  Further, the drive unit holding body 9 in this specific example is constituted by, for example, a U-shaped box-shaped main body portion 91 formed with an opening downward, and the ceiling portion 92 includes bolts and nuts. The rotary shaft holding portion 6 is attached and fixed via an appropriate joint member 93, and the rotary drive source mounting portion 94 fixedly provided on the upper portion of the ceiling portion 92 includes a bolt and a nut. An electric motor which is an appropriate rotational drive source 7 is attached and fixed via 95.

  In this specific example, the main body portion 91 of the drive unit holding body 9 has a rear end portion 96 arranged in a protruding shape on the slide table 30 provided on the vehicle body substrate portion 2. A part of an appropriate support plate 97 and a hinge or an appropriate pivot shaft 98 are pivotally engaged with each other.

Therefore, the main body portion 91 of the drive unit holding body 9 can be turned up and down around the hinge or an appropriate turning shaft 98.
As a result, the rotary drive unit 8 and the rotary shaft 5 mounted on the drive unit holding body 9 integrally swing within an appropriate distance in the vertical direction, as shown in FIGS. 6 to 9. In addition, the positional relationship between the rotary blade body 12 and the road surface S can be adjusted.

  Further, in this specific example, the lower edge portion 102 of the drive unit holder 9 is tapered in order to effectively perform the vertical swinging motion of the drive unit holder 9 in a narrow space. Is provided.

  In this specific example, the swinging operation of the drive unit holder 9 is performed by an appropriate mounting unit 99 provided on the slide table 30 provided on the vehicle body substrate 2 and the motor mounting unit 94. An angle between the drive unit holder 9 and the vehicle body substrate unit 2 is arbitrarily set by operating an appropriate hydraulic cylinder 26 disposed between the appropriate attachment unit 100 provided on the vehicle body. I can do it.

  Further, in this specific example, as shown in FIG. 5, the slide table 30 provided on the vehicle body board portion 2 is operated by an appropriate hydraulic cylinder 31 so that the slide table is moved to the vehicle body board portion. 2 is configured such that it can be moved by an appropriate distance in the direction of the rotation center axis of the rotary shaft 5, and with this configuration, the anchor 20 of the road surface cutter 1 according to the present invention is engaged. The distance between the anchor receiving portion 24 and the rotary blade body portion 12 can be adjusted.

Accordingly, when a circular cut shape is formed on the road surface with the road surface cutter 1, the radius of the circular portion can be easily adjusted.
3 and 4, reference numeral 81 denotes an appropriate frame frame portion, and the front wheel 3 includes a mechanism for fixedly setting the direction of the wheel and a mechanism for setting the direction of the wheel to a free state. Is attached to the vehicle body board portion 2 via an appropriate wheel direction setting mechanism 210 that can arbitrarily select the vehicle body.

On the other hand, the rear wheel 4 is attached to the vehicle body board portion 2 via a mechanism 32 that fixedly sets the direction of the wheel.
Further, as is apparent from the rear view of FIG. 4B, in this specific example, the anchor insertion passage portion 18 that receives and anchors the anchor 20 having the same configuration as that of the specific example and the anchor reception. A portion 24 is provided.

In this specific example, 110 indicates a hydraulic pump, 140 indicates a gear box, and 141 indicates an oil tank.
Furthermore, in this specific example, the road surface cutter 1 can be obtained by manually pushing out an appropriate handle operating portion 111 provided at, for example, the rear end of the main body of the road surface cutter 1 in an oblique direction. 1 can be turned around the anchor receiving portion 24, whereby a circular cutting line having an appropriate radius can be formed by the arc-shaped cutting blade 12.

  On the other hand, in the present invention, since the cutting blade 12 generates high heat when cutting the road surface, it is desirable that the cutting blade 12 is supplied with a liquid containing water as a cooling means. .

  Specifically, the liquid is supplied to a hollow tube portion provided in the axial direction of the rotary shaft 5 in the rotary shaft 5 using the rotary shaft holding portion 6, and the liquid is supplied to the rotary shaft 5. Since the cutting blade 12 is rotated from the vicinity of the fixed portion that fixes the cutting blade 12 at the front end portion thereof and the cutting blade 12 is rotating, the liquid is A uniform liquid film is formed on the inner surface of the cutting blade 12.

  In addition, an appropriate operation panel 131 is configured on the upper end surface of the road surface cutter 1 in this specific example, and controls the rotational speed of the electric motor, the sliding control of the rotating shaft, Control of rear wheel rotational speed, control of rear wheel brake means, control of swing angle of rotary shaft 5, control of cooling water supply to cutting blade 12, or operation control of dust suction device described later Control means such as a key, a button, a lever, and a switch for executing the above are provided.

  Further, the operation panel 131 in this specific example has a cutting depth display means 120 for displaying information indicating the cutting depth of the rotary blade body 12 from the road surface as shown in FIG. It is also desirable that it is provided.

  That is, in the road surface cutter 1 according to the present invention, when the cutting blade 12 having a circular arc cross section is rotated to cut the cutting blade 12 into the road surface to an arbitrary depth, and the road surface is cut into a circle, It is necessary to accurately grasp the depth of cut (depth).

  However, in the road surface cutter 1 according to the present invention, as will be described later, a cover portion (second portion) that covers the entire cutting blade portion for ensuring the safety of the circular cutting cutter 12 and preventing spattering is prevented. In this case, the depth state of the cutting blade 12 cannot be confirmed from the appearance.

  Therefore, in the road surface cutter 1 according to the present invention, a portion where the operation panel 131 of the road surface cutter 1 is arranged so that the operator can easily confirm the cutting depth of the cutting blade 12 from the road surface. It is desirable to provide the cutting depth display means 120 in the vicinity of.

In the cut depth display means 120, a spring 122 is suspended from above in a hollow main body 121, and an appropriate gauge portion 123 is attached to the lower end thereof.
The gauge portion 123 is fitted so as to be slidable in a vertical slit portion 124 provided in a predetermined portion of the main body portion 121.

  A wire rope 125 having an appropriate thickness is attached to the lower end portion of the gauge portion 123, and the other end portion of the wire rope 125 is rotated and driven as shown in FIGS. The wire rope 125 is attached and fixed to a part of the source 8 and moves the gauge part 123 downward against the elastic force of the spring 122 according to the up-and-down swinging motion of the drive part holding body 9. The gauge portion 123 is designed to be raised according to the elastic force of the spring 122.

  Therefore, the moving position of the gauge part 123 is cut by adjusting the elastic force of the spring 122 and the tension related to the wire rope 125 that is generated when the drive part holding body 9 swings up and down. Since it is possible to accurately correspond to the actual depth dug from the road surface S of the blade 12, the operator can easily arrange the scale indicating the predetermined depth along the slit portion 124 so that the operator can easily perform the cutting blade. Accordingly, it is possible to accurately know the digging depth at the present time of 12, and to appropriately execute the rotation speed of the cutting blade 12 or the hydraulic control of the hydraulic cylinder.

  Next, in this specific example, since the road surface cutter 1 is used at a road construction site, the internal structure of the road surface cutter 1 and the safety to the operator during the operation of the internal mechanism. To protect the internal structure or internal mechanism of the road surface cutter 1 from crushed materials such as water, mud, dust, concrete or stone generated at the construction site. Since it is necessary to show the appearance of the cutter 1 beautifully, an appropriate cover portion is provided for the road surface cutter 1.

  That is, in the road surface cutter 1 according to the present invention, the rotation shaft of the rotation drive source 7 which is a rotation drive force transmitting portion provided between the rotation drive source 7 and the rotation shaft 5. A first pulley 40, a second pulley 41 provided on the rotary shaft 5, and a first cover portion 50 covering the belt 42 engaged with both pulleys are provided.

  In the first cover portion 50 according to the present invention, a third pulley 52 provided on the rotating shaft 54 of the hydraulic pump 110 provided on the electric motor 7 and a third pulley 52 are provided. And the extension cover part 51 which coat | covers the belt 53 engaged with both of the said 1st pulleys 40 may be comprised integrally.

  In addition, a pair of upper ends extending along the side walls of the first cover portion 50 at the free ends of the support portions 55 and 56 extending left and right at the lower portion of the first cover portion 50. The second cover part supports 57 and 58 are provided, and the pair of supports 57 and 58 of the support parts 55 and 56 are side walls of the second cover part that covers the cutting blade 12 described later. The second cover portion holding means 61 and 62 provided in the first and second cover portions 62 and 62 are inserted, and the second cover portion is detachably and slidably held.

  The pair of supports 57 and 58 can also be provided on the slide table 30 in the road surface cutter 1 or the front end portion of the vehicle body substrate 2 or the drive unit holder 9.

  On the other hand, in the road surface cutter 1 according to the present invention, the second cover portion 60 that covers the rotary blade body portion 12 is provided, and the first cover portion 60 has the first cover portion 60. On a part of the back wall 64 facing the cover, the slide table 30 in the road surface cutter 1 or the front end of the vehicle body substrate 2 or the drive unit holder 9 or the first cover 50 is provided. Second cover holding means 61 and 62 are provided which are slidably and detachably fitted to the pair of support rods 57 and 58 provided in part.

Furthermore, the second cover portion 60 in this specific example is provided with a front wall portion 67 through a peripheral wall portion 66 having an appropriate width so as to face the back wall portion 64.
In addition, a plurality of gripping means 68 are arranged at appropriate intervals on the peripheral wall portion 66 of the second cover portion 60 so that the operator can carry and make the work more efficient. A nozzle that supplies water for cooling the cutting blade 12 may be provided on a part of the peripheral wall portion 66.

Further, a slit portion 65 through which the rotary shaft 5 is inserted is provided from the lower end of the center portion of the back surface wall portion 64 of the second cover portion 60 upward.
Furthermore, in order to vacuum-suck dust, fine crushed stone, mud, soil, other crushed materials, etc. generated by road surface cutting work on the left and right ends of the lower end portion of the second cover portion 60 in this specific example. A dust suction means 70 having a suction duct 71 is detachably provided or swingable using an arbitrary mechanism such as a pinning mechanism, and an appropriate portion is provided on the lower surface of the dust suction means 70 facing the road surface. Friction reducing means 72 for reducing friction between the lower end portion of the dust suction means 70 such as a rotating roller, a bearing, and a caster and the road surface is provided.

It is desirable that the friction reducing means 72 is also attached to the peripheral edge of the lower end portion of the second cover portion 60 through a pinning method or an arbitrary swing mechanism.
With this configuration, the second cover portion can be smoothly circulated according to the circular motion of the main body portion of the road surface cutter 1.

  The dust suction means 70 is preferably in a state in which the second cover part 60 is always in contact with the road surface S. For this reason, the second cover part 60 is located above and below the drive part holding body 9. When swaying, the slider is configured to slide along the rod-like supports 57 and 58.

Therefore, for example, when the drive unit holding body 9 is displaced to a position as shown in FIG. 9 or FIG. 7, the second cover unit 60 is not maintained in a state perpendicular to the road surface. In this case, the vehicle is inclined at a predetermined angle with respect to the road surface.
In this case, either the front end portion or the rear end portion at the lower end portion of the second cover portion 60 is separated from the road surface, and a gap is generated.

Therefore, the dust suction means 70 can prevent a gap with the road surface from being generated at the end of the dust suction means 70 by adopting a swing mechanism or the like.
On the other hand, in order to prevent a gap with the road surface as described above from occurring at the lower end portion of the second cover portion 60, for example, as shown in FIG. A flexible sheet 73, 74 made of a material having flexibility, for example, rubber or a synthetic resin such as vinyl chloride, urethane, or the like, is formed on a part of the lower end part or on the entire periphery. It is attached so that it hangs down from a part of the part, or plate-like bodies 73 and 74 made of a hard sheet made of synthetic resin or an appropriate metal material are inserted and arranged so as to be slidable in the vertical direction. Therefore, the generation of the gap may be prevented.

  As shown in FIG. 14, it is also preferable to provide a third cover portion 130 that covers the whole or a part of the outer surface of the road surface cutter 1 in the present invention. For example, FIG. It is possible to provide a cover portion 130 so as to cover substantially the entire main portion of the road surface cutter 1 along the frame portion 81 shown in FIG. 1, that is, the vehicle body substrate portion 2 and the rotation drive source 7. A third cover portion 130 that covers the rotating shaft holding portion 6 and the like is provided, and the appropriate control operation portion 131 and a part of the third cover portion 130, particularly the upper surface portion thereof, are provided. It is desirable that the above-described cutting blade cutting depth display section 120 and the like are arranged.

FIG. 1 is a side view showing the configuration of a specific example of a road surface cutter in the present invention. FIG. 2 is a back view of the specific example of the road surface cutter in the present invention shown in FIG. FIG. 3 is a side view and a front view showing the configuration of another specific example of the road surface cutter in the present invention. 4 is a rear view and a rear view showing the configuration of another specific example of the road surface cutter in the present invention shown in FIG. FIG. 5 is a side view showing the configuration of another specific example of the road surface cutter in the present invention. FIG. 6 is a side view for explaining the moving state of the cutting blade in another specific example of the road surface cutter in the present invention. FIG. 7 is a side view for explaining the moving state of the cutting blade in another specific example of the road surface cutter in the present invention. FIG. 8 is a side view for explaining the moving state of the cutting blade in another specific example of the road surface cutter in the present invention. FIG. 9 is a side view for explaining a moving state of the cutting blade in another specific example of the road surface cutter in the present invention. FIG. 10 is a diagram showing a configuration of a specific example of the second cover portion used in the road surface cutter in the present invention. FIG. 11 is a diagram showing the configuration of a specific example of the first cover portion used in the road surface cutter in the present invention. FIG. 12 is a diagram showing a configuration example of a specific example of the suction device used in the road surface cutter in the present invention. FIG. 13 is a diagram showing a specific example of a cutting depth display device for a cutting blade used in the road surface cutter in the present invention. FIG. 14 is a perspective view showing an appearance of a road surface cutter in the present invention.

Explanation of symbols

1. 1. Road surface cutter 2. Car body board part Front wheel 4. Rear wheel Rotating shaft 6. Rotating shaft holding part 7. Rotation drive source, electric motor Drive unit 9. Drive unit holder 10. 10. One end of the rotation shaft 11. The other end of the rotating shaft Cutting blade, rotary blade body 13. 13. Front end of vehicle body board 14. Front end portion of drive unit holder 15. Rear end portion of drive unit holding body 9 Center of rotation 17. 18. Rear end of vehicle body board part Anchor insertion passage part 19. End portion of anchor insertion passage portion 20. Anchor 21. Anchor fixing grip 23. Opening 24. Anchor receiving portion 25. Chuck mechanism 26. Fluid cylinder 30. Slide plate 31. Fluid cylinder 97. Support plate

Claims (11)

  The vehicle body board portion, the front and rear wheels for moving traveling provided on the body board portion, a rotation axis having a rotation center axis arranged in the same direction as the arrangement direction of the front wheel and the rear wheel, and the rotation axis A rotary shaft holding portion that is rotatably held, a rotational drive source for rotationally driving the rotational shaft, and a drive portion configured by the rotational shaft holding portion and the rotational drive source are mounted, and the vehicle body substrate portion It is composed of a drive unit holding body arranged so as to be able to contact and separate, and one end of the rotation shaft is directly or indirectly engaged with the rotation drive source via the rotation shaft holding unit. And a rotary blade body portion provided with a cutting blade at the other end portion of the rotating shaft is detachable in a state of extending from the front end portion of the vehicle body substrate portion or the driving portion holding body. And the rear end of the drive unit holder is The moving part holding body is provided so as to be capable of turning about a turning center provided at a predetermined portion of the vehicle body substrate portion so that the front end portion forms an arbitrary angle with respect to the vehicle body substrate portion. In addition, an anchor insertion passage portion formed from the rear end portion of the vehicle body substrate portion toward the inside of the vehicle body substrate portion is provided, and the anchor fixing grip is provided at a terminal portion of the anchor insertion passage portion. Road surface cutter, characterized in that a part is provided.   2. The road surface cutter according to claim 1, wherein the rotation shaft is configured to be slidable in the central axis direction of the rotation shaft via the rotation shaft holding portion.   The rotary blade body portion is one selected from a flat plate-like rotary blade body portion provided with a cutting blade and a cross-section arcuate rotary member provided with a cutting blade. The road surface cutter described.   The road surface cutter according to any one of claims 1 to 3, wherein a first cover portion is provided at a joint portion between the rotational driving force transmitting portion of the rotational driving source and the rotational shaft.   A second cover portion that covers the rotary blade body portion is provided, and the second holding portion or the front end portion of the driving portion holding body or a part of the first cover portion is provided with the second cover portion. The road surface cutter according to any one of claims 1 to 4, further comprising a second cover portion support body that slidably and detachably holds the cover portion.   The lower end portion of the second cover portion is configured to be disposed at a position close to the road surface, and at least part of the lower end portion of the second cover portion reduces friction with the road surface. A road surface cutter according to any one of claims 1 to 5, wherein friction reducing means is provided.   A second cover part holding means that engages with the second cover part support and a slit part through which the rotary shaft is inserted are provided on the wall part of the second cover part that faces the rotational drive source. The road surface cutter according to claim 5 or 6, wherein:   2. A third cover part that covers at least the vehicle body board part and the rotation drive source is provided, and a control operation part is arranged in a part of the third cover part. The cutter for road surfaces in any one of thru | or 7.   9. The road surface cutter according to claim 8, wherein the control operation unit is provided with a cutting depth display means for displaying information indicating a cutting depth of the rotary blade portion from the road surface.   At least one of the front wheel and the rear wheel is provided with a selection mechanism that can selectively adopt either a state in which the direction of the wheel is fixed or a state in which the direction of the wheel is freely determined. A road surface cutter according to any one of claims 1 to 9.   The planar shape of the vehicle body substrate portion and the wheel is such that all of the plane outline formed by the vehicle body substrate portion and the wheel is always present inside the circular shape formed by the rotary blade body portion. The road surface cutter according to claim 1, wherein the road surface cutter is set.