JP2000314106A - Grinder for erasing indication coating from road surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove indication coating, simplify construction, reduce the weight of car body and the cost by enhancing the ability to travel straight and suppressing a force in a lateral direction generated by the rotation of a cutter. SOLUTION: Axle shaft 1a of a front wheel 1 is borne by a bracket 9. A vertical rod 10 is provided in a raised shape at the center position on the top surface between front wheels 1 of a bracket 9. A vertical rod 10 is inserted and fitted to a holder portion 11 formed in a central portion in a freely movable manner up and down at the front side of a car body 3. A holder portion 11 has a built-in coil spring 12 for urging the front wheel 1 to the road surface 7 and also has an externally operable height adjusting member 13 for positioning the height of the upper end in the holder portion 11 of the vertical rod 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinder for erasing road surface paint, and more particularly to a grinder for erasing (removing) road lane markings with a rotating cutter, for example, by pushing and pulling on a road. The present invention relates to a grinder for erasing formed road surface display paint.

[0002]

2. Description of the Related Art Conventionally, as this type of grinding machine, for example, as described in Design Registration No. 913135, a method of rotating a vertical axis as a center to delete a display paint on a road surface is described below. There is one provided with a member (hereinafter referred to as Conventional Example A).

A conventional grinding machine of this type is disclosed in
There is an invention described in Japanese Patent Application Publication No. 204822 (hereinafter referred to as Conventional Example B). This conventional example B has a cutter section (a deletion tool).
Is provided on a vertically movable frame, and a mechanism for keeping the body frame constant even when the cutter portion is pushed up by grinding resistance or the like is provided.

[0004]

A grinder of this type grinds, cuts, and deletes a display paint on a road surface or a floor surface by a cutter (removal tool) which rotates in one direction about a vertical axis. Therefore, the grinding resistance and the cutting resistance generated at that time appear as a force for moving the vehicle body in the lateral direction separately from the forward direction.

This force is caused by moving the handle in the lateral direction with the rear wheel as a fulcrum.
The operator had to work while holding down the handlebars and moving the body straight against this force. Therefore, this conventional example A
The use of such a grinding machine has the problem that a large amount of arm and labor is required for operating the steering wheel.

In the prior art B, the mechanism for keeping the body frame constant can eliminate the lateral force caused by the rotation of the cutter unit. However, in the case of this conventional machine, the number of components is large and the structure is large. This inevitably increases the size and weight of the vehicle body and increases manufacturing costs.

The present invention has been proposed in view of such problems of the conventional machine. Therefore, a technical problem of the present invention is that the lateral force generated by the rotation of the cutter unit can be suppressed, the straightness can be enhanced, and the display paint can be removed easily and lightly. It is an object of the present invention to provide a grinder for erasing paint for a road surface display, which is formed so as to be simple and capable of reducing the weight and cost of a vehicle body.

[0008]

The present invention employs the following technical means in order to solve the above-mentioned problems.

That is, according to the present invention, as shown in FIG. 1, a display paint on a road surface 7 is rotated by rotating about a vertical axis below a vehicle body 3 on which a pair of left and right front wheels 1 and a rear wheel 2 are mounted. A grinder for erasing road surface display paint comprising a deletion member 6 to be deleted, wherein an axle 1a of the front wheel 1 is supported by a bracket 9, and a vertical rod 10 is provided at a central position of an upper surface between the front wheels 1 of the bracket 9. The vertical rod 10 is vertically movably inserted into a holder 11 formed at the front center of the vehicle body 3, and biases the front wheel 1 on the road surface 7. A coil spring 12 is built in and the upper end 1 of the vertical rod 10 in the holder 11 is
An externally operable height adjusting member 13 for positioning the height of 0a is provided (claim 1).

Here, as the deleted member 6, the super hard member 6
a (see FIG. 2), there is a fixed member having a cutting edge 6b made of sintered diamond fixed thereto, and a rotary member having a pin for striking a road surface on its peripheral surface and rotating about a horizontal axis.

As shown in FIG. 2, the height adjusting member 13 includes, for example, a bolt-shaped shaft 13a screwed to the top surface of the holder portion 11, and an operation knob 13b fixed on the upper portion of the shaft 13a. Preferably, a shaft 13a is provided at the axis of the holder portion 11, and the upper end 10a of the vertical rod 10 can be locked at the lower end of the shaft 13a. However, in the case of the present invention, the configuration of the height adjusting member 13 is not limited to this.

Further, in the present invention, instead of the coil spring 12 being built in the holder portion 11, as shown in FIG.
May be provided between the lower end of the bracket 9 and the upper surface of the bracket 9 (claim 2).

In this case, a coil spring 12 having a larger diameter than the holder 11 can be used, and the coil spring 12 can be selected without being influenced by the inner diameter of the holder 11.

Further, the present invention includes a holding mechanism 14 for arranging the front wheel 1 above the road surface 7, and the holding mechanism 14
A lever 14 which is attached to the vehicle body 3 via a horizontal shaft 15 so as to be rotatable back and forth, and which supports the bracket 9 with a lower claw 14a1.
a and a spring 14b for urging the lower portion of the lever 14a toward the bracket 9 side (claim 3).

In this case, since the work can be performed while the front wheel 1 is lifted off the road surface 7 by the holding mechanism 14, the removing member 6 can be swung by the swing operation of the handle 4 using the rear wheel 2 as a fulcrum as required. And can be deleted broadly. Therefore, according to this, there is an advantage that usability is further improved.

Also, according to the present invention, the lower end 14a of the lever 14a is provided.
It is preferable that 2 is formed in a bent shape in front of the vehicle body 3 so that the lower surface of the bracket 9 can be locked freely.

In this case, the height adjusting member 13 is operated,
When adjusting the distance between the removing member 6 and the road surface 7, the bracket 9 can be locked to the lower end portion 14a2 of the lever 14a.
It is possible to prevent a situation in which the player falls out of 1.

[0018]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1 and the like, 1 is a pair of left and right front wheels, and 2 is a pair of left and right rear wheels. The front wheel 1 and the rear wheel 2 are attached to the front and rear positions of the vehicle body 3. In addition, 4
Reference numeral denotes a steering wheel connected to the vehicle body 3, and reference numeral 5 denotes an engine mounted on the vehicle body 3.

Reference numeral 6 denotes a removing member that rotates around a vertical axis to remove the display paint on the road surface 7. This deleted member 6
The cemented carbide member 6a (see FIG. 2) is provided below the vehicle body 3 and is provided with a cutting edge 6b made of sintered diamond. A plurality of the removing members 6 are provided at the radial positions of the rotating base plate 8 (see FIG. 1 and the like) with the cutting blade 6b facing down.

The axle 1a of the front wheel 1 is supported by a bracket 9. The bracket 9 is formed in a U-shaped cross section, and is formed so that a longitudinal opening surface 9a (see FIG. 2) faces the rear of the vehicle body 3 and the axle 1a is supported at a side end 9b.

Reference numeral 10 denotes a vertical rod provided at the center of the upper surface between the front wheels 1 of the bracket 9 in an upright manner. The vertical rod 10 is inserted into a holder 11 formed at the front center of the vehicle body 3 so as to be vertically movable. Holder part 1
Reference numeral 1 denotes a cylindrical pipe having a large thickness in this embodiment, and is formed so that a load is applied to the front wheel 1.

Reference numeral 12 denotes a coil spring for urging the front wheel 1 against the road surface 7. In this embodiment, the coil spring 12 is housed in the holder 11 in a state where the coil spring 12 is mounted on a shaft 13a of a height adjusting member 13 described later.

The height adjusting member 13 is for positioning the height of the upper end 10a (see FIG. 2 and the like) in the holder portion 11 of the vertical rod 10, and is formed to be operable externally. In the case of this embodiment, specifically, the height adjusting member 13 is a bolt-shaped shaft 1 screwed to the top surface of the holder 11.
3a and an operation knob 13b fixed to the upper portion of the shaft 13a. The shaft 13a is disposed at the position of the axis of the holder portion 11, and the lower end of the shaft 13a locks the upper end 10a of the vertical rod 10.

Reference numeral 14 denotes a holding mechanism for disposing the front wheel 1 above the road surface 7. As shown in FIG. 6 and the like, the holding mechanism 14 is attached to the vehicle body 3 via a horizontal shaft 15 so as to be able to rotate back and forth, and supports a bracket 9 with a lower claw 14a1. And a spring 14 b for urging the bracket 9 toward the bracket 9. In the case of this embodiment, the spring 1
4b has one end attached to the upper part of the lever 14a, and is disposed so as to constantly pull the upper part of the lever 14a to the rear of the vehicle body 3.

In this embodiment, the lower end 14a2 of the lever 14a is formed in a bent shape in front of the vehicle body 3, and the lower surface 9c of the bracket 9 is formed so as to be freely engageable. Therefore, the present invention of this embodiment can prevent the front wheel 1 from falling off together with the bracket 9 when the vehicle body 3 is lifted.

Next, the operation of the present invention will be described. In the case of the present invention, at the time of work, as shown in FIGS. The present invention relates to a coil spring 1
Due to the action of 2, the vehicle runs with the front wheel 1 in close contact with the road surface 7. Therefore, even if the deleted member 6 receives resistance or impact with the road surface 7 and is pushed up by unevenness of the road surface 7, the vehicle body 3 moves straight without taking the handle 4 in the rotation direction of the deleted member 6.

Further, according to the present invention, the height adjusting member 13
You can change the depth to delete. Specifically, for example, as shown in FIG. 5, when the height of the upper end 10 a in the holder portion 11 of the vertical rod 10 is reduced (the upper end 10
If the distance between a and the top surface in the holder 11 is increased,
As a result of the removal member 6 being separated from the road surface 7 together with the vehicle body 3, the display paint can be removed by that amount.

Conversely, when it is desired to cut the road surface 7 deeply, the knob 13b is loosened and the shaft 13a exposed from the holder portion 11 is removed.
Increase the length of. In this case, the holder 1 of the vertical rod 10
Since the height of the upper end 10a in 1 increases (because the distance between the upper end 10a of the vertical rod 10 and the top surface in the holder 11 decreases), the deletion member 6 approaches the road surface 7 together with the vehicle body 3. As a result, the display paint can be deeply deleted.

Further, in the present invention, the holding mechanism 14
6, the front wheel 1 can be lifted and removed as shown in FIG. In this case, the operator first loosens the knob 13b from the state shown in FIG.
The upper part of the lever 14a is rotated to the front of the vehicle body 3, and the lower part of the lever 14a is rotated to the rear (see the broken line in FIG. 6).

Thereafter, the operator lifts the front wheel 1 together with the bracket 9, and then releases the lever 14a. Then, the lever 14a returns by the pulling force of the spring 14b,
The bracket 9 is supported by the lower claw 14a1 (see the solid line in FIG. 6).

Therefore, according to the present invention of this embodiment, not only can the front wheel 1 be brought into close contact with the road surface 7 so that the front wheel 1 can be deleted in a state where the straightness is enhanced, but also at the place where the display paint spreads in the lateral direction, the holding mechanism 14 is used. The swing operation of the handle 4 allows the removing member 6 to swing around the rear wheel 2 as a fulcrum, thereby enabling wide removal.

[0033]

As described above, according to the present invention, the front wheel is urged to the road surface by the coil spring built in the holder portion so that the front wheel can be brought into close contact with the road surface and pushed and pulled.

Therefore, in the case of the present invention, even if the deleted member is pushed up by the unevenness of the road surface, the front wheel can catch the road surface and run in close contact with the road surface, and the front wheel supports the lateral force due to the rotation of the deleted member. It becomes possible. As a result, if this is used, the straightness is improved, and the handle is difficult to be taken in the lateral direction, so that the labor required to press the handle in the past can be reduced, without giving a physical burden to the operator,
You can work easily. Further, according to the present invention, the structure is simple and the number of parts can be reduced correspondingly, so that the weight and cost of the device can be reduced.

[Brief description of the drawings]

FIG. 1 is a main part side view showing a preferred embodiment of a grinding machine of the present invention.

FIG. 2 is a sectional view of a main part of the grinding machine;

FIG. 3 is a perspective view of the grinding machine;

FIG. 4 is a front view of the same grinding machine.

FIG. 5 is a fragmentary sectional view for explaining the operation of the grinding machine;

FIG. 6 is a fragmentary sectional view for explaining the operation of the grinding machine;

FIG. 7 is a cross-sectional view of a principal part showing another embodiment of the grinding machine;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front wheel 1a Axle 2 Rear wheel 3 Body 6 Deletion member 7 Road surface 9 Bracket 10 Vertical rod 10a Upper end 11 Holder part 12 Coil spring 13 Height adjustment member

Claims (4)

[Claims] 1. A grinding device for erasing road surface display paint, comprising: a deleterable member for rotating around a vertical axis to delete a road surface display paint, below a vehicle body to which a pair of left and right front wheels and rear wheels are attached. The axle of the front wheel is supported by a bracket, and a vertical rod is provided in an upright shape at the center of the upper surface between the front wheels of the bracket, and the vertical rod is mounted on a holder formed at the front center of the vehicle body. The holder is provided with a coil spring that is movably inserted up and down and urges the front wheel against a road surface, and the height of the vertical rod is adjusted by an external operation so that the height of the upper end in the holder can be adjusted. A grinding machine for erasing road surface paint, comprising a member. 2. The grinder for erasing road surface paint according to claim 1, wherein the coil spring is mounted on a vertical rod instead of having the coil spring built in the holder, and the lower end of the holder and the upper surface of the bracket. And a grinding machine for erasing road surface paint. 3. The grinding machine for erasing road surface paint according to claim 1, further comprising a holding mechanism for arranging the front wheels above the road surface, wherein the holding mechanism is connected to the vehicle body via a horizontal shaft. A lever for supporting the bracket with a lower claw and rotatably biasing the lower portion of the lever toward the bracket. Grinding machine. 4. A grinding machine for erasing road surface paint according to claim 3, wherein the lower end of the lever is formed in a bent shape in front of the vehicle body, and the lower surface of the bracket is formed so as to be freely engageable. Grinder for erasing road surface paint.