JPH076208Y2 - Leveling work vehicle - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leveling work vehicle for leveling a road surface or a school playground.

[0002]

2. Description of the Related Art A general structure of a conventional leveling work vehicle (grader) is shown in FIG. The leveling work vehicle has a main body 72 having an engine portion 71, and a nose 73 attached to the front portion of the main body 72 so as to be rotatable left and right. A front wheel 74 for steering is provided at the tip of the nose 73, and a rear wheel 75 is provided at the main body 72. At the nose intermediate portion between the front wheel 74 and the rear wheel 75, there is an earth-draining plate 76 that can be adjusted up and down, and a crushing device 77 is provided in front of it. The driver's seat 78 is located on the upper side of the front of the main body 72, that is, at a relatively high position slightly obliquely rearward of the earth discharging plate 76.

[0003]

However, the above-mentioned conventional leveling work vehicle has the following problems. That is, in leveling work using a leveling work vehicle, after roughly finishing a work surface such as a playground or the like, a water thread is stretched, and a measuring operator measures heights of various points on the work surface with reference to the water thread. . Then, the operator of the leveling work vehicle, in accordance with the support of the measurement operator, raises and lowers the soil discharge plate to scrape off the high part of the work surface and level it. In this work, in the conventional leveling work vehicle, since the driver operates the soil discharging plate while looking down from the driver's seat, it is difficult to confirm the height of the soil discharging plate with respect to the work surface. In addition, the unevenness of the work surface is difficult to understand, so it is difficult to measure the timing for lowering the soil discharge plate. For this reason, even a considerably skilled driver has to grind the same work surface many times, and it takes time to obtain the required accuracy.

[0004]

Means for Solving the Problems The means of the present invention taken to solve the above problems are as follows. According to a first aspect of the present invention, there is provided a leveling work vehicle having a dump plate, wherein the leveling plate is provided closer to a rear wheel than an intermediate portion between front wheels and rear wheels. The driver's seat is a leveling work vehicle that is provided on the rear side of the rear wheel and on a seat that extends at substantially the same height as the axle of the rear wheel. According to a second aspect of the present invention, there is provided a leveling work vehicle having an earth discharging plate, wherein the leveling plate is provided closer to a rear wheel than an intermediate portion between front wheels and rear wheels. , The driver's seat is provided on the rear side of the rear wheel and on a seat that extends to approximately the same height as the axle of the rear wheel, and the driver's seat is provided with a roof portion,
This roof is a leveling work vehicle having height adjusting means.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is a side view showing an embodiment of the leveling work vehicle of the present invention, and FIG. 2 is a plan view. Reference numeral A is a leveling work vehicle having a frame 1. A front wheel 2 and a rear wheel 3 are provided at the front and rear of the frame 1. The axles 20, 30 of the front wheels 2 and the rear wheels 3 are inserted through bearings 21, 31. The central portion of the axle 21 of the front wheel 2 is attached to the front portion of the frame 1 so as to be horizontally rotatable, and the front wheel 2 is rotated and steered by the steering cylinder S1. In the leveling work vehicle A, the front wheels 2 and the rear wheels 3 have drive shafts 22, 3
It is a front-rear wheel drive type that is driven via 2. The symbol M
Is a hydraulic motor that drives the drive shafts 22 and 32. An earth-discharging plate 4 is provided in the lower portion of the frame 1, slightly closer to the rear wheel 3 than the intermediate portion between the front wheels 2 and the rear wheels 3. Earth plate 4
Is pivotally attached to the tip of the rotating arm 40 and is moved up and down by an elevating cylinder S2.

A driver's seat 5 is provided at the rear end of the frame 1. The driver's seat 5 has a seat 50, and the seat 50 has an axle 30.
It is provided so as to extend rearwardly. The height of the seat 50 is set to be substantially the same as the height of the axle 30, and the seat 51 is installed on the seat 50. In the present embodiment, the angle between the work line G and the position line P connecting the lower rear end of the soil discharging plate 4 and the rear end of the seat surface of the seat 51 is set to about 15 °, but this is not the only option. However, the angle of the position line P can be arbitrarily set within the range of 10 ° to 30 °. Further, the horizontal distance between the lower rear end of the soil discharging plate 4 and the rear end of the seat surface of the seat 51 is about 2.3 m, but it can be arbitrarily set within the range of up to about 5 m. The seat 50 is provided with a roof portion 6. The roof portion 6 has two columns 60 whose upper side is rotatable, and a tent 61 is provided above the columns 60.
Is pivotally mounted so that it can rotate. The symbol B is a body.

(Operation) The operation of this embodiment will be described with reference to FIGS. 1 and 2. Driver's seat 5 is drive shaft 3
It is provided at the rear end that does not get in the way of the drive system such as 2.
As a result, the height of the seat 51 can be set to about 1/2 lower than that of the conventional leveling work vehicle. When the driver sits on the seat 51, the eye level of the driver is considerably lower than that in the case of the conventional leveling work vehicle, and the height of the soil discharge plate 4 with respect to the work surface G can be easily confirmed. Has become. In the leveling work, as in the conventional case, first, the work surface such as a playground is roughly finished, and then a water thread is stretched, and the measuring operator measures the height of each part of the work surface G based on this water thread. . Then, the operator of the leveling work vehicle A follows the support of the measurement operator to raise and lower the soil discharge plate 4 to scrape off the high part of the work surface G and level it. In this work, the driver does not operate the soil discharge plate while looking down from a high driver's seat like a conventional leveling work vehicle, but operates from the lower rear position while not looking down so much while looking forward. It will be. Therefore, not only the height of the soil discharging plate 4 with respect to the work surface G can be easily confirmed, but also the unevenness of the working surface G can be easily understood, and the timing for lowering the soil discharging plate 4 can be easily measured.

The soil discharging plate 4 is provided closer to the rear wheel 3 than the intermediate portion between the front wheel 2 and the rear wheel 3. According to this structure,
The earth removing plate 4 is less susceptible to the vertical movement of the front wheels than the vertical movement of the rear wheels. In other words, in the leveling work, the soil discharge plate 4 is less likely to be affected by the front wheels 2 that frequently pass through the work surface G having large unevenness that has not been leveled yet, and rather the rear wheels 3
Will be more susceptible to. However, the rear wheel 3 is once leveled by the earth-discharging plate 4, and the work surface G with relatively small unevenness is provided.
Since it passes through, the vertical movement is small compared to the front wheel 2. Therefore, when viewed comprehensively, the vertical movement of the soil discharge plate 4 during the leveling work is higher than that in the case where the soil discharge plate 4 is located in the middle portion of the front wheels 2 and the rear wheels 3 or closer to the front wheel 2 than the middle portion. Fewer, high-precision finishing can be done with a small number of times. According to the trial, even if the level of skill of the driver is not so high, it is possible to perform leveling work with the same accuracy as that of the skilled worker in a shorter work time compared to the case of using the conventional leveling work vehicle. It was It was also found that, with some skill, even if the measurement operator does not specifically indicate the correction value in units of centimeters, highly accurate leveling work can be performed only by eye measurement. Therefore, if priority is given to leveling work by visual measurement based on experience, the measurement and instruction work can be simplified, and the work can be performed with a smaller number of workers, and the construction cost can be reduced. it can. If the support 60 is bent and the roof 6 is folded and lowered as needed, it is possible to perform a leveling work through a work surface G having a limited upper height, such as a bar or a ladder. The present invention is not limited to the illustrated embodiment, but various modifications can be made within the scope of the claims for utility model registration.

[0009]

The present invention has the above-mentioned structure and has the following effects. (A) Since the driver's seat is provided behind the rear wheel axle of the leveling work vehicle, that is, at a place where it does not interfere with the drive system, the height of the seat can be set lower than that of the conventional leveling work vehicle. The eye level of the worker is also lowered, and it becomes easier to check the height of the soil discharge plate with respect to the work surface. Therefore, in leveling work, the driver does not operate the soil discharge plate while looking down from a high driver's seat as in a conventional leveling work vehicle, but from the lower rear position without lowering the line of sight so much that the driver can move forward. You can operate while watching. Therefore, it is easy to check the height of the earth removal plate with respect to the work surface, and it is easy to understand the unevenness of the work surface, and it is easy to measure the timing for lowering the earth removal plate. (B)
Since the soil discharging plate is provided closer to the rear wheel than the middle portion between the front wheel and the rear wheel, the soil discharging plate is less susceptible to the vertical movement of the front wheel than the vertical movement of the rear wheel. In other words, in the leveling work, the soil discharge plate is less likely to be affected by the front wheels and is more likely to be affected by the rear wheels, which is more likely to pass through the work surface having large unevenness which has not been leveled yet. However, since the rear wheel passes through the work surface with relatively small unevenness once leveled by the soil dumping plate, the vertical movement is originally smaller than that of the front wheel. Therefore, as a whole, compared with the case where the soil discharge plate is in the middle of the front and rear wheels or closer to the front wheels than the middle, the vertical movement of the soil discharge plate during leveling work is less and High-precision finishing is possible. As a result, even if the level of skill of the driver is not so high, the leveling work with the same accuracy as that of the skilled worker can be performed in a shorter work time as compared with the case of using the conventional leveling work vehicle. Also, with a certain degree of skill, it becomes possible to perform high-precision leveling work only by eye measurement without requiring the measurement operator to specifically specify the correction value in centimeters, and it is possible to carry out construction with a smaller number of personnel, which reduces the construction cost. Can be made cheaper.
(C) If the height of the roof of the driver's seat can be adjusted, if the roof is lowered as necessary, it will pass through a work surface such as a horizontal bar or a ladder that has a limited upper height. All leveling work is also possible.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a leveling work vehicle of the present invention.

FIG. 2 is a plan view showing an embodiment of the leveling work vehicle of the present invention.

FIG. 3 is a side view showing a general structure of a conventional leveling work vehicle.

[Explanation of symbols]

 A Leveling work vehicle 2 Front wheel 3 Rear wheel 30 Axle 4 Exhaust plate 5 Driver's seat 50 Seat base 6 Roof

Claims (2)

[Scope of utility model registration request] 1. A leveling work vehicle having a soil discharging plate, wherein the leveling work vehicle is provided closer to a rear wheel than an intermediate portion between front wheels and rear wheels, and a driver's seat is A leveling work vehicle that is provided on a seat extending rearward of the rear wheel and at substantially the same height as an axle of the rear wheel. 2. A leveling work vehicle having an earth discharging plate, wherein the leveling work plate is provided closer to the rear wheels than the middle portion between the front wheels and the rear wheels, and the driver's seat is , A rear side of the rear wheel and a seat that extends at substantially the same height as the axle of the rear wheel.The driver's seat is provided with a roof, and the roof is height-adjusted. Having means, leveling work vehicle.