JP2012067505A - Self-propelled ground roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-propelled ground roller in a simple structure, capable of executing uniform compaction to the entire surface of the ground.SOLUTION: For the self-propelled ground roller, a front car body having a front wheel and a rear car body having a rear wheel are connected by a pin connection system to configure a traveling car body, and both of the front and rear wheels are configured to act as compaction rollers. Also, a drive part for driving the front wheel in the front car body includes an engine, a hydraulic pump rotated by the engine, a hydraulic conduction device activated by the hydraulic pump, and a traveling motor driven by the hydraulic conduction device to rotate the front wheel.

Description

  The present invention relates to a self-propelled ground roller that can maintain the ground by rolling the ground with a rolling roller.

  Grounds covered with soil, such as baseball fields, soccer fields, rugby fields, tennis courts, schoolyards, etc., become stiffer when used and stepped. If you continue to use it as it is, it will become very hard and you will be injured.

  A ground leveling machine (a machine for maintaining the ground) is generally used in order to return the ground, which has been solidified by stepping on the upper layer in this manner, to a condition suitable for the competition with moderate hardness. As this leveling machine, what was comprised by the tractor which is a traction machine, and the working machine connected with this tractor is known conventionally (for example, refer patent documents 1, 2).

  In such a conventional leveling machine, for example, as a first step, the ground is loosened by connecting the reiki to the tractor and pulling the reiki on the ground in this state. Then, as a next step, a rolling roller is connected to the tractor, and the rolling is performed by pulling the rolling roller with the tractor on the ground loosened in this state. Then, as a final step, the ground in the compacted state is leveled to complete the ground leveling.

  However, when rolling the ground with a rolling roller after loosening the ground with Reiki, the degree of rolling is uneven between where the four wheels of the tractor pass and where it does not. Even if the rolling is performed evenly with the rolling roller after that, a difference occurs in the degree of rolling, and the rolling is not uniformly applied on the entire surface.

  In addition, since the conventional tractor is a clutch switching system in which the transmission is transmitted from the transmission to the belt by a clutch, the traveling operation is suddenly applied at the time of starting or the like to the rake or the rolling roller connected to the rear, and they bounce. There is a case. When the reiki or the rolling roller bounces in this way, the unraveling condition and the degree of rolling are uneven at the portion, and the entire surface cannot be loosened and rolled.

  Especially, in the leveling machine that connects the rolling roller to the tractor (this is called “self-propelled ground roller”), when the rolling roller bounces, the ground rolling pressure does not become uniform, There is unevenness in hardness on the ground leveling surface. As a result, for example, injuries such as an ankle sprain of a player are easily induced, and in ball games, it also causes irregular bouncing.

  In this way, the conventional self-propelled ground roller is not only expensive because it requires a tractor, but also the degree of rolling pressure is uneven due to the tractor's four wheel traces, and further when the tractor starts, etc. There is a problem that the rolling roller bounces due to the traveling operation and the rolling pressure does not become uniform over the entire surface.

JP 2002-161510 A JP 2009-41283 A

  The present invention was created to solve such problems of the prior art, and its purpose is to provide a self-propelled ground roller having a simple structure capable of applying uniform rolling pressure to the entire surface. There is to do.

  As a result of intensive studies to achieve the above object, the present inventor makes the front and rear wheels act as a rolling roller, and devise a drive unit that drives the front wheels, a handle operation mechanism, and a plate-shaped scraper. Thus, the inventors have found that the object of the present invention can be achieved, and have completed the present invention.

That is, the present invention has the following configurations (1) to (3).
(1) A front vehicle body having a front wheel and a rear vehicle body having a rear wheel are connected by a pin connection method to form a traveling vehicle body, and both the front and rear wheels are configured to act as a rolling roller. A drive unit for driving the front wheel in the front vehicle body includes an engine, a hydraulic pump rotated by the engine, a hydraulic transmission device operated by the hydraulic pump, and the front wheel driven by the hydraulic transmission device. A self-propelled ground roller that is composed of a traveling motor that rotates.
(2) A connecting horizontal member into which a pin connection type connection pin is inserted is provided on the front surface of the rear vehicle body, and the front vehicle body has two pieces connected to the left and right positions sandwiching the connection pin of the horizontal member. The self-propelled ground roller according to (1), further comprising: a power steering of a steering handle that operates the cylinder separately; and a pump directly connected to a hydraulic transmission device that operates the power steering.
(3) It is provided with a plate-shaped scraper that removes mud adhering to the surface of the front and rear wheels, which are rolling rollers, and each scraper is provided on the traveling vehicle body so as to abut on the rear of the front and rear wheels. The self-propelled ground roller according to (1) or (2).

  The invention of the above (1) eliminates the need for an expensive tractor and can reduce costs, and the rolling body smoothly starts, stops, and travels, so that the rolling roller does not bounce and the rolling pressure becomes uniform over the entire surface. By using both the front and rear wheels of the vehicle body as a rolling roller, there is an effect that the rolling effect is doubled by both the front and rear wheels, rather than unevenness in the degree of rolling pressure between the wheels of the traveling vehicle body.

  In the invention of the above (2), the steering wheel operation is a power steering, and the rear vehicle body is turned with respect to the front vehicle body. Is much smoother and easier to control.

  In the invention of the above (3), the mud on the surface of the rolling roller scraped off by the plate-shaped scraper is scraped down and then falls down along the slope of the lower surface of the scraper. It returns to the ground without splashing above, and mud disappears.

1 is an overall side view showing a first embodiment of the present invention. It is a top view of FIG. It is a figure explaining the hydraulic drive of a 1st embodiment. It is a figure which shows the 2nd embodiment of this invention and demonstrates handle | steering-wheel operation. It is a figure which shows the 3rd embodiment of this invention and demonstrates the effect | action of a scraper.

  The self-propelled ground roller of the present invention divides the traveling vehicle body into front and rear wheels divided into a front wheel and a rear wheel, and both the front and rear wheels act as a rolling roller, and the front vehicle body This is realized by making the front wheel a hydraulic drive using a hydraulic transmission device. Hereinafter, three embodiments will be described with reference to the accompanying drawings.

(First embodiment)
1 to 3 show a first embodiment of the present invention. FIG. 1 is a side view showing the entire self-propelled ground roller, FIG. 2 is a plan view of FIG. 1, and FIG. FIG.

  1 and 2, reference numeral 1 denotes a front vehicle body that constitutes a front portion of the traveling vehicle body, 2 denotes a rear vehicle body that constitutes a rear portion of the traveling vehicle body, and 3 denotes a connection between the front vehicle body 1 and the rear vehicle body 2 by a pin coupling method. The connecting pin 4 protrudes from the rear surface of the front vehicle body 1 and the connecting pin 3 is inserted, and 5 is a connecting horizontal member that protrudes from the front surface of the rear vehicle body 2 and into which the connecting pin 3 is inserted. By connecting the horizontal member 5 and the connecting portion 4 with the connecting pin 3, a traveling vehicle body is configured as shown in the figure.

  Reference numeral 6 denotes two left and right front wheels that are pivotally supported on both the left and right sides of the front vehicle body 1 and act as a rolling roller, and 7 is configured to pivot on the rear vehicle body 2 and act as a rolling roller. It is a rear wheel. Thus, both the front and rear wheels 6 and 7 act as a rolling roller so that the traveling vehicle body travels.

  8 is a steering handle, 9 is a driver's seat, 10 is a cover portion of a front wheel 6 provided on each of the left and right sides of the front vehicle body 1, and 11 is a cover portion of a rear wheel 7 provided on the rear vehicle body 2. The rear wheel 7 is formed on the rear vehicle body 2 so as to cover the rear wheel 7 from above.

  The self-propelled ground roller having such a configuration travels on the ground in the state shown in FIGS. 1 and 2, and along with the traveling of the front and rear wheels 6 and 7, the rolling rollers are the front and rear wheels 6 and 7. The ground pressure is applied. Since such a self-propelled ground roller does not employ traction by a conventional tractor, rolling unevenness due to the tractor's four-wheel trace does not occur. The pressure effect will be doubled.

  In addition, the rolling roller of the rear wheel 7 is divided into left and right at the center as shown in FIG. 2, and the weight can be adjusted by the amount of water supplied from the water supply port 12 (see FIG. 1). Therefore, the degree of rolling can be changed and adjusted as necessary.

  Next, driving of the front wheels 6 of the traveling vehicle body will be described with reference to FIG. When the engine 13 is started, a hydraulic pump 14 and an HST (hydraulic transmission device) 15 are operated by the engine 13. When the two left and right traveling motors 16 are driven by the HST (hydraulic transmission device) 15, both front wheels 6 are driven by the rotation of the both traveling motors 16, and the traveling vehicle body travels.

  In such a mechanism, the engine 13 operates the hydraulic pump 14 and the HST (hydraulic transmission device) 15, and the two left and right traveling motors 16 are driven by the HST (hydraulic transmission device) 15. ), Stopping and running (speed adjustment), the operation is smooth. Therefore, because of the clutch switching system in which the transmission is transmitted from the transmission to the belt like a conventional tractor, the rolling roller does not bounce at the ground due to a sudden running operation at the time of starting or the like. No pressure unevenness occurs, and the ground rolling pressure is uniform over the entire surface. In particular, the smoothness of the traveling is exceptional in this type of vehicle in which the traveling vehicle body is bound in a sensitive manner because the traveling vehicle body is divided into two parts.

(Second embodiment)
FIG. 4 shows a second embodiment of the present invention and explains the handle operation. The second embodiment will be described with reference to FIGS. 1 to 3 of the first embodiment.
In FIG. 4, reference numeral 17 denotes a pair of left and right cylinders disposed on the front vehicle body 1, and the piston rods 17 a are respectively connected to left and right positions sandwiching the connecting pin 3 of the horizontal member 5.

  When the power steering 19 is operated by the pump 18 directly connected to the HST (hydraulic transmission device) 15, the two cylinders 17 and 17 are operated separately by the power steering 19 so that the horizontal member 5 is moved left and right. Swing. As the horizontal member 5 swings to the left and right, the traveling vehicle body is bent into a dogleg shape (the rear vehicle body 2 rotates with respect to the front vehicle body 1), and thus the traveling vehicle body rotates to the left and right.

  As described above, since the operation of the steering handle 8 becomes power steering, light and smooth steering (turning) is possible as compared with a conventional tractor that is heavy and difficult to handle. In particular, when the traveling vehicle body is divided into two parts, it is extremely difficult to turn the vehicle. However, such power steering makes it easy for anyone to control.

(Third embodiment)
FIG. 5 shows the third embodiment and explains the operation of the scraper. The third embodiment will be described with reference to FIGS. 1 and 2 of the first embodiment.
In FIG. 5, 20 is a plate-shaped scraper for dropping mud adhering to the surfaces of the front and rear wheels 6 and 7, which are rolling rollers. The rear vehicle body 2 is provided so as to abut on the rear side of the wheel 7 upward. These scrapers 20 can be provided over the entire length in accordance with the width (the length in the axial direction) of the rolling roller in contact with each other, and all of them are configured to contact elastically with a spring.

  Thus, since the scraper 20 has a plate-like tip facing upwards by the spring and is in contact with the roller surface, the mud scraped off from the roller surface remains on the ground downward along the slope of the downward lower surface of the scraper 20 as it is. Fall. Therefore, the scraped mud returns to the ground without splashing upward, so that no mud disappears.

  The dust that rises above the roller surface after passing through the tip of the scraper 20 also falls immediately after passing through the scraper 20, falls on the slope of the upper surface of the scraper 20, falls to the ground along the inclined surface, and returns. However, since the cover parts 10 and 11 prevent the scattering of the parts that have risen upward, the dust does not rise on the ground, nor does it adhere to the roller surface to form a dumpling-like lump.

  In particular, the cover 11 of the rear vehicle body 2 completely covers the upper half of the rolling roller as is apparent from FIGS. 1 and 2, so that there is powdery sand that soars through the scraper 20. However, these scattering can be completely suppressed, and finally all can be returned to the ground.

  Since the self-propelled ground roller of the present invention can evenly level the ground by a rolling roller with a simple structure, it can be greatly utilized in places where ground maintenance is required.

1: Front vehicle body 2: Rear vehicle body 3: Connection pin 4: Connection part of front vehicle body 1 5: Horizontal member of rear vehicle body 6 6: Front wheel (rolling roller) of front vehicle body 1
7: Rear wheel (rolling roller) of rear body 2
8: Steering handle 9: Driver's seat 10: Cover portion of front wheel 6 11: Cover portion of rear wheel 7 12: Water supply port 13: Engine 14: Hydraulic pump 15: HST (hydraulic transmission device)
16: Traveling motor 17: Cylinder 17a: Piston rod of cylinder 17 18: Pump 19: Power steering 20: Scraper

Claims (3)

  A front vehicle body having a front wheel and a rear vehicle body having a rear wheel are connected by a pin connection method to form a traveling vehicle body, and both the front and rear wheels are configured to act as a rolling roller and the front portion A drive unit that drives the front wheel of the vehicle body includes an engine, a hydraulic pump that is rotated by the engine, a hydraulic transmission device that is operated by the hydraulic pump, and a traveling that is driven by the hydraulic transmission device to rotate the front wheel. A self-propelled ground roller characterized by comprising a motor.   Provided on the front of the rear vehicle body is a connecting horizontal member into which a pin connection type connection pin is inserted, and the front vehicle body has two cylinders respectively connected to the left and right positions sandwiching the connection pin of the horizontal member. The self-propelled ground roller according to claim 1, further comprising: a power steering of a steering handle that operates the cylinder separately; and a pump directly connected to a hydraulic transmission device that operates the power steering.   A plate-shaped scraper for removing mud adhering to the surfaces of the front and rear wheels, which are rolling rollers, is provided, and the scraper is provided on each traveling vehicle body so as to abut on the rear side of the front and rear wheels, respectively. Item 3. The self-propelled ground roller according to item 1 or 2.

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