JPS6325927Y2 - - Google Patents

Description

[Detailed explanation of the invention] Normally, fields are defined by ridges, and the ridges are sometimes maintained in shape by mounding soil and painting the ridges. Not only is it extremely difficult mechanically to excavate the entire surface of a ridge or fill it with ridges, but in recent years there have been many fields that are so close together that the edges of the fields are blocked by concrete walls on the shoulders of roads, etc. It is nearly impossible to mechanically excavate the entire area next to these concrete walls. According to Tabata, the ridges are often curved, making it extremely difficult to work along them with a tractor. Even if the ridge is straight, if the front of the tractor reaches the end of the ridge, the space between the front of the tractor and the working machine will naturally remain unworked. On the other hand, cutting the ridges and digging horizontal trenches around the fields is for draining rainwater and drying the fields, or for burying the ridge waterproofing sheet in the soil or making it easier to pull it out from the soil. It is important to note that for the reasons mentioned above, ridge cutting and trench digging work is generally done by skilled elderly people using hoes, etc., which is not only inefficient but also difficult to make horizontal trenches. There was a drawback that it was difficult to create the bottom and ridges.

The purpose of this invention is to eliminate the above-mentioned drawbacks by providing a work machine that can perform ridge cutting and trench digging in a single step, extremely easily and efficiently, without mechanical strain or straining during travel. That is.

The present invention will be explained below based on the drawings.

Machine platform 3 of small mobile agricultural machine 2 with engine 1 mounted on the tower
A drive shaft 5 of the lower transmission case 4 is provided, and on one side of the drive shaft 5, a disc blade 7 with a diameter of approximately 340 mm is provided at the outer end of a cylindrical shaft body 6 of a predetermined length. From the inner surface to approximately half the circumference around the cylindrical shaft body 6, the helical end is directed inward to form a helical twisted surface 8'.
A spiral blade 8 that coincides with the outer peripheral edge of the disk formed with
Following this, a rotary shaft 10 in which the spiral blade 8 and a spiral blade 9 having the same diameter or a small diameter and a similar spiral curved surface 9' are arranged in different phases is attached to the drive shaft 5 with a connecting pin 11 and driven. On the other side of the shaft 5, an axle 13 with a steel lug wheel 12 is attached, and a horizontal base rod 15 is installed at the rear of the small mobile agricultural machine 2 via a link 14 to one side. A holder 16 is supported and can be slid left and right to the side ends of the base rod and fixed thereto.
The holder is provided with a vertical blade plate 18 on one side rearward from the ridge line 17' of the gouge tip 17 in line with the movement locus of the disc blade 7, and on the other side a mound plate 18 that spreads laterally toward the rear. The soil blade plate 19 is properly fixed through the groove-maker support rod 22 of the groove-maker 21, which is formed by providing a bed section 20 of a predetermined width between the bottoms of these blades.
A threaded ring 24 at the lower part of the groove creator support rod 22 on which the center portion of the groove creator 21 is pivoted 23, and a groove creator 21
By screwing together a rotary screw handle shaft 25 whose tip is pivoted on the inside of the lower part of the rod, the longitudinal horizontal adjustment means 27 of the bed section rotates the groove cutter 21 back and forth around the pivot 23 as a fulcrum. , the top surface of the groove maker 21 and the base rod 1
The ridge is provided with a means 28 for horizontally adjusting the horizontal level of the bed for rotating the groove maker 21 left and right around the threaded ring 24 using a telescopically adjustable stay bolt 26 connected to the central part of the ridge. This is the structure of a trench digging machine.

The present invention has the above-mentioned structure, and its operation is explained by operating the longitudinal horizontal adjustment means 27 and the horizontal horizontal adjustment means 28 of the groove cutting machine bed section to adjust the horizontal state, and to adjust the horizontal state of the small mobile agricultural machine 2. The disc blade 7 at the end of the rotary shaft 10 provided in the ridge is positioned in the middle of the ridge a, and the small mobile agricultural machine 2 is moved along the edge of the ridge.When the drive shaft 5 is rotated by the engine power, the lug wheels 12 and rotary shaft 10,
The disc blade 7 is rotated and travels, and at this time, the disc blade 7 cuts the furrow a almost vertically and advances, and the helical blade 8 of the rotary shaft 10 moves along the disc blade 7.
At the same time, it enters the soil from the same position as the cutting line, and at the same time its spirally curved surface 8' plows and crushes the soil in the field gradually inward from the ridge edge, and furthermore, the spiral blade 9 plows and crushes the soil in a predetermined width inside the ridge edge. The soil is raised and crushed to the working state shown in Fig. 4A, and then the disk blade 7
Groove machine 2 follows the cutting movement locus b and moves behind it.
The fertilizing tip 17 and the vertical blade plate 18 on one side are advanced and stroke the vertical cut wall surface c of the ridge a to shape the ridge cutting surface, and the fertilizing tip 17 and the mulch blade plate 19 on one side are moved.
In this way, the plowed and crushed soil d is shifted to the inside of the field, and a trench e with a horizontal bottom as shown in FIG. 4B is created using the plow bed section 20.

In this type of work, the spiral blades 8 and 9 and the groove cutter 21
However, when the small mobile agricultural machine 2 is moved by such resistance, it tends to be shaken and the machine body is forced to one side. Since it enters vertically and cuts, it maintains its straightness, and the vertical blade plate 18 on one side of the following trench cutter 21 always moves in contact with the cutting wall c, as if caressing the soil, and the groove continues in a spiral manner. Since the spiral blade 8 is provided along the outer peripheral edge of the disk blade with the end facing inward of the ridge, these tillage crushing soil resistance and groove cutting device 2 are provided.
The rear part of the trencher 21 is pushed toward the ridge a by the soil resistance caused by the soil shingling blade plate 19 of No. 1, and moves while being guided by the vertical cutting wall c, so that it moves to the left and right of the centerline of the machine. Even if the resistance of the small mobile agricultural machine 2 is unbalanced, the small mobile agricultural machine 2 will not be forced to one side, and stable running will be maintained by the lug of the lug-equipped wheel 12 on the other side biting into the ground. Moreover, without the need for a ground stabilizing rod to increase resistance, smooth running can be achieved using only the wheels with lugs 12, and ridge cutting and trench digging work with horizontal trench bottom surfaces can be carried out without difficulty.

As explained above, according to this invention, one lug wheel and the other rotary shaft, which are mounted on the drive shaft under the machine base of a small mobile agricultural machine, have a helical blade in which the helical ends of the rotary shaft are directed inward, and a helical blade attached to the outside. The disc blade at the end serves as a running wheel, and the ridge is cut almost vertically by the disc blade, and from the cut surface, the soil is plowed and crushed inward by a spiral blade that continues to the disc. The vertical cut wall surface of the ridge is used as a guide and the vertical blade plate of the groove cutter is always in contact with the machine as it advances, so that the machine maintains straight forward movement along the ridge cut surface, and has excellent running stability without twisting the machine body. Vertical ridge cutting, shaping of the cut surface, and digging of a trench with a horizontal groove bottom at the edge of the ridge can be performed mechanically and efficiently in one step. In addition, even in places where the edge of the field is in contact with the concrete wall of a road shoulder or side ditch, the soil shingle of the trencher is guided along the vertical cutting wall in accordance with the movement locus of the disc blade, spiral blade, and disc blade. The process makes it extremely simple and easy to create a trench with a horizontal trench bottom around the field, and it also eliminates the difficulty of working along curved ridges and the drawbacks of leaving corners of the field unworked using tractor machines. However, in the present invention, a disk blade and a spiral blade are provided on the driving axis of travel, so the distance from directly below the drive shaft to the grounding point at the rear end of the groove cutter is short. It can turn around easily, adapt well to curved ridge processing, and can mechanically perform ridge cutting and trenching work, which was previously difficult, to the corners of the field smoothly and easily, and the bottom of the furrow is horizontal. This has the advantage of making it easier to bury a ridge waterproof sheet if necessary.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an embodiment of the present invention, Fig. 2 is a back view showing the ridge working state in Fig. 1, Fig. 3 is a plan view showing the main parts, and Fig. 4 is a side view showing an embodiment of the present invention. Figures A and B are cross-sectional views showing the ridge forming process. 1...Engine, 2...Small mobile agricultural machine, 3...
Machine base, 5... Drive shaft, 7... Disc blade, 8, 9
...Spiral blade, 8', 9'...Twisted surface, 10...Rotary shaft, 12...Wheel with lug, 13...Axle,
15... base rod, 17... tip, 17'... ridge edge,
18... Vertical blade plate, 19... Soil shingling soil blade plate,
20... Goal bed section, 21... Groove machine, 22... Groove machine support rod, 27... Back and forth horizontal adjustment means for the Goba bed part,
28... Left and right horizontal adjustment means for the goba floor.

Claims (1)

[Scope of utility model registration request] One side of the drive shaft of a small mobile agricultural machine mounted on an engine is provided with a disk blade at the outer end, and the outer peripheral line of the disk is twisted so that the end of the spiral is directed inward from the inner surface of the disk blade. A rotary shaft is installed in which a helical blade corresponding to the above and a similar helical blade of the same diameter or smaller diameter are arranged in different phases, a wheel with a lug is installed on the other side of the drive shaft via an axle, and a wheel with lugs is installed on the rear side of the mobile agricultural machine. On the supported horizontal base rod, a vertical blade plate is placed on one side rearward from the tip of the blade in line with the movement trajectory of the disc blade, and a soil blade plate that gradually spreads out on the other side, and between these bottom parts. A furrow cutting method in which a groove cutter with a bed of a predetermined width is attached to the groove cutter via a support rod for the groove cutter, and a means for adjusting the horizontal levelness in the longitudinal direction and the horizontal direction of the bed of the groove cutter is provided. Machine.