JPS6239610Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a scraper device for a furrowing disc in a fertilizing or seeding machine.

(Prior art) A groove cutting disk equipped on a fertilizer application or seeding machine is disclosed in Japanese Utility Model Publication No. 51-49288,
Its rotational axis is inclined with respect to the direction perpendicular to the direction of work progress, and its front projection shape is set to an ellipse. A plate-shaped scraper is provided close to the cutting disk and extending to approximately the bottom of the groove cutting disk.

(Problems to be Solved by the Invention) The conventional scraper has the function of removing soil adhering to the groove cutting disc, but it is difficult to remove adhering soil from the contour of the disc. When the lower end is brought closer to the disc profile, the lower trailing edge protrudes outward from the disc profile and actively disrupts the groove. Moreover, it does not have the function of resisting landslides in the ditch. The groove-cutting disk piles up soil to one side while forming a groove on the leading side, but no soil is piled up on the trailing side, and therefore, the soil is piled up to one side from the rotational axis of the groove-cutting disk. Half of the groove formed on the side remains cut and is not pressed down by a disk, making it susceptible to landslides.

That is, in the prior art, since the disk is in a flat shape that does not follow the contour of the disk, it is difficult to have the scraper prevent landslides or press down the collapsed soil to shape the groove into an appropriate shape. It was difficult.

(Means for Solving the Problems) The present invention is characterized in that the lower end of the front edge of the scraper extends to the lower end of the grooving disk, and the lower end of the rear edge is curved close to and along the front-projected elliptical contour of the grooving disk. By changing the shape, the problems of the prior art described above can be solved.

That is, the specific configuration of the problem-solving means in the present invention is that the groove cutting disk installed in the fertilizing or seeding machine has a rotating axis inclined with respect to a direction perpendicular to the work progress direction, and the front projection shape is set to be an ellipse. A plate-shaped scraper is disposed on the trailing surface side of the grooving disk, the front edge of which is closer to the grooving disk than the rear edge, and which extends to approximately the lower end of the grooving disk. The lower part of the scraper's trailing edge is curved close to and along the front-projected elliptical profile of the groove-cutting disc in order to counter landslides from the non-raised side of the preformed groove. be.

(Function) The groove cutting disk, which forms an elliptical groove while rotating, has soil adhering to its traveling surface removed by a scraper. The lower leading edge of the scraper is close to the contour of the grooving disc, providing an effective scraping function. In addition, the lower trailing edge of the scraper is curved in close proximity to and follows the front-projected elliptical contour of the groove-cutting disk, thereby preventing the soil from collapsing on the non-heavy side of the pre-formed groove. It catches the soil to prevent it from falling to the trench bottom, and also presses soil that has collapsed onto the trench bottom in front of the scraper to the trench wall side and lower side to prevent the trench from losing its shape.

(Example) This invention will be explained below with reference to the illustrated example.

In FIG. 1, reference numeral 3 indicates the body of the tractor, and at the rear of the tractor is a lift arm 5 which is propped up by a hydraulic system 4.
The tiller 1 is equipped with a lift rod 6 and a lower link 7, and is connected to the tiller 1 through the mounting base 8 and top link 9.
It is connected to the top mast 11 on the 0 side. In this case, the lift rod 6 is normally pivotally connected to point A of the lower link 7, but when a seeding machine 12 with a large weight moment is attached to the rear as shown in the figure, a considerable lifting force is required. By providing a point B on the auxiliary bracket 13 fixed to the rear of the point A and pivoting the lift rod 6 to it, a sufficiently large lifting moment can be obtained with the same hydraulic pressure. The tilling machine 10 is of a normal type, and has a planar H-shaped support rod 14 with an adjustment mechanism 15 extending from its rear end, and a cylindrical support rod 16 facing left and right between its rear ends. are integrally suspended horizontally as shown by the imaginary line in FIG. The toolbar 18 is fixed.

Multiple seeding machines 12, which will be described below, are installed via this tool bar 18.

The seeding machine 12 is of a type in which a fertilizer applicator is mounted on the front, and can be freely towed by a parallel link 19 shown in the figure.
Numeral 20 is a fertilizer hopper at the front, and 21 is a seed hopper, which are arranged in a high position on a vertical frame 22 fixed to the back of the tool bar 18 via pipe stays 23 erected.

Reference numeral 24 denotes a seeding body towed via a parallel link 19, which is box-shaped, and has fertilizer guided to the front side and fed out sequentially, and seeds guided to the rear side, which can be fed out downward. . Reference numeral 25 denotes these rolling wheels, and the front and rear wheels are interlocked by an internal chain transmission means. Reference numeral 26 denotes a suppression wheel that is freely rotatable at the rear via a long support pipe 27.

In a device having such a structure, 1 indicates a groove cutting disk for fertilization, and as shown in the third figure, the L-shaped disk stay 28 is fixedly suspended from the bottom of both sides of the sowing body 24. There are a pair on the left and right. As is well known, each disk 1
The scraper 2 is shaped like a slanted plate in the direction of movement and forms a groove 29 of a constant width as shown in the third figure. be.

That is, the grooving disk 1 has its rotational axis inclined with respect to the direction perpendicular to the work progress direction, and its front projection shape is set to an ellipse, and the trailing surface side (back side) of the grooving disk 1 A strip-shaped scraper 2 whose front edge is closer to the grooving disk 1 than its rear edge is disposed. This scraper 2 is not a boat-shaped type that actively cuts grooves like the scraper 2 on the sowing side in FIG. The upper base end is fixed to the bent rod part 28a and faces vertically into the preformed groove 29, and in particular, it is arranged so that its plate surface faces the non-raised side L of the groove 29 at a slight angle. ing. The situation is also shown in FIG. The reason why the rear end of the scraper 2 is on the non-heavy side L than the front end is to have the function of returning the collapsed soil, and for this reason, the lower end 2a of the scraper 2 has a groove 29 as shown in the fourth figure.
It has a curved shape that fits inside. Also, the lower end portion 2a may have a shape that completely fits one side of the groove 29, that is, it may be made wider as shown by the imaginary line X in FIG.
In that case, only the lower end portion 2a may be made wider to form a Y shape, and in this case the landslide prevention effect is more complete.

Further, the fact that the lower part 2a of the rear edge of the scraper 2 is close to the front-projected elliptical contour of the disk and curved along the contour is as follows.
This not only improves the strength of the scraper 2, but also protects against landslides in the trench, thereby preventing landslides and pushing the collapsed soil toward the trench walls and downward.

Therefore, according to the groove cutting disk 1 having the scraper 2 configured as described above, since the scraper 2 does not actively form the groove, there is no dirt accumulation on one side of the scraper 2, and the overall resistance is extremely reduced. In addition to being able to form grooves, the scraper 2 catches and eliminates landslides on the non-heavy side L that tend to occur when forming grooves on highly dry soil such as sandy soil. Fertilization work at the immediate rear position is extremely accurate and stable. or,
As in the above embodiment, the scraper 2 and the fertilization position can be placed in close proximity to each other, and as a result, fertilization can be ensured.

As shown in the second figure, a conventional scraper 2 is installed on the sowing side, but of course this is also constructed using the scraper 2 of this invention.

(Effects of the invention) The present invention is as described above, and the lower part of the scraper's rear edge is close to and curved along the front-projected elliptical contour of the groove cutting disk, and the scraper is curved along the front projection elliptical contour of the groove cutting disk. Since it is possible to resist landslides from the uphill side, the groove formed by the groove cutting disk on the forward side of the rotational axis in the work progress direction is on the non-heavy side and is likely to cause landslides, but the scraper can protect against landslides. It is possible to prevent soil from collapsing and press the collapsed soil toward the trench walls and the bottom, making it possible to form trenches with appropriate shapes.Moreover, since the scraper does not cut the soil, soil resistance is small, and the curved shape increases strength. can also be improved.

In FIG. 1, a removable stand 31 is attached to a fixture 30 attached to the tool bar 18, and when the stand 31 is fixed upside down as shown in the figure, the lower end of the stand 31 acts as a scraper for the two rear wheels 32. In addition, it is designed so that when it is normalized, it can form a regular stand.

[Brief explanation of the drawing]

Figure 1 is a side view of a tractor with a tilling machine to which a fertilizing or seeding machine can be attached, Figures 2 to 4 show embodiments of the present invention, and Figure 2 is a side view of the seeding machine;
FIG. 3 is a plan view of the groove cutting device, and FIG. 4 is a view taken along the Z arrow in FIG. 1...grooving disk, 2...scraper, 12
... Seeding machine, 29 ... Forming groove, L ... Non-heavy side.

Claims (1)

[Claim for Utility Model Registration] The groove cutting disk installed in the fertilizing or seeding machine has its axis of rotation inclined with respect to the direction perpendicular to the direction of work progress, and its front projection shape is set to an ellipse. A plate-shaped scraper is disposed on the trailing surface side of the cutting disk, the front edge of which is closer to the groove cutting disk than the rear edge, and which extends to approximately the lower end of the groove cutting disk, wherein the scraper is located at the rear edge of the groove cutting disk. Fertilization or sowing, characterized in that the lower part is curved close to and along the front-projected elliptical contour of the groove-cutting disk in order to counter landslides from the non-raised side of the preformed groove. Scraper device for groove cutting disc in machine.