JPS5917946Y2 - Underdrain creation device - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to an apparatus for creating an underdrain for drainage and water flow by driving an excavation beam into the soil and towing it, for example, with a tractor.

When excavation beams are used in paddy fields to create culverts for drainage and water flow for second crops after rice harvesting, a problem arises in that straw accumulates in front of the beams and lifts the beams.

To solve this problem, a conventional method has been to attach a cutting disk to the front of the beam and tow the beam while cutting the straw.

However, in this case, the problem of straw sinking into the soil and getting caught in the excavation beam without being cut was not solved.

The object of the present invention is to provide an underdrain making device having a cutting device using a top straw ball that solves the above problems.

The purpose of this is to install gauge wheels on both sides of the cutting disc, which is a rotary blade that cuts straw, to vertically position the working machine frame to which it is attached, and to connect the cutting disc to the intersection with the soil surface in front of the cutting disc and the gauge wheel. This was achieved by using an underdrain making device that has a cutting device whose contact point with the upper surface of the lower end of the underdrain is aligned in the direction of travel.

The present invention will be explained according to embodiments shown in the drawings.

In FIG. 1, a prime mover 1 is installed in a tractor main body A, and a gear box 4 is connected via a transmission 2 and a transmission shaft 3.
The rotation is transmitted to.

Furthermore, power is transmitted from the gearbox 4 via a chain 5 to a cutting disc 6, which is a rotary cutting blade for cutting straw, having an axis of rotation in a horizontal plane, perpendicular to the direction of travel of the tractor.

The disc 6 is vertically adjustable and supported by a cutting disc support arm 9 on a working machine frame 15 attached to the rear of the tractor.

Further, behind the cutting disk 6, an excavation beam 12 extends downward from the frame 15 into the soil B.

At the lower end of the beam 12, a sharp excavation 13 is provided in the direction of travel.
is fixed, and a bullet body 14 having a cross-sectional shape corresponding to the cross-sectional shape of the culvert is connected behind it.

The excavation beam 12 is vibrated in the longitudinal direction T by the power from the prime mover 1 to promote excavation.

Now, two gauge wheels 8 supported by gauge wheel support arms 7 fixed to the working machine frame 15 are rotatably provided on both sides of the cutting disc 6 slightly forward.

The original purpose of the gauge wheel 8 is to
In order to position and support the work equipment frame 15 in the vertical direction, it is usually installed at a position farthest from the joint position of the work equipment frame 15 with the tractor (i.e., at the rear end), and stabilizes the running of the work equipment frame 15. It will be planned.

In the present invention, the gauge wheel 8 is provided slightly in front and on both sides of the cutting disc 6 as described above, and more precisely, the gauge wheel 8 is provided at the contact point G with the soil surface.
The intersection point C between the cutting disk 6 and the front soil surface is made to almost coincide in the front-rear direction.

Thereby, when the cutting disk 6 cuts the straw at the intersection C with the front soil surface, both sides of the straw are pressed by the gauge wheel 8.

The details of the relationship between the disk 6 and the wheel 8 are shown in FIG.

That is, the state in which the cutting disk 6 is provided between the gauge wheel 8 rotatably attached to the gauge wheel support arm 7 fixed to the working machine frame 15 is shown.

The narrower the lateral distance between both wheels 8, the more effective it is for holding down the straw.

The operation of the underdrain making device having the straw cutting device having the above configuration is as follows.

That is, as the tractor advances, the cutting disc 6 rotates and the excavation beam 12 vibrates in the front and rear directions.

The straw of the top ball is cut by the cutting disk 6 with both ends pressed against the top ball by the gauge wheel 8.

The cut straw is guided rearward, but since the cutting position and the position of the excavation beam 12 match on the traveling path, the straw is guided to the rear of the tractor without being caught by the excavation beam 12.

The present invention has the following effects in the above configuration and operation.

In other words, when the cutting disk cuts the straw in the upper layer, the gauge wheel, which carries the weight of the machine frame, presses the straw against the upper layer, so the straw is reliably cut in wet fields and a culvert is created. .

[Brief explanation of the drawing]

FIG. 1 is an overall side view of the underdrain making device equipped with the straw cutting device of the present invention. FIG. 2 is a front view of the main part in cross section taken along line 2-2 in FIG.

Claims (1)

[Scope of utility model registration request] A cutting disk for cutting straw that rotates under the power of a prime mover is vertically adjustable at the lower center of the working machine frame to which the excavation beam is attached, and is mounted near the front side of the cutting disk. The two gauge wheels are rotatably supported by a support arm projecting downward from the work machine frame, and the front grounding point of the cutting disc is located near a line connecting the grounding points of both gauge wheels. A culvert creation device characterized by: