JPH0522003Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a deep tillage device for deeply cultivating between fruit trees in an orchard or between perennial crops.

[Conventional technology]

The applicant of the present application has installed a linear spiral digging blade that rotates at a substantially predetermined pitch along a virtual cylinder on a vertical rotating shaft, and by rotating the rotating shaft in the normal direction, the spiral digging blade is pierced into the soil. In a deep cultivating device that extracts a spiral digging blade that has entered the soil by digging or reversing the rotating shaft, the spiral digging blade is removed together with the surrounding soil while the spiral digging blade is dug into the soil. We have proposed a device equipped with a lifting mechanism that lifts up the helical digging blade to dig a hole, or lowers the lifted spiral digging blade.

[Problem that the idea aims to solve]

By the way, the spiral digging blade has a spiral spring-like structure, so if the soil in the field to be deeply cultivated is hard, the reaction torque when the digging blade enters the soil becomes large, causing a large deflection of the digging blade. There was a problem that the work could not be carried out smoothly.

[Means to solve the problem]

The present invention was developed in view of the above circumstances, and includes a support shaft 11 horizontally protruding from the lower end of the support frame 4, and a support shaft portion 12 at the tip of the support shaft 11.
A is fixed perpendicularly to the ground, and a support roll 14 that rolls into contact with the inner peripheral edge of the spiral digging blade 9 is rotatably provided on the support shaft 12a.

[Effect]

By configuring in this way, the present invention
The spiral digging blade enters the soil smoothly at a predetermined pitch even if the soil is hard, preventing the entire deep cultivation device from shaking and allowing stable work.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a tractor, and a deep cultivation device 3 is attached to the rear of the tractor 1 via a three-point link hitch mechanism 2 so as to be movable up and down. The deep cultivation device 3 is removably attached to the three-point link hitch mechanism 2, and has a guide rod 5 fixed in parallel with the frame 4 at a position close to the rear of the support frame 4 extending in the vertical direction. A slider 6 that is vertically movable is fitted in the. A support plate 7 extending in the rear horizontal direction is provided at the lower end of the slider 6.
is fixed to the support plate 7, and a hydraulic motor 8 is mounted on the support plate 7.
and a spiral digging blade 9 which can be rotated in both forward and reverse directions by the hydraulic motor 8. The spiral digging blade 9 is a linear blade that rotates at approximately a predetermined pitch along a temporary cylinder on a rotating shaft that projects vertically downward from the hydraulic motor 8, and excavates into the soil by rotating in the forward direction, and when rotating in the reverse direction. It is extracted from the soil by doing this. On the other hand, a support housing 10 that also serves as a support member for the slide rod 5 is provided at the lower end of the support frame 4, and a support shaft 11 is horizontally protruded rearward from the support housing 10. As shown in FIG. 2, an anchor pin 12 having a support shaft portion 12a is vertically fixed to the tip of the support shaft 11. As shown in FIG. This anchor pin 12 is connected to the spiral digging blade 9.
It is located below the rotation center of the support shaft portion 12a.
, a pair of support rolls 14 are mounted on the upper and lower sides of the support shaft 11 via a pair of bearings 13, 13.
14 is supported rotatably in the horizontal direction. Further, as shown in FIGS. 3 and 4, a guide roll 16 is rotated vertically via a bearing 15 on the support shaft 11 with a slight gap from the outer periphery of the core support rolls 14, 14. Supported for free movement. The outer circumferential surface of the guide roll 16 is formed in an arcuate shape with a lower central portion in the width direction. The support rolls 14 and 14 are arranged to be in rolling contact with the inner circumferential surface of the spiral digging blade 9, and the guide roll 16 is in rolling contact with the upper surface or the lower surface of the spiral digging blade 9. Note that the number of supporting rolls 14 is not limited to two, and more than two, and the number of guide rolls 16 is not limited to one, but may be provided. When performing deep plowing work in an orchard, for example, the deep plowing device configured in this way is used to move the deep plowing device 3 using the three-point linkage mechanism 2 with the spiral digging blade 9 raised to the uppermost position, as shown in FIG. It is lowered until it touches the ground, the anchor pin 12 is brought into contact with the deep plowing center position, and the excavation blade 9 is rotated forward by the hydraulic motor 8. The spiral digging blade 9 supports the inner peripheral surface of the roll 1.
4 and 14, and its upper surface is brought into contact with the guide roll 16, while digging into the soil at a predetermined pitch. Then, as shown in FIG. 5, when the spiral digging blade 9 has dug to a predetermined depth, the rotation of the hydraulic motor 8 is stopped. Thereafter, when the excavation blade 9 is reversed by the hydraulic motor 8, the helical excavation blade 9 is pulled out from the soil with its inner circumferential surface being in contact with the supporting rolls 14, 14 and its lower surface being in contact with the guide roll 16. Blade 9
The areas that have passed through will be deeply cultivated. In addition, as shown in FIG. 5, when the spiral digging blade 9 is inserted into the soil to a predetermined depth, as shown in FIG.
When the deep plowing device 3 is slightly lifted by the three-point link hitch mechanism 2, cracks are created in the soil around the digging blade 9, thereby increasing the deep plowing effect. Furthermore, when the deep tillage device 3 is further raised from the state shown in FIG. 6, the soil moves and rises in a cylindrical shape around the digging blade 9, allowing digging work to be performed.
Moreover, the excavated soil can be backfilled into the hole by reversing the digging blade 9. When the spiral digging blade 9 rotates forward or backward, the anchor pin 12 sticks into the ground.
Prevents the entire deep cultivation device 3 from swinging back and forth and left and right,
In addition, the support rolls 14, 14 function to support the digging blade 9 from the inside so that it smoothly enters the soil at a predetermined pitch, and the guide roll 16
The vertical propulsive force of the digging blade 9 is made to act in a constant state at all times, and the spiral digging blade 9 works to enter the soil at a constant pitch. These anchor pins 12, support rolls 14,
14. The guide roll 16 works particularly effectively when the soil is hard. Moreover, when the digging blade 9 is reversed and pulled out from the soil, the soil attached to the digging blade 9 can be removed by the support roll 14 and the guide roll 16. In addition, although the above-mentioned embodiment shows a peach provided with one set of deep cultivation devices, it is also possible to provide a plurality of sets in the left and right direction.

[Effect of the idea]

As explained above, according to the deep cultivation device of the present invention, the support part 4 that supports the spiral digging blade 9 so as to be movable up and down.
Since the support roll 14 is provided which rotates horizontally in contact with the spiral excavation blade 9 at a position close to the ground surface, the helical excavation blade 9 is prevented from swinging back and forth and from side to side when digging into the soil. It can be penetrated into the soil at a predetermined pitch. Further, when the spiral digging blade 9 is pulled out from the soil, the soil adhering to the spiral digging blade 9 can be forcibly removed by the support roll 14.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a side view of the entire deep cultivation device, Fig. 2 is a vertical sectional view of the main parts, and Fig. 3 is a longitudinal sectional view of the main part.
The figure is a front view of the main part, FIG. 4 is a sectional view taken along the line -- in FIG. 1, and FIGS. 5 and 6 are action explanatory views. DESCRIPTION OF SYMBOLS 1... Tractor, 2... 3-point link hitch mechanism, 3... Deep cultivation device, 4... Support frame, 5...
...Guide rod, 6...Slider, 7...Support plate, 8
... Hydraulic motor, 9 ... Spiral digging blade, 10 ... Support housing, 11 ... Support shaft, 12 ... Anchor pin,
12a... Support shaft portion, 13, 15... Bearing, 14... Core support roll, 16... Guide roll.

Claims (1)

[Claims for Utility Model Registration] A linear spiral digging blade that rotates at approximately a predetermined pitch along an imaginary cylinder is attached to a rotating shaft provided in the vertical direction, and spiral digging is performed by rotating the rotating shaft in the normal direction. In a deep cultivating device that allows the blade to dig into the soil and removes the spiral digging blade that has entered the soil by reversing the rotating shaft, a support shaft 11 is horizontally protruded from the lower end of the support frame 4. , a support shaft portion 12a is provided at the tip of the support shaft 11.
The deep cultivation device is characterized in that a core support roll 14 is fixed perpendicularly to the ground and rotatably provided on a support shaft portion 12a and rolls into contact with the inner peripheral edge of the spiral digging blade 9.