JPH0799801A - Screw tilling device - Google Patents

Abstract

PURPOSE:To provide a screw tilling device capable of tilling lower layer soil roughly and upper layer soil finely and of efficiently mixing the lower layer soil with the upper layer soil. CONSTITUTION:A spiral blade 4 is fixed to a rotation shaft 2 rotated on a vertical axis, and the spiral blade is structured so that its spiral pitches p1, p2, p3 decreases from the lower part toward the upper part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw cultivator used by being mounted on a cultivator or the like.

[0002]

2. Description of the Related Art Since there is already a screw cultivator capable of rotating around a vertical axis to cultivate, a screw blade used for this is, for example, as shown in FIG. A plurality of band blades 1 formed in an oblique shape along the peripheral surface of the rotation locus are arranged at appropriate intervals in the rotation direction.

This cultivator can cultivate in any direction, and the plowing depth can be arbitrarily increased by changing the vertical length of the band blade 1.

[0004]

The conventional tiller equipped with the above-mentioned screw blade has the above-mentioned advantages, but it is almost expected that the upper and lower layers of the tiller are agitated due to the shape of the band blade. Moreover, it is not possible to cultivate the surface soil more finely than the lower soil. An object of the present invention is to provide a novel screw cultivating device capable of solving such a problem.

[0005]

In order to achieve the above object, in the present invention, a spiral blade is fixed to a rotary shaft which is rotated about a vertical axis, and the spiral blade moves upward from below. The spiral pitch is reduced.

In the present invention, the rotary shaft is rotated by the power and is advanced in the direction intersecting with the rotary shaft, whereby the spiral blade, which is rotated together with the rotary shaft, tills the soil. During this tilling, the upper part of the spiral blade cultivates finely because the spiral pitch is small, and the lower part cultivates coarsely at the same rotation speed because the spiral pitch is large, and the spiral blade cultivates the soil tilling. Move from the bottom to the top to invert and mix the upper and lower tillage soil.

Further, the above invention may be modified as follows, that is, by fixing a spiral blade to each of a plurality of partial rotary shafts fixed in a straight line along the vertical axis, The upper one has the spiral pitch set smaller. According to this, since the spiral blade is divided, one spiral blade is small and lightweight, and is easy to handle.

Further, the above invention can be modified as follows, that is, the spiral blade is fixed to a plurality of partial rotary shafts arranged in a line along the vertical axis, and each partial rotary shaft is different. It is configured to rotate at high speed. According to this, regardless of the size of the spiral pitch of the spiral blade for each partial rotation axis, the same action as when the size of each spiral pitch is increased or decreased by adjusting the size of the rotation speed is obtained. In using this device, the rotation speed of each partial rotary shaft is adjusted so that the upper spiral blade cultivates finer.

In each of the above-mentioned inventions, in order to improve the cutting ability, a cutting plate inclined so as to bite at an appropriate position on the upper surface of the spiral blade is fixed in an upright manner, or the outer peripheral edge of the spiral blade is fixed. The cutting teeth are formed so as to be uneven in the radial direction. As a result, the cutting plate acts so as to bite into the soil in front of the advancing direction of the spiral blade at an appropriate plowing angle, and the cutting teeth cut the soil as efficiently as saw teeth.

Further, in the second aspect of the present invention, the combustion gas supply pipe is fixed integrally with the spiral blade, and a flame due to gas combustion is generated from a position of each appropriate length of the supply pipe to the lower surface side of the spiral blade. By providing hole means for ejecting,
It is possible to burn out pests in the soil.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 6. In principle, the same reference numerals are used for substantially the same parts in these drawings.

FIG. 1 relates to a first embodiment of a screw cultivator according to the present invention. (A) is an overall side view and (b) is x-
It is sectional drawing of x part.

Reference numeral 1 denotes a rotary shaft mounting device for detachably mounting the rotary shaft 2, and reference numeral 3 denotes an input shaft operatively connected to the rotary shaft 2 via a bevel gear or the like.

Reference numeral 4 is a support rod 5 in the radial direction on the rotary shaft 2.
The spiral blade is fixed through the spiral blade, and the belt-shaped blade is spirally wound and the spiral pitches p1, p2, p3, ... Are made smaller from the lower side toward the upper side.

At this time, the plowing blade element k in which the spiral blade 4 is fixed to the rotary shaft 2 via the supporting rods 5 ... Has the entire vertical length and the spiral pitches p1, p2, p3 ,. Try to prepare different things.

When the apparatus of this embodiment is used, one having a plowing element k having a size suitable for a desired plowing depth is selected, and a plurality of platters are arranged in a horizontal straight line at a plowing section such as a plowing machine. The rotating shafts 2 are mounted so that they are substantially vertical, while the rotation of the prime mover is transmitted to the respective input shafts 3. Then, the cultivator is advanced with the spiral blade 4 portion of each cultivating blade element k being buried in the soil.

As a result, the rotary shaft 2 is rotated around the vertical axis to integrally rotate the spiral blade 4 in the direction of the arrow f1, and the spiral blade 4 cuts the soil from below to plow and cultivate it. The soil is always conveyed from the bottom to the top to stir the lower soil and the upper soil.

At this time, if the number of the apparatus of this embodiment is increased, the tilling width can be increased, and each tilling element k always exerts the same tilling action even if it is moved in any direction.

FIG. 2 relates to a second embodiment of the screw cultivating device of the present invention. (A) is an overall side view and (b) is x1.
It is a sectional view of the -x1 part.

In this embodiment, the rotary shaft 2 is detachably mounted on the rotary shaft mounting device 1, and a step portion 2a is provided to form a small diameter portion 2b having a polygonal cross section.

A plurality of cylindrical partial rotary shafts 2c ... Are externally fitted to the small diameter portion 2b and fixed in a straight line.

At this time, a spiral blade 4 similar to the one described above is fixed to each of the partial rotary shafts 2c, and the spiral blades 4 are arranged so that the spiral pitches p1, p2, p3, ... , The spiral blades 4 of all the partial rotary shafts 2c are associated so that a single spiral blade 4 is formed as a whole.
In the present embodiment, the spiral blade 4 of one partial rotary shaft 2c is formed to have a single spiral pitch.

Further, the rotary shaft 2 having various lengths is prepared, and the tilling element k1 in which the spiral blade 4 is fixed to one partial rotary shaft 2c through the support rod 5 is the entire vertical length and the spiral pitch. Various types of p1, p2, p3, ... Are prepared.

The apparatus of this embodiment cultivates in accordance with the apparatus of the previous embodiment, and at this time, the cultivating element k1 having an appropriate size.
Is selected to handle this for each partial rotation axis 2c.

FIG. 3 is an overall side view of the third embodiment showing the screw tiller of the present invention. In this embodiment, the rotary shaft 2
Is composed of a plurality of partial rotary shafts 2c ..., These partial rotary shafts 2c ... Are formed concentrically and in a multi-tubular shape so as to be independently rotatable, and each partial rotary shaft 2c has a variable speed rotary transmission device 6. It is supposed to be rotated through.

At this time, the same spiral blade 4 as described above is fixed at a fixed lower portion of each partial rotary shaft 2c, and the spiral pitches p1, p2, p3, ... Of the spiral blade 4 are the same. They may be different or different, and the spiral blade 4 of each partial rotary shaft 2c is preferably replaceable with one having a different spiral pitch. In the present embodiment, the spiral blade 4 of one partial rotary shaft 2c has a length with which a single spiral pitch is formed as in the second embodiment device.

The variable-speed rotary transmission device 6 is configured such that each of a plurality of transmission shafts 6b ... Linked by gears 6a ... And the upper part of each partial rotation shaft 6b are connected by a bevel gear 6c. .

In the present embodiment, for example, the rotation of the prime mover is transmitted to any one transmission shaft 6b, and the rotation speed of each transmission shaft 6b is set to that of each partial rotation shaft 2.
When the spiral blade 4 of c cultivates the soil, the grain diameter of the cultivated soil is set to be smaller as compared with the spiral blade 4 of the upper partial rotation shaft 2c. At this time, the spiral pitch p1, p
When 2, p3, ... Is small, the grain size of the tilling soil is small even if the rotation speed is slow, so the rotation speed of the coaxial 6b is determined in relation to the spiral pitches p1, p2, p3 ,. Becomes Others are handled according to the apparatus of the previous embodiment.

FIG. 4 relates to a modification of the first embodiment device,
(A) is a side view partial view, and (b) is a plan view partial view. As shown in this figure, in each of the above-described embodiments, the spiral blade 4 is tilted at an appropriate position on the upper surface without permission. The cut plates 7 ... May be fixed upright. The cutting plate 7 causes the inclined inner surface s to bite into the uncultivated soil m in the plowing direction by the rotation of the spiral blade 4, and the biting force at this time improves the plowing action and the plowing force to the entire device. Will be caused.

FIG. 5 is a side view partial view showing another modification of the first embodiment device. As shown in this drawing, the spiral blade 4 is radially attached to the outer peripheral edge of each of the previous embodiment devices. It is also possible to provide the cutting teeth 8 having unevenness. The cutting teeth 8 cut the uncultivated soil in the plowing direction by the same action as the saw teeth and assist the tilling and plowing.

Further, FIG. 6 is a side view partial view showing still another modified example of the apparatus of the first embodiment. As shown in this figure, in each of the above-mentioned apparatus of the embodiments, the gas is integrally formed with the spiral blade 4. It is also possible to fix the supply pipe 9 and to provide hole means 9a ... For ejecting gas from the position of the supply pipe 9 at appropriate intervals to the lower surface side of the spiral blade 4. In this case, the spiral blade (4) includes a blade having a changed spiral pitch and a blade having a different spiral pitch. In this device, the gas supply pipe 9
Propane gas or the like is supplied to the inner hole of the hole means 9a ...
It is burned when it is ejected from. At this time, a gap is easily formed on the lower surface of the spiral blade 4 by the rotation thereof, and the combustion is smoothly performed to burn out pests and the like in the soil.

[0032]

According to the present invention configured as described above, the lower soil can be cultivated coarsely and the upper soil can be finely cultivated, and the lower soil and the upper soil can be efficiently mixed and stirred.

According to the second aspect, it is possible to handle each of the partial rotary shafts, and the work can be easily performed.

According to the third aspect, the lower soil can be coarsely cultivated and the upper soil can be finely cultivated without being influenced by the spiral pitch of the spiral blade.

According to the fourth aspect of the present invention, the plowing action is improved and the plowing force is generated in the plowing element.

According to the fifth aspect, the functions of tilling and plowing are assisted.

According to the sixth aspect, the pests and the like in the soil can be burned out by the gas flame during the plowing with the spiral blade. According to such a sterilization / insecticide method using a gas flame, there is no residue of agricultural chemicals on agricultural crops unlike the use of agricultural chemicals, and extremely safe agricultural crops can be supplied.

[Brief description of drawings]

1 relates to a first embodiment of a screw cultivating device of the present invention, (a) is an overall side view, and (b) is a sectional view taken along line xx.

FIG. 2 relates to a second embodiment of the screw cultivating device of the present invention, (a) is an overall side view, and (b) is a cross-sectional view taken along line x1-x1.

FIG. 3 is an overall side view of a third embodiment showing the screw tiller of the present invention.

FIG. 4 relates to a modified example of the first embodiment device, (a) is a side view partial view, and (b) is a plan view partial view.

FIG. 5 is a partial side view showing another modified example of the device of the first embodiment.

FIG. 6 is a partial side view showing still another modified example of the first embodiment device.

FIG. 7 is a diagram of a conventional example.

[Explanation of symbols]

 2 rotary shaft 2c partial rotary shaft 4 spiral blade 7 cutting plate 8 cutting tooth 9 gas supply pipe 9a hole means p1, p2 and p3 spiral pitch

Claims (6)

[Claims] 1. A screw characterized in that a spiral blade is fixed to a rotary shaft which is rotated around a vertical axis, and the spiral pitch of the spiral blade is reduced from the lower side toward the upper side. Tillage equipment. 2. A spiral blade having a different spiral pitch is fixed to each of a plurality of partial rotary shafts fixed in a straight line along the vertical axis, and these spiral blades are set to have a smaller spiral pitch as they go upward. A screw cultivating device characterized by being provided. 3. A screw cultivating device, characterized in that a spiral blade is fixed to a plurality of partial rotary shafts arranged linearly along the vertical axis, and each partial rotary shaft is rotated at different speeds. . 4. The screw tiller according to claim 1, 2, 3 or 4, wherein a notch plate inclined so as to bite is fixed in an upright position at an appropriate position on the upper surface of the spiral blade. 5. A cutting tooth which is provided with irregularities in the radial direction on the outer peripheral edge of the spiral blade.
The screw tiller according to 2, 3, 4 or 5. 6. A combustion gas supply pipe is fixed integrally with the spiral blade, and hole means for ejecting combustion gas from a position of each appropriate length of the supply pipe to the lower surface side of the spiral blade is provided. The screw tiller according to claim 1.