JPH0335881B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention makes it possible to forcefully blow compressed air into the deep layer of the soil, to cause cracks in the cultivated soil by this jet flow, to expand and soften the soil, and to supply air into the soil. , relates to a self-propelled tillage soil improvement work machine.

[Prior art]

This type of self-propelled soil improvement machine is equipped with a blowhole at the rear of the tractor so that it can be pulled into the soil, and compressed air is intermittently supplied from the blowhole during the movement process. Japanese Utility Model Application Publication No. 125201/1987 proposes a soil swelling and softening machine that creates cracks in the cultivated soil by emitting fumes into the soil, thereby swelling and softening the soil. .

[Technical problem of the invention]

The above-mentioned self-propelled tilling soil improving machine installed at the rear of the tractor has the following problems. In other words, this type of hitch mechanism normally connects the work machine to the tractor using a three-point link hitch mechanism.The conventional three-point link hitch mechanism only has a hydraulic lifting device attached to the lower link, and during work, the work machine is not connected to the tractor. This method has the disadvantage that the work implement section (air jet) floats upward compared to the case where the work implement is kept in a floating state without vertical control and the work implement is pressed downward only by its own weight. For this reason, the position (depth) of the air fumarole that enters the soil and is pulled forward becomes unstable, and as a result, the depth of the soil swelling and softening region caused by the fumarole is also unstable.

[Purpose of the invention]

The present invention was proposed with the aim of solving the above-mentioned problem.The present invention was proposed with the aim of solving the above-mentioned problem. The purpose of the present invention is to provide a self-propelled tillage soil improvement work machine that is improved so as to prevent the fume from floating to a constant level and maintain a constant fume depth, and at the same time prevent the fume from blowing through. be.

[Structure of the invention]

In order to achieve the purpose of the tillage soil improvement work machine of the present invention, a fumarole column is installed on a self-propelled vehicle and is towed by the vehicle and moves vertically into the soil. and an air jetting body attached in the front-rear direction, the air jetting body having:
It is composed of a large-diameter cylindrical part and a small-diameter nozzle part fixed to the front surface of the cylindrical part via a step,
A fumarole is provided in the nozzle portion, and the entire air ejecting body is installed so that at least its upper surface is inclined linearly so that the front side faces downward with respect to a horizontal line parallel to the cultivated soil surface. communicates with a compressed air supply source installed on the ground part through an air supply passage provided along the pillar, and a valve mechanism for controlling air jets from the blowhole is provided in this compressed air supply line. It is characterized by becoming.

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a well-known riding type tractor, and the rear of the tractor 1 has a conventionally well-known three-point link hitch mechanism consisting of one top link 2 and two left and right lower links 3. 4, a tilled soil improving work machine 5 according to the present invention is mounted so as to be able to move up and down. As shown in FIG. 2, the tillage improvement work machine 5 includes a hollow main body frame 6 extending in the left-right direction, a top mast 7 connected to the top link 2, and a lower link pin 8 connected to the lower link 3. In addition, at the rear of the top mast 7 and at the rear of the main body frame 6, a mounting base 9 is provided extending rearward, and a compressor 10 and a main tank 11 are mounted on this mounting base 9. are installed on the front and rear. The input shaft 10a of the compressor 10 is projected forward, and the tractor 1 is connected to the input shaft 10a.
Power is transmitted from the PTO shaft 1a through a power transmission system 12 consisting of a universal joint and a propeller shaft. The above compressor 1
The compressed air compressed at zero is stored in the main tank 11 via the communication pipe 13, and although not shown here, the compressor 10 and the main tank 11 are equipped with a pressure meter and a compressor in the main tank 11. A safety valve, an unloader, etc. are provided to control the air so that it does not exceed a predetermined pressure. In addition, these compressor 10 and main tank 11
may be provided on the tractor 1 side. A pair of fume struts 14 hanging downward are attached to the left and right end portions of the main body frame 6, and an air fume body 15 is attached to the lower ends of the fume struts 14. The fumarole column 14
is slightly inclined so that its lower end is located slightly forward of the base of the upper part when viewed from the side, and a blade edge 14a is formed at its front edge. Also, fumarole column 1
An air supply pipe 16 is attached to the back of 4. As shown in detail in FIG. 3, the air fume 15 includes a cylindrical part 15a fixed to the lower end of the fume strut 14, and a nozzle part 15b fixed to the front side of the cylindrical part 14. ing. And cylindrical part 1
A step is formed between 5a and nozzle portion 15b. The nozzle portion 15b is formed into a pointed shape with an arrowhead-like tip, and a narrow diameter portion 15c is formed at the rear of the tip.
The blowhole 18 is opened upward. Particularly in the present invention, the air jet 15 consisting of the cylindrical portion 15a and the nozzle 15b has an axis M-M on the lower end side of the jet strut 14.
A required angle α with respect to the horizontal line L-L that faces in the front-back direction and whose front side is parallel to the cultivated soil surface.
It is characterized in that it is attached so as to be inclined downward with a cylindrical part 15a to a narrow diameter part 15c, and a ventilation hole 17 is provided from the cylindrical part 15a to the narrow diameter part 15c.
The tip of this vent hole 17 is communicated with the fumarole hole 18 . Note that this blowhole 18 may open sideways (horizontally) or downward in the narrow diameter portion 15c. The other end of the vent hole 17 opened to the air jet 15 communicates with the lower end of the air supply pipe 16 attached to the back of the jet strut 14.
The upper end of the fuel injection column 14 is in communication with a sub-tank 20 provided on both sides of the base of the jet strut 14 via a solenoid valve 19 . The solenoid valve 19 is a switch box 19 provided at the rear of the compressor 10.
It is opened and closed by a switch mechanism (not shown) inside the valve 19, and the opening and closing timing of this valve 19 can be adjusted as appropriate. Also, a communication pipe 21 is connected between the main tank 11 and the sub tank 20.
When the solenoid valve 19 is opened to blow out the compressed air stored in the sub-tank 20 from the blowhole 18, the compressed air immediately flows from the main tank 11 to the sub-tank 20 via the communication pipe 21. It is configured so that the filling pressure is accumulated. A coulter 23 is supported on the front side of the fumarole column 14 via a support arm 22 extending forward from the main body frame 6, and this coulter 23 cuts the soil surface on which the fumarole column 14 moves to a predetermined depth. I try to go. Next, the operation of the above embodiment will be explained. The tillage improving machine 5 is attached to the rear of the tractor 1 via a three-point link hitch mechanism 4, and transmits rotational power from the PTO shaft 1a of the tractor to the input shaft 10a of the compressor 10 via a power transmission system 12. .
When moving forward, the fumarole column 14 and the air fume body 15 are plunged from the ground to approximately a predetermined depth and are towed by the tractor 1. During this towing,
The coulter 23 advances while making incisions in the field topsoil to a predetermined depth, followed by the fumarole column 14 while cutting the soil left and right, and the air fumarole 15 advances horizontally in the deep layer of the cultivated soil. During this process, the solenoid valve 19 is opened at predetermined timing intervals by operating a switch in the switch box 19a. When the solenoid valve 19 is opened at predetermined timing intervals, the compressed air stored in the sub-tank 20 is released. , the blowhole 18 through the air supply pipe 16 and the ventilation hole 17
It is ejected forcefully upwards. As shown in Fig. 4, this ejection of high-pressure air causes cracks (crack region C) in the deep soil above the fumarole 18, and as the fumarole progresses, the fumes of compressed air are ejected at predetermined timing intervals. By performing this in order, the soil in the crack area C is expanded and softened in succession. In this work process, as mentioned above, the air fume 1
5 is installed so that its axis M-M faces in the front-rear direction, and the front side is inclined downward at a required angle α with respect to the horizontal line L-L parallel to the cultivated soil surface. During the process, the upper surface of the air fume 15 pushes up the uncultivated soil in the deep layer of the cultivated soil as shown by the arrow in Figure 3, and as a result, the air fume 15 is pushed downward by the reaction force, and the air Fumarole 1
5 is prevented from rising. This downward pressing action is caused by the air fume 1
Coulter 23 moving on the cultivated soil surface in front of 5
By being regulated by the air fume 15
As a result, the compressed air emitted from the fumarole 18 of the air fumarole 15 in the cultivated soil forms a Kratsu region C that has a constant depth. . Further, during the work, the above-mentioned upper surface of the air fumarole 15 pushes up the uncultivated soil, and the cultivated soil after passing the fumarole 15 becomes dense with soil particles, thereby preventing the fumarole flow from blowing through. It is also effective and can enhance the cracking effect. Furthermore, if the cylinder part 15a at the rear is formed to have a larger diameter than the nozzle part 15b at the tip as in the illustrated embodiment, the air jet 15 will sink into the soil by the nozzle part 15b while traveling. The passage hole formed in the rear columnar part 15a passes behind it.
Since the front end surface of the pipe is sealed, this sealing action also prevents the compressed air emitted from the blowhole 18 from blowing through the passage hole, and from this point of view as well, the cracking effect can be enhanced. As shown in FIG. 5, the air jet 15 has a cylindrical portion 15a and a nozzle portion 15b.
The bottom surface of the air fume 15 may be cut off horizontally.In other words, while the air fume 15 is traveling, its top surface is inclined so that the front side faces downward with respect to the horizontal line L-L parallel to the cultivated soil surface. It is good if it is. In addition, in carrying out the present invention, the left and right blowholes 18,
The air fumes from No. 18 may be emitted at the same time, but
This may be done alternately, or
The hollow interior of the main body frame 6 may be used as a sub-tank. Further, the fume struts 14 and the air fume bodies 15 are not limited to two as shown in the figure, but may be made in multiples.Furthermore, the means for opening and closing the valve 19 may be replaced with another known mechanism, and the valve may be opened automatically or manually. It may be opened and closed.

【Effect of the invention】

As is clear from the above description, according to the self-propelled tilled soil improvement work machine of the present invention, the air fumarole with the fumarole opened is oriented so that the upper surface of the air fume is directed downward with respect to the horizontal line parallel to the tilled soil surface. Since it is installed at an angle such that the following effect can be obtained. While the air fumarole 15 is advancing, the upper surface of the air fumarole 15 advances so as to push up the uncultivated soil in the deep layer of the cultivated soil as shown by the arrow in FIG.
5 is pushed downward, so the air fume 15
As a result, the air fumes 15 move at a constant level in the deep layer of the cultivated soil at a predetermined depth, so that the depth of the crack area C caused in the cultivated soil by the air fumes can be prevented. can be kept constant. Furthermore, on the rear side in the direction of movement of the working machine, uncultivated soil is pushed up by the large-diameter cylindrical portion 15a of the air blower 15, becoming denser and increasing air flow resistance. Therefore, the compressed air ejected from the fumarole hole 18 is prevented from flowing in the direction of the fumarole column 14 via the columnar portion 15a, rising along the fumarole column 14, and dissipating to the ground surface. As a result, blow-by of the fumarole is prevented, and the compressed air ejected from the fumarole 18 is effectively consumed for improving the soil, thereby increasing the cracking effect.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a rear view of the soil improvement work machine, Figure 3 is a partial longitudinal side view of the air blower which is the main part of the present invention, Figure 4 is an explanatory view of the action, and Figure 5 is the air blower. FIG. 3 is a partially longitudinal side view showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Tractor, 1a... PTO axis, 2... Top link, 3... Lower link, 4... Three-point link hitch mechanism, 5... Cultivating soil improvement work machine, 6... Main body frame, 7... Top mast, 8...Lower link pin, 9...Mounting stand, 10...Compressor, 10
a...Input shaft, 11...Main tank, 12...
Power transmission system, 13, 21...Communication pipe, 14...
... Fumarole strut, 14a... Blade edge, 15... Air fume, 15a... Cylindrical part, 15b... Nozzle part, 1
5c...Small diameter part, 16...Air supply pipe, 17...Vent hole, 18...Blow hole, 19...Solenoid valve, 19a...Switch box, 20...Sub tank, 22...Support arm, 23... ... Coulter, C...Kratsku.

Claims (1)

[Claims] 1 A self-propelled vehicle has a fumarole strut that is attached to and towed by the vehicle and moves vertically through the soil, and an air jet body that is attached to the lower end of the fume strut so as to face forward and backward. , the air jetting body is composed of a large-diameter cylindrical part and a small-diameter nozzle part fixed to the front surface of the cylindrical part via a step, and the nozzle part is provided with a blowhole to blow the air. The whole of the ejector is installed so that at least its upper surface is inclined in a straight line so that the front side faces downward with respect to a horizontal line parallel to the cultivated soil surface, and the blowhole is installed in an air supply passage provided along the support column. A self-propelled cultivated soil improvement device, characterized in that the compressed air supply system is connected to a compressed air supply source installed on the ground through a valve mechanism, and a valve mechanism for controlling air fumes from the fumarole is provided in the compressed air supply line. work equipment.