JPH0217121B2 - - 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]

As for this kind of air blower type soil improving machine, there is a known manual type as described in Japanese Patent Application Laid-Open No. 58-56603 (Blower Blowing Type Soil Conditioning Machine), which was previously proposed by the present applicant. In addition, the above-mentioned pneumatic soil improving machine mounted on the rear of a self-propelled vehicle such as a tractor is also disclosed in, for example, JP-A No. 58-126701 (Plowing Platform Softening Device) or JP-A No. It has been proposed in Publication No. 58-516601 (Self-propelled vehicle equipped with automatic tilling depth device). The former prior art described above (described in Japanese Patent Application Laid-open No. 58-56603) involves manually moving the soil improver and manually operating the blowhole at the moved position, whereas the latter prior art (Unexamined Japanese Patent Publication 1983-
126701, Japanese Patent Application Laid-open No. 58-216601) is easy to move because the blower device, which is the working part, is mounted on a self-propelled vehicle such as a tractor.
It also has the advantage of increasing the capacity of the compressor, etc., and the capacity of the air tank. However, this prior art method temporarily stops the self-propelled vehicle at the fume position and moves the fume system up and down while it is stopped. Since self-propelled vehicles are configured to operate the jets using a manual method, they have to frequently run and stop during work, and although they are easier to move than the former manual type, they have a negative impact on work efficiency. I don't expect much improvement. Therefore, in order to achieve expansion and softening of cultivated soil by air fumes even while driving, the fumarole part is plunged into the soil and towed, and during this process, compressed air is intermittently pumped into the soil from the fumarole part. A soil swelling and softening machine is proposed in Japanese Utility Model Application Publication No. 125201/1983, in which the soil is expanded and softened by causing cracks in the soil.

TECHNICAL PROBLEM OF THE INVENTION The present invention is a self-propelled tilling soil improving machine as seen in the above-mentioned prior art field, and this type of self-propelling tilling soil improving machine has the following problems. be.
In other words, the problem here is that a passage hole is formed in the soil as the fumarole advances, and when fumarole flows from the fumarole, compressed air can blow through the passage hole. It is. This blow-through phenomenon occurs because the pressure of the jet stream drops instantaneously due to the leakage of air from here, which prevents the compressed air from creating cracks in the soil. ) is no longer achievable. In addition, even if the entire amount of ejected air does not cause blow-through, the cracking effect will be reduced due to air leakage, and problems such as the inability to reliably expand and soften the cultivated soil to the depths of a given area may occur. It was hot.

[Purpose of the invention]

The present invention was proposed with the aim of solving the above-mentioned problem, and it is possible to prevent the fumarole from blowing through from the soil passage hole of the fumarole, and to ensure that the plowed soil in a predetermined area is plowed by compressed air. It is an object of the present invention to provide a self-propelled tillage soil improvement machine that can accurately achieve deep swelling and softening of soil by causing cracks in the soil.

[Structure of the invention]

For this purpose, the tillage soil improvement work machine according to the present invention includes a self-propelled vehicle equipped with a fumarole column that is attached to the vehicle and towed by the vehicle and moves vertically into the soil, and a fumarole column that is attached to the lower end of the column in the front and rear directions. and an air jetting body attached toward the support, the air jetting body having a blowhole at its front end, and the blowhole being installed above ground through an air supply passage provided along the pillar. In addition to being in communication with a compressed air supply source, a valve mechanism for controlling air jets from the blowholes is provided in this air supply line, and the air blowing body has an outer diameter relative to the front end side where the blowholes are opened. , the outer diameter of the rear side is made larger so that the passage hole in the soil formed by the advancement of the blowhole (front end side) is sealed by the large diameter part of the rear side while the jet is traveling. It is something to do.

【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 a three-point support link mechanism 4 consisting of a top link 2 and a lower link 3 is provided at the rear of the tractor 1. 4, a tillage improving work machine 5 according to the present invention is mounted on the rear of the tractor 1 so as to be movable 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. Further, a mounting base 9 is extended to the rear of the main body frame 6 at the rear position of the top mast 7, and a compressor 10 and a main tank 11 are mounted and equipped on the mounting base 9. The input shaft 10a of the compressor 10 is projected forward, and power is transmitted to the input shaft 10a from the PTO shaft 1a of the tractor 1 via a power transmission system 12 consisting of a universal joint and a propeller shaft. It's summery. The compressed air compressed by the compressor 10 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 pressure meter in the main tank 11. A safety valve, an unloader, etc. are provided to control the compressed air inside so that it does not exceed a predetermined pressure. Note that 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 ends of the main body frame 6. At the lower ends of the fume struts 14, an air jet 15 is oriented approximately horizontally in the front-rear direction. installed. The fume strut 14 is slightly inclined so that its lower end is located slightly forward of the base side of the upper part when viewed from the side, and a blade edge 14a is formed at its front edge. Further, an air supply pipe 16 is attached to the back of the fumarole strut 14. As shown in an enlarged view in FIG. 3, the air fume 15 has a cylindrical part 15a fixed to the lower end of the fume strut 14 with its axis directed in the front-rear direction. has a pointed tip portion 15b shaped like an arrowhead on the tip side, and a narrow diameter portion 1 behind the tip portion 15b.
5c is formed, and a fumarole 1 is formed in this narrow diameter portion 15c.
8 with an upward opening. From the cylindrical part 15a to the narrow diameter part 15c there is a ventilation hole 1.
7 is provided, and the tip of this vent hole 17 communicates with a blowhole 18. Furthermore, this fumarole 18
may be opened laterally (horizontally) or downward in the narrow diameter portion 15c. Therefore, the fumarole hole 18 opens into a narrow diameter portion 15c formed with a step a and a smaller diameter than the outer diameter h of the tip portion 15b.
8 to prevent the passage hole in the soil formed by the tip portion 15b from progressing and clogging. Further, the columnar portion 15a on the rear side has the tip portion 1
With respect to the outer diameter dimension h of 5b, there is a further step A than that.
It is formed to have a large outer diameter H, so that the front end of the columnar part 15a seals the passage hole formed when the tip part 15b passes through the soil during the advancement process. is formed. Furthermore, the other end of the vent hole 17 opened to the air jet 15 is in communication with the lower end of the air supply pipe 16 , and the upper end of the air supply pipe 16 is connected to the jet holder 14 through the solenoid valve 19 . It is connected to sub-tanks 20 provided on both sides of the base. The solenoid valve 19 is opened and closed by a switch mechanism (not shown) in a switch box 19a provided at the rear of the compressor 10, and the opening and closing timing of this valve 19 can be adjusted as appropriate. It's summery. Further, the main tank 11 and the sub-tank 20 are communicated with each other by a communication pipe 21, so that when the solenoid valve 19 is opened and the compressed air stored in the sub-tank 20 is ejected from the blowhole 18, the main tank 11 and the sub-tank 20 are immediately connected to each other. 11
A pipe 21 communicates compressed air from the sub-tank 20 to the sub-tank 20.
It is constructed so that the filling pressure is accumulated through the 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 is designed to cut the soil surface on which the fume column 14 moves to a predetermined depth. It's summery. Furthermore, in the above configuration, the hollow interior of the main body frame 6 may be used as a sub-tank. Further, the fumarole column 14 and the air fume body 15 are
It is not limited to one series, but may be more than one series. Further, the opening/closing means for the valve 19 may be replaced with another known mechanism and the valve may be opened/closed automatically or manually. Next, the operation of the above embodiment will be explained. The tillage improvement work machine 5 is attached to the rear of the tractor 1 via a three-point support link mechanism 4, and
Rotational power is transmitted from the PTO shaft 1a to the input shaft 10a of the compressor 10 via the power transmission system 12. When advancing, the fumarole column 14 and the air fume 15 are plunged from the ground to a predetermined depth and are towed by the tractor 1. During this towing, the coulter 23 cuts the field topsoil to a predetermined depth while blowing the fumarole afterward. The pillars 14 advance while cutting the soil left and right, and the air fumes 15 advance horizontally through the deepest layer. During this process, the solenoid valve 19 is opened by operating a switch in the switchbox 19a at predetermined timing intervals, thereby allowing the compressed air stored in the subtanter 20 to pass through the air supply pipe 16 and the vent hole 17. Fumarole 18
It is ejected forcefully upwards. As shown in Fig. 4, this ejection of high-pressure air causes
A crack region C is generated in the deep soil above 8, and this crack causes the deep soil to swell and soften. At this time, the fumarole hole 18 is opened into a narrow diameter part 15c with a step a from the outer diameter h of the tip part 15b of the air fumarole 15, as described above, and the inside of the passage hole of the preceding tip part 15b is opened. , since the fumarole holes 18 pass through, the fumarole holes 18 do not become clogged. Further, during the movement, the passage hole formed in the soil by the tip portion 15b has an outer diameter H of the rear columnar portion 15a passing behind it, which is larger than an outer diameter h of the tip portion 15b. Because of this, the front end surface of the columnar part 15a seals the passage hole during the movement, and this sealing action causes the blowhole 18 to close.
The compressed air emitted from the fumarole does not blow through through the passage hole, and cracks can be reliably caused in the soil by the compressed air generated by the fumarole from the fumarole. Note that during the progress, the fumarole column 14 is connected to the fumarole hole 18.
Since it passes through the crack region C caused by the fumes from the jet, the traction resistance due to the advancement of the fume struts 14 is significantly reduced. Furthermore, by appropriately selecting the fumarole timing or the amount of compressed air ejected depending on the soil conditions, the situation in which the crack region C occurs can be changed, and the relationship can be adjusted so that the support column 14 always moves through the crack region. It is possible. Note that the air jets from the left and right blowholes 18, 18 may be jetted at the same time, but they may be jetted alternately, and the jet pressure may be varied.

【Effect of the invention】

As is clear from the above explanation, according to the self-propelled soil improvement work machine of the present invention, the outer diameter of the air fume at the rear of the air fume with the fumarole opened is It is formed to have a larger diameter than the outer diameter of the blowhole, and the large-diameter rear side seals the soil passing hole formed by the front end side while advancing in the soil, so that the blower is not ejected from the fumarole. The compressed air
There is no inconvenience that blow-through occurs due to the passage hole in the soil formed by the advancement of the air fumarole, and the compressed air emitted from the fumarole reliably causes cracks in the cultivated soil in a predetermined area to the deep layer, causing soil swelling. Softening can be achieved accurately.

[Brief explanation of drawings]

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;
3 is a side sectional view of the air blower portion, and FIG. 4 is an explanatory diagram of the operation. DESCRIPTION OF SYMBOLS 1... Tractor, 1a... PTO shaft, 2... Top link, 3... Lower link, 4... Three-point support link mechanism, 5... Cultivating soil improvement work machine, 6... Main body frame, 7... Top mast , 8...Lower link pin, 9...Mounting stand, 10...Compressor, 10a
... Input shaft, 11 ... Main tank, 12 ... Power transmission system, 13, 21 ... Communication pipe, 14 ...
Fumarole strut, 14a...blade edge, 15...air fumarole, 15a...cylindrical part, 15b...tip part, 15
c...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 strut so as to face forward and backward; The air blowing body has a blowhole at its front end, communicates the blowhole with a compressed air supply source installed above ground through an air supply passage provided along the pillar, and connects the air supply system with a compressed air supply source installed above the ground. is provided with a valve mechanism for controlling the air jet from the blowhole, and the air blowing body has an outer diameter larger on the rear side than the outer diameter on the front end side where the blowhole is opened. A self-propelled tillage soil improvement machine with special features.