JPH0640762B2 - Self-propelled tillage improvement work machine - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to blow compressed air into a deep layer in soil with vigor, and to cause cracks in cultivated soil by the jet stream to expand and soften the soil. The present invention relates to a self-propelled tilling soil improvement working machine that can be supplied.

[Prior art]

As a self-propelled tiller of this kind, at the rear of the tractor,
The fumarole is equipped so that it can be pulled into the soil and towed, and during that process, compressed air is blown into the soil intermittently from the fumarole, causing cracks in the cultivated soil due to the jet flow. A soil loosening / working machine designed to loosen and soften the soil is proposed by Japanese Utility Model Publication No. 57-125201.

Technical Problem of the Invention

The above-mentioned type of self-propelled tillage improvement work machine has the following problems. That is, since the fumarole portion is in the form of plunging into the soil through the fumarole, the compressed air is formed in the gap between the fumarole and the soil or in the progress trace of the fumarole during the fumarole. This is a phenomenon that blows upward through the vertical groove. This blow-through phenomenon is because the pressure of the jet stream is instantaneously lowered by the leakage of air from here, so the effect of cracking into the soil by compressed air cannot be obtained, and the intended purpose (softening of the soil due to cracks) There is a problem that it cannot be achieved. Further, even if not all blown air does not blow through, the cracking effect is reduced due to air leakage, and there is a problem that problems such as the fact that the cultivated soil in a predetermined area cannot be surely softened to a deep layer . Further, in the self-propelled tillage improvement machine of the type described above, the working machine is usually connected to the tractor by using the three-point link hitch mechanism, but the conventionally known three-point link hitch mechanism is a hydraulic lifting device for the lower link. The work machine section (air spray gas) is not attached to the work machine section (air jet gas). It also has the drawback of floating upwards. For this reason, the position (depth) of the air jet gas that plunges into the soil and is towed becomes unstable, which causes a drawback that the depth of the soil softening region due to the jet air is not stable. Japanese Patent Laid-Open No. 59-42 discloses a device for preventing blow-by of fumes.
In the Japanese Patent No. 802, a box-shaped space is provided at the lower end of the fuming column, and the fumarole at the lower end of the air supply pipe is opened in this space. Further, in Japanese Utility Model Laid-Open No. 59-29102, an air leakage prevention plate is attached below the air blowing body. However, the box-shaped space portion or the air leakage prevention plate travels in the soil and has a very large area in the traveling direction. Therefore, a very large earth pressure is applied when advancing an air column supporting a box-shaped space or an air leakage prevention plate. Therefore, a self-propelled vehicle equipped with a large-scale power source capable of structurally making the fumaroles structurally robust in order to overcome earth pressure and generating a large traction force is required.

[Object of the Invention]

The present invention has been proposed as a problem to solve the above problems, in the vertical direction formed in the gap between the fumarine struts and the soil and the track of the fumarolic struts without receiving a large earth pressure. Prevents the jet stream from blowing upward from the passage groove, and also prevents the working machine part (air jet gas) that is mounted and towed by a self-propelled vehicle such as a tractor and advances in the soil from floating upward during the progress It is an object of the present invention to provide a self-propelled cultivating soil improvement working machine that is improved so that the fumarolic depth can be kept constant.

[Constitution of the invention]

In order to achieve the object, the self-propelled cultivating soil improving working machine of the present invention is mounted on a self-propelled vehicle and propelled vertically into the soil to advance in a vertical direction, and at a lower end position of the fumed column. An air ejector having a concave portion with a front side surface provided with a fumarole, which is attached in the front-rear direction, and a compressed air supply source installed along the fumarole, which is installed on the ground portion, to eject the air. An intake passage connected to the body, and a flat plate-like shape that is attached to the upper part of the air ejection body in the vicinity of the lower end of the squirt strut at a slanting angle with the front slightly lowered and extends laterally from both sides of the squirt strut. And an upward flow of the compressed air ejected from the fumaroles of the air ejector along the fumar strut is laterally deflected by the vane.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a well-known riding type tractor, and in the rear portion of the tractor 1, a conventionally known three-point link hitch including one top link 2 and two left and right lower links 3. Through the mechanism 4, the tillage improvement working machine 5 according to the present invention is mounted so as to be vertically movable. 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 connected to the lower link 3. And a mounting base 9 extending rearward at the rear of the main mast 7 at the rear position of the top mast 7, and the compressor 10 and the main tank are mounted on the mounting base 9. 11 and 11 are equipped on the front and rear. 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 including a universal joint and a propeller shaft. There is. The compressed air compressed by the compressor 10 is accumulated in the main tank 11 via the communication pipe 13, and although not shown here, the compressor 10 and the main tank 11 have a pressure meter and a main tank 11. A safety valve, an unloader, and the like are provided to control the compressed air inside so as not to exceed a predetermined pressure. The compressor 10 and the main tank 11 may be provided on the tractor 1 side. The main body frame 6 is provided with a pair of jet struts 14 that hang downward at both left and right ends thereof, and an air jet gas 15 is attached to the lower end of the jet struts 14. The fuming column 14 is slightly inclined such that the lower end thereof is located slightly forward of the upper base side in a side view, and a blade edge 14a is formed at the front edge thereof. Further, an air supply pipe 16 is attached to the back of the fume support column 14. As shown in the enlarged view of FIG. 3, the air jet gas 15 has a columnar portion 15a fixed at the lower end of the gas jet column 14 with its axis oriented in the front-rear direction, and the front side of this columnar portion 15a. The nozzle portion 15b is fixed to the nozzle portion 15b, and the nozzle portion 15b is formed in a pointed shape with a tip end in an arrow shape.
Further, a small-diameter portion 15c is formed behind the tip portion, and the periphery thereof becomes a recess. The fumarole 18 is opened upward in the small diameter portion 15c. The fumarole 18 is then the nozzle
The small diameter portion 15c formed with a step a smaller than the outer diameter dimension h of 15b is opened to the small diameter portion 15c, and the fumarole 18 is
It is designed so as not to cause clogging by advancing through a passage hole in the soil formed by the tip of the nozzle portion 15b, and the cylindrical portion 15a on the rear side is larger than the outer diameter dimension h of the nozzle portion 15b. The outer diameter H is formed with a step A further than that, so that the passage hole of the nozzle portion 15b is
The front end of the cylindrical portion 15a is formed so as to be hermetically sealed in the course of the progress. A ventilation hole 17 is provided from the cylindrical portion 15a to the small diameter portion 15c, and the tip of the ventilation hole 17 communicates with the fumarole 18. The fumarole 18 may be opened laterally (horizontally) or downward in the small diameter portion 15c. Further, in the present invention, flat blades 25 are attached to both sides of the lower end of the jet column 144 located above the air jet gas 15. This wing body 25 is mounted so as to be inclined so that its rear side is directed upward with a required angle α with respect to a horizontal line L-L parallel to the cultivated soil surface. The rear ends of the left and right blades 25 attached to the base are connected to the back of the fumarolic support column 14 and extend rearwardly beyond the support column 14. In addition, the other end of the vent hole 17 opened to the air jet 15 is provided along the back of the jet strut 14 and communicates with the lower end of the air supply pipe 16 forming the air supply passage. , The upper end of the air supply pipe 16 is connected to the fuming column 1 via the solenoid valve 19.
It is communicated with the sub-tanks 20 provided on both sides of the base of the. The solenoid valve 19 is opened / closed by a switch mechanism (not shown) in a switch box 19a provided at the rear of the compressor 10, and the opening / closing timing of the valve 19 can be appropriately adjusted. Also the main tank
11 and the sub tank 20 are connected by a communication pipe 21, and when the solenoid valve 19 is opened and the compressed air stored in the sub tank 20 is ejected from the fumarole 18, immediately after that,
Immediately, compressed air is filled and accumulated from the main tank 11 to the sub tank 20 through the communication pipe 21. A coulter 23 is supported on the front side of the fumarole 14 via a support arm 22 extending forward from the body frame 6, and this cuts the soil surface on which the fumarole 14 moves to a predetermined depth. I am trying. Next, the operation of the above embodiment will be described. The tillage improvement work machine 5 is attached to the rear part of the tractor 1 via a three-point link hitch mechanism 4, and transmits rotary power from the PTO shaft 1a of the tractor to the input shaft 10a of the compressor 10 via the power transmission system 12. . When moving, the jet support 14 and the air jet 15 are made to plunge from the ground to a predetermined depth and pulled by the tractor 1.
23 progresses while making a cut in the field topsoil to a predetermined depth, and then the fumarolic struts 14 proceed while cutting the soil left and right,
The air jet gas 15 advances horizontally in the deep part of the cultivated soil. During this process, the solenoid valve 1 is operated by operating the switch in the switch box 19a at a predetermined timing interval.
When the solenoid valve 19 is opened at a predetermined timing interval, the compressed air stored in the sub-tank 20 is forced upward from the fumarole 18 through the air supply pipe 16 and the vent hole 17. It is often spouted. As shown in FIG. 4, the jetting of the high-pressure air causes a crack (crack region C) in the upper deep soil from the fumarole 18, and during the progress, the fumes of compressed air are sequentially arranged at predetermined timing intervals. By being performed, the crack area C
Is the continuous expansion and softening of cultivated soil. In this working process, as described above, the wing bodies 25 are located above the air jet gas 15 and on both sides of the lower end portion of the jet post 14, and extend in the front-rear direction, and the rear end side is a horizontal line L-L parallel to the cultivated soil surface. Since it is attached so as to incline upward at a required angle α with respect to the wing body 25, the gap between the fumar strut 14 and the soil is formed by the wing body 25 when the jet flow is directed upward when the compressed air is jetted. The passages in the vertical direction that are blocked and that are formed in the traces of the fumarole strut 14 are also wing bodies 25.
Since it is blocked at the rear part, the jet air flow bypasses the horizontal part of the wing body 25 and flows upward, and as a result, the jet air flow is prevented from passing upward and the cracking effect of the cultivated soil is enhanced. be able to. In addition, while advancing, the upper surface of the wing body 25 advances so as to push up the uncultivated soil in the deep part of the cultivated soil as indicated by the arrow in FIG. 3, and as a result, the reaction force causes the fumes 14 and the air fumes 15 to move.
Is pressed downward, and the floating of the air jet gas 15 is prevented. This downward pressing action is restricted by the coulter 23 traveling on the surface of the cultivated soil in front of the air spray gas 15, so that the air spray gas 15 travels at a constant level in the cultivated soil deep layer portion of a predetermined depth. As a result, the fumes 18 of the air fumes 15
The crack region C generated in the cultivated soil by the compressed air blown from the ground has a constant depth. Further, while the work is in progress, due to the action of pushing up the uncultivated soil by the upper surface of the wing body 25, the cultivated soil after passing through the wing body 25 has an effect that the blowout of the jet airflow is prevented because the soil particles become dense. There is. Further, the air jet gas 15 is formed in the soil by the nozzle portion 15b during the progress when the rear cylindrical portion 15a is formed to have a large diameter with respect to the nozzle portion 15b at the tip as in the illustrated embodiment. The passage hole to be formed is sealed by the front end face of the rear cylindrical portion 15a passing behind it, so that the sealing action also prevents the compressed air blown from the blow hole 18 from blowing through the passage hole. The crack effect can be enhanced also from the point. In the illustrated embodiment, the wing body 25 is attached to the lower end portion of the fuming column 14, but the attachment position of the wing body 25 may be attached to another member traveling in the soil. Further, in the practice of the present invention, the air fumes from the left and right fumaroles 18, 18 may be fumed at the same time, but they may be fumed alternately, and the hollow interior of the main body frame 6 is used as a sub tank. You may. Also, the fumarole 14
The air jet gas 15 is not limited to the two shown in the drawing, and may be more than one. Further, the opening / closing means of the valve 19 may be changed to another known mechanism so that the valve can be opened or closed automatically or manually. You may

【The invention's effect】

As is clear from the above description, according to the self-propelled cultivating soil improving working machine of the present invention, the rear side is upward with respect to the horizontal line parallel to the cultivated soil surface at the upper position of the air fumes 15 having the fumarole holes opened. Since the wing body 25 is installed so as to be inclined, the following effects can be obtained. When the compressed air is ejected, the gap between the fumarole 14 and the soil is blocked by the wing body 25 when the ejected airflow is directed upward, and there is also a vertical passage groove formed in the track of the fumarole 14. Wings 25
Since it is blocked at the rear part, the jet air flow bypasses the horizontal part of the wing body 25 and flows upward, and as a result, the jet air flow is prevented from passing upward and the cracking effect of the cultivated soil is enhanced. be able to. In addition, during the progress, the upper surface of the wing body 25 advances so as to push up the uncultivated soil in the deep layer of the cultivated soil, and the reaction force pushes the fumes strut 14 and the air fumes 15 downward, so that the air fumes 15 rise up. As a result, the air jet gas 15 advances at a constant level in the cultivated soil deep layer portion having a predetermined depth, so that the depth of the crack region C caused in the cultivated soil by the air jet is made constant. Can be kept. Further, during the progress of the work, due to the action of pushing up the uncultivated soil by the upper surface of the wing body 25, the soil particles in the cultivated soil after passing through the wing body 25 become dense, which prevents blow-through of fumaroles from this point. There is also the effect that the cracking effect can be further enhanced. Since the wing body 25 has a flat plate shape attached to the fumarolic support column 14 at a tilt angle α which is slightly lowered forward,
The earth pressure received by the wing body 25 becomes smaller when the wing moves forward. Moreover, the earth pressure can be released along the surface of the wing body 25. Therefore, there is no need to make the fumarole 14 more robust than necessary or to use a power source with an extremely large traction force.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a rear view of a part of a cultivating soil improving working machine, and FIG. 3 is a partially longitudinal side view of a part of an air spray gas which is an essential part of the present invention. FIG. 4 and FIG. 4 are explanatory views of the operation. 1 ... tractor, 1a ... PTO axis, 2 ... top link, 3 ... lower link, 4 ... 3-point link hitch mechanism,
5: Plow soil improvement work machine, 6 ... Main body frame, 7 ... Top mast, 8 ... Lower link pin, 9 ... Mounting base, 10
...... Compressor, 10a …… Input shaft, 11 …… Main tank, 12
...... Power transmission system, 13, 21 ...... Communication pipe, 14 ...... Fumer column, 14a ...... Blade edge, 15 ...... Air jet gas, 15a ...... Cylinder part,
15b ... Nozzle part, 15c ... Small diameter part, 16 ... Air supply pipe, 17 ...
… Vent hole, 18 …… Fume hole, 19 …… Solenoid valve, 19
a ... Switch box, 20 ... Sub tank, 22 ... Support arm, 23 ... Coulter, 25 ... Wing body, C ... Crack.

 ─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-59-42802 (JP, A) JP-A-56-78501 (JP, A) JP-A-56-163309 (JP, A) Actual development Sho-59- 29102 (JP, U) Actually opened 57-125201 (JP, U) Actually opened 57-94301 (JP, U)

Claims (1)

[Claims] Claims: 1. A fumes column propelled by a self-propelled vehicle that vertically penetrates into the soil and advances, and a bottom end position of the fumes column, which is attached in the front-rear direction, and has a fumarole on a front side surface. An air ejection body having a bored recess, an air intake passage provided along the air ejection strut for connecting a compressed air supply source mounted on the ground portion to the air ejection body, and a position above the air ejection body. In the vicinity of the lower end of the fuming strut is attached to the front downward with an inclination angle slightly lowered forward, and is equipped with a flat blade body extending laterally from both sides of the fuming strut,
A self-propelled tillage improvement working machine characterized in that an upward flow of compressed air ejected from the fumaroles of the air ejector along the fumar strut is deflected laterally by the blade body.