JPH0452085B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention involves driving a pipe having a fumarole at its tip into a clay pot, and then spouting compressed air from the fumarole to cause cracks in the deep layers of the clay pot. It makes it easy to deeply cultivate the soil, supplies air, or oxygen, to the roots of plants such as trees and crops, and promotes the activation of plants, improving the quality of harvested products and increasing yields. The present invention relates to a pneumatic soil improving machine.

[Conventional technology]

As this type of pneumatic soil improving machine, the present applicant has proposed an engine, a compressor driven by the engine, and a compressor that performs compression by the compressor, such as the one disclosed in Japanese Unexamined Patent Publication No. 58-98003. An air tank that stores pressurized air, a pipe that communicates with the air tank via an operating valve and hangs down from the bottom of the air tank and has a blowhole at its tip, and an automatic machine that drives the pipe into the soil using the engine as a power source. The driving mechanism constitutes a soil improving machine main body, and this main body, a frame main body that supports the main body so as to be able to rise and fall, and a soil improving machine main body that is raised with respect to the frame main body using an engine as a power source and inserted into the soil. We are proposing a device that is equipped with an automatic pulling mechanism that pulls out the pipe that has been driven in, so that the work of driving and pulling out the pipe can be performed easily and efficiently with little effort.

In this pneumatic soil improving machine, the compressor, automatic driving mechanism, and automatic pulling mechanism are driven by the same engine.

[Problem that the invention seeks to solve]

In such a pneumatic soil improvement machine, the present invention provides an automatic control mechanism that automatically sets the engine to an idling state when air is accumulated at a predetermined pressure in the air tank, thereby preventing the engine from running at unnecessary high speeds. The aim is to eliminate this problem and improve fuel efficiency. However, on the other hand, soil in fields where plants such as trees and crops are cultivated has different soil conditions, such as hardness and softness, soil quality, etc. When a pipe driven into a clay pot is pulled out to the rising end by an automatic pulling mechanism, the length of time is not constant. Therefore, when the automatic driving mechanism and automatic pulling mechanism operate while air is being pumped into the air tank, that is, when the engine is rotating at high speed and output is high, the pipe can be driven and pulled out smoothly. However, if air accumulates in the air tank to a predetermined set pressure before driving the pipe, or during driving or pulling out, the air tank becomes idling and the output decreases, causing the automatic driving mechanism and automatic pulling There was a problem that the mechanism did not work properly, causing the engine to stall in some cases.

[Means to solve the problem]

The present invention was conceived in view of the above circumstances, and the present invention maintains the engine in a high output state due to high speed rotation during the driving and pulling out of the pipe, so that the engine does not become idling and its output decreases. The present invention aims to provide a pneumatic soil improvement machine that prevents this from occurring, fully operates the automatic driving mechanism and automatic pulling mechanism, smoothly drives and pulls out pipes, and enables efficient deep plowing work. It is something to do.

In order to achieve this object, the present invention provides an automatic control mechanism that automatically controls the engine between an idling state and a high-speed rotation state, and this automatic control mechanism detects the air pressure in the air tank and adjusts the pressure to a predetermined level. A pressure detection switching mechanism that switches operation depending on whether the pressure reaches or falls below the pressure is interposed between the soil improvement mechanism main body and the frame main body,
A position detection switching mechanism that switches the operation by detecting when the soil improvement machine body is located at least in the rising end region and the falling end region with respect to the frame body and when it is located in the other region. When the soil improvement machine body is at least outside the rising end area with respect to the frame body, even if the air pressure in the air tank has reached the predetermined pressure, the automatic control mechanism will The engine is characterized in that it is configured so that the engine is automatically set to a high speed rotation state.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In the figure, symbol A indicates the soil improving machine body, Aa indicates the automatic driving mechanism, B indicates the frame body, C indicates the automatic control mechanism, and D indicates the automatic pulling mechanism.

The soil improving machine main body A is constructed as follows. An engine 3 is attached to the upper part of an air tank 1 via a mounting base 2, and a reducer 4 and a compressor 7 are directly connected to the output side of the engine 3. As shown in FIG. 6, the air tank 1 has a joint 1a,
It has a mounting frame portion 1b, a mounting seat portion 1c, a communication seat portion 1d, etc., and is communicated with the compressor 7 via a pipe 8 from the joint 1a. The engine 3 is equipped with a carburetor 300 as shown in FIG. This carburetor 300 is connected from the main body 310 to the throttle rod 31.
1 protrudes, and this throttle rod 311 is
It has the habit of being pulled downward by a spring (not shown) and becomes in an idling state, and a flange 31 is attached to the tip of the spring.
1a is provided. This flange portion 311a has one end fixed by a nut 313, and contacts one end of a swinging tool 314 which is pivotally supported by a pin 315 to be vertically movable at the other end of a mounting plate 312 bent upward at a right angle. The other end of the swinging tool 314 is connected to the flexible joint 31.
6 is provided. As shown in FIG. 1, a drive pulley 6 is attached to a drive shaft 5 protruding from the speed reducer 4.

As shown in FIGS. 1 and 10, the compressor 7 includes a cylinder 710, a packing 711, a seat plate 712, and a cylinder head 715. A valve plate 713 is attached to the seat plate 712 with screws 714. ,
The suction port 712a opens and closes only toward the cylinder 710 side, and the cylinder head 715 is partitioned into a suction chamber 716 and a discharge chamber 717 by a partition wall 715a. The suction chamber 716 communicates with the atmosphere through an air filter 718, and the pipe 8 is connected to the discharge chamber 717 through a joint 719.
A safety valve 720 is provided.

An operating valve 9 is provided at the bottom of the air tank 1 as shown in FIGS. 3 and 4.
A valve body 911 is housed in a valve housing 910, and this valve body 911 is connected to a valve shaft 912, a valve lever 913, and a short shaft 9.
14. The arm 915 is connected to an arm 915 pivotally supported on a support shaft 917 via a long hole 915a of the arm 915. The tip of the arm 915 and the locking piece 11 described later
A spring 916 is tensioned between the arm 915 and the arm 915, and a pedal 918 is attached to the proximal end of the arm 915, and the tension of the spring 916 normally causes the pedal 918 to move as shown in FIGS. 1 and 4. In this state, the operating valve 9 is closed and the pedal 918
When the operator depresses the button, the operation valve 9 is opened.

As shown in FIGS. 1 and 3, an inner pipe 10 is vertically disposed at the bottom of the air tank 1 and communicates with the air tank 1 via an operating valve 9.
This inner pipe 10 includes an inner pipe body 101
The flange 100 fixed to the upper end of the valve housing 9
10, and a flange provided at the upper end of the stroke tube 11 is fitted to the lower surface of this flange 100, and is integrally connected to the valve housing 910 fixed to the air tank 1 and supported together with the stroke tube 11. ing. The stroke cylinder 11 has a cylindrical body 11a, and has a brim-shaped blowout prevention plate 11b formed at the lower end thereof, and the locking piece 1 is attached to the blowout prevention plate 11b.
1c is integrally formed. Furthermore, as shown in FIG. 3, a gear housing 11d that constitutes the automatic driving mechanism Aa is formed on one side of the upper part of the stroke cylinder 11, and an outer peripheral portion of the stroke cylinder 11 that faces the gear housing 11d. A lid body 110 is fitted to the lid body 110 . The upper part of the outer pipe body 121 of the outer pipe 12 is inserted downward from a substantially intermediate position in the length direction of the inner pipe 10 so as to be movable up and down.
A sharp nozzle 14 is attached to the tip of the nozzle 14, and a plurality of jet holes 14a are opened in the circumferential direction slightly above the sharp end of the nozzle 14.

The automatic driving mechanism Aa is configured as follows. As shown in FIG. 2, a cylindrical case 15 is connected to the gear casing 11d, and an input shaft 16 is pivotally supported within the cylindrical case 15 and the gear casing 11d. is installed. Further, a bevel gear 18 is attached to the input shaft 16 in the gear housing 11d, and as shown in FIG.
The camshaft 20 is attached to one end of a camshaft 20 that is rotatably supported toward the camshaft 20. An eccentric cam 20a is attached to the other end of the camshaft 20.
However, it is provided with an eccentricity of Δl from the axis of the camshaft 20. When the outer pipe 12 slides along the inner pipe 10 and approaches each other, the ring 200 fitted on the circumferential surface of the eccentric cam 20a hits the receiver 120. Hit with a prescribed stroke, receiving object 1
The eccentric cam 20a does not strike the receiving body 120 when the lower surface of the eccentric cam 20a is in contact with the buffer body 13.

A V-belt 21 is wound between the drive pulley 6 and the input pulley 17.
1 is provided with a tension mechanism 22, and the outside of these belt transmission systems is covered with a transmission cover 23.

The soil improving machine main body A further includes the following configuration. An elevating body 24 shown in FIGS. 5 and 6 is attached to the outside of the air tank 1. This elevating body 24 is attached to the elevating frame 240 by tightening bolts 241 to the mounting frame portion 1b. A pair of lifting shafts 242 are provided, and a roller 243 is attached to each outer end of the lifting shaft 242. Furthermore, a pedal guide 25 is provided on one side of the pair of left and right lifting frames 240.

The frame main body B is constructed as follows. As shown in FIGS. 1, 5, and 6 (see FIG. 8), the guide rail 38 has a channel-shaped cross section, and the passage 3 of the guide rail 38
Each roller 243 of the elevating body 24 is housed in 8a, so that the elevating body 24 can move up and down. The guide rail 38 also includes a handle 3.
9, stand 40, horizontal frame 41, 41, ground frame 4
2. A reinforcing plate 43 and the like are provided, and a grounding frame 42 is also provided.
On the opposite side, a single wheel 46 is pivotally supported via a pair of axle bearings 44 and an axle 45, and the axle bearing 4
A footrest 47 is provided on one side of 4. Furthermore, a fall prevention mechanism 48 is provided on the upper part of the guide rail 38, as shown in FIG. In this fall prevention mechanism 48, a pivot 481 is inserted through a bracket 480, and the lower end of a lever 482 is integrally provided with a boss tool 483. 484 are provided. Further, a spring 488 is stretched between the lever 482 and a locking rod 489 protruding from the outside of the guide rail 38. A weight receiver 485 is provided at the lower part of the lever 482 so as to protrude into the guide rail 38 through the window hole 38b.
is provided, and this weight receiver 485 is provided with the lifting body 2
A weight receiving part 485a is provided to receive the roller 243 of No. 4, and the lower surface of the weight receiving tool 485
It forms b. An intermediate portion of the lever 482 facing the horizontal frame 42 is bent in a dogleg shape, and this bent portion is covered with a protective tube 486. Further, a grip 48 is provided at the upper end of the lever 482.
7 is provided.

On the other hand, the automatic control mechanism C is divided into a soil improving machine main body A side and a frame main body B side, and the soil improving machine main body A side is configured as follows. As shown in FIG. 6, a sensing unloader 26 as a switching mechanism for pressure detection, which is fixed to the air tank 1 on the side of the soil improvement machine main body A via the mounting seat 1c and communicated with the inside of the tank 1, is connected to a rod 26a. , a knob 26b, and a tube 27 is connected to this sensing unloader 26, and this tube 27 is connected to a three-way joint 28 attached to the air tank 1 via the communication seat 1d.
The other side is connected to one side of the valve mechanism 29 as a position detection switching mechanism via a communication tube 30, and the mounting frame portion 1b of the air tank 1 is connected to the valve mechanism 29 via an extension tube 32. It communicates with an operation unloader 31 screwed onto the.
The operation unloader 31 includes a rod 3 that can move up and down.
A thin rod 34 is inserted through a metal fitting 33 attached to the rod 31a, and the lower end of the thin rod 34 is locked on the lower side of the metal fitting 33 via a locking tool 35. As shown in FIG. 9, the upper end of the narrow rod 34 is inserted into and supported by the universal joint 316 of the carburetor 300 via an adjuster portion, and is locked with a locking tool 35. A relay tube 37 is connected to the communication seat portion 1d that communicates with the three-way joint 28, and this tube 37 communicates with an operating unloader 36 provided in the compressor 7 shown in FIG. is protected by a protector 721. Further, the actuating unloader 36 is provided with a rod 36a which is actuated by pneumatic pressure, and is adapted to press and release the valve plate 713 to open and close the valve plate 713.

As shown in FIGS. 5 to 8, the valve mechanism 29 includes a valve body 290 provided with an exhaust port 290a communicating with the outside, and the valve body 290 is fixed to the lifting frame 240 with bolts and nuts 292. It is fixed to the mounting stay 291 with a bolt nut 292, and a swinging arm 293 is pivotally supported on the valve train body 290 by a support shaft 294. The swinging arm 293 has a stopper 293a at one end and a pivot 296 at the other end. A driven wheel 295 is provided through each of the driven wheels 295 . Furthermore, the valve body 290 is provided with a valve rod 297 that is moved forward and backward by a rocking arm 293. As shown in FIG. It separates from one valve seat and abuts the other valve seat, thereby providing electrical continuity between the communication tube 30 side and the extension tube 32 side, and cutting off electrical communication between the extension tube 32 side and the exhaust port 290a. In the state shown in FIG. 7, the exhaust port 290a
The structure is such that electrical conduction occurs between the communication tube 30 side and the extension tube 32 side, and electrical continuity between the communication tube 30 side and the extension tube 32 side is interrupted.

On the frame body B side of the automatic control mechanism C, a cam body 64 as a position detection switching mechanism having a slope 64a at the lower end is provided in the rising end region of the guide rail 38 facing the driven wheel 295.
95 is adapted to make contact or release from contact.

The sensing unloader 26 senses the air pressure inside the air tank 1, and when the air pressure exceeds a predetermined pressure, an internal passage opens against a pressure detection spring (not shown) installed inside the sensing unloader 26, and the air pressure inside the air tank 1 opens. It has the function of circulating high-pressure air to the operation unloader 31 and the operation unloader 36 via tubes 27, 30, 32, and 37.
By pulling a, the operation of the automatic control mechanism C can be manually tested as needed.

The actuating unloader 36 is the sensing unloader 2
When the air pressure in the air tank 1 reaches a predetermined pressure or higher, the rod 36a inserted into the suction chamber 716 of the compressor 7 advances and starts the suction. Press the valve plate 713 of the port 712a and keep it open to prevent air compression even when the piston of the compressor 7 is reciprocating, and when the air pressure in the air tank 1 decreases. , a spring (not shown) in the operating unloader 36 causes the rod 36a to return to its pre-advance position, and the valve plate 7 of the suction port 712a
13, the compressor 7 is in steady operation,
High pressure air is forced to be fed from the cylinder 710 to the air tank 1 side.

The operation unloader 31 is activated by a spring (not shown) installed inside the air tank 1 when the air pressure inside the air tank 1 becomes equal to or higher than a predetermined pressure due to the air pressure inside the air tank 1, which is also provided via the sensing unloader 26 and the valve mechanism 29. The rod 31a protrudes against the pressure, and when the air pressure decreases, the rod 31a is operated by a spring to return to the position before protrusion and retreat. Then, together with the rod 31a, a metal fitting 33, a locking tool 35,
As the narrow rod 34 rises, the throttle rod 311 of the carburetor 300 is pulled down by the downward tension of the spring, and when the rod 31a returns and retreats, the narrow rod 34 is pulled down together with the metal fitting 33 and the locking tool 35. , the throttle rod 311 is pulled up.

The automatic extraction mechanism D is configured as follows. First, on the frame body B side, at the upper position of the guide rail 38, a band hook 49, a disk 49a, a stay 50,
A guide rod 51 and the like are provided, and an abutment plate 52 is fixed to the stay 50 with screws 53. Then,
As shown in FIG. 2, on the soil conditioner main body A side, reference numeral 54 is a reduction gear case, and a harmonic drive type reduction mechanism 55 is installed inside this reduction gear case 54. In this speed reduction mechanism 55, a wave generator is mounted on the end of the input shaft 16, a fixed side circular spline is provided on the speed reducer case 54, and a rotating side circular spline is installed on a holding member integrated with the output shaft 56. A flex spline is interposed between the wave generator and the fixed side and rotating side circular splines. Further, a spline portion 56a is formed on the output shaft 56, and a winding bobbin 57 is pivotally supported on the front side of the spline portion 56a via a bearing 58. shaped meshing surface 570a (see Fig. 5)
A dog clutch 59 having an advanced engagement surface 590a of a clutch pawl 590 that engages and disengages from the clutch pawl 590 and a circumferential groove 591 is slidably inserted into the spline portion 56a, and is inserted between the winding bobbin 57 and the dog clutch 59. A spring 60 is interposed to urge the winding bobbin 59 away from the winding bobbin 57, and the outside thereof is covered by a boot 61 fitted into the sleeve 571.

An actuation mechanism 62 for actuating the automatic extraction mechanism D
As shown in FIGS. 2 and 5, the support 620
is attached to the mounting seat 54a of the reducer case 54 with screws 621, and a linking tool 622 having one end 622a, an intermediate cylindrical part 622b, and the other end 622c is pivoted to this support 620 via a mounting shaft 623. Further, an actuating tool 624 is pivotally supported via a pivot shaft 625. This actuator 624 includes a shifter 624a, a cylinder shaft portion 624b, and an engagement arm 624.
c, a mounting boss portion 624d, etc. are provided. Further, a lock bolt 626 is provided on the attachment boss portion 624d of the actuator 624, and the actuator 624 and the pivot shaft 625 are integrally constructed. One end 622a of the linking tool 622 is attached to the arm 915.
The other end 62 is engaged with the engagement hole 915b provided in the
2c is engageably opposed to the engagement arm 624c, and the shifter 624a engages with the circumferential groove 591 of the dog clutch 59, and the shifter 624a
A plywood plate 52 is placed in front of the upward trajectory. Note that reference numeral 627 is a guide rod for the winding bobbin 57. The other end of the belt-shaped hanging tool 63 has one end wrapped around the band hook 49 and secured with a rivet.
The winding bobbin 5 passes through the upper side of the guide rod 51.
7 and is wound spirally around the outer periphery of the winding bobbin 57.

Next, the operation of the pneumatic soil improving machine of this embodiment will be explained.

First, with the soil improving machine main body A held in the raised position relative to the frame main body B, the frame main body B is tilted to ground the single wheel 46, and the pneumatic type I push the soil improvement machine. Here, the grounding frame 42 is grounded on the ground surface GL, and the frame body B is made to stand upright on the soil as shown in FIG. In this state,
The upper roller 243 is supported by the weight receiving part 485a of the weight receiving tool 485 provided in the fall prevention mechanism 48 (see FIG. 11), and the nozzle 14 of the outer pipe 12
The lower side is located slightly above the lower end of the grounding frame 42, so that the soil improving machine main body A is held by the frame main body B and does not descend, and the driven wheel 295 of the valve mechanism 29 is mounted on a cam body as shown in FIG. 64 and valve lever 29
7 is pushed in, and the tubes 30 and 32 are electrically connected. When the air pressure in the air tank 1 does not reach a predetermined pressure, the engine 3 closes the internal passage of the sensing unloader 26, and the operating unloader 31 pulls up the throttle rod 311 of the carburetor 300 to rotate at high speed. , air tank 1
When the air pressure inside reaches a predetermined pressure, the sensing unloader 26 operates and, contrary to the above, the throttle rod 31
1 is pulled down and becomes idling. Further, the hanging tool 63 is spirally wound around the winding bobbin 57, and the clutch 59 is in a disconnected state in which the clutch pawls 570 and 590 are disengaged.
is retained. In this state, hold the grip 487 of the lever 482 and rotate the lever 482 against the spring 488, so that the weight receiving part 485 of the weight receiving tool 485
When the support of the roller 243 by 85a is released,
The soil improvement machine body A slightly descends relative to the frame body B due to its own weight, and the lower end of the nozzle 14 touches the ground, and the weight of the soil improvement machine body A acts on the outer pipe 12, causing the inner pipe 10
A receiver 120 provided at the upper end of the outer pipe 12 for sliding action with the cam 20a comes into contact with the cam 20a.
The entire weight of the soil improvement machine main body A is applied to the receiver 120 of the outer pipe 12 via a. At the same time, the automatic driving mechanism Aa operates, and the cam 20a moves Δl.
Since the receiving body 120 is eccentric by the rotation of the cam 20a, the outer pipe 12 is driven into the soil while the soil improvement machine main body A is lowered.

At this time, the driven wheel 295 and the cam body 64 come out of contact (see FIG. 7), the conduction between the tubes 30 and 32 is cut off, and the tube 32 is connected to the exhaust port 295.
The carburetor 300 is operated via the operation unloader 31 through electrical connection with the air tank 1, and the engine 3 rotates at high speed and produces high output regardless of the air pressure in the air tank 1.

Then, when the outer pipe 12 is driven to a predetermined depth and the soil improving machine main body A reaches its descending end as shown in FIG.
8, the arm 915 rotates and the valve body 9
11 opens, and the high-pressure air in the air tank 1 is ejected into the soil from the blowhole 14a of the nozzle 14 provided at the tip of the outer pipe 12. This fumarole causes cracks in the soil around the fumarole 14a, deepening the plowing, and supplies oxygen to the plants.
Almost simultaneously with this jet, the rotation of the arm 915 causes the actuator 624 to rotate via the link 622, so the dog clutch 59 moves toward the take-up bobbin 57 against the spring 60, and the clutch claws 570 and 59
0 is engaged. Further, while the engine 3 maintains high-speed rotation, its driving force is transmitted from the output shaft 56 to the take-up bobbin 57 via the dog clutch 59, and the lifting tool 63 is wound onto the take-up bobbin 57, and the soil improving machine body is A begins to rise relative to the frame body B. As the soil improvement machine main body A rises, the receiver 120 is supported by the stroke tube 11 via the buffer 13, and the outer pipe 12 driven into the soil is pulled out.

Since the rollers 243 of the soil improving machine main body A are guided by the guide rails 38, the posture when rising is restricted, and the outer pipe 12 is pulled out vertically. Furthermore, as the hanging tool 63 is wound onto the winding bobbin 57, its diameter gradually increases.
The soil improvement machine main body A is slow at the beginning of the ascent, but gradually rises faster as it ascends, and can be raised in a short time. Since the speed is slow, there is less burden on the engine 3 and the drive power transmission system.

Furthermore, when the outer pipe 12 is pulled out from the soil pot, the soil improvement machine main body A rises above the grounding frame 42, and the upper roller 243 pushes the oblique side 485b of the weight receiver 485 from below against the spring 488. The weight receiver 485 is pulled out of the guide rail 38 and reaches above it. When the soil improving machine main body A rises to its upper limit, the dog clutch 59 is moved in the direction away from the take-up bobbin 57 via the shifter 624a due to the collision between the abutment plate 52 and the engagement arm 624c, and the clutch pawls 570 and 590 are moved. The clutch 59 is disengaged from the clutch 59 to be in the disconnected state. As a result, driving force is no longer transmitted from the engine 3 to the winding bobbin 57, and the lifting operation is stopped. In this state, the weight receiving part 485a of the weight receiving tool 485 re-enters due to the restoring force of the spring 488, and the soil improving machine main body A slightly descends to this position due to its own weight, but does not descend from this point. It is blocked by the weight receiver 485, and the soil improving machine main body A is held at the stopped position. At the same time, the driven wheel 295 comes into contact with the cam body 64 and the valve rod 297 is pressed, and when the air pressure in the air tank 1 reaches a predetermined pressure, the engine 3 becomes idling. Therefore, the frame main body B is folded down and the pneumatic soil improvement machine is moved using the wheels 46 from the place where the fumes are produced in the soil to the next work place.

In addition, the compressed air in the air tank 1 is
The opening operation of step 1 causes the jet from the nozzle port 14a to become empty, and the internal passage of the sensing unloader 26 is closed. Valve mechanism 2
After the driven wheel 295 of No. 9 comes out of contact with the cam body 64, the sensing unloader 26 opens and closes, that is, the air pressure does not act on the unloader 31 regardless of the air pressure in the air tank 1, so the operation cannot be performed. The rod 31a of the unloader 31 remains retracted, no displacement occurs in the throttle rod 311, and the engine 3 maintains its high-speed rotation and high-output state in its pre-injection state.

On the other hand, as the internal passage of the sensing unloader 26 is closed, the rod 36a of the actuating unloader 36 is
It returns to the state before advancing, leaves the valve plate 713,
The compressor 7 operates in a steady state under the high speed rotation of the engine 3, and the air compressed by the compressor 7 is sequentially accumulated in the air tank 1 through the pipe 8. Even if the air pressure in the air tank 1 reaches a predetermined pressure while the soil improvement machine main body A is rising, the engine 3 maintains a high output state due to high speed rotation and prevents the engine from stalling. The extraction mechanism D is sufficiently operated to smoothly extract the pipe 12.

Thereafter, when the soil improving machine main body A is located in the ascending end region and the valve rod 297 of the valve mechanism 29 is in a pressed state, the air pressure in the air tank 1 reaches a predetermined pressure, or When the air pressure reaches a predetermined pressure, the soil improvement machine main body A is located in the rising end region, and the valve rod 297 of the valve mechanism 29 is pressed, the air pressure in the air tank 1 is detected by the sensing unloader 26 and the valve mechanism. The mechanism 29 acts on the operating unloader 31 to push up its rod 31a, lowering the throttle rod 311 and putting the engine 3 in an idling state. The rod 36a pushes the valve plate 713 to stop the compression operation of the compressor 7.

That is, in the above embodiment, the present invention provides a switching mechanism for position detection between the sensing unloader 26 and the operating unloader 31, so that when the soil improving machine main body A is located in the ascending end region with respect to the frame main body B, , the sensing unloader 26 and the operating unloader 31 are in communication regardless of the air pressure in the air tank 1, and the position other than the rising end region, that is, the automatic driving mechanism Aa or the automatic pulling mechanism D is in operation. In the position where the soil improving machine main body A is descending or ascending, the communication between the sensing unloader 26 and the operating unloader 31 is cut off regardless of the air pressure in the air tank 1, and the operating unloader 31 side is closed to the atmosphere. The operation unloader 31 pulls up the throttle rod 311 of the carburetor 300 with its internal spring to rotate the air tank 3 at high speed.

At this time, if the air pressure in the air tank 1 has reached a predetermined pressure, the operating unloader 36 operates to stop the compression function of the compressor 7, and if the air pressure in the air tank 1 is below the predetermined pressure, The compressor 7 enters a compressed state and accumulates air pressure in the air tank 1.

In other words, when the soil improvement machine main body A is at least outside the rising end region with respect to the frame main body B,
Even if the air pressure in the air tank 1 has reached the predetermined pressure (of course if the air pressure in the air tank 1 has not reached the predetermined pressure), the automatic control mechanism C will cause the engine 3 to rotate at high speed and be in a high output state. is automatically set to .

In the above embodiment, the position detection switching mechanism is configured to detect when the soil improvement machine main body A is located in the rising end region with respect to the frame main body B and when it is located in another region and switch the operation. However, a cam body similar to the cam body 64 is provided at a position corresponding to the descending end region on the rail side of the frame body B, and the soil improving machine body A is in the descending end region with respect to the frame body B, Even when the air pressure has accumulated to a predetermined set pressure, the automatic control mechanism C
The engine 3 may be configured to be automatically set to the idling state by the following.

Further, the driven wheel of the valve mechanism is connected to the guide rail 38.
Although the valve rod 297 is configured to be in rolling contact with the outer surface of the cam body 64, it may be configured in a non-contact manner, and further, the valve rod 297 may be configured to directly slide into contact with the cam body 64, etc.

Furthermore, a solenoid valve may be provided in place of the valve operating mechanism 29 of the above embodiment, and the valve rod and valve body may be used as a switch mechanism to switch the passage.

〔Effect of the invention〕

As explained above, according to the pneumatic soil improvement machine according to the present invention, the operations of driving in and pulling out the fumarole pipe can be easily performed with little effort, and the soil can be deeply cultivated easily. Since this pneumatic soil improvement machine was equipped with an automatic control mechanism,
This eliminates unnecessary high-speed rotation of the engine and improves fuel efficiency.

Further, the automatic control mechanism detects the air pressure in the air tank and determines that the pressure is below a predetermined pressure and that the soil improving machine body is at least at the rising edge of the rising edge region and the falling edge region with respect to the frame body. The engine is set to idle when located in this area, and the engine is automatically set to be kept at high speed in intermediate positions between the lowering end area and the lower end area, regardless of the air pressure in the air tank. When the soil clod in the field where plants are planted is hard and the automatic driving mechanism drives the pipe into the soil to a predetermined depth, or when the automatic pulling mechanism pulls out the pipe that has been driven into the soil. Even if it takes a long time for the air to accumulate in the air tank to a predetermined set pressure during driving or pulling out, the engine will not be able to reach the low output state of idling while the automatic driving or pulling mechanism is operating. Therefore, the pipe can be inserted or pulled out smoothly without causing the engine to stall.

Furthermore, before the automatic pipe driving mechanism starts driving, even if the air has accumulated to a predetermined set pressure in the air tank and the air tank is idling, the soil conditioner body begins to move downward relative to the frame body. The engine is automatically set to a high-output state with high-speed rotation, and the pipe is driven in smoothly, allowing for deep plowing work with high work efficiency.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the pneumatic soil improvement machine, Figure 2
The figure is a sectional view taken along the line X ₁ - X ₁ in Fig. 1, Fig. ₃ is a sectional view taken along _the line X 3 - Figure 5 is a rear view of the main parts of Figure 1, Figure 6 is a sectional view taken along the line _X4 - _X4 in Figure 5, Figures 7 and 8 are the main body of the soil improvement machine. is a side view and a plan view of the valve mechanism part showing a part of the frame body other than the rising end area in cross section,
Figure 9 is a configuration diagram of the carburetor part in the engine.
Figure 10 is a cross-sectional plan view taken along X ₂ - X ₂ in Figure 1;
Figure 11 is a cross-sectional side view of the fall prevention mechanism part,
FIG. 2 is a side view illustrating the operation in a state where the soil improvement machine body has reached the lower end region with respect to the frame body. A... Soil improvement machine body, Aa... Automatic driving mechanism,
B...Frame body, C...Automatic control mechanism, D...
...Automatic extraction mechanism, 1...Air tank, 1a...Joint, 1b...Mounting frame, 1c...Mounting seat, 1d
...Communication seat, 2...Mounting base, 3...Engine,
300... vaporizer, 310... vaporizer body, 31
1... Throttle rod, 311a... Tsubabe, 3
12... Mounting plate, 313... Nut, 314...
Swinging tool, 315...pin, 316...universal joint,
4... Reduction gear, 5... Drive shaft, 6... Drive pulley, 7... Compressor, 710... Cylinder, 711
...Packskin, 712...Seat plate, 712a...Intake port, 713...Valve plate, 714...Screw, 715
... Cylinder head, 715a ... Bulkhead, 716
... Suction chamber, 717 ... Discharge chamber, 718 ... Air filter, 719 ... Joint, 720 ... Safety valve,
721...Protector, 8...Pipe, 9...Operation valve, 910...Valve housing, 911...Valve body, 912
... Valve shaft, 913 ... Valve lever, 914 ... Short shaft, 915 ... Arm, 915a ... Long hole, 91
5b...Engagement hole, 916...Spring, 917
... Support shaft, 918 ... Pedal, 10 ... Inner pipe, 100 ... Flange, 101 ... Inner pipe body, 11 ... Stroke tube, 11a ... Cylindrical body, 11b ... Blowout prevention plate, 11c ... locking piece,
11d... Gear case, 110... Lid body, 12... Outer pipe, 120... Receiving body, 121... Outer pipe body, 13... Buffer body, 14... Nozzle,
14a... fumarole, 15... cylinder case, 16...
Input shaft, 17... Input pulley, 18, 19... Bevel gear, 20... Camshaft, 20a... Eccentric cam, 200... Ring, Δl... Eccentricity, 21...
...V-belt, 22...Tension mechanism, 23...
Transmission cover, 24... Elevating body, 240... Elevating frame, 241... Bolt, 242... Elevating shaft, 24
3...Roller, 25...Pedal guide, 26...
Sensing unloader, 26a... Rod, 26b...
Plug, 27...Tube, 28...Three-way joint, 2
9... Valve train mechanism, 290... Valve train body, 290a
...Exhaust port, 291...Mounting stay, 292
...Boltnut, 293...Rocking arm, 293a...
... Stopper, 294 ... Support shaft, 295 ... Driven wheel, 296 ... Pivot, 297 ... Valve lever, 30 ...
Communication tube, 31... Operation unloader, 31a
... Rod, 32 ... Extension tube, 33 ... Metal fitting, 34 ... Thin rod, 35 ... Locking tool, 36 ... Operation unloader, 36a ... Rod, 37 ... Relay tube, 38 ... Guide rail , 38a... passage, 38b... window hole, 39... handle, 40...
...stand, 41...horizontal frame, 42...ground frame, 4
3... Reinforcement plate, 44... Axle bearing, 45... Axle, 46... Single wheel, 47... Footrest, 48...
... Fall prevention mechanism, 480 ... Bracket, 481
... Pivot, 482 ... Lever, 483 ... Boss tool, 484 ... Regulating tool, 485 ... Weight receiving tool, 48
5a... Load receiving part, 485b... Oblique side part, 486...
...Protection tube, 487...Grip, 488...Spring, 489...Latching rod, 49...Band hook, 49a...Disc, 50...Stay, 51
... Guide rod, 52 ... Plywood, 53 ... Screw,
54...Reduction gear case, 54a...Mounting seat, 5
5... Harmonic drive type reduction mechanism, 56... Output shaft, 5
6a... Spline portion, 57... Winding bobbin, 5
70...Clutch pawl, 570a...Recessed angle engagement surface, 571...Sleeve, 58...Bearing,
59...Dog clutch, 590...Clutch pawl, 590a...Advanced engagement surface, 591...Surrounding groove, 60...Spring, 61...Boot, 62...Operating mechanism, 620...Support, 621... ...screw, 6
22... Linking tool, 622a... One end engaging part, 62
2b...middle cylinder part, 622c...other end engaging part, 6
23... Mounting shaft, 624... Operating tool, 624a...
...Shifter, 624b...Cylinder shaft part, 624c...Engagement arm, 624d...Mounting boss part, 625...
Pivot shaft, 626... Lock bolt, 627... Guide rod, 63... Hanging fixture, 64... Cam body, 67
a...Slope.

Claims (1)

[Claims] 1. An engine, a compressor driven by the engine, an air tank that stores air pressurized by the compressor, and an air tank that communicates with the air tank via an operating valve and is vertically disposed from the bottom of the air tank and has a jet at the tip. A soil improving machine main body is composed of a pipe having a mouth and an automatic driving mechanism that drives the pipe into the soil using the engine as a power source, and this main body, a frame main body that supports the main body so as to be movable up and down, and the above-mentioned An automatic extraction mechanism that pulls out a pipe driven into the soil while raising the soil improvement machine body relative to the frame body using the engine as a power source,
An automatic control mechanism is provided to automatically control the engine between an idling state and a high-speed rotation state, and this automatic control mechanism detects the air pressure in the air tank and controls when the pressure reaches a predetermined pressure and when it is lower than that. A pressure detection switching mechanism whose operation changes depending on the time is interposed between the soil improving machine main body and the frame main body, so that the soil improving machine main body can move between the ascending end region and the descending end region with respect to the frame main body. The soil improvement machine body is connected to the frame body and a position detection switching mechanism that switches the operation by detecting when the soil improvement machine is located in the rising end region and when it is located in other regions. However, at least when the engine is outside the rising edge region, the automatic control mechanism is configured to automatically set the engine to a high speed rotation state even if the air pressure in the air tank has reached a predetermined pressure. Features: Pneumatic soil improvement machine.