JPH0458288B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention involves driving a pipe having a fumarole at its tip into the soil, and then blowing out compressed air from the fumarole to create cracks in the deep layers of the soil, thereby cultivating the soil deeply. Pneumatic soil improvement that is easy to perform and supplies air, or oxygen, to the roots of plants such as trees and plants, promoting the activation of plants and improving the quality and yield of crops. It's about machines. [Prior Art] As this type of pneumatic soil conditioner, the present applicant has developed an engine, a compressor driven by the engine, as disclosed in Japanese Patent Laid-Open No. 58-98003, an air tank that stores air pressurized by the compressor; a pipe that is connected to the air tank via a valve mechanism and that hangs down from the bottom of the air tank and has a blowhole at its tip; and a pipe that is powered by the engine. An automatic driving mechanism for driving into the soil constitutes a soil improvement machine body, this body, a frame body that supports the body so as to be able to rise and fall, and a frame body that lifts the soil improvement body with respect to the frame body using the engine as a power source. The proposed method includes an automatic extraction mechanism that pulls out a pipe that has been driven into the soil while moving the pipe, and a foot petal that opens and closes the valve mechanism. [Problems to be Solved by the Invention] Such a pneumatic soil improvement machine uses an automatic driving mechanism to lower the soil improvement machine body along the frame body and drive the pipe into the soil. Once the soil is in place, the worker steps on a foot pedal to open the valve mechanism, and the compressed air stored in the air tank is ejected from the nozzle of the pipe, creating cracks in the soil and deepening the cultivation. Sometimes, the footpetal is stepped on and the air is injected before the compressed air in the air tank reaches the specified pressure, or before the pipe is driven to a sufficient depth. Air pressure was accumulated again and the fumarole was regenerated, reducing work efficiency.

[Means to solve the problem]

The present invention was conceived in view of the above circumstances, and is designed to automatically open a valve mechanism to emit air when the air in the air tank reaches a predetermined pressure and the pipe is inserted into the lowest position. It is an object of the present invention to provide a pneumatic soil improvement machine that enables the desired deep plowing work to be carried out reliably and efficiently. In order to achieve this object, the present invention is configured such that the valve mechanism is actuated by air pressure to communicate and cut off the air tank and the pipe, and the air tank is configured to detect the air pressure in the air tank and adjust the pressure to a predetermined level. A pressure detection switching mechanism is provided that switches the operation when the pressure is reached and when the pressure is below. A position detection switching mechanism is provided that detects when the air tank is located in the air tank and when the air tank is located in another area and switches its operation. The compressed air in the air tank is switched when the position detection switching mechanism detects that the automatic driving mechanism has detected that the soil conditioner body has reached the lower end area with respect to the frame body. The valve mechanism is opened by a part of the air tank, and the compressed air in the air tank is blown out through a pipe. [Example] Hereinafter, an example of the present invention will be described with reference to the drawings. In the figure, symbol A indicates the soil improvement 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 improvement machine main body A is configured 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. 7, 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 3a as shown in FIG. This carburetor 3a has a throttle rod 3c protruding from a main body 3b, and the throttle rod 3c is pulled downward by a spring (not shown) to be in an idling state, and has a flange 3d at its tip. This flange 3d has one end fixed by a nut 3e, and one end abuts a swinging tool 3h which is pivotably supported by a pin 3g to be vertically movable at the other end of a mounting plate 3f bent at right angles. A movable member 3i is provided at the other end of the swinging tool 3h. A drive pulley 6 is attached to the drive shaft 5 protruding from the reduction gear 4, as shown in FIG. As shown in FIGS. 1 and 9, the compressor 7 includes a cylinder 7a, a packing 7b, and a seat plate 7c.
The valve plate 7f, which is attached to the seat plate 7c with screws 7e, opens only toward the cylinder 7a to open and close the suction port 7g, and the cylinder head 7d is connected to the suction chamber 7i and the discharge chamber by a partition 7h. It is divided into 7j. The suction chamber 7i communicates with the atmosphere through an air filter 7k, the pipe 8 is connected to the discharge chamber 7j through a joint 7l, and the discharge chamber 7j
A safety distance of 7m has been established. A valve mechanism 9 operated by pneumatic pressure is provided at the bottom of the air tank 1, as shown in FIGS. 3 and 4. This valve mechanism includes an upper and lower passage 9b communicating with the air tank 1 in the valve housing 9a, left and right air chambers 9c and 9d communicating with the upper and lower passage 9b, and an oblique opening that communicates with a left air chamber 9c and an inner pipe 10, which will be described later. A passage 9e is formed. The left air chamber 9c accommodates a valve body 9f that opens and closes between the upper and lower passages 9b and the left air chamber 9c, and the right air chamber 9d is slidable in airtight contact with the air chamber 9d. A valve bushing 9g is provided, and these valve bodies 9f
Insert bolt 9h into valve bush 9g and secure with nuts 9i, 9i. Valve bushing 9g
A compression spring 9j is interposed between the valve body 9a and the valve body 9a, and normally holds the valve body 9f in a closed state. A tube 9k is connected to the air chamber 9d outside the valve bushing 9g, and when compressed air is supplied from the tube 9k, the valve bushing 9g is pushed against the elastic force of the compression spring 9j. The valve body 9f is opened, the vertical passage 9b and the diagonal passage 9e are communicated with each other, and the compressed air in the air tank 1 is sent out. In addition, the code 9l is the valve bushing 9g.
This is a brief hole designed to ensure smooth operation. 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 a valve mechanism 9.
This inner pipe 10 has an inner pipe body 10b.
The flange 10a fixed to the upper end of the valve housing 9
a, and a flange provided at the upper end of the stroke cylinder 11 is fitted to the bottom surface of this flange 10a, and is integrally connected to the valve housing 9a fixed to the air tank 1 and supported together with the stroke cylinder 11. ing. The stroke tube 11 has a cylindrical body 11a, and a flange-like blowout prevention plate 11b is formed at the lower end. Moreover, on one side of the upper part of the stroke cylinder 11,
A gear housing 11d constituting the automatic driving mechanism Aa is formed, and a lid 11e is fitted to the outer circumference of the stroke cylinder 11 facing the gear housing 11d. The upper part of the outer pipe body 12a 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.
This outer pipe 12 hangs down longer than the lower end of the inner pipe 10, and a sharp nozzle 14 is attached to its tip.
A plurality of blowholes 14a are opened in the circumferential direction slightly upwardly by the sharp point. 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. installed. Further, a bevel gear 18 is attached to the input shaft 16 in the gear housing 11d, and as shown in FIG. It is attached to one end of the camshaft 20. An eccentric cam 20a is provided at the other end of the camshaft 20.
The camshaft 20 is provided with an eccentricity of Δl from the axis thereof. The eccentric cam 20a and the receiver 12b provided at the upper end of the outer pipe 12 are rings that fit onto the circumferential surface of the eccentric cam 20a when the outer pipe 12 slides along the inner pipe 10 and approaches each other. 20b hits the receiver 12b with a predetermined stroke, and when the lower surface of the receiver 12b is in contact with the buffer 13, the eccentric cam 20a hits the receiver 1.
I've learned not to hit 2b. 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 improvement machine main body A further includes the following configuration. An elevating body 24 shown in FIGS. 5 and 7 is attached to the outside of the air tank 1. This elevating body 24 is attached to the elevating frame 24a by tightening bolts 24b to the mounting frame portion 1b. A lifting shaft 24c is provided which is combined in a shape, and a roller 24d is attached to each outer end of the lifting shaft 24c. The frame main body B is constructed as follows. As shown in FIGS. 1, 5, and 7, the guide rail 38 has a channel-shaped cross section (see FIG. 6), and the passage 3 of the guide rail 38
Each roller 24d 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 48b is inserted through a bracket 48a, and a lower end portion of a lever 48c is integrally provided with a boss tool 48d. 48e is provided. Further, a spring 48k is stretched between the lever 48c and a locking rod 48l protruding from the outside of the guide rail 38. A weight receiver 48f is provided at the lower part of the lever 48c so as to protrude into the guide rail 38 through the window hole 38b.
A weight receiving portion 48g for receiving the roller 24d is provided, and the lower surface of the weight receiving tool 48f forms an oblique side portion 48h. Horizontal frame 41 in the middle of lever 48c
The portion facing the is bent into a dogleg shape, and this bent portion is covered with a protective tube 48i. Further, a grip 48j is provided at the upper end of the lever 48c. The automatic control mechanism C consists of two systems, each divided into the soil improvement machine main body A side and the frame body B side, and one of the systems, the soil improvement machine main body A side, is configured as follows. There is. As shown in FIG. 7, 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 four-way joint 28 attached to the air tank 1 via the communication seat 1d.
The other opening is connected to a valve operating mechanism 29 as a switching mechanism for position detection via a communication tube 30.
It communicates via an extension tube 32 with an operating unloader 31 screwed onto the mounting frame 1b of the air tank 1. The operation unloader 31 is provided with a rod 31a that can move up and down, and a thin rod 33 attached to the rod 31a is inserted through the rod 34.
The lower end of is locked via a locking tool 35 on the lower side of the metal fitting 33. As shown in FIG. 8, the upper end of the narrow rod 34 is inserted into and supported by the universal joint 3i of the carburetor 3a 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 upper opening of the four-way joint 28, and this tube 37 communicates with an operating unloader 36 provided in the compressor 7 shown in FIG. 36 and tube 37
is protected by protector 7n. In addition, the operating unloader 36 includes a rod 3 operated by pneumatic pressure.
6a is provided, and the valve plate 7f is pressed and released to open and close the valve plate 7f. As shown in FIGS. 5 to 7, the valve mechanism 29 includes a valve body 29a provided with an exhaust port 29b that communicates with the outside, and the valve body 29a fixedly attached to the lifting frame 24a with bolts and nuts. It is fixed to the stay 29c with a bolt nut 29d, and the swing arm 29e is attached to the valve train body 29a with a support shaft 29f.
The rocking arm 29e has a stopper 29 at one end.
A driven wheel 29h is provided at the other end via a pivot 29i. Furthermore, the valve train body 29
In a, a valve rod 29j is moved forward and backward by a rocking arm 29e.
is provided, and as shown in FIG. 5, by pushing the valve rod 29j against a spring (not shown),
The valve body moves away from one valve seat and comes into contact with the other valve seat, establishing 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 29b. And, excuse 2
When 9j is protruding, the exhaust port 29b
The structure is configured such that conduction occurs between the communication tube 30 side and the extension tube 32 side, and conduction 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 29h.
9h is adapted to make contact or release from contact. In addition, the other system of automatic control mechanism C is
On the soil improvement machine main body A side, the valve mechanism 29
A valve train 65 having almost the same structure as the valve train 65 is fixed to the mounting stay 29c with a common bolt/nut 29d, and is installed in parallel with the valve train 29. Since they have the same configuration except that they do not have a configuration corresponding to the port 29b, the same reference numerals will be given and the explanation will be omitted. The opening communicates through the communication tube 66, and the valve train body 65a communicates with the extension tube 67.
It is connected to an air cylinder mechanism 68, which will be described later. Further, on the side of the frame body B of the automatic control mechanism C, a cam body 69 serving as a switching mechanism having a slope 69a at the upper end is provided in the lower end region of the guide rail 38 facing the driven wheel 65h of the valve mechanism 65. ing. Then, the valve mechanism 65 and the valve rod 65
The communication tube 66 and the extension tube 67 are cut off when the valve j protrudes, and when the valve rod 65j is pushed in, the two tubes 66 and 67 communicate with each other. In addition, two valve mechanisms 2
Reference numerals 9 and 65 indicate a cover 2 attached integrally or separately to the transmission cover 23 in the side view of FIG.
Covered by 3a. Further, 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, and the high pressure inside the air tank 1 is opened. It has the function of circulating a small portion of the air to the operating unloader 31, operating unloader 36, and air cylinder mechanism 68.It can be operated manually or automatically by holding the knob 26b at the bottom of the sensing unloader 26 and pulling the rod 26a. The operation test of the control mechanism C can be performed as necessary. 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 7i of the compressor 7 advances. , inlet 7
Push the valve plate 7f of g and hold it in the open state,
Even if the piston of the compressor 7 reciprocates, the air is not compressed, and the air tank 1
When the air pressure inside decreases, the rod 36a returns to its pre-advance position by a spring (not shown) in the actuating unloader 36 and separates from the valve plate 7f of the suction port 7g, causing the compressor 7 to operate normally. , high pressure air is forced to be fed from the cylinder 7a to the air tank 1 side. The operation unloader 31 is operated by a spring (not shown) installed inside the air tank 1 when the air pressure inside the air tank 1 reaches a predetermined pressure or higher, which is caused by the air pressure inside the air tank 1 provided via the sensing unloader 26 and the valve mechanism 29. When the rod 31a protrudes against the pressure (1) and the air pressure decreases, the rod 31a is operated by a spring to return to the position before protrusion and retreat. As the rod 31a, metal fitting 33, locking member 35, and narrow rod 34 rise, the throttle rod 3c of the carburetor 3a is pulled downward by the spring, and when the rod 31a returns and retreats,
Both the metal fitting 33 and the locking member 35 are pulled down, and the throttle rod 3c is pulled up. As shown in FIG. 2, the air cylinder mechanism 68 is supported by a support 62a attached to the mounting seat 54a of the reducer case 54 in the automatic extraction mechanism D, with one end communicating with the cylinder body 68a, and the other end communicating with the cylinder body 68a. A communication tube 70 whose end communicates with the relay tube 67, and a bypass tube 71 branched from the tube 70 and communicated with the air cylinder body 68a are provided, and the tube 9k of the valve mechanism 9 is communicated with the cylinder body 68a. I'm letting you do it.
Further, a rod 68b that extends and contracts with a piston protrudes from the air cylinder main body 68a, and a roller 68c is attached to the tip of this rod 68b. When compressed air at a predetermined pressure is sent from the relay tube 67, the rod 68b is first extended, and the bypass tube 71 is inserted into the cylinder body 68a near the extended end of the rod 68b.
and the tube 9k communicate with each other to operate the valve mechanism 9, and when compressed air is not supplied to the relay tube 67, the rod 68 is connected as shown in FIG.
b is contracted, and the tubes 71 and 9k are configured to be cut off. 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, a reduction gear case 54 is provided, and a harmonic drive type reduction mechanism 55 is provided in the reduction gear case 54. In this harmonic drive type 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 reduction gear case 54, and a rotation control circular spline is provided on the holding member integrated with the output shaft 56. A spline is attached, and a flex spline is interposed between the wave generator and the fixed side and rotating side circular splines. Further, the output shaft 56 is formed with a spline portion 65a, and this spline portion 56
A winding bobbin 57 is pivotally supported via a bearing 58 on the front side of the winding bobbin 57, and a recessed engagement surface 57b of a clutch pawl 57a provided on the winding bobbin 57 (see FIG. 5).
A dog clutch 59 having an advanced engagement surface 59b of a clutch pawl 59a that engages and disengages from the clutch pawl 59a and a circumferential groove 59c 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 57c. An actuation mechanism 62 for actuating the automatic extraction mechanism D
As shown in FIGS. 2 and 5, the support 62a
is attached to the mounting seat 54a of the reducer case 54 with screws 62b, and a shifter 62d for actuating an actuator 62c and the dock clutch 59 is pivotally supported on this support 62a via a pivot shaft 62e. The actuating tool 62c is provided with a cylindrical shaft portion 62f, and a locking bolt 62g is provided here.The tip of the locking bolt 62g is sharp, and the supporting tool 62a is fixed to this pointed portion to protrude. A leaf spring 62i having a diameter of 62h is in contact.
This plate spring 62i holds the dock clutch 59 in the clutch-on and clutch-off states by its protrusion 62h and lock bolt 62g when the operating member 62c and shifter 62d rotate. The roller 68c of the air cylinder mechanism 68 is exposed to the lower end of the actuating tool 62c, and when the rod 68b is extended, the actuating tool 62c
c is pushed up and rotated around the pivot shaft 62e, and the clutch of the automatic extraction mechanism D is engaged via the shifter 62d. Immediately after the clutch is engaged, the bypass tube 71 and the tube 9k are configured to communicate within the air cylinder main body 68a. The plywood 52 faces the upward trajectory of the operating tool 62c, and the soil improvement machine main body A
is the operating tool 6 at the rising end region relative to the frame body B.
2c so that the clutch can be disconnected. Note that the reference numeral 57d is a guide rod for the winding bobbin 57. The other end of the belt-shaped hanging tool 63, which has one end wrapped around the band hook 49 and secured with a rivet, passes through the upper side of the guide rod 51 and is fixed to the winding bobbin 57. It is wound in a spiral around the outer circumference of the . Next, the operation of the pneumatic soil conditioner of this embodiment will be explained. First, with the soil conditioner main body A held in a raised position relative to the frame main body B, the frame main body B is tilted, the single wheel 46 is brought into contact with the ground, and the pneumatic type Push the soil conditioner. 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 24d is supported by the weight receiving portion 48g of the weight receiving device 48f provided in the fall prevention mechanism 48 (see FIG. 10), and the lower side of the nozzle 14 of the outer pipe 12 is located slightly above the lower end of the grounding frame 42. The soil conditioner main body A is held by the frame main body B and does not descend, and the driven wheel 29h of the valve mechanism 29 is
As shown in FIG. 6, the valve rod 29j comes into contact with the cam body 64 and is pushed in, so that the tubes 30 and 32 are electrically connected. In the engine 3, when the air pressure in the air tank 1 does not reach a predetermined pressure, the internal passage of the sensing unloader 26 is closed, and the operating unloader 31 controls the throttle rod 3c of the carburetor 3a.
is pulled up and rotates at high speed, and when the air pressure in the air tank 1 reaches a predetermined pressure, the sensing unloader 26 is activated and the throttle rod 3 is pulled up and rotated at high speed.
c 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 57a and 59a are disengaged.
is retained. In this state, hold the grip 48j of the lever 48c and rotate the lever 48c against the spring 48k, so that the weight receiving part 4 of the weight receiving tool 48f is rotated.
When the support of the roller 24d by 8g is released, the soil conditioner main body A is lifted up by the frame main body B due to its own weight.
The lower end of the nozzle 14 touches the ground, and the weight of the soil improvement machine main body A acts on the outer pipe 12. The receiver 12b contacts the cam 20a, and the cam 20a
The entire weight of the soil improving machine main body A is applied to the receiving body 12b of the outer pipe 12 through. At the same time, the automatic driving mechanism Aa operates, and the cam 20a moves △
Since it is eccentric by l, the receiving body 12b is struck by the pressing force due to the rotation of the cam 20a, and the outer pipe 12 is driven into the soil while the soil improving machine main body A is lowered. At this time, the driven wheel 29h and the cam body 64 come out of contact, and the conduction between the tubes 30 and 32 is interrupted.
The tube 32 is connected to the exhaust port 29b, and the carburetor 3a is operated via the operation unloader 31.
Regardless of the air pressure in the air tank 1, the engine 3 rotates at high speed and produces high output. When the outer pipe 12 is driven to a predetermined depth and the soil conditioner main body A reaches its descending end region as shown in FIG. 66,
67 is in communication, and at this time, when the air pressure in the air tank 1 has reached a predetermined pressure and compressed air is being supplied to the tube 66 via the sensing unloader 26, tube 27, and four-way joint 28, air is supplied via the tube 67. The cylinder mechanism 68 is activated. In the air cylinder mechanism 68, the rod 68b first extends and the roller 68c comes into contact with the actuating tool 62c of the actuating mechanism 62 and pushes it, rotating the actuating tool 62c and the shifter 62d, so that the tip of the lock bolt 62g touches the leaf spring 6.
2i and is locked beyond the protrusion 62h of the shifter 62.
d, the dog clutch 59 moves toward the bobbin 57 against the spring 60, and the clutch pawls 57a and 59a
mesh together. Immediately after that, the tubes 71 and 9k communicate within the cylinder body 68a, pressurized air is supplied to the air chamber 9d of the valve mechanism 9, the valve bushing 9g is pressed against the spring 9j, and the valve body 9f opens. The high pressure air in the air tank 1 is passed through the upper and lower passages 9b and the air chamber 9.
c, it is ejected into the soil from the blowhole 14a of the nozzle 14 provided at the tip of the outer pipe 12 through the diagonal passage 9e. This fumarole causes cracks in the soil around the fumarole 14a to deepen the soil, and at the same time supplies oxygen to the plants. Immediately before this jet, the automatic extraction mechanism D starts operating, and the engine 3
While maintaining high speed rotation, the driving force is transmitted from the output shaft 56 to the take-up bobbin 57 via the dog clutch 59. A begins to rise relative to the frame body B, but as the soil improvement body A rises, the receiving body 12b moves towards the eccentric cam 20a.
The blowing action ends within a short period of time when the receiving body 12b is supported by the stroke cylinder 11 via the buffer body 13 at a further distance, and then the outer pipe 12 driven into the soil is pulled out. Furthermore, even if the driven wheels 65h of the cam body 69 contact and the tubes 66, 67 communicate with each other, if the compressed air in the air tank 1 has not reached a predetermined pressure, high-pressure air is sent from the sensing unloader 26 to the tubes 27, 66. is not supplied, the air cylinder mechanism 68 and the valve mechanism 9 do not operate, and when the compressed air in the air tank 1 reaches a predetermined pressure, the automatic extraction mechanism D operates for the first time to perform the blowing operation. In the soil conditioner main body A, the roller 24d is connected to the guide rail 3.
8, the posture at the time of rising is restricted, and the outer pipe 12 is pulled out vertically. In addition, as the hanging tool 63 is wound up on the winding bobbin 57, its diameter gradually increases, so the soil improvement machine main body A is slow at the beginning of its rise, but gradually rises faster as it rises, and for a short period of time. In addition, since the lifting speed is slow in the initial stage of pulling out, which requires the greatest force to pull out the outer pipe 12, 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, the soil conditioner main body A rises above the grounding frame 42, and the upper roller 24d pushes the oblique side 48h of the weight receiver 48f from below against the spring 48k. The weight receiver 48f is pulled out of the guide rail 38 and reaches above it. When the soil conditioner main body A rises to the upper limit, the abutment plate 52 and the operating tool 62c
collide with each other, and the actuating tool 62c rotates to the state shown in FIG.
9, and the clutch 59 is placed in the disconnected state. As a result, the engine 3 is attached to the winding bobbin 57.
The driving force is no longer transmitted, and the lifting operation is stopped. In this state, the weight receiver 48f
The weight receiving part 48g re-enters with the restoring force of the spring 48k, and the soil improvement main body A slightly descends to this position due to its own weight, but the weight receiving device 48f prevents it from descending from here, and the soil improvement machine The main body A is held at the stop position. At the same time, the driven wheel 29h comes into contact with the cam body 64 and the valve rod 29j is pressed.
When the air pressure in the air tank 1 reaches a predetermined pressure, the engine 3 enters an idling state. Therefore, the pneumatic soil conditioner is moved from the place where the air is blown into the soil to the next work place using the wheels 46 of the frame body B. In addition, the compressed air in the air tank 1 is
Due to the opening operation, the fumarole 14a is ejected and becomes empty, and the internal passage of the sensing unloader 26 is closed. After the driven wheel 29h of 29 and the cam body 64 come out of contact, the air pressure does not act on the opening/closing operation of the sensing unloader 26, that is, on the operating unloader 31 regardless of the air in the air tank 1. The rod 31a of the operation unloader 31 remains in the returned and retracted state, no displacement occurs in the throttle rod 3c, and the engine 3 maintains its high speed rotation and high output state in the state before the injection. 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 and separates from the valve plate 7f, and the compressor 7 enters steady operation under the high speed rotation of the engine 3, and the air compressed by the compressor 7 is passed through the pipe 8. Pressure is accumulated in the air tank 1 one after another. 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, prevents engine stalling, and automatically The extraction mechanism D is sufficiently operated to smoothly extract the pipe 12. After that, when the soil conditioner main body A is located in the rising end region and the valve rod 29j of the valve mechanism 29 is in a pressed state, and the air pressure in the air tank 1 reaches a predetermined pressure, or the air pressure in the air tank 1 reaches a predetermined pressure, the soil improvement machine main body A is located in the rising end region, and the valve lever 29j of the valve mechanism 29 is pressed, the air pressure in the air tank 1, the sensing unloader 26, and the valve mechanism 29 Via the actuated unloader 3
1, the rod 31a is pushed up,
When the throttle rod 3c is lowered and the engine 3 becomes idling, the air pressure in the air tank 1 also acts on the operating unloader 36 via the sensing unloader 26, and the rod 36a is connected to the valve plate 7.
Push f to stop the compression operation of the compressor 7. Note that in the above embodiment, the valve mechanism 29, 65
Although the driven wheels 29h and 65h are configured to move along the outer surface of the guide rail 38, they may also be in rolling contact with the guide rail. It may also be configured so that it slides into contact with. [Effects of the Invention] As explained above, according to the pneumatic soil conditioner according to the present invention, the valve mechanism provided between the air tank and the pipe provided with the blowhole is opened and closed by pneumatic pressure, and the air tank has a structure in which the valve mechanism is opened and closed by air pressure. , a pressure detection switching mechanism is provided that detects the air pressure in the air tank and switches the operation when the pressure reaches a predetermined pressure and when it is less than that, and the mechanism is installed between the soil improvement machine main body and the frame main body. is provided with a position detection switching mechanism that switches the operation by detecting when the soil improvement machine body is located at the lower end region relative to the frame body and when it is located in another region, and the pressure detection switching mechanism detects that the air pressure in the air tank has reached a predetermined pressure and switches, and the position detection switching mechanism detects that the soil conditioner body has reached the lower end area with respect to the frame body due to the automatic driving mechanism. When the switch is detected and switched, a part of the compressed air in the air tank opens the valve mechanism, and the compressed air in the air tank is blown out through the pipe. At the same time, the air pressure is the highest and the desired deep plowing work can be carried out reliably and efficiently. In addition, the work of driving the soil improvement machine into the soil,
Since the fumarole work and the pulling work from the soil are all done automatically, the work can be done uniformly no matter who is using it, improving usability.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the pneumatic soil conditioner, 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 - Rear view of main parts in Figure 1, No. 6
The figure is a sectional view taken along the line X ₆ - X ₆ of Figure 5, and Figure 7 is
Figure 5 is a sectional view taken along the line _X5 - _X5 , Figure 8 is a configuration diagram of the carburetor part in the engine, and Figure 9 is the
Figure 10 is a cross-sectional side view of the fall prevention mechanism part, Figure 11 is an explanatory diagram of the structure of the present invention, and Figure 12 is a cross-sectional plan view taken along X ₂ - X ₂ of the figure. FIG. 3 is a side view illustrating the operation in a state where the lower end region has been reached. A... Soil improvement machine main 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,
3a... vaporizer, 3b... vaporizer body, 3c...
Throttle rod, 3d...flange, 3e...nut, 3f...mounting plate, 3g...pin, 3h...swinging tool, 3i...universal joint, 4...reducer, 5...
Drive shaft, 6... Drive pulley, 7... Compressor, 7a
...Cylinder, 7b...Packskin, 7c...Seat plate, 7d...Cylinder head, 7e...Screw, 7
f... Valve plate, 7g... Suction port, 7h... Bulkhead, 7
i...Suction chamber, 7j...Discharge chamber, 7k...Air filter, 7l...Joint, 7m...Safety valve, 7n...
...Protector, 8...Pipe, 9...Valve mechanism, 9
a... Valve housing, 9b... Upper and lower passages, 9c, 9d...
Air chamber, 9e...diagonal passage, 9f...valve body, 9g
...Valve bush, 9h...Bolt, 9j...Nut, 9j...Compression spring, 9k...Tube, 9
l...Brief hole, 10...Inner pipe, 10
a...Flange, 10b...Inner pipe body, 1
1... Stroke cylinder, 11a... Cylindrical body, 11b...
...Blowout prevention plate, 11d...Gear case, 11e...Lid body, 12...Out pipe, 12a...Outer pipe body, 12b...Receiver body, 13...Buffer body, 1
4... Nozzle, 14a... Blower port, 15... Cylinder case, 16... Input shaft, 17... Input pulley, 1
8, 19...Bevel gear, 20...Camshaft, 20
a...Eccentric cam, 20b...Ring, △l...Eccentricity, 21...V belt, 22...Tension mechanism, 23...Transmission cover, 24...Elevating body, 24
a... Lifting frame, 24b... Bolt, 24c... Lifting shaft, 24d... Roller, 26... Sensing unloader, 26a... Rod, 26b... Knob, 27,
70...tube, 28...four-way joint, 29,6
5... Valve train mechanism, 29a, 65a... Valve train body,
29b...Exhaust port, 29c...Mounting stay,
29d... Bolt nut, 29e, 65e... Rocking arm, 29f, 65f... Support shaft, 29g, 65g...
...stopper, 29h, 65h...driven wheel, 29
i, 65i...axis, 29j, 65j...valve lever,
30, 66... Communication tube, 31... Operation unloader, 31a... Rod, 32, 67... Extension tube, 33... Metal fitting, 34... Thin rod, 35...
Locking tool, 36... Operating unloader, 36a... Rod, 37... Relay tube, 38... Guide rail, 38a... Passage, 38b... Window hole, 39...
...Handle, 40...Stand, 41...Horizontal frame,
42... Grounding frame, 43... Reinforcement plate, 44... Axle bearing, 45... Axle, 46... Single wheel, 47...
... Footrest, 48 ... Fall prevention mechanism, 48a ... Bracket, 48b ... Pivot, 48c ... Lever,
48d... Boss tool, 48e... Regulating tool, 48f...
...Weight receiver, 48f...Weight receiver, 48h...Hytenuse part, 48i...Protection tube, 48j...Grip,
48k...spring, 48l...locking rod, 49
...Band hook, 49a...Disc, 50...
Stay, 51... Guide rod, 52... Collision plate, 5
3... Screw, 54... Reducer case, 54a...
Mounting seat, 55... Harmonic drive type reduction mechanism, 56...
...output shaft, 56a...spline section, 57...take-up bobbin, 57a...clutch pawl, 57b...recessed engagement surface, 57c...sleeve, 57d...guide rod, 58...bearing, 59... ...Dock clutch, 59a...Clutch pawl, 59b...Advanced engagement surface, 59c...Surrounding groove, 60...Spring, 6
1... Boot, 62... Actuation mechanism, 62a... Support tool, 62b... Screw, 62c... Actuation tool, 62
d...Shifter, 62e...Pivot shaft, 62f...Cylinder shaft portion, 62g...Lock bolt, 62h...Protrusion, 62i...Plate spring, 63...Hanging tool, 64,
69...Cam body, 64a, 69a...Slope, 68
...Air cylinder mechanism, 68a...Cylinder body, 68b...Rod, 68c...Roller, 71
...Bypass tube.

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 a valve mechanism and is vertically disposed from the bottom of the air tank. The main body of the soil improvement machine is composed of a pipe having a blowhole at its tip, and an automatic driving mechanism for driving the pipe into the soil using the engine as a power source, and supports the main body so that it can be raised and lowered. and 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, the valve mechanism comprising: It is configured to operate using air pressure to connect and cut off the air tank and the pipe, and the air tank has a mechanism that detects the air pressure inside the air tank and switches off operation when the pressure reaches a predetermined pressure or when it is less than that. A switching mechanism is provided between the soil improvement machine body and the frame body to detect when the soil improvement machine body is located at the lower end region relative to the frame body and when it is located at another region. A position detection switching mechanism is interposed which switches the operation when the pressure detection switching mechanism detects that the air pressure in the air tank reaches a predetermined pressure and enters a switching state, and the position detection switching mechanism switches its operation. When the automatic driving mechanism detects that the soil improvement machine body has reached the lower end area with respect to the frame body, the valve mechanism is opened by a portion of the compressed air in the air tank, and the compressed air in the air tank is transferred to the pipe. A pneumatic soil improvement machine characterized by being configured to emit fumarole through.