JPH0325521Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is attached to the rear of a self-propelled vehicle such as a tractor, and during the process of being towed, compressed air is blown into the deep layer of the soil, causing cracks. This invention relates to a self-propelled pneumatic soil improvement machine that improves soil by expanding and softening the soil.

[Conventional technology]

As this type of self-propelled pneumatic soil improvement machine, as described in, for example, Japanese Utility Model Application Publication No. 125201/1982 and Publication No. 29102/1989, a three-point support link mechanism is installed at the rear of the tractor. A soil conditioner equipped with a soil improver that can be moved up and down has been proposed.

This soil improvement machine has a vertical fumarole blade that protrudes long from the bottom of the fuselage frame.The vertical fumarole blade plunges deep into the soil and directs compressed air forward and upward from the jet nozzle provided at its lower end. It is configured to eject water. In this type of self-propelled pneumatic soil improvement machine that has a vertical jet blade that protrudes long downward from the machine body, the vertical blade In order to prevent the lower end of the blade from colliding with uneven ground surfaces or ridges, it is necessary to change the attitude of the soil improver relative to the tractor and raise the lower end of the vertical blower blade to a high ground clearance of approximately 50 to 60 cm.

Conventionally, as a means to raise the ground clearance of a working machine that is attached to the rear of a tractor or the like via a three-point support link mechanism, for example, a three-point support mechanism is used as described in Japanese Patent Application Laid-Open No. 103305/1983. It is known that the top link of the support link mechanism is configured with a telescoping hydraulic cylinder.

In addition, when a work machine attached to the rear of a tractor, etc. via a three-point support link mechanism is lifted to a raised position, a top link is connected to the work machine side as a means of changing the attitude of the work machine to a forward leaning position. A configuration in which the connecting point of the ?

[The problem that the idea aims to solve]

By the way, as a means to raise the above-mentioned self-propelled pneumatic soil improvement machine to a high ground height, for example, as described in the above-mentioned prior art (Japanese Patent Application Laid-open No. 103305/1982), the top link is replaced with a telescopic hydraulic cylinder. When configured with , there is a problem that the top link configuration is complicated.

In this respect, a type in which the posture of the working machine is changed by sliding the connection point of the top link has an advantage in that the structure of the top link does not become complicated.

In this case, the above-mentioned prior art (Utility Model Application No. 47-37501
The design purpose of the device described in the above publication is different, and the guide slit for moving the connection point is formed horizontally along the direction of movement, so when the work equipment is lifted to the raised position, the top link connection is difficult. Even if the point moves backward and the work equipment is tilted forward, the change in position is slight and the lower end of the work equipment cannot be raised significantly, and when the work equipment is lowered, As the connection point of the top link moves forward and the top link tilts downward at a steep angle, the downward stroke of the work equipment is restricted and the lower end of the work equipment cannot be lowered deeply to the required depth of the soil. It was hot.

The present invention is of the type in which the connection point of the top link is moved, and when the work equipment is lowered to the lowered position, the lower end of the vertical blower blade can be lowered deeply to the required depth of the soil, just like a normal one. Another object of the present invention is to provide a self-propelled pneumatic soil improving machine that can reliably and greatly change the posture of the working machine to a forward-leaning position when lifting it up to a raised position, and that can raise the lower end of the vertical blower blade to a high ground height. do.

[Means to solve the problem]

In order to achieve this objective, the self-propelled pneumatic soil improvement machine according to the present invention includes: (A) a self-propelled soil improver that is equipped with a vertical fumarole blade protruding downward from the rear of the self-propelled vehicle to eject compressed air into the deep layer of the soil; (B) The improved machine is mounted so that it can be raised and lowered via a three-point support link mechanism consisting of a pair of left and right lower links and one top link, (B) 3 at the rear of the self-propelled vehicle. (C) On the other hand, the top mast on the soil improvement machine side to which the top link is connected is provided with a stopper that stops the lifting operation on the way to the rising end of the top link of the point support link mechanism. (D) At the top of the slit, when the soil conditioner is lowered, a top is formed. It is characterized by being provided with a locking recess into which a connecting pin of the link is locked.

[Effect]

In such a configuration, when the soil conditioner is in a lowered working state, the connecting pin of the top link is locked at the upper position of the slit formed diagonally in the vertical direction via the locking recess. In particular, the lower end of the fume vertical blade is maintained in a state where it enters and advances to the required deep layer of soil with a downward stroke similar to that of one installed via a conventional three-point support link mechanism.

When raising the soil improver, the top link is stopped by a stopper on the way to the rising end, and the soil improver is raised via the lower link while the top link stops rising. Due to the upward movement, the soil conditioner is rotated so as to tilt forward using the pivot end of the lower link as a fulcrum, and the rotational force allows the connecting pin of the top link to be more securely moved than the locking recess. When it is released, it will surely slide inside the slit toward its lower position.

As a result, in the ascending position, the soil improvement machine reliably and significantly changes its posture to a forward-leaning posture, and this change in posture causes the lower end of the vertical fumarole blade to rise above the ground surface, increasing the ground clearance. This eliminates the problem of the lower end of the vertical blade coming into contact with ridges, irregularities on the ground, etc. when moving around the field or turning around on the headland.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a well-known riding tractor (self-propelled vehicle), and the rear of this tractor 1 has a conventionally well-known three-point support link consisting of one top link 2 and a pair of left and right lower links 3. A mechanism 4 is provided, and a soil conditioner 5 is mounted via this three-point support link mechanism 4 so as to be able to move up and down.

The soil improvement machine 5 includes a hollow main body frame 6 extending in the left-right direction, a top mast 7 connected to the top link 2, and a lower link pin 8 connected to the lower link 3. At the rear of the main body frame 6 at the rear position, a mounting base 9 extends rearward, and a compressor 10 and a main tank 11 are mounted front and rear on this mounting base. Input shaft 10 of the compressor 10
a projects forward, and power is transmitted to this input shaft 10a from the PTO shaft 1a of the tractor 1 via a power transmission system 12 consisting of a universal joint and a propeller shaft having a spline expansion mechanism in the middle. I have to. Compressed air compressed by the compressor 10 is stored in a main tank 11 via a communication pipe 13.

A pair of vertical jet blades 14 (only one is shown in the drawing) hanging downward is attached to the left and right end portions of the main body frame 6. A fumarole 15 is attached. The vertical blow blade 14 is slightly inclined so that its lower end is located slightly forward of the upper base side when viewed from the side, and has a blade edge 14a attached to its front edge and an air supply pipe 16 attached to its back. There is. The fumarole 15 is provided with a sharp-pointed nozzle portion 17 having an arrow-point tip on the front side, and a fume hole 18 is opened upward in the nozzle portion 17.
Then, the compressed air from the air supply pipe 16 is transferred to the fumarole 1
5 to the nozzle part 17, and the blowhole 1
It is designed to be ejected upward from 8. The upper end of the air supply pipe 16 is communicated via a solenoid valve 19 with sub-tanks 20 provided on both sides of the base end of the vertical jet blade 14 . Solenoid valve 19
The valve 19 is opened and closed by a switch mechanism (not shown) in a switch box 19a provided at the rear of the compressor 10, and the opening and closing timing of this valve 19 can be adjusted as appropriate. Also, a communication pipe 2 is connected between the main tank 11 and the sub tank 20.
1, and when the solenoid valve 19 is opened and the compressed air stored in the sub-tank 20 is blown out from the blowhole 18, the compressed air immediately flows from the main tank 11 to the sub-tank 20 via the communication pipe 21. It is constructed so that the filling pressure is accumulated. A coulter 23 is supported on the front side of the vertical fumarole blade 14 via a support arm 22 extending forward from the main body frame 6, and this coulter 23 cuts the soil surface on the front side where the vertical fumarole blade 14 moves to a predetermined depth. I'm trying to keep going.

The top mast 7 has the top link 2.
The top mast 7 has a slit 24 formed diagonally rearward and downward so as to move away from the rear of the tractor 1 from the upper position to the lower position. Two slits 24 are formed in parallel, and the connecting pin 2a can be selectively supported in either of these two slits 24.

Further, at an upper position of the slit 24, there is a locking recess 24 in which the connecting pin 2a of the top link 2 is locked when the soil conditioner 5 is in a lowered working state.
a is formed.

Furthermore, at the rear of the tractor 1, a stopper 25 is provided which abuts against the top link 2 in a region halfway up to its rising end during the range of the lifting and lowering movement of the top link 2, thereby stopping the lifting and lowering movement. The other lower link 3 is lifted and lowered in the entire range from the lower end to the upper end by a hydraulic lift mechanism provided in the tractor 1, and during the upward movement, the top link 2 collides with the stopper 25 and stops rising. During this period, the soil improvement machine 5 continues to move upward, and as a result, the soil improvement machine 5 receives rotational force so as to rotate forward about the lower link pin 8 (the pivot end of the lower link 3). This rotational force causes the connecting pin 2a of the top link 2 to disengage from the locking recess 24a and slide within the slit 24 toward the lower position.

Note that the tractor 1 may be constructed of other types of self-propelled vehicles.

Next, the operation of the above embodiment will be explained.

The soil improver 5 is attached to the rear of the tractor 1 via a three-point support linkage 4, and is attached to the rear of the tractor 1.
Power is received from the PTO shaft 1a to the input shaft 10a of the compressor 10 via the power transmission system 12.

In the working state when the soil conditioner 5 is lowered, the first
As shown in the figure, since the connecting pin 2a of the top link 2 is locked in the locking recess 24a formed at the upper part of the slit 24, the vertical jet blade 14 is installed in the same state as a normal one. is plunged into the required deep layer of soil and maintained in a progressing state.

When moving the tractor 1 around a working field or when moving the tractor 1 around a headland, the soil improvement machine 5 is raised via the three-point support linkage mechanism 4 by a hydraulic lift mechanism provided in the tractor 1.

In the ascending stroke of the soil improving machine 5, when the soil improving machine 5 is elevated to the position shown in FIG. 2, the top link 2 collides with the stopper 25 on the way to the rising end, and the ascending is stopped. Even after the top link 2 stops rising, the soil improving machine 5 continues to move upward via the lower link 3, and as a result, the soil improving machine 5 uses the pivot end of the lower link 3 (lower link pin 8) as a fulcrum. By receiving the rotational force, the connecting pin 2a of the top link 2 is disengaged from the locking recess 24a and slides inside the slit 24 toward the lower position, and due to this movement, As shown in FIG. 3, the soil conditioner 5 is changed to a largely forward-leaning position.

As a result, in the ascending position, the soil conditioner 5 is significantly tilted forward, and the vertical fumarole blade 14
The center of gravity of the soil improvement machine 5 is moved forward as the lower end is raised higher than the ground surface and the heavy compressor 10, main tank 11, and other compressed air supply sources are moved to the front. The compressed air fume 15 of the fume vertical blade 14 and the nozzle part 17 are held
The lower end is located above the ground by more than 50 to 60 cm,
When moving over a ridge or in a field where the field is highly uneven, these items do not collide with the ridge or the ground, thereby preventing bending and damage.

To move on to the fume work again, the soil improver 5 is lowered from the state shown in FIG. The center of gravity of the machine shifts to the rear, and its own weight causes soil improvement machine 5 to shift to the rear.
receives a rotational force in the opposite direction to the rear using the lower link pin 8 as a fulcrum, and due to the rotational force, the connecting pin 2a of the top link 2 sequentially slides from the lower position of the slit 24 to the upper position side, and the second In the state shown in the figure, the connecting pin 2a engages with the locking recess 24a formed at the upper part of the slit 24. The soil improver 5 is connected to the soil improver 5 via the three-point support linkage
By lowering the soil conditioner 5 further and towing it with the tractor 1, the soil conditioner 5 moves forward with its own weight, causing the vertical jet blades 14 to plunge from the ground into a required depth, as shown in FIG.

In addition, in the forward process, the switch box 19a
By operating the switch, the solenoid valve 19 is opened at predetermined timing intervals, and the compressed air stored in the sub-tank 20 is vigorously jetted upward from the blowhole 18 through the air supply pipe 16 and the nozzle section 17. . This ejection of high-pressure air causes cracks in the deep soil above fumarole 18.
While the aircraft is moving, compressed air jets are sequentially emitted at predetermined timing intervals, so that crack regions are continuously formed and the soil expands and softens.

[Effect of idea]

Since the present invention has the configuration described above, the following effects can be obtained.

(1) When the soil conditioner is in a lowered working state, the connecting pin 2a of the top link 2 is locked in the upper position of the slit 24 formed diagonally in the vertical direction via the locking recess 24a. As a result, the lower end of the vertical fumarole blade 14 penetrates into the required deep layer of the soil with a downward stroke similar to that installed via a normal three-point support link mechanism,
It is maintained in a state where it is being advanced, allowing the fume work to be carried out smoothly.

(2) When the soil conditioner is raised, the top link 2 is stopped by the stopper 25 on the way to the rising end during the rising process.
By lifting the soil improver via the lower link 3 while the top link 2 has stopped lifting, the soil improver rotates to tilt forward using the pivot end of the lower link 3 as a fulcrum. Due to the rotation imparting force, the connecting pin 2a of the top link is reliably disengaged from the locking recess 24a and can reliably slide within the slit 24 toward its lower position.

(3) As a result, in the raised position, the soil conditioner is reliably and largely tilted forward,
Due to this attitude change, the lower end of the vertical fumarole blade is raised above the ground surface, increasing the ground clearance.
The problem of the lower end of the vertical fumarole blade coming into contact with ridges, unevenness of the ground, etc. when moving in the field or turning around on the headland does not occur, and bending and damage of the vertical fumarole blade can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, and FIGS. 2 and 3 are diagrams illustrating its operation. 1...Tractor (self-propelled vehicle), 1a...PTO
Shaft, 2... Top link, 2a... Connection pin, 3
...Lower link, 4...Three-point support link mechanism, 5
...Soil conditioner, 6...Main frame, 7...Top mast, 8...Lower link pin, 9...Mounting stand, 10...Compressor, 10a...Input shaft, 11...
...Main tank, 12...Power transmission system, 13,2
1...Communication pipe, 14...Fume vertical blade, 14a...
... Blade edge, 15 ... Compressed air fumarole, 16 ... Air supply pipe, 17 ... Nozzle part, 18 ... Fumarole, 19
... Solenoid valve, 19a ... Switch box, 20 ... Sub tank, 22 ... Support arm, 23 ... Coulter, 24 ... Slit, 24
a...Latching recess, 25...Stopper.

Claims (1)

[Scope of Claim for Utility Model Registration] A soil improver is installed at the rear of a self-propelled vehicle and has a vertical blower blade that projects downward from the vehicle body to eject compressed air into the deep soil. The top link of the three-point support link mechanism is attached to the rear of the above-mentioned self-propelled vehicle so that it can be raised and lowered via a three-point support link mechanism consisting of a link, and the top link of the three-point support link mechanism performs a rising operation on the way to the rising end. On the other hand, the top mast on the soil conditioner side to which the top link is connected is provided with a hole that is diagonally directed upward and downward so as to move away from the rear of the self-propelled vehicle as it goes from its upper position to its lower position. The invention is characterized in that a locking recess is provided in the upper position of the slit, into which a connecting pin of the top link is locked when the soil conditioner is in a lowered working state. Driving air soil improvement machine.