JPH0228713Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a nozzle wheel with liquid injection nozzles protruding radially from the boss part, which is mounted on the machine body so that the tip of the liquid injection nozzle sticks into the soil and rotates. Regarding improvements to soil injection machines.

As shown in FIG. 1, the soil injection machine of the above-mentioned form is usually mounted on the rear of a hand tractor-like body a on which an engine 10 is mounted and running wheels 11 driven by the engine 10 are mounted on the shaft. , a mounting machine frame b is connected so as to extend rearward, a chemical tank T and a ruler wheel 2 are supported on the mounting machine frame b, and a plurality of spike-shaped liquid injection nozzles 30 are connected to the boss part. The nozzle wheel 3 protrudes radially in a spoke-like manner from 32, and among the plurality of liquid injection nozzles 30 forming the radial shape, the tip of the liquid injection nozzle 30 positioned so as to protrude downward pierces into the soil. The above-mentioned chemical liquid The chemical liquid tank T is connected to the liquid injection nozzle 30, which is formed into a liquid conduit that communicates with the tank T through the hose 40 and the pump device P, and whose fitting portion with the boss portion 32 protrudes downward. It is formed into a rotary valve that sequentially communicates with the machine body A and the running wheel 1.
1, the nozzle car 3 rotates, and its liquid injection nozzles 30 sequentially alternate and pierce into the soil, and at the same time, the liquid injection nozzles 30 pierced are communicated with the pump device P. hand,
A chemical solution or liquid fertilizer is sprayed from a spout 30a at the tip.

As described above, this type of soil injection machine has a rotary valve type valve mechanism at the fitting portion between the support shaft 4 of the nozzle wheel 3 and the boss portion 32 of the nozzle wheel 3. The chemical solution or liquid fertilizer leaks into the liquid injection nozzle 30 that is closed along the fitting surface, and the liquid injection nozzle 30 is stuck into the soil.
There was a problem in that the chemical solution or liquid fertilizer was also sprayed from other injection nozzles 30.

For example, as described in Japanese Patent Publication No. 55-44574, a valve mechanism for controlling the supply of chemical liquid to the liquid injection nozzles that protrudes radially from the boss part of the nozzle car is installed in each nozzle car. This problem can be solved by providing each liquid nozzle separately, but in order to do this, it is necessary to use the fitting surface between the boss part of the nozzle wheel and its support shaft. Apart from the rotary valve having a simple mechanism, a complicated mechanism is now required, and another problem arises that increases the cost.

For this reason, as a means to prevent the ejection of chemical liquid from injection nozzles other than the injection nozzle that is stuck into the soil, while adopting the form of a rotary valve that simplifies the mechanism, the system shown in Fig. 2 is proposed. A soil injection machine has been developed. That is, an annular constricted portion 43 is provided in the portion of the above-mentioned support shaft 4 adjacent to the portion constituting the rotary valve, and a drainage passage 44 communicating with the constricted portion 43 is connected to the support shaft 4 through the interior of the support shaft 4. 4 toward the other end of the shaft 4, and collects the chemical solution leaking onto the fitting surface of the support shaft 4 and the boss portion 32 into the constricted portion 43, and drains it from there into the liquid drainage passage 44.
The liquid is led to the drainage hose 45 through the liquid injection hose 45 and returned to the chemical tank T, and the liquid injection nozzle 3 is not pierced into the soil.
This is to prevent the chemical liquid from being pumped to...

However, this means has a complicated structure and does not completely prevent leakage injection for the following reasons.

If the fitting part between the support shaft 4 and the boss part 32 is not precisely machined, the chemical solution leaking into the fitting part will not flow into the constriction part 43, and it may stick into the soil. No injection nozzle 30
The chemical solution will still be pumped to...

In order to ensure that the chemical liquid that leaks into the fitting part between the support shaft 4 and the boss part 32 returns to the chemical liquid tank T, the amount of the supplied chemical liquid that returns to the chemical liquid tank T is reduced by loosening the fitting of the fitting part. There are many injection nozzles 3 stuck in the soil.
0 becomes insufficient, the pressure of the chemical solution supplied to the injection nozzle 30 is insufficient, and the nozzle 3
Injection from 0a becomes uncertain.

In order to reduce the amount of the supplied chemical liquid that returns to the chemical liquid tank T via the constriction part 43,
If the fitting of the fitting portion is made too tight, the flow of the chemical liquid to the constricted portion 43 becomes uncertain, which not only causes a situation where the pressure of the chemical liquid is applied to the liquid injection nozzle 30 that is not pierced, but also causes a situation where the pressure of the chemical liquid is applied to the nozzle wheel 3. The rotation becomes heavy, making it impossible to spray chemicals and liquid fertilizer accurately.

The present invention was devised to solve these problems occurring in conventional means, and utilizes the fitting surface between the boss portion of the nozzle wheel and its support shaft to simplify the valve mechanism. To provide a new means for reliably preventing the leakage of chemical liquid, etc. from the spout of a liquid injection nozzle which is not pierced into the soil during work, while having the form of a rotary valve. With the goal.

In the present invention, as a means to achieve the above-mentioned object, a nozzle car with a plurality of liquid injection nozzles protruding radially from a boss part is fixed to a support body that is movable by running wheels. On the axis
In a soil injection machine that is supported by a loose fitting shaft so that the tip side of the injection nozzle sticks into the soil and rotates when the machine runs, the injection liquid injection machine is installed radially within the boss part of the nozzle car. A valve body that slides freely forward and backward with respect to the base end of each liquid injection nozzle is assembled between each base end of the nozzle and a fitting surface of a support shaft that slides in contact with the inner circumferential surface of the boss part. the valve body is pushed out toward the fitting surface of the spindle by a coil spring, and the fitting surface of the spindle is provided with a notch on the lower surface side thereof to allow the valve body to be pushed out by the coil spring; The valve body is provided with a valve that presses against the valve seat provided at the base end of the liquid injection nozzle by being pushed against the bias of the coil spring due to collision with the fitting surface of the support shaft. This invention proposes a soil pouring machine in which an opening of a liquid guiding pipe provided therein is formed in the above-mentioned notch of the support shaft.

Next, embodiments of the present invention will be described in detail. Note that the same reference numerals in the drawings are used for components having the same effect as in the conventional one.

Figures 3 and 4 show a floating wheel type soil injection machine implementing the present invention.

The main parts of the soil injection machine are as shown in Figure 5.
The nozzle wheel 3 is freely fitted to the support shaft 4, and the base end 31 of each liquid injection nozzle 30 is provided with a valve mechanism c for opening and closing.

This valve mechanism c is activated when the nozzle car 3 is lowered into the field and stuck into the soil as shown in FIG. It is designed to open and close.

In addition, as shown in FIG. 8, the present invention is also applicable to a drive wheel type soil pouring machine. This device has a gear 6 for forced drive attached to the nozzle wheel 3, but the main parts are the same as the above-mentioned idler wheel type soil injection device.

Below, an embodiment of the present invention will be described in detail using a floating wheel type soil pouring machine.

As shown in FIG. 5, the boss portion 32 of the nozzle wheel 3
Each liquid injection nozzle 3 is provided on the lower surface side of the part of the support shaft 4 that loosely supports the inner peripheral surface of the boss portion 32.
The outer end surface of the head 51 of the valve body 5 provided to freely slide in the axial direction of the liquid injection nozzle 30 within the boss portion 32 between the base end 31 of the valve body 30 and the fitting surface of the support shaft 4. A notch 41 having a width d1 is formed, which faces the opening 42a of the liquid guiding pipe 42 and the notch 41. As shown in FIG. 6, this notch 41 has a substantially half-moon cross section, and the valve body 5 is located in the center of the horizontal surface 41a.
The outer end surface 51a of the head 51 and the opening 42a of the liquid guide pipe 42 are facing.

The valve body 5 is provided between each base end portion 31 of the liquid injection nozzle 30 that protrudes radially from the outer periphery of the boss portion 32 of the nozzle car 3 in a spoke-like manner and the fitting surface of the support shaft 4 .

That is, the valve body 5 is a cylinder whose end facing the outer circumferential surface, which is the fitting surface of the support shaft 4 that fits into the inner circumferential surface of the boss portion 32, is closed by a head 51 in the form of a blind plug. body 5
2, a through hole 53 that communicates the inside and outside of the cylindrical body 52 is opened in the neck part following the head 51 of the cylindrical body 52,
The neck between the through hole 53 and the head 51 is a stepped portion 54.
The stepped portion 54 has an O-ring shaped valve 5.
5 is fitted. And the cylindrical body 52 of the valve body 5
The body portion formed in the base end tube portion 30b of the liquid injection nozzle 30 is slidably fitted into the base end tube portion 30b of the liquid injection nozzle 30 in a telescopic manner.
The outer end surface 51a of the head 51 is biased by a coil spring 56 fitted in the inner portion of the support shaft 4 so as to come into pressure contact with the outer circumferential surface of the support shaft 4, which is the fitting surface. And head 5
1 is pressed against and pushed into a portion of the outer circumferential surface of the support shaft 4 that does not have the notch 41, so that the valve 55 fitted into the stepped portion 54 is inserted into the base end cylindrical portion 31 of the liquid injection nozzle 30.
When the head 51 comes into contact with the valve seat 30c formed on the end face of the support shaft 4, the valve is closed, and when the head 51 faces the notch 41 provided on the fitting surface of the support shaft 4, it is pushed out by the coil spring 56, so that the O The ring-shaped valve 55 separates from the valve seat 30c and becomes open, thereby turning the communication between the liquid injection nozzle 30 and the liquid guide pipe 42 through the through hole 53 provided in the valve body 5 on and off. It's becoming controlled.

A notch 41 formed in the support shaft 4 is provided between the valve seat 30c provided on the end face of the base end 31 of the liquid injection nozzle 30 and the valve 55 provided in the step 54 of the neck of the valve body 5. Due to the movement of the valve body 5 described above, the liquid guiding pipe 42 of the support shaft 4 and the inside of the cylindrical portion of the liquid injection nozzle 30 are formed through the through hole 53. Communication with 30d is controlled on/off. For this reason, the liquid injection nozzle 30 is formed in the boss portion 32 between the valve seat 30c provided on the end face of the base end 31 of the liquid injection nozzle 30, in which the step portion 54 moves up and down, and the support shaft 4. The diameter d2 of the inner wall 32a of the mounting hole is larger than the diameter d3 of the head 51, so that a passage is formed around it.

In addition, in the figure, 2 is a drum-shaped ruler wheel assembled to the nozzle wheel 3 so as to coaxially rotate with the nozzle wheel 3.

Next, the operation of the soil injection machine configured as described above will be explained.

As the machine body a travels on the running wheels 11, the nozzle wheel 3 rotates, and as a result, the seventh
As shown in the figure, each liquid injection nozzle 30 is attached to a boss portion 32.
When the valve body 5 is in a state where it hangs downward from the ground, that is, when it is in a state where it pierces into the soil of the field, the outer end surface 51a of the head 51 is in the notch 4.
1 and comes into contact with the horizontal surface 41a of the notch 41, the valve mechanism c slides toward the center of the support shaft 4 by a depth H due to the bias of the coil spring 56, and the valve mechanism c opens. Then, the liquid conduit pipe 42 and the inside of the cylinder part 30d are opened through the through hole 53, and the chemical liquid from the chemical liquid tank T is fed under pressure to the spout 30a side via the pump P, and the check valve 33 is opened. It opens and sprays the chemical solution into the soil from the nozzle 30a.

Then, the head 51 of the valve body 5 of each liquid injection nozzle 30
When the outer end surface 51a of the head 51 of the valve body 5 comes off the notch 41 and rotates upward, the outer end surface 51a of the head 51 of the valve body 5 hits a portion of the fitting surface of the support shaft 4 where the notch 41 is not provided. Therefore, the valve 55 of the valve body 5 is pushed toward the liquid injection nozzle 30 by the distance H against the bias of the coil spring 56, and the valve 55 of the valve body 5 is pushed into the base end 3 of the liquid injection nozzle 30.
1, the valve mechanism c
With the valve in the closed state, the liquid guide pipe 4 is connected through the through hole 53.
2 and the inside 30d of the cylindrical portion of the liquid injection nozzle 30 are cut off.

As described above, the soil injection machine according to the present invention has a plurality of liquid injection nozzles 3 radially extending from the boss portion 32.
A support shaft 4 is provided with a nozzle wheel 3 from which 0... protrudes fixed to a machine body a that can freely travel by means of running wheels 11.
In the soil injection machine, which is supported by a shaft with a loose fit so that the tip side of the injection nozzle 30 sticks into the soil and rotates when the machine body a runs, the boss part 32 of the nozzle wheel 3 is A base end portion of each liquid injection nozzle 30 is disposed between each base end portion 31 of the liquid injection nozzle 30 assembled radially in the body and the fitting surface of the support shaft 4 that is in sliding contact with the inner circumferential surface of the boss portion 32. A valve body 5 that slides forward and backward with respect to the support shaft 4 is respectively assembled and urged by a coil spring 56 to be pushed toward the fitting surface of the support shaft 4. A notch 41 is provided on the lower surface side of the valve body 5 to allow the valve body 5 to be pushed out by the coil spring 56.
The valve 55 is pressed against the valve seat 30c provided at the base end 31 of the liquid injection nozzle 30 by being pushed against the bias of the coil spring 56 due to the collision with the fitting surface of the support shaft 4.
and the opening 4 of the liquid guide pipe 42 provided in the support shaft 4.
2a is opened in the above-mentioned notch 41 of the support shaft 4, so that the valve body 5 separately assembled in each base end of each liquid injection nozzle 30 of the nozzle wheel 3 is connected to the nozzle wheel 3. Due to the rotation of , the boss portion 32 of the nozzle wheel 3
A notch 41 provided on the lower surface side of the fitting surface with the boss portion 32 of the support shaft 4 that rotatably supports the
Inside the boss portion 32, the base end portion 31 of each liquid injection nozzle 30
The valves move forward and backward relative to each other, thereby opening and closing the valves to turn on and off the communication between each liquid injection nozzle 30 and the liquid guiding pipe 42,
In addition, the liquid injection nozzle 30 other than the liquid injection nozzle 30 stuck into the soil is cut off from the liquid guide pipe 42. For this reason, the liquid injection nozzles 30 other than the liquid injection nozzle 30 that is stuck in the soil
In order to prevent leakage of the chemical liquid from the nozzle 30a of..., a valve mechanism is provided separately for each liquid injection nozzle 30.
The boss portion 32 of the nozzle wheel 3 and the support shaft 4 that supports it
It is possible to construct a simple mechanism in the form of a rotary valve that utilizes the fitting surface with the rotary valve, resulting in cost reduction.

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional soil injection machine, Figure 2 is a vertical cross-sectional view of an improved nozzle car of a conventional soil injection machine,
Figure 3 is a side view of the idler type soil injector of the present invention in a non-working state, Figure 4 is a side view of the idler type soil injector in a working state, and Figure 5 is the same idler type soil injector. Fig. 6 is a longitudinal sectional view of the main part of the nozzle car of the soil injection machine, Fig. 6 is a longitudinal sectional view of the valve mechanism of the nozzle car, Fig. 7 is an explanatory diagram of the function of the nozzle car, and Fig. 8 is the drive of the present invention. FIG. 2 is a vertical cross-sectional view of a main part of a nozzle wheel of a ring-type soil injection machine. Explanation of drawing symbols, a... Airframe, b... Aircraft frame, c
... Valve mechanism, T ... Chemical tank, P ... Pump device, 10 ... Engine, 11 ... Running wheel, 2 ...
Ruler wheel, 3... Nozzle wheel, 30... Liquid injection nozzle,
30a...Nozzle port, 30b...Proximal tube portion, 30c...
...Valve seat, 30d...Inside the cylinder, 31...Base end, 3
2... Boss portion, 32a... Inner wall, 33... Check valve, d2, d3... Diameter, 4... Support shaft, 40... Home, 41... Notch, 41a... Horizontal surface, 42
...Liquid guide pipe, 42a... Opening, 43... Constriction, 44... Drain passage, 45... Drain hose, 5
... Valve body, 51 ... Head, 51a ... Outer end surface, 5
2...Cylinder, 53...Through hole, 54...Step, 55
...Valve, 56...Coil spring, 6...Gear.

Claims (1)

[Scope of utility model registration request] A plurality of liquid injection nozzles 30 radially extend from the boss portion 32.
A nozzle wheel 3 from which ... is protruded is attached to a support shaft 4 fixed to a machine body a that can freely travel by means of running wheels 11.
In a soil injection machine that is supported by a shaft with a loose fit so that the tip side of the injection nozzle 30 sticks into the soil and rotates when the machine body a runs, a radial shape is formed in the boss part 32 of the nozzle car 3. Each base end portion 31 and the boss portion 32 of the liquid injection nozzle 30 assembled to the
A valve body 5 that slides forward and backward with respect to the base end 31 of each liquid injection nozzle 30 is incorporated between the fitting surface of the support shaft 4 that is in sliding contact with the inner peripheral surface of A notch 41 is provided on the lower surface side of the fitting surface of the support shaft 4 to urge the support shaft 4 to be pushed out toward the fitting surface, and allows the valve body 5 to be pushed out by the coil spring 56. The base end 3 of the liquid injection nozzle 30 is pushed into the valve body 5 against the bias of the coil spring 56 due to the collision with the fitting surface of the support shaft 4.
A valve 55 is provided in pressure contact with the valve seat 30c provided in 1,
A soil pouring machine in which an opening 42a of a liquid guiding pipe 42 provided in a support shaft 4 is opened in the aforementioned notch 41 of the support shaft 4.