JPH073864Y2 - Liquid fertilizer injection structure of soil fertilizer applicator - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a liquid fertilizer injection structure of a soil fertilizer applicator for performing fertilization and the like in the deep part of the paddy field after rice planting.

(B) Conventional Technology Conventionally, a device such as a liquid fertilizer injection structure in a soil fertilizer applicator has been publicly known.

For example, it is as in the rear of Jitsukai Sho 62-111318.

(C) Problems to be Solved by the Invention However, as described above, the conventional technique has the following problems.

First, the nozzle is moved up and down by a crank mechanism operated by the power taken out from the transmission case. For this reason, the progress of the machine and the injection operation of the liquid fertilizer are not linked, it is difficult to make the injection pitch of the liquid fertilizer that suits the change of running, and it is difficult to inject the liquid fertilizer at the desired nozzle position in the soil. there were.

Second, since the liquid fertilizer is injected from the nozzle by direct actuation of the pump by the power in the mission case as well as the vertical movement of the nozzle, fertilizer runoff occurs at unnecessary injection positions. Was there.

(D) Means for Solving the Problems The object of the present invention is as described above, and the structure for achieving the object will be described below.

A soil fertilizer applicator A that injects the chemical solution in the chemical solution tank 13 mounted on the upper part of the machine into the soil by means of a nozzle 17 arranged behind the traveling section.
In the configuration, the route of the chemical liquid in the chemical liquid tank 13 is configured to reach from the pump 23 to the nozzle 17 via the valve 24, and the nozzle 17 is moved up and down by the operation of the eccentric cam 19 mounted on the axle 8 on the outer side of the traveling wheel 7. The valve operating arm 16 supporting the upper portion of the nozzle 17 is configured to intermittently open and close the valve 24.

(E) Embodiment The purpose and construction of the present invention are as described above. Next, the construction of the embodiment shown in the accompanying drawings will be described.

FIG. 1 is a side view of a soil fertilizer applicator according to the present invention, FIG. 2 is a plan view showing a power transmission structure, FIG. 3 is a perspective view of an eccentric cam and a tip of an interlocking rod, and FIG. The hydraulic circuit diagram shown in FIG. 5, FIG. 5 is an explanatory diagram showing the operation of the pump, and FIG. 6 is a side view showing another embodiment of the present invention.

In the soil fertilizer applicator A of the present invention, as shown in FIGS. 1 and 2, an engine 1 is arranged in the front part, and an output shaft 2 is arranged rearward from the engine 1. is there.
The mission case 3 is behind the output shaft 2 of the engine 1.
The intermediate case 4 is connected to the engine 1 with the engine 1 in a downward slope toward the rear to form a mission section 5.

In the transmission unit 5, the output shaft 2 is directly connected to the bevel gear 6 and is connected to another gear group connected to the main shaft 8 housed in the transmission unit 5 to transmit the power of the engine 1 to the main shaft 8. It is configured to do so. The upper end of a chain case 9 is connected to the main shaft 8, and the power from the main shaft 8 is transmitted to the traveling wheels 7 via the chain case 9. The traveling wheel 7 is composed of a single wheel in which one wheel is arranged in the substantially central portion of the airframe A, and a plurality of lug plates 10 are provided on the periphery of the wheel 7 so as to allow traveling in the paddy field. Configured. Reference numeral 11 is a grounding wheel that also serves as a weeding wheel, and the grounding wheel 11 has a weeding fork 11b protruding from the corner of a drum 11a having six shapes. 12 is a traveling handle.

Further, a chemical solution (fertilizer) tank 13 is placed on the upper end of the mission case 3 which is the upper part of the aircraft A.
The reference numeral 13 is provided almost directly above the traveling wheels 7 on the lower side so as to achieve good balance of the machine body.

A nozzle 17 for injecting liquid fertilizer is arranged behind the traveling wheel 7, and the upper end of the nozzle 17 is connected to one end of the valve operating arm 16. The other end of the valve operating arm 16 is supported on the side surface of the crankcase 14 attached to the rear end of the chain case 9.

As shown in FIGS. 1, 2 and 3, the rear end of the interlocking rod 18 is pivotally attached to the nozzle 17 in the vicinity of the substantially central portion thereof.
The front end of is engaged with the projection 19a of the eccentric cam 19 mounted on the end of the main shaft 8 of the traveling wheel 7 and interlocks with it.

Reference numeral 20 denotes a restricting body of the interlocking rod 18 mounted on the support plate 21 of the traveling wheel 7, and the interlocking rod 18 causes the interlocking rod 18 to move by the eccentric cam 19.
Is configured so as not to inadvertently disengage in the vertical and horizontal directions. 22 is a tension spring of the interlocking rod 18.

With this configuration, the main shaft 8 of the traveling wheels 7 can be driven by the power from the engine 1 to drive the machine body A to travel forward, and the eccentric cam 19 can be rotated by the drive of the main shaft 8 to cause the eccentric cam 19 to rotate. It is possible to slide the interlocking rod 18 back and forth by hooking the front end of the interlocking rod 18 by means of the projection 19a. This allows the upper end to be
The nozzle 17 supported by 16 moves up and down as it travels.

Then, the injection route of liquid fertilizer to be injected into the soil and the pump to be injected.
Explain the configuration of 23.

As shown in FIG. 4, the liquid fertilizer injection path is configured such that the liquid fertilizer in the chemical liquid tank 13 is sent from the valve 24 into the nozzle 17 by the pump 23 and discharged from the lower end of the nozzle 17.

The pump 23 is attached to the rear of the mission unit 5, and its structure and operation are as shown in FIG. That is, the pump cylinder 23a and the piston that slides in the cylinder 23a
23b and an operating lever 23c of the piston 23b, the chemical liquid tank 13 and the pump 23 are connected by an injection pipe 25, and the pump 23 and the nozzle 17 are exhausted by a discharge pipe.
Connected by 26.

The operation of the pump 23 is, as shown in FIGS. 2 and 5, provided with a cam 29 on the rear end shaft 28 for driving the power in the mission case 4 by the chain 27.
The upper sliding body 30 moves up and down by the rotation of
23c is rotated up and down, and the piston 23b of the pump 23 is slid. As a result, the liquid fertilizer in the chemical liquid tank 13 is sent into the pump cylinder 23a through the injection pipe 25, and is further sent out from the discharge pipe 26 toward the nozzle 17.

However, originally, the liquid fertilizer should be injected (discharged) only when the ascending / descending nozzle 17 is located in the soil, but with such a configuration only, the liquid fertilizer is constantly sent out by the pump 23 and unnecessary. It was the cause of dripping.

Therefore, the present invention further uses the valve operating arm 16 to open and close the valve 24 mounted on the discharge pipe 26 that connects the pump 23 and the nozzle 17, and to operate the valve operating arm as the injection nozzle 17 moves up and down. Valves that capture 16 movements 24
It is configured to operate intermittently. This makes the nozzle
Liquid fertilizer is discharged only when 17 is located in the soil,
It is possible to prevent unnecessary drainage. Further, the valve operating arm 16 is also configured to interlock with a manual lever 32 that is supported so as to project upward and rearward from the side surface of the machine body A. The manual lever 32 can also discharge liquid fertilizer manually when necessary. is there.

It should be noted that, with the above-described configuration, although the stroke of the up-and-down movement of the nozzle 17 and the discharge of the liquid fertilizer accompanying the traveling of the traveling wheels 7 cannot be changed, as shown in FIGS. By exchanging the eccentric cam 19 attached to the end with one having a plurality of protrusions 19a′19a ″, it is possible to change the vertical movement of the nozzle 17 and the stroke of discharging the liquid fertilizer.

As shown in FIG. 7, the present invention provides a clutch 33 between the eccentric cam 19 and the axle 8 and operates the clutch 33 by a clutch lever 34 mounted near the traveling handle 12 of the airframe A. When it is not necessary to apply liquid fertilizer even during traveling (for example, during general traveling), the vertical movement of the nozzle 17 can be stopped and the discharge of liquid fertilizer can also be stopped.

(F) Effect of the Invention Since the present invention is configured as described above, it has the following effects.

First, the liquid fertilizer could be injected accurately because the vertical movement of the nozzle was synchronized with the traveling wheels.

Secondly, since the upper part of the nozzle is interlocked with the valve operation arm, it is possible to inject it at a desired nozzle position in the soil and to eliminate the drainage of liquid fertilizer.

Thirdly, since the nozzle is located near the rear of the traveling wheel and the chain case for raising and lowering the nozzle is unnecessary, the length of the machine can be shortened and the turning of the machine is facilitated. I was able to do it.

[Brief description of drawings]

FIG. 1 is a side view of a soil fertilizer applicator according to the present invention, FIG. 2 is a plan view showing a power transmission structure, FIG. 3 is a perspective view of an eccentric cam and a tip of an interlocking rod, and FIG. The hydraulic circuit diagram shown in FIG. 5, FIG. 5 is an explanatory diagram showing the operation of the pump, and FIG. 6 is a side view showing another embodiment of the present invention. A: Fertilizer for soil 7: Wheel running 8: Axle 13: Chemical tank 16: Valve operating arm 17: Nozzle 19 ... Eccentric cam 23 ... Pump 24 ... Valve

Claims (1)

[Scope of utility model registration request] 1. In a soil fertilizer applicator A in which a chemical solution in a chemical solution tank 13 mounted on the upper part of a machine is injected into a soil by a nozzle 17 arranged at the rear of a traveling part, a route of the chemical solution in the chemical solution tank 13 is pumped from a pump 23 to a valve. It is configured to reach the nozzle 17 through 24,
Further, the nozzle 17 is moved up and down by the operation of the eccentric cam 19 mounted on the axle 8 on the outer side of the traveling wheel 7, and
The valve operating arm 16 supporting the upper part of the valve
A liquid fertilizer injection structure for a soil fertilizer applicator, which is characterized in that it is configured to intermittently open and close.