JPH0691771B2 - Fertilizer application - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fertilizer application device, particularly to a fertilizer application device mounted on a paddy field vehicle such as a rice transplanter, and more particularly to a sub tank in a fertilizer application device for paste or liquid fertilizer. .

(B) Conventional Technology As shown in FIGS. 11 and 12, a rice transplanter 1 equipped with a conventional fertilizer application apparatus has fertilizer tanks 3 and 3 arranged on the left and right sides of a driver's seat 2 and also has a fertilizer plant. A nozzle 9 is installed near each planter 6 of the attachment part 5. Then, the fertilizer tanks 3, 3 are connected to a sub tank 11 near the center of the traveling machine body by a suction hose 10, and further installed under the driver's seat from the sub tank 11 through a large number of hoses 12 in accordance with the number of planted rows. Is guided to the pump 13. In the pump 13, a large number of flex rotor pumps 13a, which correspond to the number of planted threads, are arranged side by side in the machine longitudinal direction. These pumps rotate from the PTO drive shaft 15 via a power transmission device 16 such as a belt. Driven. Further, the outlets of the rotor pumps 13a are communicated with the indicators 20 installed next to the driver's seat 2 via the hoses 19 and the vicinity of the planter 6 from the indicators 20 via the hoses 21 again. Of the nozzle 9 ...

Based on the above configuration, when the pump 20 is driven in association with the planting work, the paste (or liquid) fertilizer in the fertilizer tank 3 is supplied to the sub tank 11 via the hose 10, and a large number of the sub tank 11 further. Of the pumps, each of which is sucked into the rotor pump 13 and is further discharged from the discharge port of each pump to each indicator 20 through each hose 19. As a result, the driver in the driver's seat 2 can confirm the flow of each hose by the indicator 20, and each indicator 20 guides the nozzle 9 through the hose 21 to the vicinity of the planted seedling by the planter 6. The fertilizer is applied in the form of streaks along the line.

(C) Problems to be Solved by the Invention By the way, in the above embodiment, the pump device 13 and the sub tank 11 are used.
Are installed apart from each other, are distributed to a large number of hoses 12 in the sub tank 11, and are supplied to the respective pumps 13a by the relatively small-diameter hoses 12.

For this reason, the number of hoses becomes extremely large, which makes the piping work very troublesome, and the hose 12 having a small diameter is used to pump the hose.
Since it is sucked into 13a, especially when the fertilizer has a high viscosity,
The flow resistance of the fertilizer increases, which adversely affects the discharge performance of the pump.

(D) Means for Solving the Problem The present invention is intended to solve the above-mentioned problems, and as shown in FIG. 1, a pump device 40 is composed of a large number of pumps 40a to 40f. And a drive unit 95 for driving the drive shafts 66 of these many pumps at the same time, and a case 81 and a drive unit case for supporting the many pumps.
A sub-tank 87 is formed between the sub-tank 87 and the drive section case 82 facing the sub-tank, and the multiple drive shafts 66 are supported in an oil-tight manner, and the pump support case 81 facing the sub-tank is provided. .. are formed, and the pumps 40a to 40f are fixed so that the suction side a of each of the pumps is located in the open hole 81a.

(E) Action Based on the above configuration, when the paste (or liquid) fertilizer is supplied from the fertilizer tank to the sub-tank 87 due to the head difference, when the pump drive shaft 66 rotates, the pumps 40a to 40f are driven all at once. The fertilizer is directly sucked and discharged toward the nozzle by each pump whose suction side a faces the sub tank 87.

(F) Example Hereinafter, an example of the present invention will be described with reference to the drawings.

The passenger rice transplanter 21 has front wheels as shown in FIG. 9 and FIG.
It has a traveling body 25 supported by 22 and rear wheels 23, and the traveling body 25 has an engine 26 at the front portion of its front wheels.
And a driver's seat 29 is arranged so that the seat 27 is located in the middle portion between the front and rear wheels, that is, the center of gravity of the machine. Further, a planting section 30 is supported at the rear of the traveling machine body 25 via a link 28 so as to be able to move up and down, and on the planting section 30, a large number of planters 6 ... A long seedling stand 31 that can be placed is provided.

Fertilizer tanks 32, 32 for paste or liquid fertilizers are installed on the left and right in front of the machine.
, A hose 36 communicates with the fuselage frame 35, and a suction hose 39 extends rearward from the hose 36 below the step surface 37 of the driver's seat 29. It communicates with a pump device 40 disposed at a position below 27. Further, fertilizer flow sensors 42 and switching valves arranged side by side in the machine body from the pump device 40 via hoses 41 ...
It is led to the nozzle 38 in the vicinity of the planter 6 via each hose 43 and the anti-dripping valve 45. Reference numeral 44 in the drawing denotes a return hose returned from the switching valve 38 to the sub tank of the pump device 40.

On the other hand, as shown in FIG. 1 to FIG.
Is driven via a transmission 49 from a PTO drive shaft 47 extending through substantially the center of the airframe. That is, the transmission 49 has three shafts 51, 52, 53 supported by the case 50, and has a sprocket 55 fixed to the input shaft 51 and a sprocket fixed to the PTO drive shaft 47. A chain 57 is wound around 56 and power is transmitted. Also, the input shaft
51 includes a gear set 60 which is switched by a shift lever 59.
Is slidably supported, and a large number of gears 61 ... Are fixed to the intermediate shaft 52. Further, the output shaft 53 is also slidably movable with a gear set 63 which is switched by a shift lever 62. Supported by. A sprocket 65 is fixed to the output shaft 53 so as to project from one end.
A chain 69 is wound around the sprocket 67 fixed to one drive shaft 66a of the pump device 40. In addition,
1, 70 and 71 in FIG. 1 are chain cases, and 72 in FIG. 5 is a fixed stay for attaching the transmission 49 to the frame 35.

On the other hand, the pump device 40 is a screw pump as shown in FIG.
The screw pump 40a includes a screw shaft 75 having a screw-shaped recess and a rubber pump body 76 having a hole into which the screw shaft 75 fits. A drive shaft 66 extending from the drive shaft 95 is connected to the shaft 75 via a joint 77, and a body 76 is fixed to a case 81 together with a pump cover 80, and the case 81 is provided for each pump. Open holes 81a ... Are formed.
Then, as shown in FIGS. 1 to 4 and 7,
The pump device 40 has a large number (six) of screw pumps 40a to 40f arranged on the same circumference and their screw axes oriented in the longitudinal direction of the machine body, and the drive shafts 66 ... also on the same circumference. It is arranged. These drive shafts 66 are rotatably and oil-tightly supported by a drive case 82, and a gear 83 is fixed. Further, in the center of the case 82, an intermediate shaft 84
The intermediate gear 85 is rotatably supported by the gears 83, and as shown in FIG. 7, the gears 83 of the drive shaft 66 are interlocked with each other via the intermediate gear 85. It should be noted that one of the drive shafts 66a is extended and power is transmitted from the transmission 49. Further, a cylindrical sub-tank case 86 is sandwiched between the cases 81 and 82 constituting the pump device 40 by oil-tight bolts, and the space surrounded by these cases constitutes a sub-tank 87. There is. Therefore, the sub tank 87
Is connected to a hose 39, and these pumps are fixed such that the suction sides a of the pumps 40a to 40f are located in the open holes 81a of the pump support case 81 facing the sub tank 87. The discharge side b of each pump is connected to a hose 41 fixed to each cover 80.

Since the present embodiment is configured as described above, the gear ratio of the transmission 49 is set in advance based on the seedling type, planting interval, and the like. That is, by switching the shift lever 59, the gear set 60
Is selectively meshed with the predetermined gear 61 on the intermediate shaft, and the gear set 63 is selectively meshed with the predetermined gear 61 on the intermediate shaft by another shift lever 62.

On the other hand, the fertilizer tanks 32, 32 installed at the front of the fuselage contain pasty (or liquid) fertilizer, and the fertilizer in the tank is based on its fluidity and head difference, and the hose 36 and the suction hose. It is supplied to the sub tank 87 via 39.

Then, when the PTO drive shaft 47 rotates with the start of the planting work, the sprocket 56, the chain 57, and the sprocket 55 are rotated.
The rotation is transmitted to the input shaft 51 of the transmission 49 via the gears, and the gears are set in advance so that the gears are changed to a predetermined number of revolutions and transmitted to the output shaft 53.
It is transmitted to the pump drive shaft 66a via 69 and the sprocket 67. Then, the gear 8 fixed to the one drive shaft 66a.
By the rotation of 3, the intermediate gear 85 rotates, and further, through the gears 83 meshing with the intermediate gear, the multiple drive shafts 66 ... Arranged on the circumference rotate simultaneously and in the same direction. To do. As a result, the screw shafts 75 of the pumps 40a to 40f are rotated through the joint 77, and the pumps simultaneously paste the paste (or liquid) fertilizer in the sub tank 87 from the suction side facing the sub tank. Discharge to the discharge side b, and further hose 41
Through the flow sensor 42 and the switching valve 38, and continuously fertilized into the soil from each nozzle 46 through the hose 43 and the anti-draining valve 45.
Since the screw shafts 75 of a to 40f are eccentrically moved, joints 77 are respectively installed between the screw shafts 75 and the drive shaft 66. The paste-like fertilizer in the pump 40a-4 is agitated to prevent it from solidifying and to be smoothed in a uniform state.
Flowed into 0f.

In addition, the above-mentioned implementation side demonstrated the case where it applied to the rice transplanter of 6-row planting, therefore, 6 screw pumps 40a-40f were also required.
The substantially same traveling machine body 25 can be used with a slight change such as changing the size of the vehicle. Therefore, in the case of 5-row planting or 4-row planting, although the number of pumps installed is different, as shown in FIG. 40 and transmission
The same device can be used without replacing 49 with a special one.

Also, the above-mentioned implementation side explained the rice transplanter for riding,
Of course, it can also be applied to other paddy field work vehicles such as flooded paddy soil seeders.

(G) Effect of the Invention As described above, according to the present invention, a large number of pumps 40 are provided.
Since the sub-tank 87 is formed between the case 8 that supports a to 40f and the drive unit case 82, and the suction side a of each pump is located facing the sub-tank, each pump is a sub-tank.
It is possible to inhale directly from 87, and even fertilizers with a relatively high viscosity such as paste fertilizer can be inhaled reliably and smoothly without receiving tube resistance, and fertilization can be performed with a stable discharge amount. In addition, the piping from the sub-tank to the pump device is no longer required as in the past, the piping work for the hose is extremely simple, and no special distributor is required.
The structure is extremely simple, and the fertilizer application device can be easily attached to the paddy field vehicle.

Further, the drive shaft 66 is supported by the drive case 82 in an oil-tight manner,
Further, by forming the open holes 81a ... In the pump support case 81 and fixing the pumps 40 ... so that the suction side a of each pump is located in the open holes, the sub tank 87 is supported by the drive unit case 82 and the pump support. Since the case 81 is used, compared with the case where a dedicated sub-tank is used, the space is shared by using the same material, and the sub-tank itself can be made extremely simple and compact.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a transmission and a pump device according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a front view thereof, and FIG. 4 is a plan view thereof. 5 is a transverse sectional view of the transmission, FIG. 6 is a sectional view showing a screw pump, and FIG. 7 is a schematic front view showing a pump driving portion. Further, FIG. 8 is a sectional view showing a state where a part of the pump is not used. Further, FIG. 9 is an overall side view showing a riding rice transplanter to which the present invention is applied, and FIG. 10 is a plan view thereof. Fig. 11 is a side view showing a conventional riding rice transplanter with a fertilizer application device, and Fig. 12 is a rear view seen from the rear. 21… Passenger paddy work vehicle, 25… Machine, 30… Planting part, 31… Long seedling stand, 32… Fertilizer tank, 40… Pump device, 39… Suction hose, 40a ～ 40f… (Screw) pump, 41… Discharge side hose, 49 ... Transmission, 66 ... Drive shaft, 75 ... Screw shaft, 77 ... Joint, 83 ... Gear, 81 ... Pump support case, 81a ... Open hole, 82 ... Drive case, 85 ... Intermediate gear, 86 … Sub tank case, 87… Sub tank, 95… Drive part, a… Suction side.

Claims (2)

[Claims] 1. A fertilizer applicator for sucking fertilizer from a sub-tank communicating with a fertilizer tank by a pump device and discharging the fertilizer toward a nozzle, wherein the pump device is composed of a number of pumps Drive unit for driving the drive shafts of the plurality of pumps at the same time, the sub-tank is formed between the case supporting the plurality of pumps and the drive unit case, and the plurality of drive units are provided in the drive unit case facing the sub-tank. The shaft is oil-tightly supported, and an open hole is formed in the pump support case facing the sub-tank, and the pumps are fixed so that the suction sides of the pumps are located in the open holes. apparatus. 2. The fertilizer applicator according to claim 1, wherein the pump is a screw pump, and the screw shaft of the screw pump and the drive shaft are connected by a joint in the sub-tank.