JP2023080311A - work vehicle - Google Patents

Abstract

To provide a work vehicle that supplies a preset amount of fertilizer application to a farm field.SOLUTION: A work vehicle includes a fertilizer application device (5) for supplying a fertilizer to a farm field. The fertilizer application device (5) includes: a fertilizer tank (60); a delivery mechanism (61) for delivering the fertilizer from the fertilizer tank (60); and a fertilizer application hose (62) for transporting the fertilizer from the delivery mechanism (61). The delivery mechanism (61) includes a delivery part that is rotated predetermined times to deliver a fertilizer to the fertilizer application hose (62). A weight of the delivered fertilizer is artificially measured with trial delivery by the fertilizer application device (5). The work vehicle is provided with an input device capable of inputting a measured weight of the fertilizer and setting of an amount of applied fertilizer that is a weight of a fertilizer to be supplied to the farm field. The work vehicle corrects a delivery amount of fertilizer to be delivered from the delivery part while taking an account of the measured weight of the fertilizer when actually delivering a fertilizer to the farm field.SELECTED DRAWING: Figure 1

Description

The present invention relates to work vehicles.

2. Description of the Related Art Conventionally, for example, a work vehicle is known that performs work while supplying fertilizer to a field when transplanting seedlings (see, for example, Patent Literature 1). In such a work vehicle, the amount of fertilizer to be fed out from the storage section can be adjusted.

JP 2014-230519 A

However, the work vehicle as described above does not consider the specific gravity of the fertilizer. Fertilizers have different specific gravities depending on the type and the conditions at the time of use. Therefore, if the fertilizer is supplied without considering the specific gravity, the applied amount of the fertilizer supplied to the field may not be the set amount. As a result, for example, an increase in cost due to an increase in the amount of fertilizer applied, and poor growth of crops due to excess or insufficient fertilizer may occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a working vehicle that supplies a set amount of fertilizer to a field.

In order to solve the above-described problems and achieve the object, the work vehicle according to claim 1 includes a fertilizer applicator (5) that supplies fertilizer to a field, and the fertilizer applicator (5) includes a fertilizer tank (60). a feeding mechanism (61) for feeding the fertilizer from the fertilizer tank (60); and a fertilizing hose (62) for conveying the fertilizer from the feeding mechanism (61), wherein the feeding portion of the feeding mechanism (61) By rotating the (61a) a predetermined number of times, the fertilizer is fed out and guided to the fertilizing hose (62). An input device capable of setting the input of the measured weight of the fertilizer and the amount of fertilizer applied, which is the weight of the fertilizer to be supplied to the field, is provided, and when the fertilizer is actually supplied to the field, the measured weight of the fertilizer is taken into consideration. It is characterized by correcting the amount of feeding from the feeding portion (61a).

The work vehicle according to claim 2 is the work vehicle according to claim 1, wherein the fertilizing hose (62) is detachable, and the fertilizing hose (62) can be detached from the left and right directions of the traveling vehicle body. characterized by

A work vehicle according to claim 3 is the work vehicle according to claim 1 or 2, wherein the feeding mechanism (61) includes a feeding portion (61a) rotatably supported and is driven by a motor (101). The delivery part (61a) is configured to rotate, and the rotational speed of the delivery part (61a) is set based on the measured weight of the fertilizer and the amount of fertilizer applied.

The work vehicle according to claim 4 is the work vehicle according to any one of claims 1 to 3, wherein the input device is provided on an operation panel of the traveling vehicle body, the input measured weight is stored, When starting the work again, it is characterized by the memorized measurement weight.

According to the work vehicle of claim 1, by setting the weight of the fertilizer fed out to the fertilizing hose and the amount of fertilizer fed to the field by trial feeding of the fertilizing device, the set amount of fertilizer applied is obtained. Fertilizer can be supplied to the field. Therefore, it is possible to suppress the increase in cost due to an increase in the amount of fertilizer applied and the poor growth of crops due to excess or insufficient fertilizer.

According to the work vehicle described in claim 2, in addition to the effect of the invention described in claim 1, the attachment/detachment operation can be easily performed.

According to the work vehicle described in claim 3, in addition to the effects of the invention described in claim 1 or 2, fertilizer can be supplied to the field with an appropriate amount of fertilizer applied, and the cost due to an increase in the amount of fertilizer applied It is possible to suppress the increase of fertilization and the poor growth of crops due to excess fertilizer or insufficient fertilizer.

According to the work vehicle described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the measured weight is stored, and when the work is restarted, the stored weight is stored. With the measured weight, for example, when the field is moved and the same fertilizer is supplied to the field, the fertilizer of the set fertilizer application amount can be supplied to the field without performing trial delivery again. Efficiency can be improved.

FIG. 1 is a side view of a seedling transplanter. FIG. 2 is a partially omitted plan view of the seedling transplanter. FIG. 3 : is sectional drawing of the left-right direction in the lower side of a fertilizer tank. FIG. 4 is a perspective view of the joint seen obliquely from the rear. FIG. 5 is a block diagram centering on a control device provided in the seedling transplanter. FIG. 6 is a diagram showing a display example on the information processing terminal. FIG. 7 is a diagram showing an example of inserting the second fertilizing hose into the container. FIG. 8 is a flow chart for explaining the feed amount setting control.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings. In addition, the present invention is not limited by the following embodiments. In addition, components in the following embodiments include those that can be easily assumed by those skilled in the art, or those that are substantially the same, that is, those within a so-called equivalent range. Also, the constituent elements in the following embodiments can be combined as appropriate.

In the following description, the front/rear and left/right directions are determined with reference to the running direction of the vehicle body as viewed from the cockpit 31 . FIG. 1 is a side view of the seedling transplanter 1, and FIG. 2 is a plan view of the seedling transplanter 1 with a part omitted. In the seedling transplanter 1, a seedling planting part 4 is attached to the rear of a traveling vehicle body 2 through an elevating link mechanism 3 so as to be able to ascend and descend. A main body portion of the fertilizing device 5 is provided on the rear upper side of the traveling vehicle body 2 .

The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and a pair of left and right rear wheels 11 as drive wheels. A transmission case 12 is provided at the front of the body of the seedling transplanter 1, and front wheel final cases 13 are provided on the left and right sides of the transmission case 12. - 特許庁The front wheels 10 are attached to a pair of left and right front wheel axles projecting outward from the vehicle body from supporting portions of the front wheel final case 13 capable of changing the steering direction of the front wheels 10 .

A front end of a main frame 15 is fixed to the back surface of the mission case 12 . A rear wheel gear case 18 is supported so as to be freely rolling with a rear wheel rolling shaft provided horizontally in the front-rear direction at the center of the rear end of the main frame 15 as a fulcrum. A rear wheel 11 is attached to a rear wheel axle projecting outward from the rear wheel gear case 18 of the machine body.

An engine 20 is mounted on the main frame 15 . Rotational power of engine 20 is transmitted to mission case 12 via belt transmission device 21 and HST 23 . The HST 23 is a hydrostatic continuously variable transmission called HST (Hydro Static Transmission). The rotational power transmitted to the mission case 12 is changed in speed by the transmission in the mission case 12, and then separated into traveling power and external power and taken out. A portion of the running power is transmitted to the front wheel final case 13 to drive the front wheels 10 , and the rest is transmitted to the rear wheel gear case 18 to drive the rear wheels 11 .

Further, the power for extracting the seedlings is transmitted to the seedling planting section 4 by the planting transmission shaft 26 and to the fertilizing device 5 by the fertilizing transmission mechanism.

Engine 20 , which is an internal combustion engine, is housed in engine cover 30 . An operator's seat 31 is arranged above the engine cover 30 . A front cover 32 containing various operating mechanisms is arranged in front of the cockpit 31 . On the left and right sides of the front cover 32, a pair of spare seedling frames 38 for placing seedlings for supply are arranged. A handle 34 for steering the front wheel 10 is provided on the upper portion of the front cover 32 .

Horizontal floor steps 35 are provided on both left and right sides of the lower ends of the engine cover 30 and the front cover 32 . A part of the floor step 35 has a lattice shape, and can drop, for example, mud adhering to the worker's shoes onto the farm field. Auxiliary steps 35 a provided lower than the upper surface of the floor step 35 are provided at both left and right ends of the floor step 35 . The auxiliary step 35a facilitates getting on and off the seedling transplanter 1 by the operator.

The lifting link mechanism 3 is a parallel link mechanism and has an upper link 40 and a lower link 41 . The tip end sides of the upper link 40 and the lower link 41 are vertically rotatably supported by a gate-shaped link base frame 42 erected on the rear end of the main frame 15 when viewed from the rear. A vertical link 43 is connected to the rear end sides of the upper link 40 and the lower link 41 . A connecting shaft 44 that is rotatably supported by the seedling planting section 4 and extends in the longitudinal direction of the traveling vehicle body 2 is connected to the lower end of the vertical link 43 . The seedling planting part 4 is provided so as to be freely rolling around the connecting shaft 44 .

A lifting hydraulic cylinder 46 is attached to the main frame 15 . The tip of the lifting hydraulic cylinder 46 is connected to the tip of the upper link 40 . When the upper link 40 rotates in the vertical direction due to the expansion and contraction of the elevating hydraulic cylinder 46, the seedling planting section 4 is elevated while maintaining a substantially constant posture.

The seedling planting unit 4 of the seedling transplanter 1 according to the present embodiment is shown as an example of a six-row planting configuration, and includes a seedling placement unit 51, a seedling planting device 52, and a line-drawing marker 19. . The seedling placement unit 51 places the mat seedlings and reciprocates in the left-right direction to supply the seedlings one by one to the seedling outlets of each row, and the seedlings for one horizontal row are supplied to the seedling outlets. and the seedling feeding belt 51a to transfer the seedlings downward.

In the seedling planting device 52, planting rotary shafts are rotatably provided at both ends of the rotary case 16. As shown in FIG. A seedling planting tool 54 is attached to the planting rotating shaft.

In the lower part of the seedling planting part 4, a center float 55 is provided in the center and side floats 56 are provided at both left and right ends. When the machine body is advanced with the center float 55 and the side floats 56 installed on the mud surface of the field, the center float 55 and the side floats 56 level the ground while sliding on the mud surface. Seedlings are planted by the seedling planting device 52 in the leveled field. Note that the center float 55 and the side floats 56 are provided rotatably about, for example, horizontal pivots so as to move up and down corresponding to unevenness of the topsoil surface of the field.

Here, the fertilizing device 5 will be described in detail with reference to FIGS. 1 to 3. FIG. FIG. 3 is a horizontal cross-sectional view of the lower side of the fertilizer tank 60. As shown in FIG. The fertilizing device 5 includes a fertilizer tank 60 , a delivery mechanism 61 , a fertilizing hose 62 , a fertilizer supply section 63 , a blower 64 and a chamber 65 .

A pair of fertilizer tanks 60 are arranged on the left and right sides of the traveling vehicle body 2 and store fertilizer to be supplied to the field. The fertilizer tank 60 branches into three chambers in the front-rear direction on the lower side. An opening is formed in the bottom of each chamber. A pair of fertilizer tanks 60 are arranged on the left and right, and the number of openings on the lower side is six. The opening on the lower side is provided according to the row number of the seedling transplanter 1 . Since the seedling transplanter 1 according to the present embodiment has a six-row planting configuration, six openings are formed. In addition, the fertilizer tank 60 may be divided into three chambers. A delivery mechanism 61 is connected to each opening on the lower side.

The delivery mechanism 61 includes a delivery portion 61 a that delivers fertilizer to the fertilizing hose 62 and a bypass portion 61 b that bypasses the delivery portion 61 a and discharges the fertilizer to the fertilizing hose 62 . As with the lower opening of the fertilizer tank 60, six delivery mechanisms 61 are provided according to the number of rows. Fertilizer flows into the delivery mechanism 61 from the lower opening of the fertilizer tank 60 . A first fertilizing hose 70 is connected to the feeding mechanism 61 below the feeding portion 61a.

The delivery portion 61a has a substantially columnar shape and is rotatably supported by a case 61c of the delivery mechanism 61 . The feeding portion 61a is rotated by being driven by a fertilizer application amount adjusting motor 101 (see FIG. 5). A plurality of recesses 61d are formed in the feeding portion 61a along the rotation direction. The recessed portion 61d opens radially outward of the extending portion 61a.

The delivery part 61a causes the fertilizer to flow into the concave portion 61d located on the upper side, and rotates to move the concave portion 61d containing the fertilizer downward, thereby dropping the fertilizer from the concave portion 61d. The feeding mechanism 61 is connected to the first fertilizing hose 70 on the lower side of the feeding portion 61 a , and the fertilizer that has fallen from the recess 61 d flows into the first fertilizing hose 70 . In this manner, the fertilizer in the fertilizer tank 60 is delivered to the first fertilizing hose 70 by rotating the delivering portion 61a. The feed-out portion 61a can adjust the feed amount of fertilizer (hereinafter referred to as feed-out amount) with respect to the running distance of the seedling transplanter 1 by adjusting the rotation speed with the fertilizer application amount control motor 101 .

The bypass portion 61b is formed outside the delivery portion 61a and is formed so as to bypass the delivery portion 61a and discharge the fertilizer. The bypass portion 61 b connects the fertilizer tank 60 and the fertilizing hose 62 via the discharge boot 67 . An on-off valve 66 is provided at an upper opening of the bypass portion 61b.

The on-off valve 66 is, for example, a rotary valve operated by a lever. Note that the on-off valve 66 may be of a slide type. The on-off valve 66 opens and closes the bypass portion 61b to switch the inflow state of the fertilizer to the bypass portion 61b. When the open/close valve 66 is opened, the fertilizer flows into the bypass portion 61b. On the other hand, when the on-off valve 66 is closed, fertilizer does not flow into the bypass portion 61b.

The fertilizing hose 62 includes a first fertilizing hose 70 , a joint 71 and a second fertilizing hose 72 . Six fertilizing hoses 62 are provided according to the number of threads.

The first fertilizing hoses 70 are provided below the feeding portions 61a and connected to the feeding mechanism 61 by connecting portions 70a. The first fertilizing hose 70 extends in the left-right direction. The inner end of the first fertilizing hose 70 is connected to the first air duct 65 a of the chamber 65 or the third air duct 65 c of the chamber 65 . The outer end of the first fertilizing hose 70 is connected to the first branch 71 a of the joint 71 . Fertilizer is delivered from the delivery mechanism 61 to the first fertilizing hose 70 by the delivery part 61a.

The joint 71 is, as shown in FIG. 4, a three-pronged joint composed of a first branch portion 71a, a second branch portion 71b, and a third branch portion 71c. FIG. 4 is a perspective view of the joint 71 viewed obliquely from the rear. A first fertilizing hose 70 is connected to the first branch portion 71a. A discharge boot 67 is connected to the second branch portion 71b. A second fertilizing hose 72 is connected to the third branch portion 71c.

The second fertilizing hose 72 is a flexible hose. One end of the second fertilizing hose 72 is connected to the joint 71 and the other end is connected to the fertilizer supply section 63 via the connecting section 73 . The second fertilizing hose 72 is detachably connected to the fertilizer supply section 63 via the connecting section 73 . The connecting portion 73 is provided at a location where a worker can easily perform the attachment/detachment operation from the left and right directions of the traveling vehicle body 2 .

The blower 64 is provided in front of the fertilizer tank 60 arranged on the left side of the traveling vehicle body 2 . The blower 64 is driven by the blower motor 102 to suck air and blow the sucked air into the chamber 65 .

The chamber 65 is connected to a first air pipe 65a extending rearward from the blower 64, a second air pipe 65b extending in the left-right direction, and a second air pipe 65b. and a third blower pipe 65c extending forward.

Each first fertilizing hose 70 provided on the left side of the traveling vehicle body 2 is connected to the first blower pipe 65a. Each first fertilizing hose 70 provided on the right side of the traveling vehicle body 2 is connected to the third blower pipe 65c. The chamber 65 allows air blown by the blower 64 to flow into each first fertilizing hose 70 .

The fertilizer supply part 63 extends from the connection part 73 to the front of the center float 55 or the side float 56 . Six fertilizer supply units 63 are provided according to the number of rows. The fertilizer supply unit 63 drops the fertilizer conveyed through the fertilizing hose 62 into the field.

In addition, although the case where the fertilizer supply part 63 etc. were provided according to the number of rows was demonstrated as an example here, it is not limited to this. For example, one fertilizer supply unit 63 or the like may be provided for two rows. In this case, for example, the fertilizer supply unit 63 is provided so as to supply the fertilizer near the middle between two adjacent rows.

Next, the control system of the seedling transplanter 1 will be explained. FIG. 5 is a block diagram centering on the control device 150 of the seedling transplanter 1. As shown in FIG. The seedling transplanter 1 according to this embodiment can control each part by electronic control, and the seedling transplanter 1 includes a control device 150 for controlling each part. The control device 150 includes a controller 150a provided on the traveling vehicle body 2 and a detachable information processing terminal 150b.

The controller 150a and the information processing terminal 150b are provided with a processing unit having a CPU (Central Processing Unit) and the like, a storage unit such as a ROM (Read Only Memory) and a RAM (Random Access Memory), and an input/output unit. These are connected to each other and can exchange signals with each other. A computer program for controlling the seedling transplanter 1 and the like are stored in the storage unit. The controller 150a and the information processing terminal 150b perform their respective functions by reading computer programs and the like stored in the storage unit.

For example, the controller 150a performs automatic elevation processing for raising and lowering the seedling planting unit 4 and the like based on information acquired by the depth sensor 111 and the rotation sensor 170 .

For example, the controller 150a includes, as actuators, a throttle motor 100 that increases or decreases the rotation speed of the engine 20 by operating a throttle (not shown) that adjusts the intake air amount of the engine 20, and controls the rotation speed of the extension portion 61a. A fertilizer application amount adjustment motor 101 for adjusting the amount of fertilizer applied to the field, a blower motor 102 for driving the blower 64, a rotary motor 103 for rotating the depth sensor 111, and a hydraulic control valve 104 for controlling the expansion and contraction of the elevating hydraulic cylinder 46. etc. are connected.

Further, the fertilizer concentration sensor 110, the depth sensor 111, the water temperature sensor 112, the tilt sensor 113, the weight sensor 114 and the like are connected to the controller 150a as sensors.

The fertilizer concentration sensor 110 is provided on each of the left and right front wheels 10 and detects the concentration of fertilizer between the left and right front wheels 10 . For example, the fertilizer concentration sensor 110 is composed of an annular electrode plate, and is arranged inside or outside the front wheel 10 and near the outer peripheral edge near soil or water.

A plurality of depth sensors 111 are rotatably attached to the traveling vehicle body 2 via an attachment shaft or the like. For example, the depth sensor 111 measures the depth to the water surface or the soil surface by reflecting ultrasonic waves or laser light.

The water temperature sensor 112 is attached to the electrode plate that constitutes the fertilizer concentration sensor 110 and detects the water temperature.

The fertilizer concentration sensor 110, the depth sensor 111, and the water temperature sensor 112 are sensors that detect the state of the field, that is, the soil fertility.

The tilt sensor 113 detects pitching of the traveling vehicle body 2, that is, tilting in the vertical direction. The controller 150a drives the rotation motor 103 to rotate the depth sensor 111 around the mounting shaft so that the depth sensor 111 is always oriented vertically in accordance with the tilt angle of the traveling vehicle body 2 detected by the tilt sensor 113. .

A weight sensor 114 is provided in the delivery mechanism 61 and detects the weight of the fertilizer in the fertilizer tank 60 . The weight sensor 114 is arranged, for example, near the delivery portion 61a of each delivery mechanism 61 .

The information processing terminal 150b is a tablet terminal configured with a touch panel display. The information processing terminal 150b has a scanner function capable of reading information such as characters, numbers, and symbols. The information processing terminal 150b can read, for example, a barcode printed on a fertilizer bag or the like to read the type of fertilizer.

In addition, the information processing terminal 150b can control operations of the seedling planting unit 4, the fertilizing device 5, and the like while cooperating with the controller 150a. The information processing terminal 150b can control operations of the seedling planting unit 4, the fertilizing device 5, and the like based on information stored while being connected to another work vehicle.

For example, operation buttons as shown in FIG. 6 are displayed on the operation screen of the information processing terminal 150b, and the operations of the fertilization device 5 and the like can be controlled by touching the operation buttons. FIG. 6 is a diagram showing a display example on the information processing terminal 150b.

The information processing terminal 150b includes, as operation buttons, a button 200 for inputting the fertilizer application amount (total weight of the fertilizer to be supplied to the field), a button 201 for inputting the trial feeding amount, and a button for selecting the fertilizer reduction rate. 202, a button 203 for starting rice planting, specific gravity, etc. are displayed. For example, when the button 200 for inputting the fertilizer application amount is touched, a screen for inputting the fertilizer application amount is displayed, and the fertilizer application amount can be input. Also, when the button 203 for starting rice planting is touched, rice planting is started.

In addition to the buttons 200 to 203 described above, the information processing terminal 150b also displays operation buttons for controlling operations of the seedling planting unit 4, the fertilizing device 5, and the like.

With the configuration described above, the seedling transplanter 1 can plant seedlings in a field while supplying fertilizer to the field. Here, the operation of supplying fertilizer by the fertilizer applicator 5 will be described in detail.

When supplying fertilizer to the field, first, the amount of fertilizer to be supplied to the field is input to the information processing terminal 150b. The amount of fertilizer applied is input according to the size of the field and the type of fertilizer to be used.

Then, the second fertilizing hose 72 is removed from the fertilizer supply section 63, and the removed end of the second fertilizing hose 72 is inserted into the container 80, for example, as shown in FIG. FIG. 7 shows an example of inserting the second fertilizing hose 72 into the container 80. As shown in FIG.

Then, the delivery portion 61a is rotated a predetermined number of times (for example, 30 times), trial delivery is performed, and the weight of the fertilizer delivered into the container 80 is measured. A trial delivery amount (fertilizer weight) delivered by the trial delivery is input to the information processing terminal 150b.

When the trial feeding amount is input, the information processing terminal 150b calculates the specific gravity based on the following formula.

Specific Gravity=(Trial Feeding Amount/Number of Threads)×Correction Coefficient It is a value set in advance by experiment or the like according to the type. For example, the correction coefficient is 1.42121.

The information processing terminal 150b sets the rotational speed of the feeding portion 61a based on the calculated specific gravity and the amount of fertilizer applied.

The information processing terminal 150b compares the calculated specific gravity with the standard specific gravity, and calculates the deviation of the specific gravity from the standard specific gravity. The standard specific gravity is a value set according to the type of fertilizer used and the type of seedling transplanter 1 . The type of fertilizer to be used can be obtained, for example, by reading a barcode printed on the case of the fertilizer to be used with the information processing terminal 150b.

The amount of fertilizer supplied to the field that enters the concave portion 61d of the delivery portion 61a may vary depending on the weather (temperature and humidity) at the time of use. Therefore, the amount of fertilizer delivered from the delivery portion 61a changes according to the weather when the fertilizer is supplied to the field.

For example, when the specific gravity is large, more fertilizer enters the concave portion 61d of the delivery portion 61a, the amount delivered by the delivery portion 61a increases, and the amount of fertilizer supplied to the field increases. On the other hand, when the specific gravity is small, less fertilizer enters the concave portion 61d of the delivery portion 61a, the amount delivered by the delivery portion 61a is small, and the amount of fertilizer supplied to the field is reduced.

In this way, due to the change in specific gravity, there is a risk that more fertilizer than the set fertilizer application amount will be supplied to the field, or less fertilizer than the set fertilizer application amount will be supplied to the field.

Therefore, the information processing terminal 150b calculates the difference between the calculated specific gravity and the standard specific gravity, and sets the rotational speed of the delivery unit 61a based on the calculated difference.

When the calculated specific gravity is larger than the standard specific gravity, the rotation speed of the delivery part 61a is made smaller than the predetermined rotation speed so that the amount of fertilizer applied to the field becomes the set amount of fertilizer. Further, when the calculated specific gravity is smaller than the standard specific gravity, the rotation speed of the delivery part 61a is made higher than the predetermined rotation speed so that the amount of fertilizer applied to the field becomes the set amount of fertilizer. The predetermined rotation speed is a preset rotation speed, and is set according to the amount of fertilization.

The information processing terminal 150b adjusts the feed amount of the feeding unit 61a by setting the rotational speed of the feeding unit 61a based on the specific gravity and the amount of fertilizer applied. As a result, the set amount of fertilizer is supplied to the field.

After the trial delivery, the second fertilizing hose 72 is attached to the fertilizer supply section 63 . Thereby, a fertilizer supply path for conveying the fertilizer from the fertilizer tank 60 to the field is formed.

After that, when the button 203 for starting rice planting displayed on the information processing terminal 150b is touched, the fertilization amount adjusting motor 101 is controlled so that the rotation speed of the delivery unit 61a becomes the set rotation speed. Fertilizer is delivered from the delivery portion 61a and supplied to the field through the fertilizer supply path.

In addition, when executing variable fertilization that adjusts the amount of fertilizer supplied to the field according to the soil fertility of the field, based on the signals from the fertilizer concentration sensor 110, the depth sensor 111, and the water temperature sensor 112, The fertilizer application amount adjusting motor 101 is controlled to automatically change the rotation speed of the delivery portion 61a.

Further, when the button 202 for selecting the fertilizer reduction rate of the information processing terminal 150b is touched, the fertilizer application amount adjusting motor 101 is controlled according to the fertilizer reduction rate, and the rotational speed of the delivery unit 61a is automatically changed. .

Next, the feed amount setting control will be described using the flowchart of FIG. FIG. 8 is a flow chart for explaining the feeding amount setting control.

When the fertilizer application amount is input to the information processing terminal 150b (step S10) and the trial feeding amount is input (step S11), the information processing terminal 150b calculates the specific gravity (step S12).

Then, the information processing terminal 150b sets the rotational speed of the feeding portion 61a based on the calculated specific gravity and the amount of fertilizer applied (step S13).

Such setting of the feeding amount is performed at the start of work, for example, when the date and time of planting is changed, or when the fertilizer to be used is changed.

Next, the effects of this embodiment will be described.

The information processing terminal 150b calculates the specific gravity of the fertilizer based on the trial feeding amount, and sets the rotational speed of the feeding section 61a. The seedling transplanter 1 can supply a set amount of fertilizer to the field by supplying the fertilizer to the field based on the specific gravity of the fertilizer. Therefore, it is possible to suppress an increase in cost due to an increase in the amount of fertilizer applied and poor growth of crops due to excess or insufficient fertilizer.

The information processing terminal 150b also sets the rotation speed of the feeding portion 61a based on the specific gravity and the amount of fertilizer applied. As a result, it is possible to reduce the error in the amount of fertilizer applied to the field, and to suppress the increase in cost due to an increase in the amount of fertilizer applied and the poor growth of crops due to excessive fertilizer or insufficient fertilizer.

In addition, the information processing terminal 150b can suppress poor growth of crops due to excessive fertilizer or insufficient fertilizer by adjusting the rotational speed of the delivery unit 61a based on the soil fertility.

In addition, since the amount of fertilizer to be applied is set according to the size of the field and the type of fertilizer, fertilizer can be supplied to the field with an appropriate amount of fertilizer applied. Poor growth of crops due to excess or lack of fertilizer can be suppressed.

Next, a modification of the above embodiment will be described.

In the above-described embodiment, a pair of fertilizer tanks 60 are arranged on the left and right sides of the traveling vehicle body 2, but the present invention is not limited to this. The fertilizer tank may be a single tank extending in the left-right direction.

Also, the information processing terminal 150b has been described as being a tablet terminal, but is not limited to this. The information processing terminal 150b may be set on the running panel.

Also, the amount of trial feeding was measured by the operator. For example, the information processing terminal 150b uses the weight sensor 114 to calculate the weight before and after the trial feeding, and calculates the specific gravity based on the calculated value. Alternatively, the rotational speed of the feeding portion 61a may be set. As a result, for example, the operator can set the rotation speed of the delivery part 61a without attaching and detaching the second fertilizing hose 72 or measuring the trial delivery amount, thereby improving work efficiency. .

Further, when the button 203 for starting rice planting is touched, the information processing terminal 150b may store the calculated specific gravity. Then, when the field is moved and the button 203 for starting rice planting is touched again, the rotation speed of the delivery unit 61a may be set based on the stored specific gravity. As a result, when the field is moved and the same fertilizer is supplied to the field, it is possible to supply the set amount of fertilizer to the field without performing trial feed again, thereby improving work efficiency. can.

Alternatively, the specific gravity may be directly input to the information processing terminal 150b. For example, when the worker knows the specific gravity from the contents of the previous year's work, the rotation speed of the feeding unit 61a is set by directly inputting the specific gravity without performing trial feeding. Thereby, working efficiency can be improved. When the specific gravity is directly input to the information processing terminal 150b, the item for inputting the trial feeding amount may be left blank. Accordingly, the current work status can be easily confirmed by looking at the information processing terminal 150b.

Also, the trial feeding amount may be calculated based on the amount obtained from one second fertilizing hose 72 .

Note that the controller 150a may be composed of a plurality of controllers.

Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various changes may be made without departing from the spirit or scope of the general inventive concept defined by the appended claims and equivalents thereof.

1 seedling transplanter 4 seedling planting unit 5 fertilizing device 60 fertilizer tank (storage unit)
61 Feeding mechanism 61a Feeding unit 101 Fertilizer application amount adjusting motor 110 Fertilizer concentration sensor (sensor)
111 depth sensor (sensor)
112 water temperature sensor (sensor)
114 weight sensor 150 control device 150a controller 150b information processing terminal (information processing device)

Claims (4)

A fertilizing device for supplying fertilizer to a field, wherein the fertilizing device comprises a fertilizer tank, a feeding mechanism for feeding the fertilizer from the fertilizer tank, and a fertilizing hose for conveying the fertilizer from the feeding mechanism,
By rotating the delivery portion of the delivery mechanism a predetermined number of times, the fertilizer is delivered and guided to the fertilizer application hose. The weight of the fertilizer delivered by the trial delivery of the fertilizer applicator can be artificially measured, and the measured fertilizer is measured. An input device capable of setting a weight input and a fertilizer application amount, which is the weight of the fertilizer to be supplied to the field, is provided, and when the fertilizer is actually supplied to the field, the measured weight of the fertilizer is taken into account from the delivery unit. A work vehicle characterized by correcting a payout amount. 2. The work vehicle according to claim 1, wherein the fertilizing hose is detachable, and the fertilizing hose can be attached and detached from the lateral direction of the traveling vehicle body. The delivery mechanism includes a delivery portion that is rotatably supported, and is configured to rotate the delivery portion by a motor,
3. The work vehicle according to claim 1, wherein the rotation speed of the delivery unit is set based on the measured weight of the fertilizer and the amount of the applied fertilizer. The input device is provided on an operation panel of the traveling vehicle body,
The work vehicle according to any one of claims 1 to 3, wherein the input measured weight is stored, and when the work is restarted, the stored measured weight is used.

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