JP2020150909A - Chemical spray machine - Google Patents

Abstract

To provide a chemical spray machine capable of easily achieving a travel state in which a proper amount of chemical can be sprayed to a farm field.SOLUTION: There is provided a chemical spray machine for spraying a chemical while traveling, the machine comprises: a travel machine body; a spray nozzle which is mounted on the travel machine body and sprays a chemical to a farm field; a chemical tank which is mounted on the travel machine body for storing the chemical; a speed operation part which adjusts travel speed of the travel machine body by a manual operation; a pump for supplying the chemical to the spray nozzle; a display panel 30; and a control part for making the display panel 30 display the travel speed, and display a recommended speed range being a range of the travel speed at which, the prescribed spray amount of the chemical can be supplied from the spray nozzle and in which spray pressure can be adjusted.SELECTED DRAWING: Figure 6

Description

The present invention relates to a chemical sprayer that sprays chemicals while traveling.

The chemical sprayer includes an engine, a chemical tank, a pump, and a boom unit mounted on the traveling machine. The boom unit includes a plurality of spraying nozzles, and the drug stored in the drug tank is supplied to the spray nozzle via a pump, and the drug is sprayed from the spray nozzle to the field.

In addition, the chemical sprayer can spray the chemicals on the field while traveling, and can spray the chemicals while adjusting the amount of the chemicals to be sprayed per unit area of the field. At this time, the chemical sprayer controls the pump according to the traveling speed and adjusts the pressure for supplying the chemical from the chemical tank to the spray nozzle to adjust the amount of the chemical sprayed from the spray nozzle per unit time. To do. Specifically, as the traveling speed increases, the pressure of the pump is increased to increase the amount of the drug sprayed from the spray nozzle, and the amount of the drug sprayed per unit time during which the drug sprayer travels is increased. The amount of the drug sprayed from the spray nozzle per unit time (traveling a predetermined distance) is adjusted to a predetermined amount (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2008-178819

However, the spray nozzle has a fixed pressure range. Therefore, even if the spraying pressure is adjusted according to the traveling speed in order to adjust the amount of the drug to be sprayed per unit time to a predetermined amount, the spray nozzle may not be able to spray the amount of the drug corresponding to the pressure. .. That is, even if the pressure is adjusted to exceed the performance limit inherent in the spray nozzle, the actual spray amount of the chemical may not be able to spray the spray amount according to the pressure. As a result, if the traveling speed is too fast or too slow, even if the spraying pressure is adjusted, a predetermined amount of the drug cannot be sprayed per unit area.

In order to solve the above problems, it is an object of the present invention to easily realize a running state in which an appropriate amount of a drug can be sprayed on a field.

In order to achieve the above object, the drug sprayer according to the embodiment of the present invention is a drug sprayer that performs a drug spraying operation for spraying a drug while traveling, and is mounted on the traveling machine and the traveling machine. A spray nozzle for spraying chemicals on the field, a chemical tank mounted on the traveling machine to store the chemicals, a speed control unit for adjusting the traveling speed of the traveling machine by artificial operation, and the spray nozzle. The traveling speed at which a pump for supplying a drug, a display panel, and a traveling speed are displayed, and the spraying pressure is adjusted along with the traveling speed to supply a predetermined amount of the drug from the spray nozzle. It is provided with a control unit for displaying the recommended speed range, which is the range of the above, on the display panel.

With such a configuration, when traveling at a traveling speed within the recommended speed range, the supply amount of the chemical adjusted by the spraying pressure according to the traveling speed is within the range that the spraying nozzle can handle, and the spraying nozzle becomes The amount of drug sprayed is adjusted appropriately. Therefore, the passenger can easily spray the drug in a predetermined spraying amount only by adjusting the traveling speed so as to travel within the recommended speed range. In addition, by displaying the recommended speed range along with the running speed on the display panel, it is possible to recognize at a glance the running speed suitable for performing the chemical spraying work, and spray an appropriate amount of the chemical in the field. It is possible to travel while easily adjusting to the traveling speed that can be achieved.

Further, it is preferable to include a spray amount input unit for inputting the spray amount, and the control unit preferably changes the recommended speed range according to the spray amount.

With such a configuration, an appropriate recommended speed range is displayed according to the desired spraying amount, so that it is possible to easily travel at a more appropriate traveling speed according to the spraying amount.

Further, the display panel can display the input amount of spraying and the traveling speed by switching, and it is preferable that the amount of spraying is input by a switch box.

With such a configuration, it is necessary to provide a plurality of display panels because the traveling speed and the input spray amount can be switched and displayed on one display panel and the operation of inputting the spray amount can be performed by the switch box. The number of parts can be reduced, and the placement space can be optimized to improve the visibility of the displayed information.

Further, it is preferable to include a nozzle type input unit for inputting the type of the mounted spray nozzle, and the control unit preferably changes the recommended speed range according to the type of the spray nozzle.

There are a plurality of spraying nozzles having a different range of spraying amount per unit time that can be sprayed, and the chemical sprayer may use and mount these spraying nozzles properly depending on the situation. At this time, the spraying pressure at which the desired spraying amount of the drug can be sprayed by the spray nozzle is also different depending on the spray nozzle. As a result, the recommended speed range in which proper spraying can be performed also depends on the spray nozzle installed. In this way, even if the spraying nozzles are switched, the recommended speed range corresponding to the spraying nozzles can be displayed, and the drug can be more easily sprayed in a predetermined spraying amount.

Further, the display panel has a plurality of first indicators and a second indicator arranged side by side with the plurality of first indicators, and the number of the first indicators is as many as the number corresponding to the traveling speed. The recommended speed range may be displayed by lighting the second indicator adjacent to the first indicator that lights when the traveling speed is within the recommended speed range.

With such a configuration, the current running speed and the recommended speed range are displayed in association with each other, so it is possible to determine whether the running speed should be maintained or the running speed needs to be changed. It is possible to travel more easily at a traveling speed that can be easily recognized and that an appropriate amount of the drug can be sprayed on the field.

Further, the first indicators may be arranged in an arc shape.

With such a configuration, it becomes easy to visually image the current traveling speed, and it is possible to travel more easily at a traveling speed at which an appropriate amount of chemicals can be sprayed on the field.

Further, the control unit includes a switch for operating the start and stop of the operation of the pump and a state acquisition unit for acquiring the working state, and the control unit sprays the drug according to the working state at the start of the operation of the pump. It is preferable to control the work.

At the start of the chemical spraying work, there are certain restrictions on various work situations, and if the chemical spraying work is performed outside the limits, the appropriate chemical spraying work may not be performed. At the start of the chemical spraying work, by appropriately controlling the chemical spraying work according to the work situation, it is possible to suppress the occurrence of work defects in the chemical spraying work.

Further, the working state is the traveling speed of the traveling machine body, and the control unit may control the chemical spraying operation depending on whether or not the traveling speed is within a predetermined speed range.

If the traveling speed at the start of the chemical spraying work is too fast, the chemical sprayer may break down or the chemical spraying work may become poor. Therefore, by controlling the chemical spraying work according to the traveling speed at the start of the chemical spraying work, the chemical spraying work can be started at an appropriate traveling speed, and a failure of the chemical sprayer or a work failure of the chemical spraying work occurs. It can be suppressed.

Further, the working state is the operating state of the speed operation unit, and the control unit may control the chemical spraying operation depending on whether or not the speed operating unit is in a predetermined operating state.

The chemical spraying operation may be restricted so that the operation state of the speed control unit is performed in a predetermined state. By controlling so that the agent spraying operation is performed when the speed operation unit is in a predetermined operation state, the chemical spraying operation can be performed only when the speed operation unit is in an appropriate operation state, and the chemical spraying operation can be performed. It is possible to suppress the occurrence of work defects. For example, the traveling speed may be controlled between the working speed and the moving speed by a speed control unit such as an auxiliary transmission, and if the chemical spraying work is not performed at the working speed, the chemical spraying work cannot be properly performed. In this case, by performing the chemical spraying operation only when the speed operation unit is operated at the working speed, it is possible to suppress the occurrence of work defects in the chemical spraying operation.

Further, the pump is provided with a prime mover, the pump is driven by the prime mover, the working state is the rotation speed of the prime mover, and the control unit determines whether or not the rotation speed is within a predetermined rotation speed range. The drug spraying operation may be controlled.

The pump is driven by a prime mover such as an engine. If the chemical spraying operation is started when the rotation speed of the prime mover does not reach the required rotation speed, the pump cannot supply the chemical at the desired pressure, the chemical to be sprayed from the spray nozzle is insufficient, and the appropriate chemical is applied. Spraying work may not be possible. Therefore, by controlling the chemical spraying work according to the rotation speed of the prime mover at the start of the chemical spraying work, the pump operates properly from the start of the chemical spraying work, and a work failure of the chemical spraying work occurs. It can be suppressed.

Further, the working state is the rotation speed of the pump drive shaft that drives the pump, and the control unit controls the chemical spraying operation depending on whether or not the rotation speed of the pump drive shaft is a predetermined rotation speed. You may.

The controllable range of spray pressure is limited by the pressure of the pump. The pressure of the pump is determined by the number of revolutions of the pump drive shaft. Therefore, the range in which the spraying pressure can be controlled is determined by the rotation speed of the pump drive shaft. From this, it is possible to suppress the occurrence of work defects in the chemical spraying work by controlling the chemical spraying work to be performed only when the rotation speed of the pump drive shaft is appropriate.

In addition, the control unit may issue a warning to urge the chemical spraying operation to be performed in the predetermined working state when the working state is not the predetermined one.

In this way, if the running speed at the start of the chemical spraying work is too fast, or if the working condition is inappropriate, such as when the rotation speed of the prime mover is insufficient at the start of the chemical spraying work, a warning to that effect is given. Since the passenger can control to start the chemical spraying work after the working conditions such as the running speed and the rotation speed of the prime mover become appropriate, the chemical sprayer may be out of order or the chemical spraying work may be defective. It can be suppressed from occurring.

Further, the control unit may stop the traveling machine body when it is not in a predetermined working state.

When the traveling speed at the start of the chemical spraying work is too fast, or when the rotation speed of the prime mover is insufficient at the start of the chemical spraying work, the traveling machine is stopped. As a result, if the traveling speed and the rotation speed of the prime mover are not appropriate, the chemical spraying work cannot be started, so that it is possible to prevent a situation in which the chemical sprayer fails or the chemical spraying work fails. Can be done.

Further, the control unit may control the traveling speed within the predetermined speed range when the traveling speed is not within the predetermined speed range.

With such a configuration, it is possible to start the chemical spraying operation after setting the traveling speed to an appropriate speed, and it is possible to suppress the occurrence of failure of the chemical sprayer or work failure of the chemical spraying operation.

Further, the control unit may control the speed operation unit so as to be in a predetermined operation state when the speed operation unit is not in a predetermined operation state.

With such a configuration, it is possible to start the chemical spraying operation after the speed operation unit is in an appropriate operating state, and it is possible to suppress the occurrence of failure of the chemical sprayer or work failure of the chemical spraying operation. ..

Further, the control unit may control the rotation speed within the range of the predetermined rotation speed when the rotation speed is not within the range of the predetermined rotation speed.

With such a configuration, the chemical spraying operation can be started after the rotation speed of the prime mover is set to an appropriate rotation speed, and it is possible to suppress the occurrence of work defects in the chemical spraying operation.

Further, the control unit may control the rotation speed of the pump drive shaft to be a predetermined rotation speed when the rotation speed of the pump drive shaft is not a predetermined rotation speed.

With such a configuration, it is possible to start the chemical spraying work after setting the rotation speed of the pump drive shaft to an appropriate rotation speed, and it is possible to suppress the occurrence of failure of the chemical sprayer or work failure of the chemical spraying work. be able to.

Further, the control unit may give a predetermined warning when the spraying pressure is continuously equal to or less than a predetermined value for a predetermined time during the operation of the pump.

When the remaining amount of the medicine stored in the medicine tank becomes low, the pump cannot supply a predetermined amount of medicine, and the pressure of the pump drops. If such a situation continues, the pump may be seized and cause a failure. In addition, when the chemical is insufficient or the pump is out of order, proper chemical spraying work cannot be performed. Therefore, when the spraying pressure continues to be reduced for a predetermined time, a warning is given and the drug is replenished, so that the appropriate drug spraying work can be continued.

Further, the control unit may stop the pump when the spraying pressure continues for a predetermined time and is equal to or less than a predetermined value during the operation of the pump.

With such a configuration, when the spraying pressure continues to be reduced for a predetermined time, it is possible to avoid a situation in which an appropriate chemical spraying operation cannot be performed by stopping the pump.

It is a side view of a boom sprayer. It is a top view of the boom sprayer. It is a front view of a boom sprayer. It is a top view which illustrates the structure of the axle unit. It is a figure which illustrates the structure of the front panel. It is a figure which illustrates the structure of the display panel which displays the speed. It is a figure which illustrates the structure of the display panel which displays the spray amount setting status. It is a figure which illustrates the structure of the display panel which displays the spraying nozzle selection screen. It is a block diagram explaining the configuration example which controls the drug spraying work.

[Basic configuration of chemical sprayer]
As an example of the chemical sprayer (passenger type management machine) according to the present invention, a boom sprayer with a cabin is shown in FIGS. 1 to 3. The boom sprayer is provided with a traveling machine body C having a body frame 1, a pair of left and right front wheels 2 and 2, and a pair of left and right rear wheels 3 and 3. Axle units 4F and 4B are connected to the front and rear parts of the lower part of the fuselage frame 1, and the axle units 4F and 4B extend to the left and right of the fuselage. The front wheels 2 and 2 are rotatably supported on the left and right ends of the axle unit 4F at the front, and the rear wheels 3 and 3 are rotatably supported at the left and right ends of the axle unit 4B at the rear. The front wheels 2 and 2 and the rear wheels 3 and 3 can rotate around the horizontal axis. Further, the left and right end portions of the axle units 4F and 4B each extend downward, and the portions extending downward can rotate around the vertical axis. As a result, the front wheels 2 and 2 and the rear wheels 3 and 3 are configured to be capable of four-wheel steering.

The engine E (corresponding to the prime mover), the bonnet 6, the cabin 7, the drug tank 8, the boom unit 9, and the broadcaster 10 are supported side by side on the airframe frame 1. The engine E and the bonnet 6 are provided at the front portion of the traveling machine body C, and the bonnet 6 covers the engine E from above. The bonnet 6 is configured to swing around the lateral axis of the machine body with the rear upper end as the axis.

The speed change mechanism 11 is supported at a position corresponding to the lower part of the cabin 7 in the airframe frame 1. The power of the engine E is distributed to the front and rear axle units 4F and 4B via the transmission mechanism 11, and is transmitted to the front wheels 2 and 2 and the rear wheels 3 and 3, respectively.

The cabin 7 is provided behind the bonnet 6 and the engine E, and the cabin 7 is located at the center left and right of the traveling machine body C. A windshield 12 is provided on the front surface of the cabin 7, and a door 13 that can be opened and closed is provided on the left side of the cabin 7. A boarding space is formed inside the cabin 7 so that passengers can board. A driver's seat 14 and a front panel 15 are provided in this boarding space. The driver's seat 14 is provided in the central portion of the traveling machine C, and is configured so that the passenger can take a seat. The front panel 15 is provided in the central portion of the traveling machine body C, and is located in front of the driver's seat 14 and behind the windshield 12.

The front panel 15 is provided with a display panel 30 on which the traveling speed and various information are displayed. Further, the front panel 15 is provided with a switch box 31 that performs various setting processes and control processes. Further, around the driver's seat 14 such as the front panel 15, there are steering handles 16 and various operating tools 32 such as a main speed change lever (corresponding to a speed control part) and an auxiliary speed change lever (corresponding to a speed control part). Is provided. The steering handle 16 is configured so that the front wheels 2 and 2 and the rear wheels 3 and 3 can be steered by human operation. The forward / backward movement switching operation and the traveling speed change operation of the traveling machine body C can be performed, for example, by operating the operating tools 32 such as the main shift lever and the auxiliary shift lever, and the boom unit 9 and the broadcaster 10 can be operated by other operations. This is possible with the tool 32.

A deck portion 17 is provided on the left side of the machine body with respect to the door 13, and a step 18 extends downward from the rear portion of the deck portion 17 on the lateral outer side of the machine body. A hinge is provided at the front end of the door 13. The door 13 is configured to swing around the vertical axis, and the rear portion of the door 13 is on the free end side. The occupant can enter the boarding space by climbing step 18 to stand at the rear of the deck portion 17 and opening the door 13.

The drug tank 8 is provided adjacent to the rear of the cabin 7. The left and right side portions of the medicine tank 8 extend to the position of the rear portion of the door 13 among the left and right side portions in the rear portion of the cabin 7. Therefore, the medicine tank 8 is formed in a U shape in a plan view, and the shape of the medicine tank 8 is formed so as to surround the rear portion of the cabin 7.

The boom unit 9 includes an elevating link mechanism 19, a rolling mechanism 20, a center boom 21, and a pair of left and right side booms 22L and 22R. The elevating link mechanism 19 is located in front of the engine E and the bonnet 6, and the elevating link mechanism 19 has a first hydraulic cylinder 23 facing up and down.

The piston rod of the first hydraulic cylinder 23 is located below the first hydraulic cylinder 23, and the first hydraulic cylinder 23 is a single rod type cylinder. A piston portion is provided at the upper end of the piston rod. The cylinder chamber of the first hydraulic cylinder 23 is divided into two upper and lower cylinder chambers with a piston portion interposed therebetween. Of the first hydraulic cylinder 23, the cylinder chamber below the piston portion is the cylinder chamber on the rod side, and the cylinder chamber above the piston portion is the cylinder chamber on the cap side. The first hydraulic cylinder 23 is configured to be expandable and contractible by sliding the rod up and down with respect to the cylinder body of the first hydraulic cylinder 23. The elevating link mechanism 19 is configured to be vertically elevated by the expansion and contraction operation of the first hydraulic cylinder 23.

The rolling mechanism 20 is supported by the free end of the elevating link mechanism 19, and the center boom 21 and the pair of side booms 22L and 22R are supported by the rolling mechanism 20. The longitudinal direction of the center boom 21 is arranged sideways on the machine body. The left and right side booms 22L and 22R are pivotally supported at both ends in the longitudinal direction of the center boom 21. Second hydraulic cylinders 24L and 24R are provided at the pivotal support points at both ends of the center boom 21 in the longitudinal direction.

Piston rods are provided in each of the second hydraulic cylinders 24L and 24R. Each of the second hydraulic cylinders 24L and 24R is a single rod type cylinder. One end of the piston rod in the second hydraulic cylinder 24R on the right side of the machine body and the vicinity of the pivot point of the side boom 22R on the right side of the machine body are pivotally supported. Further, one end of the piston rod in the second hydraulic cylinder 24L on the left side of the machine body and the vicinity of the pivot point of the side boom 22L on the left side of the machine body are pivotally supported. A piston portion is provided at the other end of the piston rod (the end opposite to the side where the side booms 22L and 22R are located) in each of the second hydraulic cylinders 24L and 24R. The cylinder chambers of the second hydraulic cylinders 24L and 24R are divided into two cylinder chambers with a piston portion interposed therebetween. Of the second hydraulic cylinders 24L and 24R, the cylinder chamber on the side where the rod portion is located is inside the cylinder chamber on the rod side, and the cylinder on the side opposite to the side where the rod portion is located is opposite to the piston portion. The room is the cylinder room on the cap side. The piston rod slides with respect to the cylinder bodies of the second hydraulic cylinders 24L and 24R, so that the second hydraulic cylinders 24L and 24R can be expanded and contracted. The left and right side booms 22L and 22R can be swung by the expansion and contraction operation of these second hydraulic cylinders 24L and 24R.

When the second hydraulic cylinder 24L is extended, the side boom 22L extends laterally to the same direction as the center boom 21. In this case, the side boom 22L extends laterally outward of the traveling machine body C. When the second hydraulic cylinder 24L contracts, the side boom 22L is folded in a state of being inclined backward. As in the case of the side boom 22L, the side boom 22R extends laterally when the second hydraulic cylinder 24R extends. Further, when the second hydraulic cylinder 24R contracts, the side boom 22R is folded in a state of being inclined backward. The side booms 22L and 22R are tilted upward, and the free end of the side booms 22L and 22R is located at a position corresponding to the rear end of the traveling aircraft C in the front-rear direction, and the cabin 7 is located in the vertical direction. It is located below the top edge.

A drug supply pipe 25 is provided along the longitudinal direction in each of the center boom 21 and the pair of side booms 22L and 22R, and the drug supply pipe 25 is provided with a large number of spray nozzles 26. Further, a spraying pump 27 (corresponding to a pump) is supported below the driver's seat 14 in the machine frame 1, and the spraying pump 27 directs the liquid drug stored in the drug tank 8 toward the drug supply pipe 25. It is configured to be able to discharge.

When spraying the chemicals, the passenger extends the pair of left and right side booms 22L and 22R sideways to drive the spraying pump 27 based on the power of the engine E. The power of the engine E is input to the pump drive shaft (not shown) via a predetermined speed change mechanism 11 or the like, and is input to the spraying pump 27 from the pump drive shaft (not shown). As a result, the liquid drug stored in the drug tank 8 is sprayed from a large number of spray nozzles 26 through the drug supply pipe 25. In this state, the traveling machine C travels in the field by the rotational drive of the front wheels 2 and 2 and the rear wheels 3 and 3, and the chemicals are sprayed on the field.

Further, when the chemical is not sprayed, the passenger folds the pair of left and right side booms 22L and 22R in the rearward upward direction. As a result, when the boom sprayer travels on a farm road or is parked in a barn for storage, the possibility that the free ends of the side booms 22L and 22R come into contact with other objects is reduced.

[Axle unit configuration]
FIG. 4 shows a plan view of the axle units 4F and 4B and the transmission mechanism 11. The front wheel central transmission case 41F is provided at the left and right center points on the axle unit 4F, and the front wheel central transmission shaft 42F is provided inside the front wheel central transmission case 41F. The front wheel central transmission shaft 42F is an axle capable of rotationally driving a pair of left and right front wheels 2 and 2. A rear wheel central transmission case 41B is provided at the left and right central positions of the axle unit 4B, and a rear wheel central transmission shaft 42B is provided inside the rear wheel central transmission case 41B. The rear wheel central transmission shaft 42B is an axle capable of rotationally driving a pair of left and right rear wheels 3, 3. The front transmission shaft 11F and the rear transmission shaft 11R extend in the front-rear direction from the transmission mechanism 11 on the same axis as the output shaft of the transmission mechanism 11. Although not described in detail, a known operating mechanism is provided for each of the front wheel central transmission shaft 42F and the rear wheel central transmission shaft 42B. The front transmission shaft 11F extends from the speed change mechanism 11 to the front front wheel central transmission case 41F, and the gear at the front end of the front transmission shaft 11F engages with the operating mechanism of the front wheel central transmission shaft 42F. Further, the rear transmission shaft 11R extends from the speed change mechanism 11 to the rear rear wheel central transmission case 41B, and the gear at the rear end of the rear transmission shaft 11R engages with the operating mechanism of the rear wheel central transmission shaft 42B. With such a configuration, the power of the engine E (see FIG. 1) is distributed to the front and rear axle units 4F and 4B via the transmission mechanism 11, and is distributed to the front wheels 2 and 2 and the rear wheels 3 and 3, respectively. Be transmitted. Further, the rear transmission shaft 11R is provided with a rotation sensor 28 for measuring the rotation speed of the rear transmission shaft 11R. The rotation sensor 28 includes a gear that rotates with the rotation of the rear transmission shaft 11R, and a sensor that counts the number of gear teeth that pass through a fixed position with the rotation. The rotation sensor 28 can detect the rotation speed of the rear transmission shaft 11R from the number of teeth counted per unit time, and calculate the rotation speed and running speed of the engine E (see FIG. 1). The rotation sensor 28 is not limited to the rear transmission shaft 11R, but may be provided on the front transmission shaft 11F, the front wheel central transmission shaft 42F, or the rear wheel central transmission case 41B.

[Front panel configuration]
As shown in FIG. 5, the front panel 15 starts the display panel 30, the switch box 31, and the chemical spraying work around the steering handle 16, in addition to the main shift lever 32a and the auxiliary shift lever 32b, which are the operating tools 32. A pump switch 29 (corresponding to a switch) for starting or stopping the operation of the spraying pump 27 (see FIG. 1) is provided. The main shift lever 32a and the auxiliary shift lever 32b, which are the operating tools 32, are used when adjusting the traveling speed. The display panel 30 displays a running speed, various warnings, a running state, a working state, setting information, and the like. The switch box 31 includes switches for performing various settings and operations in traveling and chemical spraying work. The display panel 30 and the switch box 31 are arranged at positions where the steering handle 16 does not obstruct the visibility and at a position where they can be easily seen during traveling or chemical spraying work.

For example, as shown in FIG. 6, the display panel 30 displays a traveling speed display 33 indicating a traveling speed. Further, the chemical sprayer can perform vehicle speed interlocking control that automatically adjusts the spray amount of the chemical according to the traveling speed so that a predetermined amount of the chemical is sprayed per unit area of the field. In this case, in addition to the traveling speed display 33, the display panel 30 can also display information on whether or not vehicle speed interlocking control is in progress, information on the amount of chemicals sprayed per unit area, and the like.

Further, the spray nozzle 26 (hereinafter, both of which refer to FIG. 2) has a determined range of the amount of the drug that can be sprayed per unit time. Therefore, the range of the traveling speed at which a predetermined amount of the chemical can be sprayed per unit area of the field is determined during the vehicle speed interlocking control. Therefore, the display panel 30 may display the recommended speed display 34 that displays the recommended speed range in which the vehicle speed interlocking control can be appropriately performed together with the traveling speed display 33. By displaying the recommended speed display 34 during the vehicle speed interlocking control, the passenger can operate the operating tools 32 (see FIG. 5) such as the main speed change lever 32a (see FIG. 5) and the auxiliary speed change lever 32b (see FIG. 5). A predetermined amount of the drug can be sprayed per unit area of the field only by operating so that the traveling speed is within the recommended speed range indicated by the recommended speed display 34.

The traveling speed display 33 may be configured to display the traveling speed according to the number of a plurality of indicators 35 (corresponding to the first indicator) arranged in an arc shape lit in order from the end, for example. In such a case, it is preferable that the recommended speed display 34 is provided at a position adjacent to the indicator 35 that is lit at the traveling speed corresponding to the recommended speed range. The recommended speed display 34 can also be an indicator (corresponding to the second indicator). By displaying the traveling speed with a plurality of indicators 35 arranged in an arc shape, the traveling speed can be easily visually recognized. Further, since the recommended speed display 34 is displayed adjacent to the running speed display 33, it becomes easy to recognize whether or not the work running is performed at an appropriate running speed, and even if the running speed is not appropriate, It becomes easier to recognize how much speed adjustment is necessary, and it becomes easy to perform the drug spraying work at an appropriate speed and spray an appropriate amount of the drug.

Further, the amount of the chemicals per unit area sprayed during the vehicle speed interlocking control can be set to an arbitrary amount by the switch box 31 (hereinafter, refer to FIG. 5) or the like. In this case, for example, the setting information as illustrated in FIG. 7 can be displayed by switching from the display such as the traveling speed shown in FIG. In the example shown in FIG. 7, the display panel 30 has a vehicle speed interlocking display 36 indicating whether or not the vehicle speed interlocking control is in progress, a spraying amount set value 37 indicating the amount of the drug to be sprayed per set unit area, and for spraying. A pressure value 38 indicating the spraying pressure of the pump 27 (see FIG. 1) is displayed. By switching the display of the display panel 30 to display the set value set in the switch box 31 in this way, it is not necessary to separately provide a display panel for displaying the set value, the number of parts can be reduced, and visual recognition is possible. The information of the set value can be displayed on the highly likely display panel 30. The display range of the recommended speed display 34 (hereinafter, refer to FIG. 6) changes according to the amount of the drug sprayed per unit area set in this way.

Further, the chemical sprayer can change the spray nozzle 26 to be mounted. As described above, the spray nozzles 26 have different amounts of chemicals that can be sprayed per unit time, and the recommended speed range also differs for each spray nozzle 26. Therefore, in the case of a chemical sprayer in which the spray nozzle 26 can be changed, it is necessary to make the chemical sprayer recognize the type of the spray nozzle 26 in order to display an appropriate recommended speed display 34. Therefore, it is preferable that the switch box 31 includes a selection switch for the spray nozzle 26, and the display panel 30 displays the selection screen for the spray nozzle 26. For example, the display panel 30 displays a selection screen for the spray nozzle 26 as shown in FIG. In the example shown in FIG. 8, the display panel 30 is displayed so that two types of spray nozzles 26 can be selected, a conical mist nozzle and a fan-shaped mist nozzle. The switch box 31 can select one from the two types of spray nozzles 26 displayed, and the display panel 30 can indicate which spray nozzle 26 is selected. For example, the selected spray nozzle 26 is indicated by discoloring / lighting the line surrounding the selected spray nozzle 26, or discoloring / lighting the characters of the selected spray nozzle 26 and its surroundings.

By inputting the type of the spray nozzle 26 mounted in this way, the recommended speed display 34 corresponding to the mounted spray nozzle 26 can be displayed on the display panel 30. Further, as shown in FIG. 7, when the amount of the chemical sprayed per unit area is set, it is recommended according to the type of the mounted spray nozzle 26 and the set amount of the chemical sprayed per unit area. The speed display 34 is displayed on the display panel 30. As a result, a more appropriate recommended speed display 34 is displayed on the display panel 30, and the traveling speed for appropriately performing the chemical spraying operation can be easily operated.

[Control of chemical spraying work]
As shown in FIG. 9, in order to control the chemical spraying operation, the chemical sprayer has a state acquisition unit 50, a pump operation input unit 51, a spray amount input unit 52, a nozzle type input unit 53, and a control unit. It includes 54. These are realized by hardware such as a processor, each of which may be composed of one or a plurality of functional parts, or may be arbitrarily combined with each other and composed of one or a plurality of functional parts. Further, these functions may be realized by software, and in this case, a program stored in a storage device (not shown) is executed by a processor such as a control unit 54.

The state acquisition unit 50 receives the detection result from the rotation sensor 28. The state acquisition unit 50 calculates the rotation speed and running speed of the engine E from the received information, and transmits the work state to the control unit 54. The pump operation input unit 51 acquires the input state of the pump switch 29 and the pressure (spraying pressure) at which the spraying pump 27 supplies the drug, and transmits this information to the control unit 54. From the input state of the pump switch 29, it is possible to know the timing when the spraying pump 27 is started or stopped, and it is possible to determine whether or not the spraying pump 27 is operating and the drug spraying operation is in progress. ..

The spray amount input unit 52 acquires the spray amount of the drug per unit area set in the switch box 31 and transmits it to the control unit 54. The nozzle type input unit 53 acquires the type of the spray nozzle 26 to be mounted, which is selected by the switch box 31, and transmits it to the control unit 54.

The control unit 54 calculates the recommended speed range from at least one of the set value of the spray amount of the medicine per unit area received and the information regarding the type of the spray nozzle 26 to be mounted. Further, the control unit 54 controls the chemical spraying work according to the recommended speed range, the working state, and the like.

Specifically, the control unit 54 includes a state determination unit 55, a recommended speed range calculation unit 56, and a work control unit 57. The recommended speed range calculation unit 56 is based on, for example, a set value of the amount of chemicals sprayed per unit area received from the spray amount input unit 52 and the type of the mounted spray nozzle 26 received from the nozzle type input unit 53. To calculate the recommended speed range.

The state determination unit 55 of the control unit 54 first detects that the spraying pump 27 has started operation from the information received from the pump operation input unit 51. At the start of the operation of the spraying pump 27, the state determination unit 55 determines the work state calculated by the state acquisition unit 50, and determines whether or not control according to the work state is necessary for performing the chemical spraying work. .. Specifically, the state determination unit 55 includes a storage unit 55a, and the storage unit 55a stores limit values such as a traveling speed and a rotation speed necessary for appropriately starting the operation of the spraying pump 27. .. Then, the state determination unit 55 compares the work state received from the state acquisition unit 50 with the limit value stored in the storage unit 55a at the start of the operation of the spraying pump 27, and sends the comparison result to the work control unit 57. Send. For example, when the working state is the traveling speed, the upper limit value and the lower limit value of the traveling speed required to appropriately start the operation of the spraying pump 27 as the limit value are stored in the storage unit 55a, and the received traveling speed is stored. If is not within the limit value range, the state determination unit 55 determines that a predetermined control is required as a comparison result. Further, when the working state is the rotation speed of the engine E, the upper limit value and the lower limit value of the rotation speed of the engine E required to appropriately start the operation of the spraying pump 27 as a limit value are stored in the storage unit 55a. If the received rotation speed is not within the limit value range, the state determination unit 55 determines that a predetermined control is required as a comparison result. Further, when the working state is the operating state of the auxiliary shifting lever 32b and the received operating state of the auxiliary shifting lever 32b is not the working speed, the state determining unit 55 determines that a predetermined control is necessary as a comparison result. .. Further, when the working state is the rotation speed of the pump drive shaft, the upper limit value and the lower limit value of the rotation speed of the pump drive shaft required to appropriately start the operation of the spraying pump 27 as the limit value are stored in the storage unit 55a. If the number of rotations received is not within the limit value range, the state determination unit 55 determines that a predetermined control is required as a comparison result.

The work control unit 57 of the control unit 54 controls the chemical spraying work based on the recommended speed range calculated by the recommended speed range calculation unit 56 and the determination result of the state determination unit 55. For example, the work control unit 57 controls the recommended speed display 34 displayed on the display panel 30 according to the calculated recommended speed range. Further, the work control unit 57 can automatically control the engine E and the speed change mechanism 11 so as to travel at a traveling speed within the recommended speed range based on the calculated recommended speed range.

In addition, when the state determination unit 55 determines that the traveling speed is not within the limit value range at the start of the operation of the spraying pump 27, the work control unit 57 adjusts the display panel 30 to an appropriate traveling speed. You may display a warning prompting you to do so, stop the running, or control the engine E and the speed change mechanism 11 to adjust the running speed to an appropriate level. The control of such chemical spraying work may be performed in order of warning, running stop, and adjustment to an appropriate running speed, and may be selected in advance or selected at any time by the switch box 31. Either one may be selectively performed. The traveling speed may be adjusted to a moving speed and a working speed by the auxiliary transmission lever 32b. The chemical spraying work needs to be performed at a working speed. Therefore, at the start of operation of the spraying pump 27, the state determination unit 55 reads the state of the auxiliary transmission lever 32b via the state acquisition unit 50, and determines whether the movement speed is set or the working speed is set. You may. Then, when it is determined that the moving speed is set, the work control unit 57 warns that the work speed should be changed, controls the running speed to be automatically changed to the work speed, and the like. Is also good.

When the state determination unit 55 determines that the rotation speed of the engine E is not within the limit value range at the start of the operation of the spraying pump 27, the work control unit 57 displays the appropriate rotation speed on the display panel 30. You may display a warning prompting you to make adjustments, stop running, or control the engine E to adjust to an appropriate rotation speed.

Further, when the state determination unit 55 determines that the rotation speed of the pump drive shaft is not within the limit value range at the start of the operation of the spraying pump 27, the work control unit 57 causes the display panel 30 to rotate appropriately. A warning may be displayed prompting the user to adjust the number, the running may be stopped, or the pump drive shaft may be controlled to adjust the number to an appropriate value. The control of such chemical spraying work may be performed in order of warning, running stop, and adjustment to an appropriate rotation speed, and may be selected in advance or selected at any time by the switch box 31. Either one may be selectively performed.

As described above, when the working conditions such as the running speed and the rotation speed of the engine E are not within the appropriate range, the chemical sprayer may be out of order by performing warning, running stop, adjusting the running speed and the rotation speed, etc. At the same time, it is suppressed that the chemical spraying work is performed in an inappropriate working state, and the inappropriate chemical spraying work is suppressed.

Further, if the remaining amount of the chemicals stored in the chemical tank 8 (hereinafter, refer to FIG. 1) is insufficient during the operation of the spraying pump 27, the spraying pump 27 may be seized and malfunction. Therefore, the state determination unit 55 acquires the pressure (spraying pressure) of the spraying pump 27 over time via the pump operation input unit 51, and determines a predetermined time or more during the operation of the spraying pump 27 or at the start of the operation. It is determined whether or not the state below the pressure of is continuing. Then, when the state determination unit 55 determines that the pressure of the spraying pump 27 continues to be in a state of the predetermined pressure or less for a predetermined time or more, the work control unit 57 replenishes the medicine tank 8 with the medicine. A warning can be displayed on the display panel 30, and the operation of the spraying pump 27 can be controlled to be stopped. In this way, by detecting that the chemicals stored in the chemical tank 8 are insufficient due to the pressure of the spraying pump 27 and issuing a warning or stopping the spraying pump 27, the spraying pump 27 is seized and malfunctions. It is possible to suppress the pumping and prevent the chemical spraying work from becoming inoperable.

In the above description, the spraying pressure is the pressure of the spraying pump 27 as an example, but the spraying pressure for adjusting the amount of the drug sprayed from the spraying nozzle 26 to a predetermined amount is the spraying pressure from the drug supply pipe 25. It may be the pressure of the drug supplied to 26. In this case, a valve (not shown) is provided in the drug supply pipe 25, and the spraying pressure is adjusted by the valve (not shown). A pressure sensor (not shown) is provided in the flow path of the medicine between the valve (not shown) of the medicine supply pipe 25 and the spray nozzle 26, and the spray pressure is detected by the pressure sensor, and the place from the spray nozzle 26. A valve (not shown) is adjusted to adjust the spray pressure so that a fixed amount of drug is sprayed. Further, the spraying pressure may be adjusted by both adjusting the pressure of the spraying pump 27 and adjusting the valve (not shown).

The chemical sprayer of the present invention is not limited to the configuration in which the boom is provided with a plurality of spray nozzles, and can be applied to various chemical sprayers that spray chemicals while traveling.

8 Chemical tank 26 Spray nozzle 27 Spray pump (pump)
29 Pump switch (switch)
30 Display panel 31 Switch box 32 Operation tool (speed operation unit)
50 Status acquisition unit 52 Spray amount input unit 53 Nozzle type input unit 54 Control unit C Traveling machine E engine (motor)

Claims (19)

It is a chemical sprayer that sprays chemicals while driving.
With the traveling aircraft
A spray nozzle mounted on the traveling machine to spray chemicals on the field,
A drug tank mounted on the traveling machine and storing the drug,
A speed control unit that adjusts the running speed of the traveling machine by artificial operation,
A pump that supplies the drug to the spray nozzle,
Display panel and
The display panel displays a recommended speed range, which is a range of the running speed at which the running speed can be displayed and a predetermined amount of the drug can be supplied from the spray nozzle by adjusting the spraying pressure along with the running speed. A chemical sprayer equipped with a control unit for displaying on. A spray amount input unit for inputting the spray amount is provided.
The drug sprayer according to claim 1, wherein the control unit changes the recommended speed range according to the spray amount. The display panel can switch between the input spraying amount and the traveling speed and display the display panel.
The chemical sprayer according to claim 2, wherein the spray amount is input by a switch box. A nozzle type input unit for inputting the type of the mounted spray nozzle is provided.
The chemical sprayer according to any one of claims 1 to 3, wherein the control unit changes the recommended speed range according to the type of the spray nozzle. The display panel has a plurality of first indicators and a second indicator arranged side by side with the plurality of first indicators.
The first indicator lights up in order according to the traveling speed, and the first indicator lights up in order.
The recommended speed range is any one of claims 1 to 4, which is displayed by lighting the second indicator adjacent to the first indicator that lights when the traveling speed is within the recommended speed range. The drug sprayer according to paragraph 1. The chemical sprayer according to claim 5, wherein the first indicator is arranged in an arc shape. A switch that operates the start and stop of the operation of the pump,
Equipped with a status acquisition unit that acquires the working status
The chemical sprayer according to any one of claims 1 to 6, wherein the control unit controls the chemical spraying operation according to the working state at the start of the operation of the pump. The working state is the traveling speed of the traveling machine.
The drug sprayer according to claim 7, wherein the control unit controls the drug spraying operation depending on whether or not the traveling speed is within a predetermined speed range. The working state is the operating state of the speed operation unit.
The drug sprayer according to claim 7, wherein the control unit controls the drug spraying operation depending on whether or not the speed control unit is in a predetermined operating state. Equipped with a prime mover
The pump is driven by the prime mover
The working state is the rotation speed of the prime mover.
The chemical sprayer according to claim 7, wherein the control unit controls the chemical spraying operation depending on whether or not the rotation speed is within a predetermined rotation speed range. The working state is the rotation speed of the pump drive shaft that drives the pump.
The chemical sprayer according to claim 7, wherein the control unit controls the chemical spraying operation depending on whether or not the rotation speed of the pump drive shaft is a predetermined rotation speed. The chemical sprayer according to any one of claims 7 to 11, wherein the control unit gives a warning prompting the chemical spraying operation to be performed in the predetermined working state when the working state is not the predetermined one. The drug sprayer according to any one of claims 7 to 12, wherein the control unit stops the traveling machine body when it is not in a predetermined working state. The chemical sprayer according to claim 8, wherein the control unit controls the traveling speed within the predetermined speed range when the traveling speed is not within the predetermined speed range. The drug sprayer according to claim 9, wherein the control unit controls the speed operation unit to be in a predetermined operation state when the speed operation unit is not in a predetermined operation state. The drug sprayer according to claim 10, wherein the control unit controls the rotation speed within the predetermined rotation speed range when the rotation speed is not within the predetermined rotation speed range. The drug sprayer according to claim 11, wherein the control unit controls the rotation speed of the pump drive shaft to be a predetermined rotation speed when the rotation speed of the pump drive shaft is not a predetermined rotation speed. The drug spraying according to any one of claims 1 to 17, wherein the control unit gives a predetermined warning when the spraying pressure is continuously equal to or lower than a predetermined value for a predetermined time during the operation of the pump. Machine. The drug spraying unit according to any one of claims 1 to 18, wherein the control unit stops the pump when the spraying pressure is continuously equal to or lower than a predetermined value for a predetermined time during the operation of the pump. Machine.

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