JP2020150915A - Chemical spraying apparatus - Google Patents

Abstract

To provide a chemical spraying apparatus capable of improving the efficiency of chemical spraying work.SOLUTION: A chemical spraying apparatus includes an operation part having a steering tower 15, and a chemical spraying part for spraying chemicals. The chemical spraying part has a center boom disposed at the front side of the operation part, a right side boom disposed in the right edge part of the center boom, and a left side boom disposed in the left edge part of the center boom. The center boom is formed so as to move up and down with respect to a machine body. The right side boom and the left side boom can be switched between a working posture along a machine body longitudinal direction in a plane view, and a storage posture along a machine body cross direction in a plane view. The rear face of the steering tower 15 is provided with a start operation tool 61 for receiving start operation, and the top face of the steering tower 15 is provided with a steering operation tool 62 for receiving steering operation of the machine body, and a boom operation tool 63 for receiving moving up/down operation of the center boom or posture change operation of the right side boom and the left side boom.SELECTED DRAWING: Figure 6

Description

The present invention relates to a drug sprayer.

Patent Document 1 describes a self-propelled boom sprayer including a boom nozzle device. The boom nozzle device is supported by a 4-section link device, and is moved up and down by the expansion and contraction operation of the hydraulic cylinder. The side boom of the boom nozzle device is expanded so as to be in line with the center boom when the chemical solution is sprayed, and is folded when the chemical solution is not sprayed.

JP-A-2017-143768

The operating tool that accepts the raising and lowering operation of the boom nozzle device and the operating tool that accepts the operation of retracting and deploying the side boom are relatively frequently operated by the operator. Where to place such an operating tool in the driving unit is an important issue from the viewpoint of improving the efficiency of the chemical spraying work. Patent Document 1 does not describe the arrangement of operating tools in the driving unit.

An object of the present invention is to provide a chemical sprayer capable of streamlining a chemical spraying operation.

The chemical sprayer of the present invention includes a driving unit provided with a control tower and a chemical spraying unit for spraying chemicals, and the chemical spraying unit includes a center boom provided in front of the driving unit and the above. It has a right side boom provided at the right end of the center boom and a left side boom provided at the left end of the center boom, and the center boom is configured to be able to move up and down with respect to the machine body. The right side boom and the left side boom are configured to be switchable between a working posture along the left-right direction of the aircraft in a plan view and a retracted posture along the front-rear direction of the aircraft in a plan view. A starting operation tool that accepts a starting operation is provided on the side surface or the rear surface of the tower, and an steering operating tool that accepts the steering operation of the aircraft and an elevating operation of the center boom or the right side of the control tower are provided on the upper surface of the control tower. It is characterized in that a boom operating tool that accepts a posture change operation of the boom and the left side boom is provided.

The starting operation tool is an operating tool that is operated when starting the chemical sprayer, and is used infrequently. The steering and boom controls are frequently operated while the chemical sprayer is running. According to the above-mentioned feature configuration, since the steering operation tool and the boom operation tool that are used relatively frequently are provided on the upper surface of the control tower, the operator can quickly operate the steering operation tool and the boom operation tool. The chemical spraying work can be made more efficient. Further, since the starting operation tool that is used relatively infrequently is provided on the side surface or the rear surface of the control tower, it is possible to effectively utilize the upper surface of the control tower and easily arrange the operation tool that is used relatively frequently. it can. Therefore, the chemical spraying work can be further made more efficient.

In the present invention, it is preferable that the boom operating tool is located on the right side of the steering operating tool.

According to this characteristic configuration, the boom operating tool can be quickly operated with the right hand, and the chemical spraying work can be further made more efficient.

In the present invention, it is preferable that the boom operating tool has an elevating operation tool that accepts an elevating operation of the center boom and a posture changing operating tool that accepts a posture changing operation of the right side boom and the left side boom. Is.

According to this characteristic configuration, the operation of raising and lowering the center boom and the operation of changing the postures of the left and right side booms can be performed by different operating tools. Therefore, it is possible to suppress an operation error and further improve the efficiency of the chemical spraying operation.

In the present invention, it is preferable that the posture change operating tool has a right operating tool that accepts the posture changing operation of the right side boom and a left operating tool that accepts the posture changing operation of the left side boom. ..

According to this characteristic configuration, the raising / lowering operation of the right side boom and the raising / lowering operation of the left side boom can be performed by different operating tools. Therefore, it is possible to suppress operation mistakes and finely operate the left and right side booms, further improving the efficiency of the chemical spraying operation.

In the present invention, it is preferable that the starting operation tool is provided on the rear surface of the control tower.

According to this characteristic configuration, the operation of the starting operation tool becomes easy, and the chemical spraying work can be further made more efficient.

In the present invention, it is preferable that the starting operation tool is located directly below the steering operation tool.

According to this characteristic configuration, the operation of the starting operation tool becomes easier, and the chemical spraying work can be further made more efficient.

In the present invention, it is preferable that a speed change operating tool that accepts a vehicle speed change operation is provided on the upper surface of the control tower.

The speed change controller is frequently operated while the drug sprayer is running. According to this feature configuration, since the speed change control tool that is used relatively frequently is provided on the upper surface of the control tower, the operator can quickly operate the speed change control tool, and the chemical spraying work can be further made more efficient. ..

In the present invention, it is preferable that the speed change operating tool is located on the left side of the steering operating tool.

According to this feature configuration, the steering operation tool can be operated with the right hand while the speed change operation tool is operated with the left hand, so that the chemical spraying work can be further made more efficient.

In the present invention, it is preferable that an engine operating tool for receiving an operation of changing the engine speed is provided on the upper surface of the control tower.

The engine speed needs to be quickly adjusted to suit the work situation. According to the above-mentioned feature configuration, since the engine operating tool is provided on the upper surface of the control tower, the operator can quickly operate the engine operating tool. Therefore, the chemical spraying work can be further made more efficient.

In the present invention, it is preferable that the engine operating tool is located on the right side of the steering operating tool and on the left side of the boom operating tool.

According to this feature configuration, the engine operating tool can be operated with the right hand while the operating operating tool is operated with the left hand, so that the chemical spraying work can be further made more efficient. In addition, since the engine operating tool is located on the left side of the boom operating tool, the operation of the boom operating tool is not hindered, and the chemical spraying work can be further made more efficient.

In the present invention, it is preferable that the upper surface of the control tower is provided with a spraying amount operating tool that accepts an operation of changing the chemical spraying amount of the chemical spraying portion.

The amount of chemicals sprayed needs to be appropriately adjusted according to the type of crop and the growing conditions. According to the above-mentioned feature configuration, since the spraying amount operating tool that is used relatively frequently is provided on the upper surface of the control tower, the chemical spraying amount can be easily and quickly changed, and the chemical spraying work is further made more efficient. can do.

In the present invention, it is preferable that the spray amount operating tool is located on the right side of the steering operating tool.

According to this characteristic configuration, the spraying amount control tool can be quickly operated with the right hand, and the chemical spraying work can be further made more efficient.

In the present invention, it is preferable that the spray amount operating tool is located in front of the boom operating tool.

Since the boom operating tool is operated when making a U-turn at the end of the field, the operating frequency is higher than that of the spray amount operating tool. According to the above-mentioned feature configuration, since the spray amount operating tool is located in front of the boom operating tool, the boom operating tool having a relatively high operation frequency is located near the operator, and the spraying amount is relatively infrequently operated. The operating tool is located far from the operator. Therefore, the operation of the boom operating tool becomes easy, and the chemical spraying work can be further made more efficient.

In the present invention, the driver unit is provided with a driver's seat in which an operator can be seated, and the operation of starting and stopping the spraying of the drug from the drug spraying unit is performed on the right side of the driver's seat in the driver's unit. It is preferable that a spraying operation tool for receiving is provided.

According to this characteristic configuration, since the spraying operation tool is provided on the right side of the driver's seat, the operator seated in the driver's seat can quickly and easily perform the operation of starting and stopping the spraying of the drug. The spraying work can be further made more efficient.

In the present invention, the spraying operation tool includes a central spraying operation tool that accepts an operation of starting and stopping the spraying of a drug from the center boom, and a right that accepts an operation of starting and stopping the spraying of a drug from the right side boom. It is preferable to have a spraying operation tool and a left spraying operation tool that accepts operations for starting and stopping the spraying of the drug from the left side boom.

According to this characteristic configuration, the operation of starting and stopping the spraying of the drug from the center boom, the right side boom, and the left side boom can be performed by another operating tool. Therefore, it is possible to suppress operation mistakes and finely control the mode of spraying the drug, and to further improve the efficiency of the drug spraying operation.

In the present invention, the driver unit is provided with a driver's seat in which an operator can be seated, and an auxiliary transmission operation tool for receiving a shift operation of the transmission mechanism is provided on the left side of the driver's seat in the driver's unit. Is suitable.

According to this characteristic configuration, according to this characteristic configuration, since the auxiliary transmission operating tool is provided on the left side of the driver's seat, the operator seated in the driver's seat can quickly and easily perform the transmission operation of the transmission mechanism. This makes it possible to further improve the efficiency of the chemical spraying work.

It is a left 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 of the boom sprayer when the drug spraying part is in a spraying state. It is a top view of the driving part. It is a rear view of the control tower. It is a left side view which shows the structure of the auxiliary transmission transmission mechanism. It is a left side view which shows the structure of the main shift transmission mechanism and the brake transmission mechanism. It is a perspective view which shows a part of the main shift transmission mechanism.

In the following description, the direction of the arrow F is the "front side of the aircraft" (see FIGS. 1 and 2), the direction of the arrow B is the "rear side of the aircraft" (see FIGS. 1 and 2), and the direction of the arrow L is the "left side of the aircraft". (See FIGS. 2 and 3), and the direction of the arrow R is "the right side of the aircraft" (see FIGS. 2 and 3).

[Basic configuration of chemical sprayer]
As an example of the chemical sprayer 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.

A differential device (not shown) is built in the axle units 4F and 4B. The differential device is a device that can tolerate the differential between the left and right front wheels 2 (or rear wheels 3). The differential device of the axle unit 4F is configured so that the state can be switched between an allowable state in which the differential between the left and right front wheels 2 is allowed and a prohibited state in which the differential between the left and right front wheels 2 is prohibited. The differential device of the axle unit 4B is configured so that the state can be switched between an allowable state in which the differential between the left and right rear wheels 3 is allowed and a prohibited state in which the differential between the left and right rear wheels 3 is prohibited. There is.

The engine E, the driving unit 5, the bonnet 6, the cabin 7, the drug tank 8, the drug spraying section 9, and the broadcaster 10 are supported side by side on the machine 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 drug tank 8 stores the drug inside. The drug spraying unit 9 sprays the drug stored in the drug tank 8 to the field. The broadcaster 10 sprays the fertilizer or chemicals stored inside the field.

The speed change mechanism 11 is supported at a portion of the body frame 1 corresponding to the lower part of the driving unit 5. 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. In the present embodiment, the transmission mechanism 11 includes a hydrostatic continuously variable transmission 11a (HST) and a gear type auxiliary transmission 11b. The power of the engine E is input to the continuously variable transmission 11a. The power shifted by the continuously variable transmission 11a is input to the auxiliary transmission 11b. The power shifted by the auxiliary transmission 11b is output to the axle units 4F and 4B.

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. The cabin 7 covers the driving unit 5. 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 on which an operator can board is formed inside the cabin 7.

The driver unit 5 is provided with a driver's seat 14 and a control tower 15. The driver's seat 14 is located at the center of the traveling machine C in the left-right direction, and is configured so that an operator can take a seat. The control tower 15 is located at the center of the traveling aircraft C in the left-right direction, in front of the driver's seat 14 and behind the windshield 12. A display unit D for displaying the traveling speed, the amount of the chemical sprayed, and the like is provided on the front portion of the control tower 15.

A deck portion 17 is provided on the left side of the fuselage with respect to the door 13, and a ladder-shaped boarding / alighting step 18 extends downward from the rear portion of the deck portion 17 on the lateral outer side of the fuselage. Although not described in detail, a sliding mechanism is provided at the front portion of the door 13, and the door 13 is configured to be slidable in the front-rear direction. The door 13 is configured to be switchable between a closed state in which the left side surface of the boarding space is closed and an open state in which the left side surface of the boarding space is opened. When the closed door 13 slides forward, the door 13 is switched to the open state, and when the open door 13 slides backward, the door 13 is switched to the closed state. The operator can enter the boarding space by climbing the boarding / alighting step 18 to stand at the rear of the deck portion 17 and opening the door 13 (switching to the open state).

The drug tank 8 is provided adjacent to the rear of the cabin 7. The left and right sides of the drug tank 8 extend to the left and right sides of the rear part of the cabin 7 where the rear part of the door 13 is located in the side view of the machine body. 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.

A balance weight 19 is provided at the front end of the fuselage frame 1. The balance weight 19 is configured so that the number of weights to be assembled can be changed to change the weight.

[Drug spraying part]
The chemical spraying portion 9 includes an elevating portion 20, a boom support portion 30, a boom portion 40, and a tilting operation portion 50.

The elevating portion 20 is supported by the front end portion of the machine frame 1, and supports the boom supporting portion 30 in a state in which it can be elevated. In this embodiment, the elevating part 20 is configured by a parallel link mechanism. A hydraulic elevating cylinder 21 for elevating and driving the free end portion of the boom support portion 30 is provided.

The elevating part 20 can freely change the positions of the boom support part 30 and the boom part 40 in the vertical direction within a predetermined range. In other words, the boom portion 40 and the center boom 41 of the boom portion 40 are configured so that the height with respect to the traveling machine body C can be changed within a predetermined movable range.

The boom support portion 30 is supported by the free end portion of the elevating portion 20 and supports the boom portion 40. The boom support portion 30 supports the boom portion 40 in a plane orthogonal to the front-rear direction of the machine body in a swingable state around the vicinity of the boom support portion 30.

The boom portion 40 includes a center boom 41, a left side boom 42, a right side boom 43, a left storage cylinder 44, and a right storage cylinder 45. The center boom 41 extends along the left-right direction of the machine body and is supported by the boom support portion 30 in a swingable state.

The rod-shaped left side boom 42 is supported by the left end portion of the center boom 41 in a state in which one end thereof can swing around the axis P1 along the front diagonally upward direction. A hydraulic left retractable cylinder 44 is provided across the left end of the center boom 41 and the left side boom 42.

The rod-shaped right side boom 43 is supported by the right end of the center boom 41 in a state where one end thereof can swing around the shaft core P2 along the front diagonally upward direction. A hydraulic right retractable cylinder 45 is provided across the right end of the center boom 41 and the right side boom 43.

The left side boom 42 and the right side boom 43 can be changed into a retracted posture and a working posture by the left retracted cylinder 44 and the right retracted cylinder 45. As shown in FIG. 4, the working posture is a posture in which the left side boom 42 and the right side boom 43 are aligned in the left-right direction of the machine body in a plan view. When in the working posture, the center boom 41, the left side boom 42, and the right side boom 43 are in a posture of extending in a straight line. As shown in FIGS. 1, 2, and 3, the retracted posture is a posture in which the left side boom 42 and the right side boom 43 are in the front-rear direction of the aircraft in a plan view. When in the retracted posture, the left side boom 42 and the right side boom 43 are in a posture of extending diagonally upward and backward. In other words, the left side boom 42 and the right side boom 43 in the retracted posture are configured so that the positions in the vertical direction become higher toward the rear of the machine body in the side view.

A plurality of nozzles N are provided on the center boom 41, the left side boom 42, and the right side boom 43. A drug is supplied from the drug tank 8 to the nozzle N by a pump (not shown), and the drug is sprayed from the nozzle N to the field. When the chemical spraying unit 9 sprays the chemical to the field, the heights of the center boom 41, the left side boom 42 and the right side boom 43 from the field surface are adjusted according to the height of the crops in the field. ..

[Arrangement of operating tools in the driving unit]
As shown in FIGS. 5 and 6, the driving unit 5 has a starting operation tool 61, a steering operation tool 62, a boom operation tool 63, a transmission operation tool 64, an engine operation tool 65, and a spray amount operation. A tool 66, a spraying operation tool 67, and an auxiliary transmission operation tool 68 are provided.

The starting operation tool 61 is an operating tool that accepts the operation of starting the boom sprayer from the operator. The operator starts the boom sprayer by inserting the start key into the start operator 61 and turning it. As shown in FIG. 6, the starting operation tool 61 is provided on the rear surface of the control tower 15 directly below the steering operation tool 62.

The steering operation tool 62 is an operation tool that receives steering operations of the front wheels 2 and the rear wheels 3 from the operator. In this embodiment, the steering wheel 62 is a circular handle. The steering control tool 62 is provided on the upper surface of the control tower 15. The steering operating tool 62 is connected to a hydraulic cylinder that steers the front wheels 2 (not shown) and a hydraulic cylinder that steers the rear wheels 3 (not shown) via a hydraulic power steering mechanism. ing.

The boom operating tool 63 is an operating tool that receives operations on the center boom 41, the left side boom 42, and the right side boom 43 from the operator. The boom operating tool 63 is arranged on the upper surface of the control tower 15 on the right side of the steering operating tool 62.

The boom operating tool 63 includes an elevating operating tool 63a and a posture changing operating tool 63b. The elevating operation tool 63a is an operation tool that receives an elevating operation of the center boom 41 from an operator. The posture change operation tool 63b is an operation tool that accepts the posture change operations of the left side boom 42 and the right side boom 43.

The posture change operating tool 63b has a right operating tool 63c and a left operating tool 63d. The right operating tool 63c is an operating tool that receives a posture change operation of the right side boom 43 from an operator. The left operating tool 63d is an operating tool that receives a posture change operation of the left side boom 42 from an operator.

The elevating operation tool 63a is a lever-type switch that can be inverted in the front-rear direction. When the operator operates the elevating operation tool 63a, an electromagnetic valve (not shown) of a hydraulic circuit that supplies hydraulic oil to the elevating cylinder 21 is operated, the elevating cylinder 21 expands and contracts, and the boom portion 40 moves up and down.

The right operating tool 63c and the left operating tool 63d are lever-type switches that can be inverted in the front-rear direction. When the operator operates the right operating tool 63c, the solenoid valve (not shown) of the hydraulic circuit that supplies hydraulic oil to the right storage cylinder 45 is operated, the right storage cylinder 45 expands and contracts, and the right side boom 43 is in the retracted posture. Change posture between and working posture. When the operator operates the left operating tool 63d, the solenoid valve (not shown) of the hydraulic circuit that supplies hydraulic oil to the left storage cylinder 44 is operated, the left storage cylinder 44 expands and contracts, and the left side boom 42 is in the retracted posture. Change posture between and work posture.

As shown in FIGS. 5 and 6, the elevating operation tool 63a, the right operation tool 63c, and the left operation tool 63d are arranged side by side in the left-right direction. The elevating operation tool 63a is located on the left side of the right operation tool 63c and the left operation tool 63d. The right operating tool 63c is arranged on the right side of the left operating tool 63d.

The speed change operating tool 64 is an operating tool that receives an operation of changing the vehicle speed from an operator. The speed change operating tool 64 is a lever-type operating tool that can swing in the front-rear direction. The speed change operating tool 64 is connected to the continuously variable transmission 11a of the speed change mechanism 11 via the main speed change transmission mechanism 110 (described later). The speed change operating tool 64 is arranged on the upper surface of the control tower 15 on the left side of the steering operating tool 62.

The engine operating tool 65 is an operating tool that receives an operation of changing the rotation speed of the engine E from an operator. The engine operating tool 65 is a lever-type operating tool that can swing in the front-rear direction. The engine operating tool 65 is connected to the output adjusting lever (not shown) of the engine E by an operating wire (not shown). The engine operating tool 65 is provided on the upper surface of the control tower 15. The engine operating tool 65 is located on the right side of the steering operating tool 62 and on the left side of the boom operating tool 63.

The spraying amount operating tool 66 is an operating tool that accepts an operation of changing the chemical spraying amount of the chemical spraying unit 9 from the operator. The spray amount control tool 66 is a volume type control tool. Specifically, the spraying amount operating tool 66 accepts an operation of changing the set value of the chemical spraying amount. The spray amount control tool 66 is provided on the upper surface of the control tower 15. The spray amount operating tool 66 is located on the right side of the steering operating tool 62 and on the front side of the boom operating tool 63.

The spraying operation tool 67 is an operating tool that receives from the operator the operation of starting and stopping the spraying of the drug from the drug spraying unit 9. The spraying operation tool 67 is arranged on the right side of the driver's seat 14 in the driver's unit 5.

The spraying operation tool 67 includes a central spraying operation tool 67a, a right spraying operation tool 67b, and a left spraying operation tool 67c. The central spraying operation tool 67a is an operating tool that receives from the operator the operation of starting and stopping the spraying of the drug from the nozzle N arranged in the center boom 41. The right spraying operation tool 67b is an operating tool that accepts from the operator the operation of starting and stopping the spraying of the drug from the nozzle N arranged on the right side boom 43. The left spraying operation tool 67c is an operating tool that accepts from the operator the operation of starting and stopping the spraying of the drug from the nozzle N arranged on the left side boom 42. The central spray operation tool 67a, the right spray operation tool 67b, and the left spray operation tool 67c are lever-type operation tools that can swing in the front-rear direction.

The sub-transmission operating tool 68 is an operating tool that receives a shifting operation of the shifting mechanism 11 from an operator. The auxiliary transmission operating tool 68 is a lever-type operating tool that can swing in the front-rear direction. The auxiliary transmission tool 68 is connected to the auxiliary transmission 11b of the transmission mechanism 11 by an auxiliary transmission transmission mechanism 100 (described later). The auxiliary transmission tool 68 is arranged on the left side of the driver's seat 14 in the driver's unit 5.

The accelerator operating tool 69 is an operating tool that accepts an operation of changing the rotation speed of the engine E from an operator. The accelerator operating tool 69 is a pedal-type operating tool. The accelerator operating tool 69 is connected to the output adjusting lever (not shown) of the engine E by an operating wire (not shown). The accelerator operating tool 69 is provided on the floor 5a of the driving unit 5. The accelerator operating tool 69 is located on the right side of the control tower 15, and is located on the right side of the steering operating tool 62.

The brake operating tool 70 is an operating tool that receives a brake operation from an operator. The brake operating tool 70 is a pedal-type operating tool. The brake operating tool 70 is connected to a brake mechanism (not shown) built in the transmission mechanism 11 by a brake transmission mechanism 120 (described later). The brake operating tool 70 is provided on the floor 5a of the driving unit 5. The brake operating tool 70 is located behind the control tower 15 and is located on the right side of the rotation shaft 62a of the steering operating tool 62.

The diff lock operating tool 71 is an operating tool that accepts from the operator the operation of switching the state of the differential devices of the axle units 4F and 4B. The diff lock operating tool 71 is a pedal-type operating tool. The diff lock operating tool 71 is connected to the differential devices of the axle units 4F and 4B by a diff lock transmission mechanism (not shown). The diff lock operating tool 71 is provided on the floor 5a of the driving unit 5. The diff lock operating tool 71 is located behind the control tower 15 and is located on the right side of the rotation shaft 62a of the steering operating tool 62.

[Mechanism for controlling the start, stop, and amount of drug spraying]
A pump 75, a pressure regulating valve 76, and a water diversion device 77 are provided in the central portion of the traveling machine body C. The pump 75 sends the medicine stored in the medicine tank 8 to the pressure regulating valve 76. The pump 75 is driven by the power output from the PTO shaft of the transmission mechanism 11. The pressure regulating valve 76 adjusts the pressure of the medicine sent from the pump 75 and sends it to the water diversion device 77. The water diversion device 77 distributes the medicine sent from the pressure regulating valve 76 and sends it to the nozzle N of the center boom 41, the nozzle N of the left side boom 42, and the nozzle N of the right side boom 43.

A control device (not shown) for controlling the pressure regulating valve 76 is provided. A spray amount control tool 66 is connected to this control device. In the control device, the amount of chemicals sprayed per unit area becomes the set value based on the operation of changing the set value of the amount of chemicals sprayed received by the spraying amount control tool 66 and the current traveling speed of the traveling machine C. In addition, the pressure regulating valve 76 is controlled.

The water diversion device 77 is connected to the central spray operation tool 67a, the right spray operation tool 67b, and the left spray operation tool 67c. The water diversion device 77 opens and closes the supply path of the drug to the nozzle N of the center boom 41 based on the operation of the central spraying operation tool 67a. The water diversion device 77 opens and closes the supply path of the drug to the nozzle N of the right side boom 43 based on the operation of the right spraying operation tool 67b. The water diversion device 77 opens and closes the supply path of the drug to the nozzle N of the left side boom 42 based on the operation of the left spraying operation tool 67c.

[Sub transmission transmission mechanism]
The auxiliary transmission transmission mechanism 100 includes a lever 101, a rod 102, and a lever 103. The lower end of the auxiliary transmission tool 68 is connected to the upper end of the lever 101. The auxiliary transmission operating tool 68 and the lever 101 can swing around the shaft core P3 along the left-right direction of the machine body in an integrated state. The rear end of the rod 102 is connected to the lower end of the lever 101. The lever 103 can swing around the axis P4 along the left-right direction of the machine body. The lower end of the lever 103 is connected to the front end of the rod 102 and the operation portion 11c of the auxiliary transmission 11b.

When the auxiliary transmission tool 68 is operated from the upright position (solid line in FIG. 7) to the forward tilted position (two-dot chain line in FIG. 7), the lever 101 swings backward, the rod 102 moves backward, and the lever The 103 swings backward, and the operation unit 11c moves backward. Then, the auxiliary transmission 11b is changed from high speed (moving speed) to low speed (working speed). In the present embodiment, since the auxiliary transmission transmission mechanism 100 includes two fulcrums (shaft core P3 and shaft core P4), the degree of freedom in layout is increased as compared with the case where the auxiliary transmission transmission mechanism 100 includes only one fulcrum. Be done. As a result, the shapes of the lever 101 and the lever 103 can be simplified, and the operation feeling of the auxiliary transmission operating tool 68 can be made comfortable. Further, the auxiliary transmission transmission mechanism 100 can be easily disassembled and attached / detached.

[Main shift transmission mechanism]
As shown in FIG. 8, the main shift transmission mechanism 110 includes a lever 111, a rod 112, a lever 113, a first operating member 114, and a second operating member 115. The lower end of the speed change operating tool 64 is connected to the upper end of the lever 111. The speed change operating tool 64 and the lever 111 can swing around the shaft core P5 along the left-right direction of the machine body in an integrated state. The upper end of the rod 112 is connected to the front end of the lever 111. The lower end of the rod 112 is connected to the front end of the lever 113. The lever 113 is connected to the trunnion shaft 11d of the continuously variable transmission 11a, and the trunnion shaft 11d rotates with the swing of the lever 113.

When the speed change operating tool 64 is operated forward from the neutral position (position shown in FIG. 8), the lever 111 swings counterclockwise when viewed from the left side of the machine body. The rod 112 moves upward. A lever 113 swings clockwise around the trunnion shaft 11d when viewed from the left side of the machine body. The trunnion shaft 11d is rotationally operated to shift the continuously variable transmission 11a to the forward side. When the speed change operating tool 64 is operated from the neutral position to the rear, the lever 111 swings clockwise when viewed from the left side of the machine body. The rod 112 moves downward. A lever 113 swings counterclockwise around the trunnion shaft 11d when viewed from the left side of the machine body. The trunnion shaft 11d is rotated to shift the continuously variable transmission 11a to the reverse side.

The upper end of the first operating member 114 is connected to the rear end of the lever 111. The upper end of the second operating member 115 is connected to the front end of the lever 111. The lower end of the first operating member 114 and the lower end of the second operating member 115 are connected to the front end of the lever 125 (described later) of the brake transmission mechanism 120.

[Brake transmission mechanism]
As shown in FIGS. 8 and 9, the brake transmission mechanism 120 includes a rod 121, a lever 122, a rod 123, a lever 124, a lever 125, a pin 126, a shaft 127, a lever 129, and a spring 130.

A pedal-type brake operating tool 70 is supported on the upper end of the rod 121. The lower end of the rod 121 is supported by the lower end of the lever 122. The upper end of the lever 122 is supported by the shaft 122a. The shaft 122a is supported by the airframe frame 1 in a posture of extending along the left-right direction of the airframe and swinging around the axis P6. The upper end of the lever 129 is supported by the shaft 122a. The brake operating tool 70, the rod 121, the lever 122, the shaft 122a, and the lever 129 can swing around the central axis (shaft core P6) of the shaft 122a in an integrated state. A spring 130 is provided over the lower end of the lever 129 and the horizontal frame 1b. The lever 129 is urged obliquely forward and upward by the spring 130. The horizontal frame 1b is a frame extending along the left-right direction of the airframe, which is provided between a pair of left-right airframe frames 1 extending along the front-rear direction of the airframe.

The central portion of the lever 122 and the operating portion (not shown) of the brake mechanism built in the speed change mechanism 11 are connected by a rod (not shown). When the occupant steps on the brake operating tool 70, the brake operating tool 70, the rod 121, the lever 122, and the lever 129 swing counterclockwise around the axis P6 when viewed from the right side of the machine body. The operation part of the brake mechanism is operated to operate the brake mechanism.

The rear end of the rod 123 is connected to the lever 122. The front end of the rod 123 is connected to the lower end of the lever 124. The upper end of the lever 124 is connected to the right end of the shaft 127. The rear end of the lever 125 is supported by the left end of the shaft 127. The shaft 127 is supported by the support portion 1c in a state in which it can swing around the shaft core P7. That is, the lever 124, the lever 125, and the shaft 127 can swing around the shaft core P7 in an integrated state. The support portion 1c is supported by the horizontal frame 1b.

A pin 126 is attached to the front end of the lever 125. The pin 126 is inserted into a long hole at the lower end of the first operating member 114 and a long hole at the lower end of the second operating member 115.

[Linkage between main shift transmission mechanism and brake transmission mechanism]
In the present embodiment, when the brake operating tool 70 is operated, the shifting operating tool 64 is displaced to the neutral position (the position shown in FIG. 8), the continuously variable transmission 11a is shifted to the neutral position, and the traveling machine body C is stopped. As described above, the main shift transmission mechanism 110 and the brake transmission mechanism 210 are configured.

When the occupant steps on the brake operating tool 70, the brake operating tool 70, the rod 121, and the lever 122 swing counterclockwise around the axis P6 when viewed from the right side of the machine body. The rod 123 moves backward. The lever 124, the shaft 127, and the lever 125 swing counterclockwise around the axis P7 when viewed from the right side of the machine body. Pin 126 moves downward.

It is assumed that the passenger steps on the brake operating tool 70 while the traveling machine C is stopped. The speed change controller 64 is in the neutral position (position shown in FIG. 8). The pin 126 moves downward as the brake operating tool 70 is operated. The pin 126 moves inside the elongated holes of the first operating member 114 and the second operating member 115, but does not reach the lower end of the elongated holes. The first operating member 114 and the second operating member 115 do not move.

It is assumed that the passenger steps on the brake operating tool 70 while the traveling machine C is moving forward. The speed change operating tool 64 is operated forward. The lever 111 is in a position that swings counterclockwise from the position shown in FIG. The first operating member 114 is located above the position of FIG. 8, and the second operating member 115 is located below the position of FIG. When the pin 126 moves downward with the operation of the brake operating tool 70, the pin 126 comes into contact with the lower end portion of the first operating member 114 and moves the first operating member 114 downward. The first operating member 114 returns to the position shown in FIG. 8, and the lever 111, the speed change operating tool 64, and the second operating member 115 return to the neutral position (position shown in FIG. 8) accordingly. The continuously variable transmission 11a is shifted to the neutral position, and the traveling machine body C stops.

It is assumed that the passenger steps on the brake operating tool 70 while the traveling machine C is moving backward. The speed change operating tool 64 is operated backward. The lever 111 is in a position that swings clockwise from the position shown in FIG. The first operating member 114 is located below the position of FIG. 8, and the second operating member 115 is located above the position of FIG. When the pin 126 moves downward with the operation of the brake operating tool 70, the pin 126 comes into contact with the lower end portion of the second operating member 115 and moves the second operating member 115 downward. The second operating member 115 returns to the position shown in FIG. 8, and the lever 111, the speed change operating tool 64, and the first operating member 114 return to the neutral position (position shown in FIG. 8) accordingly. The continuously variable transmission 11a is shifted to the neutral position, and the traveling machine body C stops.

In the present embodiment, the lengths of the first operating member 114 and the second operating member 115 can be changed by the screw mechanism S. As a result, the position where the speed change operation tool 64 returns when the passenger steps on the brake operation tool 70 can be changed from the neutral position to another position.

For example, the length of the first operating member 114 is changed to be longer than the length shown in FIG. It is assumed that the passenger steps on the brake operating tool 70 while the traveling machine C is moving forward. The speed change operating tool 64 is operated forward. The lever 111 is in a position where it swings counterclockwise from the position shown in FIG. The first operating member 114 is located above the position of FIG. 8, and the second operating member 115 is located below the position of FIG. When the pin 126 moves downward with the operation of the brake operating tool 70, the pin 126 comes into contact with the lower end portion of the first operating member 114 and moves the first operating member 114 downward. Since the length of the first operating member 114 is longer than the length shown in FIG. 8, the first operating member 114 returns to a position higher than the position shown in FIG. Along with this, the speed change operating tool 64 returns to the position where it swings forward from the neutral position (position in FIG. 8). The continuously variable transmission 11a is shifted to a state in which the speed is lower than that before the operation of the brake operating tool 70 and is on the forward side of the neutral position, for example, a state of slow forward movement. By changing the return position of the speed change operating tool 64 when the brake operating tool 70 is operated while the traveling machine C is moving forward, the traveling machine C tilts forward at the time of sudden braking. Can be suppressed.

[HST Neutral Arm]
As shown in FIG. 9, a lever 135 for holding the trunnion shaft 11d of the continuously variable transmission 11a in a neutral position is provided. The shaft 127 of the brake transmission mechanism 120 is inserted through the cylindrical portion 135a at the rear end of the lever 135. That is, the lever 135 can swing around the same shaft core P7 as the lever 125 of the brake transmission mechanism 120. The collar 135b is rotatably supported at the tip of the lever 135. The lever 135 is urged downward by a torsion spring 135c. As a result, the collar 135b is pressed against the upper surface of the lever 113 of the main shift transmission mechanism 110. When the trunnion shaft 11d is in the neutral position, the collar 135b is fitted into the recess formed on the upper surface of the lever 113. As a result, the trunnion shaft 11d is held in the neutral position. When the speed change operating tool 64 is operated and the lever 113 swings, the collar 135b is pushed upward by the upper surface of the lever 113. The lever 135 swings upward. The collar 135b exits from the recess of the lever 113.

[Other Embodiments]
[1] In the above embodiment, the output of the engine E is decelerated by the speed change mechanism 11 and output to the PTO shaft. The speed change mechanism 11 is not provided with a mechanism for changing the deceleration rate of the PTO shaft. By modifying this, the speed change mechanism 11 may be configured so that the deceleration rate of the PTO shaft can be changed. In that case, the operation unit 5 is provided with a PTO speed change operating tool that accepts an operation of changing the deceleration rate of the PTO shaft and a PTO clutch operating tool that accepts an operation of turning on / off the power transmission to the PTO shaft (clutch operation).

The PTO clutch operating tool may be a pedal-type operating tool. In this case, the PTO clutch operator is provided on the floor 5a of the driving unit 5. The frequency of use of the PTO clutch operator is relatively low. Therefore, it is preferable that the PTO clutch operating tool is located on the left side of the steering operating tool 62. As a result, the dead space of the driving unit 5 can be effectively utilized, and the comfortability of the driving unit 5 can be improved. It is preferable that the airframe frame 1 is provided with a configuration for returning and positioning the PTO clutch operator. Since the airframe frame 1 is highly synthesized, the position of the PTO clutch operating tool can be stabilized, and the operating feeling of the PTO clutch operating tool can be enhanced.

The PTO speed change operating tool may be a lever type operating tool. Further, the PTO speed change operating tool may be configured to accept an operation of changing the deceleration rate of the PTO shaft and an operation of turning on / off the power transmission to the PTO shaft (clutch operation). As a result, the number of operating tools of the driving unit 5 can be reduced, space efficiency can be improved, and the number of parts can be reduced to reduce the cost.

For example, the PTO speed change controller is configured as follows. The lever-type PTO speed change controller is supported so that the opening can move along a U-shaped movement locus with the opening facing left. When the PTO speed change controller is located at the left side position in the U-shaped movement locus, that is, at the apex of the U-shape, the power transmission to the PTO axis is disengaged (clutch disengaged). When the PTO speed change controller is located at the right side of the U-shaped movement locus, that is, at the bottom of the U-shape, power is transmitted to the PTO axis (engaged in the clutch position). When the PTO speed change operation tool is in the upper position in the U-shaped movement locus, the deceleration rate of the PTO axis of the speed change mechanism 11 is set to the high speed side (low deceleration rate). When the PTO speed change controller is in the lower position in the U-shaped movement locus, the deceleration rate of the PTO axis of the speed change mechanism 11 is set to the low speed side (high deceleration rate).

By configuring the PTO shift control tool as described in the previous section, the deceleration rate of the PTO shaft is changed while the PTO shift control tool is operated to the right, so that the power transmission to the PTO shaft is disengaged (clutch disengagement). It will be done reliably. Therefore, the operation of changing the deceleration rate of the PTO shaft can be smoothly performed while suppressing the failure of the speed change mechanism 11.

In the vicinity of the speed change mechanism 11, a transmission mechanism for transmitting a reduction rate change operation from the PTO speed change operation tool to the speed change mechanism 11 is provided. It is preferable that the support shaft of the lever of the transmission mechanism is common to the support shaft (shaft 122a) of the brake transmission mechanism 120 and the support shaft of the diff lock transmission mechanism. As a result, the number of parts for the support shaft can be reduced, and the cost can be reduced.

[2] A friction plate may be provided on the lever 111 of the main shift transmission mechanism 110 in order to give a feeling of resistance to the forward / backward swing operation of the shift controller 64. In addition, in order to give a click feeling when the speed change operating tool 64 returns to the neutral position, a notch portion (recess) is provided in the lever 111 of the main shift transmission mechanism 110, and a detent portion that can be engaged with the notch portion is provided. It may be provided. As a result, it is possible to suppress a situation in which the speed change operation tool 64 exceeds the neutral position when returning from the forward position (or the reverse position) to the neutral position.

[3] In the above embodiment, for example, the speed change operating tool 64 is a lever type and the accelerator operating tool 69 is a pedal type. However, the type of the operating tool is not limited to the one described in the above embodiment, and various types such as a lever type, a switch type, a volume type, a button type, and a pedal type can be used.

The present invention can be applied to a chemical sprayer that sprays chemicals in a field.

5: Driving unit 9: Chemical spraying unit 14: Driver's seat 15: Control tower 41: Center boom 42: Left side boom 43: Right side boom 61: Starting operation tool 62: Steering operation tool 63: Boom operation tool 63a: Elevating Operation tool 63b: Posture change operation tool 63c: Right operation tool 63d: Left operation tool 64: Speed change operation tool 65: Engine operation tool 66: Spray amount operation tool 67: Spray operation tool 67a: Central spray operation tool 67b: Right spray operation Tool 67c: Left spray operation tool 68: Secondary transmission operation tool

Claims (16)

A driver with a control tower and
It is equipped with a drug spraying section for spraying drugs.
The chemical spraying portion includes a center boom provided on the front side of the driving portion, a right side boom provided on the right end portion of the center boom, and a left side boom provided on the left end portion of the center boom. Have and
The center boom is configured to be able to move up and down with respect to the airframe.
The right side boom and the left side boom are configured to be switchable between a working posture along the left-right direction of the machine in a plan view and a retracted posture along the front-rear direction of the machine in a plan view.
A starting operation tool that accepts a starting operation is provided on the side surface or the rear surface of the control tower.
On the upper surface of the control tower, a steering operation tool that accepts the steering operation of the aircraft and a boom operating tool that accepts the raising / lowering operation of the center boom or the attitude change operation of the right side boom and the left side boom are provided. Drug sprayer. The chemical sprayer according to claim 1, wherein the boom operating tool is located on the right side of the steering operating tool. The boom operating tool according to claim 1 or 2, further comprising an elevating operation tool that accepts an elevating operation of the center boom and a posture changing operating tool that accepts a posture changing operation of the right side boom and the left side boom. The drug sprayer described. The drug spraying according to claim 3, wherein the posture change operating tool includes a right operating tool that accepts the posture changing operation of the right side boom and a left operating tool that accepts the posture changing operation of the left side boom. Machine. The chemical sprayer according to any one of claims 1 to 4, wherein the starting operation tool is provided on the rear surface of the control tower. The chemical sprayer according to claim 5, wherein the starting operation tool is located directly below the steering operation tool. The chemical sprayer according to any one of claims 1 to 6, wherein a speed change operating tool for receiving a vehicle speed change operation is provided on the upper surface of the control tower. The chemical sprayer according to claim 7, wherein the speed change operating tool is located on the left side of the steering operating tool. The chemical sprayer according to any one of claims 1 to 8, wherein an engine operating tool for receiving an operation of changing the engine speed is provided on the upper surface of the control tower. The chemical sprayer according to claim 9, wherein the engine operating tool is located on the right side of the steering operating tool and on the left side of the boom operating tool. The chemical spraying machine according to any one of claims 1 to 10, wherein a spraying amount operating tool for receiving an operation of changing the chemical spraying amount of the chemical spraying portion is provided on the upper surface of the control tower. The chemical spraying machine according to claim 11, wherein the spraying amount operating tool is located on the right side of the steering operating tool. The chemical spraying machine according to claim 11 or 12, wherein the spraying amount operating tool is located on the front side of the boom operating tool. The driver unit is provided with a driver's seat in which an operator can sit.
The invention according to any one of claims 1 to 13, wherein a spraying operation tool for receiving an operation of starting and stopping the spraying of a drug from the drug spraying section is provided on the right side of the driver's seat in the driver's seat. Chemical sprayer. The spraying operation tool includes a central spraying operation tool that receives an operation of starting and stopping the spraying of a drug from the center boom, and a right spraying operation tool that accepts an operation of starting and stopping the spraying of a drug from the right side boom. The drug sprayer according to claim 14, further comprising a left spray operation tool that accepts operations for starting and stopping the spraying of the drug from the left side boom. The driver unit is provided with a driver's seat in which an operator can sit.
The chemical sprayer according to any one of claims 1 to 15, wherein an auxiliary transmission operating tool for receiving a transmission operation of a transmission mechanism is provided on the left side of the driver's seat in the operation unit.

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