JP2001275542A - Pest control boom-opening or closing pest controller of control working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a pest control working machine obtained by disposing a pest control boom on a four-wheel drive type tractor requires a troublesome operation for each turning operation and a problem that an operator thereby often forgets an operation for switching a steering mode and an operation for opening or closing the control boom. SOLUTION: This pest control boom-opening or closing controller of the pest control working machine, characterized by disposing a pest control boom capable of being freely openably or closably folded into a control work position projected from the side of the vehicle body or into a waiting position for storing the boom, on a tractor capable of being switched into a front wheel steering mode and a four wheel steering mode, and disposing a control means for rotating the pest control boom on the waiting position side, when switched into the four wheel steering mode, and for rotating and controlling the pest control boom on the pest control work position side, when switched into the front wheel steering mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control apparatus for controlling the opening and closing of a control pneumatic boom of a control machine and belongs to the technical field of agricultural machinery.

[0002]

2. Description of the Related Art Conventionally, a pest control device has a spraying port disposed on a support frame which is provided at a front portion of a tractor equipped with a front wheel steering mechanism and a rear wheel steering mechanism so as to protrude horizontally in the left and right direction. The spraying tube was supported to form a control boom.
Since this type of pest control device has the above-described configuration, a wide range of pest control can be performed at a time, and the efficiency is high. Further, the tractor is provided with an independent steering mechanism for the front wheel and the rear wheel, and is used as a pest control working machine in which a small turning is effective by switching to an independent or interlocking combination.

[0003]

When the tractor is turned in a field, the conventional pest control machine described above requires many cumbersome operations before and after the turn, which is troublesome for the operator. For example, when the pest control machine is running in the front wheel steering mode and continuing the pest control operation, when it is necessary to switch to the four-wheel steering mode when approaching the edge of the field, the vehicle speed changing operation (to the lower speed side) is performed. ), The operation of closing the spray nozzle, the operation of storing the control boom, and the operation of switching to the four-wheel steering mode must be completed, and the steering wheel must be turned. Thus, this type of tractor has a control broom.
The control machine equipped with a control system requires a complicated operation every time the vehicle turns, and there is a major problem in that the operator sometimes forgets to switch the steering mode or open / close the control boom. .

[0004]

SUMMARY OF THE INVENTION The present invention takes the following technical means in order to solve the above-mentioned problems. First, the invention of claim 1 is a four-wheel steering tractor 3 equipped with a front wheel steering mechanism 1 and a rear wheel steering mechanism 2, each of which can select and switch an independent or interlocked steering mode. The tractor 3 has a pest control boom 5 that can be freely opened and closed and can be freely opened and closed between a pest control work position that protrudes outward from the vehicle body 4 to the side and extends and a standby position that is stored in the front-rear direction along the vehicle body 4. When the control boom 5 is switched to the four-wheel steering mode in which the front and rear wheel steering mechanisms 1 and 2 are linked, the control means is rotated and controlled to the standby position side. 6 of the control work machine connected to
System opening and closing control device.

Next, a second aspect of the present invention is the control boom 5.
When the front and rear wheel steering mechanisms 1 and 2 are switched to the interlocking four-wheel steering mode, they rotate to the standby position side, and when switched to the front wheel steering mode, they rotate to the control work position side. The control apparatus for controlling the opening and closing of the control boom of the control apparatus according to claim 1, which is connected to the control means 6 to be controlled.

A third aspect of the present invention is a hydraulic cylinder 7 for horizontally controlling a control boom 5 provided on a tractor 3.
3. A control boom opening / closing control device for a pest control machine according to claim 1, wherein a control valve 8 for switching and supplying hydraulic oil is integrally connected to said hydraulic cylinder 7. It was done.

[0007]

Since the present invention is constructed as described above, it solves the conventional problems and greatly simplifies the operation when the pest control machine approaches the edge of the field. It has the characteristic that the burden can be reduced.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, as shown in FIGS. 3 to 5, the tractor 3 is provided with a pair of left and right front wheels 9 and a rear wheel 10 provided on a front portion and a rear portion of the vehicle body 4, respectively. Is composed of a pilot seat 11 and a handle 12 provided on the front side thereof. The operation panel 13 is arranged around the handle 12 and is provided with a steering mode changeover switch 14 described later. The engine 15 is housed in an engine room covered by a bonnet cover 16 on the front side of the handle 12 so as to transmit the rotating parts.

As shown in FIG. 2, the handle 12 is interlockingly connected to a fully hydraulic steering device 17 via a handle shaft 18, and a metering pump 19 at the lower end.
Is turned to the left or right to determine which of the left turning oil passage 20 and the right turning oil passage 21 the oil flows first. At that time, the hydraulic pump 22 driven by the engine 15 is operated, and the hydraulic pressure is increased to the high-pressure oil circuit 23.
, The metering pump 19 performs a role of a direction switching valve, and makes a light and quick turn using high-pressure oil.

Next, the structure of the front and rear wheel steering mechanisms 1 and 2 and the operation thereof will be described with reference to FIG. First, in the case of a left turn, the steering wheel 12 is turned to the left, and the pressure oil which has flowed to the left turn oil passage 20 by the metering pump 19 is, as shown in FIG. Neutral room 24a (same device as steering electromagnetic valve 24, same hereafter)
To reach the front wheel oil passage switching valve 25 (the same device as the front wheel steering solenoid valve 25, the same hereinafter). Then, pressure oil flows into the left turning chamber 26a of the front hydraulic cylinder 26 through the working chamber 25b of the front wheel oil passage switching valve 25, and operates the front bell crank 27 in the direction of arrow "a" to move the front wheels 9, 9 to the left. It is configured to steer and travel in the direction.

Next, in the case of a right turn, the pressure oil that has flowed in the opposite direction to the right turn oil passage 21 by the metering pump 19 flows through the working chamber 25 b of the front wheel oil passage switching valve 25. After that, pressure oil flows into the right turning chamber 26b of the front hydraulic cylinder 26, and the front wheels 9, 9 are steered to the right. At that time, the left turning chamber 26
The oil in a reaches the metering pump 19 from the working chamber 25b of the front wheel oil passage switching valve 25 through the neutral chamber 24a of the rear wheel oil passage switching valve 24, and is discharged from the low pressure oil circuit 27 to the oil tank 28.

The front wheel steering angle is detected by a front wheel steering angle sensor 29 (potentiometer) and is input to the control means 6 described later. The rear wheel 10 is also measured by the rear wheel steering angle sensor 30. The above description is for the case where the steering mode changeover switch 14 is switched to the front wheel steering mode switch 14a.

Next, the steering mode changeover switch 14
Is switched to the four-wheel steering mode switch 14b, the rear-wheel oilway switching valve 24 and the front-wheel oilway switching valve 25 both become working chambers 24b and 25b, and the front hydraulic cylinder 26 and the rear hydraulic cylinder 31 are simultaneously steered. Is done.

The rear-wheel oilway switching valve 24 and the front-wheel oilway switching valve 25 are electromagnetic solenoid valves (electromagnetic valves), and as shown in FIG.
a, 14b, 14c) based on the switching operation.
b, 25b and the neutral chambers 24a, 25a are switched. Although the description is omitted, the rear wheel steering mode
The switch 14c is used in a special case.

Next, the control device will be described. First, the solution tank 32 is formed using a resin as a material, and is configured to be relatively light so that it can be easily carried by itself. The solution tank 32 is detachably attached to the right and left sides of the control seat 11 so as to surround the back as shown in the plane of FIG. 3, and a limited narrow space is filled with a large amount of the chemical for spraying as much as possible. It is configured to be able to. As shown in FIG. 4, the liquid supply hose 33 is provided with a base end communicating with the solution tank 32 via a liquid supply pump or a pressure regulating device, and has a distal end connected to a front part of the vehicle body 4. Is configured to be able to pressure-feed a chemical solution by communicating with a control boom 5 provided in the above.

In the case of the embodiment, the liquid feeding hose 33 is
Three control booms 5a, 5b, which will be described later,
5c to extend and communicate with each other. As shown in FIGS. 3 and 5, a central control boom 5a is provided on an elevating device 34 having a parallel link mechanism at a front portion of the vehicle body 4, as shown in FIGS. The left and right control booms 5b and 5c are connected to the left and right sides of the boom 5a by being foldably and pivotably connected to the upper and lower sides diagonally rearward. As described above, the control boom 5 includes the central control boom 5a and the left and right control booms 5b and 5c.
In this case, three feeding hoses 33 are connected to each other in an extended manner, and spraying nozzles are arranged at predetermined intervals so that a controlling operation can be performed.

In the embodiment, the control brushes on both the left and right sides are used.
The electric cylinders 35a and 5c are respectively provided at the bent portions of both sides of the central control boom 5a located at the center.
35b is provided so that a bending operation can be automatically performed. The control booms 5b, 5
c can be extended in a state of being extended linearly in the horizontal direction along the control boom 5a located at the center during the pest control work to increase the spraying width. As shown in the figure, the vehicle is bent rearward along the vehicle body 4 to reduce the width of the vehicle so that traveling on the road can be advantageously performed.

The electric cylinders 35a and 35b are
The left and right boom opening / closing switches 36a and 36b are operated by a manual operation so that the control booms 5b and 5c can be opened and closed. Next, as is well known in the art, the control boom 5 has a configuration in which horizontal control can be performed at a position where the control boom protrudes linearly in the lateral direction (during control work). explain.

First, as shown in FIG. 6, the horizontal control cylinder 7 is connected to a pivot arm 44 of a control support shaft 43 which is connected and supported to the center of the central control boom 5a.
5 are connected to perform horizontal control of the control boom 5. Then, as shown in FIG. 6, the control valve 8
It is provided integrally with the horizontal control cylinder 7 and supplies hydraulic oil to the horizontal control cylinder 7 while switching based on a control signal.

In this case, although not specifically shown, the horizontal control cylinder 7 is controlled by the control means based on detection information of a horizontal sensor for detecting the degree of inclination (or right and left contact height) of the control boom 5. A control signal is output to the valve 8, the valve is switched, and hydraulic oil is supplied. The configuration of the embodiment is characterized in that the control valve 8 and the horizontal control cylinder 7 are integrally formed close to each other, so that the response of the horizontal control cylinder 7 to the switching of the control valve 8 is promptly performed.

The configuration of the embodiment is advantageous in that a function of preventing high-speed vibration can be exhibited in addition to the conventional horizontal control. Next, control means 6 using a microcomputer (hereinafter referred to as "controller 6") will be described with reference to FIG.
It will be described based on.

First, the controller 6 is an arithmetic and control unit of a microcomputer having a memory in which a control program, reference data and the like are built, and has a configuration for performing arithmetic, logic, comparison and the like. I have. And control
In the input side, the automatic mode switch 40, the front wheel steering mode switch 14a, and the rear wheel steering mode switch 14
c, four-wheel steering mode switch 14b, front wheel steering angle sensor 29, rear wheel steering angle sensor 30, left boom open / close switch 3
6a and the right boom open / close switch 36b are connected to input information. And control
The front wheel steering solenoid valve 25, the rear wheel steering solenoid valve 24, the left electric cylinder 35a, and the right electric cylinder 35
b, steering mode lamp 41, control boom position lamp 42
Are connected respectively.

The controller 6 receives information from each of the above-mentioned sensors and switches. Before that, the automatic mode switch 40 is first turned on to activate the microcomputer. The tractor 3 is started up in a controllable state and is set in the automatic mode, so that the tractor 3 can be automatically steered and the control work can be performed.

The controller 6 is a four-wheel steering motor.
When the drive switch 14b is turned on, the front-wheel steering solenoid valve 2 is turned on.
A control signal is output to the steering wheel 5 and the rear wheel steering solenoid valve 24 to switch to a position where both the working chambers 24b and 25b function, and the steering can be performed in the four-wheel steering mode. At the same time, the controller 6 outputs a control signal to the left and right electric cylinders 35a and 35b so as to operate to the reduction side, and moves the left and right control booms 5b and 5c to the storage position side along the vehicle body 4. The folding rotation is performed.

As described above, the width of the tractor 3 becomes narrower when the control booms 5b and 5c, which protrude outward from the vehicle body 4, are folded to the stowed position. You can make a small turn. Next, the controller 6 turns on the front wheel steering mode switch 14a in order to complete the turning operation of the tractor 3 and resume the pest control work. When the front wheel steering mode switch 14a is turned on, the operating chamber 25b of the front wheel steering solenoid valve 25 functions. And the rear-wheel steering solenoid valve 2
4 outputs a control signal for switching to the neutral room 24a (see FIG. 2). At the same time, the controller 6 outputs a control signal to the left and right electric cylinders 35a and 35b so as to operate on the extension side, respectively, and moves the left and right control booms 5b and 5c waiting at the storage position to the vehicle body 4. Is rotated in the direction of projecting to the control work positions on both sides at the front of the vehicle.

As described above, when the control booms 5b and 5c are opened and closed by automatic control by operating the steering mode changeover switch 14, manual operation of the left and right boom open / close switches 36a and 36b becomes unnecessary. Then, the valve (open / close) of the spray nozzle may be operated.

As described above, according to the control device of the present invention, when turning the tractor in the field, it is possible to reduce the burden on the operator by reducing the troublesome operation before and after the turning, thereby performing the control work. I can do it. For example,
In the control work machine, the front wheel steering mode switch 14a
When the vehicle is moving forward in the ON state and continuing the pest control operation, if it is necessary to switch to the four-wheel steering mode switch 14b when approaching the edge of the field, simply turning on the switch requires the conventional operation. The operation for storing the control booms 5b and 5c is no longer necessary.

The control device according to the present invention turns on the front wheel steering mode switch 14a even when the pest control operation is restarted after the tractor 3 is turned by the four-wheel steering in a small turn.
When operated, the control booms 5b and 5c are automatically extended and controlled to reach the control position, eliminating the need for manual operation.

As described above, the present invention eliminates the need for complicated operations performed before and after turning, and has the feature of greatly reducing the burden on the operator.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control mechanism according to an embodiment of the present invention.

FIG. 2 is a hydraulic circuit diagram of the embodiment of the present invention.

FIG. 3 is a plan view showing an operation of the embodiment of the present invention.

FIG. 4 is a side view of the embodiment of the present invention.

FIG. 5 is a side view of the embodiment of the present invention.

FIG. 6 is a front view of the embodiment of the present invention.

[Explanation of symbols]

1 front wheel steering mechanism 2 rear wheel steering mechanism 3
Tractor 4 Body 5 Control beam 5a
Central control boom 5b Left control boom 5c Right control boom 6
Control means 7 Hydraulic cylinder 8 Control valve 9
Front wheel 10 Rear wheel 11 Pilot seat 12
Steering wheel 13 Operation panel 14 Steering mode changeover switch 14a Front wheel steering mode switch 14b Four wheel steering mode switch 14c Rear wheel steering mode switch 15 Engine 1
6 Bonnet cover 17 Full hydraulic steering system 18 Handle shaft 19
Metering pump 20 Left turning oil passage 21 Right turning oil passage 22
Hydraulic pump 23 High pressure oil circuit 24 Rear wheel oil passage switching valve 25
Front wheel oil passage switching valve 26 Front hydraulic cylinder 27 Low pressure oil circuit 28
Oil tank 29 Front wheel steering angle sensor 30 Rear wheel steering angle sensor 3
1 Rear hydraulic cylinder 32 Solution tank 33 Liquid transfer hose 34
Lifting device 35a Left electric cylinder 35b Right electric cylinder 36a Left boom opening / closing switch 36b Right boom opening / closing switch.

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Claims (3)

[Claims] 1. A four-wheel steering type tractor equipped with a front wheel steering mechanism and a rear wheel steering mechanism, each of which can select and switch an independent or interlocked steering mode, wherein the tractor includes a vehicle body. A control boom that can be freely opened and closed is provided at a control work position that protrudes outward from the side and extends and a standby position that is stored in the front-rear direction along the vehicle body. When the front / rear wheel steering mechanism is switched to the interlocking four-wheel steering mode, the pest control boom of the pest control machine is connected to the control means which is rotated and controlled to the standby position. Opening and closing control device. When the front and rear wheel steering mechanisms are switched to the interlocking four-wheel steering mode, the control boom is rotated and controlled to the standby position, and switches to the front wheel steering mode. 2. The control boom opening / closing control device for a pest control machine according to claim 1, wherein said control means is connected to a control means which is rotated and controlled to the control position. 3. A horizontal control cylinder for horizontally controlling a control boom provided on a tractor, wherein a control valve for switching and supplying hydraulic oil is integrally connected to the cylinder. 3. A control boom opening / closing control device for a pest control machine according to claim 2.