JP2000175608A - Spray work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray work vehicle having a good vehicle body balance by shortening the total length of an engine, a steering part and a receiving tank. SOLUTION: A spraying part 5a for spraying a material to be sprayed, for example, liquid chemicals, a steering part 3, and a receiving tank 5b for the material to be sprayed are set to a machine body frame 2 in the longitudinal direction and the material to be sprayed in the receiving tank is fed through a feeder 5c, for example, a liquid pump to the spraying part 5. In this case, the feeder 5c is arranged between the spraying part 5a and the receiving tank 5b but near the receiving tank 5b, and the feeder 5c and the spraying part 5a are connected with a delivering pipe 53. In addition, a fuel tank 1e is set in a space formed under driver's seat 3b, and the feeder 5c and a switching valve 51 for the material to be sprayed are symmetrically distributed into two spaces formed on both sides of the driver's seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying vehicle for spraying a spray such as a chemical for control or a fertilizer for crops or a soil conditioner with a spraying device.

[0002]

2. Description of the Related Art Conventionally, a storage tank for storing a chemical in a traveling body (traveling work vehicle) in which an engine and a control unit are installed in a body frame having front wheels and rear wheels from the front, and the chemical is delivered from the storage tank. By providing a spraying device consisting of a feeding device and a spraying unit that sprays the delivered chemical from a nozzle provided on a wide boom, a spraying vehicle that performs control work on paddy rice and field crops has already been developed. Are known.

[0003]

However, in the above-mentioned spreader, the arrangement relationship between the storage tank, the feeding device, and the fuel tank for the engine is not taken into consideration. However, there is a problem that the negative pressure resistance at the time of sucking a chemical solution (sprayed material) becomes excessive and the spraying ability is reduced.

[0004]

In order to achieve the above object, a spraying work vehicle according to the present invention is a spraying machine for spraying a sprayed object such as a chemical solution in the front-rear direction of a body frame 2 having a front wheel 1a and a rear wheel 1b. A part 5a, a control part 3, and a storage tank 5b for storing the above-mentioned scattered material are installed, and the scattered material in the storage tank 5b is sent to the scattering part 5a by a feeding device 5c such as a liquid pump to be scattered. In the work vehicle, the feeding device 5c is disposed between the spraying unit 5a and the storage tank 5b and near the storage tank 5b, and the feeding device 5c and the spreading unit 5a are connected by a delivery pipe 53. ing. In addition, the seat 3b of the control section 3 is provided substantially at the center of the body width, the fuel tank 1e is installed in a space formed below the seat 3b, and the space formed on both sides of the seat 3b. The feeding device 5c and the switching valve 51 for the scattered material sent from the feeding device 5c are arranged in a distributed manner.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a spraying vehicle according to the present invention. In the drawings, reference numeral 1 denotes a spraying work vehicle, and this spraying work vehicle 1 has a front wheel 1a.
An engine 1c is mounted on a body frame 2 having a rear wheel 1b by covering the engine 1c with a bonnet 1d from the front, and an operation panel provided with various operation levers and operation switches, a handle 3a and a seat 3b described later. A traveling work vehicle 1s including a control unit 3 composed of the above-mentioned components, a transmission case 4 connected to the engine 1c by a transmission mechanism 10, and the like. A spraying unit 5a, which is mounted on the front part of the body so as to be able to move up and down with respect to the traveling work vehicle 1s, and sprays a scattered substance such as a medicine, and a storage tank 5b which is mounted on the rear part of the body and stores the scattered matter. , This storage tank 5b
The spraying device 5 comprises a feeding device 5c (pump) for sending the sprayed material from the ground, and the spraying device 5 efficiently spreads the sprayed material over a predetermined width to the crops in the paddy field or the field while self-propelled. I can do it.

The detailed configuration and operation of each part will be described below. First, the body frame 2 and its support structure, wheel transmission structure, and the like will be described. As shown in FIGS. 2 to 4, the body frame 2 connects two body side frames 20, which are main outer frames on the left and right sides of the body, with front and rear ends 21 and 23, 23a at front and rear ends. At the same time, the middle part is connected to the transmission case 4 by a downwardly U-shaped bracket frame 22 so that the position of the control unit 3 is set to the horizontal frame 2.
3, 23a.

Accordingly, the body frame 2 is formed in a rectangular rigid frame so as to enclose the transmission case 4 in a plan view, and is further provided with a mounting piece 20b at a rear portion of the maneuvering section 3 to be flattened. The storage tank 5b is installed detachably. Also, this aircraft frame 2
Has an auxiliary outer frame 20f extending parallel to the outside of the body side frame 20. The body frame 2 formed as described above can be easily disassembled and mounted on the front axle case 6a, the rear axle case 6b, the transmission case 4 and the like by the support structure 6 as described below. Can be supported in a stable state.

That is, a front axle case 6a connected to and supported by the left and right front wheels 1a is provided at a front portion of the body frame 2.
And the rear axle case 6b for connecting and supporting the left and right rear wheels 1b to the rear of the body frame 2 is detachably mounted and supported, so that both the axle cases 6a and 6b Side frames 20, 2
The axle cases 6a and 6b can be easily attached to and detached from both body side frames 20 from below by using mounting screws. ing.

Further, the front axle case 6a and the rear axle case 6b are attached to the ends of each case by four mounting pieces 20a projecting outward from the both body side frames 20, 20, respectively. The transmission output case 41 projects from the front of the transmission case 4 to the rear axle case 6b via a joint 41a and a connection shaft 42 from a traveling output shaft 41 protruding from the rear surface of the transmission case 4. Connected.
With this mounting structure, the front axle case 6
a can be detachably attached to the body frame 2 from the "front side" of the body, and the rear axle case 6b is detachably attached to the body frame 2 from the "rear side" of the body and connected to the body frame 2. Is available.

[0010] With this assembly structure, maintenance work such as disassembly and repair and cleaning of the machine body and assembling work can be performed efficiently and easily from the front and rear thereof without lifting the machine body significantly. In addition, the front axle case 6a and the rear axle case 6b are supported by the body side frame 20 near their respective ends, so that the front wheels 1a
In addition, the moment due to the reaction force (body weight) of the rear wheel 1b can be reduced as much as possible.
Moreover, it has features such as a stable support structure. The front axle case 6a and the rear axle case 6b of this embodiment can move the front wheel 1a and the rear wheel 1b up and down respectively at the ends of the case via a dumb-bar type longitudinal rotation support portion 60 of a conventional structure. It does not give a large impact to the fuselage even by unevenness or inclination of the ground during traveling, and can always maintain the horizontal attitude of the fuselage almost horizontally.
a so that the spraying operation can be performed properly.

As shown in FIGS. 5 and 6, a front steering cylinder 30 connects the left and right longitudinal rotation support portions 60 on the front axle case 6a side, and the left and right longitudinal axle cases 6b on the rear axle case 6b side. Is also connected by a rear steering cylinder 30. The front and rear steering cylinders 30, 30 are handles of a fully hydraulic power steering 31 provided at the shaft end of a handle 4a. By controlling the front wheel 1a and the rear wheel 1b by connecting and rotating the front wheel 1a and the rear wheel 1b at a desired cutting angle about the center of the vertical axis rotation support portion 60 by expanding and contracting by supplying the pressure oil based on the operation amount, Direction operation can be performed. In addition, 61 is an angle sensor that detects the cutting angle of the front wheel 1a and the rear wheel 1b.

Next, a support structure of the transmission case 4, a transmission structure thereof, an installation structure of the handle 3a, and the like will be described. In FIGS. 5 and 6, the transmission case 4 is fixed to the body frame 2 by a three-point support structure that connects both sides of the transmission case 4 and the upper portion thereof. That is, the upper portion of the transmission case 4 is fixed to the above-mentioned downwardly U-shaped bracket frame 22 for connecting the body side frames 20 provided on both sides of the transmission case 4 with mounting screws. The front axle case 6a is fixed to the case bracket 61a extending rearward from the front axle case 6a. The transmission case 4 can be easily removed from the body frame 20 only by loosening the three mounting screws, thereby facilitating maintenance work.

The transmission case 4 may be directly mounted from both sides of the body side frame 20. However, as shown in the illustrated example, the transmission case 4 is attached to the front axle case 6a.
The transmission case 4 is mounted so as to be fitted between the case brackets 61a, 61a projecting rearward from the main body frame 2 so that the machine body frame 2 has a processing distortion, a twist or the like at the time of welding or the like. Even if it is, it can be accurately positioned at an appropriate position without being directly affected by this. Therefore, the front and rear wheels 1
a, 1b and the spraying device 5 as a working device can be transmitted well, and the transmission case 4 is suspended in a state in which a point at the center of the transmission case 4 is suspended via the bracket frame 22 as described above. Since it is fixed, it can be stably supported without being greatly affected by the processing distortion of the body frame 2 or the like.

Further, according to the three-point support structure of the transmission case 4 configured as described above, the front axle case 6a and the transmission case 4 are assembled in a three-dimensional manner in advance, and this is inserted into the body side frame 20. However, there is an advantage that the parts of the mounting pieces 20a, 20a and the bracket frame 22 can be efficiently and firmly fixed by a simple assembling operation simply by fastening the mounting screws. As shown in FIG. 4, when the transmission operation systems such as the main transmission shifter 45, the sub transmission shifter 45a, and the work implement transmission shifter 46 are provided integrally on the front side of the transmission case 4, various operation levers ( (Not shown) and can be connected with good operability by a simple connection structure with a short distance. A work implement output shaft 47 protruding from the rear surface of the transmission case 4 is detachably connected to a belt transmission mechanism 49 via a joint 48a and a connecting shaft 48 as shown in FIG. The driving device 5c is driven.

On the other hand, with the above-described configuration,
As shown in FIG. 1, when the engine 1c is mounted and mounted on the front horizontal frame 21 and the fuselage side frame 20 immediately above the front axle case 6a, the transmission case 4 can be arranged at a lower rear portion of the engine 1c. Therefore, a large space can be formed behind the engine 1c and above the transmission case 4, so that the all-hydraulic power steering 31 is extended upward using the bracket frame 22 in this space. It can be attached to the frame 22a so as to be in a proper driving posture. By employing this all-hydraulic power steering 31, there is no need to provide a steering shaft below the conventional steering device, so that the lower and front sides of the power steering 31 can be easily opened. The transmission mechanism 10 composed of a belt and a pulley can be provided below the power steering 31 between the rear part of the engine 1c and the transmission case 4, so that the body can be configured with a margin while being compact.

Accordingly, a transmission case 4 is provided at a lower rear portion of the engine 1c, and a control unit 3 is provided.
The steering wheel 3a is an all-hydraulic power steering 31 and a transmission mechanism 10 for transmitting power from the engine 1c to the transmission case 4 is formed in a space formed below the power steering 31, so that the transmission 1 The transmission of the case 4 does not overhang on the engine 1c side by increasing the overall length of the body. Further, the dispersing portion 5a can be attached without shifting the machine center of gravity to the front side, and an operation system such as a shift shifter for operating the transmission case 4 is collectively provided at the front of the transmission case 4. As a result, there is an advantage that the operation system can be centralized at one place and the structure for linking with the operation levers can be simplified.

Next, the configuration of the seat 3b of the control section 3 and its surroundings will be described. First, the seat 3b is mounted and supported on an upper portion of a box frame 24 installed on the horizontal frame 23 at the center of the body frame 2 in the width direction (FIG. 1, FIG. 1).
2) By storing and installing the fuel tank 1e for the engine 1c in the box frame 24, the fuel tank 1e is provided on the body frame 2 so that the height above the ground can be increased as much as possible. I have to.

In the space formed on both sides of the seat 3b, there is provided a feed pump comprising a feed pump or the like for feeding a sprinkle such as a chemical solution contained in the storage tank 5b into the space on the left side thereof. An elevating valve 5v for an elevating cylinder 5s (FIG. 6), which will be described later, which raises and lowers the device 5c and the spraying unit 5a by hydraulic pressure is arranged. A switching valve (switching cock) 51 for switching and feeding to the spraying tube 50 of the spraying unit 5a constituting the spraying device 5 described later is arranged. With this configuration, the heavy structures are combined so that operability and maintenance work are improved at the central abdomen of the fuselage, and the weight balance between the left and right of the fuselage is adjusted to the fluctuation of the fuel in the fuel tank 1e and the dispersion of the spatter in the storage tank 5b. It is possible to improve without being greatly affected.

At this time, the feeding device 5 of the spraying device 5
c is positioned close to the storage tank 5b mounted and mounted on the mounting piece 20b of the body frame 2 behind the seat 3b, and is connected to the outlet thereof by a short delivery pipe 52 (FIG. 2). The feeding of the scattered material by the negative pressure generated when the feeding device 5c is driven is surely performed,
The negative pressure line resistance can be reduced.
Then, a long delivery pipe 53 provided in the delivery section of the feeding device 5c.
Is connected to the spraying pipe 50 of the spraying section 5a via the switching valve 51 in the middle thereof, and even if a long delivery pipe 53 is used, the sprayed material can be blocked by the static pressure of the feeding device 5c. Without spraying, the spray can be sprayed from the nozzle 50a of the spray pipe 50.

Accordingly, the feeding device 5c is provided near the storage tank 5b, connected to the storage tank 5b, and further connected to the feeding device 5c and the spraying portion 5a by the long delivery pipe 52, so that suction is performed. While reducing the pipeline resistance due to the negative pressure, there is an advantage that the spraying work can be reliably sent even by the long delivery pipe 52 by the static pressure and the spraying operation can be performed favorably. Further, the seat 3b of the control section 3 is provided substantially at the center of the body width, and the seat 3b is provided.
b, a fuel tank 1e is installed in a space formed below,
Since the feeding device 5c and the switching valve 51 for the scattered material sent from the feeding device 5c are arranged in the space formed on both sides of the seat 3b in a distributed manner, the center of gravity accompanying the fluctuation of the fuel is provided. It is characterized in that the running and the spraying operation can be performed smoothly by suppressing the fluctuation of the air conditioner.

Further, the feeding device 5c and the elevating valve 5v
A handle 9 for getting on and off is provided upright from the body frame 2 on the outside of the switching valve 51 and on the outside of the switching valve 51. An auxiliary step 20s is provided on an auxiliary outer frame 20f on both sides of the seat 3b, so that the operator Easy to get on and off. In this embodiment, the handle 9 is provided with a movable boom 55 for folding the sprinkling portion 5a in the middle thereof as shown in FIGS.
By providing a receiving member 90 that can stably receive and support the “a” in the retracted posture, a simple configuration can be used for both.

The battery 91 for the engine 1c is attached to the left auxiliary step 20s in consideration of the weight balance. A microcomputer unit 92 for controlling the electrical control of each unit is provided below the left handle 9 (FIG. 2). The microcomputer unit 92 and various harnesses 93 (see FIGS. 5 and 5) wired to the control unit 3 are provided on the body side frame 20 on the right side of the body frame 2 formed in a rectangular shape.
6) is provided by interpolation, and the auxiliary outer frame 2 on the left side is provided.
At 0f, the oil pipes 95 of the hydraulic system are provided along the oil pipes, so that the positions of the pipes and the wiring can be maintained and checked easily, so that maintenance work can be easily performed. Note that the hydraulic pump 96 of each hydraulic device is connected to the engine 1c.
It is provided integrally on the side.

Next, the traveling work vehicle 1s configured as described above
The means for installing the spraying device 5 in the apparatus will be described. The spraying device 5 includes a storage tank 5b, a feeding device 5c, and a switching valve 51.
Is installed as described above, and the spraying portion 5a has a well-known structure, and expands and contracts the elevating cylinder 5s (FIG. 6) on columns 21a (FIG. 1) erected on the left and right sides of the front horizontal frame 21. The lifting link 54 of the parallel link type, which is operated up and down by, is provided, and the left and right lifting links 54 are connected by a fixed boom 55.

On both sides of the fixed boom 55, the movable boom 55a is configured to be switchable from a storage position shown by a solid line in FIG. 2 to an extended working position shown by a dotted line. A spray pipe 50 with a nozzle connected to the delivery pipe 53 is provided along the entire length, and the spray section 5a is lowered to expand and extend the movable boom 55a. In the working posture, the nozzle of the spray pipe 50 faces downward. Thus, it is possible to satisfactorily spray a predetermined sprayed article. It should be noted that the switching of the supply of the scattered articles to the scatter pipes 50 mounted on the fixed boom 55 and the movable boom 55a can be appropriately performed by the switching valve 51.

Next, the spraying vehicle 1 constructed as described above is used.
A pest control operation in which a chemical solution is stored in a storage tank 5b as a spraying substance to control rice cultivation in a paddy field will be described. To run. And the feeding device 5
With the driving of c, the scattered material in the storage tank 5b is sucked out through the delivery pipe 52, is pressure-fed to the scatter pipe 50 via the switching valve 51 and the delivery pipe 53, and is evenly distributed from the nozzle to a plurality of rice plants. And can be efficiently controlled.

At this time, the engine 1c and the storage tank 5
In order to prevent overhang, the overall length of the fuselage is reduced, and a fuel tank 1e is provided below the seat 3b so as to be positioned directly above the front axle case 6a and the rear axle case 6b. 5c and the switching valve 51 are arranged in a well-balanced manner, so that it is possible to prevent the deterioration of the running performance even with the fluctuation of the fuel and the scattered material, and to smoothly perform the work for controlling the paddy field where the airframe easily sinks. Is what you can do. In this embodiment, the spraying work vehicle 1 for spraying the chemical liquid is shown. However, the present invention is not limited to this. By changing the configurations of the feeding device 5c and the spraying tube 50, the liquid or powdery fertilizer can be sprayed. It may be. The traveling work vehicle 1s according to the present invention is not limited to the spraying device 5, but can be used by being mounted on another work device.

[0027]

As described above, in the spraying work vehicle according to the present invention, the feeding device 5c is provided close to the side of the storage tank 5b, so that the negative pressure resistance at the time of sucking the sprayed object can be reduced. It can be reduced as much as possible to improve the spraying capacity. The fuel tank 1e is provided in the space below the seat 3b provided at the center of the body width, and the feed device 5c and the switching valve 51 are arranged side by side in a distributed manner, so that the fuel tank 1e and the engine are controlled. Since the total length with the part 3 can be shortened, it is possible to install the storage tank 5b without increasing the overall length of the body or greatly overhanging. In addition, a smooth running and spraying operation can be performed while suppressing a change in the center of gravity due to a change in the storage amount of the fuel and the sprayed object.

[Brief description of the drawings]

FIG. 1 is a side view of a spraying work vehicle according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing a configuration of a body frame of the traveling work vehicle shown in FIG. 1;

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a side view showing a configuration of a main part of the traveling work vehicle of FIG. 1;

FIG. 6 is a plan view of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spreading work vehicle 1a Front wheel 1b Rear wheel 1c Engine 1e Fuel tank 1s Traveling work vehicle 2 Body frame 3 Operating part 3a Handle 3b Seat seat 4 Transmission case 5 Spreading device 5a Spreading part 5b Storage tank 5c Feeding device 5s Lifting cylinder 6 Structure 6a Front axle case 6b Rear axle case 9 Handle 10 Transmission mechanism 20 Body side frame 22 Bracket frame 31 Power steering 42 Connecting shaft 50 Spreading tube 51 Switching valve 52, 53 Delivery tube

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shuji Tanaka 667, Iya-cho, Oji-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 F-term in Mitsubishi Agricultural Machinery Co., Ltd. (Reference) 2B121 CB01 CB02 CB24 CB33 CB42 CB47 CB51 CB53 CB56 CB61 CB66 EA26

Claims (2)

[Claims] 1. A spraying unit 5a for spraying a sprinkled object such as a chemical solution, a control unit 3, and a storage tank 5b for accommodating the sprinkled object in a front-rear direction of a body frame 2 having a front wheel 1a and a rear wheel 1b.
And a spraying work vehicle for spraying the sprayed material in the storage tank 5b to the spraying portion 5a with a feeding device 5c such as a liquid pump, and spraying the spraying device with the spraying portion 5a. A spraying work vehicle disposed between the storage tank 5b and in the vicinity of the storage tank 5b and having the feeding device 5c and the spraying portion 5a connected by a delivery pipe 53. 2. A seat 3b of the control section 3 is provided substantially at the center of the body width, a fuel tank 1e is installed in a space formed below the seat 3b, and formed on both sides of the seat 3b. A feeding device 5c in the space to be
The spraying work vehicle according to claim 1, wherein the switching valve (51) for the sprayed object delivered from the feeding device (5c) is arranged in a distributed manner.