JP2000093063A - Chemical-scattering vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the weight balance of a vehicle body in the front and rear direction good and improve the traveling stability by installing a body frame between a right and left pair of crawler type traveling parts, and arranging a chemical tank at the rear position of a motor part, and a chemical-scattering apparatus at the front part. SOLUTION: A body frame 2 is installed between a right and left pair of crawling type traveling parts 1L, and a driving part 5 is arranged at the front part on the body frame 2. A motor part 3 is arranged at the rear position of the driving part 5. A chemical tank 8 is arranged at the rear position of the motor part 3 and a chemical-scattering apparatus 9 is arranged at the front part of the body frame 2 to provide the chemical-scattering vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medicine spraying vehicle.

[0002]

2. Description of the Related Art Conventionally, as one form of a medicine spraying vehicle, a medicine tank and a medicine spraying device connected to and connected to the medicine tank are provided at a rear portion of a traveling body having wheel-type paddy wheels. There is.

[0003] In this way, the medicine is sprayed on the young seedlings vegetated in the paddy field by the drug spraying device while the traveling vehicle is running in the paddy field.

[0004]

However, in the above-mentioned medicine spraying vehicle, since the medicine tank and the medicine spraying device are arranged at the rear portion of the traveling vehicle body, the load acting on the rear wheels of the traveling vehicle body is large. As a result, there is a problem that the front-rear weight balance of the traveling vehicle body is deteriorated and the traveling stability cannot be maintained satisfactorily.

Further, when the traveling vehicle body is rotated (U-turn) in the traveling area in the paddy field, the rear wheels are stopped on the cultivator to stop and rotate the traveling side rear wheel. It turns while slipping, and the rear wheel width is small and the ground contact pressure is large, so there is a problem that paddy fields in the traveling area are damaged.

At this time, since a large load acts on the rear wheels as described above, the paddy fields in the circling region by the rear wheels are seriously damaged.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a medicine dispersing vehicle having a medicine tank and a medicine dispersing device communicatively connected to the medicine tank. The vehicle body frame is interposed, the driving unit is disposed at the front part on the vehicle body frame, the motor unit is disposed at the rear position of the driving unit, and the medicine tank is disposed at the rear position of the motor unit. On the other hand, it is an object of the present invention to provide a medicine spraying vehicle characterized in that a medicine spraying device is provided at a position in front of a vehicle body frame.

The present invention also has the following configuration.

A driver's seat is provided in the driver, and the driver's seat is disposed near a turning center line of a spin turn in which a pair of left and right running units operate to move in opposite directions to turn the vehicle body. .

[0010] The pair of left and right traveling parts have driven wheels attached to the front and rear ends of a traveling frame extending in the front and rear direction, respectively, and a pair of left and right driving wheels are interlocked to a transmission part arranged substantially at the center of the body frame. Install each drive wheel and front
A crawler belt has been wound between the rear driven wheel.

[0011] A pair of front and rear support frames are raised upward from the traveling frame of the traveling section, and each support frame is bent inward from the midway portion, and a body frame is continuously provided at the tip of each support frame. The drive wheels are arranged between the pair of support frames.

[0012] The pair of front and rear support frames are set so that the ground height of a portion located within the crawler belt width is at least higher than the ground height of the young seedlings vegetated in the paddy field.

[0013] The crawler belt width of the running section is set to be less than half of that between the young seedlings vegetated in the paddy field.

[0014]

Embodiments of the present invention will be described below.

That is, the medicine spraying vehicle according to the present invention includes a medicine tank and a medicine spraying device connected to the medicine tank, and a vehicle body frame is interposed between a pair of right and left crawler-type running parts. Then, an operating unit is arranged at the front part on the body frame, and a motor unit is arranged at the rear position of the operating unit,
The medicine tank is arranged at a position behind the motor unit, and a medicine spraying device is arranged at a position in front of the vehicle body frame.

[0016] In this manner, the front-to-back weight balance of the vehicle body can be ensured well, and the running stability can be improved.

In addition, since the traveling section is of the crawler type, the contact pressure can be reduced as compared with the wheel type, so that the paddy field can be prevented from being damaged.

Further, since the medicine spraying device is disposed at the front position of the vehicle body, the operator sitting on the driving unit can
While visually checking the spraying status of the drug by the drug spraying device,
The steering operation can be performed, and the safety and reliability of the medicine spraying operation can be ensured.

A driver's seat is provided in the driving section, and the driver's seat is disposed near a turning center line of a spin turn in which a pair of left and right running sections operate to move in opposite directions to turn the vehicle body. are doing.

In this manner, when the vehicle body makes a spin turn, the operator sitting in the driver's seat can perform the spraying operation of the medicine without worrying about the swing and without fear. .

A pair of left and right running parts have driven wheels attached to the front and rear ends of a running frame extending in the front and rear direction, respectively, and a pair of left and right driving wheels are attached to a transmission part arranged substantially at the center of the body frame. Crawler tracks are wound between each drive wheel and the front and rear driven wheels in an interlocking manner.

In this manner, a large ground clearance of the vehicle body frame can be ensured, and the vehicle can be spread over the young seedlings vegetated in the paddy field, and the chemical spraying operation can be performed without damaging the young seedlings. Can do it.

In addition, a pair of front and rear support frames are raised upward from the traveling frame of the traveling section, and each support frame is bent inward from the middle part, so that a body frame is continuously provided at the tip end of each support frame. The drive wheels are arranged between a pair of front and rear support frames.

In this manner, the vehicle body frame can be reliably supported on the pair of left and right traveling frames via the pair of front and rear support frames, and the drive wheels are protected from the front and rear direction by the pair of front and rear support frames. Can be.

Further, the pair of front and rear support frames are set so that the ground height of the portion located within the crawler belt width is at least higher than the ground height of the young seedlings vegetated in the paddy field.

In this way, the supporting frame does not interfere with the young seedling, and the young seedling can be prevented from being damaged by the supporting frame.

The crawler belt width of the running part is set to be less than half of that between young seedlings vegetated in paddy fields.

In this way, even when the running section moves between the plants of the young seedling, the young seedling is laid down by the crawler belt of the running section or the mud extruded laterally as the crawler track sinks. And the like can be prevented.

[0029]

Embodiments of the present invention will be described below with reference to the drawings.

A shown in FIGS. 1 to 3 is a medicine spreading vehicle according to the present invention. The medicine spreading vehicle A has a vehicle body frame 2 interposed between a pair of left and right crawler-type running parts 1L and 1R. On the vehicle body frame 2, a motor unit 3, a transmission unit 4, an operation unit 5, a hydraulic oil tank 6, a fuel tank 7, a medicine tank 8, and a medicine spraying device 9 are provided. G is a paddy field, N is a paddy field G
It is a young seedling that has been vegetated.

The running portions 1L, 1R are composed of running frames 10L, 10R formed by extending in the front-rear direction, and running frames 10L, 10R.
Drive wheels 11L, 11R interlockingly connected to a rear transmission case 42 described later at a position above the middle part of R, and driven wheels 12L, 12 attached to the front and rear ends of the traveling frames 10L, 10R, respectively.
R, 13L, 13R, the crawler belts 14L, 14R wound around these to form the vertices of the triangle, and the lower side of the traveling frames 10L, 10R to guide the lower turning sides of each crawler belt 14L, 14R. It has guide rollers 15L, 15R and equalizers 16L, 16R attached to the sections.

The lower ends of a pair of front and rear support frames 17L, 17R, 18L, 18R are attached to the respective traveling frames 10L, 10R, and the respective support frames 17L, 17R, 18L, 18R are raised substantially vertically upward. Each support frame 17L, 17R, 18L, 18R is bent inward from the middle part, and the body frame 2
Are linked.

In this manner, a large ground clearance of the vehicle body frame 2 can be ensured, and the vehicle travels across the young seedlings N vegetated in the paddy field G without damaging the young seedlings N. A medicine spraying operation can be performed.

The drive wheels 11L and 11R are arranged between a pair of front and rear support frames 17L, 17R, 18L and 18R.

In this manner, a pair of left and right running frames is provided.
A pair of front and rear support frames with the body frame 2 on 10L and 10R
The support wheels 17L, 17R, 18L, 18R can be reliably supported, and the pair of front and rear support frames 17L, 17R, 18L, 18R can protect the drive wheels 11L, 11R from the front-rear direction.

Then, as shown in FIG. 3, the pair of front and rear support frames 17L, 17R, 18L, 18R have crawler belt widths (left and right widths) W2, W
2 The ground clearance H2 in the middle part located within
The ground height of the portion extending inward from the 14R is at least the ground height H1 (for example, 60 c
m).

Thus, the support frames 17L, 17R, 18
L and 18R do not interfere with the young seedling N, and the young seedling N can be prevented from being damaged by the support frames 17L, 17R, 18L and 18R.

The track width W2 of the track 14L, 14R is the paddy field G
Is set to less than half of the inter-strain W1 of the young seedlings N vegetated in the area.

Thus, the running section W1 between the young seedlings N is
When the 1L, 1R moves, the crawler tracks 14L, 14
It is possible to prevent problems such as the young seedlings N falling down due to the mud g extruded laterally with the settlement of the crawler belts 14L and 14R.

As shown in FIGS. 1 and 6, the body frame 2 is provided with a pair of left and right body frame forming bodies 2aL and 2aR extending in the front-rear direction and having a U-shaped cross section.

The prime mover unit 3 is disposed at the front of the vehicle body frame 2 and has the engine E as a main part.
Coated with 41.

The transmission section 4 is, as shown in FIG. 6, a rear transmission case disposed at the center of the body frame 2.
42 and a front transmission case 43 disposed at the front of the vehicle body frame 2 are linked by a transmission mechanism 44, and a lower part of the case bodies 46 and 45 of the two transmission cases 43 and 42 is connected to a communication pipe 47 such as a rubber hose. Are connected to each other.

Here, the front and rear transmission cases 43, 42
Are also used as operating hydraulic tanks, and the two transmission cases 43 and 42 are connected by a communication pipe 47 so that the level of the oil level stored in the two transmission cases 43 and 42 is kept uniform. When refueling is performed from one of the mission cases, refueling can be performed on both of the mission cases.

In front of the rear transmission case 42, a turning HST 50 as a steering speed change means including a variable displacement hydraulic pump (not shown) and a constant displacement hydraulic motor (not shown) is provided. The charge pump P1 is interlocked and connected to the front side of the turning HST 50, and a variable displacement hydraulic pump (not shown) and a constant displacement hydraulic motor (not shown) are provided behind the front transmission case 43. HST51 for straight running as a speed change means for straight running having
A servo pump P2 is interlocked and connected behind the HST 51 for straight traveling.

In addition, the variable displacement hydraulic pump of the HST 50 for turning, the charge pump P1, the servo pump P2 and the H
The variable displacement hydraulic pump in ST51 is connected in series with the engine E via a flywheel 52, a first transmission mechanism 53, and a second transmission mechanism 54 in series.

As shown in FIG. 6, the rear transmission case 42 has a pump driving input gear 60 interlockingly connected with a first transmission mechanism 53 in a case body 45, and meshes with the input gear 60. An output gear 61 for driving the pump interlockingly connected to the input shaft of the variable displacement hydraulic pump of HST50;
A turning input gear 62 operatively connected to the output shaft of the constant displacement hydraulic motor of ST50, a turning output gear 63 meshed with the input gear 62, and a forward / reverse gear mechanism 64 operatively connected to the output gear 63; And left and right planetary gear mechanisms 65L and 65R operatively connected to the forward / reverse gear mechanism 64, and left and right traveling transmission shafts 66L and 66R operatively connected to the respective planetary gear mechanisms 65L and 65R.

The forward / reverse rotation gear mechanism 64 includes a pair of left and right turning steering shafts 67L, 67R, and a passive passive bevel gear 68L, 68R attached to the inner end of each turning steering shaft 67L, 67R. A rotating driving bevel gear 69 meshing with the passive bevel gears 68L, 68R, a driving shaft 70 supporting the driving bevel gear 69 and being operatively connected to the turning output gear 63, and a right turning steering shaft 67R. Multi-plate hydraulic brake unit 71 attached to the right end, and each turning steering axis
Output spur gears 72L, 72R attached to the outer ends of 67L, 67R.

The left and right planetary gear mechanisms 65L and 65R are gear support shafts.
73L, 73R, sun gears 74L, 74R integrally formed with input spur gears coaxially mounted on each gear shaft 73L, 73R, output gear 75L,
75R and gauges 76L and 76R, planetary gears 77L and 77R attached to each gauge 76L and 76R, and an intermediate shaft 78 rotatably mounted between the two gear support shafts 73L and 73R on the same axis.
And attached to the left and right sides of the intermediate shaft 78 respectively.
Ring gear 79 meshed with planetary gears 77L and 77R
L, 79R, a linear drive bevel gear 80 attached to the center of the intermediate shaft 78, and a linear drive bevel gear 81 meshed with the passive bevel gear 80 and operatively connected to the front end of the transmission mechanism 44. Is provided.

The left and right traveling transmission shafts 66L and 66R are connected to the case body.
Each drive shaft is inserted through drive shaft cases 85L and 85R formed by extending left and right sides from the lower left and right sides of 45, respectively.
Input gears 86L, 86R meshing with the output gears 75L, 75R are attached to the inner ends of the 66L, 66R.

The drive shaft cases 85L, 85R are respectively attached to the support brackets 88L, 88A on the vehicle body frame forming bodies 2aL, 2aR.
It is connected and supported by connecting bolts 89, 89 via R.

In addition, the right vehicle body frame forming body 2Ra has an opening at a position matching the outside of the brake portion 71.
The opening 90 is opened, and the opening 90 is closed by a right-side support bracket 88R so as to be openable and closable, so that the support bracket 88R also functions as a lid of the opening 90.

Here, the brake portion 71 can be easily taken out by detachably attaching a detachable lid 71a to the side facing the opening portion 90 with bolts 91 and removing the internal multi-plate 71b and the like by removing the detachable lid 71a. If possible, maintenance and the like can be performed easily.

Final cases 27L and 27R are interlocked to the left and right drive shaft cases 85L and 85R, respectively.

In FIG. 6, 103L and 103R are final input shafts, 104L and 104R are final output gears, and 105L and 105R.
Is the traveling drive shaft, 106L and 106R are the final input gears, 107
L and 107R are drive wheel attachments.

As shown in FIG. 7, the front transmission case 43 has a straight input shaft 110, a straight intermediate shaft 111, and a straight output shaft 112, which are horizontally laid in a case body 46 in parallel with each other. The shafts 110, 111, 112 are connected to the first to seventh straight transmission gears 113,
Linked via 114,115,116,117,118,119,
The straight input shaft 110 is connected to the hydraulic straight clutch unit 12 by the output shaft 120 of the constant displacement hydraulic motor Mb of the straight HST 51.
1, while the output shaft 112 for straight traveling is operatively connected to the transmission mechanism 44. Reference numeral 122 denotes a straight traveling brake unit, and 123 denotes a straight traveling transmission unit.

As shown in FIG. 7, the PTO input shaft 125 and the PTO intermediate shaft 126 are provided in the case body 46.
And the PTO shaft 127 are laid horizontally in parallel, and
5,126,127 to the first to eighth PTO transmission gears 128,129,130,
131,132,133,134,135
The input shaft 125 for O is connected to a drive shaft 136 directly connected to the engine E to drive the variable displacement hydraulic pump Pb.
It is interlocked and connected via an O clutch 137. 138 is a PTO transmission section.

As shown in FIGS. 1, 2 and 8, the driving section 5 has a dashboard 140 and a handle column 141 integrally connected to the front end of the hood 41, and the handle column 141 has a rear side. A handle post 142 is provided, and a front handle post 143 is provided at the front of the vehicle body frame 2, and one steering handle 144 is attached to the front and rear handle posts 143, 142 so as to be freely replaceable. The driver's seat 145 is provided between the supports 143 and 142, and the driver's seat support 146 is provided.
The driver's seat 145
Forward-facing driving operation performed by sitting forward on the
It is possible to select a rearward driving operation mode in which the driver is seated rearward.

Then, as shown in FIG. 8, the rear handle support 142 is provided in the middle of the body frame 2 at a box stay.
The steering shaft 1 is connected to the fixed rear steering box 148 via the 147, and the input shaft 149 projecting upward from the rear steering box 148 is connected to the steering shaft 1.
The lower end of the cylindrical steering shaft 151 is connected to the lower end of the cylindrical steering shaft 151 via the universal joint 162, the lower end of the cylindrical steering shaft 151 is connected to the upper end of the steering shaft 150, and the steering handle 144 is connected to the upper end of the cylindrical steering shaft 151. The handle shaft 152 attached to the steering shaft 144 is freely inserted and removed, and the lower end of the handle shaft 152 is spline-fitted to the steering shaft 150 via a spline connection body 153 so that they can be linked and connected to each other. The rear handle support 142 forms a rear steering means. 154 is a cap.

As shown in FIG. 8, the front handle support 143 is provided on the box support base 155 at the front of the body frame 2.
The front steering box 156 is connected to a fixed front steering box 156 via the steering wheel 144 and the steering handle 144 and the front steering column.
143 together with the front steering means. 157 is the input shaft, 158 is the steering shaft, 159
Is a tubular steering shaft, 160 is a spline joint, and 161 is a universal joint.

The rear steering box 148 and the front steering box 156 have the same basic structure. Pinion gears 165, 165 are attached to the input shafts 149, 157, respectively. Axis 167,16
8, the sector gear support shafts 167, 168 are projected downward, and the base ends of the operating arms 169, 170 are attached to the lower ends of the sector gear support shafts 167, 168.

The operating arm 169 of the rear steering box 148 is connected to the turning HST as shown in FIG.
It is linked to a trunnion arm 171 linked to a swash plate provided on the 50 variable displacement hydraulic pumps via a turning link mechanism 172 as steering transmission means so that a turning operation of the vehicle body can be performed. I have.

Further, the interlocking arm 173 is attached to the operating arm 169 of the rear steering box 148 by a sector gear support shaft.
The operating arm 170 of the front steering box 156 is connected to the interlocking arm 173 via a turning interlocking wire 174 as a steering interlocking means.

In this manner, the swash plate (not shown) provided on the variable displacement hydraulic pump of the turning HST 50 is also operated by the front steering means via the turning link mechanism 172 to turn the vehicle body. The operation can be performed.

That is, in conjunction with the turning angle of the steering handle 144 provided on the driving section 5, the pair of left and right traveling sections 1L and 1R are respectively accelerated and decelerated, and one of the traveling sections 1L and 1R is operated.
A gentle turn where 1L (1R) is decelerated, a pivot turn where one running section 1L (1R) stops, and one running section 1L (1R) proceeds in the opposite direction to the other running section 1R (1L) The vehicle body can be turned in any of the forms of spin turns that operate in a desired manner.

The front handle support 143 is formed so as to protrude upward from the front part of the vehicle body frame 2.
A useable position (a) and a storage position (b) tilted rearward by interposing a foldable connecting member 181 between
The position can be freely changed between and.

The above-mentioned driver's seat support 146 has a vertically extending and retracting column 182 as a column standing on a floor 190 formed in the driving section 5, and an overhanging upper end of the vertically extending and retracting column 182. 184 is a lifting stopper pin, 185 is a rotating stopper pin, 186 is a rotating stopper pin operating lever, 187 is a lifting cylinder, and 188 is a lifting operating lever. .

As described above, in the forward driving operation mode, the elevating telescopic support column 182 is fixed in the extended state,
The swivel base 183 is swiveled and fixed so that the driver's seat 145 placed on the swivel base 183 faces forward, while in the rearward operation mode, the up-and-down telescopic column 182 is fixed in a shortened state, and The swivel base 183 can be swiveled and fixed so that the driver's seat 145 placed on the base 183 faces rearward.

At this time, the turntable 183 is moved up and down
In the driving operation state, the space between the driver's seat 145 and the steering handle 144, that is, the driving operation space can be appropriately secured in each driving operation state. As a result, the operator can easily perform the driving operation and reduce fatigue.

As shown in FIGS. 2 and 9, the driver 5 has an accelerator pedal 191 and a brake pedal 192 close to each other on the right side of the rear of a floor 190 formed below the driver's seat 145. On the other hand, an accelerator pedal 193 is disposed on the right side of the front of the floor 190, and a brake pedal 194 is disposed on the left of the front of the floor 190.

The accelerator pedal 191 on the rear side is linked to an accelerator operating shaft 195, and is connected to the accelerator operating shaft 195.
Is connected to an accelerator lever 196 attached to the left side wall of the handle column 141 via an accelerator interlocking mechanism 197,
The accelerator lever 196 is connected to the engine E by the accelerator wire 19
8 and linked together.

Further, an accelerator operating shaft 195 linked to the rear accelerator pedal 191 and a front accelerator pedal 195 are provided.
When the accelerator pedal 193 on the front side is depressed by operating an accelerator interlocking wire 200 as an accelerator interlocking means between the accelerator shaft 199 interlocked with the accelerator pedal 193 and the rear accelerator pedal 193, The accelerator operation can be performed in the same manner as when the 191 is depressed.

The rear brake pedal 192 is interlocked with a rear brake support shaft 201, and a brake operating arm 202 is connected to the brake support shaft 201 in an interlocking manner. The brake unit 122 is interlocked and connected.

Further, a rear brake interlocking arm 203 is interlockedly connected to the rear brake support shaft 201, and a front brake interlocking arm 205 is interlockedly connected to the front brake support shaft 204 which is interlocked with the front brake pedal 194. When the front brake pedal 194 is depressed by interposing a brake interlocking wire 206 as a brake interlocking means between the two brake interlock arms 203 and 205, the rear brake pedal 192 is also depressed. The brake operation can be performed in the same manner as in the case where the brake operation is performed.

As shown in FIG. 9, the front accelerator pedal 193 and the brake pedal 194 are arranged within the projected area below the driver's seat 145 in the rearward driving operation mode.

As shown in FIGS. 1 and 2, the driver's seat 145 is disposed on a floor 190 substantially continuous in the left-right direction.
Open space 208, 209 in both left and right directions of the driver's seat 145
To form an open space 20 from either the left or right direction of the vehicle body.
You can easily get on and off through 8,209.

Further, as shown in FIG. 1, the driver's seat 145 is located near a turning center line C of a spin turn in which the pair of left and right running parts 1, 1 are operated to move in opposite directions to turn the vehicle body. Has been placed.

As described above, when the vehicle body makes a spin turn, the operator sitting in the driver's seat 145 can carry out the medicine spraying operation without being swung largely and without feeling fear. it can.

In the forward operation mode, the hydraulic oil tank 6 is disposed on the right side of the driver's seat 145, and the sub-transmission lever 210 and P
While the TO shift lever 211 is disposed, the fuel tank 7 is disposed on the left side, and the main shift lever 212, the position lever 213, the sub control lever 214, and the control box 215 are disposed inside the fuel tank 7. It is arranged.

The levers 210, 211, 212, 21
No. 3,214 allows operation not only in the forward driving operation mode but also in the backward driving operation mode.

As shown in FIGS. 1 and 2, the chemical tank 8 is mounted on the auxiliary frame 220 by extending the auxiliary frame 220 rearward from the rear end of the body frame 2. The tank 8 has a tank body 221 disposed immediately behind the bonnet 41 and a left and right extension formed by extending forward from the left and right sides of the tank body 221 along the left and right side walls of the bonnet 41. From the part forming bodies 222 and 223, they are formed in a U-shape in plan view.

Thus, the capacity of the medicine tank 8 is formed as large as possible.

The medicine spraying device 9 is shown in FIGS.
As shown in FIG.
225 is an upper connector 226 and a pair of left and right lower connectors 227, 227.
To the device support frame 225 and the chemical tank 8
Pump 228 that is in communication with the pump, and a pumping fan 22 that pumps the drug discharged from the pump 228.
9 and a spraying unit 230 for spraying the medicine pumped from the pumping fan 229 onto the young seedlings N.

As shown in FIG. 4, the medicine discharging pump 228 has a transmission case 231, a pump transmission shaft 232, a deceleration case 233, and a pump transmission belt 234 on a PTO shaft 127.
And are interlocked and linked. 235 is the input pulley, 236
Is an output pulley, 237 is an interlock belt, 238 is an output pulley for a pump, and 239 is an input pulley for a pump.

As shown also in FIG.
Transmission case 231 and transmission shaft for fan on PTO shaft 127
240 and a fan transmission belt 241 for interlocking connection. 242 is a fan output pulley, and 243 is a fan input pulley.

In the spraying section 230, an elevating mechanism 250 is mounted on the apparatus supporting frame 225, a vertical swing mechanism 251 is mounted on the lifting mechanism 250, and a spray pipe 252 is mounted on the vertical swing mechanism 251.

The elevating mechanism 250 has a slide 253 mounted on an apparatus support frame 225 so as to be slidable up and down.
Elevating cylinder 254 with 253 mounted on device support frame 225
Can be moved up and down.

The vertical swing mechanism 251 pivotally supports the center of a swing arm 255 extending in the left-right direction at the center of the slide body 253 by a pivot 256 whose axis is oriented in the front-rear direction. A swing cylinder 257 is interposed between the right side of 255 and the device support frame 225. 258 is a damper for absorbing shock.

Here, the swinging cylinder 257 expands and contracts by detecting that the posture of the device support frame 225 has changed due to the unevenness of the cultivator in the paddy field, and the posture of the spray pipe 252 is held horizontally. Thus, the posture is controlled via the control box 215.

The base ends of the pivoting arms 259, 259 are pivotally supported on the left and right ends of the swing arm 255 via pivots 260, 260 whose axes are directed vertically.
Rotating cylinders 261, 261 are interposed between 5,259,259. 262 is a stored state holding spring.

The spraying pipe 252 extends in the left-right direction and is attached to the swing arm 255.
Are connected to the left and right ends of the fixed-side pipe forming body 265 via flexible connecting bodies 266, 266, and the rotating arms 259, 25
9 and a first movable side pipe forming body 267, 267, and a base end connected to a distal end of each first movable side pipe forming body 267, 267 via a flexible connecting body 268, 268. And a second movable-side pipe forming body 270, which is connected so as to be able to be folded back.

In each of the pipe forming bodies 265, 267, 270, a medicine spraying nozzle 271 is formed at regular intervals in the longitudinal direction, and an air blowing hole 272 is formed between the nozzles 271, 271.

In this manner, the spraying section 230 allows the spraying pipe 252 to be adjusted as appropriate by the elevating mechanism 250 so that the spraying pipe 252 can be adjusted up and down as needed. To be able to hold.

The spraying pipe 252 rotates between a use posture in which the first movable-side pipe forming bodies 267, 267 are extended in the left-right direction by the rotation cylinders 261 and 261 and a storage posture along the side of the vehicle body. Then, the posture can be freely changed, and the second movable-side pipe forming bodies 27 and 270 are changed to the first movable-side pipe forming bodies 267 and 267.
The posture is freely changed by rotating between a use posture extending in the same extension direction as 267 and a storage posture folded back so as to overlap the upper side surfaces of the first movable-side pipe forming bodies 267, 267.

In this embodiment, the vehicle body frame 2 is interposed between the pair of left and right crawler traveling parts 1L and 1R, and the driving part 5 is disposed at the front part on the vehicle body frame 2 to perform the same operation. Since the prime mover unit 3 is disposed at the rear position of the unit 5 and the medicine tank 8 is disposed at the rear position of the prime mover unit 3, the medicine spraying device 9 is disposed at the front position of the vehicle body frame 2. Thus, the front-to-back weight balance of the vehicle body can be ensured well, and the running stability can be improved.

Further, since the traveling portions 1L and 1R are of the crawler type, the contact pressure can be made smaller than that of the wheel type, so that the paddy fields can be prevented.

Further, since the medicine spraying device 9 is disposed at the front position of the vehicle body, the operator sitting on the driver's seat 145 of the driving section 5 can visually check the spraying state of the medicine by the medicine spraying device 9. The steering operation can be performed, and the safety and reliability of the medicine spraying operation can be ensured.

[0097]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, a vehicle body frame is interposed between a pair of right and left crawler traveling parts, and an operating part is disposed at a front part on the vehicle body frame, and a rear position of the driving part is provided. The motor unit is arranged in the motor unit, and the medicine tank is arranged at the rear position of the motor unit, while the medicine spraying device is arranged at the front position of the body frame, so that the front-rear weight balance of the vehicle body is improved. As a result, running stability can be improved.

Moreover, since the traveling section is of the crawler type, the contact pressure can be reduced as compared with the wheel type, so that the paddy fields can be prevented.

Further, since the medicine spraying device is disposed at a position in front of the vehicle body, the operator sitting on the driving unit can
While visually checking the spraying status of the drug by the drug spraying device,
The steering operation can be performed, and the safety and reliability of the medicine spraying operation can be ensured.

According to the second aspect of the present invention, a driver's seat is provided in the driving unit, and the driver's seat is a spin turn that turns the vehicle body by operating the pair of left and right traveling units to move in opposite directions to each other. Since it is located near the turning center line, when the vehicle spins, the operator sitting in the driver's seat does not swing around greatly, does not feel fear, and sprays medicine without worry Can be performed.

According to the third aspect of the present invention, the pair of right and left traveling parts have driven wheels attached to the front and rear ends of a traveling frame extending in the front and rear direction, respectively, while the transmission part is disposed substantially at the center of the body frame. A pair of left and right drive wheels are linked and connected to each other, and a crawler belt is wound between each drive wheel and the front and rear driven wheels, so that a large ground clearance of the body frame can be secured, It is possible to run while straddling the young seedlings that are vegetated, and perform the spraying operation without damaging the young seedlings.

According to the fourth aspect of the present invention, the pair of front and rear support frames are raised upward from the traveling frame of the traveling section, and each support frame is bent inward from the middle part, so that the front end of each support frame is bent. Since the vehicle body frames are connected to each other and the drive wheels are arranged between the pair of front and rear support frames, the body frames can be reliably supported on the pair of left and right traveling frames via the pair of front and rear support frames. At the same time, the drive wheels can be protected from the front-rear direction by the pair of front and rear support frames.

According to the fifth aspect of the present invention, the pair of front and rear support frames are set so that the ground height of the portion located within the crawler belt width is at least higher than the ground height of the young seedlings vegetated in the paddy field. Therefore, the supporting frame does not interfere with the young seedling, and the young seedling can be prevented from being damaged by the supporting frame.

According to the sixth aspect of the present invention, since the crawler belt width of the traveling section is set to be equal to or less than half between the plants of the young seedlings vegetated in the paddy field, when the traveling section moves between the plants of the young seedlings. In addition, it is possible to prevent problems such as the young seedling falling down due to the crawler belt of the running section or mud extruded to the side as the crawler track sinks.

[Brief description of the drawings]

FIG. 1 is a side view of a medicine sprayer according to the present invention.

FIG. 2 is a plan view of the medicine spraying vehicle.

FIG. 3 is an explanatory front view showing a working state of the medicine spraying vehicle.

FIG. 4 is an explanatory diagram of power transmission.

FIG. 5 is a side view of a mission unit.

FIG. 6 is an explanatory sectional plan view of a rear transmission case.

FIG. 7 is an explanatory sectional side view of a front transmission case.

FIG. 8 is an explanatory cross-sectional side view of the operation unit.

FIG. 9 is an explanatory plan view of the operation unit.

FIG. 10 is a front view of the medicine spraying device.

[Explanation of symbols]

 A Crawler type work vehicle 1 Running unit 2 Body frame 3 Engine unit 4 Transmission unit 5 Operating unit 6 Hydraulic oil tank 7 Fuel tank

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsuhiro Kuroda 428 Enami, Onami, Okayama Pref.Seirei Industry Co., Ltd. Inventor Masahiro Hanafusa 428 Enami, Okayama City, Okayama Pref.

Claims (6)

[Claims] 1. A medicine dispersing vehicle comprising a medicine tank (8) and a medicine dispersing device (9) communicatively connected to the medicine tank (8), comprising a pair of left and right crawler-type traveling parts (1L, 1R) between the vehicle body frame (2) and
(5) is installed, and the engine unit (3) is located behind the operation unit (5).
The above-mentioned medicine tank is located at the rear of the motor unit (3).
(8) A medicine dispersing vehicle characterized in that a medicine dispersing device (9) is arranged in front of a vehicle body frame (2). 2. A driver's seat (145) is provided in the driver's part (5), and the driver's seat (145) operates so that a pair of right and left traveling parts (1L, 1R) move in opposite directions. 2. The medicine dispersing vehicle according to claim 1, wherein the medicine dispersing vehicle is arranged near a turning center line (C) of a spin turn for turning the vehicle body. 3. A pair of left and right running parts (1L, 1R) are provided with driven wheels (12L, 12R, 13L, 13R) at front and rear ends of a running frame (2) extending in the front-rear direction, respectively.
A pair of left and right drive wheels (11L, 11R) are linked and connected to a transmission section (4), which is arranged substantially at the center of (2), and each drive wheel (11L, 11R) is connected.
R) and front and rear driven wheels (12L, 12R, 13L, 13R)
(14L, 14R) is wound.
The drug sprayer described. 4. The traveling frame (10L, 10R) of the traveling portion (1L, 1R).
R), a pair of supporting frames (17L, 17R, 18L, 18R) are raised upward, and each supporting frame (17L, 17R, 18L, 1
8R) is bent inward from the middle of each support frame.
(17L, 17R, 18L, 18R) is connected to the body frame (2) at the tip of the drive wheel (11L), (11R) between the pair of front and rear support frames (17L, 18L), (17R, 18R). The medicine spraying vehicle according to claim 3, wherein a vehicle is disposed. 5. A pair of front and rear support frames (17L, 17R, 18L, 1).
8R) is the ground clearance (H2) of the portion located within the track width (W2, W2).
However, at least the height of the seedlings (N) vegetated in the paddy (G)
The medicine spraying vehicle according to claim 4, wherein the setting is made higher than 1). 6. The track width (W2) of the running part (1L, 1R) is a paddy field.
The chemical sprayer according to claim 3, wherein the number of the seedlings (N) vegetated in (G) is less than half of that between the plants (W1).