JP6717263B2 - Fertilizer application and work vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fertilizer application device for applying fertilizer to a field, and a work vehicle such as a seedling transplanter equipped with the fertilizer application device.

Work vehicles such as seedling transplanters and tractors that perform work such as planting seedlings in the field are equipped with a fertilizer application device that sprays fertilizer into the field, and an outlet is provided to discharge fertilizer from the fertilizer application after the field work is completed. There are known ones (see Patent Documents 1 and 2). According to the technique described in Patent Document 1, when the fertilizer in the fertilizer application is discharged after the work in the field is completed, the fertilizer can be discharged by opening the discharge port (58) and manually turning the feeding part. .. In the technique described in Patent Document 2, it is possible to open the discharge port shutter (84) and discharge the fertilizer from the fertilizer recovery pipe (85).

JP, 2006-325418, A JP, 2004-81099, A

However, in the technique described in Patent Document 1, when the discharge port is opened, fertilizer may spill and adhere to the machine body, causing rust. For this reason, there is a possibility that the detachable parts become unremovable due to rust or the like due to deterioration and wear of the machine body.
Further, in the configuration described in Patent Document 2, since the fertilizer recovery pipe (85) and the like are provided, there is a problem that the weight of the entire fertilizer application apparatus increases. It is necessary to ensure the strength of the frame that supports the fertilizer application, which is a heavy load. However, especially in a small working machine, the fertilizer application may be an optional item that is installed according to the user's request, and the strength of the frame supporting the heavy fertilizer application may not be sufficiently considered. is there. Therefore, when the fertilizer application device is installed, the machine body may be distorted, twisted, or the like, or the strength and rigidity of the entire body may be reduced.

Then, the subject of this invention is reducing the bad influence at the time of discharge|emission of a residual fertilizer.
A second object of the present invention is to secure the strength of the airframe.

The above-mentioned problems of the present invention can be solved by the following means.
That is, the invention according to claim 1 is provided in the storage part (67) for storing the fertilizer, the feeding part (61) for feeding the fertilizer in the storage part (67), and the storage part (67), and of fertilizer can be discharged a discharge port and (83), wherein an openable lid member outlet (83) (85, 85 '), the bag-like fertilizer swelled lower than a top inside The lid member (85, 85 ′) having the accommodation space (85 a, 85 b) formed therein, and the first hooking portion (83 a) provided so as to project upward from the upper portion of the edge of the discharge port (83 ). A second hook portion (83b) which is provided so as to project downward from the lower portion of the edge of the discharge port (83) and has a larger projection amount than the first hook portion (83a), When the lid member (85, 85') closes the discharge port (83), the hook portion (85, 85') is caught by the lid member (85, 85') and holds the lid member (85, 85'). 83a, 83b), a knob (86) provided on the outer surface and upper part of the lid member (85, 85'), and a discharge shutter (84) for opening and closing the discharge port (83). The discharge shutter (84) having a lever (84c) and an interlocking portion (87) provided on the lid member (85, 85'), which is provided with the discharge port (83) and the discharge shutter (84). In a state where the lid member (85, 85′) is mounted so as to be closed, the lid member (85, 85′) is arranged close to the ejection lever (84c), and the lid member (85, 85′) is disposed in the ejection port (83). The fertilizer application device further comprises: the interlocking portion (87) that pushes the discharge lever (84c) to move the discharge shutter (84) to the open state when the discharge shutter (84) is removed .

According to a second aspect of the present invention, the lid member (85, 85') is formed at a bottom portion of the lid member (85, 85') and is depressed downward in a state where the lid member (85, 85') closes the discharge port (83). The fertilizer application apparatus according to claim 1, further comprising: the lid member (85, 85') having a space (85b) .

The invention according to claim 3 comprises a traveling vehicle body (1) for traveling in a field, and the fertilizer application device (4) according to claim 1 or 2 for applying fertilizer to the field. It is a vehicle.

According to the first aspect of the invention, the lid member (85, 85') that closes the discharge port (83) is provided with a bag-like fertilizer storage space (85a, 85b) in which the lower portion swells more than the upper portion. Therefore, it is possible to reduce the adverse effect at the time of discharging the residual fertilizer by reducing the fall of the fertilizer when the discharge port (83) is opened. It is also possible to omit the fertilizer discharge pipe, and it is possible to reduce the weight of the fertilizer application device (4).

Further , according to the invention of claim 1 , since the second hooking portion (83b) is longer than the first hooking portion (83a), when opening the lid member (85, 85'), The sides open first, reducing spillage of fertilizer on the lid members (85, 85').
Further, according to the invention described in claim 1, since the knob portion (86) is provided on the upper portion, the operator grasps the knob portion (86) and pulls it backward, whereby the lid member (85, 85). ′) is apt to come off the upper end due to the force of rotation about the lower end. Therefore, the developer spillage is reduced.
Further, according to the invention of claim 1, when the lid member (85, 85') is removed, the interlocking portion (87) pushes the discharge lever (84c) to move the lid member (85, 85'). The discharge shutter (84) can be opened together. Therefore, the labor of the worker is reduced, and the discharging work is facilitated.

According to the second aspect of the invention, since the fertilizer is easily stored in the hollow space (85b), it is possible to prevent the fertilizer from spilling even if the operator accidentally tilts the lid member (85, 85') downward. You can
According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, it is possible to secure the strength of the machine body of the work vehicle along with the weight reduction of the fertilizer application device.

It is a side view of the riding type rice transplanter with a fertilizer application apparatus of the embodiment of the present invention. It is a top view of the riding type rice transplanter with a fertilizer application apparatus of FIG. It is a principal part explanatory view of the fertilizer application apparatus of Example 1. 4A and 4B are explanatory diagrams of the attachment and detachment of the lid member according to the first embodiment, FIG. 4A is an explanatory diagram of a state in which the lid member is attached, and FIG. 4B is an explanatory diagram of the lid member being removed. It is explanatory drawing of the other form of the lid member of an Example. It is explanatory drawing of the frame of the rice transplanter of an Example. It is an explanatory view of an auxiliary grip of an example, Drawing 7A is an explanatory view of an attachment structure of an auxiliary grip of an example, Drawing 7B is an explanatory view of a marker attachment member, and Drawing 7C is an explanatory view of a state where a drawing marker is attached. Is. FIG. 3 is an explanatory diagram of an attachment portion of the engine cover of the first embodiment. 3 is an explanatory diagram (functional block diagram) of a control unit of the rice transplanter according to the first embodiment. FIG. It is an explanatory view of a support structure of a soil leveling device of an example, Drawing 10A is a side view and Drawing 10B is an explanatory view of a locus at the time of going up and down. It is explanatory drawing of the ridge clutch lever of other forms of an Example.

A four-row planting riding type rice transplanter, which is an embodiment of the seedling transplanter of the present invention, will be described in detail with reference to the drawings.
As shown in the side view of FIG. 1 and the plan view of FIG. 2, a riding-type rice transplanter, which is an example of a working vehicle, is a type of working device that includes a traveling vehicle 1 that is an example of a traveling vehicle body and a lifting link device 2. The seedling planting device 3 is attached and the fertilizer application device 4 is provided, and the whole is configured to function as a riding fertilizer application planter. The traveling vehicle 1 is a four-wheel drive vehicle that has a pair of left and right front wheels 6, 6 and rear wheels 7, 7 that are drive wheels.
In this specification, the left and right sides are referred to as the left side and the right side, respectively, in the forward direction of the rice transplanter, the forward direction is referred to as the front side, and the backward direction is referred to as the rear side.

As shown in FIG. 1, a mission case 11 and an engine 12 are arranged on the main frames 10 a and 10 b, and a hydraulic pump 13 is integrally assembled with the case 11 on the rear side surface of the mission case 11. A steering post 14 is projectingly provided above the front part.
A steering handle 16 is provided on the upper end of the steering post 14. A step floor 19 serving as a floor for operation is attached to the upper part of the machine body, and a cockpit 20 is installed above the engine 12. A shift operation lever (running operation member, HST lever) 17 is provided on the left side of the steering handle 16, and an auxiliary shift lever 26 is provided on the right side.

An operation panel (not shown) is provided on the steering post 14 in front of the cockpit 20.
A ridge clutch lever 18 is provided on the right side of the cockpit 20. The front wheels 6 and 6 are pivotally supported by front wheel support cases 22 and 22 which are provided on the side of the mission case 11 so as to be able to change their directions. Further, the rear wheels 7, 7 are pivotally supported by the rear wheel transmission cases 24, 24 attached to the left and right ends of the left and right frame 37 via a rear wheel support 30.

As shown in FIG. 1 and FIG. 2 as a part of the power transmission mechanism to the rear wheel 7, the rotational power of the engine 12 sequentially passes through the pulley 27, the belt 28 and the pulley 29, and then the hydraulic continuously variable transmission (HST). ) 31 to the input shaft 32a, and from the HST 31 output shaft 32b to the inside of the mission case 11.
Rear end portions of the rear output shafts 11a and 11b project rearward of the mission case 11, and the left and right rear wheel transmission shafts 35 and 35 that are transmitted to the rear wheel transmission cases 24 and 24 are connected to the projecting end portions. The left and right rear wheel transmission shafts 35, 35 drive and rotate the left and right rear wheels 7, 7, respectively.

The seedling planting device 3 is mounted on the traveling vehicle 1 so as to be able to move up and down by the lifting link device 2.
The upper end of the piston of a general lift cylinder 36 (FIG. 1) whose base is rotatably provided on the traveling vehicle 1 is connected to the lifting link device 2, and the hydraulic pump 13 provided on the traveling vehicle 1 lifts the valve. Pressure oil is supplied to and discharged from the lift cylinder 36 via (not shown) to extend and retract the piston of the lift cylinder 36 to vertically move the seedling planting device 3 connected to the lifting link device 2. Is configured to.

The seedling planting device 3 includes a planting transmission case 38 that doubles as a frame that is mounted on the rear part of the elevating link device 2 via the left and right frames 37 in a rolling manner, and a supporting member provided in the planting transmission case 38. Seedling mounts (seedling tanks) 39 that are supported and reciprocate in the left-right direction of the machine body, and seedlings that are attached to the rear end of the planting transmission case 38 and plant one seedling from the lower end of the seedling mount 39 in the field. A planting tool 41, a center float (sensor float) 42, a side float 43, etc., which is a ground leveling body in which a rear part is pivotally supported at a lower part of a planting transmission case 38 and a front part thereof is vertically swingably mounted. Is configured. The center float 42 and the side float 43 are provided to level the field and to level the front of the field where seedlings are planted by the seedling planting equipment 41.

The PTO transmission shaft 45 (FIG. 1) has universal joints at both ends, and is provided to transmit the power from the mission case 11 to the planting transmission case 38 of the seedling planting device 3.
The seedling planting device 3 has a four-row planting structure. The planting transmission case 38 also serves as a frame, and the seedlings are reciprocally moved left and right to feed the seedlings one by one to the seedling take-out port 39a (Fig. 2) of each row. The table 39 is provided with a seedling planting tool 41 for planting the seedlings supplied to the seedling take-out port 39a in the field.

As shown in FIG. 1, a rotor 70a as an example of a ground leveling member is arranged in front of the center float 42, and the rotor 70a is in front of a rotor 70b as an example of a ground leveling member in front of the side float 43. It is arranged. The rotor 70a receives power from the gear in the transmission case 24 of the rear wheel 7 via the transmission shaft 25, and the rotor 70b receives power from the drive shafts (not shown) of both rotors 70a and 70a. Power is transmitted from a pair of chains (not shown) in the pair of chain cases 71, 71.

The fertilizer application device 4 feeds the fertilizer in the fertilizer tank 67, which is an example of a storage unit, downward by a fixed amount by the fertilizer feeding unit 61 (FIG. 3 ), and the fed fertilizer is fed by the blower 69 through the fertilizing hose 62 to the fertilizer guide 80. The fertilizer guide 80 is transferred to the fertilizer guide 80, and is dropped into the fertilizer groove formed in the vicinity of the side portion of the seedling planting row by the groove body 82 provided on the front side.
Further, the pedal 86 (FIG. 2) can operate both the main clutch and the left and right rear wheel braking devices (not shown), and is arranged on the lower right side of the steering handle 16. When the pedal 86 is depressed, the main pedal is depressed. The clutch will be disengaged, the rear left and right wheel brakes will be applied, and the aircraft will stop.

A front arm (ridge handle) 88 is supported in front of the machine body. The front arm 88 prevents the front end of the traveling vehicle body 1 from rising too much when the traveling vehicle body 1 crosses a step such as a ridge by an operator gripping and operating the front arm 88. It is possible to assist the front end to face upward in the initial stage of crossing. A center mascot 89 is removably attached to the front arm 88 from the tip of the front arm 88 so that the front arm 88 and the center mascot 89 can be integrated. It is also possible to provide a lamp 89a at the tip of the center mascot 89 and use the front arm 88 and the center mascot 89 as one lever. Further, side markers 44 are provided on both front sides of the step floor 19.

An engine operation/stop switch 90 is installed on the front portion of the upper surface of the steering post 14. The engine operation/stop switch 90 of the embodiment is composed of a switch that switches between "drive" and "stop" each time the operator pushes it. In addition, the engine 12 is started by pulling a recoil knob (not shown) of the traveling vehicle 1 by setting the engine run/stop switch 90 to “run”, and by setting the engine run/stop switch 90 to “stop”. 12 is stopped (emergency stop).
When the traveling vehicle 1 crosses the ridges in the field, the traveling vehicle 1 is raised forward, and therefore the worker turns around in front of the machine and uses the ridge handle 88. When trying to stop the traveling vehicle 1 while using the ridge handle 88, the engine operation/stop switch 90 is arranged on the upper surface of the steering post 14 so that the operator can start the engine operation/stop switch 90 from the front of the machine body. Can be operated and the traveling vehicle 1 can be stopped. In the conventional configuration, the rush handle 88 is provided with a switch dedicated to an emergency stop, and has a switch dedicated to an emergency stop and a main switch on the operation panel, which increases the number of parts and reduces the cost. There was also a risk of rising, and the switch for the emergency stop might react incorrectly with flying stones. On the other hand, in the riding type rice transplanter of the embodiment, the engine 12 can be operated and stopped by the single engine operation/stop switch 90 arranged on the front side of the upper surface, the number of parts can be reduced, and erroneous reaction can be prevented. Fear is also reduced.

The rear wheel transmission case 24 is attached to the left and right ends of the left and right frames 37 and is pivotally supported by the rear wheel support 30.
The rotation of the rear wheel transmission case 24 causes the axle 23 of the rear wheel 7 to move up and down together with the rear wheel transmission case 24. Power is transmitted to the rear wheel transmission case 24 from the transmission case 11 via the left and right rear wheel transmission shafts 35.

FIG. 3 is an explanatory view of a main part of the fertilizer application apparatus according to the first embodiment.
In FIG. 3, the fertilizer application device 4 of the riding type rice transplanter of the embodiment is fixedly supported by the fertilizer application frame. The fertilizer application device 4 has a granular material hopper (fertilizer tank) 67 capable of accommodating granular material such as fertilizer as an example of a storage unit at the upper part.
The powder hopper 67 is provided for each line, and an openable/closable lid 67a is attached to the upper part. The lower part of the powder hopper 67 is branched into a number of fertilization lines to form a funnel shape, and the lower part is connected to the upper ends of the feeding parts 61,....
At the lower end of the powder hopper 67, a fertilizer outlet 67b is formed as an example of an outlet through which the powder stored in the powder hopper 67 flows out.

The feeding unit 61 has, as an example of a feeding member, two feeding rolls 73A and 73B that feed the fertilizer in the powder hopper 67 downward. The two delivery rolls 73A and 73B are arranged side by side in the axial direction of the delivery shaft 75. Each of the feeding rolls 73A and 73B is a rotating body in which groove-shaped recesses 74,... Are formed on the outer peripheral portion, and is provided on the angular shaft portion 75a (a square shaft in the illustrated example) of a common feeding shaft 75 provided in the left-right direction. It is fitted so as to rotate together.
As the feeding rolls 73A and 73B rotate, the fertilizer dropped and supplied from the powder hopper 67 is accommodated in the recess 74 and fed downward. The fertilizer fed by both feeding rolls 73A and 73B is discharged from the feeding port 61a at the lower end.

The number of the concave portions 74 of the feeding rolls 73A and 73B in the illustrated example is 6, and the phases of the concave portions 74 of both are different. Therefore, the concave portions of the feeding rolls 73A and 73B alternately feed the fertilizer, and the amounts of the fertilizer discharged from the feeding outlet 61a are equalized in time. It is also possible to make the phases of the recesses 74 of both feeding rolls 73A and 73B equal by removing any one of the feeding rolls 73A or 73B from the feeding shaft 75 and reattaching them by appropriately changing the phase. With this, it becomes possible to apply it when the fertilizer is applied to the field in spots.

In addition, a brush 76 that slidably contacts the outer peripheral surface of the feeding roll 73 on the side where the recess 74 moves downward (front side) is detachably provided inside the feeding unit 61. By this brush 76, fertilizer is stored in the recessed portions 74 of the feeding rolls 73A and 73B in a slidable state, and the amount of fed fertilizer by the feeding rolls 73A and 73B is kept constant.

A connection pipe 63 communicating with the front-rear direction is connected to the delivery port 61a of the delivery unit 61. The fertilizer hose 62 is connected to the rear end of the connecting pipe 63. On the other hand, the front ends of the connection pipes 63 of the respective lines are inserted and connected to the back surface of the air chamber 68.
The left end of the air chamber 68 is connected to the blower 69, and the air from the blower 69 is blown into the fertilizer hose 62 (FIG. 1) from the connecting pipe 63 via the air chamber 68.

In FIG. 3, a fertilizer discharge port 83 for taking out the fertilizer in the powder hopper 67 is formed on the back surface of the feeding case 78. The fertilizer discharge port 83 is provided with a discharge shutter 84 which can be opened and closed with the upper end side as a fulcrum. The discharge shutter 84 is rotatably supported by the fixed portion 78a of the feeding case 78 about the rotation shaft 84a. The discharge shutter 84 switches the fertilizer from the granular hopper 67 between a position (see the broken line in FIG. 3) and a position (see the solid line in FIG. 3) at which the fertilizer can be discharged to the fertilizer discharge port 83 side (see the solid line in FIG. 3). Have and. Further, the discharge shutter 84 is provided with a discharge lever 84c for manually moving the shutter body 84b, which is exposed at the rear portion.
The detaching portion 78b on the upper portion of the feeding case 78 is configured to be separable from the fixed portion 78a at the time of maintenance of the feeding rolls 73A and 73B.

4A and 4B are explanatory diagrams of the attachment and detachment of the lid member according to the first embodiment, FIG. 4A is an explanatory diagram of a state in which the lid member is attached, and FIG. 4B is an explanatory diagram of the lid member being removed.
A cap 85, which is an example of a lid member, is detachably attached to the fertilizer discharge port 83 of each feeding unit. The cap 85 has a substantially right-angled triangular shape having a base in a side view and is formed in a substantially triangular column shape extending in the left-right direction. A fertilizer storage space 85a is formed inside the cap 85. Therefore, in the cap 85 of the first embodiment, the accommodation space 85a is formed in a bag shape in which the lower portion is swollen than the upper portion. Therefore, it is possible to increase the amount of developer accommodated in the accommodation space 85a as compared with the case where the accommodation space 85a is configured to have a bulged upper side. The shape of the cap 85 is not limited to the triangular prism shape, but may be any shape such as a polygonal prism shape such as a quadrangular prism shape or a pentagonal prism shape, a cylindrical shape, or the like in which the accommodation space 85a is formed. Further, the cap 85 of the embodiment is preferably made of an elastically deformable material such as rubber or soft resin.

Therefore, by removing the cap 85 from the fertilizer discharge port 83, the fertilizer remaining in the granular hopper 67 can be discharged from the fertilizer discharge port 83. The discharged fertilizer can be collected in the fertilizer bag arranged outside the fertilizer discharge port 83.
The cap 85 of the embodiment does not have a plate-like structure in which the fertilizer discharge port 83 is simply closed, but has a storage space 85a in which fertilizer can be stored. Therefore, when fertilizer enters the fertilizer discharge port 83 due to vibration or the like during planting work or fertilizer work, it is stored inside the cap 85, and the cap 85 receives the fertilizer when the cap 85 is removed. You can In the case of a plate-like structure that simply closes the fertilizer discharge port 83, there is a problem that the fertilizer that has entered the fertilizer discharge port 83 spills and adheres to the machine body when the fertilizer discharge port 83 is opened, causing the machine body to rust. However, in the cap 85 of the embodiment, this is reduced.

Further, in the configuration of the embodiment, members such as the fertilizer recovery pipe as in the configuration described in Patent Document 2 are not provided, and the weight of the entire fertilizer application device 4 is reduced and the cost is reduced. Therefore, the weight of the fertilizer application device 4 is less likely to adversely affect the frame of the traveling vehicle 1, and an additional configuration or the like for reinforcement is unnecessary. Therefore, the fertilizer application apparatus 4 of the embodiment can be applied to a small-sized and low-cost rice transplanter in which the strength and rigidity of the frame are not so high.

In FIG. 3 and FIG. 4, the outer end of the fertilizer discharge port 83 is provided with upper and lower flange-shaped hook portions 83a and 83b protruding outward in the vertical direction. In the first embodiment, the length L2 of the lower catching portion 83b as an example of the second catching portion is longer than the length L1 of the upper catching portion 83a as an example of the first catching portion. However, it is formed long. That is, L1<L2 is set.

Therefore, if the cap 85 is pulled rearward from the fertilizer discharge port 83 to remove the cap 85, the cap 85 is easily detached from the upper catching portion 83a having a short length. Therefore, as shown in FIG. 4B, the cap 85 is likely to come off so that the upper side rotates around the lower catching portion 83b. If the lower side of the cap 85 comes off first, the fertilizer accommodated in the accommodation space 85a may spill, but in the embodiment, the upper side of the cap 85 is likely to come off first and is accommodated in the accommodation space 85a. Fertilizer spillage is reduced.

In FIG. 3 and FIG. 4, the cap 85 has a knob 86 protruding rearward, as an example of a knob, on the upper portion of the rear surface. Therefore, the operator grasps the knob 86 and pulls it backward, so that the cap 85 can be removed from the fertilizer discharge port 83. At this time, since the knob 86 of the first embodiment is installed on the upper portion, when the knob 86 is pulled, as shown in FIG. 4, the knob 86 tends to come off from the upper end side of the cap 85 with the lower end of the cap 85 as the center. When the cap 85 is detached from the lower end side, the developer contained in the cap 85 is easily spilled, but in the embodiment, the developer is spilled from the upper end side of the cap 85, so that the developer spillage is reduced.

In FIGS. 3 and 4, the cap 85 of the embodiment is integrally formed with a hook 87 extending from the upper portion to the front as an example of the interlocking portion. In FIG. 4A, when the cap 85 is attached to the fertilizer discharge port 83, the tip of the hook 87 is arranged below and close to the discharge lever 84c. In FIGS. 4A and 4B, when the cap 85 is removed from the fertilizer discharge port 83, the hook 87 pushes the discharge lever 84c to move the discharge shutter 84 to the open state. Therefore, the operator can open the discharge shutter 84 in conjunction with it by simply removing the cap 85. Therefore, the time and effort required to discharge the fertilizer from the fertilizer discharge port 83 are reduced, and the discharge work is facilitated.

The cap 85 of the first embodiment is preferably made of a transparent material or a semitransparent material. By configuring the cap 85 with a transparent material or the like, an operator can confirm from the outside how much fertilizer is stored in the storage space 85a of the cap 85. Therefore, when the cap 85 is removed, more fertilizer is accumulated than expected by the operator, and overflow of fertilizer is easily reduced. The entire cap 85 can be made of a transparent material or the like, but is not limited to this. For example, it is possible to adopt a configuration in which a transparent window through which the inside can be seen is formed in a part of the cap 85 so that the inside can be confirmed.

FIG. 5: is explanatory drawing of the other form of the lid member of an Example.
In FIG. 5, instead of the form of the cap 85 shown in FIGS. 3 and 4, it is possible to form a cap 85′ having a space 85b recessed downward in the lower part of the accommodation space 85a.
In the cap 85 shown in FIG. 3 and FIG. 4, when the cap 85 is completely removed from the fertilizer discharge port 83, if the worker accidentally tilts the fertilizer discharge port 83 side of the cap 85 downward, the fertilizer in the storage space 85a is removed. It will spill. On the other hand, in the cap 85 ′ of FIG. 5, fertilizer is more likely to be stored in the recessed space 85 b and is less likely to spill as compared with the cap 85.

Further, it is also possible to make the bottom surfaces of the caps 85 and 85 ′ into a net shape so that the fertilizer powder can be dropped. The granular fertilizer accommodated in the granular hopper 67 may rub the fertilizers and generate fertilizer powder during the process of dropping to the feeding unit 61 or when being fed by the feeding rolls 73A and 73B. .. When the powdered fertilizer adheres to the bottom surfaces of the caps 85 and 85′ for a long time, the powdered fertilizer solidifies due to moisture or the like, and the capacity of the caps 85 and 85′ decreases, or the storage space 85a There is also a concern that the fertilizers of No. 85b get wet. On the other hand, by making the bottom surfaces of the caps 85, 85′ mesh-like, even if the powdered fertilizer flows into the storage spaces 85a, 85b, it is quickly discharged to the field, so that the caps 85, 85′ are discharged. Prevents the powdered fertilizer from solidifying. The amount of powdered fertilizer discharged to the field is sufficiently smaller than the normal fertilizer application rate, so there is little concern that it will be excessively applied.

FIG. 6 is an explanatory diagram of the frame of the rice transplanter of the embodiment.
In FIG. 6, the riding type rice transplanter of the embodiment has a pair of left and right vertical frames 101 extending in the front-rear direction. The vertical frame 101 according to the first exemplary embodiment is composed of a rectangular tubular member. The vertical frame 101 also has a front portion 101a extending in the front-rear direction, a middle portion 101b inclined rearward and obliquely upward from the rear end of the front portion 101a, and a rear portion 101c extending rearward from the rear end of the middle portion 101b.
The step floor 19 is supported on the upper surface of the front portion 101 a of the vertical frame 101.

A front frame 102 that connects the vertical frames 101 to each other is fixedly supported on a front portion 101a of the vertical frame 101. A rear frame 103 that connects the vertical frames 101 is fixedly supported at the rear end of the rear portion 101c of the vertical frame 101. The fertilizer application device 4 is fixedly supported by the rear frame 103. On the inner side of the rear frame 103 in the left-right direction, a pair of right and left rectangular-tube-shaped working machine support frames 104 extending downward are supported. A working machine such as the seedling planting device 3 can be supported on the working machine support frame 104. A rear case support frame 105 extending in the left-right direction is fixedly supported at the lower end of the work machine support frame 104. A rear drive case (rear wheel transmission cases 24, 24) is supported by the rear case support frame 105.

On the inner side of the rear case support frame 105 in the left-right direction, a pair of right and left rectangular tubular lower frames 106 that extend forward are fixedly supported. A flange member 107 is supported on the front end of the lower frame 106.
A reinforcing member 108 extending downward is fixedly supported at the front end of each vertical frame 101. When viewed from above, the reinforcing member 108 is formed to have a cross-sectional shape (a U-shape) with the inside in the left-right direction being open. The mission case 11 is supported by the flange member 107 and the reinforcing member 108.

Further, a seedling frame support frame 109 extending outward in the left-right direction is fixedly supported at the front end of each vertical frame 101. The seedling frame support frame 109 of the embodiment is composed of a cylindrical pipe. The auxiliary seedling frame 303a of the auxiliary seedling frame 303 is fixedly supported by the seedling frame fixing portion 109a at the outer end of the seedling frame support frame 109. In the embodiment, the outer diameter of the auxiliary seedling frame 303a is made larger than the inner diameter of the seedling frame supporting frame 109, and the outer diameter of the tip (lower end) of the auxiliary seedling frame 303a is set to the inner diameter of the seedling supporting frame 109. A structure (so-called spigot structure) that is cut and fitted according to is adopted. Therefore, the rigidity in the twisting direction is secured.
The main frames 101 to 109 of the riding type rice transplanter according to the embodiment are configured by the members denoted by the reference numerals 101 to 109.

A pair of left and right auxiliary frames 111 is supported by the main frames 101 to 109. The auxiliary frame 111 includes an auxiliary main body portion 111a that is an example of an outer portion that extends in the front-rear direction in parallel to the vertical frame 101 outside the vertical frame 101, and an auxiliary connection portion 111b that extends upward from the rear end of the auxiliary main body portion 111a. , An auxiliary upper portion 111c extending inward in the left-right direction from the upper end of the auxiliary connecting portion 111b. The auxiliary frame 111 of the embodiment is formed by bending a round pipe.
The front end of the auxiliary body 111a is fixedly supported by the seedling frame support frame 109 by welding or the like. Further, the auxiliary upper portion 111c is fixedly supported on the vertical frame 101 by welding or the like in the fixed portion 111d. The auxiliary upper part 111c is used as a fertilizer application frame that supports the fertilizer application device 4, and supports the fertilizer application device 4. Further, the rear portion (rear floor) of the step floor 19 is supported on the outer side of the auxiliary upper portion 111c in the left-right direction.

As an example of an auxiliary step frame, an auxiliary step support portion 112 extending downward is supported by each auxiliary body 111a. The auxiliary step support portion 112 is inclined and supported outward in the left-right direction as it goes downward. That is, when viewed from the front of the traveling vehicle 1, the pair of left and right auxiliary step support portions 112 are arranged in a V shape.
The auxiliary step support portion 112 is formed in a U shape in a side view. The lower end 112a of the auxiliary step support 112 is arranged parallel to the front-rear direction and the horizontal direction. An auxiliary step fixing portion 113 is fixedly supported on the lower end portion 112a by welding or the like on the inner side in the left-right direction. The auxiliary step fixing portion 113 is formed on an L-shaped plate arranged along the horizontal direction. The auxiliary step 114 is supported by the auxiliary step fixing portion 113 with a screw or the like (not shown). The auxiliary step 114 is formed in a plate shape so that an operator can put his/her foot on/off the traveling vehicle 1. On the upper surface of the auxiliary step 114, unevenness for removing mud is formed, or mud on the shoes is formed in a mesh shape so as not to collect on the auxiliary step 114.

Left and right pipes 116 extending in the left-right direction are fixedly supported by welding or the like between the auxiliary step fixing portions 113. The left and right pipes 116 connect the left and right auxiliary frames 111 via the left and right auxiliary step fixing portions 113. The left and right pipes 116 are fixed to the lower frame 106 by welding or the like.
An auxiliary grip fixing portion 117 is supported on the rear portion 112b of the auxiliary step support portion 112. The auxiliary grip fixing portion 118 is also supported by the auxiliary connecting portion 111b of the auxiliary frame 111.

7A and 7B are explanatory views of the auxiliary grip of the embodiment, FIG. 7A is an explanatory view of an auxiliary grip attachment structure, FIG. 7B is an explanatory view of a marker attachment member, and FIG. 7C is an explanatory view of a state in which a drawing marker is attached. Is.
In FIG. 7, each of the auxiliary grip fixing portions 117 and 118 is configured by an L-shaped member in a side view, and has improved rigidity as compared with the case of being configured by a plate-shaped member. A fixing hole 117a is formed in the auxiliary grip fixing portion 117 on the front side. Further, the auxiliary grip fixing portion 118 on the rear side is formed with a lower fixing hole 118a and an upper boss 118b protruding forward.

Auxiliary grips 119 that can be gripped by an operator when getting on and off are supported by the auxiliary grip fixing portions 117 and 118. The auxiliary grip 119 of the embodiment has a configuration in which a round pipe is bent in an inverted J shape. The front lower end and the rear lower end of the auxiliary grip 119 are formed in a shape in which a round pipe is flattened. The crushed direction is crushed so that the flat surfaces are the front surface and the rear surface. A front through hole 119a is formed at the lower end on the front side of the auxiliary grip 119. A pair of upper and lower rear through holes 119b and 119c are formed at the lower rear end of the auxiliary grip 119. Therefore, the front side of the auxiliary grip 119 is fixed by a fastening member such as a bolt penetrating the front through hole 119a and the fixing hole 117a. The rear side of the auxiliary grip 119 is a fastening member such as a bolt through which the boss 118b penetrates the upper rear through hole 119c and also penetrates the lower rear through hole 119b and the lower fixed item 118a, and is used as a rotation stopper. It will be fixed in the fixed state.

In FIG. 7, a marker mounting member 120 is supported by the auxiliary grip 119. The marker attachment member 120 has hook hooks 120a arranged in a pair in the front and rear on the upper portion of the auxiliary grip 119, and a detachable clamp 120b supported on the lower front side of the auxiliary grip 119. The hook 120a can hook and hold the inner circumference side of the ring-shaped main body 131a of the wire drawing marker (rotary marker) 131. Further, the detachable clamp 120b can be fixed by sandwiching the wire frame 131b of the wire drawing marker 131.

When the traveling marker 1 is housed in a barn or when the ridge is high (high ridge), the line drawing marker 131 may contact the wall surface or the like and be damaged if it protrudes in the lateral direction of the machine body. If the wire drawing marker 131 is removed and temporarily placed on the step floor 19, there is a risk that the wire drawing marker 131 may fall due to inclination or vibration, or an operator may accidentally step on it and damage it. In the embodiment, as shown in FIG. 7C, the auxiliary grip 119 can be attached and stored on the outside of the machine body, and it does not project in the machine body working direction and is less likely to be damaged by contact with a wall surface or the like. Further, since it is held by the hook 120a and the detachable clamp 120b, it is prevented from falling even if there is inclination or vibration, and the operator is prevented from accidentally stepping.

Further, as shown in FIG. 7B, the detachable clamp 120b of the embodiment supports the portion of the wire frame 131b that is bent in an L shape, and the wire frame 131b is supported in a state of facing the center of the machine body. Therefore, the marker attachment member 120 of the embodiment can be supported so that the wire frame 131b and the main body 131a of the wire drawing marker 131 do not project outward in the width direction of the traveling vehicle 1. Therefore, damage due to contact with a wall surface or the like can be reduced, and it can be compactly stored when stored in a barn or the like.

FIG. 8 is an explanatory diagram of a mounting portion of the engine cover according to the first embodiment.
6 and 8, an engine cover fixing member 121 is fixedly supported inside the auxiliary upper part 111c of the auxiliary frame 111 in the left-right direction. The engine cover fixing member 121 is formed in a substantially V shape in a side view, and has higher rigidity than that of a flat plate configuration. An insertion hole 121a is formed on the upper surface of the engine cover fixing member 121. A boss portion 122a at the rear end of the openable/closable engine cover 122 can be inserted into the insertion hole 121a. Therefore, when the boss portion 122a is inserted into the insertion hole 121a, the engine cover 122 is supported by the main frames 101 to 109 via the auxiliary frame 111.

A tank stay 123 is supported inside the engine cover fixing member 121 at the inner end of the auxiliary upper portion 111c. The tank stay 123 is formed in a plate shape, is fixed to the auxiliary frame 111 by welding or the like, and is also fixed to the engine cover fixing member 121 by welding or the like. Therefore, the tank stay 123 is reinforced as compared with the case where the tank stay 123 is fixed at one place, and also the engine cover fixing member 121 is reinforced. A front tank support member 124 extending upward is supported by the flange member 107. The fuel tank 125 of the first embodiment is fixed to the front tank support member 124 and three left and right tank stays 123.

In the frame structure of the riding type rice transplanter of the embodiment, the vertical frame 101 and the auxiliary main body 111a of the auxiliary frame 111 have the same height in the gravity direction. Therefore, the lower surface of the step floor 19 can be supported by the vertical frame 101 and the auxiliary frame 111, and it is easy to secure rigidity. In particular, in a conventional large rice transplanter, each member of the main frame is thick and strong, but if the size is reduced as it is, the pipe becomes thin and the strength becomes insufficient. On the other hand, by providing the auxiliary frame 111 as in the embodiment, the insufficient strength can be solved. Therefore, it is possible to sufficiently secure the strength for mounting the fertilizer application device 4. Further, the lowermost surface of the step floor 19 can be positioned by the vertical frame 101 and the auxiliary frame 111, and the step floor 19 can be easily supported.

Further, in the riding type rice transplanter of the embodiment, since the auxiliary step 114 is arranged on the side of the step floor 19, it is easy for the worker to get on and off. In particular, the auxiliary step support portion 112 is arranged in a V shape when viewed from the front, the auxiliary step 114 is arranged outside the step floor 19, and the auxiliary step 114 corresponds to the step floor 19. It is easier to get on and off than when the vehicle is hidden below.
Further, the auxiliary step support portion 112 is supported at the middle portion of the auxiliary main body portion 111a in the front-rear direction. Therefore, the auxiliary step support 112 can be U-shaped, and the front or rear side length does not become uneven. Therefore, the auxiliary step support portion 112 can have the same shape on the left and right sides, and the configuration can be simplified.

In addition, the auxiliary frame 111 of the embodiment is connected to the left and right by the left and right pipes 116, so that the strength and rigidity of the whole can be improved as compared with the configuration in which the left and right pipes 116 are not provided. Therefore, it is possible to reduce the distortion or deformation of the frame when the weight is applied to the auxiliary step 114. In particular, the left and right pipes 116 are fixed to the lower frame 106, and the strength is further improved as compared with the case where they are not fixed.
Further, the auxiliary step 114 of the embodiment is supported by the plate-shaped auxiliary step fixing portion 113. Conventionally, even if the auxiliary step is provided, the auxiliary step fixing portion is not provided, and the auxiliary step is supported on one pipe (the lower portion 112a of the auxiliary step supporting portion 112). The structure was such that the support was unstable and the strength was difficult to obtain. On the other hand, in the embodiment, the plate-shaped auxiliary step fixing portion 113 and the lower portion 112a of the auxiliary step supporting portion 112 can support the same, and the strength and the like can be secured.

Further, in the riding type rice transplanter of the embodiment, the seedling frame support frame 109 and the auxiliary frame 111 are fixed. Therefore, the strength and rigidity of the seedling frame support frame 109 and the strength and rigidity of the auxiliary frame 111 are improved, and the reinforcing portion 108 is fixed near the seedling frame support frame 109. Therefore, the strength and rigidity of the seedling frame support frame 109 are further improved and reinforced.
In the conventional configuration, when the rigidity of the seedling frame supporting frame is not sufficient, the auxiliary seedling frame frame 303a is extended upward after passing through the step floor 19 (passing between the main floor and the side floor). Was there. Therefore, when carrying out maintenance by removing the step floor 19, there is a problem that the auxiliary floor frame 303a interferes with the removal of the step floor 19. On the other hand, in the embodiment, since it is possible to sufficiently secure the rigidity of the seedling frame support frame 109, it is possible to extend the auxiliary seedling frame frame 303a to the outside of the step floor 19 and then extend it upward. is there. Therefore, it is possible to improve the maintainability of the step floor 19.

Further, in the riding type rice transplanter of the embodiment, the auxiliary upper portion 111c of the auxiliary frame 111 is fixed to the vertical frame 101, and the rigidity is improved as compared with the case where it is not fixed. Therefore, the engine cover 122 and the fuel tank 125 can be fixed via the auxiliary frame 111, and in the configuration without the auxiliary frame 111, a separate member is attached to the vertical frame 101 or the like to fix the engine cover 122 or the like. The support can be performed more easily than the configuration provided.
The rear part of the step floor 19 is supported on the outer side of the auxiliary upper part 111c. Therefore, as compared with the case where the engine cover 122 and the like are supported on the inner side in the left-right direction and the rear portion of the step floor 19 can be fixed on the outer side, and the step floor 19 is removed and maintained, the maintainability is improved. improves.

Further, in the riding type rice transplanter of the embodiment, the auxiliary grip 119 is attached to the side of the step floor 19 so that it is difficult to prevent the step floor 19 from being attached or detached. Further, both ends of the auxiliary grip 119 are supported by the respective parts 111b and 112b fixed to the main frames 101 to 109, and sufficient rigidity can be ensured.
The auxiliary grip 119 is prevented from rotating by the upper boss 118b. Therefore, the auxiliary grip 119 can be prevented from rotating with a simple structure, and assembling can be improved and rattling can be easily reduced as compared with the case where the fastening member such as a screw is used to prevent rotation.

Further, the auxiliary grip 119 of the embodiment has both ends crushed into a flat plate shape, and the crushed flat surfaces are arranged in the front and rear. Therefore, the rigidity of the auxiliary grip 119 is improved as compared with the case where the auxiliary grip 119 is not crushed. Further, when the operator grips the auxiliary grip 119 and gets on and off, the worker gets on and off the vehicle 1 from the left and right direction, and therefore the auxiliary grip 119 is easily subjected to the force in the left and right direction. When the crushed plane is left and right, it is easy to bend at the boundary between the crushed flat plate-shaped portion and the pipe portion, but in the example, the plane is crushed so as to be the front and back, and for the left and right loads. Has improved rigidity.

As described above, in the riding type rice transplanter of the embodiment, the rigidity of the whole is improved by the configuration of the frames 101 to 124. In addition, there is a fertilizer application device that discharges fertilizer by a blower in a higher model, and as described in Patent Document 2, it is also possible to employ the fertilizer application device 4 that has a fertilizer recovery pipe and discharges fertilizer using the blower 69. It is possible.
In addition, in the configuration having the fertilizer recovery pipe and switching between the fertilizer recovery pipe and the air chamber 68 by the discharge lever, the following configuration can be adopted.

FIG. 9 is an explanatory diagram (functional block diagram) of the control unit of the rice transplanter according to the first embodiment.
Incidentally, in the functional block diagram of FIG. 9, the illustration is omitted for the configuration not related to the description of the invention.
In FIG. 9, the control unit C of the riding type rice transplanter of the embodiment has an input/output interface I/O for inputting/outputting signals to/from the outside. The control unit C also has a ROM: read only memory in which programs and information for performing necessary processing are stored. The control unit C also has a random access memory (RAM) for temporarily storing necessary data. Further, the control unit C has a central processing unit (CPU) that performs processing according to a program stored in a ROM or the like. Therefore, the control unit C of the first embodiment is configured by a small information processing device, a so-called microcomputer. Therefore, the control unit C can realize various functions by executing the programs stored in the ROM or the like.

(Signal output element connected to control unit C)
The control section C receives output signals from signal output elements such as the delivery detection sensor SN1, the rear wheel rotation sensors SN2a and SN2b, the discharge lever detection sensor SN3, the hopper remaining amount sensors SN4a to SN4d, and the auxiliary shift sensor SN5. ..
The feeding detection sensor SN1 is supported by the fertilizer application device 4 and detects the rotation of the feeding shaft 75 of the feeding rolls 73A and 73B.

The rear wheel rotation sensors SN2a and SN2b are arranged corresponding to the drive shaft of the rear wheel 7, and detect the rotation of the rear wheel 7. The rear wheel rotation sensors SN2a and SN2b are arranged corresponding to the right rear wheel and the left rear wheel, respectively, and detect the respective rotations.
The discharge lever detection sensor SN3 is supported by the fertilizer application device 4 and detects which of the fertilizer recovery pipe and the air chamber 68 the blower 69 is connected to.
The hopper remaining amount sensors SN4a to SN4d are arranged inside each of the granular material hoppers 67 and detect the remaining amount of fertilizer.
The subtransmission sensor SN5 detects the position where the subtransmission lever 26 is input. The auxiliary transmission lever 26 of the embodiment is configured so that the moving speed (forward), the moving speed (reverse), and the planting speed (forward) can be switched, for example.

(Controlled element connected to control unit C)
The control unit C includes a blower 69 of the fertilizer application device 4, a motor M1 that moves the throttle of the engine 12 to increase or decrease the engine speed, and an alarm having a buzzer M2 and a lamp M3 provided on the operation panel in front of the cockpit 20. Etc. are connected to other control elements (not shown). The control unit C outputs the control signals to the controlled elements 69, M1 to M3, and the like.

(Function of control unit C)
The control unit C has a function of executing processing according to an input signal from the signal output element and outputting a control signal to each controlled element. That is, the control unit C has the following functions.
The blower rotation speed setting means C1 sets the rotation speed of the blower 69 based on the detection results of the sensors SN1 to SN5. The blower rotation speed setting means C1 of the embodiment sets the rotation speed of the blower 69 to the preset first blower rotation speed α1 during fertilization work (when the auxiliary transmission lever 26 is set to the planting speed). To do. Further, the blower rotation speed setting means C1 of the first embodiment sets the second blower rotation speed α2 (<α1) lower than the first blower rotation speed α1 during the trial feeding. In the embodiment, when the drive of the fertilizer application device 4 is input, the traveling vehicle 1 is stopped based on the detection results of the rear wheel rotation sensors SN2a and SN2b, and the feeding detection sensor SN1 detects rotation, The worker manually rotates the feeding rolls 73A and 73B that are stopped as the traveling vehicle 1 is stopped, and determines that the trial feeding work in which the fertilizer is fed for trial is being performed. The stop of the traveling vehicle 1 can be determined as a stopped state when the detection results of the rear wheel rotation sensors SN2a and SN2b are equal to or lower than a preset rotation speed.

The blower rotation speed setting means C1 of the present embodiment determines that the blower 69 is connected to the fertilizer recovery pipe from the detection result of the discharge lever detection sensor SN3 even during the trial feeding. The rotation speed is set to the third blower rotation speed α3 which is higher than the first blower rotation speed α1. Note that the blower rotation speed setting means C1 of the present embodiment drives the blower when the preset time t1 (time when the powder hopper 67 should be empty) is driven at the third blower rotation speed α3. The rotation speed of 69 is returned to the first blower rotation speed α1.
In addition, the blower rotation speed setting means C1 of the present embodiment turns when the difference between the rotation speeds of the left and right rear wheels 7, 7 is equal to or greater than a preset value from the detection results of the rear wheel rotation sensors SN2a, SN2b. When it is determined that the blower 69 is in the middle, the rotation speed of the blower 69 is set to zero. That is, the blower 69 is stopped.

Further, the blower rotation speed setting means C1 of the present embodiment sets the rotation speed of the blower 69 to zero when the engine 12 is stopped. If the engine 12 is started after being stopped, the rotation speed of the blower 69 is set to the fourth blower rotation speed α4 (<α1). In the case where a means for detecting the idling stop is provided, the blower 69 may be stopped at the time of idling stop and driven at a low speed fourth blower rotation speed α4 after the idling stop is released.
Further, the blower rotation speed setting means C1 of the present embodiment sets the rotation speed of the blower 69 to the low speed fifth blower rotation speed α5 (<α1) when the auxiliary transmission lever 26 is set to the moving speed. Set. The second blower rotation speed α2, the fourth blower rotation speed α4, and the fifth blower rotation speed α5 can be the same value (α2=α4=α5) or different values (α2). ≠α4≠α5) is also possible.

The engine speed setting means C2 sets the speed of the engine 12 based on the detection results of the sensors SN1 to SN5. The engine rotation speed setting means C2 of the embodiment sets the rotation speed of the engine 12 by setting the control amount of the motor M1 that operates the throttle of the engine 12 when the vehicle is stopped. When it is determined from the detection result of the discharge lever detection sensor SN3 that the engine rotation speed is set to the fertilizer recovery pipe, the engine rotation speed setting means C2 sets the rotation speed of the engine 12 larger than the engine rotation speed β1 at the time of idling. The second engine speed β2 is set. When the preset time t1 elapses at the second engine speed β2, the engine speed β1 at idle is restored.

The engine control unit C3 controls the motor M1 based on the rotation speeds β1 and β2 set by the engine rotation speed setting unit C2 to control the rotation speed of the engine 12.
The blower control means C4 controls the rotation speed of the blower 69 according to the rotation speeds α1 to α5 and zero set by the blower rotation speed setting means C1.

When it is determined from the detection result of the discharge lever detection sensor SN3 that it is connected to the fertilizer recovery pipe, the notification control unit C5 drives the blower 69 at the third blower rotation speed α3 for a preset time t1. Even if the hopper remaining amount sensors SN4a to SN4d detect that there is fertilizer, the buzzer M2 and the lamp M3 are operated to notify the operator. When it is determined that the hopper remaining amount sensors SN4a to SN4d are not connected to the fertilizer recovery pipe (for example, when the four sensors SN4a to SN4d are all absent) or a small amount of fertilizer (for example, four sensors). In the case where 1 to 3 of the sensors SN4a to SN4d are absent, it is possible to set the time t1 to be a shorter time and to notify early. In addition, the time t1 is set for each of the four powder hoppers 67, and the time t1a at which the sensor of the powder hopper 67 near the outlet of the fertilizer recovery pipe should be fertilizer-free, and the time distant from the outlet. The time t1d (>t1a) when the sensor of the powder hopper 67 should be fertilizer-free can be set to a different time.

In the above-described embodiment, the rotation speed of the blower 69 is set to the low-speed second blower rotation speed α2 during the trial feeding. When the number of rotations of the blower 69 is constant, when the trial feeding is performed, the air volume of the blower 69 is too strong, and the fertilizer may fly out or blow off. On the other hand, by lowering the rotation speed of the blower 69, it becomes difficult for the fertilizer to come out and the delivery accuracy is improved. Therefore, even when the trial feeding operation is performed in the barn or warehouse, the blower 69 is prevented from blowing dust.
Further, in the above embodiment, the trial feeding is detected from the stop of the traveling vehicle 1 and the rotation of the feeding detection sensor SN1, and it is not necessary to separately provide a switch dedicated to the trial feeding, so that the input system can be simplified.

Further, in the above-described embodiment, when the blower 69 is operated, when the blower 69 is connected to the fertilizer recovery pipe, the rotation of the blower 69 is increased to the third blower rotation speed α3. When the rotation speed of the blower 69 does not change, if the amount of fertilizer discharged is large, or if the fertilizer is moist and heavy, the hose (fertilizer recovery pipe) may be clogged due to insufficient air flow. In the said form, the rotation of the blower 69 is increasing and clogging of fertilizer can be suppressed.
Further, as the rotation speed of the blower 69 increases, the rotation speed of the engine 12 also increases. Therefore, the electric power for driving the blower 69 at high speed can be supplemented by the power generation by the engine 12.

Further, when operating the blower 69, if the fertilizer recovery pipe is connected to the fertilizer recovery pipe and the fertilizer is still present even if the fixed time t1 has elapsed, the fertilizer recovery pipe is likely to be clogged with fertilizer. , Buzzer M2 and the like are notified, and the rotation speed of the engine 12 and the rotation speed of the blower 69 are also returned.
If there is no fertilizer or the amount of fertilizer is small from the beginning, it is possible to determine clogging of fertilizer in a shorter time t1 or to determine clogging of fertilizer according to the distance from the outlet of the fertilizer recovery pipe.

Further, in the above embodiment, the blower 69 is stopped while the work vehicle 1 is turning during fertilization work. When the wind was blown from the blower 69 during turning, the fertilizer powder and the muddy splash were sometimes blown to the assistant on the edge of the ridge. Therefore, by stopping the blower 69 during turning, it is possible to protect the assistant on the edge of the ridge. Further, by stopping the blower 69, it is possible to suppress power consumption during turning.
Further, in the above-described embodiment, the blower 69 is stopped when the engine is stopped, and the blower 69 is rotated at a low speed when the engine is restarted. Since electric power is consumed when the engine 12 is started, the load of electric power by the blower 69 can be reduced by rotating the blower 69 at a low speed.

In addition, in the above-described embodiment, when the auxiliary shift lever 26 is set to the moving speed for traveling on the road or the like, the rotation of the blower 69 becomes low, so the power consumption is reduced as compared with the case where the low speed rotation is not performed. To be done. In addition, the fertilizer discharge pipe may be clogged if the blower 69 is stopped when running on an unpaved road or a ridge, but it may be better to rotate the blower 69 at a low speed to blow air, It is possible to stop the blower 69 while traveling on the road.

10A and 10B are explanatory views of a support structure of the soil leveling apparatus of the embodiment, FIG. 10A is a side view, and FIG. 10B is an explanatory view of a locus during ascent/descent.
In FIG. 10, a leveled ground frame 141 extending upward along the entire surface of the seedling mounting table (seedling tank) 39 is supported at the front of the planted transmission case 38. A protruding portion 142 that extends forward is arranged at the lower portion of the leveling frame 141. A cam 143 extending forward is rotatably supported on the front end of the protrusion 142 about a rotation shaft 143a.

A leveling operation lever 81 is arranged above the leveling frame 141 via a bracket. The ground leveling operation lever 81 can be operated by the operator from the cockpit 20 side. A link 144 extending downward is connected to the leveling operation lever 81. The link 144 is connected to the front end of the cam 143.
A connecting member 146 extending downward is supported at the rear of the planted transmission case 38. A rotor support frame 147, which is an example of a leveling support frame, is supported on the lower end of the connecting member 146. The rotor support frame 147 has a rear portion 147a extending in the front-rear direction and a front portion 147b extending obliquely upward and forward from the front end of the rear portion 147a. The rear end of the rear portion 147a is supported by the lower end of the connecting member 146 so as to be rotatable around a rotation fulcrum 147c. The front upper end portion 147d of the front portion 147b is configured to be able to contact the lower surface of the cam 143. The grounding rotors 70a and 70b are supported by the front portion 147b.

A spring 148 is mounted between the front portion 147b and the upper portion of the leveled ground frame 141. The spring 148 exerts an elastic force to pull up the leveling rotors 70a, 70b and the like so that the front upper end portion 147d of the rotor support frame 147 and the cam 143 are constantly in contact with each other.
Therefore, in the leveling rotors 70a and 70b of the embodiment, when the leveling operation lever 81 is operated, the link 144 moves up and down, and the cam 143 moves the front upper end portion 147d of the rotor support frame 147 in the up and down direction to move the leveling rotor 70a. , 70b can be adjusted in height.

In FIG. 10B, in the conventional configuration, a member corresponding to the connecting member 146 extends upward from the planted transmission case 38, and the rotation fulcrum 01 is arranged above. Therefore, in the conventional configuration, when moving the leveling rotors 70a and 70b up and down, the trajectory 02 centered on the rotation fulcrum 01 has a long moving distance 03 in the front-rear direction. Therefore, it is necessary to secure a space between the seedling planting device 3 and the main body of the traveling vehicle 1, and there is a problem that the length of the riding type rice transplanter in the front-rear direction becomes longer (larger).

On the other hand, in the riding type rice transplanter of the embodiment, the connecting member 146 extends downward from the planted transmission case 38, and the rotation fulcrum 147c is arranged lower than the conventional configuration. In the embodiment, the height of the pivot fulcrum 147c is set inside the ascending/descending range (height direction) 149b of the leveling rotors 70a and 70b, and the pivot fulcrum 147c is set at a height corresponding to the vicinity of the center of the ascending/descending range. It is more preferable to set. Therefore, in the locus 149 when the leveling rotors 70a and 70b move up and down, the moving distance 149a in the front-rear direction becomes shorter than that in the conventional configuration. Therefore, it is possible to downsize the riding rice transplanter.

FIG. 11 is an explanatory view of a ridge clutch lever according to another embodiment of the present invention.
In the riding type rice transplanter of the embodiment shown in FIG. 2, it is arranged on the stepped portion of the step floor 19. However, there is a problem in that the worker's leg gets caught on the step floor 19 during the work, which hinders the work and causes an erroneous operation. On the other hand, as shown in FIG. 11, it is possible to dispose the ridge clutch lever 18 ′ on the front side of the seedling mounting table (seedling tank) 39. The ridge clutch lever 18' is connected to a wire (not shown), and by operating the ridge clutch lever 18' to the left and right, the left and right seedling planting implements 41 can be turned on and off.

Therefore, in the form shown in FIG. 11, by disposing the ridge clutch lever 18 ′ on the front side of the seedling mounting table 39, there is no fear of the operator getting caught on the foot. Further, in the form of FIG. 11, the ridge clutch lever 18 ′ is arranged at a position closer to the left side with respect to the center portion in the width direction. If it is placed in the center portion in the width direction, it will be directly behind the cockpit 20 and it will be difficult to operate from the cockpit 20, but as shown in FIG. 11, it is closer to either the left or right side with respect to the center portion in the width direction. And, the operation can be performed easily, and the workability is secured.

DESCRIPTION OF SYMBOLS 1 Running vehicle 4 Fertilizer application 19 Step floor 61 Feeding section 67 Storage section 83 Discharge port 83a First hooking section 83b Second hooking section 83a, 83b Hooking section 85, 85' Cover member 85a, 85b Storage space 101- 109 main frame 111 auxiliary frame 111a outer part 111c rear part of auxiliary frame 112 auxiliary step frame 114 auxiliary step

Claims (3)

A storage part (67) for storing fertilizer,
A feeding section (61) for feeding the fertilizer from the storage section (67),
A discharge port (83) provided in the storage section (67) and capable of discharging internal fertilizer;
A lid member (85, 85') capable of opening and closing the discharge port (83), the lid having a bag-shaped fertilizer accommodating space (85a, 85b) in which a lower portion is swollen than an upper portion is formed therein. Member (85, 85'),
A first hooking portion (83a) provided so as to project upward from an upper portion of the edge of the discharge port (83), and a first hook portion provided so as to project downward from a lower portion of the edge of the discharge port (83). And a second hooking portion (83b) having a larger protrusion amount than the hooking portion (83a) of the above, and when the lid member (85, 85') closes the discharge port (83), Hooking portions (83a, 83b) hooked on the lid member (85, 85') to hold the lid member (85, 85');
A knob (86) provided on the outer surface and upper part of the lid member (85, 85'),
A discharge shutter (84) for opening and closing the discharge port (83), the discharge shutter (84) having a discharge lever (84c);
An interlocking portion (87) provided on the lid member (85, 85'), the lid member (85, 85') being mounted so as to close the discharge port (83) and the discharge shutter (84). In this state, the discharge lever (84c) is placed close to the discharge lever (84c), and the discharge lever (84c) is pushed when the lid member (85, 85') is removed from the discharge port (83). The interlocking part (87) for moving the discharge shutter (84) to an open state,
A fertilizer application characterized by comprising. The lid member having a space (85b) recessed downwardly, which is formed at the bottom of the lid member (85, 85') in a state where the lid member (85, 85') closes the discharge port (83). (85,85'),
The fertilizer application device according to claim 1, further comprising: A traveling vehicle body (1) traveling in the field,
The fertilizer application device (4) according to claim 1 or 2, which applies fertilizer to the field.
A work vehicle characterized by being equipped with.