JP2014103853A - Fertilizer distributor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fertilizer distributor which has no risk that fertilizer is clogged inside a fertilizer discharge passage and discharge operation is interrupted.SOLUTION: A fertilizer distributer is provided with a fertilizer delivery part 68 for feeding the fertilizer which falls to a lower part of a fertilizer tank 67 that stores fertilizer. A fertilizer application hose 62 which transports the fertilizer toward a farm field is provided thereunder. A conveyance air duct 33 through which fertilizer conveyance air passes and a blower 69 are provided below the fertilizer tank 67. The fertilizer distributer is further provided with a delivery roll 45 that feeds the fertilizer by a fixed quantity to the fertilizer delivery part 68, and a switching shatter 47 that switches a fertilizer blow-off passage 34 provided adjacent to the delivery roll 45, between a fertilizer application duct 34b and a fertilizer discharge duct 34a for discharging the fertilizer to the outside of the machine. The fertilizer distributer is also provided with a flow-down case 46 that houses the fertilizer delivery part 68 and the switching shatter 47. At the time of switching fertilizer feed between the fertilizer application duct 34b and the fertilizer discharge duct 34a, the switching shatter 47 can switch the fertilizer blow-off passage 34 through a cut-off position, where the fertilizer conveyance air is not moved to either the side of the fertilizer application duct 34b or the side of the fertilizer discharge duct 34a.

Description

  The present invention relates to a fertilizer applicator that applies fertilizer to a field when transplanting seedlings.

  As this type of conventional technology, there is known a seedling transplanting machine that includes a fertilizer application device and further connects a seedling planting device to the rear of the tractor.

JP 2008-220250 A

The seedling transplanter described in Patent Document 1 discloses a configuration in which a predetermined amount of fertilizer is discharged from a fertilizer provided at the rear of a traveling vehicle body, and the fertilizer is supplied to seedlings planted in a farm field.
However, the fertilizer application system is configured to use the fertilizer supply passage during fertilization work and the fertilizer discharge passage during fertilizer discharge work by switching with a shutter, and the number of parts is large, and the time and labor required for maintenance work etc. There is a problem that becomes large.

  In addition, when discharging the fertilizer, the fertilizer is discharged from the storage hopper of each article at approximately the same pace, so if the remaining amount of fertilizer is large, a large amount of fertilizer flows into the fertilizer discharge passage at once, and the conveyance generated by the blower There is a problem that the wind cannot transfer the fertilizer, the fertilizer is clogged in the fertilizer discharge passage, the discharge work is interrupted, and the work efficiency is lowered. At this time, it is necessary for the operator to insert a rod or the like into the fertilizer discharge passage to eliminate the clogging, and there is a problem that the labor of the operator increases.

  Then, the subject of this invention is providing the fertilizer which does not have a possibility that a fertilizer may be clogged in a fertilizer discharge channel | path, and discharge | emission operation may be interrupted.

The above problem can be solved by the following solution means.
The invention described in claim 1 includes a fertilizer tank (67) for storing fertilizer, a fertilizer feeding section (68) for feeding fertilizer falling to the lower portion of the fertilizer tank (67), and a lower portion of the fertilizer feeding section (68). A fertilizer supply member (fertilization hose) (62) for transporting fertilizer toward the field, a transport air passage (transport air duct) (33) through which fertilizer transport air moves below the fertilizer tank (67), and the transport In a fertilizer applicator provided with a wind-up device (blower) (69) for supplying conveying air to the wind passage (33), the fertilizer feed section (68) is provided with a feed roll (45) for feeding the fertilizer in a fixed quantity, Switch to switch the fertilizer discharge path (34) to the fertilizer duct (34b) on the fertilizer hose (62) side and the external discharge duct (34a) on the side to discharge the fertilizer out of the machine at the position adjacent to the feeding roll (45). A shutter (47) is provided; A flow-down case (capsule) (46) is provided that houses a feed-out portion (68) and the switching shutter (47), and the switching shutter (47) is a fertilizer for the fertilizer duct (34b) and the discharge duct (34a). When the supply is switched, the fertilizer release path (34) is switched via a blocking position that does not move the conveying air to the fertilizer duct (34b) side or the external discharge duct (34a) side. It is a fertilizer machine.

In the invention according to claim 2, the conveying air passage (33) is disposed outside the fuselage case (46) on the side where the switching shutter (47) is provided, and on the front side of the fuselage case (46). A cross-section fan-shaped switching shutter (47) is provided, and a cross-section circular feeding roll (45) having a plurality of groove-shaped recesses (45a) is provided on the rear side of the machine body of the flow-down case (46). The contact area of the flow-down case (46) that contacts the surface of the fan-shaped section of the cross-section) and the contact area of the flow-down case (46) that contacts the surface of the circular section of the feeding roll (45) are respectively circular arc-shaped. The fertilizer applicator according to claim 1, wherein the fertilizer applicator is formed.

  According to the third aspect of the present invention, a cross-sectional fan-shaped blocking plate (47a) for blocking a part of the conveying air is provided at the lower end of the conveying air in the conveying direction in the sectional fan-shaped switching shutter (47). The fertilizer applicator according to claim 2, wherein the fertilizer applicator is provided.

  According to the fourth aspect of the present invention, there is provided a switching operation member (69) disposed on one side of the right and left sides of the conveying wind passage (duct) (33) and operating a plurality of switching shutters (47) in conjunction with each other. 49) and when the switching operation member (49) is operated to the fertilizer out-of-machine discharge work side, the switching shutter (47) on the side close to the wind-up device (69) opens the outlet of the fertilizer tank (67) widely. In addition, the switching shutter (47) on the side far from the wind generator (69) is characterized in that the opening degree of the fertilizer tank (67) is changed so as to open the outlet of the fertilizer tank (67) narrowly. The fertilizer applicator according to any one of claims 1 to 3.

  For example, when starting the discharge operation of the fertilizer, the discharge amount from the fertilizer tank (67) on the side close to the blower (69) is increased, and the discharge amount is decreased on the far side. The far side may initially have a discharge amount of zero.

  When the fertilizer storage in the fertilizer tank (67) on the side close to the blower (69) decreases, the switching operation member (49) is moved to increase the opening on the side away from the blower (69), and the amount of fertilizer released Increase.

  The invention according to claim 5 detects the amount of fertilizer remaining in the fertilizer tank (67) using a switching operation lever including a switching operation lever or a switching actuator that can be switched in multiple stages as the switching operation member (49). A plurality of remaining amount detection sensors (50) (in the conventional configuration, there is a sensor in the lower part of the fertilizer tank (67) that stops energization when the fertilizer that is in contact is lost and notifies that the fertilizer has run out. (Can also be used) are arranged side by side at locations corresponding to the planting strips of each seedling, and when the number of remaining amount detection sensors (50) of all the strips is less than a predetermined number (1 or 2), all switching The switching actuator is operated until the shutter (47) fully opens the discharge position outside the machine (the remaining amount of fertilizer is small, so even if it is discharged all at once, it will not clog.) All the remaining amount detection sensors (50 Is more than a predetermined number (2 or 3 or more), the opening degree of the switching shutter (47) closer to the wind generator (69) is wide, and the opening degree of the switching shutter (47) on the far side is larger. When the switching actuator is operated so that it becomes narrower and the number of detections of the remaining amount detection sensors (50) of a plurality of strips (1 to 3 strips) close to the wind generator (69) becomes less than a predetermined number (1 or 2), The seedling transplanter according to claim 1, wherein the switching actuator is operated so as to widen the opening of the switching shutter (47) on the side far from the wind device (69).

According to the sixth aspect of the present invention, openings (33a) of the conveying air passage (33) are provided at predetermined intervals inside the conveying air passage (33), and the opening (33a) of the conveying air passage (33) is provided. And a sliding passage (60) having openings (60a) at the same interval as that of the fertilizer discharging portion (60b) at the end thereof is slidably provided inside the conveying air passage (33). When the opening (60a) of (60) and the opening (33a) of the conveying wind passage (33) are combined to form a fertilizer discharge form, the sliding passage (60) is moved outward from the machine body, The fertilizer applicator according to any one of claims 1 to 5, wherein the fertilizer is moved to a position separated from 1).

  According to the first aspect of the present invention, the fertilizer discharge path 34 is switched by the switching shutter 47 so that the transport air passage 33 serves as the transport air transmission path to the fertilizer supply member (fertilization hose) 62 and the fertilizer machine. Since it can be set as the discharge | emission path | route to the outside, it is not necessary to divide the conveyance wind path 33 for fertilizer application and for fertilizer discharge | emission, and becomes a simple structure.

  Further, the switching shutter 47 is configured to switch the fertilizer discharge path 34 via a blocking position where the conveying wind is not moved to either the fertilizer duct 34b side or the off-machine discharge duct 34a side. Since it is possible to prevent the fertilizer from moving unintentionally into the hose 62 and the change in internal pressure, it is possible to prevent the fertilizer from remaining in the fertilizer tank 67 and the fertilizer hose 62, Can be reliably discharged.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the cross-sectional shape of the switching shutter 47 is fan-shaped and the falling case 46 is in contact with the surface of the cross-sectional fan-shaped portion of the switching shutter 47. Since the contact area is an arc portion, it is possible to prevent the conveyance wind from entering the flow-down case 46 by the switching shutter 47, so that the fertilizer blows up when the conveyance wind enters the fertilizer tank 67 and the supply of fertilizer is performed. The amount is prevented from being disturbed, the fertilizer can be reliably supplied to the field, and the crop grows well.

  In addition, when the fertilizer is discharged from the fertilizer, the non-circular arc-shaped section of the switching shutter 47 becomes an inclined surface that allows the fertilizer to flow down toward the external discharge duct 34a. Since the discharge work can be performed efficiently, the work efficiency is improved as compared with the conventional work.

  Since the contact area of the flow-down case 46 contacts the surface of the circular section of the feeding roll 45, the timing at which the fertilizer received by the groove-shaped recess 45a of the feeding roll 45 falls can be made constant, and the supplied fertilizer is Spreading over a wide area is prevented, fertilizer supply is stabilized, and crop growth is improved.

  According to the third aspect of the invention, in addition to the effect of the second aspect of the invention, by providing the blocking plate 47a in a part of the switching shutter 47, the conveyance air moving through the conveyance air passage 33 is blocked. Since it can be blown back in contact with the plate 47a, it becomes easy for the conveying wind to enter the flow-down case 46 during fertilization work, the fertilizer is reliably supplied from the fertilization hose 62 to the field, and the growth of the crop is improved. .

  In addition, since the fertilizer can be prevented from moving to the transport passage until it passes through the blocking plate 47a during the operation of discharging the fertilizer to the outside of the machine body, the fertilizer is sent to the location where the transport wind is blowing strongly, so the fertilizer Can be reliably discharged.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, when the switching operation member 49 is moved, the switching shutter 47 that is separated from the wind generating device 69. By turning the fertilizer tank 67 so that the outlet of the fertilizer tank 67 is narrow, it is possible to prevent a large amount of fertilizer from being discharged at one time, so that the transport wind reaches the end of the transport wind passage 33 without weakening and the fertilizer is surely received. Discharged.

  When the switching operation member 49 is operated in accordance with the discharge amount of the fertilizer, the fertilizer on the side away from the wind generating device 69 can also be reliably discharged with the transport air, so that the fertilizer remains in the transport air passage 33. Thus, the labor required for cleaning the fertilizer tank 67 is reduced.

  In other words, this configuration increases the amount of discharge from the fertilizer tank 67 on the side close to the blower 69 at the start of the fertilizer out-of-machine discharge operation, and decreases the discharge amount on the far side (the far side is initially zero discharge amount). However, if the amount of fertilizer stored in the fertilizer tank 67 on the side close to the blower 69 decreases, the switching operation member 49 can be moved to increase the opening on the side away from the blower 69, thereby increasing the amount of fertilizer released. .

  According to the fifth aspect of the invention, in addition to the effect of the first aspect of the invention, the amount of fertilizer discharged can be changed in accordance with the remaining amount of the fertilizer in the fertilizer tank 67, so that the fertilizer is conveyed. It is prevented that the air enters the passage too much and cannot be transported by the transport air, and the efficiency of the fertilizer discharging work is improved as compared with the conventional method.

Further, when the amount of fertilizer in each strip is small, the fertilizer in all the strips can be discharged, and the time required for the fertilization work is shortened.
When the remaining amount of fertilizer in each row is large, a large amount of fertilizer is discharged from the fertilizer tank 67 close to the wind-up device 69, and when the remaining amount of fertilizer on the side close to the wind-up device 69 decreases, the fertilizer tank 67 on the far side Since the amount of fertilizer discharged can be increased, the efficiency of the fertilizer discharging work is improved.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the sliding passage 60 is provided inside the conveying air passage 33, By combining the opening 33a and the opening 60a of the sliding passage 60 into a fertilizer discharge form, it is possible to prevent the fertilizer from moving to the transport passage 33 side at times other than during the fertilizer discharge operation. Occasionally, the fertilizer is prevented from moving to the conveyance path 33 side, and a set amount of fertilizer can be reliably supplied to the field, so that the growth of the crop is improved.

  Since the fertilizer discharge part 60b provided in the edge part of the sliding channel | path 60 will move in the direction away from the traveling vehicle 1 if it is set as the fertilizer discharge form, an operator can stand easily near the fertilizer discharge part 60b, and the fertilizer collection | recovery member Can be installed freely, improving work efficiency.

  Even if the traveling vehicle 1 and the rear wheel 7 are soiled with mud, the worker can perform the fertilizer collection work without getting close to the work vehicle, so that the work efficiency is improved and the worker is prevented from being soiled with the mud. .

It is a side view of the riding type rice transplanter with a fertilizer application of the example of the present invention. It is a top view of the riding type rice transplanter with a fertilizer application of FIG. It is a rear view of the fertilizer application of FIG. It is an internal structure figure of the fertilizer supply part vicinity of the fertilizer application of FIG. It is a structural diagram at the time of moving a switching shutter so that a fertilizer can be conveyed only to the off-machine discharge duct side of the fertilizer application of FIG. FIG. 3 is a structural diagram when the switching shutter is moved to a blocking position of a discharge path that does not move the conveying wind to both the fertilization duct side and the external discharge duct side of the fertilizer of FIG. 1. It is the longitudinal cross-sectional view (FIG. 7 (a), FIG.7 (b)) and the perspective view (FIG.7 (c)) of a shutter of the feeding roll part of the fertilizer which looked at the modification of FIG. 1 from the body front side. . 1 is a layout diagram of the flow down case, blower, and duct of the fertilizer shown in FIG. 1 (FIG. 8A) and a schematic cross-sectional view when the size of the flow path to the blower is adjusted by a switching shutter (FIG. 8B, FIG. c) and FIG. 8 (d)). It is a flowchart which controls the opening degree of a switching shutter according to the detection result of a residual amount detection sensor. It is a perspective view (Drawing 10 (a) and Drawing 10 (b)) of a duct of one modification of a fertilizer application of Drawing 1, and a body front view (Drawing 10 (c)) showing arrangement of a fertilizer tank and a duct. It is a block diagram at the time of arrange | positioning a biaxial feeding roll in parallel in the flow-down case of each row | line of the fertilizer of FIG. 1, Fig.11 (a) is a longitudinal cross-sectional view of the feeding roll part seen from the body front, FIG. FIG. 11B is a plan view of FIG. It is explanatory drawing about the interlocking mechanism of the feeding drive shaft for the feeding of the fertilizer and the drive shaft of a feeding roll in each row | line | column of the fertilizer of FIG. It is a figure which shows the interlocking mechanism of a feeding drive shaft at the time of applying the mechanism of FIG. 12 to a 4-row planting fertilizer (seedling planting machine). It is a principal part top view (FIG. 14 (a)) and principal part side view (FIG.14 (b)) at the time of dividing the fertilizer tank of the modification of the fertilizer shown in FIG. 1 is a configuration diagram in which a fertilizer tank divided into three by a parallel link of a modification of the fertilizer applicator shown in FIG. 1 can be divided and moved (FIG. 15A is expanded and arranged in parallel. FIG. 15B is a side view when the fertilizer tanks are stacked one above the other.

A six-row planting type rice transplanter as an embodiment of the working machine 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, the riding type rice transplanter (fertilizer applicator) mounts a seedling planting device 3, which is a kind of working device, on a traveling vehicle 1 with a lifting link device 2. The fertilizer applicator 4 is provided and is configured to function as a riding fertilizer planting machine as a whole. The traveling vehicle 1 is a four-wheel drive vehicle having a pair of left and right front wheels 6 and 6 and rear wheels 7 and 7 as drive wheels.

In this specification, the left and right sides in the forward direction of the rice transplanter are referred to as the left side and the right side, respectively, the forward direction is referred to as the front side, and the reverse direction is referred to as the rear side.
As shown in FIG. 1, a mission case 11 and an engine 12 are disposed on main frames 10 a and 10 b, and a hydraulic pump 13 is assembled integrally with the case 11 on the rear side surface of the mission case 11. A steering post 14 projects from the front part.

  A steering handle 16 is provided at the upper end of the steering post 14. A step floor 19 serving as a control floor is attached to the upper part of the airframe, and a cockpit seat 20 is installed above the engine 12. A shift lever 17 is provided on the right side of the steering handle 16, and a saddle clutch lever 18 is provided on the right side of the cockpit 20.

  The front wheels 6, 6 are pivotally supported by front wheel support cases 22, 22 provided on the side of the mission case 11 so that the direction can be changed. The rear wheels 7 and 7 are pivotally supported via rear wheel support bodies 30 on rear wheel transmission cases 24 and 24 attached to both left and right ends of the left and right frame 37. The left and right frames 37 are supported at the rear ends of the main frames 10a and 10b.

  As shown in FIG. 1 and FIG. 2, a part of the power transmission mechanism to the rear wheel 7, the rotational power of the engine 12 passes through a pulley 27, a belt 28, and a pulley 29 in order, and is a hydraulic continuously variable transmission (HST). ) Is transmitted to the input shaft 32 a of 31, and is transmitted to the mission case 11 from the output shaft 32 b of the HST.

  Rear end portions of the rear output shafts 11a and 11b protrude rearward of the transmission case 11, and 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 protruding end portions. The left and right rear wheels 7 and 7 are driven and rotated by the left and right rear wheel transmission shafts 35 and 35, respectively.

The seedling planting device 3 is mounted on the traveling vehicle 1 so as to be movable up and down by a lifting and lowering link device 2.
The upper end of a 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 lifting valve is operated by a hydraulic pump 13 provided on the traveling vehicle 1. The seedling planting device 3 connected to the lifting link device 2 is moved up and down by supplying and discharging pressure oil to and from the lift cylinder 36 (not shown), and extending and retracting the piston of the lift cylinder 36. It is comprised so that.

  The seedling planting device 3 includes a planting transmission case 38 that also serves as a frame mounted on the rear part of the lifting link device 2 via the left and right frames 37 so as to be freely rollable, and a support member provided in the planting transmission case 38. A seedling mounting table 39 that is supported and reciprocates in the left-right direction of the machine, and a seedling planting tool 41 that is attached to the rear end portion of the planting transmission case 38 and plants seedlings one by one from the lower end of the seedling mounting table 39 to the field. The planting transmission case 38 includes a center (sensor) float 42, a side float 43, and the like, which are leveling bodies whose rear part is pivotally supported at the lower part of the planting transmission case 38 and whose front part is swingable up and down. The center float 42 and the side float 43 are provided so as to level the field and level the front of the field where the seedling is planted by the seedling planting tool 41. The PTO transmission shaft 40 (FIG. 1) has universal joints at both ends, and is provided to transmit power from the transmission case 11 to the planting transmission case 38 of the seedling planting device 3. The lifting link sensor 51 (FIG. 1) is provided between the lifting link base frame 15 erected on the main frames 10a and 10b and the lifting and lowering parallel link members 2a and 2b that move up and down. The potentiometer for detecting the movement of the link 79 can detect that the seedling planting device 3 has been raised to the highest position by manual operation or the like.

  An angle-of-attack sensor (not shown) provided at the front portion of the center float 42 detects the height of the seedling planting device 3 with respect to the ground, and is illustrated based on the detection value of the angle-of-attack sensor. The lift valve 36 is controlled by a control device that does not, and the vertical position of the seedling planting device 3 is controlled by the lift cylinder 36.

  That is, when it is detected by the angle-of-attack sensor that the front part of the center float 42 has been lifted beyond the appropriate range by an external force, the hydraulic oil pumped out from the transmission case 11 by the hydraulic pump 13 is sent to the lift cylinder 36. The piston is protruded to move the lifting link device 2 upward to raise the seedling planting device 3 to a predetermined position, and the angle of attack sensor detects that the front part of the center float 42 has fallen below the proper range. When this occurs, the pressure oil in the lift cylinder 36 is returned into the mission case 11 and the lifting link device 2 is moved downward to lower the seedling planting device 3 to a predetermined position.

  When the front part of the center float 42 is in the proper range (when the detected value of the angle of attack sensor is in the proper range and the seedling planting device 3 has the proper ground height), the inside of the lift cylinder 36 is The seed oil planting apparatus 3 is held at a fixed position by stopping the pressure oil from entering and exiting.

Thus, the center float 42 is used as a ground sensor for automatic height control of the seedling planting device 3.
The seedling planting device 3 has a four-row planting structure, a seedling transmission case 38 that also serves as a frame, and a seedling that carries seedlings and reciprocates left and right to feed seedlings one by one to the seedling outlet 39a (FIG. 2). A seedling planting tool 41 and the like for planting seedlings supplied to the mounting table 39 and the seedling outlet 39a in the field are provided. The seedling stage 39 can be supplied with seedlings from a preliminary seedling stage 99 attached to the front of the machine body.

  As shown in FIG. 1, a rotor 70 a is disposed in front of the center float 42, and the rotor 70 a is disposed in front of the rotor 70 b in front of the side float 43. 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 transmits power from the drive shafts (not shown) of both the rotors 70a and 70a. Power is transmitted from a pair of chains (not shown) in the pair of chain cases 71, 71. The rotor 70a is suspended through a spring 78 by a pair of link members 76, 77 whose upper ends are supported by the beam member 73.

  The pair of link members 76 and 77 are a first link member 76 whose one end is fixedly supported by the beam member 73 and a second link member 77 whose one end is rotatably connected to the other end of the first link member 76. The spring 78 is connected between the other end of the second link member 77 and a mounting piece rotatably supported by a reinforcing member (not shown).

  Further, the lower end portion of the rotor vertical position adjusting lever 81 is rotatably supported by the support frame 72. By rotating the first link member 76 upward, the rotor 70a can be raised upward via the second link member 77 and the spring 78. Although details are omitted, when the rotor 70a is moved upward, the rotor 70b is also moved upward at the same time.

  The fertilizer applicator 4 feeds the fertilizer in the fertilizer tank 67 downward by a fixed amount by the fertilizer feed section 68, and transfers the fed fertilizer to the fertilizer guide 80 through the fertilizer hose 62 by the blower 69, and the front side of the fertilizer guide 80 It is made to drop in the fertilization groove formed in the side part vicinity of a seedling planting strip by the grooving body 82 provided in.

  Further, the pedal 86 (FIG. 2) can operate both the main clutch and the left and right rear wheel brake devices (not shown), and is disposed on the lower right side of the steering handle 16. When the pedal 86 is depressed, the main The clutch is disengaged, the left and right rear wheel brakes are applied, and the aircraft stops.

  In addition, a front arm 88 projects from the front of the fuselage, and a center mascot 89 is detachably attached to the front arm 88 from the front end of the front arm 88, and the front arm 88 and the center mascot 89 are integrated. A ramp 89a is provided at the tip of the mascot 89, and the front arm 88 and the center mascot 89 serve as one lever. Further, side markers 44 are provided on both front sides of the step floor 19.

The transmission case 24 of the rear wheel 7 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.
One end of a hydraulic cylinder 92 for forced lowering of the rear wheel is connected to the lift link base frame 15. The tip of the piston 92 a of the hydraulic cylinder 92 is locked to the transmission case 24.

  As the rear wheel transmission case 24 rotates, the axle 23 of the rear wheel 7 moves up and down integrally 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.

  Further, a spring 94 is provided between the front end of the elastic rubber support arm 93 attached to the left and right rear wheel supports 30 rearward and the upper surface of the rear wheel transmission case 24, and the arm 93 and the rear wheel transmission case 24 are provided. An elastic rubber body 96 is attached between the upper portion of the elastic rubber member 96 and the upper portion thereof.

  Therefore, the rear wheel transmission case 24 is driven downward about the rotation fulcrum shaft 24a by the reaction force generated when the rear wheel 7 is rotated in the traveling direction independently at the left and right during forward high load, and automatically travels. The rear side of the vehicle 1 rises.

Hereinafter, the structure of each part of the fertilizer applicator 4 shown in FIGS. 3-15 is demonstrated.
FIG. 3 is a rear view of the fertilizer applicator 4 of FIG. 1, and FIG. 4 is an internal structure diagram of the vicinity of the fertilizer feed-out portion of the fertilizer applicator 4 of FIG.

  The fertilizer supply part 68 provided with the supply roll 45 (FIG. 4) which sends the fertilizer which falls to the lower part of the fertilizer tank 67 which stores a fertilizer is provided. Further, a fertilizer hose 62 (FIG. 1) that conveys the fertilizer to the field below the fertilizer feeding unit 68, a conveyance wind duct 33 that moves the fertilizer conveyance wind below the fertilizer tank 67, and the conveyance wind duct 33. There is a discharge port 33b at the front end of the blower 69 for supplying the conveying air to the air and the conveying air duct 33 on the side opposite to the installation part of the blower 69.

  The fertilizer tank 67 is shared by the respective strips, and a lid 67a that can be opened and closed is attached to the top. The lower portion of the fertilizer tank 67 is branched into a number of fertilizer strips and has a funnel shape, and the lower portion is connected to the upper end of the feeding portion 68.

  As shown in the longitudinal sectional view of the feeding roll portion viewed from the front side of the machine body in FIG. 4, the feeding portion 68 incorporates a feeding roll 45 that feeds the fertilizer in the fertilizer tank 67 downward. These feeding rolls 45 are rotating bodies in which a plurality of groove-shaped recesses 45a are formed on the outer periphery, and are fitted to a common sectional square-shaped feeding shaft 45b provided in the left-right direction so as to integrally rotate. Yes. When the feeding roll 45 rotates in the direction of arrow A in FIG. 4, the fertilizer dropped and supplied from the fertilizer tank 67 is accommodated in the recess 45 a and fed downward. The fertilizer fed by the feed roll 45 is discharged from the discharge port 68a at the lower end.

The number of the recesses 45a of the feeding roll 45 in the illustrated example is six at the same interval, and the amount of fertilizer fed is equalized in time.
Further, a brush (not shown) slidably in contact with the outer peripheral surface of the feeding roll 45a on the side (front side) where the recess 45a moves downward may be detachably provided inside the feeding portion 68. When there is a brush, the fertilizer is housed in the recess 45a of the feeding roll 45 in a state of being scraped off, and the amount of fertilizer fed by the feeding roll 45 is kept constant.

  As shown in FIG. 4, the fertilizer discharge path is arranged at substantially the same height position adjacent to the feeding roll 45, and the fertilizer hose 62 side fertilizer duct 34 b and the fertilizer is discharged out of the machine. A switching shutter 47 for switching is provided, and a flow-down case (capsule) 46 in which the fertilizer feeding unit 68 and the switching shutter 47 are installed is provided. When the fertilizer supply switching of the fertilizer duct 34b and the external discharge duct 34a is switched, the switching shutter 47 is a fertilizer release path via a blocking position that does not move the conveying wind to the fertilizer duct 34b side or the external discharge duct 34a side. 34 is switched.

  Therefore, by switching the fertilizer discharge path 34 with the switching shutter 47, the transport wind path 33 can be used as a transport path for transport wind to the fertilizer hose 62 and a discharge path for fertilizer to the outside of the machine. There is no need to divide the air passage 33 into fertilizer application and out-of-machine fertilizer discharge, and the configuration is simple.

  As shown in FIG. 4, when both the duct 34 b and the duct 34 a are closed by the shutter 47 so that the fertilizer supplied from the fertilizer tank 67 does not fall into the fertilization duct 34 b and the discharge duct 34 a outside the machine, The fertilizer supplied from the fertilizer tank 67 accumulates in the space that can be created. However, the surface of the fertilizer accumulated in the space forms an inclined surface at the upper part of the flow-down case 46 and moves the fertilizer supplied from the fertilizer tank 67 to the feed roll 68 side.

  Further, as shown in FIG. 5, the fertilizer can be easily discharged outside the apparatus by moving the switching shutter 47 so as to be conveyed only to the outside discharge duct 34 a side, closing the duct 34 b and opening the duct 34 a.

  Further, as shown in FIG. 4, the conveyance air passage 33 is disposed outside the machine body in the flow down case 46 and on the side where the switching shutter 47 is provided, and the switching shutter 47 having a fan-shaped cross section is provided on the front side of the machine body of the flow down case 46. A feeding roll 45 is provided on the rear side of the flow case 46. The contact area of the falling case 46 that contacts the surface of the fan-shaped section of the switching shutter 47 and the contact area of the falling case 46 that contacts the surface of the circular section of the feeding roll 45 are each formed in a circular arc shape. .

  In this way, the cross-sectional shape of the switching shutter 47 is fan-shaped, and the contact area of the flow-down case 46 that contacts the surface of the cross-sectional fan-shaped portion of the switching shutter 47 is an arc portion. It is possible to prevent the fertilizer from blowing into the fertilizer tank 67, preventing the fertilizer supply from being disturbed, and reliably supplying the fertilizer to the field. The crop grows better.

  In addition, when the fertilizer is discharged from the fertilizer, the non-arc portion of the cross-sectional fan shape of the switching shutter 47 becomes an inclined surface that allows the fertilizer to flow down toward the external discharge duct 34a as shown in FIG. Since the discharge work of fertilizer out of the machine can be performed efficiently, the work efficiency is improved as compared with the conventional one.

  Since the contact area of the flow-down case 46 is in contact with the surface of the circular section of the feeding roll 45, the timing at which the fertilizer received by the groove-shaped recess 45a of the feeding roll 45 falls can be made constant and supplied. The spread of fertilizer is prevented from spreading over a wide area, the supply of fertilizer is stabilized, and the growth of the crop is improved.

  As shown in FIG. 6, the switching shutter 47 is configured to switch the fertilizer discharge path 34 via the blocking position of the discharge path 34 that does not move the conveying wind to the fertilizer application duct 34 b side or the external discharge duct 34 a side. In this case, when the switching shutter 47 is switched, the switching shutter 47 is configured to pass through a blocking position that does not move the conveying wind to the fertilizer hose 62 side or the discharge side to the outside of the machine. Fertilizer remains in the fertilizer tank 67 and the fertilizer hose 62 because it is possible to prevent the fertilizer from moving carelessly into the tank 67 and the fertilizer hose 62 and to change the internal pressure. Can be prevented, and the fertilizer can be discharged reliably.

FIG. 7 is a longitudinal sectional view (FIGS. 7A and 7B) of the feeding roll portion as viewed from the front side of the machine body and a perspective view of the shutter (FIG. 7C).
A cross-sectional fan-shaped blocking plate 47a for blocking a part of the conveying air is provided at the lower end portion in the conveying direction of the conveying air in the cross-sectional fan-shaped switching shutter 47. By providing the shielding plate 47a in a part of the switching shutter 47, the conveying air moving in the duct (conveying air passage) 33 can be brought into contact with the shielding plate 47a and blown back. The wind can easily enter the falling case 46, the fertilizer is reliably supplied from the fertilizer hose 62 to the field, and the growth of the crop is improved.

  In addition, since the fertilizer can be prevented from moving to the duct 33 during the operation of discharging the fertilizer to the outside of the machine body until it passes through the blocking plate 47a, the fertilizer is sent to a location where the conveying wind is blowing strongly. Can be reliably discharged.

  The blocking plate 47a may be a separate member from the switching shutter 47, and may be bonded or welded to the switching shutter 47. Alternatively, the switching shutter 47 and the blocking plate 47a may be integrally formed. .

  As shown in the layout diagram of the flow-down case 46, the blower 69, and the duct (air chamber) 33 in FIG. 8A, the flow-down case 46 is disposed in the left-right direction of the body of the duct 33 for supplying the conveying air from the blower 69. A switching operation member (such as a lever or an electric motor) 49 is provided for interlocking the strip switching shutter 47 while gradually shifting it. Then, the drive shaft 47b common to all the switching shutters 47 is rotated in conjunction with the switching operation member 49. Each switching shutter 47 is fixedly supported on the driving shaft 47b at a predetermined mounting angle, so that when the switching operation member 49 is rotated by a predetermined angle, each switching shutter 47 is rotated by the mounting angle with respect to the driving shaft 47b. Thus, a different opening degree of the fertilizer discharge path 34 is obtained for each switching shutter 47.

  When the switching operation member 49 is operated to the fertilizer discharge operation side, the switching shutter 47 on the side close to the blower 69 opens the outlet of the fertilizer tank 67 widely as shown in FIG. As shown in FIG. 8C, the switching shutter 47 on the side far from the blower 69 opens the fertilizer tank 67 narrowly, and the switching shutter 47 in the middle position of the duct 33 narrows the fertilizer tank 67 outlet as shown in FIG. Are attached to the switching shutter drive rod 47a so that they can be driven by the switching operation member 49 so as to be rotated so as to be rotated to an intermediate position between the case where it is to be widened and the case where it is widened, and the outlet of each fertilizer tank 67 is opened. It was set as the structure which changes a degree.

  Thus, at the start of the discharge operation of fertilizer, the amount of fertilizer discharged from the fertilizer tank 67 on the side closer to the blower 69 is increased, and the amount of fertilizer discharged is reduced on the far side (the side far from the blower 69 is initially discharged). It may be 0). Further, when the amount of fertilizer stored in the fertilizer tank 67 on the side close to the blower 69 decreases, the switching operation member 49 is operated so as to increase the opening degree on the side away from the blower 69, thereby increasing the amount of fertilizer released. To do.

  When the switching operation member 49 is moved, a large amount of fertilizer is discharged at a time because the switching shutter 47 located farther from the blower (winding device) 69 has a rotation amount that opens the fertilizer tank 67 narrower. Therefore, the conveying air reaches the end of the duct 33 without weakening, and the fertilizer is reliably discharged.

  When the switching operation member 49 is operated in accordance with the amount of fertilizer discharged, the fertilizer on the side away from the blower 69 can also be reliably discharged by the conveying wind, so that it is prevented that the fertilizer remains in the duct 33 and the fertilizer tank The labor required for cleaning 67 is reduced.

  A plurality of remaining amount detection sensors 48 for detecting the amount of fertilizer remaining in the fertilizer tank 67 using a switching operation lever or a switching operation actuator as the switching operation member 49 and using a switching actuator that can be switched in multiple stages as the switching operation actuator. (Refer to FIG. 4, placed on the lower part of the fertilizer tank 67.) When there is no more fertilizer in contact with the fertilizer, it will not be energized and a notification sensor (not shown) for notifying that the fertilizer has run out is arranged in 3 to 5 steps in the vertical direction. When the detection result of the remaining amount detection sensor 48 is less than a predetermined number (1 or 2), all switching is performed. The switching actuator is operated until the shutter 47 is fully opened to the out-of-machine discharge position (the remaining amount of fertilizer does not clog even if discharged all at once.) When the number of detections of the sensor 48 is a predetermined number or more (2 or 3 or more), the switching actuator is arranged so that the opening degree of the switching shutter 47 on the side close to the blower 69 is wide and the opening degree of the switching shutter 47 on the far side is narrow. When the number of detections of the remaining number detection sensors 48 of the plurality of strips (the first to third strips) close to the blower 69 becomes less than a predetermined number (1 or 2), the opening degree of the switching shutter 47 far from the blower 69 is increased. The switching actuator is operated so as to be wide.

  Thus, since the amount of fertilizer discharged can be changed in accordance with the remaining amount of fertilizer in the fertilizer tank 67, it is prevented that the fertilizer gets too much into the duct 33 and cannot be transported by the transport wind, and the fertilizer is discharged. The efficiency is improved more than before.

  Further, when the amount of fertilizer in each strip is small, the fertilizer in all the strips can be discharged, and the time required for the fertilization work is shortened. When the remaining amount of fertilizer in each row is large, a large amount of fertilizer is discharged from the fertilizer tank 67 close to the blower 69. When the remaining amount of fertilizer near the blower 69 decreases, the discharge of fertilizer from the far side fertilizer tank 67 Since the amount can be increased, the efficiency of discharging fertilizer is improved as compared with the conventional method.

FIG. 9 shows a flowchart for controlling the opening degree of the switching shutter 47 according to the detection result of the remaining amount detection sensor 48 for all the strips.
FIG. 10 is a perspective view (FIGS. 10A and 10B) of a duct through which a fertilizer conveying wind according to a modified example flows, and a front view of the body (FIG. 10C) showing the arrangement of the fertilizer tank and the duct. Show.

  A sliding passage 60 in which openings 60a are formed at the same interval as the openings 33a of the duct 33 provided at a predetermined interval inside the duct 33 is provided, and a fertilizer discharge portion 60b is formed at the end of the sliding passage 60, When the duct opening portion 33a and the sliding passage opening portion 60a shown in FIG. 10A are not aligned, the opening portion 60a of the sliding passage 60 and the opening portion 33a of the duct 33 shown in FIG. The fertilizer is discharged from the sliding passage 60 via the duct 33. When the fertilizer is discharged to the outside of the airframe, the sliding passage 60 is moved outward from the airframe and moved to a position away from the traveling vehicle body 1.

  By providing a sliding passage 60 inside the duct 33 and combining the opening 33a of the duct 33 and the opening 60a of the sliding passage 60 to form a fertilizer discharge form, the fertilizer is ducted at times other than during the fertilizer discharge operation. Since it can prevent moving to 33 side, it can prevent that a fertilizer moves to the duct 33 side at the time of a fertilization operation | work, can supply a set amount of fertilizer to a farming field reliably, and the growth of a crop becomes favorable.

  If the fertilizer discharge mode is adopted, the fertilizer discharge portion 60b provided at the end of the sliding passage 60 moves in a direction away from the traveling vehicle 1, so that an operator can easily stand near the discharge port 60b, and a fertilizer recovery member is provided. Since it can be installed freely, the work efficiency is improved compared to the conventional one.

  In addition, even if the traveling vehicle 1 and the rear wheel 7 are soiled with mud, the worker can perform the fertilizer collection work without getting close to it, which improves work efficiency and prevents the worker from being soiled with mud. Is done.

  FIG. 11 explains the configuration when biaxial feeding rolls are arranged in parallel in the flow-down case of each strip (FIG. 11 (a) is a longitudinal sectional view of the feeding roll portion viewed from the front of the machine body, FIG. 11 (b)). Fig. 11 (a) is a plan view).

  Biaxial feed rolls 45, 45 are arranged in parallel in the flow-down case 46 of each strip, and a feed drive shaft 50 for driving the feed shaft 45 b of the feed roll 45 is provided on the side of the flow-down case 46. Then, the gear 58 provided on the drive shaft 50 and the gear 52a provided on the feed shaft 45b of the first feed roll 45 are meshed so that power is transmitted from the drive shaft 50 to the feed shaft 45b of the first feed roll 45, and By engaging the gear 52a provided on the feeding shaft 45b of the first feeding roll 45 with the gear 52b provided on the feeding shaft 45b of the second feeding roll 45, the power of the drive shaft 50 is supplied to the first feeding roll 45 and the second feeding roll. Each of the 45 feeding shafts is sequentially transmitted.

  In addition to the gears 52a and 52b, discs 53a and 53b for releasing the meshing of the gears 52a and 52b are provided on the feeding shafts 45b and 45b, respectively, on the feeding shafts 45b and 45b of the first feeding roll 45 and the second feeding roll 45. It is slidably attached to. When the disks 53a and 53b are moved along the feeding shafts 45b and 45b, the coaxial roll driving gears 52a and 52b slide.

  Further, a shifter 54 having the feeding shafts 45 b and 45 b of the first feeding roll 45 and the second feeding roll 45 is provided between the first feeding roll 45 and the second feeding roll 45. The shifter 54 includes a rotation shaft 54 a and a protrusion 54 b in a direction orthogonal to the respective feeding shafts 45 b of the first feeding roll 45 and the second feeding roll 45.

  Accordingly, when the shifter 54 is rotated, the projection 54b moves the disks 53a and 53a of the first feeding roll 45 and the second feeding roll 45 along the axial direction of the feeding shafts 45b and 45b, respectively.

  When the shifter 54 is rotated in the direction of arrow a in FIG. 11B, the disc 53a of the first feeding roll 45 is fed in a direction in which the gear 52b of the second feeding roll 45 is disengaged from the gear 52a of the first feeding roll 45. It moves along the axial direction of the shaft 45b.

  Therefore, the meshing of the gears 52a and 52b of the feeding shafts 45b and 45b of the first feeding roll 45 and the second feeding roll 45 is released, and the second feeding roll 45 is not driven. In this case, since the first feed roll 45 is driven, the feed amount of the fertilizer is half that when both the feed rolls 45, 45 are driven.

  On the contrary, when the shifter 54 is rotated in the direction of the arrow b, the disc 53a of the first feeding roll 45 moves the feeding shaft 45a in a direction in which the gear 52a of the first feeding roll 45 and the gear 52b of the second feeding roll 45 are disengaged. The first feed roll 45 is not driven by moving along the axial direction. In this case, since both the first feeding roll 45 and the second feeding roll 45 are not driven, the fertilizer cannot be fed, and the feeding is stopped.

Thus, the fertilizer feed amount can be adjusted by the drive control of the first feed roll 45 and the second feed roll 45.
Next, the interlocking mechanism of the feeding drive shaft 50 for feeding fertilizer and the feeding shaft 45b which is the driving shaft of the feeding roll 45 will be described with reference to FIGS.

  Fertilization power to the feed drive shaft 50 is transmitted from a feed transmission input shaft (not shown) via a fertilizer clutch 55. The fertilization clutch 55 is turned on and off by a single clutch lever 56 provided at the end of the feeding drive shaft 50.

  FIG. 12 shows a gear (not shown) of one fertilization clutch 55c out of two fertilization clutches 55c and 55d corresponding to gears 57c and 57d respectively fixed to the feeding shafts 45b and 45b of the two feeding rolls 45 and 45. And the state (right side) not engaged with the gear (not shown) of the other fertilization clutch 55d. A gear (not shown) having a width twice that of the gears 57c and 57d of the feeding shafts 45b and 45b of the feeding rolls 45 and 45 is provided in the fertilizer clutches 55c and 55d. 12 is moved in the right direction of the machine body, the fertilizer clutch 55c that moves integrally with the feeding drive shaft 50 is kept engaged with the gear 57c fixed to the feeding shaft 45b of the left feeding roll 45. The gear 57d fixed to the feeding shaft 45b of the right feeding roll 45 does not mesh with the gear of the fertilizer clutch 55d. Thus, since the left feeding roll 45 is driven, fertilization is performed. However, since the right feeding roll 45 is not driven, fertilization is not performed. By sequentially shifting the fertilizer clutches 55c and 55d in this manner, the fertilizer clutches 55c and 55d can be disconnected in units of one line from the end.

FIG. 13 is a diagram showing an interlocking mechanism of the feeding drive shaft 50 and the feeding shaft 45b of the feeding roll 45 when the mechanism of FIG. 12 is applied to a four-row planting fertilizer (seedling planting machine).
The feed drive shaft 50 has (1) a first roll and a right fourth feed roll 45 in the order from left to right (this feed roll 45 is a feed roll 45 common to the first left and fourth right rolls). The same applies hereinafter.) The state in which the first fertilizing clutch 55a for operating the feeding shaft 45b is engaged with the gear 57a of the feeding shaft 45b of the feeding roll 45, (2) the second left and third right The state in which the second fertilization clutch 55b for operating the feeding shaft 45b of the feeding roll 45 is engaged with the gear 57b of the feeding shaft 45b, (3) the feeding shaft 45b of the left third and right second feeding roll 45 A state in which the third fertilization clutch 55c for the operation is engaged with the gear 57c of the feeding shaft 45b of the feeding roll 45, (4) for the operation of the feeding shaft 45b of the left fourth and right first feeding roll 45 No. 4 fertilization clutch 55d is a feeding roll Shows 5 a state of the gear 57d meshes unwinding shaft 45b, respectively.

  When the lever 56 moves the feeding drive shaft 50 in the right direction of the machine shown in FIG. 13, (1) the left first and fourth right feeding rolls 45 (the feeding roll 45 is the left first and right The first fertilizing clutch 55a for operating the feeding shaft 45b of the feeding roller 45 common to the fourth item (hereinafter the same) is not engaged with the gear 57a of the feeding shaft 45b, but the left second item and the right third item. The second fertilization clutch 55b for operating the feeding shaft 45b of the feeding roll 45 and the gear 57b of the feeding shaft 45b are engaged, and the feeding shaft 45b of the left third and right second feeding roll 45 is operated. The engagement of the third fertilization clutch 55c with the gear 57c of the feeding shaft 45b, and the operation of the feeding shaft 45b of the left fourth and right first feeding roll 45 of the feeding ferrule 45d and the feeding shaft 45b. The meshing with the gear 57d is Remain in it.

  In this way, by moving the lever 56 little by little at regular intervals from side to side, the gears 57a to 57d for interlocking with the feeding roll 45 and the fertilizer driving shaft 50 are disengaged sequentially from the end, and fertilizer driving is performed in increments of one line from the end. Can be cut off. Each of the strip clutches 55 can be driven by a single lever 56, which can simplify and reduce the cost, and at the same time, the effect can be further improved by interlocking with the hook clutch.

  In the fertilizer applicator shown in FIG. 14, a shutter 58 is provided below the fertilizer tank 67. Further, the fertilizer tank 67 is divided into left and right at the center. In addition, in FIG. 14, the example which divided | segmented the fertilizer of 6 row planting into the part for every 3 right and left is shown. Fig.14 (a) is a principal part top view of a fertilizer applicator, FIG.14 (b) is a principal part side view of a fertilizer applicator.

  The pair of rotating arms 59 is arranged at the front lower part of the fertilizer tank 67 so that the longitudinal direction thereof is parallel to the longitudinal direction of the fertilizer tank 67, and one end of each arm 59 is horizontally oriented at the rear left and right ends of the step floor 19. Alternatively, the arm 59 is supported so as to be rotatable in the vertical direction, and the other end of the arm 59 is supported at the end of the bottom portion of the fertilizer tank 67 located on the machine body central side.

  Accordingly, each arm 59 supported at one end so as to be rotatable or vertically movable is arranged in parallel behind the step floor 19 and arranged on the left and right side surfaces of the step floor 19 or moves upward from the step floor 19. Thus, it can be freely rotated in the state of being arranged. For example, when the left and right side surfaces of the step floor 19 are arranged, the left fertilizer tank 67 can be moved to the front right of the body and the right manure tank 67 can be moved to the left front of the body.

  As a result, when the fertilizer is replenished from the dredger, the fertilizer tank 67 comes to the vicinity of the dredge in front of the aircraft. Disappear. Further, when the fertilizer tank 67 is moved forward, the upper space at the position where the fertilizer tank 67 is located behind the step floor 19 is vacant, so that if the seedlings are replenished in this state, the work can be performed extensively. When a rail (not shown) that can be expanded and contracted is attached to the arm 59, the fertilizer tank 67 can be brought closer to the ridge.

  FIG. 15 shows a configuration in which a fertilizer tank divided into three parts by parallel links can be divided and moved. FIG. 15A is a side view when the fertilizer tank divided into three parts is developed and arranged in parallel, and FIG. 15B is a side view when the fertilizer tanks are stacked one above the other.

  The fertilizer tank 67 is divided every 2 to 4 lines. In the example shown in FIG. 15, the fertilizer tank 67 divided into three connects two adjacent fertilizer tanks 67 with parallel links 61, 61 that are pivotably directed to the side surfaces of the fertilizer tank 67. A lid 67 a that covers the entire three fertilizer tanks 67 is provided separately.

  Conventionally, fertilizer supply to the fertilizer tank 67 and cleaning have to be performed for each article, and it has been laborious to move the fertilizer bag and remove the fertilizer tank 67, but by using the above configuration, fertilizer supply When moving or discharging, the parallel links 61 and 61 can be moved so that the three fertilizer tanks 67 can be stacked in a stacked state as shown in FIG. 15B, and can be replenished without moving the fertilizer bag and can be discharged easily. Reduce labor.

  The present invention can be applied to a working machine such as a riding rice transplanter.

DESCRIPTION OF SYMBOLS 1 Traveling vehicle 2 Elevating link apparatus 2a, 2b Parallel link member 3 Seedling planting apparatus 4 Fertilizer 6 Front wheel 7 Rear wheel 10a, 10b Main frame 11 Transmission case 11a, 11b Rear output shaft 12 Engine 13 Hydraulic pump 14 Steering post 15 Lifting link base frame 16 Steering handle 17 Shift lever 18 畦 Clutch lever 19 Step floor 20 Pilot seat 22 Front wheel support case 23 Rear wheel axle 24 Rear wheel transmission case 24a Rotating fulcrum shaft 25 Transmission shaft 27 Pulley 28 Belt 29 Pulley 30 Rear wheel Support 31 Hydraulic continuously variable transmission (HST)
32a Input shaft 32b Output shaft 33 Conveyance air duct 33 Conveyance air passage (duct)
33a Duct opening 33b Release port 34 Fertilizer discharge path 34a Exhaust discharge duct 34b Fertilizer duct 35 Left and right rear wheel drive shaft 36 Lift cylinder 37 Left and right frame 38 Planting drive case 39 Seedling stand
39a Seedling outlet 40 PTO transmission shaft 41 Seedling attachment tool 42 Center float 43 Side float 44 Side marker 45 Feeding roll 45a Feeding roll recess 45b Feeding roll feeding shaft 46 Flowing case (capsule)
47 switching shutter 47a switching shutter blocking plate 48 remaining amount detection sensor 49 switching operation member (lever or electric motor, etc.)
DESCRIPTION OF SYMBOLS 50 Feeding drive shaft 51 Lifting link sensor 52, 52a, 52b Gear 53a, 53b of feeding roll feeding shaft Disk 54 Shifter 54b Shifter protrusion 55 Fertilization clutch 56 Clutch lever 57 Feeding roll feeding shaft gear 58 Drive shaft gear 59 Rotating arm 60 Sliding passage 60a Sliding passage opening 60b Fertilizer discharge portion 61 Parallel link 62 Fertilizer hose 67 Fertilizer tank 67a Lid 68 Fertilizer feeding portion 68a Discharge port 69 Blower 70a Rotor 70b Rotor 71 Chain case 72 Support frame 73 Beam member 76, 77 Link member 78 Spring 79 Link 80 Fertilizer guide 81 Rotor vertical position adjustment lever 82 Groove body 86 Pedal 88 Front arm 89 Center mascot 89a Ramp 92 Hydraulic cylinder 93 Elastic rubber support arm 94 Spring 96 Elastic go Body 99 preliminary seedling the platform

Claims (6)

A fertilizer tank (67) for storing fertilizer;
A fertilizer feed section (68) for feeding the fertilizer falling to the bottom of the fertilizer tank (67);
A fertilizer supply member (62) that conveys the fertilizer toward the field below the fertilizer feed section (68);
A transport air passage (33) through which the fertilizer transport air moves below the fertilizer tank (67);
In a fertilizer applicator provided with a wind-up device (69) for supplying conveyance air to the conveyance air passage (33),
The fertilizer feed part (68) is provided with a feed roll (45) for feeding the fertilizer in a fixed amount.
At a position adjacent to the feeding roll (45), a fertilizer discharge path (34) is provided to a fertilizer duct (34b) on the fertilizer supply member (62) side and an external discharge duct (34a) on the side from which the fertilizer is discharged to the outside. A switching shutter (47) for switching is provided,
A downflow case (46) is provided to house the fertilizer feed part (68) and the switching shutter (47),
The switching shutter (47) conveys both the fertilizer duct (34b) and the external discharge duct (34a) when the fertilizer supply is switched between the fertilizer duct (34b) and the external discharge duct (34a). A fertilizer applicator characterized in that the fertilizer release path (34) is switched via a blocking position where the wind is not moved. A conveyance air passage (33) is arranged outside the machine body of the flow down case (46) and on the side where the switching shutter (47) is provided,
A switching fan (47) having a fan-shaped cross section is provided on the front side of the fuselage case (46).
A feeding roll (45) having a circular cross section having a plurality of groove-shaped recesses (45a) is provided on the machine body rear portion side of the flow-down case (46),
The contact area of the flow down case (46) that contacts the surface of the sectional fan-shaped portion of the switching shutter (47) and the contact area of the flow down case (46) that contacts the surface of the circular cross section of the feeding roll (45) are respectively 2. The fertilizer applicator according to claim 1, wherein the fertilizer applicator is formed in an arc shape in cross section. A cross-sectional fan-shaped blocking plate (47a) for blocking a part of the conveying air is provided at the lower end of the conveying air in the conveying direction in the sectional fan-shaped switching shutter (47). Item 3. A fertilizer applicator. Arranging the wind generator (69) on the left and right sides of the conveying air passage (33),
A switching operation member (49) for operating the plurality of switching shutters (47) in conjunction with each other is provided,
When the switching operation member (49) is operated to the fertilizer out-of-machine discharge side, the switching shutter (47) on the side close to the wind generator (69) opens the outlet of the fertilizer tank (67) widely and the wind generator The switching shutter (47) on the side far from (69) is configured to change the opening degree of the fertilizer tank (67) so that the outlet of the fertilizer tank (67) is narrowly opened. The fertilizer applicator according to any one of 3 above. Using a switching operation actuator (49) including a switching operation lever or a switching operation actuator including a switching actuator that can be switched in multiple stages,
A plurality of remaining amount detection sensors (50) for detecting the amount of fertilizer remaining in the fertilizer tank (67) are arranged side by side at locations corresponding to the seedlings of each seedling,
When the total number of remaining amount detection sensors (50) is less than a predetermined number, the switching actuators are operated until all the switching shutters (47) fully open the discharge position outside the apparatus,
When the total number of remaining amount detection sensors (50) is greater than or equal to a predetermined number, the opening degree of the switching shutter (47) on the side close to the wind generator (69) is wide and the switching shutter (47) on the far side is wide. Operate the switching actuator so that the opening of
When the number of detections of the plurality of remaining amount detection sensors (50) close to the wind-up device (69) becomes less than a predetermined number, the opening degree of the switching shutter (47) on the side far from the wind-up device (69) is increased. The seedling transplanting machine according to claim 1, wherein the switching actuator is operated. Inside the conveyance air passage (33), openings (33a) of the conveyance air passage (33) are provided at predetermined intervals.
An opening (60a) having the same interval as the opening (33a) of the conveying air passage (33) is formed, and a sliding passage (60) in which a fertilizer discharging portion (60b) is formed at the end is provided as a conveying air passage (33). ) Is slidable inside,
When combining the opening (60a) of the sliding passage (60) and the opening (33a) of the conveying air passage (33) to form a fertilizer discharging form, the sliding passage (60) is moved outward from the machine body, The fertilizer applicator according to any one of claims 1 to 5, characterized in that the fertilizer is moved to a position separated from the traveling vehicle (1).

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