JP2010172276A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling transplanter of simple structure with no complication in the setup of various kinds of cables, good in terms of maintenance. <P>SOLUTION: The seedling transplanter for multirow-planting use, is configured such that a cable 72 for planting use and a cable for seedling-feed cable 73 for operating the partial clutch 51 for planting use of a seedling planter 13 for the corresponding rows and the partial clutch 53 for seedling feeding use of a seedling feeder 6 respectively are linked to a common operating arm 80. In this transplanter, the cables 72 and 73, in the vicinity of an operating arm junction, are both arranged in parallel to each other so that their longitudinal directions are the same as each other and set up; of the cables 72 and 73, for one, the inner cables (72a and 72b) are linked to the operating arm 80, while for the other, the outer cables (73A and 73B) are linked to the operating arm 80. Thanks to the above-mensioned construction, the cables' setups are not complicated and simplified, the cables constitute no hindrance in making their maintenance, leading to being good in terms of maintenance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a seedling transplanting machine for sending seedlings on a seedling mounting stand to a seedling outlet and planting them in a field from the seedling outlet.

  Conventionally, a seedling platform that supplies a plurality of seedlings on the left and right corresponding to the seedling mounting section corresponding to the seedling mounting section by placing the seedlings on the seedling mounting sections provided on the left and right and moving left and right, Taking seedlings at the exit and planting them Seedling planting units equipped with a plurality of seedling planting devices provided on the left and right, a powder storage unit for storing fertilizer and chemicals that become powder particles, and powder particles in the powder storage unit 2. Description of the Related Art A riding-type rice transplanter serving as a seedling transplanting machine provided with a powder body discharging device including a feeding unit that feeds a body by a predetermined amount and a float for leveling while sliding on a seedling planting surface is known.

  Such a riding type rice transplanter is also being developed with many functions concentrated due to recent technological advancement. And with this multi-functionality, the riding type rice transplanter moves the seedling stand up and down and moves the seedling amount adjustment lever and float to change the seedling amount to change the planting depth. Various levers such as a planting depth adjusting lever to be changed are provided, and a rational arrangement is considered in order to demand compactness and improve operability.

  For example, in the following Patent Document 1, a seedling planting portion is provided on a traveling vehicle body having left and right traveling wheels so as to be movable up and down via a lifting link mechanism, and the seedling planting portion moves left and right. Each seedling is taken out from the plant and transplanted to the field, and one end of the lead cam shaft that moves the seedling platform left and right is placed between the lifting link mechanism and one of the left and right traveling wheels in the left and right direction. A seedling transplanting machine is disclosed in which a seedling amount adjustment lever is disposed between one end and one of the left and right traveling wheels, and a planting depth adjustment lever is disposed between one end of the lead cam shaft and the lifting link mechanism.

JP 2007-53939 A

With the configuration described in Patent Document 1 above, levers such as a seedling adjustment lever and a planting depth adjustment lever can be arranged rationally and compactly while preventing interference between the wheel and the lifting link mechanism. Since they are concentrated on the same side, operability can be improved.
Further, according to Patent Document 1, the hook clutch cable for turning on and off the hook clutch provided for each two planting devices by one lever and the seedling feeding cable of the seedling feeding belt of the seedling stand are provided. A configuration for operation is disclosed.

  At the connecting part of these hook clutch cables and seedling feed cables, these cables are arranged on the left and right and below in the front view, and the installation locations of the cables are dispersed and arranged in multiple directions such as up and down, left and right, diagonally. The cable routing is complicated. Accordingly, even if the arrangement of the levers is made compact, the arrangement of the seedling transplanting machine is not simplified if the arrangement of the cables such as the hook clutch cable and the seedling feeding cable is complicated. If the cables are arranged in a crossing manner when maintaining the routing state of the clutch cable and the seedling feeding cable, they become obstructive at the time of maintenance, and the maintainability is inferior.

  Therefore, the problem of the present invention is that the arrangement of the connecting portions of various cables is not complicated, has a simple configuration, facilitates the arrangement of the hook clutch cable and the seedling feeding cable, and is excellent in maintainability of the cables. Is to provide a seedling transplanter.

The said subject is achieved by the following structure.
That is, the invention according to claim 1 includes a traveling vehicle body (1) provided with a traveling device (2, 3), and a plurality of seedling mounting portions (6e) provided on the left and right in the forward direction of the traveling vehicle body (1). The seedlings on the seedling mounting part (6e) are moved left and right and supplied one by one to the seedling outlets (6b) provided on the left and right so as to correspond to each seedling mounting part (6e). When the seedlings are taken out from the seedling outlet (6b), the seedling feeding device (6) for sending the seedlings in the next row to the seedling outlet (6b) by the seedling feeding belt (6c) and the seedling outlet (6b) are taken out. A seedling planting device (13) for planting seedlings, and a plurality of the seedling feeding belt (6c) and a seedling planting device (13) corresponding to a plurality of seedling outlets (6b), Partial planting plant for turning on and off the transmission to some seedling planting devices (13) of the seedling planting device (13) And a seedling feed partial clutch (53) for turning on and off the transmission to a part of the seedling feeding belt (6c) corresponding to the part of the seedling planting device (13). Planting cables (72a, 72b, 72A, 72B) comprising inner and outer for operating the partial clutch (51) and seedling feeding comprising inner and outer for operating the seedling feeding partial clutch (53) Cables (73a, 73b, 73A, 73B) are provided, and the planting partial clutch (51) is transmitted by pulling the inner cables (72a, 72b) of the planting cables (72a, 72b, 72A, 72B). When the inner cable (72a, 72b) of the planting cable (72a, 72b, 72A, 72B) is returned, the planting partial clutch (51) The transmission is cut off, and the transmission of the seedling feeding partial clutch (53) is cut off by pulling the inner cables (73a, 73b) of the seedling feeding cables (73a, 73b, 73A, 73B) and the seedling feeding cable (73a , 73b, 73A, 73B) by the return operation of the inner cables (73a, 73b), the transmission of the seedling feeding partial clutch (53) is turned on, and the corresponding planting partial clutch (51) And the planting cables (72a, 72b, 72A, 72B) and the seedling feeding cables (73a, 73b, 73A, 73B) for operating the seedling feeding partial clutch (53), respectively, to a common operating arm (80a, 80b) In the multi-row planting seed transplanter having the connected configuration, the operation arm (80a, 80b) and the planting cable (72a, 72b, 7) 2A, 72B) and seedling feeding cables (73a, 73b, 73A, 73B) and planting cables (72a, 72b, 72A, 72B) and seedling feeding cables (73a, 73b, 73A, 73B) in the vicinity of the connecting portion. Both are arranged so that the longitudinal direction is the same direction, and one of the planting cables (72a, 72b, 72A, 72B) and the seedling feeding cables (73a, 73b, 73A, 73B) is an inner cable ( 72a, 72b) is connected to the operation arm (80a, 80b), and the other is a seedling transplanter having an outer cable (73A, 73B) connected to the operation arm (80a, 80b).

  The seedling transplanting machine according to claim 1 arranges the planting cables (72a, 72b, 72A, 72B) and the seedling feeding cables (73a, 73b, 73A, 73B) so that the longitudinal directions thereof are aligned in the same direction. As a result, the cable arrangement is not complicated and simplified. Also, since the cables can be easily routed in this way, the seedling transplanter itself has a simple configuration, and the cables do not get in the way during maintenance, and the maintenance is excellent.

It is a side view of the riding type rice transplanter of one Embodiment of this invention. It is a top view of the rice transplanter of FIG. It is the figure which showed the transmission mechanism of the seedling planting part of the rice transplanter of FIG.1 and FIG.2. It is the figure which showed the connection part of the hook clutch of the rice transplanter of FIG. 1, and the cable for the action | operation. It is the figure which showed the connection part of the seedling feed belt of the rice transplanter of FIG. 1, and the cable for the action | operation. It is a front view of the saddle clutch unit of the rice transplanter of FIG. FIG. 7 is a simplified diagram showing the movement of the arm and cam in FIG. 6 in an easily understandable manner. It is a figure of the seedling tank vicinity of the riding type rice transplanter of 8 row planting. Fig.8 (a) is front sectional drawing (simplified figure) of a seedling tank, and FIG.8 (b) is the figure seen from the back side of the seedling tank. FIG. 5 is a perspective view of a servo motor when the clutch unit motor is a servo motor. Fig.10 (a) shows the top view of the soft / soft sensor for measuring the hardness of a field, and FIG.10 (b) is a side view of the hard / soft sensor of Fig.10 (a). 11 (a) is a simplified plan view of another example of the hardness / soft sensor using the rotating body shown in FIG. 10, and FIG. 11 (b) is a simplified side view of FIG. 11 (a). . It is a simplified side view at the time of providing a float sensor behind the center float of FIG. It is a side view of the hardness sensor of another example of the hardness sensor using the rotating body shown in FIG. FIG. 14A shows a plan view of a soft / soft sensor (width sensor) as another example of the hard / soft sensor using the rotating body shown in FIG. 10, and FIG. 14B shows a side view of FIG. 14A. It is. It is the figure which showed the partial side view at the time of providing the planting depth motor in the center float of the rice transplanter shown in FIG. The block diagram which changes the extrusion timing of the seedling by the seedling planting tool of the rice transplanter shown in FIG. 1 is shown. It is a simplified sectional side view of the direct sowing apparatus at the time of attaching the direct sowing apparatus instead of the seedling planting part shown in FIG.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a left side view of a rice transplanter as a seedling transplanter according to an embodiment of the present invention, and FIG. 2 shows a plan view (partially omitted) of the rice transplanter shown in FIG. Moreover, in FIG. 3, the transmission mechanism of the seedling planting part 4 of the rice transplanter of FIG.1 and FIG.2 is shown.
In this specification, the left and right directions are set to the left and right, respectively, in the forward direction of the direct seeding machine, the forward direction is set to the front, and the reverse direction is set to the rear.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed in the front part of the airframe. A front wheel final case (not shown) is provided on the left and right sides of the front wheel. Yes. Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel rolling shaft (not shown) provided horizontally in the front and rear at the center of the rear end of the main frame 15 is used as a fulcrum. The rear wheel gear cases 18 and 18 are supported in a freely rolling manner, and the rear wheels 11 and 11 are attached to a rear wheel axle that protrudes outward from the rear wheel gear cases 18 and 18.

  The engine 20 as a prime mover is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted from the engine output pulley 24 to the input shaft of the hydrostatic transmission (HST) 29 via the belt 21, The hydraulic pump is driven from this input shaft, and further transmitted from the output shaft of the hydrostatic transmission 29 to the mission in the mission case 12. The rotational power transmitted to the mission in the mission case 12 is shifted by the transmission in the case 12 and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final case (not shown) to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. . Further, the external take-out power is transmitted to the planting clutch case 25 provided at the rear portion of the traveling vehicle body 2 via the counter shaft 26 and is transmitted to the fertilizer application device 5 by a fertilizer transmission mechanism (not shown).

  The upper part of the engine 20 is covered with an engine cover 30, and a driver's seat 31 is installed thereon. A bonnet 32 incorporating various operation mechanisms is provided in front of the driver seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the bonnet 32. The left and right sides of the lower end of the engine cover 30 and the bonnet 32 are horizontal floor steps F.

The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip end of a swing arm 45 formed integrally with the upper link 40. The link 40 rotates up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.
The seedling planting unit 4 of the present embodiment has a four-row planting structure and includes a transmission case 50 that also serves as a frame. In addition, a pair of left and right drawing markers (not shown) for drawing the aircraft path in the next stroke to the topsoil surface is provided.

  A center float 14C is provided at the bottom of the seedling planting portion 4 and side floats 14R and 14L are provided at the left and right sides thereof. When the float 14 is in contact with the mud surface of the field, the aircraft is advanced. The float 14 slides while leveling the muddy surface, and seedlings are planted by the seedling planting device 13, which will be described later, on the leveling trace. Each float 14 is rotatably attached so that the front end side moves up and down according to the unevenness of the field topsoil surface. During planting work, the vertical movement of the front part of the center float 14C is an angle sensor (not shown). The planting depth of the seedling is always maintained constant by switching the hydraulic valve V (FIG. 2) that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4. To do. Further, engine power is transmitted from the planting clutch in the planting clutch case 25 to the planting transmission case 50 of the seedling planting unit 4 through the planting transmission shaft 28.

  The fertilizer applicator 5 includes a fertilizer feeding part (powder body feeding part) 61 provided with a plurality of fertilizers (powder bodies) stored in a fertilizer storage tank (powder body storage tank) 60 in the left-right direction of the traveling vehicle body 2. The fertilizer is fed out by a certain amount, and the fertilizer is guided to a fertilizer guide (not shown) attached to the left and right sides of the float 14 with a fertilizer hose (powder transfer hose) (not shown). It discharges in the fertilizer groove formed in the side part vicinity of each strip | strip by the provided groove-grower 64, .... Although not shown, the pressure air generated by the blower driven by the motor is blown into the fertilizer hose via the air chamber that is long in the left-right direction, and the fertilizer in the fertilizer hose is forced to the fertilizer outlet on the planting side To be transferred to.

  Further, in the support structure of the leveling rotors 27a and 27b, a beam member whose upper ends are rotatably supported by both side members of a rectangular support frame 39 composed of left and right support rods and both side members extending in the vertical direction. (Not shown), a support arm 35 fixed to both ends of the beam member, and a rotor support frame (not shown) rotatably attached to the support arm 35 (FIG. 1) are provided.

  A drive shaft (not shown) of the leveling rotor 27a is attached to the lower end of the rotor support frame. The rotor 27b in front of the center float 14 is arranged in front of the rotor 27a in front of the side float 14. A drive shaft (not shown) of the leveling rotor 27 a is attached to the lower end of the rotor support frame, and power from the rear wheel gear case 18 is transmitted to the drive shaft via the transmission shaft 78. Further, the rotor 27b disposed in front of the center float 14C having a lateral width is disposed in front of the rotor 27a in front of the floats 14R and 14L on both sides of the body, and the rotor 27b is disposed through a transmission case containing a transmission member. It is connected to the drive system.

The leveling rotors 27a and 27b can be moved up and down by a rotor vertical position adjusting lever 79 and a rotor vertical position adjusting lever sensor (not shown) that detects the operating position of the rotor vertical position adjusting lever 79.
As described above, the seedling planting unit 4 is mounted on the rear portion of the vehicle body so as to be movable up and down via the lifting link device 3, and is lifted and lowered by the expansion and contraction operation of the lifting hydraulic cylinder 46. A lifting hydraulic valve V (FIG. 2) for controlling the lifting hydraulic cylinder 46 is provided below the step floor F on the right side of the machine body.

  Further, the seedling planting section 4 has a mat seedling placed on each of the seedling mounting sections 6e provided on the left and right sides, and reciprocates left and right, and the seedling outlet 6b of the front plate 6a in each strip for each seedling. And a seedling tank 6 serving as a seedling stage for transferring seedlings downward by a seedling feeding belt 6c when a horizontal row of seedlings is supplied to the seedling outlet 6b, and a seedling planting tool whose tip operates in a closed loop locus A seedling planting device 13 for four strips is cut out at 22 and transplanted into the soil. The seedling tank 6 is partitioned for each mat seedling by a partition protrusion 6d.

  The hydrostatic transmission device 29 is configured to be driven by a front-rear direction operation of a transmission lever 29a provided on the side of the bonnet 32, and to control forward and backward movement of the machine body. The transmission lever 29a is moved forward. The forward travel speed becomes faster as the head is operated. Further, a stock change means for changing the operating cycle of the seedling planting tool 22 with respect to the traveling speed is provided, and the stock change is performed by operating the stock change lever 36 provided below the bonnet 32.

  The seedling planting section 4 has a four-row planting structure, a transmission case 50 that also serves as a frame, a seedling mounting section 6e that puts the seedlings and reciprocates left and right to feed the seedlings one by one to the seedling outlet 6b, ... , And the like, a seedling tank 6 having a seedling mounting portion 6e, and a seedling planting device 13 for planting seedlings supplied to the seedling outlet 6b,.

  The seedling planting section 4 is not shown in detail, but the seedling mounting section 6e,... Is slidable to the left and right by the power on the traveling vehicle body via the planting transmission shaft 28 (FIG. 1). The left and right reciprocating movements supply the seedling located at the lowest stage of the seedling mounting portion 6e to the seedling outlet 6b (FIG. 2), and plant the seedling in the field by the seedling planting device 13,. When the seedling placing part 6e moves to the end of the left and right stroke and all the seedlings in the lowermost stage are planted, the seedling feeding belt 6c is operated to transfer the seedling on the seedling placing part 6e downward by one stage. To do.

  The power transmitted to the seedling planting unit 4 by the planting transmission shaft 28 is transmitted into a planting transmission case 50 provided in the seedling planting unit 4, and the seedling planting device for each strip is transmitted from the planting transmission case 50. 13 and the seedling feeding belt 6c. A branching transmission part 50a is provided for branching the power in the planting transmission case 50 and transmitting to the seedling planting device 13 in units of every two strips, and the planting part for turning on and off the transmission of the branching transmission part 50a. A clutch 51 is provided, and power is transmitted from the planting partial clutch 51 to the branch transmission unit 50 a by the chain 178 (FIG. 3). It can be stopped every time.

  Since the planting partial clutch 51 that switches the operation and stop of the seedling planting device 13 in units of two adjacent ones is often operated to “cut” at the time of work at the shoreline, it is usually “ "is called. An interlocking mechanism that stops the seedling feeding belt 6c of the planting strip corresponding to the operation of the planting partial clutch 51 is also provided. Each hook clutch lever 52 for operating the planting partial clutch 51 is provided on the side of the driver's seat 31, and a hook clutch sensor (not shown) for detecting the operation position of the hook clutch lever 52 is provided. .

  Further, as shown in FIG. 3, the seedling feed drive cam 170 is always rotated by driving from the power in the planting transmission case 50 (FIG. 1), and the seedling feed drive cam 170 is moved at the left and right moving ends of the seedling mounting portion 6e. The seedling feeding arms 172 and 172 act on the seedling feeding arms 172 and 172 to drive the seedling feeding arms 172 and 172, and are transmitted to the left and right seedling feeding partial clutches 53 via the rotation shaft 174 and the left and right links 176 and 176, thereby The seedling feeding drive roller 220 is driven from 53, and the seedling feeding belt 6c is driven.

  4 shows a connecting portion between the planting partial clutch 51 and the planting cable 72 for operation thereof, and FIG. 5 shows a connecting portion between the seedling feeding belt 6c and the seedling feeding cable 73 for operation thereof. . The planting partial clutch 51 provided in the planting transmission case 50 includes a drive-side clutch body 206 fixed to the transmission shaft 13a of the seedling planting device 13, a clutch tooth 206a of the clutch body 206, and a clutch tooth that is detachable. A passive clutch body 207 having 207a is provided. The passive clutch body 207 is always urged toward the transmission shaft 13a by a spring 209, a sprocket 210, and a washer 211. It is in an operating state (a state where the planting cable 72 is pulled).

  A clutch pin groove 207b is provided on the side surface of the passive clutch body 207, and a hook clutch pin 213 connected to the tip of the planting cable 72 is detachably provided in the groove.畦 Clutch pin 213 is provided in the hole so as to penetrate the hole in the wall surface of planting transmission case 50, and can be protruded from the wall surface of planting transmission case 50 to the inside of planting transmission case 50 by spring 214. . Therefore, when the planting cable 72 is pulled, the hook clutch pin 213 is moved in the direction of being pulled out of the clutch pin groove 207b of the passive clutch body 207. When the hook pin 213 is pulled out in the clutch pin groove 207 b of the passive clutch body 207 by a predetermined pulling amount, the planting partial clutch 51 is “on” by the urging force of the spring 214. When the planting partial clutch 51 does not plant seedlings (planting partial clutch 51: “off”), the planting partial clutch 51 is a fixed position stop clutch. Becomes “ON”.

When the planting partial clutch 51 is disengaged, the planting cable 72 is loosened, so that the hook clutch pin 213 enters the clutch pin groove 207b by the urging of the compression spring 214, and in this state, the passive clutch body As the 207 rotates, the passive clutch body 207 gradually moves to the compression spring 209 side against the compression spring 209 by the guide of the clutch pin groove 207b, and the passive clutch body 207 has a predetermined rotational position (clutch). The clutch teeth 206a and 207a are disengaged for the first time in a state where the saddle clutch pin 213 is positioned at the rotational direction end of the pin groove 207b, and the passive clutch body 207 stops at a fixed position.
Note that the compression spring 214 is not contracted by the urging force of the compression spring 209 and the hook clutch pin 213 is not pushed back to the planting cable 72 side.
When the planting partial clutch 51 becomes “ON”, the chain 216 locked to the sprocket 210 is driven, and the seedling planting device 13 operates.

  FIG. 5 shows the configuration of the operating mechanism of the seedling feeding belt 6c. The seedling feeding cable 73 is connected to one end of an L-shaped shifter arm 219, and the other end of the shifter arm 219 is connected to the driving side clutch body 221 of the seedling feeding driving roller 220. The drive-side clutch body 221 is switched to “ON” and “OFF” in accordance with the movement of the “ON” and “OFF” sides of the valve, and constitutes a seedling feeding partial clutch 53. The drive side clutch body 221 can be engaged with and disengaged from the seedling feed roller 220 via the clutch teeth 220a and 221a, and the seedling feed drive roller 220 has an adjacent strip seedling feed drive on the opposite side of the drive side clutch body 221. It is connected via a clutch tooth that is always meshed with the roller 220. A seedling feed driven roller 223 is provided at a position parallel to the seedling feed drive roller 220, and a seedling feed belt 6 c is wound between the drive roller 220 and the driven roller 223.

  By operating the heel clutch lever 52, the passive side clutch body 207 of the planting partial clutch 51 can be switched between operation and non-operation, and the drive side clutch body 221 of the seedling feeding belt 6c is switched between operation and non-operation. Can do. That is, the planting cable 72 for operating the cocoon clutch can be moved to the cocoon clutch operating side, and at the same time, the seedling feeding cable 73 for activating the seedling feeding belt can be moved to the seedling feeding belt operating side. The planting cable 72 can be moved to the heel clutch non-operating side, and at the same time, the seedling feeding cable 73 for operating the seedling feeding belt can be moved to the seedling feeding belt non-operating side. As described above, the seedling planting device 13 and the seedling feeding belt 6c can be operated simultaneously by operating the hook clutch levers 52, and can also be deactivated at the same time.

  FIG. 6 shows a front view of the cable unit (saddle clutch unit) 62 of the four-row planted rice transplanter shown in FIG. 7A to 7C are simplified diagrams showing the movements of the arms 80a and 80b and the cam 75 in FIG. 6 in an easily understandable manner. FIG. 7A shows a state when the cam 75 rotates 90 degrees in the arrow B direction from the state of FIG. 6, and FIG. 7B shows the cam 75 in the arrow B direction from the state of FIG. FIG. 7C shows a state when the cam 75 is rotated 180 degrees in the arrow B direction from the state shown in FIG.

  As described above, each planting partial clutch 51 can be manually operated by each heel clutch lever 52, but each planting partial clutch 51 and each seedling feeding can be automatically operated without operating the heel clutch lever 52. As a configuration in which the partial clutch 53 can be turned on and off, a cable unit 62 in which cables of each clutch (planting partial clutch 51 and seedling feeding partial clutch 53) are routed may be provided. The cable in the cable unit 62 may be operated based on manual operation of the hook clutch lever 52.

  In the four-row planted rice transplanter shown in FIG. 6, the first seedling feeding cable (first and second seedling feeding cable) 73a for operating the seedling feeding belt 6c, the second seedling feeding A cable (a seedling feeding cable for the third and fourth strips) 73b, a first seedling planting cable (a seedling planting cable for the first and second strips) 72a for operating the seedling planting device 13, and a second seedling A cable unit 62 in which a planting cable (a seedling planting cable for the third and fourth strips) 72 b is routed is provided on the back surface of the seedling tank 6. The first seedling planting cable 72a and the second seedling planting cable 72b are for the planting partial clutch 51 (FIGS. 3 and 4), and the first seedling feeding cable 73a and the second seedling feeding cable 73b are the seedlings. The partial clutch 53 is connected to the feed partial clutch 53 (FIGS. 3 and 5), and the planting partial clutch 51 is engaged or disengaged by the operation of the first seedling planting cable 72a and the second seedling planting cable 72b. Thus, the seedling feeding partial clutch 53 is turned on or off by the operation of the first seedling feeding cable 73a and the second seedling feeding cable 73b. The operations of the first seedling planting cable 72a, the second seedling planting cable 72b, the first seedling feeding cable 73a, and the second seedling feeding cable 73b are electric. The cable unit 62 is also referred to as a saddle clutch unit 62.

  And according to the rice transplanter of this embodiment, the operation | movement cable (seedling planting cable) of the seedling planting apparatus 13 for every 2 strips in the saddle clutch unit 62 and the seedling feeding belt 6c of the planting strip corresponding to it 72, the seedling feeding cable 73), the first seedling planting cable 72a, the second seedling planting cable 72b, the first seedling feeding cable 73a, and the second seedling feeding cable 73b are both the same in the longitudinal direction. Since it is aligned on a straight line so as to be in the direction, both cables are routed so as to move on two substantially parallel straight lines.

  As shown in FIG. 6, the saddle clutch unit 62 is provided with a motor 70 supported by a support plate 65 and a gear 71 that meshes with a gear 70 a provided on a rotation shaft portion of the motor 70. An eccentric cam 75 having a small diameter portion and a large diameter portion is fixedly connected to the rotary shaft 71a. When the motor 70 is driven and, for example, the gear 70a provided on the rotating shaft portion of the motor 70 rotates in the direction of arrow A, the gear 71 meshing with the gear 70a rotates in the direction of arrow B, thereby rotating the rotating shaft 71a of the gear 71. Similarly, the cam 75 fixed to the head rotates in the direction of arrow B.

  An angle sensor 83 is provided on the rotating shaft 71a of the cam 75 (the rotating shaft of the gear 71), the rotation angle of the cam 75 is detected by the angle sensor 83, and seedling planting for operating the seedling planting device 13 is performed. A first operating arm 80a (right arm in the drawing) which is a pair of left and right first and second limb arms L-shaped in front view connected to a cable 72 and a seedling feeding cable 73 for operating the seedling feeding belt 6c; The rollers 81, 81 provided at the end of the base side of the second operation arm 80 b (the left arm in the drawing) that is the third and fourth strip arms are arranged so that the side surfaces of the cam 75 are in contact with each other. Further, a first seedling planting cable 72a, which is a seedling planting cable for operating the seedling planting device 13, is provided at the distal ends of the two pairs of left and right first operating arms 80a and second operating arms 80b. The first seedling feeding cable 73a and the second seedling feeding cable 73b, which are seedling feeding cables for operating the seedling feeding belt 6c, are connected to each other.

  The distal end of the first and second first seedling planting cables 72a and the outer cable 73A of the first and second first seedling feeding cable 73a are connected to the distal end of the first operating arm 80a. The other end portions (not shown) of the first seedling planting cable 72a and the first seedling feeding cable 73a are planted partial clutches 51 (FIGS. 3 and 4) and seedling feeding partial clutches, respectively. 53 (FIGS. 3 and 5). Further, the outer cable 72A of the first seedling planting cable 72a in the first and second articles is fixed to the airframe.

  Similarly, the distal end portion of the third and fourth second seedling planting cable 72b and the outer cable 73B of the second and third seedling feeding cable 73b are connected to the distal end portion of the second operating arm 80b. The other end portions (not shown) of the second seedling planting cable 72b and the second seedling feeding cable 73b are the operation members of the planting partial clutch 51 and the seedling feeding partial clutch 53, respectively. It is connected to. Moreover, the outer cable 72B of the 2nd seedling planting cable 72b of the 3rd and 4th article is being fixed to the body. Table 1 shows the relationship between the operation of the seedling planting cables 72a and 72b and the seedling feeding cables 73a and 73b and the on / off state of the planting partial clutch 51 and the seedling feeding partial clutch 53.

  At the positions of the first operation arm 80a and the second operation arm 80b in FIG. 6, the first and second first seedling planting cables 72a and 72b and the third and fourth second seedling planting cables 72b are provided. In the state of being pulled together, the partial clutch 51 for planting of each strip is engaged, and the seedling planting device 13 operates. At this time, the outer cable 73A of the first seedling feeding cable 73a of the first and second articles 73A and the outer cable 73B of the second seedling feeding cable 73b of the third and fourth articles are the first inner cables. , 2 first seedling feeding cable 73a and 3rd and 4th second seedling feeding cable 73b are loosened, and 1st, 2nd and 3rd, 4th seedling feeding partial clutch 53 The seedling feeding belt 6c of the first, second and third and fourth articles is driven. The positions of the first operation arm 80a and the second operation arm 80b at this time are referred to as X1 and X2 positions, respectively. In addition, the 1st seedling feeding cable 73a of 1st and 2nd and the 2nd seedling feeding cable 73b of 3rd and 4th are relatively with respect to the moving outer cable (outer cable 73A and outer cable 73B). It will move.

  And, in this way, when the partial clutch 51 for planting of each line is turned on, it is when the first seedling planting cable 72a and the second seedling planting cable 72b which are inner cables are drawn, When the seedling feeding partial clutch 53 of each line is engaged, the first seedling feeding cable 73a and the second seedling feeding cable 73b, which are inner cables, are in a loose state. The first seedling planting cable 72a, the second seedling planting cable 72b, the outer cable 72A of the first seedling planting cable 72a, the outer cable 72B of the second seedling planting cable 72b, and the first The seedling feeding cable 73a, the second seedling feeding cable 73b, the outer cable 73A of the first seedling feeding cable 73a, the outer cable 73B of the second seedling feeding cable 73b, etc. are the first operating arm 80a, the second In the vicinity of the operation arm 80b, they are arranged so that their longitudinal directions are the same. Then, as shown in FIG. 6, the cables 72 and 73 are routed so as to operate in the vertical direction in each strip (for example, in FIG. 6, so as to be substantially straight in the vertical direction). Yes.

  When the cam 75 is rotated 90 degrees from the position of FIG. 6 in the direction of arrow B by the rotation of the motor 70, the roller 81 of the first operating arm 80a in contact with the cam 75 is moved from the outer periphery of the large diameter portion of the cam 75 to the small diameter portion. It will be in contact with the outer periphery. Accordingly, the roller 81 moves in the direction of the arrow Ca, and the first operating arm 80a to which the first and second first seedling planting cables 72a and the first and second first seedling feeding cables 73a are connected. Rotates around the fulcrum 82a supported by the support plate 65, and the tip of the first operating arm 80a moves in the direction of the arrow Da to move to the position shown in FIG. The position of the first operation arm 80a at this time is referred to as a Y1 position.

  As the first operating arm 80a moves in the direction of the arrow Da, the outer cable 73A of the first and second first seedling feeding cables 73a connected to the tip of the first operating arm 80a is operated in the first direction. The first seedling feeding cable 73a of the first and second articles is pulled together with the arm 80a, and the first seedling planting cable 72a of the first and second articles is actuated in the direction of the arrow Da to loosen each clutch. Becomes non-transmission state. That is, when the first and second first seedling planting cables 72a operate in the direction of the arrow Da, the first and second planting partial clutches 51 are turned off, and the seedling planting device 13 operates. do not do. Further, when the outer cable 73A of the first and second first seedling feeding cables 73a moves in the direction of the arrow Da together with the first operating arm 80a, the first and second first seedling feeding cables 73a are pulled. Accordingly, the first and second seedling feeding partial clutch 53 is disengaged, and the first and second seedling feeding belt 6c is not driven.

  On the other hand, even if the cam 75 rotates 90 degrees in the direction of arrow B from the position shown in FIG. 6, the roller 81 of the second operating arm 80 b that is in contact with the cam 75 remains in contact with the outer periphery of the large diameter portion of the cam 75. Therefore, the second operation arm 80b to which the third and fourth second seedling planting cables 72b and the third and fourth second seedling feeding cable 73b are connected is located at the position (X2 in FIG. 6). Since the second seedling planting cable 72b is not activated, the seedling planting device 13 operates with the third and fourth planting partial clutches 51 being engaged. In addition, the third and fourth seedling feeding cables 73b are also inactive, the third and fourth seedling feeding partial clutch 53 remains on, and the third and fourth seedling feeding belts 6c are To drive.

When the cam 75 further rotates 90 degrees in the direction of arrow B (rotates 180 degrees in the direction of arrow B from the position shown in FIG. 6), the first operation arm 80a and the second operation arm 80b are shown in FIG. 7B. It will be in the state.
At this time, since the roller 81 of the first operating arm 80a that is in contact with the cam 75 remains in contact with the outer periphery of the small diameter portion of the cam 75, the first and second first seedling planting cables 72a and Since the first operating arm 80a to which the two first seedling feed cables 73a are connected remains the same as in FIG. 7A (Y1 position), the first and second partial planting clutches 51 remains cut and the seedling planting device 13 does not operate. Further, the first and second seedling feeding partial clutch 53 remains off, and the first and second seedling feeding belt 6c is not driven.

  On the other hand, the roller 81 of the second operating arm 80b comes into contact with the outer periphery of the small diameter portion from the outer periphery of the large diameter portion of the cam 75. Accordingly, the roller 81 moves in the direction of the arrow Cb (FIG. 6), and the second and third seedling planting cables 72b and the second and third seedling feeding cables 73b are connected to each other. The operating arm 80b rotates about the fulcrum portion 82b supported by the support plate 65, and the tip of the second operating arm 80b moves in the direction of arrow Db to the position shown in FIG. 7B. To do. The position of the second operation arm 80b at this time is referred to as a Y2 position.

  When the second operation arm 80b moves in the direction of the arrow Db, the outer cable 73B of the third and fourth second seedling feed cables 73b connected to the tip of the second operation arm 80b is operated in the second operation. The third and fourth second seedling feeding cable 73b is pulled together with the arm 80b, and the third and fourth second seedling planting cable 72b is actuated in the direction of the arrow Db. It becomes a transmission state. That is, when the third and fourth second seedling planting cables 72b are operated in the direction of the arrow Db, the third and fourth planting partial clutch 51 is turned off and the seedling planting device 13 is operated. do not do. The outer cable 73B of the second seedling feeding cable 73b of the third and fourth articles moves in the direction of the arrow Db together with the second operating arm 80b, so that the second seedling feeding cable 73b of the third and fourth articles is pulled. Accordingly, the third and fourth seedling feeding partial clutch 53 is disengaged, and the third and fourth seedling feeding belt 6c is not driven.

When the cam 75 further rotates 90 degrees in the direction of arrow B (rotates 270 degrees in the direction of arrow B from the position shown in FIG. 6), the first operation arm 80a and the second operation arm 80b are shown in FIG. 7C. It will be in the state.
At this time, the roller 81 of the first operating arm 80 a that is in contact with the cam 75 comes into contact with the outer periphery of the large diameter portion from the outer periphery of the small diameter portion of the cam 75. Accordingly, the roller 81 moves in the direction opposite to the arrow Ca direction, and the first and second first seedling planting cables 72a and the first and second first seedling feeding cables 73a are connected. One operating arm 80a rotates about a fulcrum portion 82a supported by the support plate 65, and the tip of the first operating arm 80a moves in the direction opposite to the arrow Da direction, and FIG. The position of the first operating arm 80a returns to the X1 position.

When the first operating arm 80a is in the X1 position, the first and second first seedling planting cables 72a are pulled as described above, that is, the planting partial clutch 51 of each strip is engaged. Therefore, the seedling planting device 13 operates. Further, the first seedling feeding cable 73a is loosened, the first and second seedling feeding partial clutches 53 are engaged, and the first and second seedling feeding belt 6c is driven.
On the other hand, since the roller 81 of the second operating arm 80b in contact with the cam 75 remains in contact with the outer periphery of the small diameter portion of the cam 75, the second seedling planting cable 72b and the third and fourth third and fourth cables Since the second operating arm 80b to which the second seedling feeding cable 73b of the strip is connected remains unchanged (Y2 position) in FIG. 7B, the partial clutch 51 for planting the third and fourth strips. The seedling planting device 13 does not operate. Further, the third and fourth seedling feeding partial clutch 53 remains off, and the third and fourth seedling feeding belt 6c is not driven.

  When the cam 75 further rotates 90 degrees in the direction of arrow B (from the position of FIG. 6 to 360 degrees in the direction of arrow B), the first operating arms 80a and 80b return to the state of FIG. 6, that is, the X1 position. The first seedling planting cable 72a of the first and second articles and the second seedling planting cable 72b of the third and fourth articles are pulled together to engage the partial clutch 51 for planting each article, The attaching device 13 operates. The first seedling feeding cable 73a of the first and second articles and the second seedling feeding cable 73b of the third and fourth articles are also loosened, and the first, second and third and fourth seedling feeding partial clutches 53 enters, and the seedling feeding belt 6c of the first, second and third and fourth articles is driven.

Thus, when both arms 80a and 80b are in the X1 and X2 positions, the first, second and third and fourth seedling feeding partial clutches 53 are joined together, and the first, second and third and fourth articles. The seedling feeding belt 6c is driven, the first, second and third and fourth planting partial clutches 51 are also engaged, and the seedling planting device 13 is also operated (state of FIG. 6).
When the first operating arm 80a is in the Y1 position and the second operating arm 80b is in the X2 position, the first and second seedling feeding partial clutch 53 is disengaged, and the first and second seedling feeding belt 6c. Is not driven, the first and second planting partial clutches 51 are also turned off and the seedling planting device 13 does not operate, but the third and fourth seedling feeding partial clutches 53 remain engaged. Therefore, the 3rd and 4th seedling feeding belt 6c is driven, the 3rd and 4th seedling partial clutch 51 is also engaged, and the seedling planting device 13 is also operated (state shown in FIG. 7A).

When both arms 80a and 80b are in the Y1 and Y2 positions, the first, second and third and fourth seedling feeding partial clutches 53 are both disconnected, and the first, second and third and fourth seedlings are cut off. The feed belt 6c is not driven, and the first, second, and third and fourth planting partial clutches 51 are turned off, and the seedling planting device 13 does not operate (state of FIG. 7B).
When the first operating arm 80a is in the X1 position and the second operating arm 80b is in the Y2 position, the third and fourth seedling feeding partial clutch 53 is disengaged and the third and fourth seedling feeding belt 6c. Is not driven, the third and fourth planting partial clutch 51 is also turned off and the seedling planting device 13 is not operated, but the first and second seedling feeding partial clutch 53 is engaged and the first and first The two seedling feeding belts 6c are driven, and the first and second planting partial clutches 51 are also engaged to operate the seedling planting device 13 (state shown in FIG. 7C).

As described above, the cables 72 and 73 have such four types of operation modes by the saddle clutch unit 62 shown in FIG.
By adopting this configuration, the first seedling feeding cable 73a for operating the seedling feeding belt 6c, the second seedling feeding cable 73b and the first seedling feeding device 13 for operating the seedling planting device 13 are provided in the heel clutch unit 62. Arrange the first seedling planting cable 72a, the second seedling planting cable 72b, etc. so that their longitudinal directions are the same direction, and place them on substantially parallel straight lines (two straight lines in the illustrated example). Since the cables are arranged so as to move, the arrangement of cables is not complicated and simplified. In addition, since the cables can be easily routed in this way, the rice transplanter itself has a simple configuration, and the cables do not get in the way during maintenance such as repair and attachment / detachment of the paddle clutch unit 62. Excellent maintainability.

  Next, an 8-row riding type rice transplanter will be described. According to the four-row planted rice transplanter shown in FIG. 1, the planting partial clutch 51 is provided for every two strips (two in total). In the 8-row riding type rice transplanter, the planting partial clutch 51 itself is the same as the 4-row planting riding type rice transplanter, but there are four planting partial clutches 51. Even in the case of an 8-row riding type rice transplanter, the first seedling planting cable 72a, the second seedling planting cable 72b, and the seedling feeding belt 6c for operating the seedling planting device 13 are used. The first seedling feeding cable 73a, the second seedling feeding cable 73b, and the like are routed so that their longitudinal directions are the same, and are routed so as to move on substantially parallel (for example, two) straight lines. Needless to say, the same operational effects as in the case of a four-row riding type rice transplanter can be obtained. In this case, the left four strips may be controlled by the left hook clutch unit 62 and the right four bars may be controlled by the right hook clutch unit 62.

FIG. 8A shows a front sectional view (simplified view) of the seedling tank 6, and FIG. 8B shows a view seen from the back side of the seedling tank 6.
When a fixed extension seedling tank 96 is provided for each strip at the top of the seedling tank 6, and the extension seedling tank 96 is foldable, the electric hook clutch unit 62 (same as shown in FIG. 6). It is good to arrange so that it protrudes to the left and right outside of the extended seedling tank 96.

Some recent seedling transplanters have a fixed extension seedling tank 96 provided above the seedling tank 6 so that many seedlings can be placed on the seedling tank 6. In addition, there is a type in which the seedling tank 6 is also widened so that the right and left outer seedling mounting portions 6e are folded inward by a partition protrusion 6d (Z in FIG. 8B) during storage. That is, the seedling placement part 6e is provided on each of the left and right sides of the seedling tank 6 at the time of storage, and the seedling placement part 6e is further provided thereon.
The extended seedling tank 96 is also folded inward so that the extended seedling tank 96 does not get in the way because of the space in the storage place of the seedling transplanter.

For example, as shown in FIG. 8 (a), the extended seedling tanks 96 at both left and right ends rotate in the direction of arrow E around the fulcrum 96a and are stored inside. In this state (a state where the extended seedling tank 96 is folded), the electric heel clutch unit 62 is disposed so as to be outside the left end or the right end of the extended seedling tank 96. Further, by folding the right and left outer seedling mounting portions 6e inward by the partition protrusions 6d, the back surface of the heel clutch unit 62 is also opened.
By adopting this configuration, when the heel clutch unit 62 is maintained, the extended seedling tank 96 and the seedling mounting portion 6e are not obstructed, and work can be performed from above the seedling tank 6 or from the rear side of the machine body. Will improve.

FIG. 9 shows another example (reference example) of the saddle clutch unit 62, and shows a perspective view of the servo motor when the servo motor 90 is used as the motor.
Further, the number of windings of the actuating wires 91, 92, 93, 94 of the respective strips on the motor in the saddle clutch unit 62 (which is different from that shown in FIG. 6) is changed with respect to the rotating shaft of the motor. (The phase is shifted), and the servo motor 90 capable of controlling the rotation speed of the rotation shaft of the motor may be used.
That is, the wires 91, 92, 93, 94 are sequentially pulled and actuated in accordance with the number of rotations of the rotating shaft 90a of the servo motor 90, so that the planting partial clutch 51 of each strip is disengaged. In addition, what is necessary is just to arrange | position the wire (not shown) of the seedling feeding partial clutch 53 so that the pullback of the wire of the planting partial clutch 51 is reversed.

And, for example, the first and second wire 91 of the planting partial clutch 51 for turning on and off the transmission of the first and second branch transmission portions 50a has a winding number of +3 rotations and the third and fourth branches. The third and fourth strip wires 92 of the planting partial clutch 51 for turning on and off the transmission of the transmission portion 50a have a winding number of +1 rotation, and turn on and off the transmission of the fifth and sixth branch transmission portions 50a. The fifth and sixth wires 93 of the planting partial clutch 51 have a winding number of −1 rotation, and the seventh and eighth branching clutches 51 for turning on and off the transmission of the seventh and eighth branch transmission portions 50a. The eight wires 94 are wound around the motor rotating shaft 90a with a winding number of -3. Then, when the motor rotating shaft 90a of the motor 90 rotates four or more times, the planting partial clutch 51 of all the strips is disengaged.
Table 1 shows the number of rotations of the motor 90 and the wire that operates.

  When the motor 90 is rotating forward (in the direction of the arrow G) (left side of Table 1), if the motor 90 has a rotation speed n of 0 or more and less than 1, the number of wires to operate is zero, and the rotation speed n of the motor 90 is 1 or more and 3 Is less than 4 (3 + 1 = 4) rotations and the partial clutch 51 for planting 51 is disengaged. When the rotation speed n of the motor 90 is 3 or more and less than 5, the third and fourth wires 92 in addition to the first and second wires 91 are operated at 4 (1 + 3 = 4) rotations or more to operate, The two partial planting clutches 51 and the third and fourth partial planting clutches 51 are disengaged. When the rotation speed n of the motor 90 is 5 or more and less than 7, in addition to the first and second wires 91 and the third and fourth wires 92, the fifth and sixth wires 93 are 4 (-1 + 5 = 4). By operating more than the rotation, the first and second stripping partial clutches 51, the third and fourth stripping partial clutches 51, and the fifth and sixth stripping partial clutches 51 are disengaged. And if the rotation speed n of the motor 90 becomes 7 or more, the 7th and 8th wires 94 also become 4 (−3 + 7 = 4) rotations or more, and all the wires 91, 92, 93, 94 are activated by operation. And all the planting partial clutches 51 are disengaged.

  On the other hand, when the motor 90 is rotating in the reverse direction (the direction opposite to the direction of the arrow G) (the right side of Table 1), when the rotation speed n of the motor 90 is greater than -1 and equal to or less than 0, the number of wires to operate is zero. When the rotational speed n of the motor 90 exceeds -3 and is -1 or less, the seventh and eighth wires 94 are operated at 4 (-3-1 = -4) rotations or more on the opposite side, and operate. The partial clutch 51 for planting enters. When the rotational speed n of the motor 90 exceeds −5 and is −3 or less, the fifth and sixth wires 93 are 4 (−1−3 = −4) on the opposite side in addition to the seventh and eighth wires 94. ) The operation becomes more than the rotation, and the seventh and eighth planting partial clutches 51 and the fifth and sixth planting partial clutches 51 are engaged. When the rotation speed n of the motor 90 is more than -7 and less than -5, in addition to the seventh and eighth wires 94 and the fifth and sixth wires 93, the third and fourth wires 92 are arranged on the opposite side. By operating at 4 (+ 1-5 = -4) rotations or more, the 7th and 8th planting partial clutch 51, the 5th and 6th planting partial clutch 51, and the 3rd and 4th planting. The attached partial clutch 51 is engaged. When the rotational speed n of the motor 90 is -7 or less, the first and second wires 91 are also rotated more than 4 (+ 3-7 = -4) on the opposite side, and all the wires 91 are activated by operating. , 92, 93, 94 are activated, and all the planting partial clutches 51 are engaged.

In this way, with the simple configuration without the operation arm 80 as shown in FIG. 6, the wires 91, 92, 93, 94 are automatically operated for the purpose of planting each strip without manual operation. Since the partial clutch 51 can be turned on and off in sequence, the efficiency of planting work is improved.
The operation of the wires 91, 92, 93, 94 according to the number of rotations of the motor 90 can be easily adjusted by changing the diameter of the motor shaft 70a or changing the length of the wires 91, 92, 93, 94. it can.

FIG. 10A shows a plan view of the hardness sensor 100 for measuring the hardness of the field, and FIG. 10B shows a side view of the hardness sensor 100 of FIG. The hard / soft sensor 100 is disposed between the front leveling rotor 27b and the rear leveling rotor 27a (near W in FIG. 1).
As shown in FIG. 10, on the other end of the support arm 109, one end of which is connected to the drive shaft of the leveling rotor 27a, the tip of the arm 107 is supported so as to be swingable up and down via the rotation shaft 109a. The other end of the arm 107 is rotatably connected to a rotating shaft 101a of a drum-like rotating body 101 having a grounding surface having a predetermined lateral width. The two rotating bodies 101 and 101 rotate integrally on the same axis of the rotating shaft 101a. A rotation speed detection sensor 105 that detects the rotation speed of the rotating body 101 is provided on the rotation shaft 101a.

The rotating body 101 tries to enter the field topsoil surface by its own weight while rotating.
Then, when the rotation speed detection sensor 105 detects that the rotating body 101 does not rotate, it is determined that the field is hard. If the field is hard, the topsoil is sticky and mud adheres to the rotating body 101, making it difficult to rotate. On the other hand, if the farm field is soft, the topsoil is not sticky and mud hardly adheres to the rotating body 101, so that there is little influence on the rotation.

  By using the rotation of the rotating body 101 to configure the hardness / soft sensor 100 by the rotation speed detection sensor 105, the rotation speed of the rotation body 101 is measured by the rotation speed detection sensor 105, and the hardness of the field can be easily increased. It can be measured. Therefore, planting work according to the hardness of the field is possible, and work efficiency is improved. For example, when it is determined that the field is hard, the control sensitivity of the lifting control of the seedling planting unit 4 is set insensitive. Moreover, when it is judged that a farm field is soft, the control sensitivity of the raising / lowering control of the seedling planting part 4 is set sensitively.

  Then, as shown in FIG. 10 (b), a load measuring sensor 103 for measuring the load applied between the arm 107 and the support arm 109 is provided between the arm 107 and the support arm 109. The load applied between the arm 107 and the support arm 109 when the attaching portion 4 is raised is measured to determine the degree of mud attachment. When mud adheres to the rotating body 101, the rotating body 101 becomes heavier and sinks and dives into the soil. Then, if it is submerged in the soil, the rotating body 101 becomes difficult to rotate, and in this case, it is determined that it is hard. Thus, since it is judged to be harder than the original field hardness, an appropriate hardness cannot be detected. On the other hand, this structure performs the correction control for detecting the hardness of soil appropriately by providing the load measurement sensor 103. That is, when mud adheres and the load becomes heavy, the correction is made softly.

  By measuring the load applied to the link mechanism between the arm 107 and the support arm 109 when the seedling planting part 4 is raised, and determining the degree of mud attachment, the detection value of the hardness / softness sensor 100 (rotation speed detection sensor 105) is corrected. Specifically, when the measurement value of the load measurement sensor 103 is large (when the load is heavy), the measurement can be accurately performed by correcting the sensor value of the hardness sensor 100 slightly softly according to the measurement value. It becomes like this.

Further, FIG. 11A shows a simplified plan view of a hard / soft sensor 120 of another example of the hard / soft sensor 100 using the rotating body 101 shown in FIG. 10, and FIG. ) Shows a simplified side view.
As a soft / soft sensor 120 of another example of the rotary soft / soft sensor 100 using the rotating body 101 and the rotational speed detection sensor 105 shown in FIG. 10, as shown in FIG. Alternatively, it may be a U-shape), and may be a V-shaped soft / soft sensor 120 including springs 120a and 120a having a plate-like flat portion in a side view. Note that the rod 120b of the V-shaped protrusion (the connecting portion of the springs 120a and 120a) is connected to a transmission case (not shown) of the leveling rotor 27b.

The V-shaped hardness / softness sensor 120 shown in FIG. 11 has a spring shape as a whole, and the left and right springs 120a and 120a bend (close) inward with the rod body 120b as a fulcrum when pressed from the outside in the left and right direction by mud in a farm scene. In this configuration, the hardness of the field is measured by the closing force (force applied to the springs 120a and 120a).
When the force applied to the springs 120a and 120a is detected and measured by an angle sensor (not shown) provided on the rod body 120b, and the force applied to the springs 120a and 120a is large, the field is hard and is applied to the springs 120a and 120a. If the force is small, the field is judged to be soft.
If the springs 120a and 120a of the hardness sensor 120 do not close inward even if the traveling speed of the rice transplanter is increased, the traveling speed may be controlled to automatically decrease.

  A vehicle speed sensor (not shown) for measuring the traveling speed of the rice transplanter is provided in the transmission shaft 11a portion to the rear wheel 11, and when the vehicle speed is more than a certain value from the detection value by the vehicle speed sensor, the spring 120a of the hard / soft sensor 120, Control that controls that the traveling speed of the rice transplanter is slower than the current traveling speed when it is determined that 120a does not close inward, that is, the force applied to the springs 120a and 120a is small from the detection value of the hardness sensor 120 A device (not shown) is provided.

If the softness sensor 120 does not close inside when the traveling speed of the rice transplanter is high, the soil is too soft and mud pushing by the float 14 or the like becomes intense.
Therefore, by adopting this configuration, when the traveling speed of the rice transplanter is high, mud pushing by the float 14 or the like can be suppressed by reducing the traveling speed when the hardness sensor 120 does not close inward.

FIG. 12 shows a simplified side view when the float sensor 130 is provided behind the center float 14C of FIG.
As described above, each of the floats 14C, 14L, and 14R is rotatably attached to the machine body by the connecting portion 129 so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the center float 14C during planting work. Is detected by an angle-of-attack sensor (not shown). At the time of planting work, the seedling planting depth is always adjusted by switching the hydraulic valve V (FIG. 2) that controls the lifting hydraulic cylinder 46 according to the detection result of the angle-of-attack sensor to raise and lower the seedling planting unit 4. Keep constant. In addition to the vertical movement detection mechanism, a float sensor 130 is provided behind the center float 14C. When the float sensor 130 senses unevenness on the surface of the field, the control for desensitizing the vertical movement detection mechanism is performed. A control device (not shown) is provided. That is, the float sensor 130 is for correcting the sensitivity of the vertical movement detection mechanism.

As shown in FIG. 12, the float sensor 130 can be easily configured by attaching a potentiometer 130a to the rear part of the center float 14C and connecting the potentiometer 130a and the front end part of the small float 130b behind the center float 14C.
When the field topsoil surface is uneven, if the sensitivity of the float sensor 130 is sensitive, it may react more than necessary and hinder planting work. For example, planting depth may become inappropriate due to hunting for raising and lowering the seedling planting unit 4.
Therefore, by adopting this configuration, the raising / lowering control of the seedling planting unit 4 is stable and the planting depth is appropriate, so that an appropriate planting operation can be performed.

FIG. 13 shows a side view of a hard / soft sensor 140 of another example of the hard / soft sensor 100 using the rotating body 101 shown in FIG.
The center float 14C may be provided with both the hardness / soft sensor 140b formed of a rotation sensor using a rotating body and the hardness / soft sensor 140a including only a potentiometer 141 not using a rotating body.
As shown in FIG. 13, a plurality of potentiometers 141, 141 are provided in the front-rear direction of the upper surface of the center float 14C, one potentiometer 141 is left as it is, and a rotating body 142 is provided on the other potentiometer 141, so that a plurality of different types are provided. The soft / soft sensor 140 may be a sensor.

The hardness of the field is measured based on the detection value from the hardness / softness sensor 140 having such a configuration, and it is determined whether the soil is hard sand or soft mud, and is lifted / lowered by a control device (not shown). The hydraulic pressure sensitivity of the hydraulic cylinder 46 is corrected. For example, it is determined that the hardness is determined by the hardness / softness sensor 140a that does not depend on the rotating body, and when the rotational speed is large by the hardness / softness sensor 140b formed of the rotation sensor, it is determined that the sand is harder. Further, it is determined that the hardness is determined by the hardness / softness sensor 140a that does not depend on the rotating body, and it is determined that the mud is hard when the rotational speed is low with the rotation sensor 140b.
In the case of a hard sandy material, mud pushing increases as compared with a hard mud material, and therefore the hydraulic sensitivity of the elevating hydraulic cylinder 46 is made more sensitive than in a hard mud material. On the other hand, when the soil is soft, the sensitivity is set regardless of the sandy or mud quality.

The planting depth of the seedling is always maintained constant by switching the hydraulic valve V that controls the lifting hydraulic cylinder 46 according to the detection result of the hardness / softness sensor 140 to raise and lower the seedling planting unit 4. With the above-described configuration, by making the hydraulic sensitivity optimal for the field, accurate mud pushing can be performed by precise control, and stable elevation control can be performed.
Furthermore, since the lifting hydraulic cylinder 46 suitable for the field can be controlled, the seedling planting depth by raising and lowering the seedling planting unit 4 can be always maintained constant.

FIG. 14A shows a plan view of a soft / soft sensor (width sensor) 150 as another example of the hard / soft sensor 100 using the rotating body 101 shown in FIG. 10, and FIG. The side view of a) is shown. In FIG. 14A, the connection between the groove generator 64 and the width sensor 150 is not shown.
Moreover, it is good also as a structure which measures the hardness of a field by providing the apparatus which measures that the groove | channel formed with the groover 64 is buried behind the groover 64 of the rice transplanter shown in FIG.

  As shown in FIG. 14 (a), a width having a width B, which is U-shaped (may be V-shaped) in plan view and slightly narrower than the lateral width A of the groover 64, behind the groover 64. The sensor 150 is connected. As shown in FIG. 11, the width sensor 150 has a U-shaped projection (or may be V-shaped) in front as viewed in a plan view, and has springs 150a and 150a having plate-shaped planar portions in a side view. Consists of. Then, as shown in FIG. 14B, the front end of the groover 64 is connected to one end of the side view bifurcated support arm 151 connected to the machine body side, and the width sensor 150 is connected to the other end of the bifurcated support arm 151. Are connected. The width sensor 150 is connected to the bifurcated support arm 151 via a rod body 152 provided on a U-shaped protrusion.

  The groove formed by the groove generator 64 is gradually filled, but by measuring the groove width after groove formation by the width sensor 150, it can be understood how much the groove is filled. Since the width sensor 150 is also spring-like like the soft / soft sensor 120 in FIG. 11, the left and right springs 150 a and 150 a are inwardly centered on the rod body 152 by being pushed from the left and right directions by mud in a farm scene. It is configured to bend (close), and to measure the hardness of the field by its closing force (force applied to the springs 150a and 150a). The force applied to the springs 150a and 150a is detected and measured by an angle sensor (not shown) provided on the rod body 152 portion.

For example, when the width sensor 150 detects that the width is wide, that is, when there is almost no mud return (groove filling), the field is determined to be hard and the width sensor 150 detects that the width is narrow. That is, when the mud returns quickly (groove filling), it is determined that the field is soft.
Therefore, by adopting this configuration, by measuring the width of the groove formed by the grooving device 64 by the width sensor 150, the degree of mud return can be understood, and the field hardness can be measured with a simple configuration.
The soft / soft sensor 150 shown in FIG. 14 cuts the groove first, and determines the softness / softness of the soil based on the amount of soil returned to the groove. The soft / soft sensor 120 shown in FIG. Is different in that respect.

Further, when it is determined that the return of mud is slow from the detection value by the width sensor 150, a control device (not shown) for automatically controlling the traveling speed of the rice transplanter to be slow may be provided. . When the mud returns slowly, it is judged that the field is hard. Therefore, if the traveling speed of the rice transplanter is high, the seedling planting part 4 is floating and the floating seedlings are likely to be generated. Moreover, there is no time for the mud to return, and floating seedlings are likely to occur. The floating seedling is a phenomenon in which seedlings are floated from the field scene due to insufficient seedling planting.
Therefore, by adopting this configuration, if mud return is slow, automatically reduce the traveling speed of the rice transplanter to give time to return mud and encourage the return of mud to raise floating seedlings. It can be avoided and appropriate planting becomes possible.

FIG. 15 shows a partial side view when the planting depth motor 160 is provided in the center float 14C of the rice transplanter shown in FIG.
Moreover, when it is judged from the detection value by the width sensor 150 that the return of mud is slow, a configuration in which deep planting is automatically performed may be used.
When it is determined that the mud returns slowly, the planting depth motor 160 connected to the center float 14C via the link mechanism R is operated to move the center float 14C up and down (the vertical movement width is indicated by α). This increases the seedling planting depth. When the motor shaft 160a of the planting depth motor 160 rotates in the direction of arrow a1, the gear 161 that meshes with the gear 160b provided on the motor shaft 160a rotates about the fulcrum P in the direction of arrow b1. The center float 14C moves upward by operating in the direction of the arrow c1 via a coupling mechanism (link mechanism) L between the support shaft 162 of the gear 161 and the center float 14C. Further, when the motor shaft 160a of the planting depth motor 160 rotates in the arrow a2 direction, the gear 161 that meshes with the gear 160b provided on the motor shaft 160a rotates about the fulcrum P in the arrow b2 direction. The center float 14C moves downward by operating in the direction of the arrow c2 via the connecting mechanism L between the support shaft 162 of the gear 161 and the center float 14C.
By this structure, the planting depth of a seedling can be adjusted by changing the raising / lowering degree of the seedling planting part 4 according to the depth of the groove | channel.

In FIG. 16, the block diagram which changes the extrusion timing of the seedling by the seedling planting tool 22 is shown.
Further, the operation cycle of the seedling planting tool 22 may be automatically changed according to the mud return level obtained from the value detected by the width sensor 150.
As an inter-strain changing means for changing the operation cycle of the seedling planting tool 22, an inter-strain change lever 36 for performing an inter-strain change operation is provided below the bonnet 32 in FIG. However, it is preferable to provide a control device (not shown) for controlling the seedling planting tool 22 so that the seedling push-out timing can be automatically changed. Since the seedling is pushed out by the urging force of a pushing spring (not shown), the timing at which the pushing is completed slightly changes depending on the operating speed of the seedling planting tool 22 in the planting operation locus.

According to the present embodiment, the rotation timing of the metal 163 by the actuator 165 changes the phase of the fixed sun gear that operates the rotary seedling planting tool 22 to change the extrusion timing.
For example, when it is determined that the return of mud is slow from the detection value by the width sensor 150, the timing of pushing the seedling by the seedling planting tool 22 may be automatically made faster. By increasing the timing of seedling extrusion, it is possible to prevent floating seedlings by planting deeper. When the return of the mud is slow, if the operation of the seedling planting tool 22 is fast, the seedling push-out timing is delayed and a floating seedling is formed. If the seedling extrusion timing is delayed, even if the seedling is pushed out, it will push out at a higher position with respect to the soil surface, so that it becomes a floating seedling. In addition, when it is judged that the return of mud is fast from the detection value by the width sensor 150, even if planted slightly shallowly, the return of mud is fast, so that floating seedlings are hardly generated.

  Therefore, by adopting this configuration, it is possible to automatically change the timing of pushing the seedling by the seedling planting tool 22 according to the return state of the mud obtained from the detection value by the width sensor 150, so that floating seedlings can be prevented.

In FIG. 17, it replaces with the seedling planting part 4 shown in FIG. 1, and the simple side sectional view of the direct sowing apparatus 55 at the time of attaching the direct sowing apparatus 55 is shown.
On the other hand, as a reference example, when the direct sowing device 55 is attached to the rear portion of the traveling vehicle body 2 via the lifting link device 3 instead of the seedling planting portion 4, the seed supported by the support frame 69 on the upper portion of the direct sowing device 55 A sheet (may be a cushion or the like) 110 made of a soft material, an elastic body, or the like as a buffering agent may be laid on the upper surface of the discharge cylinder 68 connected to the seed feeding part 67 for feeding seeds from the tank 63. The sheet 110 may be a simple plate. The discharge cylinder 68 is for collecting seeds in the seed tank 63, and there is a cylinder (not shown) for seeding the field in addition to the discharge cylinder 68.

The seeds in the seed tank 63 are fed to the seed feeding unit 67 by a predetermined amount from the feeding roller 67 a, sprayed by air or the like, and the seeds are discharged from a discharge cylinder 68 connected to the seed feeding unit 67. The seed pod remaining in the seed tank 63 is discharged from the seed feeding portion 67 to the discharge cylinder 68. However, since it is discharged with air or the like, the coating layer on the surface of the seed may be peeled off at that time. In other words, when the seed drops 67 are vigorously dropped onto the discharge cylinder 68, the impact may cause the coating layer on the seed surface to be removed.
However, by adopting this configuration, even if seeds are vigorously discharged from the seed feeding portion 67 to the discharge cylinder 68 by air or the like, the impact due to dropping is absorbed by the sheet 110, so that the coating layer on the seed surface is formed. It can prevent peeling.

  The seedling transplanter of the present invention is not limited to a rice transplanter, and may be used as a seedling transplanter for planting other seedlings such as vegetable seedlings. Also, a riding seedling transplanter or a walking seedling transplanter may be used.

DESCRIPTION OF SYMBOLS 2 Traveling vehicle body 3 Lifting link apparatus 4 Seedling planting part 5 Fertilizer 6 Seedling feeder (seedling tank) 6a Front plate 6b Seedling outlet 6c Seedling feeding belt 6d Partitioning ridge 6e Seedling part 10 Front wheel 11 Rear wheel 11a Rear Wheel transmission shaft 12 Mission case 13 Seedling planting device 14 Float 15 Main frame 18 Rear wheel gear case 20 Engine 21 Belt 22 Seedling planting tool 24 Engine output pulley 25 Clutch case 26 Counter shaft 27 (27a, 27b) Leveling rotor 28 Planting Transmission shaft 29 Hydrostatic transmission 29a Shift lever 30 Engine cover 31 Driver's seat 32 Bonnet 34 Handle 35 Support arm 36 Stock change lever 39 Support frame 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 45 Swing arm 46 Lifting Hydraulic cylinder 50 transmission case 0a distribution power transmission section 51 portion for planting clutch 52 furrow clutch lever 53 seedlings feeding section clutch 55 direct seeding apparatus 60 manure storage tank 61 fertilizer and feed unit 62 ridge clutch unit (Unit cable)
63 Seed tank 64 Groover 65 Support plate 67 Seed feeding part 67a Feeding roller 68 Discharge cylinder 69 Support frame 70 Motor 70a Gear 71 Gear 71a Rotating shaft 72 Planting cable 72a First planting cable 72b Second planting Attached cable 73 Seedling feed cable 73a First seedling feed cable 73b Second seedling feed cable 75 Cam 78 Transmission shaft 79 Rotor vertical position adjustment lever 80 Operation arm 80a First operation arm 80b Second operation arm 81 Roller 82a , 82b Support point 83 Angle sensor 90 Servo motor 90a Rotating shaft 91, 92, 93, 94 Wire 96 Extension seedling tank 96a Support point 100 Hard / soft sensor 101, 142 Rotating body 101a Rotating shaft 103 Load measurement sensor 105 Rotation number detection sensor 107 Arm 109 Support arm 10 a pivot shaft 110 sheet 120 V-shaped hardness sensor 120a spring 120b rod 129 connecting portions 130 float sensor 130a potentiometer 130b small float 140 hardness sensor 141 potentiometer 142 rotator 150 hardness sensor (width sensor)
150a Spring 151 Bifurcated support arm 152 Rod 160 Planting depth motor 163 Metal 165 Actuator 170 Seedling feed drive cam 172 Seedling feed arm 174 Rotating shaft 176 Link 178 Chain 206 Drive side clutch body 207 Passive side clutch body 206a, 207a Clutch tooth 207b Clutch pin groove 209, 214 Spring 210 Sprocket 211 Washer 213 畦 Clutch pin 216 Chain 219 L-shaped shifter arm 220 Seedling feed drive roller 221 Drive side clutch body 223 Drive roller L Linking mechanism R Link mechanism

Claims (1)

Corresponding to each seedling mounting part (6e) from a traveling vehicle body (1) provided with a traveling device (2, 3) and a plurality of seedling mounting parts (6e) provided on the left and right in the forward direction of the traveling vehicle body (1) The seedlings on the seedling mounting part (6e) are moved left and right and supplied one by one to the seedling outlets (6b) provided on the left and right so that one row of seedlings is supplied from the seedling outlet (6b). Once removed, the seedling feeding device (6) for sending the seedlings in the next row to the seedling removal outlet (6b) by the seedling feeding belt (6c), and the seedling planting device (13) for planting the seedlings taken out from the seedling removal outlet (6b) ), And a plurality of the seedling feeding belt (6c) and the seedling planting device (13) are provided corresponding to the plurality of seedling outlets (6b), respectively. A partial clutch for planting (51) for turning on and off the transmission to a part of the seedling planting device (13), and part of the seedling planting Provided with a seedling feed partial clutch (53) for turning on and off the transmission to a part of the seedling feed belt (6c) corresponding to the position (13), and an inner and an outer for operating the planting partial clutch (51) A planting cable (72a, 72b, 72A, 72B) and a seedling feeding cable (73a, 73b, 73A, 73B) comprising an inner and an outer for operating the seedling feeding partial clutch (53), When the inner cable (72a, 72b) of the planting cable (72a, 72b, 72A, 72B) is pulled, the planting partial clutch (51) is transmitted and the planting cable (72a, 72b) , 72A, 72B), the transmission of the planting partial clutch (51) is cut off by the return operation of the inner cables (72a, 72b,). When the inner cable (73a, 73b) of the cable (73a, 73b, 73A, 73B) is pulled, the seedling feeding partial clutch (53) is cut off and the seedling feeding cable (73a, 73b, 73A, 73B) The transmission of the seedling feeding partial clutch (53) is turned on by the return operation of the inner cables (73a, 73b), and the planting partial clutch (51) and the seedling feeding partial clutch ( 53) a plurality of strips having a structure in which a planting cable (72a, 72b, 72A, 72B) and a seedling feeding cable (73a, 73b, 73A, 73B) for operating each of 53) are connected to a common operation arm (80a, 80b). In planting seedling transplanter,
Planting cables (72a, 72b, 72a, 72b, 72b, 72B, 72A, 72B) and planting cables (73a, 73b, 73A, 73B) in the vicinity of the connecting portion between the operation arm (80a, 80b), planting cables (72a, 72b, 72A, 72B) 72A, 72B) and the seedling feeding cables (73a, 73b, 73A, 73B) are arranged so that the longitudinal directions thereof are the same, and the planting cables (72a, 72b, 72A, 72B) and the seedling feeding are arranged. One of the cables (73a, 73b, 73A, 73B) connects the inner cable (72a, 72b) to the operation arm (80a, 80b), and the other connects the outer cable (73A, 73B) to the operation arm (80a, 80b). A seedling transplanting machine characterized in that it is connected to

Images