JP6514659B2 - Rice transplanter - Google Patents

Description

  The present invention relates to a rice transplanter, and more particularly, to a rice transplanter having a plurality of working units attached to the rear of a planting unit.

  In agricultural work, a working vehicle such as a rice transplanter is used which connects various working machines to a traveling machine and performs desired work while traveling. A rice transplanter is provided with a planting unit connected to the rear of a traveling vehicle, and is configured to plant seedlings in the paddy field while traveling. The planting section has a seedling platform on which a seedling mat is placed, and a planting device for scraping a predetermined amount of seedling from the seedling mat and planting it in a field. Then, a predetermined amount of seedlings are scraped from the seedling mat by the planting claws of the planting device, and the seedlings are inserted into the field, whereby the seedlings are planted in the field.

  Some rice transplanters are known to have a plurality of spraying devices, for example, a spraying device for spraying a drug in a field, or a spraying device for spraying a drug on a seedling mat placed on a seedling platform. The sprayer may be located behind the seedling platform. And various power transmission mechanisms to a plurality of spreading devices arranged behind such a seedling loading stand are examined.

  For example, in Patent Document 1, a plurality of fertilizer delivery parts are juxtaposed, and three supporting points having the same length from the rotation adjustable fulcrum shaft which is the same axis laid horizontally in the lower front of each fertilizer delivery part The arms are extended in the same direction, and the lever fixed on one end side of the fulcrum shaft is provided so as to be able to be fixed and released, and each drive shaft for rotationally driving each delivery roll in each fertilizer delivery portion The base is fitted with a one-way clutch, and the other end of each swing link connected to the tip of each fulcrum arm via a connection pin and the tip of each rotating arm are interlocked via an interlocking link. In the fertilizing machine attached to the planting section at the rear of the rice transplanter configured in a connected manner, each crank driven from the inside of the case is pivoted on the lateral side of the rear of each planting case, and the tip of each crank And each rocking The middle part of the link is interlocked and connected via each interlocking rod, the interlocking interlocking connection position of each rocking link and each crank is set respectively, and the phase of the other crank is shifted with respect to the crank on one end side A drive device is disclosed, characterized in that it is configured.

Japanese Utility Model Publication No. 08-1619

  According to the configuration of Patent Document 1, each swing link and each interlocking connection position of each crank are set respectively, and all the other cranks have a phase difference with respect to the crank on one end side, and power is transmitted by each rotation. Since it is possible to distribute cyclical loads such as torsion applied to the fulcrum shaft side of each fulcrum arm, it is possible to increase link efficiency while reducing vibration, and fertilization amount It can be said that the transmission can be stabilized so that the variation of Furthermore, in the state where the planting part at the rear of the rice transplanter is equipped with a fertilizer applicator with a wide width, transmission of vibration to the planting part at the rear of the rice transplanter is reduced, and the balance between the left and right is improved. Planting work can be carried out.

  Here, the rice transplanter in Patent Document 1 has a configuration in which power is transmitted from the planting unit to each of the fertilizer delivery units via the link mechanism, that is, a configuration including a plurality of link mechanisms interlockingly connected with the planting unit. There are many parts, and there is room for improvement in productivity and maintainability.

  Then, the objective of this invention is providing a rice transplanter which transmits motive power from a planting part to several operation | work parts by simple structure.

In order to solve the above problems, the present invention is
Planting department,
A plurality of working units attached to the rear of the planting unit;
A power transmission mechanism that transmits power from the planting unit to the plurality of working units;
In the rice transplanter equipped with
The power transmission mechanism is
An input rod whose one end is connected to the power transmission system of the planting section;
A plurality of output rods each having one end connected to a power transmission system of the plurality of working units;
A swingable counter arm,
Have
The other end of the input rod and the other end of the plurality of output rods are connected to the counter arm ,
The plurality of working units are a first working unit and a second working unit disposed behind the first working unit.
The counter arm is disposed between the first working unit and the second working unit and is swingable in the front-rear direction,
The power transmission mechanism, in accordance with the swinging of the counter arm, alternatively characterized that you transmit power to the first work unit or the power transmission system of the second working section.

  Furthermore, the counter arm is characterized in that the distance from the other end of the output rod to the rocking fulcrum of the counter arm can be changed.

Furthermore, the output rod connected to the power transmission system of the first working unit extends forward from the counter arm and is connected to the power transmission system of the first working unit via a first one-way clutch. And
The output rod connected to the power transmission system of the second working unit extends rearward from the counter arm and is connected to the power transmission system of the second working unit via a second one-way clutch. It is characterized by

Furthermore, the power transmission mechanism
Power is transmitted to the power transmission system of the first working unit when the output rod connected to the power transmission system of the first working unit is pulled backward;
When the output rod connected to the power transmission system of the second working unit is pulled forward, power is transmitted to the power transmission system of the second working unit. Do.

According to the present invention, a rice transplanter comprising a planting unit, a plurality of working units attached to the rear of the planting unit, and a power transmission mechanism that transmits power from the planting unit to the plurality of working units. In the power transmission mechanism, the power transmission mechanism includes: an input rod whose one end is connected to the power transmission system of the planting unit; and a plurality of output rods whose one ends are connected to the power transmission system of the plurality of working units; A freely configured counter arm, the other end of the input rod and the other end of the plurality of output rods are connected to the counter arm, and the plurality of working units are a first working unit And a second working unit disposed behind the first working unit, wherein the counter arm is disposed between the first working unit and the second working unit in the front-rear direction. And the power transmission mechanism is Corresponding to a swing of Amu, the first work unit or the second Runode to transmit alternatively power to the power transmission system of the working unit, a simple configuration, the power to the plurality of working portions We can provide rice transplanters to distribute. And while productivity is improved, connection and disconnection of the motive power from a planting part to several operation parts becomes easy, and detachment | desorption of several operation parts becomes easy. Furthermore, balanced power transmission can be performed, and rattling and vibration can be reduced. Furthermore, it is possible to prevent the driving load of the first working unit and the second working unit from being simultaneously applied to the power transmission mechanism.
To improve the durability and to drive the first working unit and the second working unit well.
it can.

  Furthermore, since the counter arm is configured to be able to change the distance from the other end of the output rod to the swing fulcrum of the counter arm, the power to be distributed to a plurality of working parts can be easily adjusted. Easy to use.

  Furthermore, the output rod connected to the power transmission system of the first working unit extends forward from the counter arm and is connected to the power transmission system of the first working unit via a first one-way clutch. The output rod connected to the power transmission system of the second working unit extends rearward from the counter arm and is connected to the power transmission system of the second working unit via a second one-way clutch According to the configuration, it is possible to prevent the drive load of the first working unit and the second working unit from being simultaneously applied to the power transmission mechanism, the durability is improved, and the first working unit and the second working unit Can be driven well.

  Furthermore, the power transmission mechanism transmits power to the power transmission system of the first working unit when the output rod connected to the power transmission system of the first working unit is pulled backward, The output rod is configured to transmit power to the power transmission system of the second working unit when the output rod connected to the power transmission system of the second working unit is pulled forward. Since only a tensile load acts on the shaft, the durability of the power transmission mechanism is improved.

It is the schematic side view in which an example of the rice transplanter which concerns on embodiment of this invention was shown. It is a schematic plan view of the rice transplanter of FIG. It is a figure for demonstrating the transmission path of the motive power to a planting part. It is a schematic rear view in which an example of a seedling loading stand was shown. It is a schematic side view of the seedling loading stand of FIG. 4, FIG. 5A is a general view of a seedling loading stand, FIG. 5B is an enlarged view of the vicinity of a support plate. It is a schematic perspective view in which an example of a seedling mat pressing tool was shown. It is the schematic side view in which an example of the state in which the seedling loading stand was folded was shown. It is the schematic side view in which an example of the state in which the seedling mat presser was rotated upward was shown. It is the schematic side view in which an example of the state in which the seedling mat presser was rotated downward was shown. It is the schematic side view in which an example of the 1st spraying device and the 2nd spraying device was shown. FIG. 11 is a schematic rear view showing an example of a spraying unit of the first spraying device of FIG. 10; FIG. 11 is a schematic back view of the second spray device of FIG. 10; It is the schematic side view in which an example of the dispersion | distribution power transmission mechanism was shown. It is the schematic plan view in which an example of the parallel link mechanism was shown. It is the schematic side view in which an example of the support part of a support frame was shown. FIG. 5 is a schematic side view showing an example of a clamp lock; FIG. 17A is a schematic plan view showing an example of the link rotation lock, FIG. 17A is a state before the rotation of the link arm is restricted, and FIG. 17B is a state after the rotation of the link arm is restricted. is there. It is the schematic plan view in which an example of the state which moved the 1st spraying apparatus and the 2nd spraying apparatus back was shown. It is the schematic side view in which an example of the state which moved the 1st spraying apparatus and the 2nd spraying apparatus back was shown.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic side view showing an example of a rice planter 1 according to an embodiment of the present invention, and FIG. 2 is a schematic plan view of the rice planter 1 of FIG. In the following, for convenience of explanation, the left side in FIG. 1 is the forward direction, the right side in FIG. 1 is orthogonal to the forward direction, and the horizontal side is the right direction, and the front side is the left direction. The upper side in FIG. 1 which is perpendicular to the front direction and is vertical is the upper side, and the lower side is the lower side. Moreover, the traveling body 2 of the rice transplanter 1 is mainly shown by FIG. And in FIG. 2, the 1st spraying apparatus 85 mentioned later is shown with a dashed-two dotted line, and description of the parallel link mechanism 126 grade | etc., Mentioned later is abbreviate | omitted.

  As shown in FIG. 1 and FIG. 2, the rice transplanter 1 is attached to the traveling machine body 2 on which the operator rides, the planting unit 20 connected to the rear of the traveling machine 2, and the rear of the planting unit 20 A first spreading device 85 as a first working unit and a second spreading device 101 as a second working unit are provided. And although a detail is mentioned later, power is transmitted from the planting part 20 to the 1st spraying device 85 and the 2nd spraying device 101 by the spraying power transmission mechanism 111. As shown in FIG.

  In the traveling body 2, an engine 4 as a power source is mounted on a front portion of the vehicle body frame 3, and a transmission case 5 is provided behind the engine 4. A front wheel 6 is provided on each of the left and right sides of the transmission case 5 via a front axle case (not shown). At the rear of the transmission case 5, a rear axle case 8 in which rear wheels 7 are supported on the left and right is provided. That is, the traveling vehicle body 2 is provided with front wheels 6 on the left and right sides of the front, rear wheels 7 on the left and right sides of the rear, and the vehicle is supported by the front wheels 6 and the rear wheels 7 so as to travel freely.

  In the bonnet 9, an engine 4, a control unit (not shown), a generator (not shown), a radiator (not shown), a cooling fan (not shown) and the like are provided. The left and right sides of the hood 9 are provided with spare seedling mounts 10 attached to the vehicle body frame 3. A battery (not shown) supported by the vehicle body frame 3 is provided below the reserve seedling support 10 on the right side. The generator is coupled to the output of the engine 4 so as to operate with the engine 4 as a motive power. The battery is connected to a generator, and the power generated by the generator is charged to the battery. The vehicle body frame 3 is covered by a vehicle body cover 11 from above. A steering handle 12 is provided at the rear of the bonnet 9 so as to project upward, and a driver's seat 13 is provided at the rear of the steering handle 12 at a predetermined distance. The operation of various devices provided in the rice transplanter 1 is controlled by the control unit.

  The power of the engine 4 is transmitted from the output unit to the transmission case 5 via a hydrostatic static transmission (HST), which is a hydrostatic continuously variable transmission (not shown). The transmission case 5 includes a main clutch (not shown), a transmission (not shown), a differential (not shown), and the like. The left and right front wheels 6 are interlocked with the output portion of the engine 4 via a transmission and a differential device inside the transmission case 5 and a power transmission mechanism including a gear and a shaft built in the front axle case. In addition, the left and right rear wheels 7 are connected via a transmission in the transmission case 5, a drive shaft 14 extending rearward from the rear of the transmission case 5, a power transmission mechanism including gears and shafts incorporated in the rear axle case 8, and the like. Is interlocked with the output unit of the engine 4. The traveling body 2 is configured to drive the front wheels 6 and the rear wheels 7 by the power of the engine 4 so as to be able to move forward or backward.

  In addition, the traveling machine body 2 includes a fertilization device 15 behind the driver's seat 13. The fertilization apparatus 15 is comprised from the several fertilization unit arrange | positioned in a line with the left-right direction. Each fertilization unit corresponds to each of a plurality of planting devices 22 to be described later, and a hopper 16 for containing a drug such as fertilizer as a content, and a feeding unit 17 for taking out a predetermined amount of the drug from the hopper 16 And a discharge device 19 for discharging the medicine taken out of the hopper 16 to the field through the flexible hose 18 and the like. One end of the hose 18 which is a drug outlet is located in the vicinity of the corresponding planting device 22.

  In addition, traveling machine body 2 is not limited to the above-mentioned composition, but planting part 20 should be connected, and it should just be the composition which can do the planting work of a seedling by planting part 20 while traveling. A configuration not including 15 or a configuration including an electric motor as a power source instead of the engine 4 may be used.

  The planting unit 20 includes a seedling platform 21 on which a seedling mat is placed, a plurality of planting devices 22 for planting seedlings in a field, and the like. The planting unit 20 is connected to the rear of the traveling body 2 via an elevation link mechanism including the top link 23 and the lower link 24 and is lifted and lowered by a hydraulic lifting device (not shown) included in the traveling body 2. Is configured as.

  Here, the planting unit 20 of the present embodiment is an eight-row planting type. The seedling loading stand 21 is comprised from eight unit seedling loading stands 25a-25h arrange | positioned in a line by the left-right direction, and inclines in front height back low. Behind the lower end of the seedling stage 21, eight planting devices 22a to 22h are arranged in a line in the left-right direction. The eight planting devices 22a to 22h correspond to eight unit seedling platforms 25a to 25h, respectively, and the planting unit 20 includes one planting device 22 for one unit seedling platform 25. It is. In addition, the planting part 20 is not limited to the thing of 8 row planting types, 6 row planting types etc. may be sufficient.

  The planting unit 20 has a planting frame 26 below the seedling platform 21 for supporting the seedling platform 21 and a plurality of planting devices 22 and the like. The planting frame 26 includes a main frame 27 extending in the left-right direction, four planting transmission cases 28 a to 28 d extending rearward from the main frame 27, and the like. Planting devices 22 are respectively disposed on the left and right of the rear end portion of each of the planting transmission cases 28. A center case 29 is disposed substantially at the center in the left-right direction of the main frame 27. Although details will be described later, the center case 29 incorporates a power transmission mechanism such as a gear (not shown) and the power from the engine 4 is provided in the center case 29. Here, an input drive (not shown) is provided. It is transmitted to the axis. Furthermore, in the inside of the planting transmission case 28, the power from the engine 4 transmitted to the center case 29 is transmitted to the two planting devices 22 disposed in the respective planting transmission case 28, as shown in the figure. A power transmission shaft (not shown) is built in. Further, below the planting frame 26, a center float 30 and a pair of left and right side floats 31 that are grounded when planting seedlings are provided.

  The seedling platform 21 is supported by the main frame 27 and the planting transmission case 28 via the lower guide rail 32 and the upper guide rail 33, and is configured to reciprocate laterally with respect to the planting transmission case 28. . In addition, two unit seedling loading stands 25a and 25b located in the left side are comprised so that it can remove from the planting part 20 in the connected state. In addition, although the details will be described later, the seedling loading stand 21 conveys the placed seedling mat downward from above and transports the vertical feeding mechanism, and the seedling mat pressing tool for pressing the seedling mat against the seedling loading stand 21; It also includes an upper support bar 57 and two lower support bars 58 for supporting the two unit seedling platforms 25a and 25b that have been removed.

  The planting device 22 is a rotary type planting device, and includes a rotary case 34 rotatably supported by the planting transmission case 28 and a planting case 35 rotatably supported at both ends of the rotary case 34. Be done. Inside the rotary case 34, a power transmission mechanism such as a gear (not shown) interlocked with the planting case 35 is incorporated. On the other hand, the planting case 35 has a planting claw 36 and a push rod (not shown) configured to be axially movable back and forth along the planting claw 36.

  The planting device 22 is configured such that when the rotary case 34 makes one rotation, the planting case 35 makes one reverse rotation with respect to the rotary case 34. Then, in the planting device 22, the planting claw 36 reciprocates between the seedling platform 21 and the field, and the locus of the tip of the planting claw 36 with respect to the planting transmission case 28 is an elliptical closed loop long in the vertical direction It is configured to have a locus of shape. The push rod advances toward the tip of the planting claw 36 when the tip of the planting claw 36 comes close to the lower limit point of its reciprocating movement as the rotary case 34 rotates, and the planting claw 36 When rising from the lower limit point of the reciprocation movement, it is configured to retract from the tip of the planting claw 36.

  The planting apparatus 22 configured in this manner is a planting mat from the seedling mat placed on the seedling platform 21 by the planting claws 36 when the planting claw 36 descends downward from above the seedling platform 21. The tip of the planting claw 36 is inserted into the field in the vicinity of the lower limit point of lowering of the tip of the planting claw 36. At this time, the seedlings scraped off by the push rod are pushed toward the field and the seedlings are planted in the field. Thereafter, the planting claw 36 ascends so as to get out of the field.

  Next, a transmission path of power from engine 4 to planting unit 20 will be described. FIG. 3 is a diagram for explaining a power transmission path to the planting unit 20. As shown in FIG. In addition, in FIG. 3, the planting transmission case 28a located in the leftmost, the planting transmission case 28d located in the rightmost, and the planting devices 22a and 22b disposed in these planting transmission cases 28a and 28d. , 22g, 22h, etc. are omitted. As described above, the motive power of the engine 4 is transmitted from the output unit to the transmission case 5 via the HST, shifted by the transmission case 5, and transmitted to the planting unit 20 via the inter-share transmission 37. The power of the engine 4 transmitted to the transmission case 5 is distributed to and transmitted to the left and right front axles, the drive shaft 14 and other devices.

  The inter-share transmission 37 is disposed at the rear of the traveling body 2 (see FIG. 1), and the power from the transmission case 5 is transmitted to the inter-share input shaft 38. The power transmitted to the inter-share input shaft 38 is composed of a plurality of inter-share transmission mechanisms 39 composed of a plurality of gears and shifters capable of shifting in two stages sequentially, and a plurality of gears and shifters capable of shifting in three stages. It is transmitted to the inter-share output shaft 42 via the main inter-stock transmission mechanism 40 and the planting clutch 41. Therefore, the inter-share transmission 37 is configured to be able to shift the power in six steps by the inter-share transmission mechanism 39 and the inter-share transmission mechanism 40. The main stock transmission mechanism 40 is configured to include an eccentric gear, and is configured to be able to shift power in three stages of two stages of equal speed and one stage of unequal speed. The inter-share transmission 37 is also configured to be able to transmit the power transmitted to the inter-share input shaft 38 to the fertilization output shaft 44 via the fertilization clutch 43 on the upstream side of the main inter-share transmission mechanism 40. The above-mentioned fertilization device 15 is interlockingly connected with the fertilization output shaft 44.

  The inter-share output shaft 42 is interlocked with the drive input shaft 46 of the center case 29 via the PTO shaft 45. The centering case 29 is provided with a planting output shaft 47 which protrudes from the left and right side surfaces and extends in the left-right direction. Inside the center case 29, a power transmission mechanism including a gear or the like for transmitting the power of the drive input shaft 46 to the planting output shaft 47 is incorporated.

  Further, the center case 29 is provided with a transverse feed output shaft 48 which protrudes from the left and right side surfaces and extends in the left-right direction, similarly to the planting output shaft 47. The center case 29 transfers the power transmitted to the drive input shaft 46 to the upstream side of the planting output shaft 47 via the transverse feed transmission mechanism 49 configured of a plurality of gears, shifters, etc. that can be shifted in three steps. , And can also be transmitted to the cross feed output shaft 48. That is, the center case 29 is configured to be able to distribute the power transmitted to the drive input shaft 46 to the planting output shaft 47 and the crossfeed output shaft 48. And the above-mentioned seedling loading stand 21 is comprised so that left-right reciprocating movement may be carried out with respect to the planting transmission case 28 by rotation of the crossfeed output shaft 48. As shown in FIG.

  The four power transmission shafts 50 built in each of the planting transmission cases 28 are interlocked and connected to the planting output shaft 47 via the safety clutches 51 respectively. Here, the planting output shaft 47 is divided to correspond to the four power transmission shafts 50 and connected by a coupling (not shown).

  A drive shaft 53 is interlocked and connected to a rear end portion of the power transmission shaft 50 via a locking clutch 52. The drive shaft 53 projects leftward and rightward from the rear end portion of the planting transmission case 28, and the rotary case 34 is fixed. The rotary case 34 incorporates a plurality of gears and has two laterally projecting support shafts 54. The two support shafts 54 are interlocked with the drive shaft 53 via gears incorporated in the rotary case 34, and the planting case 35 is fixed.

  And, as the drive shaft 53 is rotated by the power transmitted from the planting output shaft 47 through the power transmission shaft 50, the planting device 22 rotates the rotary case 34 as described above, and the planting is carried out. The case 35 rotates in the reverse direction with respect to the rotary case 34, the planting claw 36 reciprocates between the seedling platform 21 and the field, and the seedling is planted in the field.

  Here, the scattering output shaft 55 is interlocked and coupled to the power transmission shaft 50 built in the planting transmission case 28b. The scattering output shaft 55 protrudes rearward from the rear end portion of the planting transmission case 28b, and the crank 56 is fixed to the tip thereof. The output shaft of the crank 56 is connected to one end of an input rod 112 of a distribution power transmission mechanism 111 for transmitting power to the first distribution device 85 and the second distribution device 101. In addition, the scattering output shaft 55 has the quick joint 116 in the part protruded from the planting transmission case 28b. The spread output shaft 55 is configured to be divided by the quick joint 116 into the side of the power transmission shaft 50 and the side of the input rod 112 without using a tool or the like. Further, the output shaft of the crank 56 is eccentrically disposed at a position parallel to the scatter output shaft 55 and deviated from the scatter output shaft 55. That is, the output shaft of the crank 56 is eccentrically rotated around the scattering output shaft 55.

  Although the details will be described later, the distribution power transmission mechanism 111 includes an input rod 112, two output rods 113 and 114, a counter arm 115, and the like. The other end of the input rod 112 is connected to the counter arm 115. One end of the output rod 113 is connected to the power transmission system of the first scattering device 85, and the other end is connected to the counter arm 115. One end of the output rod 114 is connected to the power transmission system to the second scattering device 101, and the other end is connected to the counter arm 115. The counter arm 115 is swingably supported in the front-rear direction with a swing shaft 124 extending in the left-right direction as a support shaft. Then, the spraying power transmission mechanism 111 causes the planting unit 20 (power transmission shaft 50) to power the first spraying device 85 as a first working unit and the second spraying device 101 as a second working unit. It is configured to communicate.

  In addition, the structure which transmits motive power from the engine 4 to the planting part 20 is not limited to the above-mentioned structure. For example, instead of the shaft such as the power transmission shaft 50, power may be transmitted using an endless chain. Further, the transmission of power from the planting unit 20 to the first spray device 85 and the second spray device 101 by the spray power transmission mechanism 111 transmits power from the power transmission shaft 50 built in the planting transmission case 28b. It is not limited to the configuration. The dispersion power transmission mechanism 111 may be configured to transmit power from the power transmission system of the planting unit 20, and may be powered from another planting transmission case 28, for example, a power transmission shaft 50 built in the planting transmission case 28c. May be transmitted.

  Next, the seedling loading stand 21 will be described. 4 is a schematic rear view showing an example of the seedling loading stand 21, FIG. 5 is a schematic side view of the seedling loading stand 21 of FIG. 4, and FIG. 6 shows an example of a seedling mat presser 60. FIG. 7 is a schematic perspective view, FIG. 7 is a schematic side view showing an example of a state in which the seedling loading stand 21 is folded, and FIG. 8 is an example showing a state in which the seedling mat presser 60 is rotated upward. FIG. 9 is a schematic side view showing an example of a state in which the seedling mat presser 60 is pivoted downward. 5A is an overall view of the seedling loading stand 21, and FIG. 5B is an enlarged view of the vicinity of the support plate 75. As shown in FIG. FIG. 6 is a perspective view of the seedling mat presser 60 as viewed obliquely from the upper left side. As mentioned above, the seedling loading stand 21 is comprised from eight unit seedling loading stand 25a-25h arrange | positioned in a line by the left-right direction, and inclines in front high back low. Two unit seedling loading stands 25a and 25b located in the left side are comprised so that it can remove in the connected state.

  The seedling loading stand 21 also includes an upper support bar 57, two lower support bars 58, 58, a vertical feed mechanism 59, three seedling mat pressers 60a, 60b, 60c and the like. The upper support bar 57 is located on the upper side of the seedling platform 21, is attached between the unit seedling platform 25d and the unitary seedling platform 25e, and extends upward. Two lower support bars 58, 58 are located on the lower side of the seedling platform 21 and mounted between the unit seedling platform 25c and the unit seedling platform 25d and between the unit seedling platform 25e and the unit seedling platform 25f. And extend upward.

  Then, as shown in FIG. 7, the seedling platform 21 removes the two unit seedling platforms 25a and 25b located on the left side, and the unit seedling platforms 25a and 25b are supported by the upper support bar 57 and two lower supports. It is supported by the bars 58 and 58 so that it can be folded and the width in the lateral direction can be narrowed. At this time, the unit seedling platform 25a, 25b is located above the unit seedling platform 25d, 25e. Further, the tip end portion of the upper support bar 57 is inserted into a through hole (not shown) formed in the upper guide rail 33. The left edge of the unit seedling platform 25a and the right side portion of the unit seedling platform 25b are fixed by a lock mechanism (not shown) provided at the tip of the lower support bar 58, respectively. Therefore, the unit seedling loading stand 25a, 25b is supported at three points by the upper support bar 57 and the two lower support bars 58, 58, making it difficult to rattle and easy to attach and detach.

  Two vertical feed mechanisms 59 are provided on each unit seedling platform 25 and are configured of a driven roller 61, a drive roller 62, a seedling feeding belt 63, and the like. The placement unit 64 on which the seedling mat is placed has an opening 67 penetrating between the placement surface 65 on which the seedling mat is placed and the back surface 66 from the substantially central to the lower part in the vertical direction. The driven roller 61 and the drive roller 62 are located on the back surface 66 side of the mounting portion 64, and are disposed to cross the upper portion and the lower portion of the opening 67. The seedling feeding belt 63 is wound so as to circumscribe the driven roller 61 and the driving roller 62. A large number of projections (not shown) are formed on the surface of the seedling feeding belt 63 and project from the opening 67 of the mounting portion 64 toward the mounting surface 65. The vertical feed mechanism 59 intermittently conveys downward the seedling mat held so as to be held between the seedling mat presser 60 and the seedling feeding belt 63 by the driving roller 62 rotating intermittently. It is configured to

  Seedling mat presser 60a corresponds to the two unit seedling platform 25a, 25b, and seedling mat presser 60b corresponds to the three unit seedling platform 25c, 25d, 25e. Seedling mat presser 60c corresponds to three unit seedling loading platforms 25f, 25g, 25h. The three seedling mat pressers 60a, 60b and 60c have the same configuration, and in the following, the configuration will be described by exemplifying the seedling mat presser 60a shown in FIG. 6, and the seedling mat pressers 60b and 60c will be described. The description of the configuration will be omitted as appropriate.

  The seedling mat pressing tool 60 has a plurality of round rod-like vertical pressing rods 68 extending in the vertical direction along the mounting surface 65 of the mounting portion 64 with a predetermined interval, and a round rod-like upper portion extending in the horizontal direction A connecting rod 69, a round rod-shaped lower connecting rod 70 extending in the left-right direction, a rod-shaped seedling scraper 71 extending in the left-right direction, and the like are provided. The vertical pressing rod 68, the upper connecting rod 69, the lower connecting rod 70, and the seedling scraper 71 are formed of round rod-like members that can be flexed and deformed by the operator. The seedling mat presser 60 has two vertical pressing rods 68 for one unit seedling platform 25. That is, the seedling mat presser 60a corresponding to the two unit seedling loading stands 25a and 25b has four vertical presser bars 68. Seedling mat pressers 60b corresponding to the three unit seedling platform 25c, 25d, 25e, and seedling mat pressers 60c corresponding to the three unit seedling platform 25f, 25g, 25h, respectively, six vertical pressing bars 68 Have.

  The upper side end of the vertical pressure bar 68 is bent rearward at an acute angle in a side view, and the lower side end of the vertical pressure bar 68 is bent rearward at a substantially right angle in a side view. The upper end of the vertical pressing rod 68 is joined to the upper connecting rod 69 by welding or the like, and the lower end of the vertical pressing rod 68 is joined to the lower connecting rod 70 by welding or the like. Then, in the seedling mat presser 60 a, four vertical pressing rods 68 are connected by the upper connecting rod 69 and the lower connecting rod 70.

  Both left and right end portions of the upper connecting rod 69 and the lower connecting rod 70 project outward (side) from the vertical pressing rods 68 located at the left and right ends. The left and right end portions of the upper connecting rod 69 are bent forward along the upper end portion of the vertical pressing rod 68 in side view, and are further bent so as to extend outward in left and right in rear view. The both ends of the upper connecting rod 69 extending outward from the left and right sides respectively have annular flanges 72. Further, both left and right end portions of the lower connecting rod 70 respectively have annular flanges 73.

  Cylindrical collars 74 are fixed to both ends of the round rod-like seedling scraper 71. A radially projecting annular flange is formed at one end of the cylindrical collar 74. A flat support plate 75 extending upward and rearward is joined by welding or the like to the vertical pressing rods 68 positioned at both left and right ends. The support plate 75 is disposed on the lower side of the vertical pressing rod 68 and has an engagement hole 76 which is a through hole. The engagement holes 76 extend between the adjacent fitting portions 77 and the fitting portions 77a, 77b, 77c, 77d, 77e, which are five circular through holes arranged in a row in the vertical direction. It is formed from a passage portion which is one through hole. The peripheral edge of the engagement hole 76 is formed in a substantially wave shape. The diameter of the fitting 77 corresponds to the diameter of the collar 74 and is larger than the width of the passage. The width of the passage portion is larger than the diameter of the seedling scraper 71 and smaller than the diameter of the collar 74.

  Both ends of the seedling separating device 71 are supported by the support plate 75. More specifically, a cylindrical collar 74 attached to the seedling scraper 71 is fitted into and supported by the fitting portion 77 of the engagement hole 76. Here, although the details will be described later, the seedling scraping device 71 is for improving the distribution of the medicine to the seedling mat by the first distribution device 85. And the seedling scraping tool 71 is located in the vicinity of the sprinkling port of the first scattering device 85, is placed on the seedling platform 21, and is the plant height of the seedling mat of the seedling mat transported downward by the vertical feed mechanism 59. It is configured to abut on the midway portion.

  In addition, the distance d1 from the mounting surface 65 (seedling feed belt 63) of the seedling loading stand 21 to the seedling scraping tool 71 can be changed by changing the fitting part 77 which the collar 74 fits. The engagement hole 76 has five fitting portions 77a, 77b, 77c, 77d, and 77e, so the distance d1 can be changed in five steps. To change the distance d 1, the seedling scraper 71 is flexed to disengage the collar 74 from the fitting portion 77, and the collar 74 is fitted to the other fitting portion 77. Under the present circumstances, the both ends of the seedling scraping tool 71 can be made to pass through the channel part formed between the adjacent fitting parts 77, and can be made to move to the other fitting part 77, without pulling out from the engagement hole 76. . Therefore, the fitting portion 77 to which the collar 74 fits can be easily changed, which is convenient.

  In the seedling mat pressing tool 60, the upper connecting rod 69 is detachably supported by the two upper support arms 79 formed on the seedling platform 21, and the lower connection is made to the two lower supporting arms 80 formed on the seedling platform 21. The rod 70 is detachably supported and attached to the seedling platform 21. The two upper support arms 79 are disposed on the upper side of the seedling platform 21 and at the left edge of the unitary seedling platform 25a and the right edge of the unitary seedling platform 25b. The upper support arm 79 has fitting holes 81a, 81b and 81c which are three circular through holes arranged in a line in the vertical direction. Then, both ends of the upper connecting rod 69 are inserted into any of the fitting holes 81 of the upper support arm 79 and are rotatably supported. By bending the upper connecting rod 69, both ends of the upper connecting rod 69 can be pulled out from the fitting hole 81, and the fitting hole 81 on which the upper connecting rod 69 is supported can be changed.

  On the other hand, the two lower support arms 80 are disposed below the seedling platform 21 and at the left edge of the unit seedling platform 25a and the right edge of the unit seedling platform 25b. The lower support arm 80 has an engagement hole 82 which is a through hole. The engagement holes 82 are formed from fitting portions 83a, 83b, 83c and 83d which are four circular through holes arranged in a line in the vertical direction. The adjacent fitting portions 83 overlap each other, and the peripheral edge of the engagement hole 82 is formed in a substantially wave shape. The lower connecting rod 70 is rotatably supported in a state in which both ends thereof are inserted into the engaging holes 82 of the lower support arm 80 and fitted in any of the fitting portions 83. By bending the lower connecting rod 70, both ends of the lower connecting rod 70 can be pulled out from the engagement hole 82, and the fitting portion 83 to which the both ends of the lower connecting rod 70 fit can be changed. .

  The seedling mat presser 60 having such a configuration changes the fitting hole 81 for supporting the upper connecting rod 69 and the fitting portion 83 for supporting the lower connecting rod 70, thereby placing the seedling loading stand 21. The distance d2 from the surface 65 (seedling feed belt 63) can be changed. Therefore, regardless of the thickness of the seedling mat placed on the seedling loading stand 21, the seedling mat can be suitably held between the seedling mat presser 60 and the seedling feeding belt 63, and the seedling mat can be transported favorably. it can.

  Further, as shown in FIG. 8, the seedling mat presser 60 is a portion of the upper connecting rod 69 supported by the upper support arm 79 by pulling out both ends of the lower connecting rod 70 from the engaging hole 82. Both ends can be pivoted upward (forward) with the support shaft, and the mounting surface 65 of the seedling carrier 21 can be easily released. Further, as shown in FIG. 9, the seedling mat presser 60 is a portion of the lower connecting rod 70 supported by the lower support arm 80 by pulling out both ends of the upper connecting rod 69 from the fitting hole 81. Both ends can be pivoted downward (backward) with the support shaft, and the mounting surface 65 of the seedling carrier 21 can be easily released.

  That is, the seedling mat presser 60 is rotatably connected to the seedling platform 21 and the holding state where the seedling mat is pressed to the seedling platform 21 and the pressing state of the seedling mat to the seedling platform 21 Is configured to be switchable to the released state where it is released.

  Therefore, the seedling mat presser 60 is convenient because it does not prevent removal of the remaining seedling mat, lifting upward, and maintenance of the seedling mount 21. In addition, since the rotation of the seedling mat pressing tool 60 can be selected between the upper side and the lower side according to the situation of the work, it is easy to use.

  Here, the seedling scraping tool 71 is supported by the support plate 75 attached to the vertical pressing rod 68, and when the seedling mat presser 60 is rotated upward or downward, the seedling scraping tool 71 is a seedling mat It rotates integrally with the pressing tool 60. Therefore, the mounting surface 65 of the seedling carrier 21 can be easily released without removing the seedling scraping tool 71 separately from the seedling mat presser 60, and removal of the remaining seedling mat, lifting up to the upper side, and seedling The maintenance of the table 21 can be easily performed. In addition, since the seedling mat presser 60 and the seedling scraper 71 can be simultaneously set at the working position, it is possible to prevent an operation from being forgotten, which is convenient.

  Next, the first spreader 85 as a first working unit and the second spreader 101 as a second working unit will be described. FIG. 10 is a schematic side view showing an example of the first spray device 85 and the second spray device 101, and FIG. 11 shows an example of the spray unit 86 of the first spray device 85 of FIG. FIG. 12 is a schematic rear view, and FIG. 12 is a schematic rear view showing the second spray device 101 of FIG. In FIG. 10, the placement portion 64 of the seedling platform 21 is shown in cross section, and the seedling mat 98, the seedling 99, and the planting device 22 placed on the seedling platform 21 are shown by two-dot chain lines. . Further, in FIG. 11, the front frame 130 of the parallel link mechanism 126 described later is indicated by a two-dot chain line.

  A first spreading device 85 as a first working unit and a second spreading device 101 as a second working unit are integrally attached to the rear of the planting unit 20 via a parallel link mechanism 126 described later. The first spraying device 85 sprays the medicine from above onto the seedling mat 98 placed on the seedling platform 21, and is disposed behind the seedling platform 21. The second spraying device 101 sprays the medicine in the field, and is disposed behind the first spraying device 85.

  First, the first spraying device 85 will be described. The first spreading device 85 comprises four spreading units 86a, 86b, 86c, 86d, as shown in FIG. The four spreading units 86a, 86b, 86c, 86d are arranged in a row in the left-right direction. One scattering unit 86 corresponds to two unit seedling platforms 25. For example, the scattering unit 86a located on the left side corresponds to two unit seedling platforms 25a and 25b located on the left side, and is viewed in plan And the unit seedling platform 25a and the unit seedling platform 25b. In FIG. 11, two scattering units 86a and 86b located on the left side are shown. The four spreading units 86a, 86b, 86c, 86d have the same configuration, and in the following, the configuration will be described by exemplifying the spreading unit 86a located on the left side, and the configuration of the other spreading units 86b, 86c, 86d The description is omitted as appropriate.

  The spreading unit 86 includes a hopper 87, two feeding portions 88, 88, two lead-out pipes 89, 89, a feeding drive shaft 90, a connecting arm 91, and the like. The hopper 87 has a lid that closes the upper opening, is a transparent resin container, and contains a medicine therein. The lower portion of the hopper 87 is bifurcated at the center in the left-right direction. Lower portions of the hopper 87, which are bifurcated to the left and right, are each formed in a funnel shape that narrows downward. Further, in the hopper 87, a partition plate 92 is formed at a bifurcated branch portion, and is divided into two chambers on the left and right.

  The lower end of the hopper 87 divided into two branches and formed into a funnel shape is connected to the upper portion of the two feeding portions 88, 88, respectively. One end of a lead-out pipe 89 is connected to the lower part of the two feeding parts 88, 88 respectively. Approximately cylindrical delivery rolls 93 and 93 extending in the left-right direction are rotatably accommodated in the two delivery parts 88 and 88, respectively. The substantially cylindrical delivery roll 93 has a plurality of grooves (not shown) extending in the axial direction on the outer peripheral surface. The two delivery rolls 93, 93 are located coaxially with the delivery drive shaft 90 extending in the left-right direction, and are fixed to the delivery drive shaft 90, respectively. By rotating the delivery drive shaft 90, the two delivery rolls 93, 93 respectively accommodated in the two delivery parts 88, 88 can be simultaneously rotated. The inside of the feeding portion 88 is partitioned by the feeding roll 93 into an upper space communicating with the hopper 87 and a lower space communicating with the outlet pipe 89.

  The medicine contained in the hopper 87 is supplied to the upper space partitioned by the delivery roll 93 in the delivery section 88, and a part of the medicine is contained in the groove formed on the outer peripheral surface of the delivery roll 93. Ru. By rotating the delivery roll 93, the medicine contained in the groove of the delivery roll 93 moves to the lower space in communication with the delivery pipe 89 and is supplied to the delivery pipe 89. Therefore, the medicine stored in the hopper 87 is fed out to the lead-out pipe 89 by a predetermined amount by the feeding unit 88.

  The amount of medicine to be delivered by the delivery unit 88 can be adjusted by changing the size and shape of the groove of the delivery roll 93, and the rotational speed of the delivery drive shaft 90. The spraying unit 86 is configured to intermittently dispense the medicine by intermittently rotating the feeding drive shaft 90.

  The spray ports 94, 94, which are the other ends of the lead-out pipes 89, 89, are disposed in the vicinity of the lower portion of the seedling platform 21 in a direction facing the mounting surface 65 on which the seedling mat 98 is mounted. In addition, the derivation | leading-out pipe 89 located in the left side respond | corresponds to the unit seedling mounting stand 25a, and the derivation | leading-out pipe 89 located in the right side respond | corresponds to the unit seedling mounting stand 25b. Then, the medicine delivered by the two delivery parts 88, 88 is released from the spray ports 94, 94 and dispersed respectively on the unit seedling platform 25a and the seedling mat 98 placed on the unit seedling platform 25b.

  The right end of the delivery drive shaft 90 is interlocked via a meshing clutch 95 to a gear case 96 having a built-in power transmission mechanism (not shown) including a gear or the like. The gear case 96 is also interlocked with an intermediate drive shaft 97 to which the output rod 113 of the distribution power transmission mechanism 111 is interlocked and linked via a first one-way clutch (not shown). Therefore, the power transmitted to the distribution power transmission mechanism 111 is transmitted to the delivery drive shaft 90 via the intermediate drive shaft 97 and the gear case 96.

  The connection arm 91 is a rod-like member extending from one delivery portion 88 to the other delivery portion 88, and is detachably attached to a mounting flange 168 formed on the upper surface of the front frame 130 of the parallel link mechanism 126 described later. Therefore, the distribution unit 86 can be removed from the front frame 130 of the parallel link mechanism 126 by disengaging the meshing clutch 95. The gear case 96 is also attached to the front frame 130.

  Here, the spreading unit 86 b is symmetrical to the spreading unit 86 a and is disposed on the right side of the gear case 96. The delivery drive shaft 90 of the spreading unit 86a and the delivery drive shaft 90 of the spreading unit 86b are coaxially arranged. Further, the delivery drive shaft 90 of the spreading unit 86b is interlocked and connected to the gear case 96 via the meshing clutch 95, similarly to the spreading unit 86a. The power input to the gear case 96 is distributed to the distribution unit 86a and the distribution unit 86b.

  The spreading unit 86c is symmetrical with the spreading unit 86b, and the spreading unit 86d is symmetrical with the spreading unit 86a. Similar to the spreading unit 86a and the spreading unit 86b, the spreading unit 86c and the spreading unit 86d have their delivery drive shafts interlocked with another gear case 96 interlocked with the intermediate drive shaft 97. And the motive power transmitted to the dispersal power transmission mechanism 111 is transmitted to the delivery drive shafts of the dispersal unit 86 c and the dispersal unit 86 d via the intermediate drive shaft 97 and another gear case 96. Therefore, the power transmitted to the distribution power transmission mechanism 111 is distributed to the four distribution units 86a, 86b, 86c, 86d by the intermediate drive shaft 97 and the two gear cases 96.

  Here, as described above, the seedling loading stand 21 on which the seedling mat 98 to which the medicine is sprayed is placed by the spreading unit 86 includes the seedling mat pressing tool 60. A seedling scraper 71 is attached to the seedling mat presser 60. As shown in FIG. 10, the seedling scraping tool 71 is located in the vicinity of the spouting port 94, and is also conveyed downward on the mounting surface 65 of the seedling platform 21 by the vertical feed mechanism 59. It is comprised so that it may contact | abut to the grass midway part of the seedling 99 of. Therefore, when the seedling mat 98 is conveyed downward by the vertical feed mechanism 59, the seedling 99 abuts on the seedling scraping tool 71 and is tilted forward, so that the floor soil of the seedling mat 98 on the rear side of the seedling scraping tool 71 A space 100 in which the portion is exposed is formed. The spray port 94 of the spray unit 86 is disposed so that the drug is released toward the space 100 formed by the seedling scraper 71, and the drug is not interfered with the seedlings 99, and the seedling mat 98 is used. Is spread over the soil of the floor. Therefore, the first spraying device 85 can spray the seedling mat 98 effectively with the seedling scraper 71.

  In addition, although the seedling loading stand 21 reciprocates to the left and right with respect to the planting transmission case 28, the seedling scraper 71 and the seedling mat 98 attached to the seedling mat presser 60 are united with the seedling mounting stand 21. Moving. Therefore, when the seedling loading table 21 reciprocates left and right, the seedlings 99 of the seedling mat 98 do not rub in the left-right direction with the seedling scraper 71, and the seedlings 99 are prevented from being damaged. In addition, the space 99 is reliably formed without causing the seedlings 99 to fall in the left-right direction, and the first spray device 85 can perform effective drug dispersion.

  Further, since the seedling scraper 71 is supported by the support plate 75 so that the distance d1 to the placement surface 65 can be changed, regardless of the plant height of the seedling 99 of the seedling mat 98, the first scattering device 85 A space 100 suitable for spraying the medicine can be formed between the seedlings, which is convenient. In addition, if the total length of the seedlings 99 is the same, even if the thickness of the seedling mat 98 (floor soil portion) changes, the space 100 can be changed simply by changing the position (distance d2 to the placement surface 65) of the seedling mat presser 60 It is easy to use because it can be formed.

  In addition, the seedling mat presser 60 is not limited to the above-mentioned structure. The seedling mat presser 60 holds the seedling mat 98 on the seedling platform 21 and is attached to the seedling platform 21 so that the holding state in which the seedling mat 98 is pressed to the seedling platform 21 and the seedling The configuration is only required if it can be switched to the released state in which the pressing of the mat 98 to the seedling platform 21 is released. For example, the seedling mat presser 60 may be configured to be able to pivot with either one of the both ends of the upper connecting rod 69 or the both ends of the lower connecting rod 70 as a support shaft. In addition, the seedling mat pressing tool 60 may be configured to be detachably attached to the seedling loading stand 21 by a bolt or the like.

  Moreover, the seedling scraper 71 is not limited to the above-mentioned structure. Seedling scraper 71 extends in the lateral direction in the vicinity of the spout port 94 of the sprinkling unit 86 for sprinkling the medicine on the seedling mat 98 placed on the seedling platform 21 and extends to the mid height of the seedling 99 of the seedling mat 98. The structure may be in contact with the seedling 99 to tilt the seedling 99 to form a space 100 between the seedlings and to be attached to the seedling mat presser 60. For example, the seedling scraping tool 71 may be configured from a plurality of round bar members whose both ends are supported by the support plate 75.

  Next, the second spraying device 101 will be described. The second spraying device 101 includes a hopper 102, a feeding unit 103, a spraying cover 104, a feeding drive shaft 105, and the like. The hopper 102 has a lid that closes the upper opening, is a transparent resin container, and contains a medicine therein. The lower part of the hopper 102 is formed in the shape of a funnel that narrows downward.

  The lower end of the hopper 102 is connected to the upper portion of the feeding unit 103. The lower portion of the feeding portion 103 is connected to the upper portion at the center in the left-right direction of the scattering cover 104. The inside of the feeding unit 103 has the same configuration as the feeding unit 88 of the first scattering device 85, and a substantially cylindrical feeding roll 106 extending in the left-right direction is rotatably accommodated therein. The substantially cylindrical delivery roll 106 has a plurality of grooves (not shown) extending in the axial direction on the outer peripheral surface. The delivery roll 106 is located coaxially with the delivery drive shaft 105 extending in the left-right direction, and is fixed to the delivery drive shaft 105. By rotating the delivery drive shaft 105, the delivery roll 106 accommodated in the delivery unit 103 can be rotated. The inside of the feeding portion 103 is partitioned by the feeding roll 106 into an upper space communicating with the hopper 102 and a lower space communicating with the scattering cover 104.

  The medicine contained in the hopper 102 is supplied to the upper space partitioned by the delivery roll 106 in the delivery section 103, and a part of the medicine is contained in a groove formed on the outer peripheral surface of the delivery roll 106. Ru. By rotating the delivery roll 106, the medicine contained in the groove of the delivery roll 106 is moved to the lower space communicating with the inside of the spread cover 104, and is supplied to the inside of the spread cover 104. Therefore, the medicine stored in the hopper 102 is fed out to the scattering cover 104 by a predetermined amount by the feeding unit 103.

  The delivery drive shaft 105 is interlocked and connected to the output rod 114 of the distribution power transmission mechanism 111 via the second one-way clutch 122. Therefore, the power transmitted to the distribution power transmission mechanism 111 is transmitted to the delivery drive shaft 105 via the second one-way clutch 122.

  The amount of medicine to be delivered by the delivery unit 103 can be adjusted by changing the size and shape of the groove of the delivery roll 106 and the rotational speed of the delivery drive shaft 105. The second spray device 101 is configured to intermittently deliver the medicine by intermittently rotating the delivery drive shaft 105.

  The spread cover 104 is a hollow rectangular parallelepiped enclosure having an opening 107 on the lower surface and extending in the left-right direction. The inside of the scattering cover 104 is in communication with the lower end of the delivery portion 103 at the upper center in the left-right direction. The spread cover 104 internally includes two guide plates 108 extending respectively from the center to the left and right, and a feeding fan 110 fixed to the output shaft of the electric motor. The guide plate 108 has a plurality of through holes 109 formed at predetermined intervals in the left-right direction. By the guide plate 108, a flow path extending from the center to the left and right, respectively, is formed in the inside of the spread cover 104. The feeding fan 110 is disposed between the two guide plates 108 below the communication portion communicating with the lower end of the feeding portion 103.

  Then, the second spreading device 101 blows off the medicine fed out from the feeding portion 103 into the inside of the spreading cover 104 to the flow path formed by the guide plate 108 by the rotation of the feeding fan 110. The sprayed drug is diffused inside the spray cover 104 and released from the opening 107 of the spray cover 104 through the through holes 109 of the guide plate 108 and the gap between the guide plate 108 and the inner surface of the spray cover 104. It is spread over the field. Therefore, the 2nd spreading | diffusion apparatus 101 is comprised so that a chemical | medical agent can be disperse | distributed to right and left, and it can spray on a field.

  Here, the agents to be dispersed by the first spreading device 85 as the first working unit and the second spreading device 101 as the second working unit are solid particulate agents, for example, fertilizers, herbicides, etc. It can be done.

  In addition, the 1st spraying apparatus 85 and the 2nd spraying apparatus 101 are not limited to the above-mentioned structure. The first spray device 85 may be attached to the rear of the planting unit 20 and may spray the medicine from above onto the seedling mat 98 placed on the seedling platform 21. The 2nd spraying apparatus 101 is arrange | positioned behind the 1st spraying apparatus, and should just be the structure which disperse | distributes a chemical | medical agent to a field. For example, the first spray device 85 and the second spray device 101 may be a spray device that sprays a liquid medicine.

  Next, the spray power transmission mechanism 111 for transmitting power to the first spray device 85 and the second spray device 101 will be described. FIG. 13 is a schematic side view showing an example of the distribution power transmission mechanism 111. As shown in FIG. In FIG. 13, a second one-way clutch 122 described later is indicated by a two-dot chain line. As described above, the dispersion power transmission mechanism 111 includes the input rod 112, the two output rods 113 and 114, the counter arm 115, and the like, and as the first working unit from the planting unit 20 (power transmission shaft 50) The power is transmitted to the first sprayer 85 and the second sprayer 101 as a second working unit.

  One end of the input rod 112 is connected to the power transmission system of the planting unit 20. More specifically, the scatter output shaft 55 interlocked with the power transmission shaft 50 which is a part of the power transmission system of the planting unit 20 protrudes rearward from the rear end portion of the planting transmission case 28b. A crank 56 is fixed to the tip of the spread output shaft 55. One end of an input rod 112 is connected to the output shaft of the crank 56. In addition, the scattering output shaft 55 has the quick joint 116 in the part protruded from the planting transmission case 28b. The spread output shaft 55 is configured to be separated by the quick joint 116 from the side of the power transmission shaft 50 without using a tool or the like.

  A resin protective cover 117 having an opening on the top surface is attached to the rear end of the planting transmission case 28b. The lower part of the protective cover 117 is supported by the rear end portion of the planting transmission case 28b so as to be vertically rotatable about the lateral direction. Further, on the upper portion of the protective cover 117, there is provided a locking projection (not shown) fitted with an unshown engaging portion formed at the rear end of the planting transmission case 28b. The engagement portion of the planting transmission case 28b and the locking projection of the protective cover 117 are configured such that the fitting is released when the protective cover 117 pivots downward about the left-right direction. The scattering output shaft 55, the quick joint 116, the crank 56, and one end of the input rod 112 are covered by the protective cover 117.

  One end of the output rod 113 is connected to the power transmission system of the first spray device 85. More specifically, it is connected to the connection arm 118 of a substantially triangular flat plate in a side view. The connection arm 118 is rotatably supported by an intermediate drive shaft 97 extending in the left-right direction. The intermediate drive shaft 97 is interlocked with the delivery drive shaft 90 of the first spray device 85 via a gear case 96. A first one-way clutch 119 is attached to the intermediate drive shaft 97. The elastic force of a torsion coil spring (not shown) acts on the first one-way clutch 119 in the counterclockwise direction in FIG. 13 and the contact arm 120 extending from the first one-way clutch 119 is connected. It abuts on the edge of the arm 118. The first one-way clutch 119 is in a connected state with the intermediate drive shaft 97 when rotating clockwise (clockwise) in FIG. 13 and performs intermediate driving when rotating counterclockwise (counterclockwise). The shaft 97 is in the disconnected state. Further, the connection arm 118 is orthogonal to the intermediate drive shaft 97.

  When the connecting arm 118 rotates clockwise, the first one-way clutch 119 is rotated clockwise against the elastic force of the torsion coil spring in a connected state with the intermediate drive shaft 97, and the intermediate drive shaft 97 is watch It is pivoted around. On the other hand, when the connection arm 118 rotates counterclockwise, the first one-way clutch 119 is rotated in the counterclockwise direction following the connection arm 118 by the elastic force of the torsion coil spring in a disconnected state with the intermediate drive shaft 97 Be done.

  As described above, one end of the output rod 113 is interlocked and connected to the intermediate drive shaft 97, which is a part of the power transmission system of the first spray device 85, via the connection arm 118 and the first one-way clutch 119. There is.

  One end of the output rod 114 is connected to the power transmission system of the second spray device 101. More specifically, it is connected to the connection arm 121 of a substantially triangular flat plate in a side view. The connection arm 121 is rotatably supported by the delivery drive shaft 105 of the second spray device 101. A second one-way clutch 122 is attached to the delivery drive shaft 105. The elastic force of a torsion coil spring (not shown) acts on the second one-way clutch 122 clockwise (clockwise) in FIG. 13, and the contact arm 123 extending from the second one-way clutch 122 is a connecting arm It abuts on the edge of 121. The second one-way clutch 122 is in a disconnected state with the delivery drive shaft 105 when rotating clockwise (clockwise) in FIG. 13, and the delivery drive when rotating counterclockwise (counterclockwise). It becomes connected with the shaft 105. The connection arm 121 is orthogonal to the delivery drive shaft 105.

  When the connection arm 121 rotates in the counterclockwise direction, the second one-way clutch 122 is rotated in the counterclockwise direction against the elastic force of the torsion coil spring in the connection state with the delivery drive shaft 105. Is turned counterclockwise. On the other hand, when the connection arm 121 rotates clockwise, the second one-way clutch 122 is rotated clockwise following the connection arm 121 by the elastic force of the torsion coil spring in a disconnected state with the feeding drive shaft 105 .

  As described above, one end of the output rod 114 is interlocked and connected to the delivery drive shaft 105 which is a part of the power transmission system of the second scattering device 101 via the connection arm 121 and the second one-way clutch 122 There is.

  The flat counter arm 115 is swingably supported in the front-rear direction with a swing shaft 124 extending in the left-right direction as a support shaft. The swinging shaft 124 is fixed to a connection bracket of a parallel link mechanism 126 described later. The counter arm 115 is connected to the delivery drive shaft 90 of the first spreader device 85 via the gear case 96, the intermediate drive shaft 97, the delivery drive shaft 105 of the second spreader device 101, and the swing shaft 124. And both are orthogonal to each other. The other end of the input rod 112, the other end of the output rod 113, and the other end of the output rod 114 are connected to the counter arm 115.

  The counter arm 115 is disposed between the first spray device 85 and the second spray device 101. The input rod 112 extends vertically from the output shaft of the crank 56 to connect to the counter arm 115, the output rod 113 extends forward from the counter arm 115 to connect to the connection arm 118, and the output rod 114 is connected to the counter It extends rearward from the arm 115 and is connected to the connection arm 121.

  The other end of the input rod 112 is connected to the lower end of the counter arm 115. The other end of the output rod 113 and the other end of the output rod 114 are connected to the counter arm 115 above a virtual line (not shown) passing through the other end of the input rod 112 and the swing shaft 124.

  The other end of the output rod 114 is connected to the counter arm 115 above the other end of the output rod 113. The upper part of the counter arm 115 to which the other end of the output rod 114 is connected is the right side relative to the lower part of the counter arm 115 to which the other end of the input rod 112 and the other end of the output rod 113 are connected It is offset to the back side). The output rod 113 is orthogonal to the intermediate drive shaft 97, and the output rod 114 is orthogonal to the delivery drive shaft 105. The upper portion of the counter arm 115 is located substantially on the same vertical plane as the connection arm 121 and is not shifted in the left-right direction. Further, the lower part of the counter arm 115 is positioned substantially on the same vertical plane as the connection arm 118 and is not shifted in the left-right direction.

  In the distribution power transmission mechanism 111 configured as described above, when the crank 56 rotates, the input rod 112 moves up and down, and the two output rods 113 and 114 move back and forth. The intermediate drive shaft 97 interlocked with and connected to the output rod 113 via the connection arm 118 and the first one-way clutch 119 rotates intermittently, and power is transmitted to the first spray device 85. Further, the delivery drive shaft 105 interlocked and connected to the output rod 114 via the connection arm 121 and the second one-way clutch 122 rotates intermittently, and power is transmitted to the second spray device 101.

  More specifically, when the input rod 112 moves upward, the counter arm 115 swings counterclockwise forward, the output rod 113 is pushed forward, and the output rod 114 is pulled forward. At this time, the connection arm 118 is rotated counterclockwise, and the first one-way clutch 119 is rotated with the connection arm 118 by the elastic force of the torsion coil spring in a disconnected state with the intermediate drive shaft 97. Ru. On the other hand, when the connection arm 121 rotates counterclockwise, the second one-way clutch 122 is rotated counterclockwise against the elastic force of the torsion coil spring in the connection state with the delivery drive shaft 105, and the delivery drive shaft 105 is rotated counterclockwise.

  In addition, when the input rod 112 moves downward, the counter arm 115 pivots rearward in the clockwise direction, the output rod 113 is pulled rearward, and the output rod 114 is pushed rearward. At this time, the connection arm 118 is rotated clockwise, and the first one-way clutch 119 is rotated clockwise against the elastic force of the torsion coil spring in the state of connection with the intermediate drive shaft 97, and the intermediate drive shaft 97 is rotated. It is turned clockwise. On the other hand, the connection arm 121 is rotated clockwise, and the second one-way clutch 122 is rotated clockwise following the connection arm 121 by the elastic force of the torsion coil spring in a disconnected state with the feeding drive shaft 105.

  That is, when the input rod 112 moves upward, the scattering power transmission mechanism 111 transmits power only to the second scattering device 101, and when the input rod 112 moves downward, the first scattering is performed. It is configured to transmit power only to the device 85.

  Here, the dispersion power transmission mechanism 111 has a simple configuration including three rods and one arm, and inputs one input from the planting unit 20 to the first distribution device 85 and the second distribution device 101. It can be distributed to two outputs and has good productivity.

  In addition, the spraying power transmission mechanism 111 can easily connect and disconnect the power from the planting unit 20 to the first spraying device 85 and the second spraying device 101. The connection between the input rod 112 and the three rods of the two output rods 113 and 114 need only be disconnected and connected, for example, to disconnect the power to the first spray device 85, the connection of the output rod 113 may be disconnected. What is necessary is just to cut off the connection of the output rod 114 in order to cut off the power to the second spray device 101. Also, to disconnect the power to the first sprayer 85 and the second sprayer 101, the connection of the input rod 112 may be disconnected, which can be facilitated by the quick joint 116.

  Further, since the two output rods 113 and 114 extend symmetrically in the forward and backward directions, the dispersion power transmission mechanism 111 can perform balanced power transmission, and can reduce backlash and vibration.

  Further, since the distribution power transmission mechanism 111 is configured to transmit power to only one of the power transmission systems of the first distribution device 85 and the second distribution device 101, that is, alternatively, the distribution is performed. The driving load of the first spray device 85 and the second spray device 101 can be prevented from being simultaneously applied to the power transmission mechanism 111, and the durability is improved, and the first spray device 85 and the second spray device 101 It can be driven well.

  The two output rods 113 and 114 transmit power to the power transmission system of the first spray device 85 or the second spray device 101, respectively, when they are pulled forward or backward by the counter arm 115, respectively. Therefore, not the compressive force but the tensile force acts on the two output rods 113 and 114, so the two output rods 113 and 114 are not easily deformed, and the durability is improved.

  Here, the first distribution device 85 is configured to drive the four delivery rolls 93 by the power from the distribution power transmission mechanism 111. On the other hand, the second spraying device 101 is configured to drive one delivery roll 106 by the power from the spraying power transmission mechanism 111. Therefore, the load applied to the distribution power transmission mechanism 111 is larger when power is transmitted to the first distribution device 85 than to the power distribution to the second distribution device 101. The input rod 112 is pushed upward by the crank 56 when transmitting power to the second spreading device 101, and is moved downward by the crank 56 when transmitting power to the first spreading device 85. It is pulled. Therefore, since the force acting on the input rod 112 is smaller in compressive force than the tensile force, the input rod 112 is less likely to be deformed, and the durability is improved.

  Here, the counter arm 115 has a mounting hole 125 to which the other end of the input rod 112, the other ends of the two output rods 113 and 114, and the other end of another output rod can be connected. The distance from the swinging shaft 124 which is the swinging support shaft of the counter arm 115 to the mounting hole 125 is the other end of the input rod 112 or the two outputs from the swinging shaft 124 which is the swinging support shaft of the counter arm 115 This is different from the distance to the other end of the rods 113 and 114. That is, the counter arm 115 is configured to be able to change the distance from the swing shaft 124 to the other end of the input rod 112 and the other ends of the two output rods 113 and 114. Therefore, the power to be distributed to the first spray device 85 and the second spray device 101 can be easily adjusted, and the power can also be distributed to other devices, which is convenient.

  In addition, the other end of the input rod 112 is connected to the lower end portion of the counter arm 115 so that the length is short, and the input rod 112 is not easily deformed and the durability is improved.

  Here, the power transmission system of the first distribution device 85 includes a first metering device (not shown) that changes the position of the contact arm 120 extending from the first one-way clutch 119 with respect to the edge of the connection arm 118 Is also provided. Similarly, in the power transmission system of the second spreading device 101, a second metering device (not shown) or the like that changes the position of the contact arm 123 extending from the second one-way clutch 122 with respect to the edge of the connection arm 121 Will also be placed. The first metering device can adjust the amount of rotation of the first one-way clutch 119 with respect to the amount of rotation of the connection arm 118, and can adjust the power to the first distribution device 85. Further, the amount of rotation of the second one-way clutch 122 relative to the amount of rotation of the connection arm 121 can be adjusted by the second metering device, and the power to the second scattering device 101 can be adjusted. it can.

  The spraying power transmission mechanism 111 is not limited to the above-described configuration. The scattering power transmission mechanism 111 is swingable with an input rod 112 whose one end is connected to the power transmission system of the planting unit 20, output rods 113 and 114 whose one ends are connected to the power transmission systems of a plurality of devices, The other end of the input rod 112 and the other end of the plurality of output rods 113 and 114 may be connected to the counter arm 115. For example, the distribution power transmission mechanism 111 may be configured to distribute power to three power transmission systems. The upper part of the counter arm 115 may not be offset in the left-right direction with respect to the lower part. Further, in the counter arm 115, a plurality of arms extend in the radial direction from the outer periphery of the cylindrical member swingably supported by the swing shaft 124, and the other ends of the input rod 112 and the output rods 113 and 114 in each arm. May be connected. The connection portions with the other ends of the input rod 112 and the output rods 113 and 114 are preferably located on the same plane, and it is difficult for twisting to occur when rocking. In addition, the counter arm 115 may have a plurality of attachment holes 125 or may have a configuration without the attachment holes 125. Further, although the above-described distribution power transmission mechanism 111 is configured to intermittently transmit power using the first one-way clutch 119 and the second one-way clutch 122, it continuously transmits power using a crank or the like. May be configured.

  Next, the parallel link mechanism 126 which connects the 1st spraying apparatus 85 as a 1st working part and the 2nd spraying apparatus 101 as a 2nd working part in the rear part of the planting part 20 is demonstrated. FIG. 14 is a schematic plan view showing one example of the parallel link mechanism 126, FIG. 15 is a schematic side view showing one example of the support portion 134 of the support frame 133, and FIG. It is the schematic side view in which an example of 140 was shown. In addition, in FIG. 14, the seedling loading stand 21, the 1st spraying apparatus 85, and the 2nd spraying apparatus 101 are shown with a dashed-two dotted line, and description of the planting apparatus 22 or the mud cover 138 mentioned later etc. is abbreviate | omitted ing.

  The parallel link mechanism 126 is a parallel link mechanism having an axis extending in the vertical direction as a support axis, and a cylindrical open frame 127 extending in the left and right direction, a rectangular cylindrical pedestal frame 128 extending in the horizontal direction, and a rectangular cylindrical shape. The two link arms 129a and 129b are equal in length. In the open frame 127, one end of the two link arms 129a and 129b, and the end on the side of the first spreader 85 and the second spreader 101 can be pivoted about an axis extending in the vertical direction as a support axis Connected to The pedestal frame 128 is rotatably coupled at the other end of the two link arms 129a and 129b, and the end on the planting unit 20 side is pivotable about an axis extending in the vertical direction.

  In the open frame 127, a square tubular front frame 130 extending in the left-right direction and a square tubular rear frame 131 extending in the left-right direction are intervened via three flat connecting frames 132a, 132b, 132c extending in the longitudinal direction. It is connected.

  And the open frame 127 is latched by the planting part 20 at the time of driving | running | working including the time of the planting work etc. of a seedling. More specifically, the open frame 127 is locked to a support frame 133 or the like fixed to the planting transmission case 28. Support frames 133a, 133b, 133c, and 133d extending upward from the upper surface are fixed to the four planting transmission cases 28a, 28b, 28c, and 28d, respectively. As shown in FIGS. 15 and 16, the two support frames 133a and 133b located on the left side respectively have a support portion 134 in which the rear portion of the upper end is cut out in a substantially L shape inclined rearward in a side view. Have. A roller made of hard resin is attached to a lower rear portion of the support portion 134 so as to be rotatable about an axis in the left-right direction.

  A rectangular cylindrical pedestal frame 128 is fixed to the upper part of the two support frames 133c and 133d located on the right side so as to be bridged. The right end portion of the pedestal frame 128 protrudes rearward, and at the rear end portion, has a support portion 134 similar to the support portion 134 of the support frames 133a and 133b. A roller 135 made of hard resin is rotatably mounted on the lower end of the support portion 134 formed at the right end portion of the pedestal frame 128 in the left-right direction, as with the other support portions 134. Further, at the right end portion of the pedestal frame 128, a regulating protrusion 170 projecting upward is formed. When the link arm 129 is rotated, the restriction protrusion 170 abuts on the link arm 129 to restrict the amount of rotation.

  The cylindrical open frame 127 is supported so as to be placed on the three supports 134. At this time, the cylindrical open frame 127 abuts on two portions of the support portion 134 and the roller 135. The leftmost support frame 133a has a locking lock 137 which engages with an engagement flange 136 projecting upward from the open frame 127 to lock the open frame 127 to the support frame 133a. The locking lock 137 can lock the open frame 127 to the support portion 134 of the support frame 133a by the elastic force of a spring (not shown), and is a so-called patch lock. The locking lock 137 is also disposed at the right end of the pedestal frame 128.

  The locking lock 137 only needs to lock the open frame 127 to the support portion 134 of the support frame 133a, and the configuration, arrangement, number, and the like thereof are not limited. For example, the locking lock 137 may be configured to lock the open frame 127 to the support portion 134 simply by a hook or the like without using the elastic force of a spring.

  The open frame 127 has a mud-proof cover 138 (see FIG. 10) covering the upper side of the planting device 22, a substantially gate-like grip portion 139 in plan view projecting backward, and an open frame 127 as a support frame 133b. , And two connection brackets 141a and 141b to which the link arm 129 is connected, and two shielding covers 142 and 142. Further, the open frame 127 is also attached with a not-shown locking device or the like for operating the locking clutch 52 disposed inside the planting transmission case 28.

  The mud cover 138 blocks mud splashes upward when the planting device 22 is activated, and is disposed above the planting device 22 and opened through the bracket 143 as shown in FIG. It is supported by the frame 127. The configuration and arrangement of the mud cover 138 are not particularly limited. For example, the mud cover 138 may be fixed to the support frame 133. However, from the viewpoint of the maintainability of the planting device 22, it is preferable to be attached to the open frame 127 or the like on the side of the first spray device 85 and the second spray device 101.

  The grip portion 139 is gripped by the operator when moving the open frame 127 back and forth, and is disposed near the left side of the center of the open frame 127 in the left-right direction and in the vicinity of the connection bracket 141a. . The configuration and arrangement of the gripping portion 139 are not particularly limited. For example, it may be disposed on the front frame 130 or the rear frame 131 connected to the open frame 127. However, from the viewpoint of strength and operability, it is preferable to be disposed on the open frame 127, and preferably in the vicinity of the connection bracket 141 to which one end of the link arm 129 is connected.

  The lock-up lock 140 firmly holds the open frame 127 against the support frame 133 b by back and forth force and vertical force. The lockup lock 140 is disposed on the open frame 127 near the support frame 133b. The clamp lock 140 has a cylindrical penetrating shaft 144 radially penetrating the open frame 127, a rod-like handle 145 connected to one end of the penetrating shaft 144, and a plate-like member attached to the other end of the penetrating shaft 144. It comprises a biasing plate 146, a guide plate 147 attached to the open frame 127, an abutment portion 148 fixed to the open frame 127, and the like. The lock-up lock 140 engages with the receiving portion 149 fixed to the support frame 133 b to lock the open frame 127 to the support frame 133 b.

  The cylindrical through shaft 144 is inserted into a through hole that penetrates the open frame 127 in a radial direction that is inclined approximately 45 degrees with respect to the horizontal surface in a side view, and is supported rotatably relative to the open frame 127 . The cylindrical through shaft 144 is inclined downward approximately 45 degrees toward the front in a side view. The rear end portion of the through shaft 144 is positioned above the open frame 127, and the handle 145 is connected.

  The handle 145 has a grip 150 gripped by the operator at one end. The other end of the handle 145 is bifurcated in the left-right direction (the front side and the back side with respect to the paper surface in FIG. 16) so as to sandwich the rear end of the through shaft 144. The other end of the handle 145 is rotatably coupled to the rear end of the through shaft 144 with the handle shaft 151 extending in the left-right direction (radial direction of the through shaft 144) as a support shaft.

  Here, in the side view, the edge on the front side of the other end of the handle 145 is the one end side from the intersection point P with the imaginary line L1 extending parallel to the penetration axis 144 through the handle shaft 151 (the grip 150 Contact surface 152 linearly extending toward the side), a corner surface 153 extending from the intersection point P to an arc opposite to the side of the one end portion, and the other end of the handle 145 connected with the corner surface 153 And an apical surface 154. The abutting surface 152 is orthogonal to the handle shaft 151 and the tip end surface 154. The distance d3 between the handle shaft 151 and the corner surface 153 and the distance d4 between the handle shaft 151 and the tip end surface 154 are smaller than the distance d5 between the handle shaft 151 and the contact surface 152.

  A screw (not shown) is formed at the other end of the through shaft 144, and a part is cut away. The biasing plate 146 is a rectangular plate spring formed of spring steel and extending in the left-right direction (the front side and the back side with respect to the paper surface in FIG. 16). The biasing plate 146 has a through hole (not shown) at the left end corresponding to the cross-sectional shape of the other end of the through shaft 144 which is partially cut away. The biasing plate 146 has the other end of the through shaft 144 inserted through the through hole, is held by two nuts, and is attached to the through shaft 144. The through hole of the biasing plate 146 corresponds to the cross-sectional shape of the other end of the through shaft 144 which is partially cut away, and the rotation of the biasing plate 146 with respect to the through shaft 144 is restricted. .

  A guide plate 147 formed by bending a plate-like member is attached to the open frame 127. The guide plate 147 has a through hole (not shown) into which the through shaft 144 is inserted. The guide plate 147 has a flat guide portion 155 in which the through hole is formed and in close contact with the contact surface 152 of the handle 145. The guide portion 155 is interposed between the open frame 127 and the handle 145.

  The contact portion 148 formed by bending the plate-like member in a substantially L shape in a side view has a vertical contact portion 156 extending in the vertical direction and a horizontal contact portion 157 extending in the horizontal direction. The contact portion 148 is fixed to the open frame 127. The vertical contact portion 156 of the contact portion 148 is located on the front side of the open frame 127, and the horizontal contact portion 157 is located on the lower side of the open frame 127. The contact portion 148 is located in the vicinity of the right side of the through shaft 144 (the back side with respect to the paper surface in FIG. 16).

  A receiving portion 149 formed by bending the plate-like member in a substantially U shape inclined rearward in a side view is fixed to the left side portion of the support frame 133 b. The receiving portion 149 extends in the vertical direction, and the vertical receiving portion 158 with which the vertical contact portion 156 of the contact portion 148 is in close contact from the rear, and the horizontal contact portion 157 of the contact portion 148 in contact with the horizontal contact. And a spring receiving portion 160 which extends in a direction perpendicular to the penetrating shaft 144 and in which the right end of the biasing plate 146 abuts from the lower side. The right end of the biasing plate 146 is in contact with the spring receiving portion 160 in a bent state.

  The push-up lock 140 configured as described above can lock the open frame 127 on the support frame 133 b by the elastic force of the biasing plate 146. The biasing plate 146 is in contact with the through shaft 144 to which the biasing plate 146 is attached, the handle 145, the guide plate 147, and the open frame 127 because the right end abuts against the spring receiving portion 160 in a bent state. The elastic force of the biasing plate 146 acts. The direction of the elastic force of the biasing plate 146 is the axial direction of the through shaft 144 and is the direction from the side of one end where the handle 145 is connected to the side of the other end where the biasing plate 146 is attached. Here, since the through shaft 144 is inclined approximately 45 degrees with respect to the horizontal plane, the elastic force of the biasing plate 146 is distributed substantially equally in the front-rear direction and the vertical direction. Further, the biasing plate 146 is a plate spring and can generate a large elastic force. In addition, the clamping lock 140 can adjust the elastic force of the biasing plate 146 by changing the position of the biasing plate 146 with respect to the through shaft 144 by the two nuts sandwiching the biasing plate 146. It is configured.

  That is, the vertical contact portion 156 extending in the vertical direction of the contact portion 148 fixed to the open frame 127 and the horizontal contact portion 157 extending in the horizontal direction are fixed to the support frame 133 b with substantially the same force. It is pressed against the vertical receiving portion 158 extending in the vertical direction of the portion 149 and the horizontal receiving portion 159 extending in the horizontal direction to be in close contact. And backlash in the front-rear direction is prevented by the close contact between the vertical contact portion 156 extending in the vertical direction and the vertical receiving portion 158. In addition, the vertical shaking is prevented by the close contact between the horizontal abutment portion 157 extending in the horizontal direction and the horizontal receiving portion 159. Therefore, the push-up lock 140 can firmly lock the open frame 127 without rattling the support frame 133 b by the force in the longitudinal and vertical directions.

The locking of the open frame 127 by the clamp lock 140 is released by rotating the handle 145 rearward (clockwise in FIG. 16) with the handle shaft 151 as a support shaft. Although the description by the illustration is omitted, the handle 145 is rotated 90 degrees clockwise with the handle shaft 151 as a support shaft, and the guide portion 155 of the guide plate 147 and the tip end surface 154 of the edge of the other end of the handle 145 are opposed Let Since the distance d4 between the handle shaft 151 and the end surface 154 is smaller than the distance d5 between the handle shaft 151 and the contact surface 152, the distance d4 between the guide portion 155 of the guide plate 147 and the end surface 154 of the handle 145 There is a gap. The through shaft 144 moves to the other end side where the biasing plate 146 is attached by the width of this gap, the deflection of the biasing plate 146 is eliminated, and the elastic force is eliminated.

  Next, the handle 145 is pivoted to the left (front side in FIG. 16) or right (back side in FIG. 16) with the through shaft 144 as a support axis. At this time, together with the handle 145, the through shaft 144 and the biasing plate 146 are also rotated, and the biasing plate 146 is removed from the spring receiving portion 160 of the receiving portion 149, and the open frame 127 is locked by the lifting lock 140. Is released.

  The configuration of the clamp lock 140 is not limited to the above-described configuration as long as the open frame 127 is locked by the force in the front-rear direction and the vertical direction. For example, the buffer between the vertical contact portion 156 of the contact portion 148 and the vertical receiving portion 158 of the receiving portion 149 and between the horizontal contact portion 157 of the contact portion 148 and the horizontal receiving portion 159 of the receiving portion 149 A rubber sheet or the like as a member may be interposed. With such a configuration, rattling of the open frame 127 can be further reduced.

  As described above, the open frame 127 is supported so as to be placed on the support portions 134 formed on the support frame 133 a, the support frame 133 b, and the pedestal frame 128 respectively, and the right end portions of the support frame 133 a and the pedestal frame 128 The planting portion 20 is locked by the lock lock 137 and the lock-up lock 140 provided on each of the two.

The connection bracket 141a is disposed on the open frame 127 in the vicinity of the support frame 133b. On the other hand, the connection bracket 141b is disposed on the open frame 127 in the vicinity of the support frame 133c. Connection bracket 141a, the 141b, respectively link arms 129a, one end of 129b is a connecting shaft 161a, 161 b extending in the vertical direction is rotatably connected to the support shaft. The connection brackets 141a and 141b are composed of two plate members having a substantially pentagonal shape in plan view and fixed to the upper and lower portions of the open frame 127 so as to sandwich the open frame 127. The connection brackets 141a and 141b are rotatably supported so as to sandwich one end of the link arms 129a and 129b. Further, the other ends of the link arms 129a and 129b are rotatably connected to the upper surface of the pedestal frame 128 by using connecting shafts 162a and 162b extending in the vertical direction as supporting shafts. The distance between the two connecting shafts 161a and 161b is equal to the distance between the two connecting shafts 162a and 162b, and the two link arms 129a and 129b are arranged in parallel in a plan view.

  In addition, a swing shaft 124 for supporting the counter arm 115 of the above-described spray power transfer mechanism 111 so as to be able to swing back and forth is fixed to the connection bracket 141a positioned in the vicinity of the support frame 133b. Therefore, when power is transmitted to the first spray device 85 and the second spray device 101 by the spray power transmission mechanism 111, a periodic load is applied to the connection bracket 141a, so the open frame 127 vibrates. Cheap. Here, in the vicinity of the connection bracket 141a, that is, the vicinity of the swing shaft 124 which is a vibration source, the open frame 127 is firmly locked to the support frame 133b by the clamp lock 140. Therefore, the vibration of the open frame 127 resulting from the operation of the dispersion power transmission mechanism 111 can be suppressed.

  Further, as shown in FIG. 17, the link bracket 141a is provided with a link rotation lock 163 which regulates the amount of rotation of the link arm 129a. Here, FIG. 17 is a schematic plan view showing an example of the link rotation lock 163, and FIG. 17A shows a state before the rotation of the link arm 129a is restricted, and FIG. 17B shows the link arm 129a. It is a state after the rotation is regulated. The link rotation lock 163 is mainly described in FIG. 17, the description of the rocking shaft 124, the connection frame 132c, and the like is omitted, and the shielding cover 142 is described by a two-dot chain line.

  The link rotation lock 163 is a lock pin 165 inserted into the holding hole 164 which is a circular through hole formed in the connection bracket 141a, a spring (not shown) that biases the lock pin 165 to the link arm 129a, etc. It consists of The locking pin 165 is formed by bending a cylindrical member at a substantially right angle, and one end of the locking pin 165 is inserted into the holding hole 164. A flat lock flange 166 is fixed to the end of the link arm 129a. The lock pin 165 is biased such that one end of the lock pin 165 inserted into the holding hole 164 by a spring abuts on the upper surface of the lock flange 166. The lock flange 166 has a locking hole 167 which is a circular through hole. The diameter of the locking hole 167 is larger than the diameter of the locking pin 165. The locking hole 167 is arranged so that the center coincides with the center of the holding hole 164 when the link arm 129a is pivoted on the connecting shaft 161a until it is orthogonal to the open frame 127 in plan view. ing.

The link rotation lock 163 configured as described above is locked when the locking pin 165 is locked when the link arm 129a is rotated with the connecting shaft 16 1 a as a support shaft until it is orthogonal to the open frame 127 in plan view. It is inserted into the hole 167, and the rotation of the link arm 129a is restricted. The position of the locking hole 167 is appropriately set according to the amount of rotation that regulates the link arm 129a. The link rotation lock 163 is not limited to the above-described configuration as long as the link rotation lock 163 restricts the amount of rotation of the link arm 129a. For example, the lock flange 166 may have a plurality of locking holes 167. With such a configuration, rotation of the link arm 129a can be restricted in a plurality of steps, which is convenient.

  In the vicinity of the connection brackets 141a and 141b of the open frame 127, shielding covers 142 and 142 which respectively cover the gap between the open frame 127 and the link arm 129 from above are attached. The shield cover 142 prevents exposure of the open frame 127 and the link arm 129 in the vicinity of the connecting portion, so that the operator does not carelessly touch it.

The front frame 130 is parallel to the open frame 127 and is disposed in front of and above the open frame 127. Four mounting flanges 168 corresponding to the four spreading units 86 of the first spreading device 85 are formed on the upper surface of the front frame 130 (see FIG. 11). Then, the scattering units 86 are detachably attached to the mounting flange 168, respectively. Also mounted on the top surface of the front frame 130 are the two gear cases 96 of the first spray device 85. Therefore, the first spray device 85 is supported by the front frame 130. The front frame 130 may be configured to support the first spray device 85, and is not limited to the above-described configuration.

  The rear frame 131 is parallel to the open frame 127 and disposed behind the open frame 127. On the upper surface of the rear frame 131, a plurality of mounting plates 169 extending rearward are fixed. Then, the second spray device 101 is attached to the attachment plate 169. More specifically, the spray cover 104 of the second spray device 101 is attached to the mounting plate 169 (see FIG. 10). Therefore, the second spray device 101 is supported by the rear frame 131. In addition, the rear frame 131 should just be a structure which supports the 2nd spraying apparatus 101, and is not limited to the above-mentioned structure.

  The two connection frames 132a and 132b extend forward, upward, and backward from the open frame 127, with the front end fixed to the front frame 130 and the rear end fixed to the rear frame 131. The connection frame 132a is located between the support frames 133a and 133b in plan view, and the connection frame 132b is located between the support frames 133c and 133d in plan view. The connecting frame 132 c extends rearward from the open frame 127, and its rear end is fixed to the rear frame 131. The connection frame 132c is located near the connection bracket 141a in a plan view. The open frame 127, the front frame 130, and the rear frame 131 are connected by three connection frames 132a, 132b, and 132c. Therefore, the first spreading device 85 and the second spreading device 101 are parallel to the parallel link mechanism 126 on the support frame 133 which is the rear of the planting unit 20 and is fixed to the planting transmission case 28 of the planting frame 26. It is integrally attached via.

  The connection frame 132 only needs to be able to connect the open frame 127, the front frame 130, and the rear frame 131, and the configuration, arrangement, number, and the like of the connection frame 132 are not limited. For example, the connection frame 132c is disposed between the support frames 133b and 133c in plan view, and extends forward, upward, and backward from the open frame 127 similarly to the connection frames 132a and 132b, and its tip is fixed to the front frame 130 The rear end may be fixed to the rear frame 131. The connecting frames 132a and 132b may be configured such that the side connected to the front frame 130 and the side connected to the rear frame 131 are formed by different members.

  As shown in FIGS. 18 and 19, the parallel link mechanism 126 configured as described above can horizontally move the first spray device 85 and the second spray device 101 rearward from the planting unit 20 it can. Here, FIG. 18 is a schematic plan view showing an example of a state in which the first spray device 85 and the second spray device 101 are moved backward, and FIG. 19 is a first spray device 85 and It is the schematic side view in which an example of the state which moved the 2nd spraying apparatus 101 back was shown. In addition, in FIG. 18, the seedling loading stand 21, the 1st spreading apparatus 85, and the 2nd spreading apparatus 101, and the shielding cover 142 are shown with a dashed-two dotted line, and description of the planting apparatus 22 or the mud cover 138 etc. It is omitted. Moreover, in FIG. 19, the planting apparatus 22 is shown with the dashed-two dotted line.

  In order to move the first spreader 85 and the second spreader 101 backward from the planting unit 20, first, power transmission from the planting unit 20 to the first spreader 85 and the second spreader 101 Cut off the system. The protective cover 117 attached to the rear end of the planting transmission case 28b is pivoted downward and opened to expose the scattering output shaft 55, the quick joint 116, the crank 56, one end of the input rod 112, and the like. The quick joint 116 separates the side of the input rod 112 of the distribution output shaft 55 from the side of the power transmission shaft 50.

  Next, the locking of the open frame 127 by the locking lock 137 provided on the support frame 133a, the locking lock 137 provided on the right end of the pedestal frame 128, and the tightening lock 140 is released. Then, the open frame 127 is pulled out from the support portions 134 respectively formed on the support frame 133 a, the support frame 133 b, and the pedestal frame 128 by gripping the grip portion 139 and pulling the open frame 127 backward. Move to At this time, for example, the first spray device 85, the second spray device 101, the spray power transmission mechanism 111, the mud cover 138, etc. are also moved backward along with the open frame 127, such as devices connected or supported by the open frame 127. Be done.

  Then, the locking pin 165 of the link rotation lock 163 is inserted into the locking hole 167, and the rotation of the link arm 129a is restricted, whereby the movement of the open frame 127 is stopped. The link arm 129 b abuts on the restriction protrusion 170 formed at the right end of the pedestal frame 128.

  As described above, the open frame 127 attached to the planting unit 20 via the parallel link mechanism 126 can be moved backward. That is, the first sprayer 85 and the second sprayer 101 can be separated rearward from the planting unit 20, and access to the rear of the planting unit 20, particularly to the seedling platform 21 and the planting device 22 Sex is improved. Therefore, maintenance of the rear part of the planting section 20, for example, removal of the seedling mat 98 left on the seedling platform 21 and pulling up, maintenance of the seedling platform 21, folding work of the seedling platform 21, and planting device 22 Maintenance can be performed easily.

  In addition, since the open frame 127 moves horizontally, the operator does not have to move the open frame 127 while supporting or lifting the open frame 127 from the lower side, and the first spraying device can be easily and with less effort. 85 and the second spray apparatus 101 can be moved, and the burden on the operator is small.

  In addition, the open frame 127 does not rotate around an axis extending in the vertical direction with respect to the planting unit 20, and is moved in parallel with the planting unit 20, so the first spraying device 85 And the 2nd spraying apparatus 101 does not move back more than the space spaced apart back from the planting part 20. As shown in FIG. Therefore, the first spreader 85 and the second spreader 101 can be separated rearwardly from the planting section 20 without requiring a large space behind, for example, the space in a warehouse or the like is limited. Even under the circumstances, maintenance of the rear portion of the planting unit 20 can be easily performed.

  Also, the parallel link mechanism 126 is configured to connect the open frame 127 supporting the first spray device 85 and the second spray device 101 to the pedestal frame 128 attached to the planting section 20 by the two link arms 129a and 129b. It is. Therefore, in the parallel link mechanism 126, the weight of the first spreader 85, the second spreader 101 and the like is not concentrated at one place, and the durability is good.

  Also, the parallel link mechanism 126 is provided on the right rear of the planting unit 20. More specifically, the ends on the side of the planting portion 20 of the two link arms 129a and 129b turn to the pedestal frame 128 attached to the planting transmission cases 28c and 28d located on the right side via the support frames 133c and 133d. It is linked in a movable manner. That is, when the first spray device 85 and the second spray device 101 are separated rearward from the planting unit 20, the two link arms 129 a and 129 b are located on the right side of the planting unit 20. Therefore, when performing maintenance on the rear portion of the planting unit 20, the parallel link mechanism 126 (link arms 129a and 129b) is less likely to interfere with maintenance, and maintenance can be easily performed. For example, maintenance of the rear part of the planting part 20 can be performed without moving parallel to the parallel link mechanism 126 (link arms 129a and 129b).

  Further, since the mud cover 138 covering the upper side of the planting device 22 is supported by the open frame 127 via the bracket 143, it is separated rearward from the planting portion 20 together with the open frame 127. Therefore, since the upper part of the planting device 22 is released, maintenance of the planting device 22 can be easily performed.

  Further, in the parallel link mechanism 126, the amount of rotation of the link arm 129a is regulated by the link rotation lock 163. Therefore, the first spraying device 85 and the second spraying device 101 can be stopped at desired positions, which is convenient. In addition, it is possible to reliably prevent the link arm 129b from being excessively rotated by the restriction projection 170, and the first spray device 85 and the second spray device attached to the parallel link mechanism 126 or the parallel link mechanism 126. Damage such as 101 can be prevented.

  In addition, the protective cover 117 that covers the scattering output shaft 55, the quick joint 116, the crank 56, and one end of the input rod 112 is made of resin, and its lower part is pivoted about the planting transmission case 28b in the left-right direction. Since it is freely supported, it is possible to prevent the breakage of the input rod 112 due to the non-separation of the scattering output shaft 55. In detail, when the operator moves the open frame 127 backward without separating the side of the input rod 112 of the scattering output shaft 55 from the side of the power transmission shaft 50 by the quick joint 116, the input rod 112 is protected It abuts on the top of the cover 117. However, since the protective cover 117 is made of resin, breakage of the input rod 112 is prevented. Further, when the input rod 112 abuts on the upper portion of the protective cover 117, the engagement between the engaging portion of the planting transmission case 28b and the locking projection of the protective cover 117 is released, and the protective cover 117 rotates to plant The rear end of the transmission case 28b is exposed. By exposing the rear end of the planting transmission case 28b, the operator can be alerted, and damage to the input rod 112 due to further movement of the open frame 127 can be prevented.

  In addition, in order to return the 1st spreading device 85 and the 2nd spreading device 101 to the position of use condition before back movement, it carries out by the reverse procedure to the time of the above-mentioned back movement. The locking pin 165 of the link rotation lock 163 is pulled out of the locking hole 167, and the open frame 127 is pushed forward. Then, the open frame 127 is fitted into the support portions 134 formed on the support frame 133 a, the support frame 133 b, and the pedestal frame 128 respectively. In addition, since the open frame 127 is slightly bent downward due to its own weight and the weight of the first spray device 85 and the second spray device 101, it is necessary to lift the open frame 127 and fit into the support portion 134. Here, a roller 135 rotatably supported is attached to the lower rear of each support portion 134. Therefore, the open frame 127 can be moved on the roller 135 and fitted into the support portion 134, which reduces the burden on the operator.

  Next, the open frame 127 is locked by the locking lock 137 provided on the support frame 133a, the locking lock 137 provided on the right end of the pedestal frame 128, and the tightening lock 140. The quick joint 116 connects the side of the input rod 112 of the spray output shaft 55 to the side of the power transmission shaft 50, and turns the protective cover 117 upward to close it.

  In addition, the parallel link mechanism 126 is not limited to the above-mentioned structure. The parallel link mechanism 126 is a parallel link mechanism having an axis extending in the vertical direction as a support axis, and the first spray device 85 and the second spray device 101 can be moved in the front-rear direction to the rear of the planting portion 20 What is necessary is just a structure to attach. For example, the parallel link mechanism 126 may be a parallel link mechanism including three link arms 129, or may be configured to include a reinforcing arm connecting the link arms 129a and 129b.

  The end of the parallel link mechanism 126 on the planting portion 20 side may be attached to the planting frame 26. For example, the support frame 133 may be fixed to the main frame 27. However, from the viewpoint of productivity and the like, the support frame 133 is preferably fixed to the planting transmission case 28, and the parallel link mechanism 126 can be arranged with a simple structure.

  In addition, the parallel link mechanism 126 may be provided at the center or the left side of the rear portion of the planting portion 20. For example, the configuration may be symmetrical to the above-described parallel link mechanism 126, and the same effect can be obtained. In addition, it is preferable to provide the parallel link mechanism 126 in the rear part of any one of the left-right direction of the planting part 20. As shown in FIG. When performing maintenance on the rear portion of the planting unit 20, the parallel link mechanism 126 (link arms 129a and 129b) is less likely to interfere with maintenance, and maintenance can be easily performed. When one of the left and right directions of the seedling loading stand 21 is configured to be foldable, it is preferable to provide the parallel link mechanism 126 on the side opposite to the unit seedling loading stand 25 to be folded. With such a configuration, the seedling loading table 21 can be easily folded.

  In addition, the parallel link mechanism 126 may be configured such that the two link arms 129a and 129b expand and contract integrally. With such a configuration, the left and right sides of the first spreader 85 and the second spreader 101 when the first spreader 85 and the second spreader 101 are separated from the planting section 20 in the rear direction. The amount of movement in the direction can be reduced, and maintenance in the rear of the planting part 20 can be easily performed even in a narrow space.

  In addition, it is preferable that arrangement | positioning of each member or various apparatuses in the parallel link mechanism 126 is based on the connecting shaft 162b located in the outward side of the left-right direction. By using the connecting shaft 162b as a reference, the number of parts that can be shared can be increased in planting sections with different numbers of planting streaks, for example, planting sections with 8-row planting type and 6-row planting type, and costs can be reduced.

  As described above, in the present embodiment, the planting unit 20, the first spraying device 85 and the second spraying device 101 as a plurality of working units attached to the rear of the planting unit 20, and the planting unit 20 In the rice transplanter 1 provided with the dispersion power transmission mechanism 111 for transmitting power to the first dispersion device 85 and the second dispersion device 101, the dispersion power transmission mechanism 111 has one end to the power transmission system of the planting section 20. Are connected, the output rods 113 and 114 whose one ends are respectively connected to the power transmission system of the first spray device 85 and the second spray device 101, and the counter arm 115 configured to be swingable. And the other end of the input rod 112 and the other end of the output rods 113 and 114 are connected to the counter arm 115, so that the first spray device 85 and the second spray device can be configured with a simple configuration. It is possible to provide the planting machine 1 for distributing power to 01. And while being able to improve productivity, the connection and disconnection of the motive power from the planting part 20 to the 1st spraying device 85 and the 2nd spraying device 101 becomes easy, and the 1st spraying device 85 and the 2nd spraying device Desorption of 101 becomes easy.

  In addition, the some working part in this embodiment should just be attached to the rear part of the planting part 20, and is not limited to the above-mentioned 1st spraying apparatus 85 and the 2nd spraying apparatus 101. FIG. Moreover, the attachment structure to the planting part 20 of the 1st spreading device 85 and the 2nd spreading device 101 is not limited to the above-mentioned parallel link mechanism 126, For example, the 1st spreading device 85 and the 2nd The spraying devices 101 may be separately attached to the planting unit 20, or may be fixed to the planting unit 20.

  The rice transplanter of the present invention can be applied to any rice transplanter equipped with a plurality of working parts attached to the rear of the planting part.

1 rice transplanter 2 traveling machine body 20 planting section 85 first spraying device (first working unit)
101 Second spraying device (second working unit)
111 Scattering power transmission mechanism (power transmission mechanism)
112 input rod 113, 114 output rod 115 counter arm 119 first one-way clutch 122 second one-way clutch

Claims (4)

Planting department,
A plurality of working units attached to the rear of the planting unit;
A power transmission mechanism that transmits power from the planting unit to the plurality of working units;
In the rice transplanter equipped with
The power transmission mechanism is
An input rod whose one end is connected to the power transmission system of the planting section;
A plurality of output rods each having one end connected to a power transmission system of the plurality of working units;
A swingable counter arm,
Have
The other end of the input rod and the other end of the plurality of output rods are connected to the counter arm ,
The plurality of working units are a first working unit and a second working unit disposed behind the first working unit.
The counter arm is disposed between the first working unit and the second working unit and is swingable in the front-rear direction,
The power transmission mechanism, in accordance with the swinging of the counter arm, characterized that you transmit alternatively power to the first work portion or the second working section and the power transmission system, Rice transplanter. The counter arm is configured to be capable of changing a distance from the other end of the output rod to a pivot point of the counter arm.
The rice transplanter according to claim 1. The output rod connected to the power transmission system of the first working unit extends forward from the counter arm and is connected to the power transmission system of the first working unit via a first one-way clutch.
The output rod connected to the power transmission system of the second working unit extends rearward from the counter arm and is connected to the power transmission system of the second working unit via a second one-way clutch. Characterized by
The rice transplanter according to claim 1 or 2 . The power transmission mechanism is
Power is transmitted to the power transmission system of the first working unit when the output rod connected to the power transmission system of the first working unit is pulled backward;
When the output rod connected to the power transmission system of the second working unit is pulled forward, power is transmitted to the power transmission system of the second working unit. The rice transplanter according to claim 3 .

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