JP2005210994A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems wherein, when a driving-side arm is rotated in a reverse direction, a transmission structure to a seedling-delivering body including the driving-side arm or a following-side arm is deformed or damaged, and a risk of deterioration of transplanting performance such as the number of transplanted seedlings and transplanted postures caused by unsuitable amount of the seedlings conveyed to a seedling-taking out port by the malfunction of the seedling-delivering body is present in a seedling transplanter constituted so that the following side arm may be turned by the contact with the rotating driving-side arm, and the rotation is transmitted through the following-side arm to the seedling-delivering body of a seedling-carrying platform. <P>SOLUTION: A swinging fulcrum shaft 95 is installed in a middle part of the following-side arm 90 so that the tip-side part 90b of the contacting arm 90 can be turned and rotated to the contacting side, i.e. in the direction reverse to the transmission for the deliver of the seedling, in the transmission to the seedling-delivering body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention belongs to the technical field of seedling transplanters such as rice transplanters.

  Conventionally, a seedling planting section is mounted on a traveling vehicle body, and a power transmission path for operating a traveling propulsion body of the traveling vehicle body and a seedling planting section for operating a driving propulsion body of the traveling vehicle body at a transmission branch portion by power from a prime mover In a seedling transplanting machine that provides a transmission device that branches to the transmission path and transmits the transmission device that is capable of switching forward and reverse from the transmission branch portion to the transmission upper side, a one-way clutch is provided in the planting transmission path, There is one in which power in the reverse direction is not transmitted to the seedling planting part even if the transmission device is switched to transmit in reverse (see Patent Document 1).

Also, a seedling planting plant comprising a seedling feeding body constituted by a seedling feeding belt for transferring seedlings on the seedling mounting stage to the seedling outlet port side, and a seedling planting device for taking out the seedlings from the seedling outlet port and planting them in the field. Attached to the traveling vehicle body, the power from the prime mover is divided into a traveling transmission path for operating the traveling propulsion body of the traveling vehicle body at the transmission branching section and a planting transmission path for operating the seedling planting section. Seedling transplantation having a structure of branching and transmitting, and having a transmission path that is transmitted to the seedling feeder through a driven arm that rotates by contacting a rotating driving arm on the planting transmission path (See Patent Document 2).
JP 11-346512 A JP 2003-310012 A

  According to the former of the above background art, when switching the transmission device to transmit in reverse and moving the aircraft backward, the one-way clutch prevents the reverse power from being transmitted to the seedling planting part, It is possible to prevent the seedling planting part or the seedling from being deformed or damaged due to reverse operation and generating a mechanical lock, or inappropriate seedling planting due to malfunction of the seedling planting part. However, the one-way clutch has an allowable amount of transmission in the reverse direction that the clutch itself has (for example, determined by the size of the clutch engaging portion), and starts rotating in the reverse direction. Some rotational power in the opposite direction is transmitted before the rotational power is cut off.

  At this time, if the seedling planting part has a configuration like the latter of the above background art, the rotating driving side arm makes contact and the driven side arm rotates, so that the short time for contact is reached. In this configuration, the driven arm is slightly rotated to operate the seedling feeding body. Therefore, even if the driving arm is slightly rotated in the reverse direction, the driving arm is driven depending on the timing of starting to rotate in the reverse direction. The side arm normally contacts the driven arm from the opposite side, and for the driven arm, it is likely to rotate in the opposite direction, causing the driving arm or the driven arm to move. Including the number of seedlings and the posture of the seedling, the transmission structure to the seedling feeding body includes deformation and damage, or the seedling feeding body malfunctions and the amount of seedling transferred to the seedling outlet is inappropriate. There is a risk that planting performance such as.

  The present invention has taken the following technical means to solve the above problems.

  That is, the invention according to claim 1 is a seedling provided with a seedling feeding body for transferring a seedling on a seedling mount to a seedling outlet, and a seedling planting device for taking out the seedling from the seedling outlet and planting it in a field. A driving transmission path for operating the seedling planting section and a driving transmission path for operating the traveling propulsion body of the traveling vehicle body with the planting section mounted on the traveling vehicle body and the power from the prime mover at the transmission branch section And a transmission device capable of switching forward / reverse from the transmission branching portion to the transmission upper side, while a rotating drive side arm is in contact with the planting transmission path. In a seedling transplanting machine provided with a transmission path that is transmitted to a seedling feeding body via a rotating driven arm, a swing fulcrum shaft is provided in the middle of at least one of the driving arm and the driven arm. A tip side portion of the arm that comes into contact with the seedling feed body The said side abutting i.e. seedlings feed transmission to the base portion and the swinging rotatably provided seedlings transplanter the opposite side.

  Therefore, in the seedling transplanting machine according to claim 1, by operating the seedling planting part while running the machine body by the traveling propulsion body, the driving side arm rotates and contacts the driven side arm, The driven arm is rotated and transmitted to the seedling feeding body, the seedling feeding body transports the seedling on the seedling mount to the seedling taking-out port, and the seedling planting device takes out the seedling from the seedling taking-out port and puts it in the field. Planting. When the aircraft is moved backward, the transmission device on the upper transmission side is switched from the transmission branching portion to transmit in reverse. At this time, since the driving side arm rotates somewhat in the reverse direction, the driving side arm may come into contact with the driven side arm from the opposite side where the driving side arm normally comes into contact. Since the tip end portion of at least one arm of the driven arm is provided so as to be swingable to the side that normally contacts the base portion in the transmission to the seedling feeding body, that is, the side opposite to the seedling feeding transmission. Only the tip side portion rotates and power is not transmitted to the seedling feeder.

  Therefore, since the seedling transplanting machine according to claim 1 does not transmit any power to the seedling feeding body even when the driving side arm rotates in the reverse direction when the machine moves backward, the driving side arm or the driven side arm is not transmitted. The transmission structure to the seedling feeding body containing the mud causes deformation or damage, or the seedling feeding body malfunctions, resulting in an improper amount of seedling transferred to the seedling removal outlet, It is possible to prevent the planting performance such as the attachment posture from deteriorating.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 and FIG. 2 show a riding type rice transplanter 1 with a fertilizer application. This riding type rice transplanter 1 has a seedling planting portion on the rear side of a traveling vehicle body 2 via a lifting link device 3. 4 is mounted so as to be movable up and down, and a main body portion of the fertilizer applicator 5 is provided on the upper rear side of the traveling vehicle body 2.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 6 and rear wheels 7 which are drive wheels, and a transmission case 8 is disposed at the front of the fuselage. A front wheel final case 9 is provided, and a front wheel 6 is attached to a front wheel axle that protrudes outward from a changeable front wheel support portion 9a of the front wheel final case 9. Further, the front end portion of the main frame 10 is fixed to the rear portion of the transmission case 8, and the rear wheel gear case 12 is supported by a rear wheel rolling shaft 11 provided horizontally at the front and rear left and right center portions of the main frame 10. The rear wheel 7 is attached to a rear wheel axle that is supported in a freely rolling manner and projects outward from the rear wheel gear case 12.

  The engine 13 serving as a prime mover is mounted on the main frame 10, and the hydraulic power is continuously moved forward and backward as a transmission device in which the rotational power of the engine 13 can be switched between forward and reverse via the first belt transmission device 14. Input to the transmission (HST) 15. The output from the forward / reverse continuously variable transmission (HST) 15 is transmitted to the transmission case 8 via the second belt transmission 16. The rotational power transmitted to the mission case 8 is branched and transmitted to the traveling transmission path and the planting transmission path by the transmission branching portion 8a in the case 8, and separated into the traveling power and the externally extracted power. It is. A part of the traveling power is transmitted to the front wheel final case 9 to drive the front wheel 6, and the rest is transmitted to the rear wheel gear case 12 to drive the rear wheel 7. Further, the external take-out power is transmitted to the planting clutch case 18 provided at the rear part of the traveling vehicle body 2 through the take-out transmission shaft 17, and then transmitted to the seedling planting unit 4 through the planting transmission shaft 19, and fertilizer is applied. It is transmitted to the fertilizer application 5 by a transmission mechanism (not shown).

  The upper part of the engine 13 is covered with an engine cover 20, and a seat 21 is installed thereon. A bonnet 22 incorporating various operation mechanisms is provided in front of the seat 21, and a handle 23 for steering the front wheel 6 is provided above the bonnet 22. A forward / reverse transmission lever 24 for operating the forward / reverse continuously variable transmission (HST) 15 is provided on the right side of the seat 21. Further, in the vicinity of the handle 23, there is provided a planting raising / lowering operation lever 25 for performing the raising / lowering operation of the seedling planting unit 4 and the on / off operation. The engine cover 20 and the bonnet 22 have horizontal floor steps 26 on the left and right sides of the lower end. In addition, on the left and right sides of the front part of the traveling vehicle body 2, a spare seedling stage 27 on which supplementary seedlings are placed is provided.

The configuration in the planting clutch case 18 will be described. An input shaft 30 to which power from the take-out transmission shaft 17 is input from the front side of the planting clutch case 18 and a planting clutch shaft 32 to be transmitted to the planting clutch 31 are front and rear. An inter-variety transmission gear unit 33 is provided that includes a plurality of gear pairs that are provided in parallel to each other and that are transmitted from the input shaft 30 to the planting clutch shaft 32. A slide key 34 is provided on the input shaft 30 for selecting which gear of the plurality of gears on the input shaft 30 side of the inter-variety transmission gear portion 33 is to be rotated integrally with the input shaft 30, and the slide key 34 is moved forward and backward. By operating, the transmission ratio from the input shaft 30 to the planting clutch shaft 31 is switched to switch between planting strains by the seedling planting unit 4. A stock shift shifter 35 for operating the slide key 34 is provided on the input shaft 30 portion in front of the stock shift gear portion 33. A safety clutch 36 is provided on the portion of the planting clutch shaft 32 facing the inter-strain shift shifter 35, and stones are bitten by the safety clutch 36 in the operation of a seedling planting device 37 described later of the seedling planting unit 4. If the planting clutch shaft 32 has a driving load to the extent that it is determined that a mechanical lock has occurred, the transmission is cut off. The load that the safety clutch 36 can cut is adjusted by rotating an adjustment nut 37 provided on the planting clutch shaft 32 that protrudes from the front side of the planting clutch case 18 so as to rotate integrally with the adjustment nut 37. The safety clutch spring receiving plate 39 screwed to the outer surface of the adjustment shaft 38 is moved back and forth via the adjustment shaft 38, and the compression load of the safety clutch spring 40 is changed. Since this safety clutch 36 is arranged on the front side of the inter-gear transmission gear portion 33, the planting transmission shaft 19 can be configured to be long, and a shaft coupling (not shown) that can be bent to follow the raising and lowering of the seedling planting portion 4. The bending angle range of the shaft coupling can be reduced in the planting transmission shaft 19 provided with the above, and the transmission efficiency by the planting transmission shaft 19 can be maintained well. Conventionally, since the safety clutch 36 is arranged at the rearmost part of the planting clutch case 18 on the rear side of the inter-gear transmission gear unit 33, the planting transmission shaft 19 is shortened correspondingly, and the bending angle is increased. May not be able to transmit.

  Note that the planted transmission shaft 33 is transmitted from the gear on the planting clutch shaft 32 side to the safety clutch 36 via the cylindrical shaft 41 fitted on the planting clutch shaft 32, and the planting clutch shaft is transmitted from the safety clutch 36. It is configured to be transmitted to a planting clutch 31 provided on the rear side of the inter-strain transmission gear portion 33 via 32. The planting clutch 31 includes a front drive clutch body 42 and a rear passive clutch body 43. The plantation clutch shifter arm 44 rotates the drive clutch body 42 along the planting clutch shaft 32. In this configuration, the transmission is turned on and off. The passive clutch body 43 is configured by a member integral with the output shaft 45 protruding from the rear side of the planting clutch case 19 on the extension line of the planting clutch shaft 32, and is configured to transmit from the output shaft 45 to the planting transmission shaft 19. It has become. By rotating the planting clutch shifter arm 44, the fixed position stopping arm 46 that rotates integrally with the planting clutch shifter arm 44 is rotated by the rotation of the planting clutch shaft 32 and the output shaft 45. If it comes to the position which engages with the engagement groove | channel 43a provided in this, the planting clutch shifter arm 44 will further rotate, and it has the structure which can move the drive clutch body 42 to the non-transmission position to the front side. Therefore, the planting clutch 31 is a fixed position stop clutch.

  The planting clutch shifter arm 42 is operated by driving an electric planting clutch motor 47 provided on the left side (inner side in the left-right direction of the machine body) of the planting clutch case 18. The planting clutch motor 47 is attached to a motor bracket 49 fixed to the planting clutch case 18 by a bolt 48, and the pinion 50 of the planting clutch motor 47 is engaged with a shifter gear 52 that rotates integrally with the planting clutch shifter arm shaft 51. It has become. A transmission detection switch 54 and a non-transmission detection switch 55 for detecting the transmission state and non-transmission state of the planting clutch 31 by detecting the projection 53a of the cam plate 53 that rotates integrally with the planting clutch shifter arm shaft 51 are provided in the motor bracket 49. Is attached. By the way, the planting clutch case 18 is attached by bolts 57 to a mounting frame 56 that extends outward (right side) from the left and right center of the body. Therefore, the bolt 57 can be removed and the planting clutch case 18 together with the planting clutch motor 47 can be attached to and detached from the machine body. Can be easily maintained, and the accuracy of the positional relationship between the planting clutch motor 47 and the planting clutch shifter arm 44 can be improved, so that the planting clutch 31 can be operated with high accuracy and stability. .

The drive clutch pawl 58 and the passive clutch pawl 59 of the planting clutch 31 have shapes as shown in FIG. That is, the end surface 59a of the passive clutch pawl 59 in the direction of the planting clutch shaft 32 is in the direction of clutch rotation, whereas the end surface 58a of the drive clutch pawl 58 in the direction of the planting clutch shaft 32 has a large depth on the clutch forward rotation side. As shown, the inclined surface is inclined (so that the end surface 58b on the clutch forward rotation side becomes larger). When the fixed position stopping arm 46 is not engaged with the engagement groove 43a and is in contact with the outer periphery of the passive clutch body 43, as shown in FIG. Part of the end face on the side overlaps and engages, but the end face on the reverse side does not overlap and does not engage, and even if the drive clutch body 42 is reversely rotated, the inclined surface 58a of the drive clutch pawl 58 causes reverse rotation transmission. It can be suppressed. Therefore, the planting clutch 31 also serves as a one-way clutch that can immediately suppress reverse transmission in conjunction with the reverse operation of the aircraft. When the forward / reverse shift lever 24 is operated to the reverse side, the planting clutch motor 47 is operated on the non-transmission side of the planting clutch 31, and the reverse rotation is inhibited. In this state, when the drive clutch body 42 is reversed, the inclined surface 58a of the drive clutch pawl 58 comes into contact with the passive clutch pawl 59, so that the transmission in the reverse direction may be slightly transmitted to the passive clutch pawl 59. On the other hand, when the fixed position stop arm 46 is engaged with the engagement groove 43a, the end faces of the clutch claws 58 and 59 do not overlap on the forward rotation side and the reverse rotation side as shown in FIG. The state is not engaged, and the passive clutch body 43 stops at a predetermined phase. In addition, since the drive clutch body 42 is rotated forward by advancing the machine body after turning off the operation of the seedling planting portion 4 with the planting raising / lowering operation lever 25, the fixed position is stopped. Accordingly, in the operation for turning off the operation of the seedling planting part 4 before the turning at the normal operation, the aircraft continues to advance in the turning stroke, and eventually the fixed position is stopped. In the normal transmission state in which the planting clutch motor 47 is operated to the transmission side of the planting clutch 31, the end surfaces of the clutch claws 58 and 59 are overlapped and reliably engaged on both the forward and reverse sides. Become.

  The inter-strain transmission gear unit 33 is configured to be transmitted at an inconstant speed by an eccentric gear depending on the set strains in order to optimize the operation of the seedling planting device 37 of the seedling planting unit 4. A planting clutch 31 that also serves as an anti-reverse clutch is provided on the lower side. Therefore, if a one-way clutch that always suppresses reverse rotation transmission is provided on the lower transmission side of the inter-shaft transmission gear portion as in the prior art, the passive clutch body is driven by the pulsation of the drive clutch body due to the unequal speed transmission of the inter-shaft transmission gear portion. There is a possibility that the seedling planting device rotates inappropriately with respect to the clutch body, and the operation of the seedling planting device becomes inappropriate and the seedling planting posture becomes inappropriate. However, with the above configuration, in the normal transmission state, the end surfaces of the clutch claws 58 and 59 are in a state of being reliably engaged with each other on both the forward rotation side and the reverse rotation side, so that the seedling planting device 37 operates properly. Can be planted properly.

  A fertilizer clutch 60 is provided on the input shaft 30 portion facing the planting clutch 31, and is transmitted from the input shaft 32 to the fertilizer output shaft 61 provided on the extension line of the input shaft 30 via the fertilizer clutch 60. It is configured to transmit to a fertilizer feeding portion 63 (to be described later) of the fertilizer application device 5 through a crank arm 62 that rotates integrally with the output shaft 61. The passive clutch body 64 of the fertilizer application clutch 60 is formed of a member integrated with the fertilizer output shaft 61, as with the planting clutch 31.

  The lift link device 3 includes a single upper link 70 and a pair of left and right lower links 71. The links 70 and 71 are pivotally attached to a rear-view portal-shaped link base frame 72 erected on the rear end of the main frame 10 on the base side, and a vertical link 73 is connected to the tip side. . And the connecting shaft 74 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 73, and the seedling planting part 4 is connected so that rolling is possible centering | focusing on the connecting shaft 74. An elevating hydraulic cylinder 76 is provided between a support member fixed to the main frame 10 and a distal end portion of a swing arm 75 integrally formed with the upper link 70, and the upper link 70 is expanded and contracted by hydraulic pressure. Rotates up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has an eight-row planting structure, a transmission case 77 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlet 78 of each row one by one and for one horizontal row When all the seedlings are supplied to the seedling outlet 78, the seedling mount 80 for transferring the seedlings downward by the seedling feeding belt 79, and the seedling planting device for planting the seedlings supplied to the seedling outlet 78 in the field with the seedling planting tool 37a. 37 etc.

  The seedling mounting table 80 is supported on the back side of the seedling mounting surface so as to be movable in the left-right direction along a horizontal frame 81 provided in the left-right direction at the bottom of the back surface side. The horizontal frame 81 is provided with eight seedling outlets 78. A laterally moving rod 82 that protrudes from both the left and right sides of the transmission case 77 and reciprocates left and right with the power in the transmission case 77 is provided, and a connecting member 83 and a seedling stage 80 fixed to both ends of the laterally moving rod 82 are provided. They are connected so that the horizontal moving rod 82 reciprocates left and right so that the seedling stage 80 reciprocates left and right.

  The seedling feeding belt 79 is stretched around a driving roller 84 and a driven roller 85. The drive roller 84 is provided so as to rotate integrally with the seedling feed drive shaft 86 in the left-right direction. The seedling feeding drive shaft 86 is configured to transmit rotation only in the direction in which the seedling feeding belt 79 feeds the seedling by the ratchet mechanism 87.

  The drive mechanism of the seedling feeding belt 79 has the following configuration. That is, drive side arms 88 that project from the left and right sides of the transmission case 77 to rotate are provided. A relay shaft 89 in the left-right direction is provided above the seedling feed drive shaft 86, and a driven arm 90 is attached thereto. The relay shaft 89 and the seedling feed drive shaft 86 are connected in transmission by a link mechanism 94 including arms 91 and 92 and a link 93.

  When the seedling stage 80 reaches the end of the left-right movement stroke, the driving side arm 88 comes into contact with the driven side arm 90 from the lower side to rotate the relay shaft 89 by a predetermined angle. The rotation is transmitted to the seedling feed drive shaft 86 via the link mechanism 94 and the ratchet mechanism 87. Thereby, the seedling feeding belt 79 operates by a predetermined amount. In addition, two driven arms 90 are provided on the same relay shaft 89 on the left and right sides with respect to one driving arm 88 so that the seedling mounting table 80 can transmit seedling feeding power at both ends of the right and left movement. It has been. When the driving side arm 88 moves away from the driven side arm 90, the relay shaft 89 and the driven side arm 90 return to the positions before driving by the tension of the spring 96 locked to the swing fulcrum shaft 95 described later. The relay shaft 89 and the driven arm 90 are configured to return to a position where the stopper 97 provided at the end of the relay shaft 89 comes into contact with the restriction member 98 on the seedling stage 80 main body side by the tension of the spring 96. Yes.

  By the way, the seedling feed drive shaft 86 is divided into a left four-line portion and a right four-line portion. The relay shaft 89 is also divided into a left relay shaft and a right relay shaft. In correspondence with the left and right seedling feed drive shafts 86 and the relay shafts 89, a drive side arm 88, a link mechanism 94, and two left and right driven side arms 90 are provided on the left and right sides, respectively.

  In the driven arm 90, a base portion 90a near the center of rotation and a rotating tip end portion 90b with which the driving arm 88 abuts are configured separately, and both portions 90a and 90b are provided in the middle of the arm 90. Are connected by a oscillating fulcrum shaft 95 in the direction. The base portion 90 a is configured to rotate integrally with the relay shaft 89, and the rotating tip side portion 90 b is provided with a swing fulcrum shaft 95 by a torque spring (not shown) provided on the swing fulcrum shaft 95. It is biased in a direction to rotate upward (opposite to the side in contact with the transmission to the seedling feeding belt 79), and normally contacts the relay shaft 89 so as not to rotate further upward. Therefore, at the time of normal seedling feeding transmission in which the driving side arm 88 contacts the driven side arm 90 from below, the base portion 90a and the rotating tip side portion 90b of the driven side arm 90 are integrally formed around the relay shaft 89. Rotate upward. On the other hand, when the driving side arm 88 is reversed and comes into contact with the driven side arm 90 from the upper side, only the rotating tip side portion 90b comes into contact with the base portion 90a on the lower side (in transmission to the seedling feeding belt 79). To the side) against the torque spring.

Further, the reverse amount of reverse rotation from when the drive clutch body 42 of the planting clutch 31 starts to rotate in reverse until the rotational power in the reverse direction is cut off depends on the angle of the inclined surface 58a of the drive clutch pawl 58 or the length in the rotation direction. Assuming that it rotates, even if the driving side arm 88 starts to reversely rotate from the rotational position immediately after being transmitted to the driven side arm 90 (the state of FIG. 9A), the rotational angle of the driving side arm 88 is the driven side. The lengths of the driven side arm 90 and the driving side arm 88 are set so as not to get over the tip side portion 90b of the arm 90 and to be positioned below the portion 90b (the state shown in FIG. 9B). Accordingly, the seedling feeding belt 79 is prevented from being fed twice by the drive side arm 88 being positioned below the driven side arm 90 and operating again in the forward rotation direction. This prevents the seedlings on the seedling stage 80 from being excessively sent to the seedling outlet 78 side and prevents the seedlings from being crushed, so that the number of seedlings per seedling becomes excessive or the seedlings are deformed and planted. It prevents the posture from getting worse. In order to prevent the drive side arm 88 from getting over the tip side portion of the driven side arm 90, the timing at which the planting clutch 31 is disengaged per rotation of the clutch bodies 42, 43 is increased by, for example, providing many clutch claws. You may set the rotation amount of rotation small.

  Accordingly, even when the driving arm 88 rotates in the reverse direction when the machine is moving backward, the seedling feeding power is not transmitted to the seedling feeding belt 79 at all. The transmission structure to the seedling feeding belt 79 such as the member 98, the driving side arm 88, the driven side arm 90 and the link mechanism 94 is deformed or damaged, or the seedling feeding belt 79 feeds twice. It can be prevented that the amount of seedlings transferred to the seedling outlet 78 doubles and the planting accuracy such as the number of seedlings per plant and the planting posture deteriorates.

  In the lower part of the seedling planting section 4, there are a center float 100 for leveling the seedling planting positions for the central two strips, a side float 101 for leveling the seedling planting positions for the two left and right sides, and the center float 100 and the side A mid float 102 is provided to level the seedling planting position for the remaining one line with the float 101. When the aircraft is advanced with these floats 100, 101, 102 in contact with the mud surface of the field, the floats 100, 101, 102 slide while leveling the mud surface, and a seedling planting device 37 is attached to the ground level. Seedlings are planted. Each float 100, 101, 102 is rotatably attached so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float 100 is detected as a vertical movement detection mechanism during planting work. The planting depth of the seedling is always maintained constant by switching the hydraulic valve (not shown) that controls the lifting hydraulic cylinder 76 according to the detection result to raise and lower the seedling planting unit 4. To do.

  The fertilizer application device 5 feeds the fertilizer (powder granule) stored in the fertilizer storage tank (powder granule storage tank) 110 by a fertilizer feed part (powder granule feed part) 63 of each strip by a fixed amount, and the fertilizer. Is guided to the fertilizer application guide 112 attached to the floats 100, 101, 102 by a fertilizer transfer hose (powder transfer hose) 111, and is placed in the vicinity of the side portion of the seedling planting line by the groove body 113 provided on the front side of the fertilizer application guide 112 It discharges in the fertilization groove formed. The pressure air generated by the blower 115 driven by the motor 114 is blown into the fertilizer transfer hose 111 via the air chamber 116 which is long in the left-right direction, and the fertilizer in the fertilizer transfer hose 111 is discharged from the seedling planting part 4 side. It is forcibly transferred to the outlet (fertilization guide 112). The fertilizer supplied in the fertilizer groove is covered with a cover plate 117 attached to the floats 100, 101, 102 behind the fertilizer guide 112 and the groove body 113.

  Since it is desirable that the fertilization guide 112 and the grooved body 113 of each strip have the same positional relationship (distance) with the corresponding seedling planting device 37 and uniform fertilization of each strip, the same in the front-rear direction. It is arranged at the position (the same position as seen from the side of the fuselage). Similarly, it is desirable to make the distance (distance) uniform with respect to the fertilization guide 112, the groove body 113, and the seedling planting device 37 corresponding to the covering plate 117 of each strip. This is because if the cover plate is positioned too close to the fertilizer guide, mud pushed by the cover plate may be supplied into the fertilizer guide and the fertilizer guide may be clogged. If it is positioned too far from the fertilizer application guide, the fertilizer will rise slightly from the bottom of the fertilizer ditch due to water in the field before covering with the cover plate, resulting in less soil cover and appropriate fertilization effect. There is a risk of disappearing. However, if the rear ends of the center float 100 and the mid float 102 are located in front of the rear ends of the side floats 101 and the above-described problem is taken into consideration, the center float 100 and the mid float 102 are arranged at appropriate front and rear positions. The covering plate 117 of the strip that is leveled at 102 is located on the rear side of the rear ends of the floats 100 and 102. Therefore, the cover plate 117 can be attached to a position protruding rearward from the floats 100 and 102 through the bolts 119 and nuts 120 through the holes 118 at the rear ends of the floats 100 and 102. However, if the front part of the floats 100 and 102 is rotated upward as much as the cover plate 117 protrudes to the rear side from the rear ends of the floats 100 and 102, the cover plate 117 will mark the field. Therefore, the hole 118 is configured as a long hole that is long in the front-rear direction so that the front-rear position of the cover plate 117 with respect to the floats 100, 102 can be adjusted according to the field conditions such as unevenness and hardness of the field. For example, since the front portions of the floats 100 and 102 do not move up very much in a field with little unevenness and soft soil, the covering soil plate 117 is positioned rearward of the floats 100 and 102 in order to improve the accuracy of fertilization. Since the front portions of the floats 100 and 102 are likely to move upward in a field with a lot of unevenness and hard soil, the covering soil plate 117 is attached to the floats 100 and 100 in order to improve the leveling of the floats 100 and 102. The position is fixed to the front side with respect to 102.

  In addition, although embodiment of this invention described the riding type rice transplanter 1, this invention is not limited to a riding type rice transplanter.

  In addition, although embodiment of this invention described the fertilizer application apparatus 5 as a granular material discharge apparatus, you may use a sowing apparatus and a chemical spraying apparatus.

Side view of riding rice transplanter Top view of riding rice transplanter Plan view with a part of the vehicle body omitted Cross section of planted clutch case The figure which shows the relationship between a driving clutch nail and a passive clutch nail Side view showing planted clutch case Rear view showing planted clutch case Development plan view showing the structure of the seedling planting section Partial cross-sectional side view showing the transmission mechanism to the seedling feed belt Side view showing drive side arm and driven side arm The perspective view which shows the attachment structure of the covering board to a midfloat

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Riding type rice transplanter, 2 ... Traveling vehicle body, 4 ... Seedling planting part, 6 ... Front wheel (traveling propulsion body), 7 ... Rear wheel (traveling propulsion body), 8a ... Transmission branching part, 13 ... Engine (motor) ), 15... Continuously variable transmission (HST), 37. Seedling planting device, 78. Seedling outlet, 79. Seedling feeding belt, 80 ... Seedling mounting base, 88 ... Driving arm, 90. Side arm, 90a: base portion of driven arm, 90b: tip side portion of driven arm, 95: swing fulcrum shaft

Claims (1)

A seedling planting part comprising a seedling feeder for transferring seedlings on a seedling platform to a seedling outlet and a seedling planting device for taking out seedlings from the seedling outlet and planting them in a field is mounted on a traveling vehicle body, The power from the prime mover is divided into a transmission transmission path for operating the traveling propulsion body of the traveling vehicle body and a planting transmission path for operating the seedling planting section at the transmission branching section, and is transmitted. A transmission device capable of switching between forward and reverse rotation is provided on the transmission upper side from the transmission branching portion, while a rotating drive side arm contacts and rotates on the planting transmission path via a driven side arm. In a seedling transplanter equipped with a transmission path that transmits to the seedling feeding body, a swing fulcrum shaft is provided in the middle of at least one of the driving side arm and the driven side arm to transmit to the seedling feeding body The tip side portion of the arm that is in contact with the base portion KazuSatoshi seedlings feed seedling transplantation machine swingable rotate in the opposite side of the transmission.

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