JP2005312339A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly stabilize the transplanted posture of a seedling regardless of a set interval of roots by operating a seedling-transplanting device in an irregular speed at a proper irregular speed transmission ratio so as to correspond to the set interval between the transplanting roots in a seedling transplanter having a seedling-transplanting part carrying the seedling-transplanting device for transplanting the seedlings on a field and installed in a traveling car body, constituted so that the power from a motor may be transmitted through a transmission route for the transplantation to the seedling-transplanting part at a speed proportional to the traveling speed of the traveling car body, and having an irregular speed-transmission mechanism for operating the seedling-transplanting device at the irregular speed so as to match with the cycle for transplanting the seedlings, installed in the transmission route for the transplantation. <P>SOLUTION: This seedling transplanter has two or more irregular speed transmission gear pairs 33c, 33d, and a slide key 34 for switching the transmission state between the first transmission state in which the power is transmitted at the irregular speed through the two or more irregular speed transmission gear pairs 33c, 33d to the seedling-transplanting part, and the second transmission state in which the power is transmitted at the irregular speed through only the irregular speed transmission gear pair 33c as a part of the two or more irregular speed transmission gear pairs 33c, 33d to the seedling-transplanting part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  Conventionally, a seedling planting unit equipped with a seedling planting device for planting seedlings in a field is mounted on a traveling vehicle body, and the power from a prime mover is planted at a speed proportional to the traveling speed of the traveling vehicle body through a planting transmission path. In a seedling transplanting machine provided with a single inconstant speed transmission mechanism for operating the seedling planting device at an inconstant speed in accordance with the cycle of seedling planting in the seedling transmission path The inconstant speed transmission mechanism is composed of a pair of inconstant speed transmission gears, and the constant speed transmission mechanism is composed of a pair of constant speed transmission gears that are transmitted to the planting transmission path at a constant speed ratio. An inconstant speed transmission state that is transmitted to the seedling planting part through the transmission mechanism and a constant speed that is transmitted to the seedling planting part only through the constant speed transmission mechanism without using the inconstant speed transmission mechanism. Some have a switching mechanism for switching to a transmission state (see Patent Document 1).

In this seedling transplanting machine, when planting seedlings between wide stocks by lowering the operating speed of the seedling planting unit with respect to the traveling speed by the inter-strain transmission, when switching to an inconstant speed transmission state by the switching mechanism, seedling planting The seedling planting device can be operated at an unequal speed so that the device can be operated quickly at the timing of planting into the soil and planting seedlings. The planting posture of the seedling is appropriately stabilized by optimizing the planting hole so that the planting hole of the soil does not become unnecessarily large.
Japanese Patent Laid-Open No. 2004-71

  According to the above background art, when a seedling is planted between wide stocks, it can be switched to an inconstant speed transmission state by a switching mechanism, but the inconstant speed transmission ratio of the inconstant speed transmission state cannot be changed. When the setting change range between the stocks by the device becomes wide or the number of stocks that can be set increases, it is necessary to operate the seedling planting device at a non-uniform speed at an appropriate non-uniform speed transmission ratio corresponding to each set strain.

  Therefore, the present invention enables the seedling planting device to operate at a non-uniform speed with a more appropriate non-uniform transmission ratio corresponding to each set strain, and properly stabilizes the seedling planting posture regardless of the set strain. Is an issue.

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

  That is, in the invention according to claim 1, the seedling planting unit 4 including the seedling planting device 37 for planting seedlings in the field is mounted on the traveling vehicle body 2, and the power from the prime mover 13 is transmitted via the planting transmission path. The seedling planting device 37 is configured to transmit to the seedling planting unit 4 at a speed proportional to the traveling speed of the traveling vehicle body 2, and the seedling planting device 37 is operated at an unequal speed in accordance with the cycle of seedling planting in the planting transmission path. In the seedling transplanting machine provided with the inconstant speed transmission mechanisms 33c, 33d, a plurality of the inconstant speed transmission mechanisms 33c, 33d are provided, and the seedling transplanting section 4 is not connected via the plurality of inconstant speed transmission mechanisms 33c, 33d. A first transmission state in which constant speed transmission is performed, and a second transmission in which the seedling planting unit 4 is transmitted at a non-uniform speed only through a part of the plurality of non-uniform speed transmission mechanisms 33c and 33d. A seedling transplanter provided with switching mechanisms 34 and 35 for switching to a transmission state was used.

  Therefore, the seedling transplanting machine according to claim 1 is configured so that the power from the prime mover 13 is driven by the traveling vehicle body 2 while traveling the vehicle body at a speed proportional to the traveling speed of the traveling vehicle body 2 through the planting transmission path. 4 to operate the seedling planting unit 4, the seedling planting device 37 plants seedlings in the field. Then, a first transmission state in which the switching mechanisms 34 and 35 transmit the unequal speed to the seedling planting unit 4 via the plurality of unequal speed transmission mechanisms 33c and 33d, and the plurality of unequal speed transmission mechanisms 33c and 33d. Only a part of the inconstant speed transmission mechanism can be switched to the second transmission state in which the seedling planting part 4 is transmitted to the seedling planting part 4 through the 33c, and the seedling planting device 37 is changed to a different inconstant speed transmission ratio. It can be operated by transmission.

  In the invention according to claim 2, the plurality of inconstant speed transmission mechanisms 33c, 33d are each constituted by a pair of inconstant speed transmission gears, and a pair of etc. are transmitted to the planting transmission path at a constant speed ratio. The constant-speed transmission mechanisms 33a, 33b, 33e, and 33f are configured by the high-speed transmission gear, and the seedling planting is performed only by the constant-speed transmission mechanisms 33a and 33b without the non-constant-speed transmission mechanisms 33c and 33d by the switching mechanisms 34 and 35. The seedling transplanting machine according to claim 1, wherein the seedling transplanting machine is configured to be able to be switched to a constant speed transmission state in which the constant speed transmission to the attaching portion 4 is possible.

  Therefore, in addition to the operation of the seedling transplanting machine according to claim 1, the seedling transplanting machine according to claim 2 includes the same switching mechanism 34 that switches the operating speed of the seedling planting device 37 to a plurality of unequal speed transmission ratios, 35, the transmission to the seedling planting device 37 can be switched to the constant speed transmission state.

  Therefore, since the seedling transplanting machine according to claim 1 can operate the seedling planting device 37 with different unequal speed transmission ratios by the switching mechanisms 34, 35, it is large when set between relatively wide stocks. When it is set to a seedling planting device 37 with an unequal speed transmission ratio and is set between relatively narrow strains, it can be transmitted to the seedling planting device 37 with a small unequal speed transmission ratio. The seedling planting device 37 is operated at a non-uniform speed with a more appropriate unequal speed transmission ratio, and the size of the soil planting hole by the seedling planting device 37 (the amount of scratching in the soil of the seedling planting device 37) ) Can be made uniform, and the planting posture of the seedling can be properly stabilized.

  Further, in addition to the effect of the seedling transplanting machine according to claim 1, the seedling transplanting machine according to claim 2 switches the transmission to the seedling transplanting device 37 to the constant speed transmission state by the same switching mechanism 34, 35. Therefore, it is possible to easily switch between the first transmission state, the second transmission state, and the constant speed transmission state. Therefore, the seedling planting device 37 can be operated with a more appropriate transmission ratio.

  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 application device 5 is provided on the upper rear portion 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 protrudes 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 and turning on / off operation of the seedling planting unit 4. 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, there are provided spare seedling platforms 27 on which supplementary seedlings are placed.

  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-stock transmission gear portion 33 is provided which is provided in parallel with each other and includes a plurality (six) of gear pairs 33 a to 33 f between the input shaft 30 and the planting clutch shaft 32. The inter-company transmission gear 33 forms an inter-company transmission.

  Of the six gear pairs 33a to 33f, the four gear pairs 33a, 33b, 33e, and 33f in total, the two at the front and the two at the end, are composed of constant speed transmission gears, which are constant speed transmission mechanisms. Yes. The transmission ratio of each of the four constant speed transmission gear pairs 33a, 33b, 33e, 33f (value obtained by dividing the number of gear teeth on the input shaft 30 side by the number of gear teeth on the planting clutch shaft 32 side) is The gear pair disposed on the front side is larger, and the gear pair disposed on the front side is configured to rotate the gear on the planting clutch shaft 32 side at a higher speed. In each of the constant speed transmission gear pairs 33a, 33b, 33e, and 33f, the gear on the input shaft 30 side is a driving side gear, and the gear on the planting clutch shaft 32 side is a driven side gear. The third to fourth gear pairs 33c, 33d from the front sandwiched between the constant speed transmission gear pairs 33a, 33b, 33e, 33f are formed of eccentric gears, that is, inconstant speed gears. It has become. In the two inconstant speed transmission gear pairs 33c and 33d, the gears on the input shaft 30 side and the planting clutch shaft 32 side have the same shape and the same number of teeth, and the other one for one rotation of one gear. The gear rotates once. In the front non-constant speed transmission gear pair 33c, the gear on the input shaft 30 side is a drive side gear, and the gear on the planting clutch shaft 32 side is a driven side gear. On the other hand, in the rear inconstant speed transmission gear pair 33d, the gear on the planting clutch shaft 32 side is a drive side gear, and the gear on the input shaft 30 side is a driven side gear. Further, both gears on the input shaft 30 side of the front and rear inconstant speed transmission gear pairs 33c and 33d are configured to rotate integrally. Further, two cylinder shafts 41a and 41b are fitted on the front and rear sides of the planting clutch shaft 32, and the front cylinder shaft 41a has three gear pairs on the front side out of all six gear pairs 33a to 33f. 33a to 33c are provided so as to rotate integrally with a total of three gears on the planting clutch shaft 32 side, and the rear cylinder shaft 41b is a planting clutch shaft 32 of the remaining three rear gear pairs 33d to 33f. It is provided so as to rotate together with a total of three gears on the side.

  A plurality of gears on the input shaft 30 side of the inter-variety transmission gear unit 33 are provided so as to rotate freely on the input shaft 30 and a switch for selecting which of the plurality of gears is rotated together with the input shaft 30 is selected. A slide key 34 serving as a mechanism is provided on the input shaft 30. The slide key 34 is operated back and forth to change the transmission ratio (transmission path) in the inter-gear transmission gear unit 33 to change the speed. The operation speed is changed to change between planting stocks by the seedling planting unit 4. That is, when the slide key 34 is engaged with the drive side gear of the foremost constant speed transmission gear pair 33a, the power of the input shaft 30 is transmitted to the front cylinder shaft 41a via the foremost constant speed transmission gear pair 33a. The planting strain is set to 70 shares / tsubo. When the slide key 34 is engaged with the drive side gear of the second constant speed transmission gear pair 33b from the front, the power of the input shaft 30 is transmitted to the front cylindrical shaft 41a via the constant speed transmission gear pair 33b. The planting strain is set to 60 shares / tsubo. When the slide key 34 is engaged with the drive side gear of the third inconstant speed transmission gear pair 33c from the front, the power of the input shaft 30 is transferred to the front cylinder shaft 41a through the inconstant speed transmission gear pair 33c. It is transmitted at a non-uniform speed, and the planting share is set to 50 shares / tsubo. When the slide key 34 is engaged with the drive side gear of the fifth constant speed transmission gear pair 33e from the front, the power of the input shaft 30 is transmitted to the rear cylinder shaft 41a via the constant speed transmission gear pair 33e. Then, it is transmitted in series from the rear cylinder shaft 41a to the fourth non-constant speed transmission gear pair 33d from the front and the third non-constant transmission gear pair 33c from the front in order to transmit to the front cylinder shaft 41a. It is transmitted at a constant speed, and the planting share is set to 42 shares / tsubo. The fourth inconstant speed transmission gear pair 33d from the front and the third inconstant speed transmission gear pair 33c from the front exhibit the same speed ratio at the same phase, and both the inconstant speed transmission gear pairs. By transmitting through 33c and 33d, a larger inequal speed transmission ratio can be obtained. When the slide key 34 is engaged with the drive side gear of the sixth (last) constant speed transmission gear pair 33f from the front, the power of the input shaft 30 is transferred to the rear cylinder shaft via the constant speed transmission gear pair 33f. 41a is transmitted in series from the rear cylinder shaft 41a to the fourth infinite speed transmission gear pair 33d from the front and the third infinite speed transmission gear pair 33c from the front in order to transmit the cylinder shaft in the front side. 41a is transmitted at a non-uniform speed, and the planting strain is set to 37 shares / tsubo. Therefore, even if it switches between any set stock of 5 stages, it is finally transmitted to the front cylinder shaft 41a. The inconstant speed transmission gear pair 33c, 33d is a phase that operates quickly at a cycle in which the seedling planting device 37 plants seedlings one by one and when the seedling planting device 37 enters the soil and plantes seedlings. It is set to transmit at non-uniform speed. In addition, when the planting stock is 37 shares / tsubo and 42 stocks / tsubo, it is transmitted with the same unequal speed transmission ratio, and when the planting stock is relatively narrow 50 shares / tsubo, it is different from the above. When the planting strain is 70 shares / tsubo and 60 shares / tsubo, the plant is transmitted at a constant speed.

  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 the safety clutch 36 is disposed 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.

  The power changed by the inter-shaft transmission gear portion 33 is transmitted to the safety clutch 36 via the front cylinder shaft 41a fitted on the planting clutch shaft 32, and the planting clutch shaft 32 is transmitted from the safety clutch 36 to the safety clutch 36. It is configured to be transmitted to the planting clutch 31 provided on the rear side of the inter-strain transmission gear portion 33. 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. Accordingly, 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. The transmission detection switch 54, the non-transmission detection switch 55, the planting clutch motor 47, and the planting clutch shifter arm 44 can be removed. 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, 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 there is a possibility that transmission in the reverse direction is 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 in advance with respect to the clutch body, and the operation of the seedling planting device becomes inappropriate and the planting posture of the seedling 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 lifting link device 3 includes one 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. A lifting hydraulic cylinder 76 is provided between the support member fixed to the main frame 10 and the tip of the swing arm 75 formed integrally with the upper link 70.
Is hydraulically expanded and contracted, the upper link 70 is rotated up and down, and the seedling planting portion 4 is lifted and lowered in 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. 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 (state of FIG. 9B). Accordingly, the seedling feeding belt 79 is prevented from being fed twice by the driving side arm 88 being positioned below the driven side arm 90 and operating again in the forward direction. This prevents the seedlings on the seedling stage 80 from being excessively sent to the seedling outlet 78 side, thereby preventing the seedlings from being crushed. This 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 fertilizer 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, the 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 the water in the field before covering with the cover plate, resulting in a decrease in the amount of soil covering and appropriate fertilization effect. It is because there is a risk of disappearing.

The granular fertilizer stored in the fertilizer storage tank 110 may open and close the lid 110a at the top of the tank 110 when replenishing the fertilizer storage tank 110. Then, troubles such as fertilizer clogging are likely to occur in the fertilizer conveyance process such as the fertilizer feeding part 63 and the fertilizer transfer hose 111, and there is a possibility that the fertilization work cannot be performed properly. In view of this, it is preferable that the drying promoting material 120 made of highly water-absorbing and highly hygroscopic fibers forming a partition in a plan view lattice as shown in FIG. 11 is housed in the lower part of the fertilizer storage tank 110 to promote drying of the granular fertilizer. . This drying accelerator 120 contains fibers formed by directly spinning a polymer mainly composed of sodium polyacrylate and forming a fiber shape, and can be repeatedly used by drying in the sun even if it absorbs water or absorbs moisture. It has flame retardancy and deodorization performance, and can be incinerated if the water absorption and moisture absorption performance decreases due to repeated use. Thereby, drying of the fertilizer in the fertilizer storage tank 110 can be accelerated | stimulated, and the subsequent fertilizer conveyance process can be made smooth. Further, since the drying accelerator 120 is formed with a grid-like partition in plan view, it is possible to obtain a rectification action of the fertilizer flowing down in the fertilizer storage tank 110 in accordance with the operation of the fertilizer feeding unit 63, and to store the fertilizer The fertilizer can smoothly flow down to the fertilizer feeding unit 63 without causing a bridge in the tank 110. Further, instead of the drying accelerating material 120, a cylinder 121 containing a superabsorbent resin as shown in FIG. 12 may be accommodated in the fertilizer storage tank 110.

  As described above, this riding type rice transplanter 1 mounts the seedling planting unit 4 including the seedling planting device 37 for planting seedlings in the farm field to the traveling vehicle body 2, and uses the power from the engine 13 as a power transmission path for planting. The planting device 37 is transmitted at a speed proportional to the traveling speed of the traveling vehicle body 2 to the seedling planting unit 4. When two non-constant speed transmission gear pairs 33c and 33d to be operated are provided and set between 37 shares / tsubo and 42 shares / tsubo by a switching mechanism comprising a slide key 34 and an inter-stock shift shifter 35, It is switched to the first transmission state that is transmitted to the seedling planting part 4 through the constant speed transmission gear pairs 33c and 33d, and when set between 50 shares / tsubo, the two non-constant transmission gear pairs Only through one inconstant speed transmission gear pair 33c of 33c, 33d If it is switched to the second transmission state that transmits to the seedling planting part 4 at an inconstant speed and is set between 60 shares / tsubo and 70 shares / tsubo, the constant speed transmission gear pair 33c, 33d is not connected through the constant speed It is switched to the constant speed transmission state in which the constant speed transmission is performed to the seedling planting part 4 only through the transmission gear pairs 33a and 33b.

  Therefore, since the seedling planting device 37 can be operated at different inequal speed transmission ratios in conjunction with the inter-shaft shift operation by the inter-shaft shift shifter 35, it is set between 37 stocks / tsubo and 42 stocks / tsubo. When it is set, it is transmitted to the seedling planting device with a large unequal speed transmission ratio, and when it is set between 50 strains / tsubo relatively narrow strain, it is transmitted to the seedling planting device with a small unequal speed transmission ratio. Regardless of the set strain, the seedling planting device is operated at a non-uniform speed with a more appropriate nonuniform transmission ratio, and the size of the soil planting hole by the seedling planting device (see The amount of scratching in the soil) can be made uniform, and the seedling planting posture can be stabilized appropriately. Further, since the transmission to the seedling planting device 37 can be switched to the constant speed transmission state in conjunction with the same inter-shaft shifting operation by the inter-shaft shifting shifter 35, a common inter-shaft shifting operation tool (operating the inter-shaft shifting shifter 35 ( For example, the first transmission state, the second transmission state, and the constant speed transmission state can be easily switched in conjunction with the inter-company transmission operation by the inter-company transmission lever. Further, since the plurality of constant speed transmission gear pairs 33a, 33b, 33e, 33f and the plurality of inconstant speed transmission gear pairs 33c, 33d are arranged in parallel on the same transmission shaft (input shaft 30, planting clutch shaft 31). The first transmission state, the second transmission state, and the constant speed transmission state can be easily switched by the same slide key 34, and the stock transmission gear portion 33 composed of the plurality of gear pairs 33a to 33f can be made compact. The transmission structure in the planting transmission path can be simplified.

  By the way, FIG. 13 thru | or FIG. 15 shows a different stock transmission. This inter-shaft transmission is provided in place of the aforementioned planting clutch case 18, and the power from the take-out transmission shaft 17 is passed through the belt-type continuously variable transmission 122 and the inconstant speed transmission switching case 123. It is transmitted to the planting transmission shaft 19. The belt-type continuously variable transmission 122 includes a tension pulley 125 that is biased toward the transmission belt 124, and the pulley width of the driven pulley 128 is changed via the pulley operation cable 127 by operating the inter-company transmission lever 126. It can change between stocks steplessly. When the planting clutch is operated from the transmission state to the non-transmission state by the planting lifting / lowering operation lever 25, the tension pulley 125 is separated from the transmission belt 124 and the belt type continuously variable transmission 122 is switched to the non-transmission state. It has a configuration. The unequal speed transmission switching case 123 includes an input shaft 129 and an output shaft 130 connected to the planting transmission shaft 19, and a constant speed transmission gear pair 131 and an unequal speed between the input / output shafts 129 and 130. A transmission gear pair 132 is provided. When the inter-stock shift lever 126 is operated to a narrow inter-stock setting range, the constant-speed transmission gear pair 131 is in a transmission state due to the engagement of the slide key 133 and is transmitted at a constant speed. When the operation is performed, the unequal speed transmission gear pair 132 is brought into a transmission state by the engagement of the slide key 133 and is transmitted at the unequal speed transmission. Although FIG. 13 shows a configuration in which a total of two pairs of gears 131 and 132 are provided by the constant speed transmission gear pair 131 and the inconstant speed transmission gear pair 132, as described above, the inconstant speed transmission gear pair. It is good also as a structure which provides two or more and switches an inconstant speed transmission ratio in response to operation of the inter-strain shift lever 126. Further, since the inconstant speed transmission switching case 123 is provided on the lower transmission side of the belt-type continuously variable transmission 122 (seedling planting portion 4 side), regardless of the gear ratio of the belt-type continuously variable transmission 122. The inconstant speed transmission gear pair 132 is operated at a constant speed in a phase where the seedling planting device 37 is planted one plant at a time and the seedling planting device 37 enters the soil and plantes the seedling quickly. The size of the planting hole of the soil by the seedling planting device (the amount of dragging in the soil of the seedling planting device) can be made uniform, and the planting posture of the seedling can be stabilized appropriately.

  A protrusion 134a is provided at an appropriate position on the outer periphery of the output shaft of the driven pulley 128, that is, the input shaft 129 of the inconstant speed transmission switching case 123, and the rotation speed (number of rotations) of the shaft is detected by sensing the protrusion 134a. A photoelectric output shaft rotation sensor 122b is provided. The operation of the forward / reverse shift lever 24 to the forward position is detected by the forward / reverse shift lever sensor 24a, and that the planting clutch is operated in the transmission state by the planting lift lever 25. Although the lever sensor 25a detects the shaft 129, the shaft 129 is not rotated based on the detection value of the inter- stock shift lever sensor 126a that detects the set stock by the inter- stock shift lever 126 (a state in which the rotational speed is extremely reduced) ) Is detected from the output shaft rotation sensor 134, the alarm device 137 is activated by the output from the control unit 136 to notify the operator, and the planting stop solenoid 138 is operated, via the planting stop cable 139. The belt type continuously variable transmission 122 is separated from the transmission belt 124 by the tension pulley 125 of the belt type continuously variable transmission 122. And has a configuration to be linked to the transmission state. Thereby, in operation of the seedling planting device 37, it can be recognized that stones are bitten and mechanical lock is generated and it can be prevented that the seedling planting device 37 is forcibly operated and damaged in that state, The safety clutch 36 as described above is unnecessary, and the cost can be reduced. The alarm device 137 may be displayed by a monitor, a lamp or the like in addition to a sound or a buzzer.

  When the forward / reverse speed change lever 24 is operated in the reverse direction, the tension pulley 125 is separated from the transmission belt 124 via the reverse interlocking cable 140, the relay 141, and the planting stop cable 139, so that the belt type continuously variable. The transmission 122 is switched to the non-transmission state. Thereby, compared with the case where the reverse rotation prevention clutch by transmission gears, such as the above-mentioned planting clutch 31, is provided, at the time of reverse rotation, it can stop reliably, without being influenced by the transmission load change by unequal speed transmission.

  Further, in place of the hydraulic forward / reverse continuously variable transmission (HST) 15 described above, a transmission as shown in FIG. 17 may be provided. The transmission is provided with a hydraulic forward / reverse continuously variable transmission (HST) 142, a sun gear 143, a plurality of planetary gears 144 that mesh with the sun gear 143, and a ring gear 145 that meshes with the plurality of planetary gears 144. And the sun gear 143 of the planetary gear mechanism 146 is driven via the pair of output shaft side counter gears 148 and 149 from the output shaft 147 of the forward / reverse continuously variable transmission 142. A plurality of planetary gears 144 of the planetary gear mechanism 146 are revolved from the input shaft 150 of the forward / reverse continuously variable transmission 142 via the pair of input shaft side counter gears 151, 152, and the output of the forward / reverse continuously variable transmission 142 is output. The power of the shaft 147 and the input shaft 150 of the forward / reverse continuously variable transmission 142 without passing through the transmission of the forward / reverse continuously variable transmission 142 are combined to generate a ring gear. 145 rotate, and outputs it to the transmission shaft 154 to transmission into the transmission casing 8 a rotation of the ring gear 145 via the first clutch 153. In this transmission, the transmission shaft 154 can be continuously variable by operating the forward / reverse continuously variable transmission 142. As a result, the forward / reverse neutral of the transmission shaft 154 is shifted to the reverse side of the forward / reverse continuously variable transmission 142 to increase the forward rotation side of the transmission shaft 154, that is, the forward travel side of the machine body. In addition to the transmission of the hydraulic forward / reverse continuously variable transmission 142, the gear transmission is combined and output, so that the transmission efficiency is improved and a high load can be handled. And it can also be transmitted to the transmission shaft 154 from the output shaft 147 of the forward / reverse rotation continuously variable transmission through the pair of direct-coupled counter gears 155 and 156 and the second clutch 157. At this time, since all the power is transmitted through the forward / reverse continuously variable transmission 142, the transmission efficiency is reduced, but the forward / reverse switching operation which is an advantage of the forward / reverse continuously variable transmission 142 itself becomes easy. This is useful when you want to repeat forward and backward frequently. Note that only one of the first clutch 153 and the second clutch 157 can be connected, and the transmission mode can be switched depending on which of the clutches 153 and 157 is connected. In addition, since the traveling load increases when the vehicle turns at the shore, the first clutch 153 is connected due to the turning operation of the steering wheel 23 and the side brakes of the left and right rear wheels 7 or the side clutch, and the transmission efficiency is improved. The configuration is improved.

  FIG. 18 is a diagram in which a neutral holding mechanism 158 is provided in the transmission device in order to reliably obtain forward / backward neutrality. The neutral holding mechanism 158 is provided with a neutral driven gear 159 that can shift the transmission shaft 154 integrally with the driven counter gear 149 of the pair of output shaft side counter gears 148 and 149, while the forward / reverse continuously variable transmission 142. A neutral drive gear 160 transmitted from the input shaft 150 and a neutral counter gear 161 meshing with the neutral drive gear 160 are provided, and the neutral driven gear 159 and the driven counter gear 149 are interlocked with the operation of the shift lever and the like. And the neutral driven gear 159 and the neutral counter gear 161 are engaged with each other and the pair of output shaft side counter gears 148 and 149 are disengaged, so that the sun is opposite to the revolution direction of the planetary gear 144 of the planetary gear mechanism 146. The gear 143 is rotated so that the ring gear 145 does not rotate. Thereby, the forward / reverse neutral width of the shift lever can be appropriately set to a desired width, and during the forward / reverse neutral position, transmission is not performed via the hydraulic forward / reverse continuously variable transmission 142 but only gear transmission. Thus, the traveling can be surely stopped, and the forward / reverse continuously variable transmission 142 can be prevented from deteriorating because the hydraulic forward / reverse continuously variable transmission 142 is not loaded during forward / reverse neutral.

  In FIG. 19, the input shaft 150, the output shaft 147 of the hydraulic forward / reverse continuously variable transmission 142 and the central axis (transmission shaft 154) of the planetary gear mechanism 146 are arranged at the same height and sequentially in plan view. The transmission is shown in an easy-to-understand manner. With this shaft arrangement, even if the forward / reverse continuously variable transmission 142 is small, it is possible to set the desired number of teeth without reducing the diameter of the gear (gear of the planetary gear mechanism 146, etc.) of the transmission. The transmission accuracy can be improved by maintaining the strength and reducing the backlash. Further, by arranging the input shaft 150, the output shaft 147 and the central axis of the planetary gear mechanism 146 at the same height, the vertical width of the entire transmission device can be reduced, and accordingly, the floor step 26 can be lowered and the machine body can be lowered accordingly. Low center of gravity can be achieved. Conventionally, this type of transmission device is provided with a hydraulic forward / reverse continuously variable transmission and a planetary gear mechanism, so that the space of the entire device tends to be large.

  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.

  By the way, mat-like seedlings to be planted by the riding type rice transplanter 1 are sown and nurtured in the following sowing and breeding facilities.

FIG. 20 is a plan layout diagram of the sowing and raising seedling facility. The seedling raising facility has a seedling box storage area on the second floor, and the seedling boxes in the seedling box storage area are sequentially supplied one by one to the seeding equipment 202 installed on the first floor by the seedling box supply device 201. The sowing equipment 202 is placed on the floor soil supply device 204, the irrigation device 205, and the floor soil, which suppresses and levels the floor soil in the seedling box along the nursery box transport conveyor 203 that transports the seedling box in a certain direction. A seeding device 206 for sowing seed pods and a covering soil supply device 207 for covering soil are provided. The seedling boxes sowed by the sowing equipment 202 are stacked on the pallet or the emergence cart by a predetermined number of stages by the stacking equipment 208. Then, the stacked seedling boxes are carried into the germination chamber 209 and germinated. The stacked seedling boxes sprouting in the budding room 209 are stacked on the greening cart by the seedling box transfer device 210, and the greening cart is carried into the greening chamber 211 where the temperature is controlled. Raise seedlings until they grow up. The budding chamber 209 and the greening chamber 211 are each provided in three rooms.

  In accordance with a decrease in the seed soot stored in the sowing device 206 of the sowing facility 202, a seed soot supply conveyor 213 that automatically supplies seed soy from the seed soot container 212 to the sowing device 206 is provided. This sowing and breeding facility has a plurality (five) of soaking seed tanks 214. The seed sowing container 212 in a state in which the sowing seeds are contained is submerged in the soaking seed soaking tank 214 to promote seed germination. After that, the seed is supplied to the seeding device 206. A chemical solution (disinfectant) is also supplied to the soaking water tank 214, and seeds are also disinfected in this soaking process. Therefore, the immersion water tank 214 is also a seed disinfection facility. Water mixed with the chemical solution (disinfectant) is stored in a water tank 215 provided in a common greening chamber 211 to maintain a desired temperature. The sowing and seedling facility also includes a germination facility 216 that can accommodate the seed vat container 212, and seeds can be germinated in the seed vat container 212.

  The waste liquid used in the immersion water tank 214 is supplied to a relay tank 217 serving as a relay unit. The relay tank 217 has a cleaning water tank (not shown) separately provided with a supply port 218 through which drainage is supplied from the immersion water tank 214 and a supernatant liquid that is not very contaminated from the drainage stored in the relay tank 217. ) And a cleaning water discharge port 219 for discharging to the waste water, and a main discharge port 221 for discharging to the drainage water collecting tank 220 for neutralizing the drainage liquid with a flocculant or a chemical agent or the like. A drainage valve 223 that can be opened and closed is provided in the drainage discharge path 222 from the main discharge port 221 to the drainage water collecting tank 220. Therefore, the relay tank 217 branches the liquid that is not very contaminated out of the drained liquid from the immersion water tank 214 via the cleaning water discharge port 219 and supplies it to the cleaning water tank. Since there is no need to supply the drainage water collection tank 220 to the drainage liquid that does not need to be neutralized for drainage, a neutralizing agent such as an aggregating agent or a drug is unnecessarily used in the drainage water collection tank 220. And the running cost of the sowing and seedling facility can be reduced. As a specific drainage liquid sorting method in the relay tank 217, while supplying drainage from the supply port 218 to the relay tank 217, the opening degree of the drain valve 223 is appropriately adjusted to remove the contaminated drainage liquid at the bottom. At the same time as discharging to the drainage water collecting tank 220 via the main discharge port 221, it is conceivable to discharge the supernatant liquid which is not very contaminated to the cleaning water tank via the cleaning water discharge port 219. In addition, the degree of contamination of the liquid in the seeded water tank 214 before draining the liquid or the relay tank 217 that has been drained is confirmed. If the pollution is significant, the drain valve 223 is fully opened and all drained liquid is drained. If not very contaminated, the drain valve 223 may be fully closed so that all drainage is supplied to the cleaning water tank. The relay tank 217 is configured to be supplied with only the drainage from the immersion seed tank 214, but is also configured to supply the drainage from the seeding equipment 202 (drainage generated in the irrigation device 205). It is good. Further, the water stored in the cleaning water tank can be discharged from a faucet (not shown) provided in the facility so that it can be used for cleaning the facility (for example, washing the seeding equipment 41). Conventionally, there is no relay section as described above, and the drainage path from which all drainage from the soaking tank is supplied to the drainage collection tank. Mixing with contaminated drainage, there is a risk of requiring an unnecessarily large amount of a neutralizing agent such as an aggregating agent or a drug.

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 Perspective view showing drying accelerator Perspective view showing cylinder Top view showing different stock transmissions Rear view showing different stock shifts Diagram showing the tension pulley operating linkage mechanism Block Diagram Diagram showing the transmission mechanism of different transmission devices Diagram showing the transmission mechanism of different transmission devices Diagram showing the transmission mechanism of different transmission devices Plan layout of sowing planting facility Figure showing the drainage path clearly

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Riding type rice transplanter, 2 ... Running vehicle body, 4 ... Seedling planting part, 13 ... Engine (prime mover), 33 ... Inter-strain transmission gear part, 33a, 33b, 33e, 33f ... Constant speed transmission gear pair (constant speed) Transmission mechanism), 33c, 33d ... non-constant speed transmission gear pair (non-constant speed transmission mechanism), 34 ... slide key (switching mechanism), 35 ... inter-strain shift shifter (switching mechanism), 37 ... seedling planting device

Claims (2)

A seedling planting unit 4 having a seedling planting device 37 for planting seedlings in a field is attached to the traveling vehicle body 2, and the power from the prime mover 13 is proportional to the traveling speed of the traveling vehicle body 2 through the planting transmission path. The planting transmission path is provided with non-constant speed transmission mechanisms 33c and 33d for operating the seedling planting device 37 at a non-uniform speed in accordance with the cycle of seedling planting. In the seedling transplanting machine, a plurality of the inconstant speed transmission mechanisms 33c, 33d are provided, and a first transmission state is transmitted to the seedling planting unit 4 through the plurality of inconstant speed transmission mechanisms 33c, 33d. Switching mechanisms 34, 35 for switching to the second transmission state in which the seeding planting part 4 is transmitted at an inconstant speed only through some of the inconstant speed transmission mechanisms 33c, 33d. A seedling transplanting machine. The plurality of inconstant speed transmission mechanisms 33c and 33d are each constituted by a pair of inconstant speed transmission gears, and the constant speed transmission mechanisms 33a, 33a are transmitted by a pair of constant speed transmission gears that are transmitted to the planting transmission path at a constant speed ratio. 33b, 33e, 33f, and the switching mechanism 34, 35 is transmitted at a constant speed to the seedling planting part 4 at a constant speed only through the constant speed transmission mechanisms 33a, 33b without passing through the inconstant speed transmission mechanisms 33c, 33d. The seedling transplanter according to claim 1, wherein the seedling transplanter is configured to be switchable to a transmission state.

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