JP2013048601A5 - - Google Patents

Description

Seedling transplanter

  The present invention relates to a seedling transplanter including a seedling planting device for transplanting seedlings in a paddy field and a leveling device for leveling the surface of the field in which the seedling planting device plantes seedlings.

  A conventional seedling transplanter is provided with a leveling device for leveling the farming scene on the seedling transplanting device so that it can slide up and down, and both the left and right sides of the leveling device are lifted to assist the vertical sliding of the leveling device. There is a technology to prevent the descent to the depth of entering the soil. (Patent Document 1)

JP 2009-232715 A

  However, since the seedling transplanter described in Patent Document 1 lifts the leveling device from both the left and right sides, the weight of the leveling device is concentrated at the center in the left-right direction of the leveling device, and the leveling device is accumulated due to accumulation of excessive weight over a long period of time. Will be deformed and the leveling ability will be reduced.

  Also, if the vertical slide mechanism cannot slide smoothly due to long-term use, the leveling device will not move up and down as set, the leveling device will sink into the soil and roughen the field, and seedling planting depth There is a problem that becomes unstable.

  The present invention seeks to solve this problem.

First aspect of the present invention, the rear portion of the vehicle body (2) provided with a link member (40, 41) rotatably, seedling planting unit in upper and lower link member (40, 41) (4) provided,該苗planting unit (4) soil preparation device to smooth the field surface (27) provided, provided a sliding mechanism (S1, S2) of before and after the perpendicular sliding該整place device (27), said ground leveling In the seedling transplanter provided with left and right lifting members (77, 77) for urging the left and right sides of the device (27) upward, the left and right connecting support members (84 ) projecting forward from the machine body to the leveling device (27). , 84), the left and right connecting support members (84, 84) are provided with a front sliding mechanism (S2), and the left and right rear sliding mechanisms (S1, S1) are provided on the left and right sides of the leveling device (27). the provided above the horizontal center of said ground leveling device to the fuselage forward of the front slide mechanism (S2) (27) Lifting the upper member for urging that the provided (120) as the seedling transplanter characterized.

In the invention according to claim 2, the front sliding mechanism (S2) is provided with a sliding support member (45) at a rear portion of the link member (40, 41), and a pair of the sliding support member (45). The sliding guide members (72, 72) are provided, and the sliding members (78, 78) are slid by the pair of sliding guide members (72, 72) of the left and right rear sliding mechanisms (S1, S1). The seedling transplanter according to claim 1, wherein the seedling transplanter is configured to guide in the same direction as the moving direction .

According to a third aspect of the present invention, the left and right interlocking plates (80, 80) are provided with base portions on the left and right interlocking plates (80, 80) so as to be rotatable. The vertical holes (82, 82) are respectively formed on the end portions of the left and right sides, and the support pins (83) provided on the link members (40, 41) are inserted into the left and right long holes (82, 82), The lower portions of the left and right interlocking plates (80, 80) are connected by connecting pins (121), and the upper and lower ends of the lifting member (120) are provided on the support pins (83) and the connecting pins (121), respectively. A seedling transplanter according to claim 1 or 2, wherein the seedling transplanter is provided.

According to a fourth aspect of the present invention, the leveling device (27) is composed of left and right leveling rotors (27a, 27b), and the drive shafts (70a, 70b) of the left and right leveling rotors (27a, 27b) are extended members ( 129, 129) and drive pawl (130a, 130a) fitted with a, constitute the clutch mechanism (131, 131) the drive pawl (130a, 130a) and a driven claw member (130b, 130b) by, the driven claw members (130b, 130b) and a seedling transplantation machine as set forth in any one of the slave shaft (132a, 132b) to claims 1, characterized in that the provided 3.

Invention of Claim 5 provides the fertilizer (5) in the said travel vehicle body (2 ), and among the several seedling planting apparatuses (52) provided in the said seedling planting part (4), the seedling planting of the left side of a body is carried out. Left and right partial clutch levers (138a, 138b) for switching on and off of the attaching device (52) and the seedling planting device (52) on the right side of the machine body are provided, and the left and right rear wheels (11, 11 ) of the traveling vehicle body (2) are provided. ) the provided left and right rear wheels transmission mechanism for transfer motion the (18, 18) freely vertically rotated, the rear to provide a link base frame (42) of said vehicle body (2), to the link base frame (42) Left and right motor cylinders (122, 122) are provided, left and right lids (123, 123) that move up and down by actuation of the left and right motor cylinders (122, 122) are provided, and the left and right lids (123, 122) 123) and left and right rear wheel transmission mechanisms (18, 1 8) The left and right vertical springs (124, 124) are provided so as to be stretchable between 8 and 8), and the seedling planting part (4) is configured to reduce seedlings and the amount of seedling reduction in the lateral direction of the seedling planting part (4). A seedling reduction sensor (127) for detecting the bias is provided, and a fertilizer reduction sensor (128) for detecting the fertilizer reduction and the bias of the fertilizer reduction amount in the left-right direction of the fertilizer application device (5) is provided in the fertilizer application device (5). , Decrease of seedlings detected by the seedling reduction sensor (127), or when the fertilizer reduction sensor (128) detects a decrease in fertilizer, when the decrease is biased to one of the left and right sides of the aircraft The motor cylinder (122) with the smaller amount is operated to rotate the rear wheel transmission mechanism (18) upward, and the motor cylinder (122) with the larger decrease amount is operated to operate the rear wheel transmission mechanism (18). ) Downward or forward Left and right parts row clutch lever (138a, 138b) of claim, characterized in that to the upper rotating the rear wheel transmission mechanism actuates the motor cylinder of the switching engineered side (122) (18) 1 To 4. The seedling transplanting machine according to any one of items 1 to 4.

According to a sixth aspect of the invention, provided with a left and right rear wheels transmission mechanism (18, 18) freely vertically rotated to transfer motion to the wheels (11, 11) after the left and right of the vehicle body (2), said vehicle body (2) A link base frame (42) is provided at the rear part, and left and right motor cylinders (122, 122) are provided on the link base frame (42). Left and right lids (123, 123) are provided, and left and right vertical springs (124, 124) are provided between the left and right lids (123, 123) and the left and right rear wheel transmission mechanisms (18, 18). The traveling vehicle body (2) is provided with a seat (31), the seat (31) is provided with a weight detection sensor (140) for detecting the weight of the operator, and the weight detection sensor (140) When the weight to be detected is heavy The left and right motor cylinders (122, 122) are operated to rotate the left and right rear wheel transmission mechanisms (18, 18) upward, and when the detected weight is light, the left and right motor cylinders (122, 122) are moved. The seedling transplanter according to any one of claims 1 to 5 , wherein the seedling transplanter according to any one of claims 1 to 5 , wherein the seedling transplanter is operated to rotate the left and right rear wheel transmission mechanisms (18, 18) downward .

According to the first aspect of the present invention, the left and right lifting members (77, 77) urge the left and right sides of the leveling device (27) upward, and the central lifting member (120) sets the leveling device (27 ), The load for urging the leveling device (27) upward can be dispersed, so that the leveling device (27) is prevented from being deformed by the load, and the leveling property is improved. Is maintained over a long period of time.

In addition, since the leveling device (27) can be prevented from descending too much and entering the soil, the leveling device (27) is prevented from causing irregularities in the field scene, and the seedling planting unit (4) Planting depth is stable.

Then, set the rear slide mechanism (S1, S1) on both right and left sides of the leveling device (27) only, providing the front slide mechanism (S2) to the connecting support member protruding body front side (84, 84) Thus, a front-rear distance between the front sliding mechanism (S2) and the rear sliding mechanism (S1, S1) can be provided, so that the leveling device (27) can be biased upward, and the lifting member (77 , 77) and the lifting member (120) can be reduced in size.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the pair of sliding guide members (72, 72) causes the sliding member (78) to move to the rear sliding mechanism (S1, S1). ), The sliding direction of the front sliding mechanism (S2) and the sliding direction of the rear sliding mechanism (S1, S1) can be aligned. 27) can be translated, and the attitude of touching the field scene is maintained.

According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, when the link member (40, 41) is rotated upward, the left and right interlocking formed with a long hole (82, 82). The plate (80, 80) moves upward with respect to the support pin (83) and contracts the lifting member (120), so that the link member (40, 41) rotates upward so that the leveling device (27). Is lowered with respect to the link member (40, 41), so that the leveling device (27) is prevented from coming into contact with the link member (40, 41) when the seedling planting part (4) is raised, and the leveling device (27 ) And the link members (40, 41) are prevented from being damaged.

Further, when the link members (40, 41) are rotated downward, the left and right interlocking plates (80, 80) having the long holes (82, 82) are moved upward with respect to the support pins (83). When the link member (40, 41) rotates downward by extending the member (120), the lifting member (120) biases the leveling device (27) upward, so that the leveling device (27) is in the soil. It is prevented from entering and causing unevenness in the farm scene, and the seedling planting depth by the seedling planting part (4) is stabilized.

  The effect of the invention according to claim 4 is that, in addition to the effect of the invention according to any one of claims 1 to 3, the clutches are respectively connected to the drive shafts (70a, 70b) of the left and right leveling rotors (27a, 27b). Since the mechanisms (131, 131) are provided, the clutch mechanism (131, 131) can be cut and stopped when the left and right ground leveling rotors (27a, 27b) are overloaded. Damage to (27a, 27b) is prevented.

  Further, by providing the clutch mechanisms (131, 131) on the left and right drive shafts (70a, 70b), respectively, even if one of the leveling rotors (27a, 27b) is overloaded, the other leveling rotor (27a, 27b) can be rotated, the section where the leveling work is not performed is reduced, and the planting depth of the seedling is stabilized, so that the growth of the seedling is stabilized and the quality of the crop is improved.

In addition to the effect of the invention according to any one of claims 1 to 4, the effect of the invention according to claim 5 is obtained by operating the cylinder motor (122) on the side where the amount of decrease in seedling or fertilizer is small. While rotating the wheel transmission mechanism (18) upward and operating the cylinder motor (122) with the larger reduction amount to rotate the rear wheel transmission mechanism (18) downward, the left and right rear wheel transmission mechanisms ( 18 and 18) can be appropriately rotated up and down according to the unevenness of the field, so that the planting posture of the seedling planting part (4) is stabilized and the seedling planting accuracy is improved.
Alternatively, by operating the cylinder motor (122) on the cut-off side of the left and right partial clutch levers (138a, 138b) and rotating the rear wheel transmission mechanism (18) upward, the left and right rear wheel transmission Since the mechanism (18, 18) can be appropriately rotated up and down according to the unevenness of the field, the planting posture of the seedling planting part (4) is stabilized, and the seedling planting accuracy is improved.

The effect of the invention of claim 6 is that, in addition to the effect of the invention of any one of claims 1 to 5 , when the weight detected by the weight detection sensor (140) is heavy, the left and right cylinder motors (122, 122) is operated to rotate the left and right rear wheel transmission mechanisms (18, 18) upward, so that the left and right rear wheel transmission mechanisms (18, 18) can be prevented from frequently rotating up and down. It is prevented that the vertical position of the planting part (4) changes frequently and the planting depth of the seedling is unstable, and the planting depth of the seedling is stabilized.
Further, when the weight detected by the weight detection sensor (140) is light, the left and right rear wheel transmission mechanisms (18, 18) are rotated downward by operating the left and right cylinder motors (122, 122), thereby causing unevenness in the field. Since the seedling planting part (4) can be moved up and down according to, the planting depth of the seedling is stabilized.

Side view of seedling transplanter Top view of seedling transplanter Side view of essential parts of fertilizer application equipment Plan view of main parts of leveling device Side view of main part of leveling device Side view of essential parts showing height adjustment mechanism of leveling device Main part plan view showing transmission of driving force to leveling device Main part plan view showing the seedling planting part (A) Main part side view showing vertical movement mechanism of leveling device, (b) Main part rear view showing attachment of lifting spring Side view of another example of seedling transplanter Plan view of another example of seedling transplanter (A) Main part plan view of leveling device equipped with safety clutch, (b) Enlarged view of safety clutch Side view of another example of seedling transplanter Rear view of seedling stand Partial front view of fertilizer application equipment Each block diagram of independent swing mechanism Side view of essential parts of fertilizer application of another embodiment Side view of main part of leveling device of another embodiment (A) Side view of side float, (b) Plan view of side float

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 to FIG. 9 show a riding type rice transplanter with a fertilizing device equipped with a fertilizing device which is an embodiment using the present invention.

  As shown in FIGS. 1 and 2, in this riding type rice transplanter 1 with a fertilizer application, a seedling planting device 52 is mounted on the rear side of the traveling vehicle body 2 so as to be movable up and down via a lifting link device 3. The main body portion of the fertilizer application device 5 is provided on the upper side.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13, 13 are provided on the left and right sides of the case 12, and the left and right front wheels are mounted on the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. 10 and 10 are respectively attached.

  The front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and the left and right rear wheel gears are supported by a rear wheel rolling shaft provided horizontally in the front and rear at the center of the rear end of the main frame 15. Cases 18 and 18 are supported in a freely rolling manner, and rear wheels 11 and 11 are attached to rear wheel axles 17 projecting outward from left and right rear wheel gear cases 18 and 18.

  The left and right rear wheel gear cases 18 and 18 are powered by left and right rear wheel transmission shafts 18a and 18a connected to the left and right rear wheel gear cases 18 and 18 projecting from the rear wall of the transmission case 12. It is configured to be transmitted.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via a belt transmission device 21 and an HST (hydraulic continuously variable transmission) 23. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted.

  A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the left and right rear wheel gear cases 18 and 18 to drive the left and right rear wheels 11 and 11. . In addition, the external extraction power extracted from the right side surface of the mission case 12 is transmitted to the seedling planting device 52 by the planting transmission shaft 26.

The power is taken out from the right rear wheel gear case 18 by the drive shaft and transmitted to the fertilizer feeding mechanism of the fertilizer applicator 5.
The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. A reservoir tank 16 is provided in the front cover 32 and is connected to the HST 23 by an oil feeding pipe 19 so that oil is supplied to the HST 23 from a high position. As a result, the oil easily flows down to the HST 23, so that the HST 23 is prevented from malfunctioning due to insufficient oil, and the traveling speed can be secured, the traveling direction can be switched, the start and stop can be performed as the operator has operated. Become.

  Horizontal floor steps 35 are provided on the left and right sides of the lower ends of the engine cover 30 and the front cover 32. A plurality of through holes 35a are formed in the left and right front portions of the floor step 35, and a driver who is seated in the seat 31 and controls the aircraft sees the left and right front wheels 10 and 10 and performs a traveling operation such as going straight or turning. It is easy to operate appropriately according to the situation, and mud on the shoe of the worker walking in step 35 falls to the field. The rear portion of the floor step 35 is a rear wheel fender 36 that also serves as a rear step.

Further, on both the left and right sides of the front part of the traveling vehicle body 2, the spare seedling platforms 38, 38 on which the replenishment seedlings are placed can be pivoted to a position projecting laterally from the machine body and a position housed inside. Is provided.
The lifting / lowering link device 3 has a parallel link configuration, and includes a single upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side. ing. A connecting shaft 44 that is rotatably supported by the seedling planting device 52 is inserted into and connected to the lower end portion of the vertical link 43, and the seedling planting device 52 is connected so as to be able to roll around the connecting shaft 44. A sensing member 93 that senses the raising and lowering of the center float 55 is provided at a position surrounded by the frame 94 of the seedling planting device 52.

  A lift hydraulic cylinder 46 whose base is pivotally supported on the main frame 15 is connected to a tip of a swing arm (not shown) integrally formed with the upper link 40, and the lift hydraulic cylinder 46 By expanding and contracting 46 with hydraulic pressure, the upper link 40 rotates up and down, and the seedling planting device 52 moves up and down while maintaining a substantially constant posture.

  The seedling planting device 52 has a four-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and reciprocates left and right to feed seedlings one by one to the seedling take-out outlets 51a, and for one horizontal row. When all the seedlings are supplied to the seedling outlet 51a ..., the seedling mount 51 for transferring the seedling downward by the seedling feeding belt 51b ..., the seedling planting device 52 for planting the seedling supplied to the seedling outlet 51a ... in the field. A pair of left and right drawing markers (not shown) for drawing the aircraft course in the next stroke to the topsoil surface are provided.

  In the lower part of the seedling planting device 52, a center float 55 is provided in the center, and side floats 56a and 56b are provided on the left and right sides thereof. When the aircraft is advanced with the center float 55 and the left and right side floats 56a, 56b in contact with the mud surface of the field, the center float 55 and the left and right side floats 56a, 56b slide while leveling the mud surface, A seedling is planted by the seedling planting device 52.

  The center float 55 and the left and right side floats 56a and 56b are rotatably mounted so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the front part of the center float 55 moves up and down during planting work. Is detected by an angle-of-attack control sensor (not shown) provided on the sensing member 93, and the seedling planting device 52 is moved up and down by switching a hydraulic valve that expands and contracts the lifting oil hydraulic cylinder 46 according to the detection result. The seedling planting depth is always kept constant.

  The center rotor 55 is configured in a T-shape in plan view with a wider left and right width on the front side than on the rear side, and the left and right side rotors 56a and 56b are in a plan view portal shape having a space at the center in the left and right direction on the rear side. Configure. As a result, the seedling planting device 52 is configured to plant seedlings in the space portions of the left and right side rotors 56a and 56b, and the space between the Zener rotor 55 and the left and right side rotors 56a and 56b. Therefore, since the seedlings are planted in the field which is leveled and flattened by the center float 55 and the left and right side floats 56a and 56b, the planting depth is constant, and the seedlings are prevented from being washed away and growing poorly. .

  As shown in FIG. 1 and FIG. 3, the fertilizer application device 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a predetermined amount by the feeding unit 61 of the feeding device 57, and the fertilizer is fed by the fertilizer hose 62. Guided to fertilizer guides 62a attached to the left and right sides of the center float 55 and the left and right side floats 56a, 56b, and formed in the vicinity of the side of the seedling planting strip by the grooved body 62b provided on the front side of the fertilizer guides 62a. It is configured to drop into the fertilizer groove.

  The air generated by the blower 58 driven by the electric motor is blown into the fertilizer hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forced to the fertilizer application guide 62a by wind pressure. It is designed to be transported. The air suction port of the blower 58 is opened toward the engine 20 on the inner side of the fuselage, and the exhaust gas of the engine 20 is sucked.

  The steering device 57 is the same as the conventional configuration in which a steering shaft having a recessed groove formed in the outer periphery in a horizontally long machine frame is horizontally mounted, and a rear wall plate 54 constituting the rear side of the machine frame 49 has a lower end. The upper support shaft 53 is pivoted, the upper side of the rear wall plate 54 is removed, and then it is tilted downward so that the fertilizer remaining inside is rolled out.

  On the left side of the machine frame 49, a dial gear 47 is provided in accordance with the number of operation adjusting gears for adjusting the fertilizer operation amount of the operation shaft. A piano wire 48 to be stopped is attached to the front side of the machine frame.

Since the tooth position of the dial gear 47 is made to correspond to the tooth position of the steering adjustment gear, the assembly position can be easily adjusted when the steering adjustment gear is assembled.
With the above configuration, the fertilizer can be discharged to the fertilization groove formed in the field by the grooved body 62b, and the fertilizer can be supplied near the planting position of the seedling, so that the seedling can efficiently absorb the fertilizer. And the growth of the seedling is stabilized.

  Further, the blower 58 sucks high-temperature exhaust gas generated when the engine 20 is driven, and blows off the fertilizer with the sucked exhaust gas and guides it to the fertilizer hose 62. Since the moisture in the inside can be dried, the fertilizer is prevented from adhering in the fertilization hose 62 and not being sent to the field, so that the fertilizer is not supplied and the seedling is prevented from growing badly. At the same time, it becomes unnecessary to remove the fertilizer clogged in the fertilizer hose 62.

  Further, the receiving plate 39 is projected rearward from the machine frame 49, and a residual fertilizer that rolls down when the rear wall plate 54 is turned downward is received on the receiving plate placed on the receiving plate 39. However, the receiving plate 39 is used as a stepping step when placing the seedling mat on the seedling mount 51 or supplying the fertilizer to the fertilizer hopper 60. The front side of the receiving plate 39 is formed of a flat surface to prevent the fertilizer from spilling to the lifting hydraulic cylinder 46 side, and a plurality of hole portions 29 are formed on the rear side so that the peripheral edge rises upward. The operator's feet do not slip.

  A leveling rotor mechanism 27 is provided at the front lower part of the seedling planting device 52 for leveling the uneven field surface. The leveling rotor mechanism 27 is configured by combining left and right leveling rotors 27a and 27b disposed in front of each of the left and right side floats 56a and 56b.

  In addition, the seedling mounting platform 51 slides in the left-right direction with a support roller (not shown) using a rectangular support frame body 65 whose base is fixed to a transmission case 50 that also serves as a frame of the seedling planting device 52 as a rail. It is a configuration.

  Reference numerals 28 and 28 denote left and right auxiliary steps, which are steps for placing a foot when an operator gets on and off the aircraft, and a function for reducing the labor when the operator gets on and off the aircraft and improving safety. Have.

Next, the support structure and drive configuration of the leveling rotor mechanism 27 will be described.
As shown in FIGS. 4 to 9, left and right support rods 66 a and 66 b for suspending the center float 55 and the left and right side floats 56 a and 56 b are provided at the left and right intermediate portions of the support frame body 65 of the seedling mounting platform 51. Mounting rods 67a and 67b supported by the rear slide mechanism S1 are provided at the lower front side of the rods 66a and 66b. Then, the rotor links 64a and 64b are connected to the lower ends of the mounting rods 67a and 67b, and the leveling rotor support frame 68 is provided on the rotor links 64a and 64b. The transmission case 90 is attached so as to be slightly tiltable.

  The rotor part links 64a and 64b for connecting the mounting rods 67a and 67b and the leveling rotor support frame 68 are movably connected to one of the pins 37 of the link 64 in a long hole 63a provided in the hanging metal fitting 63 of the leveling rotor support frame 68. Thus, the leveling rotor support frame 68 is configured to be slightly tiltable in the left-right direction.

  As shown in FIG. 4, left and right mounting shafts 69a and 69b are connected to drive shafts 70a and 70b protruding left and right from the transmission case 90, respectively, and the left and right outer end sides of the left and right mounting shafts 69a and 69b are supported by a leveling rotor. The side support plates 68a and 68b of the frame 68 are pivotally supported. The left and right mounting shafts 69a, 69b are mounted with a plurality of leveling blades 71, which constitute the left and right leveling rotors 27a, 27b, arranged side by side in the left-right direction.

  If the left and right mounting shafts 69a and 69b are square, hexagonal, etc., and the mounting portions (not shown) of the leveling blades 71 are matched to the shape of the mounting shafts 69a and 69b, the respective leveling blades 71. Is prevented from rotating around the mounting shafts 69a and 69b due to contact with the field, and the leveling rotors 27a and 27b on the left and right sides can perform uniform leveling and the planting depth of the seedling is stabilized. Planting accuracy is improved.

  The transmission case 90 is attached to the horizontal center of the leveling rotor support frame 68 via a bracket 92, and the front end portion of the bracket 92 is connected to the lower side of the left and right vertical links 43 constituting the lifting link device 3. It is attached to support stays 45, 45 provided at the center of the right and left of the connecting shaft 44 to be slidable up and down. Furthermore, left and right sides of the bracket 92 are provided with left and right support plates 84 and 84 that are triangular in a side view and project toward the front side of the body.

  The support stays 45, 45 are provided, and the left and right support stays 45, 45 are provided with at least four flanged rollers 72, 72... The front slide mechanism S2 is configured to be slidably mounted. The lower end portions of the left and right sliding rods 78 and 78 are connected to the left and right support plates 84 and 84.

  9, the left and right sliding rods 78 and 78 are sandwiched between the upper and lower sliding rods 78 and 78 when the seedling planting device 52 rotates upward. Is configured to restrict the left and right leveling rotors 27a and 27b from rotating in the front-rear direction using the drive shafts 70a and 70b as rotation fulcrums.

  Further, as shown in FIGS. 5, 6 and 8, triangular brackets 85 and 85 are attached to the left and right support rods 66a and 66b, respectively, as viewed from the side, and rear projecting portions are provided above the left and right brackets 85 and 85, respectively. 85a and 85b are formed, and adjusting rotation shafts 74c and 74c are respectively arranged at the rear ends of the leveling rotor vertical position adjusting levers 74a and 74b, and the leveling rotor vertical position adjusting levers 74a and 74b are configured to be movable up and down. To do.

  Further, in the vicinity of the gripping portion 86 of the left and right leveling rotor vertical position adjusting levers 74a and 74b, a plurality of recessed grooves 87 that are engaged by the bent portions 88 of the left and right leveling rotor vertical position adjusting levers 74a and 74b are provided on the left and right sides. The left and right leveling rotor vertical position adjusting levers 74a and 74b can be adjusted up and down by changing the positions of the recessed grooves 87 provided on the brackets 85 and 85 side for locking the bent portions 88.

  As shown in FIG. 5, the left and right brackets 85, 85 are provided with a pair of front and rear flanged rollers 72, 72 at upper and lower positions, and the mounting rollers 67a, 67b are moved forward and backward by the flanged rollers 72, 72. It is set as the guide form which is inserted between and slid up and down.

  The pins 73 provided at the upper ends of the left and right support members 66a and 66b are brought into contact with the bent portions 88 of the left and right leveling rotor vertical position adjusting levers 74a and 74b to restrict the raising of the leveling rotor support frame 68 relative to the seedling planting device 52. . Also, the ground leveling rotor support frame 68 is suspended by providing a tension spring 77 between the pin 75 provided near the lower ends of the left and right mounting rods 67a and 67b and the pin 76 provided on the support frame 65 side. It is said.

  Further, as shown in FIG. 9, a rotation pin 81 is provided at the front end portion of the left and right support plates 84, 84, and the lower end portions of the left and right interlocking plates 80, 80 are rotated at the left and right sides of the rotation pin 81. The long holes 82 are respectively formed from the vicinity of the upper ends of the left and right interlocking plates 80 to the center in the vertical direction. Then, connecting pins 121 for connecting the left and right interlocking plates 80 and 80 are attached below the left and right elongated holes 82 and 82.

  The connecting pin 121 is provided above the rotating pin 81 by a predetermined height. As a result, a space through which the input shaft from the rotor drive case 95 to the transmission case 90 passes is secured. The lifting spring 120 may be short as long as the tension is sufficiently secured.

  Further, a support pin 83 provided on the lower side of the upper link 40 constituting the lifting link device 3 is inserted into and connected to the long holes 82, 82, and the seedling planting device 52 extends across the support pin 83 and the connection pin 121. A lifting spring 120 that urges the central portion in the left-right direction of the leveling rotor mechanism 27 upward when the leveling rotor mechanism 27 is lowered is provided to be extendable.

  The lifting spring 120 has an upward biasing force. With this force, the left and right interlocking plates 80, 80, the support plates 84, 84 connected to the left and right interlocking plates 80, 80, and the left and right support plates, respectively. The bracket 92 to which 84 and 84 are attached, the transmission case 90 provided on the bracket 92, and the left and right leveling rotors 27a and 27b provided on the left and right sides of the transmission case 90 are biased upward.

  The lifting spring 120 hooks an upper end portion of a support pin 83 disposed in the vertical holes 82 and 82 formed in the left and right interlocking plates 80 and 80 to connect the left and right interlocking plates 80 and 80. The lower end of the connecting pin 121 is hooked, and when the upper link 40 is raised, the support pin 83 is configured to move the long hole portions 82 and 82 downward while suppressing the lifting spring 120 and contracting, and the upper When the link 40 is lowered, the support pin 83 moves the elongated holes 82 and 82 upward while opening and extending the lifting spring 120.

  The upward biasing force of the lifting spring 120 is offset by the force by which the seedling planting device 52 is lifted so that the left and right interlocking plates 80 and 80 slide upward and the support pin 83 pushes down the lifting spring 120. When raising the seedling planting device 52, the leveling rotor mechanism 27 is hardly biased upward, and the leveling rotor mechanism 27 is prevented from sliding upward until it contacts the lower link 41.

  With the above configuration, when the seedling planting device 52 is raised, when the pin 73 comes into contact with the bent portions 88 of the left and right leveling rotor vertical position adjusting levers 74a and 74b, the rise of the rotor support frame 68 is restricted, and thus the leveling rotor Since the mechanism 27 can be prevented from rising too much and coming into contact with the lower links 41 and 41, the leveling rotor mechanism 27 and the lower links 41 and 41 are prevented from being damaged, and the durability is improved.

  Further, when the seedling planting device 52 is lowered, the leveling rotor mechanism 27 is grounded by urging the leveling rotor mechanism 27 upward by the left and right tension springs 77, 77 and the center lifting spring 120. Since the leveling rotor mechanism 27 can be prevented from being lowered too much at the time, the leveling rotor mechanism 27 is prevented from disturbing and roughing the surface of the field, so that the seedling planting depth is stabilized, Growth is good.

  The leveling rotor mechanism is configured such that the left and right sides of the leveling rotor mechanism 27 and the left and right direction central portion are biased upward and supported by the left and right tension springs 77 and 77 and the center lifting spring 120. Since it is possible to prevent the weight from being concentrated and deformed at the central portion in the left-right direction, it is possible to prevent the leveling property from being lowered.

  Further, the left and right sliding rods 78, 78 are sandwiched between two upper and lower portions by a pair of front and rear flanged rollers 72, 72, so that the front slide mechanism S2 is configured. 72, and so on, and slides in the vertical direction. Therefore, both the front slide mechanism S2 and the rear slide mechanism S1 move up and down, and the leveling rotor mechanism 27 moves in parallel in the vertical direction. .

  As shown in FIGS. 10 and 11, the ground leveling rotor mechanism 27 has a support structure including left and right leveling rotors 27a and 27b, and rotor transmission cases 27d provided at inner ends of the left and right leveling rotors 27a and 27b, You may apply to the seedling transplanting machine comprised by the center leveling rotor 27c provided between the front-end part right and left of 27e.

  The above-mentioned seedling transplanter is provided with the left and right tension springs 77, 77 and the central lifting spring 120, as shown in FIG. 9, with arc-shaped left and right covering the rear upper side of the left and right leveling rotors 27a, 27b. Tensile springs 77, 77 are provided near the center of the leveling rotor cover 68a, 68b in the left-right direction, respectively, and the left and right sides of the arc-shaped center leveling rotor cover 68c covering the upper rear side of the center leveling rotor 27c are provided. It is assumed that the lower end of the lifting spring 120 is hooked and provided near the center of the direction.

At this time, the center float 55 is disposed so as to be rotatable up and down in front of the machine body by which the center leveling rotor 27c has advanced rather than the left and right side floats 56a and 56b.
With the above configuration, since the center leveling rotor 27c levels the field before the left and right leveling rotors 27a and 27b, the center float 55 can detect the depth of the field at an early stage. The planting device 52 can move to an appropriate vertical position until the seedling is planted in the field, and the planting depth of the seedling is stabilized.

  By stabilizing the planting depth of the seedling, it is possible to prevent the seedling from being lost due to wind and water flow because the planting is too shallow. However, it is not necessary to manually plant seedlings in the field, which reduces the labor of the operator.

  In addition, since the planting depth is too deep and the seedlings are buried deep in the field, excessive moisture and nutrients are prevented and the amount of sunlight is insufficient, preventing the seedlings from growing badly or growing due to pests. It is prevented from withering and the yield is prevented from decreasing.

  As shown in FIG. 7, the power transmission to the transmission case 90 that rotationally drives the left and right ground leveling rotors 27a, 27a is directed from the input shaft 95a and the left gear case 18 of the rotor drive case 95 provided at the center of the left and right sides of the machine body. The rotor-side output shaft 18b protruding in this manner is connected by a joint 96 to transmit power.

  The rotation of the input shaft 95a is transmitted to the rotor drive shaft 95d by bevel gears 95b and 95c via the rotor transmission clutch 97. Further, a boss portion 99 fixed to one end of the outer shaft 98 is fixed to the input shaft 90a of the transmission case 90, and the inner shaft 101 spline-fitted to the boss portion 100 fixed to the other end of the outer shaft 98 is a rotor drive shaft. The rotation of the rotor drive shaft 95d is transmitted to the input shaft 90a by being coupled to the joint 95d by a joint 102.

  Furthermore, the outer periphery of the inner shaft 101 is covered with a stretchable boot 103, and the stretchable boot 103 side is positioned on the front upper side of the fuselage, so that muddy water can enter the fitting portion between the boss portion 100 and the inner shaft 101. Since it does not enter, it is prevented that the inner shaft 101 does not rotate normally due to mud and rust, and the work of removing water and mud that have entered the inside becomes unnecessary.

  Since the rotor drive case 95 is provided at the center of the left and right sides of the airframe, the positional relationship with the transmission case 12 does not change even if the left and right rear wheels 11 are moved up and down, and the rotor drive shaft 95d is moved by the vertical movement of the transmission case 90. The vertical rotation is performed around the input shaft 95a, and the change in the distance between the rotor drive case 95 and the transmission case 90 is absorbed by the sliding of the outer shaft 98 and the inner shaft 101.

  In addition, the rotor drive clutch 95 may not be provided in the rotor drive case 95, and the rotor drive case 95 and the drive case 90 may have the same shape so that parts can be shared to reduce costs.

  Further, the rotor transmission clutch 97 of the rotor drive case 95 is a member for intermittently driving the transmission case 90, but one end of the operation wire W is linked to a shifter (switching tool) of the rotor transmission clutch 97, The ground leveling rotor clutch lever 106 may be operated to operate the operation wire W to switch on and off the power to the rotor drive shaft 95d so that the leveling rotor mechanism 27 is driven and stopped.

  Alternatively, the other end of the operation wire W is linked to the leveling rotor vertical position adjustment levers 74a and 74b and the lifting link device 3, and the vertical position adjustment operation when the leveling rotor mechanism 27 is used by the leveling rotor vertical position adjustment levers 74a and 74b. When the leveling rotor mechanism 27 is driven and the leveling rotor mechanism 27 is driven by the leveling rotor vertical position adjusting levers 74a and 74b, the rotor transmission clutch 97 is disengaged. Therefore, the leveling rotor mechanism 27 may be stopped.

  Further, when the seedling planting device 52 is lowered to the planting operation state by the elevating link device 3, the rotor transmission clutch 97 is turned on and the leveling rotor mechanism 27 is driven, and the seedling planting device 52 is not planted. When the lifting link device 3 is raised to the attached work state, the rotor transmission clutch 97 is turned off and the leveling rotor mechanism 27 is stopped.

  As shown in FIG. 8, the leveling rotor clutch lever 106 is provided so as to tilt the lever guide 105 provided on the right side of the connecting rod 104 that connects the left and right support members 66a, 66b to the left and right to perform the on / off operation of the clutch. . The lever guide 109 provided on the left side of the connecting rod 104 is provided with a planting depth adjustment lever 107 and a seedling amount adjustment lever 108.

Hereinafter, another configuration example of the seedling transplanter will be described. In addition, this another structural example can be added to the main invention structure of this case, and does not mutually exclude existence.
As shown in FIG. 13, the fixed sides of the motor cylinders 122, 122 are provided on the left and right sides of the link base frame 42, and the lids 123, 123 having a cross-sectional view type are fixed to the lower ends of the expansion and contraction sides of the motor cylinders 122, 122. Provide. And the upper end part of the vertical movement springs 124 and 124 is provided in the cover bodies 123 and 123 so that expansion and contraction is possible, and the lower end part of the vertical movement springs 124 and 124 is attached to the upper part of the left and right rear wheel gear cases 18 and 18.

  The left and right rear wheel gear cases 18 and 18 are provided with a rotation fulcrum (not shown) on the left and right rear wheel transmission shafts 18a and 18a side, and the rear side of the machine body is configured to be rotatable in the vertical direction. An independent swing mechanism 126 is configured by providing an operation panel 32a on the upper portion of the front cover 32 and providing independent swing switches 125 and 125 for separately extending and retracting the left and right motor cylinders 122 and 122 on the operation panel 32a. To do.

  The independent swing switches 125, 125 may be arranged in either the front-rear direction or the left-right direction as long as the left and right motor cylinders 122, 122 can be expanded and contracted separately. In addition, the independent swing switches 125 and 125 may be provided on the left side or the right side of the seat 31 or on both the left and right sides so that the operator can operate by extending his / her hand in the left / right direction of the seat 31.

  With the above configuration, when the independent swing switches 125 and 125 are operated to expand and contract the motor cylinders 122 and 122, the vertical movement springs 124 and 124 expand and contract in conjunction with the expansion and contraction of the motor cylinders 122 and 122, and the rear wheel gear case 18 is expanded. , 18 rotate up and down and the left and right rear wheels 11 and 11 are moved up and down separately to create a height difference between the left and right of the seedling transplanter in the field, and the body is biased to either the left or right. Even if this happens, the left and right rear wheels 11, 11 can be moved up and down to maintain the horizontal state in the left-right direction, so that the straight running performance is improved and the planting posture of the seedling is stabilized, so Attachment accuracy is improved.

  In the seedling transplanting machine provided with the above independent swing mechanism 126, as shown in FIGS. 14 and 16, a substantially central position in the vertical direction of the seedling placing table 51 on which a plurality of seedlings (four in this case) seedlings are placed side by side in the horizontal direction. Are provided with seedling reduction sensors 127 for notifying that the number of seedlings has decreased to less than a predetermined amount, and the left and right motor cylinders 122, 122 are controlled based on the detection state and the non-detection state of the seedling reduction sensors 127. A configuration for automatically extending and contracting to maintain the left-right balance of the aircraft will be described.

  When a seedling is placed on the seedling stage 51, the weight of the seedling is added and the weight applied to the rear part of the machine body is increased accordingly. However, if all the seedlings are evenly placed on each line, at least the left-right balance of the aircraft is stable. For this reason, in a state where the seedling reduction switch 126 for all the lines does not detect the reduction of the seedling, the left and right motor cylinders 122, 122 are in a state set by the operator by operating the independent swing switches 125, 125. maintain.

As planting of seedlings proceeds, the amount of seedling reduction gradually changes for each line, and the seedling reduction sensor 127...
Paddy rice seedlings transplanted to the field by a seedling transplanter are made by sowing seed pods on mat-like soil and growing the seedlings to a stage where they can be transplanted. Since it is very difficult, there may be a difference in the amount of seedlings consumed by the seedling removing operation of the seedling planting device 52, which causes a difference in timing when the seedling reduction sensors 127.

  If the one or more seedling reduction sensors 127... Detect the seedling reduction and the other articles do not detect the seedling reduction, the weight is biased to the side where the seedling reduction is not detected. The balance of the aircraft is biased to either side, making it difficult to run straight ahead and plant seedlings.

  In order to prevent this, the motor cylinder 122 on the side where the number of seedling reduction sensors 127 in the detected state is small, that is, on the side where the remaining amount of seedlings is large, except when the seedling reduction sensors 127 of all the lines simultaneously detect the reduction of seedlings. And the vertical movement spring 124 is contracted to reduce the expansion / contraction width, and the motor cylinder 122 on the side where the seedling reduction sensors 127... The rear wheel gear case 18 on the side with a large amount of remaining seedling can be prevented from moving up and down due to the weight of the seedling mount 51, and the rear wheel gear case on the side with a small amount of remaining seedling. 18 can move up and down in accordance with the unevenness of the field where the rear wheel 11 is in contact with the ground, so that the seedling planting device 52 can be easily aligned at an appropriate planting position with respect to the unevenness of the field scene. There is improved.

  In addition, the side where many seedlings remain in the seedling planting device 52 is lowered, the center float 55 can be accurately rotated up and down and the elevation angle cannot be detected, and the seedling planting depth does not become an appropriate depth. The planting depth of the seedling is stabilized, the seedlings that are too planted are washed away by the wind and water flow, and the yield is stabilized without the occurrence of stockouts, and the seedlings that are too planted cause poor growth It is prevented.

  As shown in FIGS. 15 and 16, the above configuration is provided with a fertilizer reduction sensor 128 in a fertilizer hopper 60 for storing fertilizer for each planting strip, and the fertilizer reduction sensor 128 is used for all fertilizers all at once. Except when detecting that the amount is less than a predetermined amount, the motor cylinder 122 on the side where the fertilizer reduction sensor 128... A configuration in which the motor cylinder 122 on the side where the seedling reduction sensors 127... In the detected state are small, that is, the side on which the remaining fertilizer is large, is extended to increase the expansion / contraction width of the vertical movement spring 124.

  With the above configuration, the amount of vertical rotation of the left and right rear wheel gear cases 18, 18 can be made substantially the same on the left and right, so that the seedling planting device 52 can be easily aligned at an appropriate planting position with respect to the unevenness of the farm scene, Improves seedling planting accuracy.

  Further, the seedling transplanting machine shown in FIGS. 2 and 13 is provided with left and right partial strip clutch levers 138a and 138b which turn off the planting operation of the operated two seedlings. In the planting work near the headland, in order to secure the number of planting strips at the headland, the left and right partial strip clutch levers 138a, 138b are operated and the planting operation for the two strips is turned off. Although the seedling planting operation may be performed, the side on which the partial clutch levers 138a and 138b are turned off does not consume the seedling placed on the seedling placing stand 51 during that time.

For this reason, when performing the planting work in the headland, the right and left balance of the seedling platform tends to be biased to the side of the partial strip clutch levers 138a and 138b that has been “turned off”.
For this reason, as shown in FIG. 16, partial strip operation sensors 139a and 139b that detect the operation of the left and right partial strip clutch levers 138a and 138b are provided, and the partial strip clutch lever 138a that the partial strip operation sensors 129a and 129b detect. The motor cylinder 122 on the side where the 138b is turned off is contracted to reduce the expansion / contraction width of the vertical movement spring 124, so that either the left or right side of the rear wheel gear case 18 is Since it can be prevented from moving up and down ignoring the unevenness of the field, it is easy to align the rear wheels 11 and 11 with the appropriate ground contact height with respect to the unevenness of the field, enabling stable running and improving workability. To do.

  When all the seedlings are placed on the seedling stage 51, the weight of the seedling stage 51 naturally increases, and the weight balance is biased toward the rear side of the machine body where the left and right rear wheel gear cases 18, 18 are provided. However, more than that, in the seedling transplanter shown in the present application, the weight of the operator (over 30 to 100 kg) on the seat 31 causes a greater bias in the weight balance. If the weight concentrates on the rear part of the seedling transplanter, the seedling planting device 52 becomes easy to access the field scene and the seedling planting depth becomes deep, so the seedling grows softly due to fertilizer, excessive water, lack of sunshine, etc. However, there is a problem that the yield is reduced due to pest and wind damage.

  In addition, when the left and right vertical springs 124 and 124 have a large expansion and contraction width in a state where the weight is concentrated on the rear part of the machine body, the left and right rear wheel gear cases 18 and 18 are left and right even though there is no unevenness in the field. The vertical movement springs 124 and 124 are rotated up and down, and the planting depth of the seedlings is disturbed, or the seedlings are not planted in the field, resulting in a shortage.

  In order to solve this problem, as shown in FIGS. 13 and 16, a weight detection sensor 140 for detecting the weight of the operator who rides is provided inside the seat 31 or between the seat 31 and the engine cover 30. As the operator's weight detected by the detection sensor 140 is heavier, the left and right motor cylinders 122 and 122 are contracted to shorten the expansion and contraction widths of the left and right vertical springs 124 and 124.

  With the above configuration, since the left and right vertical springs 124 and 124 are less likely to freely expand and contract as the operator's weight increases, the left and right rear wheel gear cases 18 and 18 are rotated up and down only when there are large irregularities on the field. Therefore, it is possible to prevent the planting depth of the seedling from being unstable due to frequent changes in the vertical position of the seedling planting device 52, and to prevent the seedling from being washed away and causing a shortage. , Planting depth is too deep to prevent poor growth.

  Further, when the worker is light, the left and right vertical springs 124 and 124 are easily expanded and contracted, so that the seedling planting device 52 can be finely moved up and down according to the fine irregularities of the field, so Since the depth is always appropriate, the growth of the seedling is stabilized and the quality of the crop is improved.

  As shown in FIG. 17, it is set as the structure which each provides the heating wire 128 ... helically along the wall surface inside the fertilizer hose 62 ... which moves the fertilizer stored in the fertilizer hopper 60 to a field. The heating wires 128 are provided inside the fertilization hoses 62 of the respective strips, and are configured to generate heat when energized when the motor that drives the blower 58 is started. The fertilizer hose 62 is made of a synthetic resin having a relatively low melting point, such as vinyl chloride, having flexibility that can be freely bent in order to prevent the seedling planting device 52 from being damaged when the seedling planting device 52 is raised or lowered. Therefore, it is desirable that the heating wires 128 ... emit heat of about 60 degrees.

  With the above configuration, the temperature inside the fertilization hose 62 is increased, the moisture in the fertilization hose 62 and moisture contained in the fertilizer are dried, and the fertilizer sticks to the inside of the fertilization hose 62 and becomes clogged. Therefore, the fertilizer is not supplied to the field and the growth of the seedling is prevented from being delayed.

  Even if a small amount of fertilizer sticks due to the high temperature in the fertilizer hose 62 ..., it becomes useless because the wind moving in the fertilizer hose 62 ... can peel off the fertilizer and move when it becomes easy to peel off. The fertilizer that will be reduced.

Further, since the fertilizer hardly remains in the fertilizer hoses 62..., Labor and time required for cleaning the fertilizer hoses 62.
The wind that conveys the fertilizer flowing in the air chamber 59 of the fertilizer application apparatus 5 is the one that sucks the exhaust gas of the engine 20 and blows it away by the blower 58, so that the upper side of the fertilization hose 62 ... tends to become hot, The lower part is close to water-filled farmland scenes and tends to be cold. For this reason, when the heating wires 128 are made of copper or zinc, and when the current flows from the high temperature side to the low temperature side, the Thomson effect is used to release the heat, and the heat is released on the lower side of the fertilization hose 62. Therefore, it is possible to prevent the fertilizer from remaining in the fertilizer hose 62 with less power consumption.

Alternatively, when a metal wire having high thermal conductivity is attached to the engine 20 and heat generated by driving the engine 20 is supplied into the fertilizer hose 62, the object can be achieved at low cost.
As shown in FIGS. 12 (a) and 12 (b), safety springs 129 and 129 are telescopically provided at the inner ends of the drive shafts 70a and 70b, and driven claws 130a and 130a that rotate together with the drive shafts 70a and 70b. And the driving claws 130a and 130a are urged outwardly by the safety springs 129 and 129, respectively. The left and right safety clutches 131 and 131 are configured by providing driven claw portions 130b and 130b that rotate when engaged with the drive claw portions 130a and 130a.

The driven claw portions 130b and 130b are mounted with driven rotary shafts 132a and 132b that pivotally mount the plurality of leveling blades 71 to constitute left and right leveling rotors 27a and 27b.
When the left and right safety clutches 131 and 131 are overloaded when the left and right ground leveling rotors 27a and 27b entrain stones falling on the field or entrap the left and right drive shafts 70a and 70b with sawdust or the like, The safety springs 129 and 129 are contracted to the inside of the machine body so that the driving claw portions 130a and 130a are separated from the driven claw portions 130b and 130b to stop the rotation of the driven rotary shafts 132a and 132b.

  With the above configuration, when one or both of the left and right leveling rotors 27a and 27b are overloaded, the safety clutches 131 and 131 can be disengaged and the rotation can be stopped. 27a, 27b and the leveling rotor mechanism 27 are not damaged, and durability is improved.

  Moreover, since the safety clutches 131 and 131 are provided at the inner end of the machine body, only the leveling rotors 27a and 27b on the overloaded side can be stopped. The leveling can be continued and the planting accuracy of the seedling is stabilized.

  As shown in FIG. 18, a rack gear 133b is provided in an arc shape along an arc surface on either one of the left and right rotor transmission cases 27d, 27d, and a forward and reverse rotation is provided with a pinion gear 133a in contact with the rack gear 133b on the output shaft. A freely rotating motor 134 is provided, and a rotor adjustment lever 135 for adjusting the vertical height of the leveling rotor mechanism 27 is provided.

  With the above configuration, the rotor adjustment lever 135 can be operated to change the vertical position at which the leveling rotor mechanism 27 comes into contact with the field scene. Therefore, when the field is hard and there are many irregularities, the leveling rotor mechanism 27 is lowered. This makes it possible to level the field scene reliably and stabilize the seedling planting depth.

  In the case of a field where the field is soft and the ground leveling rotor mechanism 27 contacts the mud on the surface layer, the leveling rotor mechanism 27 is raised to level the ground with a minimum contact opportunity, or the leveling rotor mechanism 27 If the plant is separated from the farm scene and does not perform leveling work, it is possible to prevent the generation of a muddy water stream that has a larger mass than water and tends to wash the seedlings. Is prevented and the crop yield is stabilized.

  Furthermore, since the agitated mud prevents the water from becoming turbid and the visibility is deteriorated, the operator can confirm the growth status of the seedlings and the straight signs formed on the field, and the planting accuracy of the seedlings Can be further improved.

  As described above, in a field where the soil quality is soft and the left and right leveling rotors 27a and 27b and the center leveling rotor 27c are grounded, a muddy water flow is generated or the water becomes cloudy, resulting in poor working conditions. This problem can be solved by separating the mechanism 27 upward from the farm scene.

  However, even in a soft soil field, unevenness may occur in the field, and if this unevenness is present, the center float 55 determines that the field is “shallow” at that portion, and the seedling planting device 52 There is a problem that planting depth becomes unstable.

  For this reason, by operating the rotor adjustment lever 135 to move the leveling rotor mechanism 27 upward, the rotation motor 134 is operated to rotate the pinion gear 133a counterclockwise and advance the rack gear 133b. The front end sides of the rotor transmission cases 27d and 27d rotate downward, and only the central leveling rotor 27c can ground the farm field.

  Since only the center leveling rotor 27c is in contact with the field scene, the leveling work of the field grounded by the center float 55 can be performed, so that the center float 55 is prevented from making a mistake in detecting the depth of the field, and the seedling The planting depth is stable.

  Further, since the left and right leveling rotors 27a and 27b do not level the field, the water flow generated by the rotation of the left and right leveling rotors 27a and 27b contacts the left and right side floats 56 and 56, particularly on the side of the aircraft. Since it is possible to prevent the waves on the side on which the seedlings are planted, it is possible to prevent the planted seedlings from being washed away or fall down, and the work of replanting the seedlings by the operator is omitted.

  As shown in FIG. 19, auxiliary leveling rollers 136 for grounding on the farm scene are rotatably provided below the upper bent surfaces on the front side of the left and right side floats 56, 56. The auxiliary leveling rollers 136 and 136 are rotated by contact resistance with the farm scene to level the farm field, and have a left and right length substantially the same as the left and right width of the side float 56.

  Further, a plurality of ground rollers 137 are rotatably provided behind the auxiliary leveling rollers 136 and 136 in the front-rear direction. The grounding roller 137 is configured such that the rotary shaft 137a can be moved up and down within a predetermined range on the side float 56, protrudes downward when the side float 56 is not in a grounded state, and retracts upward when the side float 56 contacts the ground. And

  With the above-described configuration, the left and right side floats 56 and 56 can be leveled by the auxiliary leveling rollers 136 and 136 immediately before the left and right side floats 56 and 56 contact the field scene. It is prevented from contacting a certain farm scene, and the left and right side floats 56 are less likely to be damaged.

  Since the center float 55 and the side float 56 are formed by integrally molding a synthetic resin, and the inside is hollow to reduce the weight, when a hole is opened in contact with a stone or the like in the field Since the weight increases due to water or mud that enters from the hole, the center float 55 has a problem that it cannot detect the depth of the field accurately.

  Therefore, the side floats 56 and 56 are prevented from being damaged by leveling the unevenness of the farm scene with the auxiliary leveling rollers 136 and 136 and pushing hard objects such as stones into the soil. In particular, if the auxiliary leveling rollers 136 and 136 are made of hard plastic or metal, the above effect is improved.

  In addition, by not providing the auxiliary leveling roller 136 in the center float 55, it is possible to prevent the auxiliary leveling roller 136 from erroneously detecting the vertical movement when leveling the field scene as a change in the depth of the field, and planting seedlings. Accuracy is improved.

  However, this does not prevent the center float 55 from being damaged by contact with stones or the like. Therefore, a metal plate (not shown) or the like is attached to the upper bent portion of the center float 55, and if there is stones or the like, it is soiled. It is good to be able to push in.

  Further, by providing a plurality of ground rollers 137... Behind the auxiliary conveying rollers 136 and 136 in the front-rear direction, when the seedling transplanter is loaded on a light truck or the like or when it is lowered on the road Since the side floats 56 and 56 can be brought into contact with the grounding roller 137... Before the side floats 56 and 56 touch the ground or the ground, the impact of the grounding can be reduced. The floats 56 and 56 are prevented from being hit against the loading platform or the ground, and the side floats 56 and 56 are prevented from being damaged.

  Further, since the ground rollers 137 are configured to retreat upward when the side floats 56 and 56 are grounded, the side floats 56 and 56 are not uneven when the field floats slide on the field scene, and the field scene is flattened. It can be leveled and seedling planting accuracy is improved.

  Although the grounding rollers 137 may be provided on the center float 55, the amount of protrusion to the field side is suppressed as compared with that provided on the side floats 56 and 56, and the erroneous detection of the depth of the field is not caused. It is desirable to do.

2 traveling vehicle body 4 seedling planting part 11 rear wheel 18 rear wheel gear case (rear wheel transmission mechanism)
27 Leveling rotor mechanism (leveling device)
27a Right leveling rotor 27b Left leveling rotor 27c Center leveling rotor 27d Left connection transmission case 27e Right connection transmission case 40 Upper link (upper link member)
41 Lower link (lower link member)
45 Support stay (sliding support member)
70a Right drive shaft 70b Left drive shaft 71 Leveling blade (leveling member)
72 Barbed roller (sliding guide member)
77 Tension spring (lifting member)
78 Sliding rod (sliding member)
90 Transmission case (rotor transmission mechanism)
120 Lifting spring (lifting member)
129 safety spring 130a drive claw part (drive claw member)
130b driven claw part (driven claw member)
131 Safety clutch (clutch mechanism)
132a Right driven rotary shaft (driven shaft)
132b Left driven shaft (driven shaft)
S1 Rear slide mechanism (rear slide mechanism)
S2 Front slide mechanism (front slide mechanism)

Claims (6)

It provided a link member (40, 41) to the rear of the vehicle body (2) rotatably, seedling planting unit (4) provided on the upper and lower link member (40, 41),該苗planting unit ( 4) soil preparation device to smooth the field surface (27) provided,該整place device (27) before and after the sliding mechanism for the vertical slide (S1, S2) is provided, the right and left sides of the leveling device (27) In the seedling transplanting machine provided with the left and right lifting members (77, 77) urging upward,
The leveling device (27) is provided with left and right connection support members (84, 84) protruding toward the front of the machine body, and the front and rear sliding mechanisms (S1, S2) are connected to the left and right connection support members (84, 84). The provided front side sliding mechanism (S2) and the left and right rear side sliding mechanisms (S1, S1) arranged behind the front side sliding mechanism (S2) are provided, and the front side sliding mechanism (S2) is provided. A seedling transplanting machine provided with a lifting member (120) for urging the central part in the left-right direction of the leveling device (27) upward from the front side of the machine. The front sliding mechanism (S2) is provided with a sliding support member (45) at the rear part of the link member (40, 41), and a pair of sliding guide members (72, 72) is provided on the sliding support member (45). ) And the pair of sliding guide members (72, 72) guide the sliding members (78, 78) in the same direction as the sliding direction of the left and right rear sliding mechanisms (S1, S1). seedling transplantation machine according to claim 1, characterized in that the configuration was. Lower portions of the left and right interlocking plates (80, 80) are respectively connected to the left and right connection support members (84, 84), and upper and lower elongated holes (82, 82) are formed above the left and right interlocking plates (80, 80). ), And supporting pins (83) provided on the link members (40, 41) are inserted into the left and right elongated holes (82, 82) and connected to the lower portions of the left and right interlocking plates (80, 80). Insert the pin (121)
The seedling transplanter according to claim 1 or 2, wherein the lifting member (120) is provided between the support pin (83) and the connecting pin (121) . The leveling device (27) is composed of left and right leveling rotors (27a, 27b), and telescopic members (129, 129) and driving pawl members are arranged on the drive shafts (70a, 70b) of the left and right leveling rotors (27a, 27b). (130a, 130a) fitted with, the drive pawl (130a, 130a) and the follower pawl member (130b, 130b) constitutes a clutch mechanism (131, 131), follow the the driven claw members (130b, 130b) The seedling transplanter according to any one of claims 1 to 3, wherein a moving shaft (132a, 132b) is provided. A fertilizer application device (5) is provided on the traveling vehicle body (2 ), and among a plurality of seedling planting devices (52) provided in the seedling planting portion (4), a seedling planting device (52) on the left side of the machine body and a right side of the machine body left and right parts row clutch lever for switching the on-off devices seedling planting (52) (138a, 138b) and provided, after a right to transfer motion to the wheels (11, 11) after the left and right of the vehicle body (2) The wheel transmission mechanism (18, 18) is provided so as to be rotatable up and down ,
A link base frame (42) is provided at the rear portion of the traveling vehicle body (2), and left and right motor cylinders (122, 122) are provided on the link base frame (42), and the left and right motor cylinders (122, 122) are operated. Left and right lids (123, 123) that move in the vertical direction are provided, and left and right vertical springs (124) are provided between the left and right lids (123, 123) and the left and right rear wheel transmission mechanisms (18, 18). , 124) are provided to be telescopic,
The seedling planting part (4) is provided with a seedling reduction sensor (127) for detecting a decrease in seedlings and a deviation in the amount of seedlings in the lateral direction of the seedling planting part (4), and fertilizer is provided in the fertilizer application device (5). And a fertilizer reduction sensor (128) for detecting the bias in the amount of fertilizer reduction in the left-right direction of the fertilizer application device (5),
Decrease amount when the seedling reduction sensor (127) detects a decrease in seedling or when the fertilizer reduction sensor (128) detects a decrease in fertilizer and is deviating toward one of the left and right sides of the aircraft. The lower wheel side motor cylinder (122) is operated to rotate the rear wheel transmission mechanism (18) upward, and the larger reduction amount side motor cylinder (122) is operated to operate the rear wheel transmission mechanism (18). Or turn it down
Alternatively, the rear wheel transmission mechanism (18) is rotated upward by operating the motor cylinder (122) of the left and right partial clutch levers (138a, 138b) that has been turned off. The seedling transplanter according to any one of claims 1 to 4. The provided left and right rear wheels transmission mechanism for transfer motion to the wheels (11, 11) after the left and right vehicle body (2) and (18, 18) freely vertically rotate,
A link base frame (42) is provided at the rear portion of the traveling vehicle body (2), and left and right motor cylinders (122, 122) are provided on the link base frame (42), and the left and right motor cylinders (122, 122) are operated. Left and right lids (123, 123) that move in the vertical direction are provided, and left and right vertical springs (124) are provided between the left and right lids (123, 123) and the left and right rear wheel transmission mechanisms (18, 18). , 124) are provided to be telescopic,
A seat (31) is provided on the traveling vehicle body (2), and a weight detection sensor (140) for detecting the weight of an operator is provided on the seat (31).
When the weight detected by the weight detection sensor (140) is heavy, the left and right motor cylinders (122, 122) are operated to rotate the left and right rear wheel transmission mechanisms (18, 18) and detect them. when the weight is light, it claims 1 5, characterized in that to the lower rotating the left and right rear wheels transmission mechanism is operated (18, 18) the left and right of the motor cylinder (122, 122) 1 The seedling transplanter according to Item.

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