JP5590017B2 - Ride type rice transplanter - Google Patents

Description

  The present invention relates to a riding rice transplanter with a leveling rotor.

In a rice transplanter equipped with a seedling planting device with a float, a configuration is known that includes a leveling rotor for leveling the field just before seedling planting by the seedling planting device.
In the present specification, the forward direction of the seedling transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.

Japanese Utility Model Publication No. 1-172311

  In the rice transplanter disclosed in Patent Document 1, the float as a leveling tool rises when the vehicle speed increases. Thus, although the structure which adjusts a leveling tool up and down according to the vehicle speed of a seedling transplanter is known, the leveling state by a leveling tool changes with not only the vehicle speed but the condition of the field.

An object of the present invention is to provide a riding type equipped with a leveling rotor capable of obtaining a stable leveling effect , appropriately leveling near a headland or near a headland, where the field is likely to be rough, and thus improving planting accuracy. It is to provide rice transplanters .

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 is provided with a seedling planting part (4) at the rear part of the traveling vehicle body (2) so as to be movable up and down, and a rotor that is arranged in the lateral width direction of the traveling vehicle body (2) and levels the ground. In the riding type rice transplanter in which (27a, 27b) is provided so as to be movable up and down with respect to the seedling planting part (4), the set height of the rotor (27a, 27b) can be adjusted, and the seedling planting part (4) The control sensitivity of the vertical position can be changed, the set height of the rotor (27a, 27b) is corrected in conjunction with the change of the control sensitivity, and the travel speed of the traveling vehicle body (2) is changed. The riding type rice transplanter is configured such that the rotor (27a, 27b) is automatically raised to the storage position when the speed is changed to the high speed running state .

According to the first aspect of the present invention, a stable leveling effect can be obtained in accordance with the hardness of the field, and the planting accuracy can be improved .

In addition , it is possible to prevent the rotor 27a, 27b from pushing the mud and water in the field during high-speed traveling, and to prevent the adjacent existing seedlings from being overturned by the muddy water flow, thereby improving the planting accuracy.

It is a side view of the riding type rice transplanter of the Example of this invention. It is a top view of the riding type rice transplanter of FIG. It is a principal part side view of the seedling planting part of the riding type rice transplanter of FIG. It is a principal part rear view of the support structure of the seedling mounting stand of the riding type rice transplanter of FIG. It is a principal part top view of the seedling planting part of the riding type rice transplanter of FIG. It is a principal part top view of the seedling planting part of the riding type rice transplanter of FIG. It is a principal part rear view which shows the arrangement | positioning relationship of the rotor and rear-wheel of the riding type rice transplanter of FIG. It is a side view of the riding type rice transplanter of the Example of this invention. It is a principal part perspective view of the seedling planting part of the riding type rice transplanter of FIG. It is sectional drawing of the chain case output-shaft part part of the seedling planting part of the riding type rice transplanter of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 are a side view and a plan view of a riding type rice transplanter equipped with a fertilizer application device as a granular material feeding device which is an embodiment using the present invention. In this riding type rice transplanter 1 with a fertilizer application, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 via an elevating link device 3 so that the seedling planting portion 4 can be moved up and down. Is provided.

  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. Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18, with a rear wheel rolling shaft provided horizontally in the front and rear sides at the rear left and right center of the main frame 15 as a fulcrum. The rear wheels 11 and 11 are attached to a rear wheel axle 11a that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 18.

  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 the belt transmission device 21 and the HST 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 rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the seedling planting unit 4 by the planting transmission shaft 26, and also the fertilizer application device 5 by the fertilization transmission mechanism 28. Is transmitted to.

  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. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

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 elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the cylinder 46 is expanded and contracted by hydraulic pressure. The upper link 40 pivots up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has a six-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlet 51a of each row one by one. When all the seedlings are supplied to the seedling outlet 51a, the seedling feed belt 51b is used to transfer the seedlings downward by a seedling feeding belt 51b, and the seedling planting is carried out in the field. Attaching device 52,..., A pair of left and right drawing markers (not shown) for drawing the aircraft path in the next stroke to the topsoil surface, and the like are provided. In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 56, 56 in contact with the mud surface of the field, the floats 55, 56, 56 slide while leveling the mud surface, and the seedling planting device 52, Seedlings are planted by ... Each of the floats 55, 56, and 56 is rotatably mounted so that the front end side moves up and down in accordance with the unevenness of the surface soil surface of the field. During planting work, the vertical movement of the front part of the center float 55 receives the angle sensor ( The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a certain amount by the feeding portions 61,... And applies the fertilizer to the left and right sides of the floats 55, 56, 56 with the fertilizer hoses 62,. Guided to a guide (not shown),... Is dropped into a fertilization structure formed in the vicinity of the side portion of the seedling planting line by a grooved body 69 provided on the front side of the fertilization guide. Air generated by the blower 58 driven by the blower electric motor 53 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 by the wind pressure. It is designed to be transported.

  A rotor 27 (27a, 27b), which is an example of a leveling device, is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame 65 having a full width in the left-right direction and the vertical direction that supports the entire seedling planting unit 4 as a rail.

The main part of the rotor support structure is shown in the side view of FIG. 3 and the rear view of FIG. 4, and FIG.
The rotor support structure includes a beam member 66 whose upper ends are rotatably supported on both side members 65b of the support frame 65 of the seedling stage 51, a support arm 67 fixed to both ends of the beam member 66, and the support. A rotor support frame 68 that is rotatably attached to the arm 67 is provided. A drive shaft 70 (70a, 70b) of the rotor 27 (27a, 27b) is attached to the lower end of the rotor support frame 68. The lower end portion of the rotor support frame 68 is connected to a connecting member 71 that is rotatably attached to the transmission case 50.

  As shown in FIG. 5, the clutch shifter 97 of the rotor drive case 87 and the clutch cable 99 for operating the shifter 97 are arranged inside the rear wheel gear case 18 and at the center of the fuselage.

A rotor raising / lowering motor 63 is provided on the axial extension line of the beam member 66.
As shown in FIG. 5, the rotor (sometimes referred to as the center rotor) 27b located in front of the center float 55 in relation to the arrangement position with the floats 55 and 56 is referred to as the rotor (referred to as side rotor) located in front of the side float 56. It is located in front of 27a. Therefore, the power to the drive shaft portion 70a of the left rotor 27a is transmitted from the gear in the gear case 18 of the rear wheel 11 to the gear in the rotor drive case 87, and from the rotor drive case 87 through the universal joint 72 and the like. The power is transmitted to the drive shaft 70b of the rotor 27b from a chain (not shown) in the chain case 73 to which power is transmitted from the end of the drive shaft 70a of the left rotor 27a inside the vehicle body. The drive shaft 70a of the right rotor 27a is transmitted with power from the drive shaft 70b of the rotor 27b via a right chain (not shown).

  Since the drive shaft portion 70b of the rotor 27b is only supported through a pair of left and right chain cases 73, 73, a reinforcing member 74 that bridges the pair of left and right chain cases 73, 73 to reinforce the chain cases 73, 73. Is provided.

The rotor 27b is suspended by a pair of link members 76 and 77 whose upper ends are supported by the beam member 66 via a spring 78.
The pair of link members 76 and 77 includes a first link member 76 whose one end is fixedly supported by the beam member 66 and a second link member 77 whose one end is rotatably connected to the other end of the first link 76. Thus, the spring 78 is connected between the other end of the second link member 77 and a mounting piece 74a rotatably supported by the reinforcing member 74.

  The beam member 66 is rotated in the direction in which the first link member 76 is rotated upward by the operation of the rotor lifting / lowering motor 63, and the first link member 76 and the second link member are rotated along with the rotation of the beam member 66. The rotor 27 b can be lifted upward via the spring 77 and the spring 78. When the rotor 27b is moved upward, the rotor 27a is also simultaneously moved upward via the drive shaft portion 70b and the drive shaft portion 70a.

  In this embodiment, the rotors 27a and 27b, which are 40 mm in height at the standard position, can be raised up to 15 mm from the standard position by the rotation of the rotor lifting / lowering motor 63, and the rotor lifting / lowering motor 63 can be rotated in the reverse direction. Is set to be 15 mm lower than the standard position.

  As shown in FIG. 4, since the rotors 27a and 27b can be moved up and down by the rotor lifting / lowering motor 63, when the seedlings are planted with the rotors 27a and 27b while leveling the edge, Switching from the working state of the rotors 27a and 27b in which the shaft of the member 66 is rotatable to the storage state of the rotors 27a and 27b is automatically performed by the rotor lifting and lowering motor 63 in conjunction with the raising of the seedling planting unit 4. It can be configured.

  Since the rotor 27b is supported by the seedling planting part 4 via a spring 78 or the like so that the rotor 27b escapes from the lower links 41, 41 when the seedling planting part 4 is raised, the rotor 27a is flexible. Is supported by the seedling planting part 4.

Further, the rotors 27a and 27b may be adjusted to a set height by a rotor height adjustment dial provided on a meter panel (not shown) provided in the vicinity of the control seat 31.
When the rotor height is set manually, the rotors 27a and 27b may not be used during the next seedling planting operation while the rotors 27a and 27b are moved to the storage position. If the configuration is adjusted to the set height, such a problem can be prevented.

  As shown in FIG. 4, a rotor raising / lowering motor 63 is attached to one end of the beam member 66. When the seedling planting portion 4 is raised, the rotors 27a and 27b are lowered, and when the seedling planting portion 4 is lowered, the rotor is moved. 27a and 27b may be configured to rise. As a result, the rotors 27a and 27b can be lowered at the time of turning, and only the turning trace can be leveled. In this case, the control device 100 controls the drive of the rotor lifting / lowering motor 63 by turning on the lifting / lowering link sensors 94 (FIG. 3) of the upper and lower links 40 and 41 of the seedling planting unit 4 and the rotor interlocking on / off switch 96 (FIG. 2). Do. In the case of such a configuration, the rotor elevating motor 63 can be automatically operated, so that the operability is improved.

As shown in FIG. 1, a rotor cover 37 is provided on the upper rear side of the rotors 27 a and 27 b so that mud is not applied to the floats 55 and 56.
As described above, the rotors 27a and 27b are usually lifted by operating the rotor lifting / lowering motor 63, but in this embodiment, a saddle clutch (see FIG. When the hook clutch lever 19 (FIG. 2) is turned off, the rotor lifting / lowering motor 63 is operated to automatically lower the rotors 27a and 27b to perform leveling work.

For this purpose, a saddle clutch lever sensor 19a (FIG. 4) for detecting whether the saddle clutch lever 19 is on or off is provided.
Therefore, when the heel clutch is disengaged by operating the heel clutch lever 19 in order to adjust the number of planting strips in the headland and the vicinity thereof, the heel clutch lever sensor 19a detects the disconnection of the heel clutch lever 19 and controls it. The apparatus 100 (FIG. 4) can automatically lower the rotors 27a and 27b to perform leveling work.

Thereby, it is possible to reliably level the headland or the vicinity of the headland which is likely to be rough in the field.
In this embodiment, the control sensitivity change dial (not shown) provided in the vicinity of the seat 31 is adjusted in accordance with the hardness of the field to adjust the control sensitivity of the vertical position of the seedling planting device 4 by expansion and contraction of the lifting hydraulic cylinder 46. It has a configuration that can be changed to multiple stages. For each set value of the control sensitivity by the control sensitivity change dial, a plurality of front and rear tilt angles (attack angles) are set to the front rising side when the field is hard, and to the front lowering side when the field is soft. Different angles are set.

  Accordingly, the control device 100 expands and contracts the lifting hydraulic cylinder 46 so that the detected value of the angle-of-attack sensor becomes the inclination angle of the center float 55 set by the control sensitivity change dial. 4 is controlled to be the set vertical position.

  At this time, if the field is hard, the control sensitivity of the elevating hydraulic cylinder 46 is made insensitive by the control sensitivity change dial. In conjunction with this, the vertical positions of the rotors 27a and 27b are corrected to the ascending side and leveling is performed. To do. On the contrary, if the field is soft, the control sensitivity change dial makes the control sensitivity of expansion / contraction of the lifting hydraulic cylinder 46 a sensitive side, and in conjunction with this, the vertical position is corrected to the downward side to level the ground. Thereby, the difference in the ground height of the rotors 27a and 27b can be suppressed by the difference in the front and rear inclination angle (attack angle) of the center float 55 due to the control sensitivity change. Further, when the rotors 27a and 27b enter deeply in a field where the soil is hard, it is possible to suppress a problem that the rotors 27a and 27b have a large driving resistance, and it is possible to prevent damage to the transmission mechanism and a decrease in traveling speed. In this way, a stable leveling effect can be achieved according to the hardness of the field.

  Further, the rotor 27a, 27b is automatically operated in conjunction with the shift lever 16 (FIG. 2) that changes the output of the HST hydraulic motor (not shown) by adjusting the inclination angle of the swash plate of the trunnion shaft of the HST 23. When the rotor lifting / lowering motor 63 is moved to the storage position (upward position), the rotors 27a and 27b do not push mud and water in the field during high-speed traveling. For this reason, it is possible to prevent the adjacent existing seedlings from being defeated by the muddy water flow.

  The rotors 27a and 27b are composed of three rotors as shown in the plan view of the main part of the planting part in FIG. 5, and are supported by the transmission case 50 by the connecting member 71. As shown in the plan view of the main part of the planting part 6, the connecting member 71 may be connected to the chain case 73 in order to support the more durable rotors 27 a and 27 b.

  Thus, since the connecting member 71 supports the leveling device at the position of the heavy chain case 73, the strength is increased by the support of the rotors 27a and 27b by the connecting member 71, and the durability is improved.

  In addition, the rear wheel 11 has a large groove in the field after the rear wheel 11 passes, and the groove shown in the plan view of the main part of the seedling planting part in FIG. 5 or FIG. In the rotors 27a, 27a immediately after the wheel 11, the large concave portion (groove) made by the rear wheel 11 could not be refilled even though the convex portion of the field could be flattened. Therefore, as shown in the rear view of the main part of the seedling planting portion showing the arrangement relationship between the rotor 27a and the rear wheel in FIG. 7, the diameter of the rotor 27a1 immediately after the rear wheel 11 is made larger than before and the rear wheel 11 is made. It may be possible to refill a large groove.

  Moreover, the modification of the principal part side view of the seedling planting part shown in FIG. 3 is shown in the principal part side view of the seedling planting part 4 of FIG. 8, and the principal part perspective view of the seedling planting part 4 of FIG. In this example, a rear wheel drive shaft 11a is protruded from the gear case 18 of the rear wheel 11, a sprocket (not shown) is provided at the end of the drive shaft 11a, and a central rotor is connected from the sprocket via a chain (not shown). Power is transmitted to a drive shaft 70b of 27b via a universal joint 70b ′ and a sprocket 64 (see FIG. 10) directly connected to the rotor shaft 70b.

  The sprocket and the chain (not shown) are accommodated in a chain case 47, and the chain case 47 is supported by a spring height adjusting member 48 supported by an upper link 40 of a lifting link mechanism of the seedling planting portion 4 by a spring 49. Yes. Further, the rotor height adjusting member 48 is provided with a long hole 48a having a locking step portion that can be locked to the upper link 40 in a plurality of steps, and a protrusion 40a provided on the upper link 40 is provided in the long hole 48a. The height position of the rotor 27b is determined by locking any of the plurality of locking steps. Further, adjustment of which of the plurality of locking step portions is to be locked can be performed by a rotor height adjusting lever 45 provided on the top of the rotor height adjusting member 48.

  Thus, since the height adjustment of the rotor 27b is directly linked to the height adjustment of the seedling planting portion 4 via the upper link 40, the rotor 27b is driven to link the rotor 27b with the inclination of the seedling planting portion 4. A joint 70b ′ is provided at the connection portion between the output shaft of the chain case 47 and the drive shaft portion 70b of the coaxial rotor 27b. Further, as shown in the cross-sectional view of the chain case output shaft portion of FIG. 10A or 10B, the output shaft 54 integrated with the sprocket 64 directly connected to the drive shaft 70b of the drive chain case 47 of the rotor 27b. Is configured to be connected to the rotor shaft portion 70b via an elastic body 57.

The rotor shaft portion 70b is provided with a planting depth rolling stay 80 for connecting the center float 55, a float adjusting pipe 81, and the like.
In this way, with the configuration shown in FIGS. 8 and 9, the rotor 27b follows the topsoil, so that the farm can be leveled.

  In the present invention, the seedling planting part of the rice transplanter can be configured simply and has a high possibility of use.

1: with fertilizing device riding rice transplanter, 2: vehicle body, 3: lifting linkage, 4: seedling planting unit, 16: shift lever 19: furrow clutch lever, 19a: ridge clutch lever sensor, 27 (27a, 27b) : rotor , 63 : rotor lifting motor , 100 : control device

Claims (1)

A seedling planting part (4) is provided at the rear part of the traveling vehicle body (2) so as to be movable up and down, and rotors (27a, 27b) arranged in the lateral width direction of the traveling vehicle body (2) and leveling the ground are seedling planting parts. In the riding type rice transplanter provided so as to be movable up and down with respect to (4), the set height of the rotor (27a, 27b) can be adjusted, and the control sensitivity of the vertical position of the seedling planting part (4) is increased. A configuration that can be changed, a configuration in which the set height of the rotor (27a, 27b) is corrected in conjunction with a change in control sensitivity, a configuration in which the traveling speed of the traveling vehicle body (2) can be changed, and a shift to a high-speed traveling state is performed. A riding type rice transplanter configured to automatically raise the rotor (27a, 27b) to the storage position when it is done .

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