JP4101268B2 - Seedling planting equipment for riding rice transplanters - Google Patents

Description

  The present invention relates to a structure of a seedling planting device for a riding type rice transplanter.

In the seedling planting device of the riding type rice transplanter, as disclosed in, for example, Patent Document 1, a structure for driving a seedling platform by reciprocating lateral feed with a predetermined stroke and a structure for driving a vertical feed mechanism of a seedling platform are disclosed. The transverse feed shaft is rotatably supported, the feed member is attached to the transverse feed shaft, the feed member is connected to the seedling table, and the transverse feed shaft is driven to rotate, so that the feed member is moved at a predetermined stroke. There is a configuration in which a reciprocating lateral feed drive is performed along a lateral feed shaft so that a seedling bed is reciprocally driven by a predetermined stroke.
In the structure of Patent Document 1, one vertical feed arm is fixed to the left end portion of the horizontal feed shaft, two input parts of the vertical feed mechanism provided in the seedling stage are provided on the seedling stage, and the seedling stage is provided. When the right or left end of a predetermined stroke is reached, the right or left input unit reaches the position of the vertical feed arm and is driven by the vertical feed arm to drive the vertical feed mechanism of the seedling platform Has been.

Utility Model Registration No. 2548430 (paragraph number [0009], FIG. 3)

  In a seedling planting device for a riding type rice transplanter, a structure for driving a seedling platform in a reciprocating lateral feed with a predetermined stroke and a structure for driving a vertical feed mechanism of a seedling platform, The structure is such that the right and left input sections of the seedling platform are driven by one vertical feed arm at the left end. As a result, for example, if the right input unit has reached the vertical feed arm, then the seedling platform is laterally driven to the right by a predetermined stroke, and the left input unit reaches the vertical feed arm. .

When the seedling platform is laterally driven to the right as described above, the right input portion moves from the left end portion (vertical feed arm) of the horizontal feed shaft to the left and right center side of the horizontal feed shaft. It is necessary to sufficiently separate the left end portion (vertical feed arm) of the lateral feed shaft and the support member of the lateral feed shaft so that the right input portion does not interfere with the support member of the lateral feed shaft. However, when configured in this way, it is necessary to project the lateral feed shaft in a cantilever manner long enough from the support member of the lateral feed shaft, so when the right and left input units are driven by the vertical feed arm, A large load is applied to the transverse feed shaft.
In the seedling planting apparatus for a riding type rice transplanter, when the vertical feed arm is provided on the horizontal feed shaft, a large load is applied to the horizontal feed shaft when the right and left input units are driven by the vertical feed arm. The purpose is to prevent it from hanging.

[I]
(Constitution)
The first feature of the present invention resides in the following configuration in the seedling planting device of the riding type rice transplanter.
A seedling planting device is connected to the rear part of the traveling machine body through a link mechanism so as to be movable up and down, and a transmission case in the seedling planting device is arranged at a laterally laterally outer position than the link mechanism. And the left planting arm is rotatably supported, and the PTO shaft extending from the traveling machine body is connected to the front and rear input shaft provided in the front case portion of the transmission case. The right and left planting arms provided at the rear part of the transmission case are driven to rotate through an output shaft and a transmission mechanism so as to take out the seedlings on the seedling table and plant them on the rice field.
The right and left side parts of the rotationally driven lateral feed shaft are rotatably supported by a support member, the feed member is attached to the part of the lateral feed shaft between the right and left support members, and the feed member is used as a seedling table. Connecting. When the transverse feed shaft is rotationally driven, the feed member is reciprocally driven along the transverse feed shaft at a predetermined stroke, and the seedling table is driven back and forth at a predetermined stroke. The vertical feed arm is fixed to the part of the horizontal feed shaft that protrudes outward from the right and left from the right and left support members, and the input part of the vertical feed mechanism provided in the seedling stand is set to the right and left sides of the seedling stand. The right and left input sections are positioned on the right and left laterally outer sides of the right and left vertical feed arms that are separated by a wider distance than the distance between the right and left vertical feed arms. To configure
When the seedling table reaches the right or left end of a predetermined stroke, the right or left input unit reaches the position of the right or left vertical feed arm and is driven by the right or left vertical feed arm. The longitudinal feed mechanism is configured to be driven, and the lateral feed shaft is provided on the side of one support member that supports the lateral feed shaft from the left-right output shaft provided in the case portion of the front portion of the transmission case. A cover with an internal mechanism for transmitting power is provided.
The one support member and the cover are fixed to the lateral outer side of the front case part of the transmission case, and the total width of the cover plus the left and right width of the cover and the front case part of the transmission case is added, The width is narrower than the width between the planting claws of the right and left planting arms provided at the rear of the transmission case.

(Function)
According to the first aspect of the present invention, the right and left input sections are positioned on the right and left lateral outer sides of the right and left vertical feed arms that are separated by a wider distance than the distance between the right and left vertical feed arms. Thus , the left input unit is located on the left lateral outer side from the left vertical feed arm in a state where the right input unit reaches the right vertical feed arm. From this state, the seedling platform is driven laterally to the right by a predetermined stroke so that the left input unit reaches the left vertical feed arm, and the right input unit is moved from the right vertical feed arm to the right lateral feed arm. Leave outside.

  Therefore, according to the first feature of the present invention, as the seedling platform is reciprocally driven by reciprocating lateral feed at a predetermined stroke, the right and left input sections are moved to the right and left vertical feed arms by the right and left lateral feed arms. There is no state in which the right and left input sections move to the left and right center sides of the horizontal feed shaft beyond the right and left vertical feed arms. As a result, when the right and left side portions of the lateral feed shaft are rotatably supported by the support members, it is not necessary to project the lateral feed shafts greatly from the right and left support members, and the right and left input portions are located on the right and left sides. A state of interfering with the support member does not occur.

According to the first feature of the present invention, the right and left side portions of the transverse feed shaft are rotatably supported by the support member, and the feed member is attached to the portion of the transverse feed shaft between the right and left support members. Is connected to the seedling table.
As a result, the feed member is attached to the portion of the lateral feed shaft that is stably supported by the right and left support members, so that the reciprocating lateral feed drive of the seedling platform is performed stably. become.

(The invention's effect)
According to the first feature of the present invention, in the seedling planting device of the riding type rice transplanter, when the right and left side portions of the transverse feed shaft are rotatably supported by the support member, and the longitudinal feed arm is provided on the transverse feed shaft, It is no longer necessary to project the horizontal feed shaft from the right and left support members, and when the right and left input parts are driven by the right and left vertical feed arms, a large load is not applied to the horizontal feed shaft. It was possible to improve the durability of the transverse feed shaft.
According to the first feature of the present invention, the feed member is attached to the portion of the lateral feed shaft that is stably supported by the right and left support members, and the reciprocating lateral feed drive of the seedling platform is stably performed. As a result, the planting performance of the seedling planting device could be improved.

[II]
(Constitution)
The second feature of the present invention resides in the following configuration in the seedling planting device of the riding type rice transplanter of the first feature of the present invention.
A transverse feed shaft is rotatably supported by the right and left support members via a synthetic resin bush.

(Function)
According to the second feature of the present invention, the “action” described in the preceding item [I] is provided in the same manner as the first feature of the present invention, and in addition to this, the following “action” is provided.
According to the second feature of the present invention, the transverse feed shaft is rotatably supported by the right and left support members via the synthetic resin bush, so that the transverse feed shaft is driven smoothly. Even if mud or the like adheres to the resin bush, the transverse feed shaft can be rotatably supported regardless of this.

(The invention's effect)
According to the second feature of the present invention, the “effect of the invention” described in the preceding item [I] is provided in the same manner as the first feature of the present invention. In addition, the following “effect of the invention” is provided. ing.
According to the second feature of the present invention, the transverse feed shaft is rotatably supported by the right and left support members via the synthetic resin bush, so that the transverse feed shaft can be driven to rotate regardless of adhesion of mud or the like. It was performed smoothly, and the reciprocating lateral feed drive of the seedling platform was stably performed, so that the planting performance of the seedling planting device could be improved.

[1]
As shown in FIGS. 1 and 2, a link mechanism 3 is connected to the rear part of the machine body supported by a front wheel 1 and a rear wheel 2 that can be steered left and right, and a hydraulic cylinder 4 that drives the link mechanism 3 up and down is provided. The three-planting type seedling planting device 5 is connected to the link mechanism 3 to constitute a riding type rice transplanter.

  As shown in FIGS. 1, 2, and 3, the seedling planting device 5 is mounted on three planting arms 21 that are rotationally driven, a seedling platform 22 that is reciprocally driven by a predetermined stroke, and a seedling platform 22. A vertical feed mechanism 23 that feeds the placed seedlings downward and a leveling float 24 are provided.

[2]
Next, the support structure of the seedling planting device 5 and the rotational drive structure of the planting arm 21 will be described.
As shown in FIGS. 3, 4, and 7 (A), the link mechanism 3 includes right and left upper links 3 a, right and left lower links 3 b, and rear portions of the upper links 3 a and lower links 3 b, A support member 6 configured by bending a sheet metal material is attached. A boss member 7 is fixed to the lower part of the support member 6, and the seedling planting device 5 is supported by the boss member 7. A support frame 8 formed of a round pipe is arranged in the left-right direction, a support shaft 9 is fixed to the support frame 8 in the front-rear direction, and the support shaft 9 is rotatably supported by the boss member 7. Thereby, the seedling planting device 5 is supported around the front and rear axis P1 of the boss member 7 so as to roll freely.

  As shown in FIGS. 4 and 7 (a), on the right and left sides of the support shaft 9, the arm 10 is fixed to the support frame 8 and extends forward, and the right and left arms 10 are made of hard rubber. The regulating member 10a is provided. Accordingly, as shown in FIG. 7 (a), the right and left lower links 3b are separated from the regulating members 10a of the right and left arms 10 while the seedling planting device 5 is lowered, The planting device 5 rolls around the longitudinal axis P1 without any trouble. As shown in FIG. 7 (b), when the seedling planting device 5 is raised, the right and left lower links 3b come into contact with the regulating members 10a of the right and left arms 10, and seedling planting is performed. The device 5 is fixed so as not to roll around the longitudinal axis P1.

  As shown in FIGS. 3 and 4, a transmission case 11 made of a casting and having a left and right divided structure is connected to the left end portion of the support frame 8 and extends rearward. The transmission case 11 is provided with an input shaft 12 in the front-rear direction, and a PTO shaft 13 extending from the airframe is connected to the input shaft 12 via a universal joint 14. An output shaft 15 is provided in the left-right direction inside the transmission case 11, and the bevel gear 15 a of the output shaft 15 is engaged with the bevel gear 12 a of the input shaft 12. A drive shaft 16 is provided in the left-right direction at the rear portion of the transmission case 11, and a transmission chain 17 is wound around the sprocket 16 a of the drive shaft 16 and the sprocket 15 b of the output shaft 15.

  As shown in FIGS. 3 and 4, the drive shaft 16 protrudes right and left from the rear portion of the transmission case 11, and the drive arm 18 is fixed to the right and left ends of the drive shaft 16. The planting arm 21 is rotatably supported. A support member 45 formed by bending a plate material in a U-shape is fixed to the rear part of the transmission case 11, and the right and left arms 19 are supported on the rear part of the support member 45 so as to be swingable back and forth. The right and left arm 19 are connected to the right and left planting arms 21 so as to be rotatable.

  As shown in FIG. 4, a support frame 20 is constituted by a square pipe made of sheet metal (sheet metal material), and the support frame 20 is connected to the right end portion of the support frame 8 and extends rearward. A support frame 25 is configured by a round pipe made of sheet metal (sheet metal material), and the support frame 25 is fixed to the rear end of the support frame 20 in the left-right direction. The transmission shaft 26 is supported by the support frame 20 and extends to the right planting arm 21 of the transmission case 11. The drive arm 18 is fixed to the left end of the transmission shaft 26, and the transmission case 11 The drive arm 18 is rotatably supported by the right planting arm 21. The drive arm 18 is fixed to the right end portion of the transmission shaft 26, and the planting arm 21 is rotatably supported by the drive arm 18. A support member 27 configured by bending the plate material into an L shape is fixed to the rear portion of the support frame 25, and the arm 19 is supported on the rear portion of the support member 27 so as to be swingable back and forth. An arm 19 is rotatably connected to the planting arm 21.

  With the above structure, as shown in FIGS. 3 and 4, the power from the airframe is transmitted to the drive shaft 16 via the PTO shaft 13, the input shaft 12, the output shaft 15, and the transmission chain 17. The right and left planting arms 21 are rotationally driven, power is transmitted to the transmission shaft 26 via the right planting arm 21 of the transmission case 11, and the planting arms 21 of the support frames 20 and 25 are moved. Driven by rotation. As a result, the right and left planting arms 21 of the transmission case 11 and the planting arms 21 of the support frames 20 and 25 take out the seedlings from the lower part of the seedling base 22 (a seedling outlet 46a of a support rail 46 described later). Plant on the surface.

[3]
Next, the structure of the reciprocating lateral feed drive of the seedling raising table 22 will be described.
As shown in FIGS. 3, 4, and 5, a flat plate-like support member 28 is fixed to the left part of the front portion of the transmission case 11 and extends upward, and a round pipe-like support member 29 is a support member. It is fixed to 28 and extends upward. A round pipe-shaped support member 30 is fixed to the front portion of the support frame 20 and extends upward, and a support member 31 bent in an L shape in plan view is fixed to the support member 30. . Synthetic resin bushes 32 are attached to the support members 28 and 31, and the right and left side portions of the lateral feed shaft 33 are rotatably supported by the right and left bushes 32.

  As shown in FIGS. 3, 4, and 5, a sprocket 15 c is fixed to the end of the output shaft 15, and a sprocket 33 b is fixed to the left end of the lateral feed shaft 33, and the sprocket 15 c of the output shaft 15 A transmission chain 37 is wound around the sprocket 33 b of the lateral feed shaft 33. A cover 38 is provided to cover the sprocket 15 c of the output shaft 15, the sprocket 33 b of the lateral feed shaft 33, and the transmission chain 37, and the cover 38 is fixed to the support member 28.

  As shown in FIG. 5, a spiral groove 33 a is formed in the outer peripheral portion of the lateral feed shaft 33, and a cylindrical first feed member 34 is rotatably fitted on the lateral feed shaft 33, and is attached to the first feed member 34. The tip of the supported second feed member 35 is inserted into the spiral groove 33 a of the lateral feed shaft 33. The seedling table 22 and the first feed member 34 are connected by a connecting member 36, and an elastic rubber cover 39 is connected across the first feed member 34 and the right and left bushes 32. The lateral feed shaft 33 is covered by 39.

As shown in FIGS. 4, 8, and 9, the support rail 46 is supported by the transmission case 11 and the support frame 20, and the lower portion of the seedling support 22 is supported by the support rail 46 so as to be movable laterally. As shown in FIGS. 3 and 4, the upper portion of the seedling base 22 is supported on the upper portions of the support members 29 and 30 so as to be movable laterally and to be vertically movable.
With the above structure, as shown in FIG. 5, when the lateral feed shaft 33 is rotationally driven, the first and second feed members 34, 35 are moved along the spiral groove 33 a of the lateral feed shaft 33 at a predetermined stroke. Reciprocating lateral feed driving is performed, and the seedling setting table 22 is reciprocated laterally driven with a predetermined stroke.

  As shown in FIGS. 4, 8, and 9, the support rod 41 is fixed to the support rail 46, the U-shaped bracket 42 is fixed to the transmission case 11 and the support frame 20, and the support rod 41 is attached to the bracket 42. Has been inserted. A boss member 43 is rotatably supported at a lower portion of the bracket 42, a rod 43 b is fixed to an end portion of the boss member 43, and a spring 44 that biases the boss member 43 downward is provided. The male screw portion 41a of the support rod 41 is inserted into the through hole 43a (in which a female screw is formed).

  With the above structure, as shown in FIGS. 8 and 9, when the boss member 43 is rotated by holding the rod 43b of the boss member 43 in the transmission case 11 and the support frame 20, the position of the support rod 41 is changed up and down. Is done. As a result, as described in [2] above, the position of the lower portion of the seedling support 22 (the seedling extraction port 46a of the support rail 46) is changed up and down with respect to the planting arm 21 that is rotationally driven with a constant trajectory. Thus, the amount of seedling taken out by the planting arm 21 from the lower part of the seedling raising table 22 can be changed.

  In this case, as shown in FIG. 8 and FIG. 9, the amount of seedlings taken out by the planting arm 21 from the lower part of the seedling base 22 is grasped by the positions of the groove-shaped marks 41 b provided on the support rod 41 and the brackets 42. can do. A state in which the boss member 43 is rotated by vibration or the like due to friction caused by the boss member 43 being biased downward by the spring 44 is prevented.

[4]
Next, the structure of the vertical feed mechanism 23 provided in the seedling raising table 22 will be described.
As shown in FIGS. 1 and 2, the seedling setting table 22 includes three seedling setting surfaces 22a, and a vertical feed mechanism 23 is provided on each of the three seedling setting surfaces 22a. As shown in FIG. 6, a support shaft 47 covering substantially the entire width of the seedling platform 22 is supported by an intermediate portion of the seedling platform 22 and a driven roller 53 rotatably supported by the support shaft 47 includes a seedling surface 22a. It faces the opening 22b formed in the.

  As shown in FIG. 3 and FIG. 6, right and left driving shafts 48 having a hexagonal cross section over substantially the entire width of the seedling platform 22 are arranged at the lower part of the seedling platform 22 and fixed to the back surface of the seedling platform 22. The drive shaft 48 is rotatably supported by the bracket 50. A driving roller 51 is fixed to the driving shaft 48, the driving roller 51 faces an opening 22c formed on the seedling surface 22a, and a longitudinal feeding belt 52 having a large number of projections on the surface is driven and driven rollers 51, 53. It is wound over. A one-way clutch 54 is fitted on the right and left ends of the drive shaft 48, an input arm 54a is provided on the one-way clutch 54, and a spring 55 that biases the input arm 54a back to a predetermined position is provided. ing. As shown in FIGS. 3 and 5, the longitudinal feed arm 56 is fixed to the right and left ends of the lateral feed shaft 33.

  3, 5, and 6, the right and left input arms 54 a are positioned on the right and left lateral outer sides of the right and left vertical feeding arms 56, and the right and left vertical feedings are performed. The arm 56 is rotationally driven together with the lateral feed shaft 33. As a result, as described in [3] above, when the seedling stage 22 is laterally driven to the right, the right input arm 54a moves away from the right vertical feed arm 56 to the right laterally outer side. The left input arm 54 a approaches the left vertical feed arm 56 from the left lateral outer side of the left vertical feed arm 56. Accordingly, when the seedling stage 22 reaches the right stroke end, the left input arm 54a reaches the position of the left vertical feed arm 56, and the left vertical feed arm 56 causes the left input arm 54a to move upward from a predetermined position. And the drive shaft 48 and the longitudinal feed belt 52 are rotationally driven by the left one-way clutch 54 (each longitudinal feed mechanism 23 of the seedling raising surface 22a is driven), and the seedlings placed on the seedling raising table 22 are driven. Is sent downward (support rail 46).

  When the seedling table 22 is laterally driven to the left, the left input arm 54a moves away from the left vertical feed arm 56 to the left laterally outer side, and the right input arm 54a is moved to the right vertical feed arm 56. The right vertical feeding arm 56 is approached from the right lateral outer side. As a result, when the seedling stage 22 reaches the left stroke end, the right input arm 54a reaches the position of the right vertical feed arm 56, and the right vertical feed arm 56 moves the right input arm 54a from the predetermined position. Driven upward, the drive shaft 48 and the vertical feed belt 52 are rotationally driven by the right one-way clutch 54 (the respective vertical feed mechanisms 23 of the seedling raising surface 22a are driven) and placed on the seedling raising table 22. The seedling is sent downward (support rail 46).

[5]
Next, the structure of the right and left markers 57 will be described.
As shown in FIGS. 2 and 4, a support frame 58 extends from the support members 28 and 30 to the right and left lateral outer sides, and as shown in FIGS. 12 and 13, at the end of the support frame 58. A bracket 59 is swingably supported around the longitudinal axis P2, and a marker 57 is fixed to the bracket 59 via a support pin 60.

  As shown in FIGS. 7A and 12, one end of the outer 61 a of the right and left wires 61 is fixed to the bracket 6 a of the support member 6, and the inner 61 b of the right and left wires 61 is fixed. One end is connected to the right and left lower links 3b. As shown in FIGS. 12 and 14, the other ends of the outer 61a of the right and left wires 61 are fixed to brackets 58a fixed to the right and left support frames 58, and the right and left wires 61 are fixed. The other end of the inner 61 b is connected to the support pins 60 of the right and left markers 57.

  Thus, when the seedling planting device 5 is driven up, the positional relationship between the support member 6 and the right and left lower links 3b as shown in FIGS. 7 (a) and 12 to 7 (b) and FIG. Due to the change, the inner 61b of the right and left wires 61 is pulled by the right and left lower links 3b, and the right and left markers 57 are moved from the working posture (the state shown in FIG. 12) to the retracted posture (shown in FIG. 13). State). When the seedling planting device 5 is driven downward, the inner 61b of the right and left wires 61 is returned to the right and left markers 57 due to a change in the positional relationship between the support member 6 and the right and left lower links 3b. .

  As shown in FIGS. 12 and 14, an L-shaped holding member 62 is supported in a swingable manner around the longitudinal axis P <b> 3 at the end of the support frame 58, and the bracket of the holding member 62 and the support frame 58 is supported. 58a is connected to the spring 63, and the holding member 62 is urged downward (on the side of engagement with the marker 57 in the retracted position). A release operation rod 64 is connected to the holding member 62, and the release operation rod 64 extends upward as shown in FIGS. 1 and 2.

  The state shown in FIG. 13 is a state in which the seedling planting device 5 is driven up and the marker 57 is operated to the retracted position, and the recess 62a of the holding member 62 is engaged with the support pin 60 of the marker 57, Reference numeral 57 denotes a state held in the retracted posture. When the seedling planting device 5 is driven downward in this state, the inner 61b of the right and left wires 61 is returned to the right and left markers 57 as described above, but the holding member 62 causes the markers 57 to be in the retracted position. Is retained.

  When the seedling planting device 5 is driven downward and holds the upper part of the release operation rod 64 and pulls it upward, the holding member 62 is operated to be removed from the support pin 60 of the marker 57 and the marker 57 swings downward by its own weight. Then, the support pin 60 of the marker 57 rides on the support frame 58, and as shown in FIG. 12, the working posture is such that the tip of the marker 57 enters the rice field. Next, when the release operation rod 64 is released, the holding member 62 swings downward by the urging force of the spring 63, and the end of the holding member 62 comes into contact with the support pin 60 of the marker 57 from above. The end of the holding member 62 presses the support pin 60 of the marker 57 from above by the urging force of 63. Thereby, the lift of the marker 57 from the working posture is suppressed.

  As shown in FIG. 12, when the seedling planting device 5 is driven up in a state where the marker 57 is in the working posture, the inner 61b of the right and left wires 61 is pulled to the right and left lower links 3b. Therefore, the marker 57 is operated to the retracted posture together with the holding member 62 against the biasing force of the spring 63, and when the marker 57 reaches the retracted posture, the spring 63 is attached. The recess 62a of the holding member 62 is engaged with the support pin 60 of the marker 57 by the force, and the marker 57 is held in the retracted position.

[6]
Next, the structure of the leveling float 24 will be described.
As shown in FIGS. 1 and 3, the leveling float 24 is configured with a width that is slightly wider than the distance between the right and left rear wheels 2. As shown in FIGS. 10A and 11, the support bracket 65 is fixed at two positions on the left and right of the rear portion of the leveling float 24, and the support bracket 66 is fixed at one position on the front left and right of the leveling float 24. The support bracket 65 has three connection holes 65a (round holes).

  As shown in FIGS. 10 (a) and 11, a support bracket (not shown) is provided at the lower rear portion of the transmission case 11, and a support bracket 20 a is fixed to the lower rear portion of the support frame 20. The support bracket 65 (desired connection hole 65a) is attached to the support bracket 20a by the connection pin 67. As a result, the front portion of the leveling float 24 is supported around the connecting pin 67 so as to be swingable up and down.

  As shown in FIGS. 10 (a), 10 (b), and 11, a guide member 68 formed by bending an elongated plate material into an inverted L shape is swingable back and forth via a connecting pin 71 to a support bracket 66. It is supported. One end portion of the outer 69 a of the wire 69 is fixed to the upper portion of the guide member 68, and a coiled spring 70 is attached to one end portion of the inner 69 b of the wire 69. A ring-shaped attachment portion 70 a is provided at the lower end of the spring 70, a long hole 68 a is formed in the guide member 68, and an upper end portion 70 b of the spring 70 is inserted into the long hole 68 a of the guide member 68. A pin 10 b fixed to the right arm 10 is inserted into the elongated hole 68 a of the guide member 68, and an attachment portion 70 a of the spring 70 is attached to the pin 10 b of the right arm 10.

[7]
Next, the raising / lowering control of the seedling planting apparatus 5 will be described.
As shown in FIGS. 1, 3, and 15, a control valve 73 is provided in the front portion of the transmission case 72 that supports the right and left rear wheels 2, and the other end of the inner 69 b of the wire 69 is connected to the control valve 73. The other end of the outer 69a of the wire 69 is fixed to a sensitivity adjusting lever 74 which is connected and can be held and changed. The raising / lowering lever 75 is provided, and the raising / lowering lever 75 operates the planting clutch (not shown) and the control valve 73 which can transmit and interrupt motive power to the seedling planting apparatus 5.

  When the elevating lever 75 is operated to the raised position by the above structure, hydraulic oil is supplied from the control valve 73 to the hydraulic cylinder 4 in a state where the planting clutch is operated to the shut-off side, and the hydraulic cylinder 4 contracts, so that the seedling The planting device 5 is driven up. When the elevating lever 75 is operated to the neutral position, the control valve 73 is operated to the neutral position with the planting clutch operated to the shut-off side, the hydraulic cylinder 4 is stopped, and the seedling planting device 5 is stopped at that position. To do. When the elevating lever 75 is operated to the lowered position, the hydraulic oil is discharged from the hydraulic cylinder 4 with the planting clutch operated to the disengagement side, the hydraulic cylinder 4 is extended, and the seedling planting device 5 is driven downward. The

  When the lifting lever 75 is operated to the planting position with the leveling float 24 in contact with the rice field, the planting clutch is operated to the transmission side, and the seedling is placed as described in [2] [3] [4] above. The planting arm 21 is rotationally driven while the table 22 is driven to reciprocate laterally with a predetermined stroke, and the seedling is planted on the rice field. At the same time, the raising / lowering control of the seedling planting device 5 is performed as follows so that the planting depth of the seedling by the planting arm 21 is maintained at the set value.

  When the seedling planting device 5 moves up and down with respect to the leveling float 24 following the ground contact with the rice field, the front part of the leveling float 24 swings up and down around the connecting pin 67 as shown in FIGS. Thus, one end portion of the outer 69a of the wire 69 is moved up and down by the guide member 68, and one end portion of the inner 69b of the wire 69 is pushed and pulled, so that the inner 69b of the wire 69 is operated. Thus, the control valve 73 is operated. As a result, the hydraulic oil is supplied to and discharged from the control valve 73 to the hydraulic cylinder 4, the hydraulic cylinder 4 contracts and extends, and the seedling planting device 5 moves from the rice field to the set height (planting of seedlings by the planting arm 21). The seedling planting device 5 is automatically driven up and down so that the attachment depth is maintained at the set value.

  As shown in FIG. 10A, the seedling planting device 5 (the transmission case 11 and the support frame 20) is obtained by removing the connection pin 67 from the support bracket 65 and attaching it to a different connection hole 65a of the support bracket 65. The height of the rear part of the leveling float 24 is changed. In this case, since the attitude of the leveling float 24 is slightly upward or slightly downward, the sensitivity adjustment lever 74 is operated to change the position of the other end of the outer 69a of the wire 69 as shown in FIG. Then, the amount of one end of the inner 69b of the wire 69 is changed so that the leveling float 24 is parallel to the seedling planting device 5 (the transmission case 11 and the support frame 20). Thereby, the height of the leveling float 24 with respect to the seedling planting device 5 (the transmission case 11 and the support frame 20) can be changed. From the surface where the seedling planting device 5 is maintained as described above. The planting depth of the seedling by the planting arm 21 can be changed by changing the set height.

  As described above, in the state where the leveling float 24 is parallel to the seedling planting device 5 (the transmission case 11 and the support frame 20), as shown in FIG. 15, the sensitivity adjustment lever 74 is operated, The position of the other end of the outer 69a of the wire 69 is changed, the amount of the one end of the inner 69b of the wire 69 is changed, and the attitude of the leveling float 24 is changed slightly upward or slightly downward. When the leveling float 24 is oriented upward, the area where the leveling float 24 contacts the surface becomes smaller, and the vertical swing of the front part of the leveling float 24 becomes insensitive, and the above-described raising and lowering of the seedling planting device 5 is performed. Control is insensitive. On the other hand, when the leveling float 24 is directed downward, the area where the leveling float 24 contacts the surface increases, and the vertical swing of the front part of the leveling float 24 becomes sensitive, and the seedling planting device 5 described above is used. The up / down control becomes sensitive.

[Another Embodiment of the Invention]
In the structure shown in FIG. 4, the right and left planting arms 21 may be rotatably supported by the support frame 25, and the seedling planting device 5 may be configured in a four-row planting type. Instead of transmitting power from the input shaft 12 to the drive shaft 16 via the transmission chain 17, power may be transmitted from the input shaft 12 to the drive shaft 16 via a transmission shaft (not shown). Good. The transmission case 11 may be arranged on the right side, and the support frame 20 may be arranged on the left side.
In the structure shown in FIGS. 12 and 13, a spring (not shown) for urging the right and left markers 57 from the retracted posture (state shown in FIG. 13) to the working posture (state shown in FIG. 12) is provided. You may comprise.

Overall side view of riding rice transplanter Overall plan view of riding rice transplanter Side view of seedling planting device Top view of the seedling planting device transmission case, support frame, and planting arm Plan view of the vicinity of the horizontal feed shaft of the seedling planting device Front view of the area around the seedling platform and vertical feed mechanism of the seedling planting device Side view near the rear of the link mechanism Side view around the support rail and support rod of the seedling planting device Rear view around the support rail and support rod of the seedling planting device Side view of leveling float and front view near guide member Top view of leveling float Front view near the marker for working posture Front view near the retracted marker Plan view near the marker for working posture Side view of the vicinity of the transmission case, control valve and sensitivity adjustment lever

Explanation of symbols

22 Seedling bed 23 Vertical feed mechanism 28, 30, 31 Right and left support members 32 Bush 33 Horizontal feed shaft 34, 35 Feed member 54a Input section 56 Vertical feed arm

Claims (2)

A seedling planting device is connected to the rear part of the traveling machine body through a link mechanism so as to be movable up and down, and a transmission case in the seedling planting device is arranged at a laterally laterally outer position than the link mechanism. And the left planting arm is rotatably supported, and the PTO shaft extending from the traveling machine body is connected to the front and rear input shaft provided in the front case portion of the transmission case. The right and left planting arms provided at the rear part of the transmission case are rotated and driven through an output shaft and a transmission mechanism, and are configured to take out the seedling seedling seedling and plant it on the rice field,
The right and left side portions of the rotationally driven lateral feed shaft are rotatably supported by a support member, the feed member is attached to the portion of the lateral feed shaft between the right and left support members, and the feed member is placed on the seedling. Connected to the stand,
When the transverse feed shaft is rotationally driven, the feed member is reciprocated laterally driven along the transverse feed shaft with a predetermined stroke, and the seedling table is reciprocated laterally driven with a predetermined stroke. As well as
A vertical feed arm is fixed to a portion of the lateral feed shaft that protrudes outward from the right and left support members from the right and left support members, and an input portion of a vertical feed mechanism provided in the seedling platform is used as a seedling platform. The right and left input units are provided on the right and left lateral outer sides of the right and left vertical feed arms, which are provided on the right and left sides, and are separated by a wider distance than the distance between the right and left vertical feed arms. Configured to be located,
When the seedling table reaches the right or left end of a predetermined stroke, the right or left input unit reaches the position of the right or left vertical feed arm and is driven by the right or left vertical feed arm. The longitudinal feed mechanism is configured to be driven, and the lateral feed shaft is provided on the side of one support member that supports the lateral feed shaft from the left-right output shaft provided in the case portion of the front portion of the transmission case. with Keru set interior and cover a mechanism for transmitting power to,
The one support member and the cover are fixed to the lateral outer side of the front case part of the transmission case, and the total width of the cover plus the left and right width of the cover and the front case part of the transmission case is added, A seedling planting device for a riding type rice transplanter that is narrower than the width between the planting claws of the right and left planting arms provided at the rear of the transmission case .   The seedling planting device for a riding type rice transplanter according to claim 1, wherein the transverse feed shaft is rotatably supported by the right and left support members via a synthetic resin bush.

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