JP2009022201A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling transplanter that is less likely to cause pulsations in a seedling planting tool, even when planting seedlings at relatively wide intervals. <P>SOLUTION: The seedling transplanter is equipped with a control arm 123b that operates the seedling planting tool 52a through eccentric gears 100 and 124 by an inter-row spacing speed change apparatus A and simultaneously controls the speed change of a speed change lever 124 for regulating the traveling speed of a traveling body 2 by a traveling power speed change gear to a high-speed side, when an inter-row spacing is set at a wider side by an inter-row spacing change lever 123 for selecting the operation speed of the seedling planting tool 52a by the inter-row spacing speed change apparatus A from proper speed stages in a plurality of stages and changing seedling planting intervals. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seedling transplanter capable of changing the seedling planting interval.

  In a seedling transplanter equipped with a seedling planting device with a float (sometimes referred to as a rice transplanter), the seedling planting tool of the seedling planting device runs around the central axis while the seedling transplanting machine advances. It rotates at a constant speed with respect to the speed, and seedlings are planted in the field at predetermined intervals.

  Using a seedling planting device equipped with an inconstant speed transmission mechanism such as an eccentric gear for sparse planting of seedlings, a seedling planting tool is operated via the inconstant speed transmission mechanism, so that seedlings are spread over a wide interval. When planting, there is a seedling transplanter that optimizes the movement trajectory of the seedling planting device to properly plant seedlings. However, if the seedling planting device operates at a high speed, A pulsation phenomenon sometimes occurred in the transmission of the attaching device.

In order to prevent this, the seedling provided with a mechanism for preventing the occurrence of a sneezing phenomenon in the transmission of the seedling planting device by providing a one-way clutch for preventing reverse rotation between the forward / reverse transmission and the inconstant speed transmission mechanism. A transplanter has been developed.
JP 2005-143340 A

In the seedling transplanting machine provided with the seedling planting device disclosed in Patent Document 1, since the inconstant speed transmission mechanism is mounted on the seedling planting device, when the seedlings are planted at relatively wide intervals, the shift lever When the traveling speed was changed to the high speed side by the above operation or the like, the operation speed of the seedling planting device was increased, and pulsation was likely to occur in the seedling planting tool.
Then, the subject of this invention is preventing the pulsation of the seedling planting tool by an inconstant speed transmission mechanism, and providing the seedling transplanting machine which can plant a seedling appropriately.

The above-mentioned problem of the present invention is solved by the following means.
According to the first aspect of the present invention, the traveling vehicle body (2), the engine (20) mounted on the traveling vehicle body (2), and the traveling power of the traveling vehicle body (2) are shifted by shifting the power from the engine (20). A traveling power transmission for shifting the speed, a transmission means (124) for adjusting the traveling speed output from the traveling power transmission, and a seedling planting that is connected to the rear part of the traveling vehicle body (2) for planting in a farm field In the seedling transplanter provided with the seedling planting part (4) having the tool (52a), the operation speed of the seedling planting tool (52a) with respect to the traveling speed can be changed, and the operation of the seedling planting tool (52a) Inter-strain transmission (A) having an inconstant speed transmission mechanism (100, 112) that transmits the speed at a non-constant speed so as to increase speed at the timing of seedling planting, and a seedling planting tool by the inter-strain transmission (A) A strain that changes the planting interval by changing the operating speed of (52a) When the change unit (123) and the inter-strain change unit (123) set the inter-strain on the wide side, the inter-strain transmission device (A) is planted through the unequal speed transmission mechanism (100, 112). The gear (52a) can be operated, and the seedling planting tool (52a) is operated via the inconstant speed transmission mechanism (100, 112), and at the same time, the traveling speed of the traveling power transmission is adjusted. It is a seedling transplanting machine provided with the control means (123b) which controls the gear shift to the high speed side of a means (124).

  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.

  In general, when the seedling planting interval (between plants) is set relatively wide, the operation of the seedling planting tool (52a) with respect to the traveling speed of the seedling transplanter in order to make the movement locus of the operation of the seedling planting tool appropriate. The seedling planting tool (52a) is operated so as to increase the speed at the seedling planting timing and the seedling planting tool (52a) is operated to plant the seedling. It becomes easy to do.

  In addition, since the operation of the seedling planting device becomes faster or slower due to unequal speed transmission, pulsation occurs in the transmission of the seedling planting device. In addition, when the seedling transplanter advances at a high speed, the operating speed of the seedling planting apparatus is amplified, so that the difference in the operating speed of the seedling planting apparatus increases and pulsation increases.

  However, according to the first aspect of the present invention, when the interval between the stocks is set relatively wide (in the case of sparse planting), the high-speed traveling can be performed by the restriction means (123b) for restricting the speed change means (124) to the high speed side. Since it can not be done, pulsation is suppressed and planting accuracy is improved.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG.1 and FIG.2 is the side view and top view of the riding type rice transplanter which are one Example of this invention. The riding type rice transplanter 1 has a seedling planting portion 4 mounted on the rear side of the traveling vehicle body 2 via an elevating link device 3 so as to be movable up and down so that an operator is not dropped from the aircraft body on the upper rear portion of the traveling vehicle body 2. A guard 5 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 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 traveling power transmission (not shown) in the case 12 and then separated into traveling power and externally extracted power. 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 a planting transmission shaft 26.

  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 an eight-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and reciprocates left and right to supply seedlings one by one to the seedling outlet 51a, and horizontally 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,... Includes a pair of left and right drawing markers 53 for drawing the aircraft path in the next stroke to the topsoil surface.

In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and middle floats 57 and side floats 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 57, 56 in contact with the mud surface of the field, the floats 55, 57, 56 slide while leveling the mud surface, and the seedling planting device 52, Seedlings are planted by ... Each of the floats 55, 57, and 56 is rotatably attached so that the front end side thereof moves up and down according to the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 is an angle-of-attack control sensor during planting work. The planting depth of the seedling is always kept 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 according to the detection result. .
A guard 5 is provided behind the seat 31 to prevent the worker from falling from the airframe when working on the rear step 36.

  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 side view of FIG. 3 and the rear view of FIG. 4 show the seedling planting part 4 (the drawing marker 53 is not shown) and the main part of the rotor support structure, and FIG. 5 shows the rotor 27, the floats 55 to 57, and the seedling planting. The principal part top view of the apparatus 52 part is shown.
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. Further, the lower end portion of the rotor support frame 68 is connected to a connecting member 71 rotatably attached to the transmission case 50.

  As shown in FIG. 5, the rotor 27 b in front of the center float 55 is arranged in front of the middle float 57 and the rotor 27 a in front of the side float 56 due to the arrangement position with the floats 55 to 57. Therefore, power to the drive shaft 70a of the rotor 27a is transmitted from the gear in the gear case 18 of the rear wheel 11 through the universal joint 72 and the like, and the drive shaft 70b of the rotor 27b is driven by the drive shafts 70a, 27a of both rotors 27a, 27a. Power is transmitted from a pair of chains (not shown) in a pair of left and right chain cases 73 to which power is transmitted from the end portion inside the vehicle body of 70a.

  A rotor support arm 67 is disposed behind the rear wheel 11 composed of three tires 11a to 11a on the left and right sides. The rotor 27 is vertically adjusted by supporting the rotor support arm 67 and the rotor drive shaft 70a behind the rear wheel 11. The rotor support frame 68 is joined between the three tires 11 a to 11 a on the left and right sides so that the joint between the rotor support frame 68 and the beam member 66 does not interfere with the rear wheel 11.

  Further, since the drive shaft 70b of the rotor 27b at the center of the machine body is only supported through a pair of left and right chain cases 73, 73, a pair of left and right chain cases 73, 73 are provided to reinforce the chain cases 73, 73. A reinforcing member 74 for bridging is provided.

Further, the rotor 27b is suspended through a spring 78 by a pair of link members 76 and 77 whose upper ends are supported by the beam member 66.
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 the mounting piece 74 rotatably supported by the reinforcing member 74.

  The upper and lower positions of the rotors 27 a and 27 b can be adjusted by a vertical position adjustment lever 81 via a rotor support frame 68, a rotor support arm 67 and a beam member 66, but the beam member 66 and the vertical position adjustment lever 81 are locked. The part is shown in FIG. 6A shows a cross-sectional view taken along line AA in FIG. 4, and FIG. 6B shows a side view seen from the direction of arrow A in FIG. 6A.

  The lower end portion of the vertical position adjusting lever 81 is connected by a link member 83 having a “U” cross section and a rod 84 penetrating the link member 83 in the horizontal direction. The link member 83 is integrally coupled to the lever boss 82. The lever boss 82 is composed of an L-shaped plate 82a in side view and a flat plate 82b integrated with the L-shaped plate 82a. A shaft supported by the support frame 65 at the center of the L-shaped plate 82a. A portion 85 is provided, and the L-shaped plate 82 a is rotatably supported by the shaft portion 85. The flat plate 82b of the lever boss 82 is disposed so as to be in contact with the cylindrical portion of the roller 86 having the protrusion 66a protruding from the beam member 66 as a rotation axis.

Therefore, when the vertical position adjusting lever 81 is rotated in the direction of arrow S in FIG. 4, the flat plate 82b of the lever boss 82 pushes up the roller 86, so that the beam member 66 moves upward. At this time, since the roller 86 contacts the flat plate 82b of the lever boss 82 while rotating, the operation load of the vertical adjustment lever 81 can be reduced, and since it is a rotating body, it is free from wear and good operability can be secured. The lever boss 82 pivots up and down, and the lever boss 82 is locked so as to be in contact with the cylindrical portion of the roller 86 having the projection 66a as a rotation axis. The beam member 66 is moved upward by the rotation in the direction of arrow S in FIG. Due to the upward movement of the projecting portion 66a, the end portion of the first link member 76 opposite to the connecting portion with the beam member 66 is also rotated upward about the beam member 66. By rotating the first link member 76 upward, the rotor 27b can be lifted upward via the second link member 77 and the spring 78. When the rotor 27b is moved upward, the rotor 27a is also simultaneously moved upward via the drive shaft 70b and the drive shaft 70a.
Since the rotor vertical position adjusting lever 81 is provided at substantially the center of the vehicle body 2, it is easy to balance left and right when the rotors 27a and 27b are moved up and down.

  Further, since the rotor support frame 68 moves upward by the rotation of the support arm 67 in the direction of arrow T (FIG. 3), the rotors 27a and 27b are stored in the storage position, that is, in the back side of the seedling stage 51. Can be moved.

  In this embodiment, by rotating the rotors 27a and 27b at a standard position of the rotor vertical position adjusting lever 81 at a height of 40 mm from the farm scene in the direction of arrow S in FIG. 4 is set so that it can be lowered by up to 15 mm from the standard position by turning in the direction opposite to the arrow S direction.

  As shown in FIG. 4, a plurality of outer leveling rotors (second side leveling rotors) 27a1 and 27a1 on both the left and right sides are supported by rotor extension drive shafts (second side drive shafts) 70a1 and 70a1 extending in the left-right direction. However, the rotor extension drive shafts 70a1 and 70a1 are detachably attached to the rotor drive shafts (first side drive shafts) 70a and 70a on the center side, and are attached to the rotor extension drive shafts 70a1 and 70a1. The leveling rotor (second side leveling rotor) 27a1, 27a1 to be mounted is removable.

  With the above configuration, when the seedling transplanter is stored in a warehouse or loaded on a truck, the outermost rotor drive shafts 70a1 and 70a1 and the rotors 27a1 and 27a1 attached to the rotor drive shafts 70a1 and 70a1 are combined. Can be removed to reduce the width of the aircraft.

  Further, when the seedling transplanter is advanced, mud, water, etc. collected in the field in front of the rotor 27 flows so as to push down adjacent planted seedlings from the outside of both ends, and the rotor extension drive shafts 70a1 at both left and right ends. , 70a1 and rotors 27a1, 27a1 at both ends attached to the rotor extension drive shafts 70a1, 70a1 are removed to reduce the left and right widths of the body, and the distance between the left and right inner rotors 27a, 27a and the adjacent planting seedlings is increased. Thus, the mud flow by the rotor 27 can be adjusted so as not to affect the seedling.

FIG. 7 shows a developed cross-sectional view in the planting clutch case 25 of the rice transplanter of this embodiment. In the planting clutch case 25 of FIG. 7, a stock transmission A having the following configuration is provided.
That is, power is transmitted to the planting clutch 91 from the transmission case 12 to the input shaft 92 via the transmission shaft. A large-diameter first gear 95 and an intermediate-diameter second gear 96 that are provided on an input shaft 92 that is rotatably supported at both ends of the clutch case 25 and are integrally disposed in parallel positions are slidable. The third gear 97 having a small diameter is loosely fitted to the input shaft 92. Clutch claws 96 a and 97 a that are engaged with each other are provided on opposite sides of the second gear 96 and the third gear 97, respectively. Further, the fourth gear 99 and the eccentric gear 100 are fixed to the input portion side of the input shaft 92.

  The output shaft 101 is disposed at a position parallel to the input shaft 92, and one end of the output shaft 101 is engaged with a planting clutch support shaft 91a, which will be described later, so that the clutch support shaft 91a passes through the clutch case 25. It connects with the seedling planting part 4 (FIG. 1) through the universal joint 103 provided outside.

  The output shaft 101 has a first gear 104 that is always meshed with the fourth gear 99 of the input shaft 92, a third gear 108 having an intermediate diameter integrated with a second gear 105 having a small diameter, and a fourth gear 109 having a large diameter. These gears 105 to 109 are loosely fitted to the output shaft 101. An inconstant speed switching clutch 110 is spline-engaged on the input end side of the output shaft 101, and an eccentric gear 112 that is always meshed with the eccentric gear 100 of the input shaft 92 is loosely fitted on the clutch case 25 side. Has been.

  In addition, clutch claws 110 a and 110 b are provided on both side surfaces of the inconstant speed switching clutch 110, and when one clutch pawl 110 a is engaged with the clutch pawl 104 a of the first gear 104 on the output shaft 101, output is performed. The driving force input from the input shaft 92 via any one of the gears 105, 108, and 109 integrated with the first gear 104 of the shaft 101 is output to the seedling planting unit 4 via the non-uniform speed switching clutch 110. The Further, the other clutch pawl 110b of the non-uniform speed switching clutch 110 is provided so as to be able to be engaged with a clutch pawl (not shown) of the eccentric gear 112 that is spline-engaged with the output shaft 101. When the clutch pawl 110b of the unequal speed switching clutch 110 and the clutch pawl of the eccentric gear 112 are locked, the seedling planting of the planting section 4 is performed at an unequal speed from the input shaft 92 via the output shaft 101 and the planting clutch support shaft 91a. Power is transmitted to the attachment 52a.

  The inter-stock shift shifter 115 is provided in a position parallel to the input shaft 92, and a cylindrical gap 25 a that can move in a direction parallel to the input shaft 92 is provided in the case 25. The shifter 115 is provided with four concave grooves 115a to 15d corresponding to the low speed side to the high speed side in order from the shifter operation end side, and a cylindrical gap 25a through which the inter-stock shift shifter 115 can move. Since the sphere 116 and the spring 117 that urges the sphere 116 toward the axial center of the shifter 115 are provided in the cylindrical portion of the wall surface of the case 25 provided in communication and in a direction orthogonal to the cylindrical gap 25a. When the sphere 116 is half-fitted into the concave groove 115a of the shifter 115, the shifter 115 cannot move, and when the shifter 115 is pushed and pulled by a force that overcomes the urging force of the sphere 116 and the spring 117, another concave groove 115b of the shifter 115 is obtained. The ball 116 is half-fitted into any one of -d, and the shifter 115 is held at that position.

Further, since the plate 115e fixed to the shifter 115 is locked between the first gear 95 and the second gear 96 having an intermediate diameter that are loosely fitted to the input shaft 92 and integrally provided in parallel with each other, By moving the inter-strain shift shifter 115 back and forth with respect to the advancing direction of the body, the plate 115b allows the first gear 95 and the second gear 96 that are spline-engaged with the input shaft 92 to move together in the left-right direction. ing.
The unequal speed switching clutch 110 is slidable in an arrow (A) or (B) direction of FIG. 7 by an unequal speed switching operation tool 119 provided outside the clutch case 25.

  A planting clutch 91 is provided in the clutch case 25 on the output end side of the output shaft 101, and the support shaft 91 a of the planting clutch 91 whose one end is supported by the inner wall of the case 25 is used as the center of the case 25. A spring 91b biasing toward the part side always biases the planting clutch 91. Further, the end portion of the planting clutch 91 on the case center side side can be locked with the output end portion of the output shaft 101 by clutch claws 91c and 101a. Further, on the outer peripheral portion of the planting clutch 91, the planting clutch 91 is moved toward the output end side of the case 25 by overcoming the urging force of the spring 91 b by the pressing of the planting clutch pin 91 d, and in the direction of the output shaft 101. On the other hand, since the inclined wall 91e that is inclined is provided, the engagement of the clutch 91c of the planting clutch 91 with the clutch pawl 101a of the output end of the output shaft 101 is released.

  The following inter-shaft transmission is possible by the transmission configuration of the inter-shaft transmission A having the above-described configuration. First, the pressing of the planting clutch 91 by the planting clutch pin 91d is released, and the planting clutch 91 is locked to the output shaft 101 by the urging force of the spring 91b.

  Next, the clutch pawl 110a of the non-uniform speed switching clutch 110 and the clutch pawl 104a on the side surface of the first gear 104 on the output shaft 101 are locked, and the inter-stock shift shifter 115 is inserted into the illustrated highest-speed concave groove 115a. If the inconstant speed switching operation tool 119 moves the shifter 121 to the arrow (b) side when the ball 116 is in the state of entering, the first gear 95 on the input shaft 92 and the second gear on the output shaft 101 are moved. When the gear 105 is engaged, the fastest power is transmitted to the planting clutch 91 via the output shaft 101 via the second gear 105 and the inconstant speed switching clutch 110.

  Further, when the shifter 121 is moved to the arrow (b) side by the unequal speed switching operation tool 119, the inter-stock shift shifter 115 is in a state in which the ball 116 has entered the concave groove 115b adjacent to the illustrated high-speed concave groove 115a. When the plate 115e slides to the right, the second gear 96 on the input shaft 92 meshes with the third gear 108 on the output shaft 101, and planted from the inconstant speed switching clutch 110 via the output shaft 101. Power is transmitted to the clutch 91 at the second highest speed.

  Furthermore, when the unequal speed switching operation tool 119 moves the shifter 121 to the arrow (B) side, the inter-stock shift shifter 115 enters the ball 116 into the third concave groove 115c from the illustrated highest speed concave groove 115a. In this state, the clutch pawl 96a of the second gear 96 on the input shaft 92 and the clutch pawl 97a of the third gear 97 are locked, and the third gear 97 and the fourth gear 109 on the output shaft 101 are engaged. Then, the third high-speed power transmission is performed to the planting clutch 91 via the output shaft 101 via the third gear 108, the second gear 105, the first gear 104, and the inconstant speed switching clutch 110.

Further, when the inconstant speed switching operation tool 119 moves the shifter 121 to the arrow (b) side and the inter-stock shift shifter 115 moves to the state where the ball 116 enters the illustrated minimum speed concave groove 115d, the input shaft 92 is moved. The third gear 97 and the fourth gear 109 on the output shaft 101 are transmitted, and the first gear 104 on the output shaft 101 and the fourth gear 99 on the input shaft 92 are meshed with each other at all times. The eccentric gear 100 on the input shaft 92, the eccentric gear 112 on the output shaft 101, the gear 112, and the non-constant speed switching clutch 110, and the planting clutch via the output shaft 101 that rotates integrally with the non-constant speed clutch 110. 91 is the lowest speed power transmission.
The engagement of the eccentric gears 100 and 112 causes the seedling planting tool 52a to move at a non-uniform speed because the operation speed is slower during other operations than when a seedling is planted.

In general, for example, when the strain is set relatively wide, seedlings are planted at an inconstant speed, so that the planting clutch 91 pulsates, and the pulsation tends to increase particularly when the clutch moves forward at a high speed.
Therefore, in this embodiment, as shown in the side view of FIG. 8A and the perspective view of FIG. 8B, the inter-stock lever 123 disposed on the right side of the seat 31 of the machine body is supported by the rotation center 123d. As shown in FIG. 7, the arm 123a integrated with the stock lever 123 moves the stock shift shifter 115 shown in FIG. 7 to an appropriate position (the ball 116 in the concave groove 115d in FIG. 7). Is set to the operating position of the planting clutch 91, and at the same time, the tip of the vehicle speed regulating arm 123b integrated with the inter-stock lever 123 is brought into contact with one end of the base of the speed change lever 124 that sets the speed change region of the travel transmission. Thus, the swinging of the shift lever 124 around the swinging shaft 124a is restricted to limit the vehicle speed, thereby stabilizing the seedling planting.

  Further, a sub-transmission lever 125 (manually selecting one of the shift stages of the sub-transmission apparatus that shifts the speed stage set by the transmission lever HST23, which is a transmission apparatus, to a higher, middle, or lower stage. When the operation speed is changed to the moving speed, which is the shift speed when traveling on the road, from the shift speed of the working speed used when planting seedlings by operating (see FIG. 9), a configuration that can release the vehicle speed restriction is adopted.

  FIG. 9 shows a configuration for this purpose. When the sub-shift lever 125 is operated in the direction of arrow A in FIG. 9 and shifted from the planting speed to the moving speed, it is attached to the stock lever 123 via the wire 126. The vehicle speed regulating arm 123b pivots about the pivot shaft 123e in the direction of arrow B (FIGS. 8 and 9), and the vehicle speed regulating arm 123b deviates from the moving region M of the speed change lever 124 shown in FIG. Thus, the vehicle speed regulation can be released.

  As shown in FIG. 8, the pivot shaft 123e is supported at one end by a projecting portion 123f projecting from the base of the inter stock lever 123, and the pivot shaft supporting cylinder portion 123c integrated with the vehicle speed regulating arm 123b is connected to the wire 126. Even if pulled, the spring is supported so as to be rotatable while being urged to return to the state shown in FIG.

  The seedling stage 51 is provided with a belt feed shaft 60 with a one-way clutch (drive shaft of the pulley 64) for moving the seedling feeding belt 51b in the direction of the field. As shown in the partial side view, the belt feed shaft 60 that moves the seedling feed belt 51b is linked to the seedling feed counter shaft 62 that is disposed adjacent thereto by a link mechanism. That is, the base of the counter arm 62a is fixed to the seedling feed counter shaft 62, and one end of the seedling feeding arm 60b is rotatably connected to the tip of the counter arm 62a, and the other end of the seedling feeding arm 60b is connected. The feed shaft piece 60a fixed to the belt feed shaft 60 is rotatably connected. Further, a dead point excess stopper 63 is disposed near the seedling feed counter shaft 62 so that the counter arm 62a does not exceed the dead point due to the connection relationship with the seedling feed arm 60b. Accordingly, the belt feed shaft 60 can be moved within the swing range (arrow B) via the seedling feed arm 60b while the swing range (arrow A) of the counter shaft 62 is regulated within a range not exceeding the dead point (arrow A). Swaying angle <swinging angle of arrow B).

  With the above configuration, the swing range of the counter shaft 62 is restricted within a range that does not exceed the dead point. Therefore, it is large in a small space by increasing the swing range of the belt feed shaft 61 with a link mechanism while preventing the dead point from being exceeded. The seedling feed amount can be obtained. Conventionally, the link mechanism itself had to be enlarged in order to set a swing range that prevents the dead center from being exceeded without a stopper.

  Further, as shown in the perspective view of FIG. 11, the one-way clutch of the belt feed shaft 60 is provided with a spring 60c for applying a urging force for returning the belt feed shaft 60 in the direction of arrow C. There is an effect of easily returning to the original position.

  Power is transmitted to the seedling planting tool 52a of the seedling planting device 52 from a drive unit (not shown) in the transmission case 50 via a drive chain 47 shown in FIG. 12, and the drive chain 47 is supported by the transmission case 50. The tension of the chain 47 can be adjusted by the formed leaf spring 48.

At the same time, the tension of the chain 47 can be adjusted by bringing the tip of the bolt 49 that can be inserted and removed in the direction perpendicular to the chain 47 from the outside to the inside of the transmission case 50 against the leaf spring 48.
Thus, by holding the chain 47 with the bolt 49 in an appropriate tension state, unnecessary loosening of the chain 47 can be prevented, and the pulsation of the operation of the planting tool 52a can be improved.

  Further, as shown in FIG. 13, a tip end of a bolt 49 that can be inserted and removed in the direction orthogonal to the chain 47 is attached from the outside to the inside of the transmission case 50, and the hole of the lock nut 45 is passed through for fastening the bolt. The cap 45a may be closed.

  Further, as shown in FIG. 14, a fuel tank 28 may be mounted in front of the airframe, and a member serving both as a fuel tank guard 2a and an auxiliary boarding step 2b may be provided in the bumper portion on the front surface of the airframe. By adopting such a configuration, the equipment cost can be reduced and a design effect can be obtained. Further, the fuel supply port 28a of the fuel tank 28 can be protected by the fuel tank guard 2a.

  Further, the height of the auxiliary step 2b to be attached to the fuel tank guard 2a is provided between the official reference height such as safety appraisal and the minimum height position of the fuel supply port 28a (including the pipe line portion) of the fuel tank 28. Thus, it is possible to prevent the fuel supply port 28a of the fuel tank 28 from being damaged at the same time as clearing the official reference height such as safety appraisal.

  ADVANTAGE OF THE INVENTION According to this invention, even if it takes widely between strains, the functional seedling transplanting machine which can improve a planting precision is obtained.

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 FIG. It is a principal part rear view of the support structure of the seedling stand of FIG. It is a principal part top view of the seedling planting part of FIG. It is a figure explaining the latching relationship of the up-and-down position adjustment lever and beam member of the rotor of the seedling planting part of FIG. It is an expanded sectional view of the planting clutch case of the riding type rice transplanter of FIG. They are the side view (FIG. 8 (a)) and perspective view (FIG.8 (b)) of the attachment part of the inter-stock lever of the riding type rice transplanter of FIG. 1, and a transmission lever. It is a figure explaining the connection relation of the subtransmission lever and vehicle speed control arm of the riding type rice transplanter of FIG. It is a principal part side view of the riding type rice transplanter of FIG. It is explanatory drawing of the attachment structure of the one-way clutch of FIG. It is a figure which shows the attachment structure of the chain and volt | bolt inside the transmission case of the seedling planting part of FIG. It is a figure which shows the attachment structure of the chain and volt | bolt inside the transmission case of the seedling planting part of FIG. It is the side view (FIG. 14 (a)) of the fuel tank provided in the body front of the rice transplanter of FIG. 1, its guard member part, and the perspective view (FIG.14 (b)) of a guard member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter 2 Traveling vehicle body 2a Fuel tank guard 2b Entry / exit auxiliary step 3 Lifting link device 4 Seedling planting part 5 Guard 10 Front wheel 11 Rear wheel 12 Mission case 13 Front wheel final case 15 Main frame 18 Rear wheel gear case 20 Engine 21 Belt drive 23 HST
25 Planting clutch case 25a Gap 26 Planting transmission shaft 27 (27a, 27b) Rotor 27a1, 27a1 Outer rotor 28 Fuel tank 28a Fuel supply port 30 Engine cover 31 Seat 32 Front cover 34 Handle 35 Floor step 36 Rear step 38 Spare seedling Platform 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connection shaft 45 Lock nut 45a Cap 46 Lifting hydraulic cylinder 47 Drive chain 48 Leaf spring 49 Bolt 50 Transmission case 51 Seedling platform 51a Seedling outlet 51b Seedling feed belt 52 Seedling planting device 52a Seedling planting tool 53 Drawing marker 55 Center float 56 Side float 57 Middle float 60 Belt feed shaft 60a Feed shaft piece 60b Seedling feed arm 60c Spring 62 Seedling feed cow Counter shaft 63 Stopper crossing prevention stopper 64 pulley 65 seedling planting support frame 65a support roller 65b side members 66 beam member 66a protrusion 67 support arm 68 rotor support frame 70a, 70b rotor drive shaft 70a1, 70a1 Rotor extension drive shaft 71 Connecting member 72 Universal joint 73 Chain case 74 Reinforcing member 74a Mounting piece 76, 77 Link member 78 Spring 81 Rotor vertical position adjusting lever 82 Lever boss 82a L-shaped plate 82b Planar plate 83 Cross section "U" shape Link member 84 Rod 85 Shaft 86 Roller 91 Planting clutch 91a Planting clutch support shaft 91b Spring 91c Clutch claw 91d Planting clutch pin 91e Slanting wall 92 Input shaft 95 First gear 96 Second gear 97 Third gear 96a, 97a Clutch pawl 99 Fourth gear 100 Eccentric gear 101 Output shaft 101a Clutch pawl 103 Universal joint 104 First gear 104a Clutch pawl 105 Second gear 108 Third gear 109 Fourth gear 110 Unequal speed switching clutch 110a, 110b Clutch Claw 112 Eccentric gear 115 Stock shift shifters 115a to 115d Groove 115e Plate 116 Ball 117 Spring 119 Unequal speed switching operation tool 121 Shifter 123 Stock lever 123a Arm 123b Vehicle speed regulating arm 123c Rotating shaft support cylinder portion 123d Rotation center 123e times Driving shaft 123f Protruding portion 124 Transmission lever 125 Sub transmission lever 126 Wire A Inter-strain transmission

Claims (1)

A traveling vehicle body (2), an engine (20) mounted on the traveling vehicle body (2), a traveling power transmission device that shifts power from the engine (20) to shift the traveling speed of the traveling vehicle body (2), and A seedling planting having a speed change means (124) for adjusting the traveling speed output from the traveling power transmission and a seedling planting tool (52a) connected to the rear part of the traveling vehicle body (2) for planting in a farm field. In the seedling transplanter with the part (4),
The operation speed of the seedling planting tool (52a) with respect to the traveling speed can be changed, and the operation speed of the seedling planting tool (52a) is transmitted at an infinite speed so as to increase at the timing of seedling planting. Inter-strain transmission (A) having a transmission mechanism (100, 112);
The inter-strain changing means (123) for changing the planting interval of the seedlings by changing the operating speed of the seedling planting tool (52a) by the inter-strain transmission (A),
When the inter-strain changing means (123) sets the inter-strain to the wide side, the inter-strain transmission (A) operates the seedling planting tool (52a) via the inequal speed transmission mechanism (100, 112). With a configuration that can
The shifting of the shifting means (124) for adjusting the traveling speed of the traveling power transmission device is controlled at the same time as the seedling planting tool (52a) is operated via the inconstant speed transmission mechanism (100, 112). A seedling transplanting machine comprising a regulating means (123b).

Images