JP5523771B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter including a traveling machine body and a planting machine connected to the traveling machine body.

  A planting work machine connected to the traveling machine body is supported by a seedling stage and a lower part of the seedling stage so that the posture can be changed, and the seedling on the seedling platform is scraped off and planted in the field by the posture change. A claw, a horizontal feed mechanism that slides the seedling platform left and right relative to the planting claw, and a vertical feed mechanism that feeds the seedling placed on the seedling platform downward, and the vertical feed mechanism by swinging upward A vertical feed lever is provided on the vertical feed mechanism side, and a vertical feed arm that rotates up and down is provided on the horizontal feed mechanism side. The vertical feed arm that rotates at the left and right slide ends of the seedling stand is on standby. The vertical feed lever and the vertical feed arm are arranged to contact the vertical feed lever of the posture from the bottom and push up the vertical feed lever to swing upward, and the power of the traveling system is branched to the planting work machine side Branching mechanism is provided, and the branching mechanism branches A transplanting machine that drives the planting claws to change the posture and drives the seedling platform to slide left and right through the lateral feed mechanism and drives the vertical feed arm to rotate up and down by transmitting the generated power to the planting work machine side. Conventionally known.

  In the transplanter configured as described above, the reverse rotation power of the traveling system may be transmitted to the branch mechanism during reverse travel, and when this reverse rotation power is directly transmitted to the vertical feed arm, There is a case where the vertical feed lever is pressed down and swung downward by contacting from the upper side. In this case, the vertical feed mechanism is driven in reverse, but the vertical feed mechanism, the vertical feed lever in the standby position, etc. Is normally not configured to allow the reverse drive state because only the forward drive for transporting the seedlings on the seedling stand downward is sufficient and does not require the reverse drive.

  For this reason, if the reverse rotation power is transmitted to the vertical feed arm, the vertical feed mechanism may be damaged. To prevent this, when the reverse rotation power is transmitted to the branch mechanism, it is to the planting work machine side. 2. Description of the Related Art A transplanter that cuts and operates a planting clutch that interrupts power transmission is known. By the way, it is necessary to stop the planting claw in a predetermined posture such as an accommodation posture so as not to get in the way during non-working traveling or the like. Therefore, even if the planting clutch is cut, the planting clutch is often configured so that the cutting operation is not completed until the planting claw is switched to the predetermined posture. In this case, until the cutting operation is completed. There is a possibility that reverse rotation power is transmitted to the vertical feed arm during this period.

  For this reason, in addition to the above-mentioned planting clutch, a transplanting machine provided with a one-wear clutch (one-way clutch) that transmits only the forward rotation power to the longitudinal feeding arm, and downward swinging of the longitudinal feeding lever are allowed. A transplanter shown in Patent Document 1 is known which is provided with an allowance mechanism that does not drive the longitudinal feed mechanism during the downward swing.

Japanese Patent Laying-Open No. 2005-210994 (FIG. 10)

However, in either case of providing a permissible mechanism that allows the vertical feed lever to swing downward by vertically swinging the vertical feed mechanism or providing a one-way clutch that prevents reverse rotation of the vertical feed arm. In addition to the planting clutch that interrupts the power transmission to the planting machine side, a special member is required separately, which makes it difficult to keep the manufacturing cost low.
The present invention solves the above-described problem, and includes a seedling platform that moves left and right, and a planting claw that scrapes seedlings on the seedling platform at the left and right stroke ends of the seedling platform and plants them in a field. In addition to the planting clutch that intermittently drives the power transmission to the planting work machine, which is composed of a seedling stand, vertical feed mechanism, planting claw, etc. It is an object of the present invention to provide a transplanter capable of efficiently and inexpensively preventing transmission of reverse rotation power to a vertical feed mechanism without providing a separate member.

In order to achieve the above object, in the transplanter of the present invention, firstly, the planting work machine 6 connected to the traveling machine body 3 is supported on the seedling stage 17 and below the seedling stage 17 so that the posture can be changed. Then, the planting claw 18 scrapes off the seedling on the seedling table 17 by the posture change to plant it in the field, the lateral feed mechanism 19 that slides the seedling platform 17 to the left and right with respect to the planting claw 18, and the seedling platform A vertical feed mechanism 21 that feeds the seedling placed on the table 17 downward, and provided with vertical feed levers 33L and 33R on the vertical feed mechanism 21 side for vertically feeding the vertical feed mechanism 21 by swinging upward; A vertical feed arm 27 that operates to rotate up and down is provided on the side of the horizontal feed mechanism 19, and the vertical feed arm 27 that rotates at the left and right slide ends of the seedling platform 17 contacts the vertical feed levers 33 </ b> L and 33 </ b> R in a standby posture from below. In contact with the longitudinal feed lever 3 The vertical feed levers 33L and 33R and the vertical feed arm 27 are arranged and configured to push up L and 33R and swing upward, and a branch mechanism 58 for branching the power of the traveling system to the planting work machine 6 side is provided. In a transplanting machine that drives the planting claw 18 to change its posture by the power branched by the mechanism 58, drives the seedling stage 17 to slide left and right via the lateral feed mechanism 19, and drives the vertical feed arm 27 to rotate up and down. In the middle of the power transmission path between the mechanism 58 and the planting work machine 6, a planting clutch 66 that interrupts power to the planting work machine 6 is provided, and the rotating body 73 that constitutes the planting clutch 66 has a predetermined phase. When it is located outside the cutting range L, which is the range, a regulating means 78 for stopping the planting claw 18 in a predetermined posture by regulating the cutting operation of the planting clutch 66 is provided. Longitudinal feed arm 27 by the motive force is transmission is vertical feed lever 33L, said longitudinal feed lever 33L abuts from above 33R, when setting the cutting range L in order to prevent to lower swing 33R, The rotation position of the rotating body 73 from the push-up completion position P2 until the vertical feed arm 27 and the vertical feed levers 33L and 33R are separated from each other is located within the cutting range L.

Secondly, the planting work machine 6 connected to the traveling machine body 3 is supported on the seedling stage 17 and below the seedling stage 17 so that the posture can be changed. A planting claw 18 for scraping seedlings and planting them in a field, a lateral feed mechanism 19 for moving the seedling platform 17 to slide left and right relative to the planting claw 18, and a seedling placed on the planting platform 17 downward And a vertical feed lever 33L, 33R for vertically driving the vertical feed mechanism 21 by swinging upward is provided on the side of the vertical feed mechanism 21 and a vertical feed arm 27 that rotates up and down is laterally fed. The vertical feed arm 27 provided on the mechanism 19 side and rotating at the left and right slide ends of the seedling platform 17 contacts the vertical feed levers 33L and 33R in the standby posture from below to push the vertical feed levers 33L and 33R. Raise and swing upward The vertical feed levers 33L, 33R and the vertical feed arm 27 are arranged and provided with a branch mechanism 58 for branching the power of the traveling system to the planting work machine 6 side, and planting is performed by the power branched by the branch mechanism 58. In the transplanting machine that drives the nail 18 to change its attitude, drives the seedling stage 17 to slide left and right via the lateral feed mechanism 19 and drives the vertical feed arm 27 to rotate up and down, the power of the branch mechanism 58 and the planting work machine 6 When the planting clutch 66 that intermittently powers the planting work machine 6 is provided in the middle of the transmission path, and the rotating body 73 that constitutes the planting clutch 66 is located outside the cutting range L that is a predetermined phase range Is provided with regulating means 78 for stopping the planting claw 18 in a predetermined posture by regulating the cutting operation of the planting clutch 66, and the reverse feed power is transmitted to the branch mechanism 58 for longitudinal feeding. Over arm 27 is vertical feed lever 33L, said longitudinal feed lever 33L abuts from above 33R, when setting the cutting range L in order to prevent to lower swing 33R, the longitudinal feed arm 27, longitudinal feed lever 33L, the lifting start position P ₁ of the 33R, time of rotating the push-up completion position P _2, the cutting as the rotating body 73 is rotated to a position other than the cutting range L of the cutting range L The feature is that the range L is set .

  According to the transplanter of the present invention configured as described above, an allowance mechanism that allows the vertical feed lever to swing downward by swinging upward, and a vertical feed lever that pushes the vertical feed lever by rotation. Without providing a special member such as a one-way clutch to prevent the reverse feed of the vertical feed arm, the planting claws in the rotating body constituting the planting clutch that interrupts the power to the planting machine are stopped in a predetermined posture. The vertical feed arm is prevented from coming into contact with the vertical feed lever in the retracted posture from the upper side and swinging the vertical feed lever downward by simply setting the cutting range, which is the range located when There is an effect that the vertical feed mechanism can be efficiently prevented from being damaged without substantially increasing the manufacturing cost.

It is the whole riding rice transplanter to which the transplanter of the present invention is applied. It is a principal part front view which shows the structure of a planting work machine. It is a principal part top view which shows the structure of a planting work machine. It is a principal part side view of the planting work machine which shows the structure of a planting nail | claw and a vertical feed lever. It is a power transmission system diagram of this riding rice transplanter. It is an expanded view which shows the principal part of the power transmission structure of this riding rice transplanter. (A) is a rear view showing the configuration of the planting clutch, (B) is a plan view of the main part when the planting clutch is connected, and (C) is the main part plane when the planting clutch is disconnected. FIG. It is a sectional side view of a transmission case which shows a setting means of a cutting operation range. (A), (B) is the side view and principal part side view which show the structure of the link mechanism which connects a planting operation lever and a shifter lever. (A), (B) is the rear view and side view which show the structure of the linkage mechanism which connects a driving | running lever and an action | operation side arm. It is a principal part side view of the planting work machine which shows the other example of the setting of a cutting | disconnection operation | movement range. It is a principal part side view of the planting work machine which shows the other example of the setting of a cutting | disconnection operation | movement range. It is a principal part cross-sectional view which shows the internal structure of a transmission case regarding another embodiment of this invention.

Embodiments of the present invention will be described below based on the illustrated example.
FIG. 1 is an overall side view of a riding rice transplanter to which a transplanter of the present invention is applied. The illustrated riding rice transplanter includes a traveling machine body 3 having a pair of left and right front wheels 1, 1 and rear wheels 2, 2, and a planting that is connected to a rear end portion of the traveling machine body 3 through a lifting link 4 so as to be movable up and down. And a work machine 6.

  A steering unit 9 on which an operator enters is installed behind the hood 8 that houses the engine 7 (see FIG. 5) in the traveling machine body 3. A steering handle 12 for performing a steering operation is disposed in front of a seat 11 on which an operator is seated in the control unit 9, and power to the planting work machine 6 is intermittently moved to the side of the seat 11 by a back-and-forth swing operation. A planting operation lever 13 that is an operation tool to be operated is supported, and a traveling lever 14 that is a traveling operation tool is provided on one side (left side in the illustrated example) side of the steering handle 12.

  The traveling lever 14 performs a forward / reverse switching operation by a left / right swinging operation from the neutral position, and a speed increasing operation to a forward side by a forward swinging operation in a state of swinging to the left / right one side, while The speed increasing operation to the reverse side is performed by the backward swinging operation in the state of swinging to the other side.

Next, the configuration of the planting work machine will be described based on FIGS.
2 and 3 are a main part front view and a main part plan view showing the configuration of the planting machine. As shown in FIGS. 1 to 3, the planting work machine 6 includes a hollow rectangular columnar horizontal frame 16 that is supported by the elevating link 4 in a freely rolling manner and extends in the left-right direction, and upward from the side of the horizontal frame 16 toward the front. A seedling stand 17 that is steeply inclined and places seedlings on the back side, and a posture changeable under the seedling placement stand 17 is scraped off and the seedlings on the seedling stand 17 are scraped off and planted in the field. A planting claw 18 to be attached, a lateral feed mechanism 19 that slides the seedling platform 17 to the left and right with respect to the horizontal frame 16, the planting claw 18, and the like, and a planting claw 18 for seedlings placed on the seedling platform 17 And a longitudinal feed mechanism 21 that conveys downward to the side.

  The lateral feed mechanism 19 includes a transmission case 22 that protrudes upward from the left and right side (right side in the illustrated example) ends of the horizontal frame 16, and the machine body so as to be positioned above the horizontal frame 16 from the transmission case 22. A lateral feed shaft 23 that protrudes inwardly and is supported so as to be able to rotate back and forth around the shaft, and has a cylindrical portion that covers the outer peripheral surface of the lateral feed shaft 23 and is slidable in the axial direction. 23, the moving body 24 supported by 23, the connecting bracket 26 that integrally connects the moving body 24 and the seedling platform 17, and the projecting side end of the lateral feed shaft 23. A vertical feed arm 27 that rotates up and down.

  A spiral guide groove 23a that slides and guides the movable body 24 is formed on the outer periphery of the lateral feed shaft 23. When the lateral feed shaft 23 is driven to rotate about the axis, the movable body 24 moves along the guide groove 23a. The lateral feed shaft 23 is reciprocated left and right, and accordingly, the seedling mount 17 is reciprocated left and right.

  The vertical feed mechanism 21 is arranged on the axial center of the vertical feed shaft 28 and the vertical feed shaft 28 in the left-right direction arranged on the lower front side of the seedling platform 17 and is supported so as to be rotatable back and forth around the axis. Winding around a cylindrical driving roller 29, a cylindrical driven roller 31 disposed in the left-right direction, which is disposed above each driving roller 29 and supported so as to be rotatable around the axis, and the driving roller 29 and the driven roller 31. The vertical feed belts 32A, 32B, 32C and 32D, a pair of left and right vertical feed levers 33L and 33R supported by the vertical feed shaft 28 so as to be swingable up and down, and left and right vertical feed levers 33L and 33R are connected to each other. A connecting rod 34 that vertically swings both the vertical feed levers 33L and 33R, and a drive that is installed on each of the vertical feed levers 33L and 33R and that only supports the power when the vertical feed levers 33L and 33R swing upward. Roller 29 side It includes a longitudinal feeding clutch 36 is a one-way clutch for transmitting, the.

  A pair of driving rollers 29 and 29 and driven rollers 31 and 13 arranged in parallel on the left and right are provided as a set, and the same number of driving rollers 29 and driven rollers 31 as the number of planting strips (four sets in the illustrated example) are provided. One longitudinal feed belt 32A, 32B, 32C, 32D is wound around the left and right drive rollers 29, 29 and the left and right driven rollers 31, 31 in each set.

  The left and right vertical feed levers 33L and 33R are pushed up by the contact from the lower side by the vertical feed arm 27 of the lateral feed mechanism 19 that rotates in the forward direction at the stroke ends that are the left and right slide ends of the seedling platform 17, respectively. The standby posture inclined downward toward the front is switched to the action posture inclined upward toward the front. Then, after the vertical feed levers 33L and 33R are switched to the acting posture, when the vertical feed arm 27 is further rotated in the forward rotation direction, the contact between the vertical feed arm 27 and the vertical feed levers 33L and 33R is released, and the vertical feed levers 33L and 33R are released. The vertical feed levers 33L and 33R are returned from the acting posture to the standby posture by the elastic force of an elastic member 37 such as a helical spring provided at the base end portion of the feed levers 33L and 33R.

  In this manner, at the left and right stroke ends, the vertical feed arm 27 that rotates in the forward direction rotates the vertical feed levers 33L and 33R in the order of standby posture → action posture → standby posture. When it is swung upward, the forward rotation power is transmitted to the drive roller 29 side by the longitudinal feed clutch 36, while when it is swung downward from the action posture to the standby posture, the longitudinal feed clutch 36 acts. Transmission of reverse rotation power from the longitudinal feed levers 33L, 33R to the drive roller 29 is interrupted. That is, the vertical feed levers 33L and 33R are configured to drive the vertical feed mechanism 21 by swinging upward.

  More specifically, the left vertical feed lever 33L is arranged so as to be in contact with the vertical feed arm 27 at the right stroke end of the seedling platform 17, and the left side of the planting work machine 6 is arranged by the vertical feed lever 33L. The longitudinal feed belts 34C and 34D disposed in the half are longitudinally driven. On the other hand, the right vertical feed lever 33R is disposed so as to be in contact with the vertical feed arm 27 at the left stroke end of the seedling stage 17, and the right half of the planting work machine 6 is arranged by the vertical feed lever 33R. The longitudinal feed belts 34A and 34B disposed in the vertical drive are driven longitudinally. However, as described above, both the vertical feed levers 33L, 33R are configured to integrally swing up and down by the connecting rod 34, so that all the vertical feed belts 34A, 33B, 33C, 33D are all at the same time. The seedlings on all the longitudinal feeding belts 34A, 34B, 34C, 34D of the seedling placing table 17 are collectively conveyed downward.

  FIG. 4 is a side view of the main part of the planting machine showing the configuration of the planting claws and the vertical feed lever. The above-mentioned planting claws 18 are provided in the same number as the number of planting strips as a pair, and the posture can be changed to the side of the rear end portion of the planting case 38 that is integrally extended rearward from the horizontal frame 16. It is supported. Specifically, the tip end side of the planting claw 18 is moved and driven by the engine power so as to draw a movement locus D that is vertically long when viewed from the side, and is placed on the seedling stand 17 so as to be positioned above the movement locus D. A planting claw 18 is configured to be switchable between a scraping posture for scraping off seedlings and a planting posture for planting seedlings that extend below the movement trajectory D and are scraped off to the field.

In addition, the planting claw 18 descends and passes through the rear part of the movement trajectory D in the process of switching from the scraping posture to the planting posture, and the planting claw 18 is stored in a predetermined range at this time. state and while the lowering side storage range R ₁ comprising, planting claw 18 is passed to increase the front portion of the movement locus D in shifting operation of the scraping winding position from the planting position, in the middle of this time predetermined range is raised side storage range R ₂ to be a state in which the planting claw 18 is accommodated.

  As shown in FIGS. 2 and 3, the planting case 38 is provided at each of the left and right ends of the horizontal frame 16, and the planting claws 18 are provided on each side surface of the two planting cases 38 in the left-right direction. It is supported via a planting shaft 39. Incidentally, the planting shaft 39 in the left-right direction is inserted and supported in the rear part of the planting case 38 so as to be rotatable around the axis in a state of projecting from the planting case 38 to the left and right sides. By transmitting the engine power to 39, the planting claw 39 is driven to move along the above-mentioned movement trajectory D.

  A horizontal planting transmission shaft 41 is supported in the horizontal frame 16 so as to be able to rotate back and forth around the axis, and a front / rear input shaft to which engine power is input at the horizontal center of the horizontal frame 16. The rear end portion of 42 is inserted. The power of the input shaft 42 is transmitted to the planting transmission shaft 41 through a pair of bevel gears 43 and 44, and drives the lateral feed shaft 23 and the planting shaft 39, thereby, as described above, the lateral feed mechanism. 19, The vertical feed mechanism 21 and the planting claw 18 are driven.

  Specifically, a main sprocket 46 attached to one end (right side in the illustrated example) of the planting transmission shaft 41 located in the transmission case 22 and rotating integrally with the planting transmission 41 shaft, and the transmission case A driven sprocket 47 that is attached to one end (right side in the illustrated example) of the lateral feed shaft 23 located within the shaft 22 and rotates integrally with the lateral feed shaft 23, and is wound around the main drive sprocket 46 and the driven sprocket 47. The power transmission from the planting transmission shaft 41 to the lateral feed shaft 23 is performed by the lateral feed chain 48 that transmits power from the main drive sprocket 46 to the driven sprocket 47.

  For power transmission of each planting case 38 to the planting shaft 39, a main sprocket 49 attached to the planting transmission shaft 41 in the horizontal frame 16 and rotating integrally with the planting transmission shaft 41, and a planting case 38, a driven sprocket 51 which is attached to the middle portion of the planting shaft 39 and rotates together with the planting shaft 39, and is driven by the main sprocket 49 and the driven sprocket 51 to chain power from the main sprocket 49 to the driven sprocket 51. A transmitting planting chain 52 is used.

  In the planting work machine 6 having the above-described configuration, the lower end placed on the seedling stage 17 in the process in which the seedling stage 17 is slid from one side of the left and right stroke ends to the other side by the lateral feed mechanism 19. The horizontal row of seedlings is scraped off and planted in the field. When the seedling platform 17 reaches the stroke end, it is scraped by the vertical feed mechanism 21 to the lower end of the seedling platform 17 that has been scraped to become an empty space. A row of seedlings is supplied. The seedlings on the seedling mount 17 are sequentially planted in the field by alternately repeating the downward conveyance of the seedlings at the stroke end and the sliding movement between the left and right stroke ends.

Next, the power transmission configuration of the passenger rice transplanter will be described with reference to FIGS.
FIG. 5 is a power transmission system diagram of the passenger rice transplanter, and FIG. 6 is a development view showing a main part of the power transmission configuration of the passenger rice transplanter. The power from the engine 7 is belt-transmitted to the HST 53 that is a hydraulic stepless transmission, and is steplessly shifted, and then output to the travel transmission shaft 56 in the mission case 54.

  The power of the traveling transmission shaft 56 is transmitted to the pair of left and right front wheels 1 and 1 and the rear wheels 2 and 2 through a traveling transmission 57 that changes gears by changing the meshing of the gears. This traveling system power is branched to the planting work machine 6 side by the branching mechanism 58.

  The branch mechanism 58 includes a branch shaft 59 that is arranged in parallel with the travel transmission shaft 56 and is rotatably supported around the shaft, and a gear that transmits power from the travel transmission shaft 56 to the branch shaft 59 by meshing the gears. And a mechanism 61. The gear mechanism 61 is configured to change the gear ratio of the power transmitted to the branch shaft 49 by changing the meshing of the gears.

  The power of the branch shaft 59 is always meshed with the main driving bevel gear 62 via the main driving bevel gear 62 that is attached to the branch shaft 59 and rotates integrally with the branch shaft 59, so that it can freely rotate to the take-out shaft 63 in the front-rear direction (free rotation). Geared to the supported driven bevel gear 64. The power of the driven bevel gear 64 is intermittently transmitted to the take-out shaft 63 via the planting clutch 66.

  A rear end portion of the take-out shaft 63 protrudes rearward from the mission case 54, and a front end portion of a relay shaft 68 that rotates integrally with the take-out shaft 63 is connected to the rear end portion by a coupling 67. One end of a connecting shaft 71 is connected to the rear end of the relay shaft 68 via a universal joint 69, and the above-described input shaft 42 is connected to the other end of the connecting shaft 71 via a universal joint 72. The front ends of the are connected.

  As described above, the power branched by the branch mechanism 58 is intermittently transmitted to the input shaft 42 via the planting clutch 66 provided in the middle of the power transmission path from the branch mechanism 58 to the take-out shaft 63. The power of the input shaft 42 drives the lateral feed mechanism 19, the vertical feed mechanism 21, and the planting claw 18 of the planting machine 6 as described above.

  FIG. 7A is a rear view showing the structure of the planting clutch, FIG. 7B is a plan view of the main part when the planting clutch is connected, and FIG. 7C is the main part when the planting clutch is disconnected. FIG. The planting clutch 66 is formed integrally with the driven bevel gear 64 described above, and is slid in the axial direction with a cylindrical transmission 70 that is rotatably mounted on the take-out shaft 63 so as to rotate integrally with the driven bevel gear 64. A cylindrical switching body (rotating body) 73 that is supported by the take-out shaft 63 and rotates integrally with the mounting shaft 63, and a transmission body 70 and a switching body 73 that are formed on opposite sides of each other and mesh with each other. The clutch claws 70a and 73a are fitted, and an elastic member 74 made of a coiled compression spring or the like that is externally mounted on the mounting shaft 63 and elastically biases the switching body 73 toward the transmission body 70.

  Then, when the switching body 73 slides toward the transmission body 70 by the urging force of the compression spring 74, the pair of clutch claws 70a and 73a mesh with each other, the planting clutch 66 is connected, and the take-out shaft 63 is transmitted. When the switching body 73 is slid to move away from the transmission body 70 against the elastic force of the compression spring 74 while rotating integrally with the body 70, the pair of clutch claws 70a and 73a are separated from each other and meshed with each other. Thus, the planting clutch 66 is disengaged, and the transmission 70 is in the idle state with respect to the take-out shaft 63.

  Incidentally, the intermittent operation means of the planting clutch 66 will be described. A circular flange 76 is integrally extended at the end of the switching member 73 on the side of the clutch pawl 73a, and the distal end side is separated and close to the transmission body 70. A shifter lever 77 whose base end is supported on the transmission case 54 side so as to be swingable to the side is provided, and the shifter lever 77 is swung to the side away from the transmission body 70, whereby the switching body 73 is moved to the shifter lever. On the other hand, the planting clutch 66 is operated to be cut by being pushed to the cutting side by the tip of 77, and the switching body 73 by the tip of the shifter lever 77 is operated by swinging the shifter lever 77 to the side close to the transmission body 70. Is released, and the planting clutch 66 is connected by the elastic force of the compression spring 74.

The planting clutch 66 has a regulating mechanism (regulating means) 78 that regulates the cutting operation of the planting clutch 66 when the rotational position (phase) of the switching body 73 is outside a predetermined range (cutting range) L. Is provided. This regulation mechanism 78, when the planting claw 18 is positioned at the descending side storage range R ₁ or a range other than the rising side storage range R ₂ of movement trajectory D regulates the cutting operation of the planting clutch 66 It is configured as follows. For this reason, the planting clutch 66 is disconnected and the planting claw 18 is stopped in a scraped posture or a planting posture, thereby preventing non-working traveling such as traveling on the road.

  Specifically, the restriction mechanism 78 includes a notch 76a formed by cutting out at the peripheral edge of the flange 76 of the switching body 73 and a restriction pin 79 protruding from the transmission case 54 side to the switching body 73 side. Has been. When the locking pin 79 protruding to the flange 76 side of the switching body 73 is located at a position other than the notch 76 a of the flange 76 in the rear view, the switching is performed by the contact between the locking pin 79 and the flange 76. While the sliding movement of the body 73 to the side away from the transmission body 70 is restricted and the cutting operation of the planting clutch 66 is restricted, the locking pin 79 is located in the notch 76a of the flange 76 in the rear view. If it is located (when it is located in the cutting range L of the switching body 73), the flange 76 rubs through the locking pin 79 through the notch 76a, and the cutting operation of the planting clutch 66 is allowed.

That is, by adjusting the notch 76a forming position and the formation range of the flange 76 of the diverter 73 as appropriate to set the cutting range L, the planting claw 18 movement trajectory D lowering side storage range R ₁ or restrict the disengagement actuation planting clutch 66 in the case which is located in a range other than the rising side storage range R _2, whereby, when switching the operation of the planting clutch 66, the distal end side of the descending side storage range R ₁ or raised side the planting claw 18 stops at a predetermined position located in the storage range R _2.

In order to apply the above means, the diverter 73 is positioned always descending side storage range R ₁ or elevated side storage range R ₂ is the distal end side of the planting claw 18 when positioned in the cutting range L The phase of the take-out shaft 63 and the planting shaft 39 should not gradually shift over time, and the transmission of the power transmitted to the take-out shaft 63 so as to satisfy this condition The ratio and the gear ratio of the power transmitted to the planting shaft 39 are set in association with each other.

  In addition to this, when the seedling stage 17 reaches the left and right stroke ends and the vertical feed mechanism 21 is operated, the lateral feed shaft is arranged so that the position of the tip side of the planting claw 18 is always constant. The speed ratio of the power transmitted to 23 and the speed ratio of the power transmitted to the planting shaft 39 are set in association with each other. After being scraped off reliably, the vertical feed mechanism 21 feeds the seedlings on the seedling stand 17 downward. For this reason, when the switching body 73 is rotating in the cutting range L, the vertical feed arm 27 is always located in the cutting operation range W that is a predetermined range.

  FIG. 8 is a side sectional view of the transmission case showing the setting means for the cutting operation range. The cutting operation range W can be changed as appropriate by changing the rotational position of the lateral feed shaft 23 relative to the take-out shaft 63. Specifically, the phase of the main sprocket 46 or the driven sprocket 47 in the transmission case 22 is changed. The cutting operation range W is changed by changing.

  This phase setting will be described in detail. As shown in the figure, the main sprocket 46 and the planting transmission shaft 41 are placed at the rotational position where the alignment marks 46a and 41a marked on the planting transmission shaft 41 are closest to each other. 41, and the driven sprocket 47 is mounted and fixed to the transverse feed shaft 23 at the rotational position where the alignment marks 47a, 23a marked on the driven sprocket 47 and the transverse feed shaft 23 are closest to each other. By rotating the main sprocket 46 and the driven sprocket 47 so that the marks 23a, 41a, 46a, 47a are positioned in a straight line, the transverse feed chain 48 is wound around the main sprocket 46 and the driven sprocket 47 in advance. The above four alignment marks 23a, 41a, 46a Position of 47a is defined.

  In this riding rice transplanter, the gear ratio of the power transmitted to the lateral feed shaft 23 is changed by exchanging the main drive sprocket 46 or the driven sprocket 47, and the lateral feed with respect to the driving speed of the planting claw 18 is changed. The drive speed of the shaft 23 is changed.

Next, the operation means of the planting clutch 66 will be described with reference to FIGS.
FIGS. 9A and 9B are a side view and a main part side view showing the configuration of a link mechanism that connects the planting operation lever and the shifter lever. The planting operation lever 13 on the control unit 9 side and the shifter lever 77 on the mission case 54 side are connected via a link mechanism 81. The link mechanism 81 includes an operation side arm 82 that swings back and forth integrally with the shifter lever 77, an operation side arm 83 that swings back and forth integrally with the planting operation lever 13, and a work side arm 82 and an operation side arm 83. A connecting rod 84 in the front-rear direction that is connected and moved back and forth is provided, and the planting clutch 66 is intermittently operated by swinging the planting operation lever 13 back and forth.

  FIGS. 10A and 10B are a rear view and a side view showing the structure of the linkage mechanism that connects the travel lever and the operating arm. The traveling lever 14 on the side of the control unit 9 performs forward / reverse switching operation and traveling speed change operation via the HST 53, and the traveling lever 14 includes a wire 86 that is pulled by the backward switching operation by the traveling lever 14. 14 and the operating side arm 82 are connected, and the planting clutch 66 is disconnected by the reverse switching operation by the traveling lever 14.

  When the traveling lever 14 is operated to disconnect the planting clutch 66, the above-described planting operation lever 13 connected to the planting clutch 66 is also pivoted via the link mechanism 81 as the traveling lever 14 swings. On the other hand, when the planting clutch 66 is intermittently operated by the planting operation lever 13, the swinging operation of the operating arm 82 and the like is permitted by the wire 86 and the like, and the traveling lever 14 is not rocked.

Next, the cutting operation range W will be described in detail with reference to FIG.
When the forward rotation power is transmitted, the vertical feed arm 27 is pivoted to the ascending side (counterclockwise in FIG. 4) on the rear vertical feed levers 33L and 33R side. vertical feed lever 33L waiting posture inclined downward, the position of the longitudinal feed arm 27 abuts from the lower side 33R are made longitudinal feed lever 33L, the push-up start position P ₁ to start lifting the 33R, rear vertical feed lever 33L of the working attitude inclined obliquely upward, the position of the longitudinal feed arm 27 begins spaced a vertical feed lever 33L, will push-up completion position P ₂ completes the upheaval 33R from 33R.

Then, during forward driving, position where the posture inclined in advance of the forward obliquely downward from the push-up start position P ₁ of the longitudinal feed arm 27 (pre-position) from P _3, the push-up start position P ₁ → lifting completed The cutting operation range W is a range that passes through the position P ₂ and reaches a position (post-position) P ₄ that is inclined obliquely upward and forward after the push-up completion position P _{2 of the} vertical feed arm 27. Is set.

  When the disengaging operation of the planting clutch 66 by the linkage mechanism 87 is performed in conjunction with the reverse switching operation by the travel lever 14, the planting clutch 66 is delayed and actuated by the action of the restriction mechanism 78 described above. A case is assumed in which reverse power is transmitted to the vertical feed arm 27 between the cutting operation of the planting clutch 66 and the completion of the cutting operation. When the reverse power is transmitted, the vertical feed arm 27 is moved to the vertical feed levers 33L and 33R. If the vertical feed arm 27 is in contact with the vertical feed levers 33L and 33R in the standby posture from the upper side, the vertical feed levers 33L and 33R swing downward and the vertical feed lever 33L , 33R may be damaged, but if the cutting operation range W is set as described above, such a situation can be efficiently prevented.

Next, a different embodiment from the above-mentioned example is demonstrated about another embodiment of this invention based on FIG.
FIG. 11: is a principal part side view of the planting work machine which shows the other example of the setting of a cutting | disconnection operation | movement range. In the example shown in the drawing, during normal rotation, from the immediately preceding position P ₅ is a position immediately before the lifting end position P ₂ of the longitudinal feed arm 27, longitudinal feed arm 27 passes through the push-up completion position P ₂ range front end side reaches obliquely downward position P ₆ located ahead obliquely downward in the moving track is set as the switching operation range W.

  If the cutting operation range W is set in this way, the planting clutch 66 completes the cutting operation before the vertical feed levers 33L and 33R are pushed up, so that the vertical feed arm 27 is moved from the upper side to the vertical feed levers 33L and 33L. It is possible to efficiently prevent the vertical feed levers 33L and 33R from swinging downward by coming into contact with 33R.

Next, a different embodiment from the above-mentioned example is demonstrated about another embodiment of this invention based on FIG.
FIG. 12 is a side view of the main part of the planting machine showing another example of setting the cutting operation range. In the example shown in the drawing, during normal rotation and longitudinal feed arm 27 passes through the push-up completion position P _2, while the distal end side movement trajectory, from obliquely above the position P ₇ which is moved forward obliquely upward, longitudinal feed arm 27 is vertical feed lever 33L, the range extending in the push-up halfway position P ₈ is in the middle is pushed up to 33R, it is set as the switching operation range W.

If the cutting operation range W is set in this way, the cutting operation of the planting clutch 66 is completed before the vertical feeding levers 33L and 33R are pushed up by the vertical feeding arm 27. It is possible to efficiently prevent the vertical feed levers 33L and 33R from swinging downward by coming into contact with the vertical feed levers 33L and 33R. Further, according to the switching operation range W, longitudinal feed arm 27 is positioned in the vicinity of the push-up completion position P _2, longitudinal feed lever 33L, in a state where 33R is switched to the standby position, the reverse of the vehicle body by the travel lever 14 when performing the changeover, since longitudinal feed arm 27 is driven reversely, the longitudinal feed arm 27 is stopped to complete the switching operation of the planting clutch 66 the moment that led to the push-up halfway position P _8, the Even in such a case, it is possible to efficiently prevent the vertical feed arm 27 from coming into contact with the vertical feed levers 33L and 33R in the standby posture from above and swinging the vertical feed levers 33L and 33R downward.

Next, a different embodiment from the above example will be described with reference to FIG.
FIG. 13: is a principal part back sectional view which shows the internal structure of a transmission case regarding another embodiment of this invention. In the example shown in the figure, a large-diameter high-speed input gear (input gear) 88A, a medium-diameter medium-speed input gear (input gear) 88B, and a small-diameter low-speed input are disposed in the transmission case 22 of the planting transmission shaft 41. While the gear (input gear) 88C is rotatably supported, an intermediate shaft 89 that is rotatably supported around the shaft in the transmission case 22 and is substantially parallel to the planting transmission shaft 44 is provided with a high-speed input gear 88A. A small diameter high-speed output gear (output gear) 91A that is always meshed, a large diameter that is always meshed with a medium-speed medium-speed output gear (output gear) 91B and a low-speed input gear (output gear) 88C that are always meshed with the medium-speed input gear 88B. The low-speed output gear 91 </ b> C is attached so as to rotate integrally with the intermediate shaft 89, and the low-speed output gear 91 </ b> C always meshes with the drive gear 92 in the transmission case 22 that rotates integrally with the lateral feed shaft 23.

  A key groove 93 is recessed in the axial direction on the planting transmission shaft 41, and a speed change key 94 is slidably supported in the key groove 93. By the sliding movement, the speed change key 94 causes the high speed input gear 88A and the planting transmission shaft 41 to engage with each other so that the high speed input gear 88A rotates integrally with the planting transmission shaft 41. The medium speed input gear 88B is engaged with the planting transmission shaft 41 so that the medium speed input gear 88B rotates integrally with the planting transmission shaft 41, and the medium speed power is transmitted to the lateral feed shaft 23. The low speed input gear 88C and the planting transmission shaft 41 are engaged so that the low speed input gear 88C rotates integrally with the planting transmission shaft 41, and the low speed power is transmitted to the lateral feed shaft 23. The low-speed state is selectively switched. Incidentally, the sliding movement of the speed change key 94 in the key groove 93 is performed by a sliding operation in the axial direction of the left and right speed change rod 97 connected to the speed change key 94 via the connecting member 96.

  In the configuration in which the power transmitted to the lateral feed shaft 23 is shifted by the shift key 94 as described above, the key groove 93 is provided only at one place on the peripheral surface of the planting transmission shaft 41. The two input gears 88A, 88B, 88C have the same phase, and the rotational position (phase) of the planting transmission shaft 41 is not shifted. In addition to this, when changing the input gears 88A, 88B, 88C that are rotated together with the planting transmission shaft 41 by the sliding movement of the speed change key 94, the seedling placing base 17 is positioned so as to be positioned at the left and right stroke ends. The passenger rice transplanter is configured.

  In addition, the speed ratio of the power transmitted to the lateral feed shaft 23 is set according to the above-described example for each of the high speed state, the medium speed state, and the low speed state, and the phase of the lateral feed shaft 23 changes over time. It is also prevented from slipping along with it.

DESCRIPTION OF SYMBOLS 3 Traveling machine body 6 Planting work machine 17 Seedling stand 18 Planting nail 19 Horizontal feed mechanism 21 Vertical feed mechanism 27 Vertical feed arm 33L, 33R Vertical feed lever 58 Branch mechanism
66 Planting clutch 73 Switching body (rotating body)
78 Regulation mechanism (regulation means)
L Cutting range

Claims (2)

A planting work machine (6) connected to the traveling machine body (3) is supported below the seedling stage (17) and the seedling stage (17) so that the posture can be changed. 17) A planting claw (18) for scraping the seedlings above and planting them in the field, a lateral feed mechanism (19) for sliding the seedling platform (17) to the left and right with respect to the planting nails (18), and seedlings A longitudinal feed mechanism (21) for feeding the seedling placed on the platform (17) downward, and a longitudinal feed lever (33L), (33R) for longitudinally feeding the longitudinal feed mechanism (21) by swinging upward; ) Is provided on the side of the vertical feed mechanism (21), and a vertical feed arm (27) that operates to rotate up and down is provided on the side of the horizontal feed mechanism (19), which rotates at the left and right slide ends of the seedling platform (17). The vertical feed lever (33L), (33R) with the vertical feed arm (27) in the standby position The vertical feed levers (33L), (33R) and the vertical feed arm (27) are arranged and configured so that the vertical feed levers (33L), (33R) are pushed up and swung upward by abutting from the lower side to A branching mechanism (58) for branching the power of the traveling system to the planting work machine (6) side is provided, and the planting claw (18) is driven to change its posture and laterally fed by the power branched by the branching mechanism (58). In the transplanter that drives the seedling platform (17) to slide left and right and the vertical feed arm (27) to rotate up and down via the mechanism (19), the power of the branch mechanism (58) and the planting machine (6) A planting clutch (66) that intermittently powers the planting work machine (6) is provided in the middle of the transmission path, and the rotating body (73) that constitutes the planting clutch (66) has a predetermined phase range. If it is located outside the cutting range (L), A regulating means (78) for stopping the planting claw (18) in a predetermined posture by regulating the cutting operation of the clutch (66) is provided, and the reverse feed power is transmitted to the branch mechanism (58), thereby causing the longitudinal feed arm ( 27) When setting the cutting range (L) to prevent the vertical feed levers (33L) and (33R) from coming into contact with the vertical feed levers (33L) and (33R) from above and swinging the vertical feed levers (33L) and (33R) downward. The rotation position of the rotating body (73) from the push-up completion position (P2) to the time when the vertical feed arm (27) and the vertical feed levers (33L), (33R) are separated from each other is defined as the cutting range (L ) Transplanter located inside.
A planting work machine (6) connected to the traveling machine body (3) is supported below the seedling stage (17) and the seedling stage (17) so that the posture can be changed. 17) A planting claw (18) for scraping the seedlings above and planting them in the field, a lateral feed mechanism (19) for sliding the seedling platform (17) to the left and right with respect to the planting nails (18), and seedlings A longitudinal feed mechanism (21) for feeding the seedling placed on the platform (17) downward, and a longitudinal feed lever (33L), (33R) for longitudinally feeding the longitudinal feed mechanism (21) by swinging upward; ) Is provided on the side of the vertical feed mechanism (21), and a vertical feed arm (27) that operates to rotate up and down is provided on the side of the horizontal feed mechanism (19), which rotates at the left and right slide ends of the seedling platform (17). The vertical feed lever (33L), (33R) with the vertical feed arm (27) in the standby position The vertical feed levers (33L), (33R) and the vertical feed arm (27) are arranged and configured so that the vertical feed levers (33L), (33R) are pushed up and swung upward by abutting from the lower side to A branching mechanism (58) for branching the power of the traveling system to the planting work machine (6) side is provided, and the planting claw (18) is driven to change its posture and laterally fed by the power branched by the branching mechanism (58). In the transplanter that drives the seedling platform (17) to slide left and right and the vertical feed arm (27) to rotate up and down via the mechanism (19), the power of the branch mechanism (58) and the planting machine (6) A planting clutch (66) that intermittently powers the planting work machine (6) is provided in the middle of the transmission path, and the rotating body (73) that constitutes the planting clutch (66) has a predetermined phase range. If it is located outside the cutting range (L), A regulating means (78) for stopping the planting claw (18) in a predetermined posture by regulating the cutting operation of the clutch (66) is provided, and the reverse feed power is transmitted to the branch mechanism (58), thereby causing the longitudinal feed arm ( 27) When setting the cutting range (L) to prevent the vertical feed levers (33L) and (33R) from coming into contact with the vertical feed levers (33L) and (33R) from above and swinging the vertical feed levers (33L) and (33R) downward. When the vertical feed arm (27) is rotated from the push start position (P ₁ ) of the vertical feed levers (33L) and (33R ) to the push complete position (P ₂ ), the rotating body (73) A transplanter in which the cutting range (L) is set so that the rotation rotates from the cutting range (L) to a position other than the cutting range (L) .

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