JP2013153662A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that a seedling transplanter is necessary to horizontally move the position of a planting transmission portion on a transmission frame and to largely change the shape or structure of the planting transmission portion or the like, when changing planting space of right and left seedlings, while a pair of seedling-planting devices for taking and planting seedlings into a field are usually disposed on both right and left sides of the planting transmission portion.SOLUTION: In a seedling transplanter, five planting transmission portions (201) are disposed. Seedling-planting devices (47) are arranged on both right and left sides of the first, third and fifth planting transmission portions (201a, 201c, 201e) from the left side in back surface view, and the seedling-planting devices (47) are arranged on either of the right or left sides of the second and fourth planting transmission portions (201b).

Description

  The present invention relates to a seedling transplanter for transplanting seedlings such as paddy rice in a field.

  In the seedling planting part located behind the seedling transplanter, the seedling planting device that extracts seedlings from the mat seedlings and plantes them in the field is arranged according to the planting interval between the left and right seedlings. It is set as the structure provided as a pair on both sides (patent document 1). When changing the left and right planting intervals of the seedlings with the above configuration, for example, when changing the left and right planting intervals of the center two of the seedling transplanter for 4 or 8 seedlings, There is a problem that it is necessary to move the position to the left and right, and that the shape and structure of the planting transmission section including the transmission frame must be changed significantly.

  In addition, it is not easy to access the internal members from the mounting holes of the planting transmission part, and it is necessary to remove the peripheral members at the time of maintenance and repair, and there is a problem that the maintainability and workability of the repair work are lowered. It was.

  In addition, when the lateral feed speed switching mechanism that changes the lateral feed speed of the seedling platform is damaged due to overload, etc., the lateral feed speed is switched along with replacement of the mechanism. It was necessary to replace the transmission case that contained the mechanism, and there was a problem that labor, time, and cost required for repair work increased.

JP 2011-244767 A

An object is to provide a seedling transplanting machine having a seedling planting part capable of changing the planting interval between the left and right seedlings by a simple method such as replacement of a member such as a spacer. It is another object of the present invention to provide a seedling transplanting machine having a planting transmission portion that ensures improvement in workability in terms of structural replacement. In addition, by suppressing the number of parts, it is to provide a seedling transplanter that reduces the cost and reduces the weight.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention described in claim 1 is a seedling transplanting machine having a seedling planting part (4) behind the traveling vehicle body (2), and the seedling planting part (4) has a transmission case serving as a frame. (43), a plurality of planting transmission parts (201) attached to the transmission case (43) and transmitting power to the seedling planting device (47), and the seedling planting device (47). An eight-row seedling platform (46) for placing mat seedlings and a lateral feed device (55) for driving these seedling platforms (46) in the left-right direction are provided. In the transmission case (43), a seedling platform is provided. A transverse feed speed switching mechanism (97) for changing the transverse feed speed of the table (46) and a branch transmission mechanism (202) for dividing the driving force to the seedling planting device (47); At the tip of the transmission part (201), it has a planting drive shaft (79) for driving the seedling planting device (47). The five planting transmission parts (201) are provided, and the first planting transmission part (201a), the third planting transmission part (201c), and the fifth planting transmission part (201e) are provided from the left side. The seedling planting device (47) is arranged on both the left and right sides, and the seedling planting device is arranged on either the left or right side of the second planting transmission part (201b) and the fourth planting transmission part (201d). It is a seedling transplanting machine characterized by arranging the attaching device (47).

  In the invention according to claim 2, the five planting transmission parts (201) are arranged symmetrically about the vehicle body center line (C1) along the traveling direction in a plan view, and are arranged in the center. An interval (L1) between the planting transmission part (201c) located adjacent to the planting transmission part (201b, 201d) is arranged between the planting transmission part (201a, 201e) located at both ends and the center planting. It is wider than the space | interval (L2) with the planting transmission part (201b, 201d) adjacent to a transmission part (201c), It is a seedling transplanter of Claim 1 characterized by the above-mentioned.

  The invention according to claim 3 is characterized in that the partial clutch (26) for switching on and off of the power from the branch transmission mechanism (202) to the planting transmission part (201) is provided at the first and fifth planting at both ends. It is provided only in a transmission part (201a, 201e), It is a seedling transplanter of Claim 1 or Claim 2 characterized by the above-mentioned.

  According to a fourth aspect of the present invention, there are provided mounting holes (203, 204) that contain bearings of the planting drive shaft (79) on both side surfaces of the planting transmission part (201), respectively, on the left and right sides. The provided first mounting hole (203) has a larger diameter than the second mounting hole (204) provided on the left and right other sides, and a plurality of the first mounting holes (203) are provided along the outer periphery of the second mounting hole (204). An arc-shaped working hole (205) is formed in the seedling transplanter according to any one of claims 1 to 3.

  According to a fifth aspect of the present invention, a housing (206) is disposed between the lateral feed device (55) and the transmission case (43), and the lateral feed speed switching mechanism (97) is disposed in the housing (206). The seedling transplanter according to any one of claims 1 to 4, wherein the seedling transplanter is equipped.

  According to a sixth aspect of the present invention, the traveling vehicle body (2) is provided with a front wheel (5) and a rear wheel (6), and the left rear wheel (6a) is placed on a traveling locus of the left front wheel (5a). And the second planting transmission part (201b) and the right rear wheel (6b) and the fourth planting transmission part (201d) on the traveling locus of the right front wheel (5b). The seedling transplanter according to any one of claims 1 to 5, wherein

According to the invention described in claim 1, the seedling planting part (4) provided with the seedling mounting stand (46) for eight strips is provided at the rear of the seedling transplanting machine, and the seedling planting part (4) is planted. Five attached transmission parts (201) are provided, and the first, third and fifth planting transmission parts (201a, 201c, 201e) from the left side in rear view are provided with seedling planting devices (47) on both the left and right sides. The position of the planting transmission unit (201) is changed by providing the seedling planting device (47) on either the left or right side of the second and fourth planting transmission units (201b, 201d). Without using a spacer or the like, the position of the seedling planting device (47) can be changed to easily change the right and left planting intervals. This is particularly advantageous when the planting interval is narrower than the conventional 30 cm interval, for example, 25 cm. Also, the planting transmission portion (201) is positioned above the float, and the upward rotation of the float is restricted. Since the member to do becomes unnecessary, the number of parts can be reduced.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the five planting transmission parts (201) are symmetrical with respect to the vehicle body center line (C1) along the traveling direction in plan view. The planted transmission is arranged symmetrically as the axis, and the spacing (L1) between the planted transmission part (201c) located in the center and the planted transmission parts (201b, 201d) adjacent thereto is located at both ends. The planting transmission part (201a, 201e) and the planting transmission part (201b, 201d) adjacent to the central planting transmission part (201c) are wider than the distance (L2). 201) is arranged close to the left and right ends of the aircraft to stabilize the left-right balance of the aircraft and prevent the seedling planting part (4) from being biased to the left and right to improve seedling planting accuracy. it can.

According to invention of Claim 3, in addition to the effect of invention of Claim 1 or 2, the partial clutch which switches on / off of the motive power from the said branch transmission mechanism (202) to the planting transmission part (201) ( 26) is provided only in the first and fifth planting transmission parts (201a, 201e) at both ends, so that the partial clutches (26) other than the planting transmission parts (201a, 201e) at both ends that are frequently used are used. ) Can be omitted and the number of parts can be reduced, so that the overall weight can be reduced.
In addition, since the partial clutch (26) is arranged at both ends of the planting transmission portion (201), the maintenance work of the partial clutch (26) and the replacement work in the event of breakage are facilitated. It is shortened and the maintainability is improved.

According to invention of Claim 4, in addition to the effect of the invention of any one of Claims 1 to 3, the planting drive shaft (79) on both side surfaces of the planting transmission part (201). The mounting holes (203, 204) that contain the bearings are provided, and the first mounting holes (203) provided on the left and right sides are larger in diameter than the second mounting holes (204) provided on the left and right sides. As a result, when replacing the member inside the planting transmission portion (201), it is possible to replace it from the larger first mounting hole (203), and the maintainability is improved.
Further, by forming a plurality of arc-shaped work holes (205) along the outer periphery of the second mounting hole (204), it is possible to access a small member in the planting transmission portion from the work holes (205). And maintainability is improved.

According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, a housing (206) is provided between the transverse feed device (55) and the transmission case (43). ) And the lateral feed speed switching mechanism (97) is provided in the housing (206), so that when the lateral feed speed switching mechanism (97) is damaged due to overload or the like, the transmission of the frame There is no need to replace the case (43) and the entire transmission system therein, and only the gear mechanism and the housing (206) can be replaced, improving the maintainability.
Moreover, since the thickness of the housing (206) can be increased, the strength of the entire transmission case (43) can be improved.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, on the traveling locus of the left front wheel (5a), the left rear wheel (6a) and the first wheel By arranging the second planting transmission part (201b) and arranging the right rear wheel (6b) and the fourth planting transmission part (201d) on the traveling locus of the right front wheel (5b), The planting device (47) can be arranged at a position different from the traveling locus of the front wheels (5) and the rear wheels (6), can prevent the planting depth of the seedlings from changing, and improve the planting accuracy of the seedlings. Can do.

It is a side view of the conventional seedling transplanter. It is a top view of the seedling transplanting machine of FIG. It is the top view which showed the planting transmission part of the seedling transplanter of 1st embodiment concerning this invention, the seedling planting apparatus, and the structure position of a rear wheel. It is the top view which showed the planting transmission part of the seedling transplanting machine of FIG. 1, the seedling planting apparatus, and the structure position of a rear wheel. It is a top view which shows the principal part of the seedling planting part of the seedling transplanting machine of FIG. It is a back surface perspective view which shows the transverse feed apparatus of the seedling transplanter of FIG. It is a sectional side view which shows the transverse feed apparatus of the seedling transplanter of FIG. It is a side view which shows the movement state of the seedling mounting stand of the seedling transplanter of FIG. It is a plane sectional view showing a part of transmission case of the seedling transplanter of FIG. It is a plane sectional view showing the planting transmission part and seedling planting device of the seedling transplanting machine of FIG. It is an expanded view of the planting transmission part of the seedling transplanting machine of FIG. It is plane sectional drawing which shows a part of transmission case of the seedling transplanter of 2nd embodiment concerning this invention.

Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings. In this case, in the plan view, it is referred to as right and left from the aircraft in the forward direction, the side view of the aircraft from the left and right direction, the side view from the rear of the aircraft, the rear view, the aircraft from above the aircraft Viewing the upper surface is referred to as a plan view. Details of each part will be specifically described below.

FIG.1 and FIG.2 shows the conventional rice planting machine 1 of the 8 row planting type. The riding-type rice transplanter 1 has a seedling planting portion 4 mounted on the rear side of the traveling vehicle body 2 via a lifting link device 3 so as to be lifted and lowered. The traveling vehicle body 2 is a four-wheel drive vehicle including left and right front wheels 5 (left front wheel 5a, right front wheel 5b) and left and right rear wheels 6 (left rear wheel 6a, right rear wheel 6b) as drive wheels, A transmission case 7 is arranged at the front of the machine body, a front wheel final case 8 is provided on the left and right sides of the transmission case 7, and a front wheel axle projecting outward from a turnable front wheel support 8a of the front wheel final case 8 is provided. The front wheel 5 is attached to. Further, the front end portion of the main frame 9 is fixed to the rear portion of the transmission case 7, and a rear wheel gear case 10 is mounted on a rear wheel rolling shaft provided horizontally at the front and rear of the rear end of the main frame 9. The rear wheel 6 is attached to a rear wheel axle that is supported so as to be able to roll right and left and projects outward from the rear wheel gear case 10. Accordingly, the left and right rear wheels 6a and 6b move up and down relative to the left and right front wheels 5a and 5b by rolling left and right. The left and right front wheels 5a and 5b are set to toe-in.

An engine 11 serving as a prime mover is mounted on a main frame 9, and a hydraulic forward / reverse continuously variable transmission (HST) serving as a transmission device in which the rotational power of the engine 11 can be switched between forward and reverse via a belt transmission device. 12 is input. The output shaft of the forward / reverse continuously variable transmission (HST) 12 is inserted into the mission case 7 and is transmitted from the forward / reverse continuously variable transmission (HST) 12 into the mission case 7. The rotational power transmitted into the mission case 7 is branched and transmitted to the traveling transmission path and the planting transmission path at the transmission branch in the transmission case 7, and separated into the traveling power and the external extraction power. It is taken out. A part of the traveling power is transmitted to the front wheel final case 8 to drive the front wheel 5, and the rest is transmitted to the rear wheel gear case 10 to drive the rear wheel 6. Further, the external take-out power is transmitted to the planting clutch case 14 provided at the rear part of the traveling vehicle body 2 through the take-out transmission shaft 13, and then the seedling planting unit 4, specifically the transmission case 43, by the planting transmission shaft 15. It is transmitted to the input shaft 48. In the planting clutch case 14, a planting clutch for turning on and off the transmission to the seedling planting unit 4 is provided.

The engine 11 is covered with a mid cover 16 disposed substantially at the center of the traveling vehicle body 2, and a seat 17 is provided above the mid cover 16. A front cover 18 is provided in front of the seat 17, and a handle 19 for steering the front wheel 5 is provided above the front cover 18. The left and right sides of the lower end of the mid cover 16 and the front cover 18 are horizontal floor steps 20. A rear step 21 is provided on the rear side of the floor step 20, and a handrail 22 is provided on the rear upper side of the rear step 21. A forward / reverse transmission lever 23 for operating the forward / reverse continuously variable transmission (HST) 12 is provided on the right side of the handle 19.

  Further, on the right side of the seat 17 of the conventional eight-row seedling transplanter, the raising / lowering operation of the seedling planting unit 4 and the operation of the seedling planting unit 4 are performed in order from the side closer to the seat 17 (left side). A planting up / down operation lever 24 that can be turned on and off, a lowering control lever 25 that controls lowering of the seedling planting unit 4, and a plurality (two) of partial clutch levers 27 that operate each of the partial clutches 26 are arranged. . The planting lifting / lowering operation lever 25 is used to operate the planting clutch and also operate the lifting / lowering hydraulic valve to raise and lower the seedling planting unit 4. Further, the lowering control lever 25 operates the lowering control hydraulic valve to control the lowering of the seedling planting portion 4 regardless of the operation of the lifting hydraulic valve, that is, the operation of the planting lifting operation lever 24. Yes.

  Similarly, on the left side of the seat 17, the sensitivity adjustment lever 28 for setting the control sensitivity of the lifting control of the seedling planting unit 4 and the respective partial clutches 26 are operated in order from the side closer to the seat 17 (right side). A plurality (two) of partial clutch levers 27 are arranged. By the sensitivity adjustment lever 28, the vertical movement detection mechanism 29 is moved up and down to change the control target of the forward / backward inclination angle of the center float 30 described later, and the control sensitivity of the raising / lowering control of the seedling planting unit 4 is changed. ing. The control sensitivity becomes sensitive if the front / rear tilt angle control target of the center float 30 is changed to the front lower side, and the control sensitivity is changed if the front / rear tilt angle control target of the center float 30 is changed to the front upper side. This is a well-known method for changing the control sensitivity.

  In the conventional eight-row seedling transplanter, a plurality of partial clutch levers 27 arranged on the left and right sides of the seat 17 are planted in the first and second rows from the left. The partial clutch 26 that turns on and off is operated, the second partial clutch lever 27 from the left operates the partial clutch 26 that turns on and off the third and fourth planting operations from the left, and the third part from the left The clutch lever 27 operates the partial clutch 26 that turns on and off the fifth and sixth planting operations from the left, and the fourth partial clutch lever 27 from the left turns on and off the seventh and eighth planting operations from the left. The partial clutch 26 is operated.

  The planting lifting / lowering operation lever 25 and the sensitivity adjustment lever 28 are arranged at positions that are substantially the same distance from the seat 17, and the levers arranged on the left and right sides of the seat 17 are arranged at the same intervals. Accordingly, the plurality of partial clutch levers 27 provided on the left side of the seat 17 are disposed at positions closer to the seat 17 by one pitch of the lever arrangement than the plurality of partial clutch levers 27 provided on the right side of the seat 17. The length of each lever is set to be the longest for the planting elevating operation lever 24, and then the length of the sensitivity adjusting lever 28, the lowering restricting lever 25, and the partial clutch lever 27 are set shorter gradually.

  In addition, on the left and right sides of the front part of the traveling vehicle body 2, there are provided spare seedling platforms 31 on which supplementary seedlings are placed. Each of the left and right spare seedling platforms 31 is composed of four stages in the vertical direction, and includes a connecting frame 32 that connects the left and right uppermost preliminary seedling platforms 31 to constitute a frontal portal type preliminary seedling platform frame 33. ing. The left and right lower ends of the preliminary seedling stage frame 33 are supported by the mission case 7 and the left and right front wheel final cases 8 respectively.

  A brake pedal 34 is provided on the right side in front of the seat 17. The brake device in the transmission case 7 is operated by the brake pedal 34 to brake the left and right rear wheels 6.

The structure for the vertical movement of the seedling planting unit 4 will be described. The lifting / lowering link device 3 includes one upper link 35 and a pair of left and right lower links 36. The link composed of the upper link 35 and the lower link 36 is pivotally attached to a link base frame 37 having a rear-view portal shape whose base side is erected at the rear end of the main frame 9, and a vertical link 38 on the front end side. Are connected. And the rolling connection shaft which supports the seedling planting part 4 rotatably is inserted in the lower end part of the vertical link 38, and is connected. Therefore, the seedling planting portion 4 is connected to the left and right so as to be freely rollable around the rolling connecting shaft. An elevating actuator 40 that is an elevating hydraulic cylinder is provided between a support member fixed to the main frame 9 and the tip of a swing arm 39 formed integrally with the left and right lower links 36. By elongating and contracting with hydraulic pressure, the elevating link device 3 rotates up and down, and the seedling planting portion 4 moves up and down while maintaining a substantially constant posture. A swing spring is interposed between the lifting actuator 40 and the swing arm 39, and the swing spring attenuates the vibration caused by the raising and lowering of the seedling planting part 4 during normal planting and the like. Hunting is prevented.

  Further, a rolling actuator, which is a rolling motor for rolling the seedling planting part 4 left and right, is provided above the vertical link 38. And between the rolling arm 41 swinging right and left by the rolling actuator and the seedling support frame 42 is connected via left and right rolling springs. Then, when the left / right tilt sensor detects that the seedling planting part 4 has largely rolled left and right around the rolling connecting shaft, the rolling actuator is operated to control the seedling planting part 4 to a desired left / right tilted posture. In addition, as a right-and-left inclination sensor, the sensor which detects the angle difference of the traveling vehicle body 2 and the seedling planting part 4, the sensor which detects the inclination angle with respect to the absolute horizontal of the seedling planting part 4, and the seedling planting part 4 are right and left. A limit switch type sensor or the like that detects the rolling to the maximum within the rolling range can be adopted.

  The transmission case 43 and the several planting transmission parts 201 which comprise the seedling planting part 4, the seedling mounting base 46, and its transverse feed apparatus 55 are demonstrated.

  The transmission case 43 constitutes the frame of the seedling planting unit 4, is configured by coupling a plurality of members, and includes a plurality of planting transmission units 201 that transmit power to the seedling planting device 47. In the inside thereof, at the tip of the planting transmission unit 201, a lateral feed rate switching mechanism 97 that changes the lateral feed rate of the seedling mounting table 46, a branch transmission mechanism 202 that divides the driving force to the seedling planting device 47, and And a planting drive shaft 79 for driving the seedling planting device 47.

  The conventional configuration of the transmission case 43 is shown in FIGS. 1, 2, and 4 to 8. The transmission case 43 is configured by projecting the above-mentioned lateral feed transmission portion 43a upward from a drive base portion 43b that is long in the left-right direction, and a plurality of (four) plantings from appropriate positions in the left-right direction of the drive base portion 43b. The transmission part 201 is configured to protrude rearward.

  The branch transmission mechanism 202 in the transmission case 43 is constituted by a pair of bevel gears, and the power is transferred from the front / rear direction input shaft 48 that is deviated to the left and right sides (right side) of the lateral feed transmission portion 43a via the branch transmission mechanism. To the drive shaft 71 in the left-right direction in the drive base 43b. The drive shaft 71 is provided with a partial clutch 26 for connecting and disconnecting power to each planting transmission portion 201.

The partial clutch 26 in the transmission case 43 will be described in detail with reference to FIG.
The partial clutch 26 includes a partial clutch drive side clutch body 71b and a partial clutch driven side clutch body 72, and the drive clutch pawl 71a of the partial clutch drive side clutch body 71b and the driven clutch pawl 72a of the partial clutch driven side clutch body 72 mesh with each other. Is transmitted. The partial clutch drive side clutch body 71 b rotates integrally with the drive shaft 71 by the partial clutch key 73 and does not move in the direction of the drive shaft 71. The partial clutch driven side clutch body 72 receives a pressing force toward the partial clutch drive side clutch body 71b side by a partial clutch spring 74 which is a compression spring, and an operation cam surface 72b into which the partial clutch pin 75 is inserted has an outer peripheral surface. I have. A partial clutch pin spring 76 that is a compression spring that is pressed against the partial clutch driven side clutch body 72 so that the partial clutch pin 75 is moved out and out at a position facing the partial clutch driven side clutch body 72, and the partial clutch pin spring 76. Therefore, a partial clutch operation cable 77 is provided to pull against the side opposite to the partial clutch driven side clutch body 72. Accordingly, when the partial clutch operation cable 77 is pulled by operating the partial clutch lever 27, the partial clutch pin 75 is separated from the partial clutch driven side clutch body 72, and the partial clutch 26 is brought into the transmission state by pressing the partial clutch pin spring 76. Become. On the contrary, when the partial clutch operation cable 77 is loosened, the partial clutch pin 75 comes into contact with the outer peripheral surface of the partial clutch driven side clutch body 72 and is guided to the operation cam surface 72b as the partial clutch driven side clutch body 72 rotates. The partial clutch driven clutch body 72 moves away from the partial clutch drive side clutch body 71b, and the transmission of the partial clutch 26 is cut off at a predetermined phase where the engagement of the drive clutch pawl 71a and the driven clutch pawl 72a is disengaged. Therefore, the partial clutch 26 is a fixed position stop clutch that cuts off transmission at a predetermined rotational position.

  The configuration of the planting transmission unit 201 attached to the transmission case 43 and the planting drive shaft 79 provided at the tip of the planting transmission unit 201 in the transmission case 43 will be described in detail with reference to FIGS.

  The planting drive shaft 79 for driving the seedling planting device 47 is provided with a driven sprocket 80, and a transmission chain 81 is provided between the driven sprocket 80 and a drive sprocket 78 provided integrally with the partial clutch driven side clutch body 72. Is wrapped around. The transmission chain 81 is provided in the planting transmission unit 201 in the front-rear direction. On the planting drive shaft 79 as a transmission shaft, a safety clutch 82 is provided that cuts off the transmission when the driving load of the seedling planting device 47 exceeds a predetermined value. The safety clutch 82 includes a drive side clutch body 83, A driven clutch body 84 that is transmitted from the drive side clutch body 83 is provided. A driven sprocket 80 serving as a transmission member is provided on the outer periphery of the driving side clutch body 83, and the driving side clutch body 83 rotates integrally with the driven sprocket 80. The driven clutch body 84 rotates integrally with the planting drive shaft 79 via the safety clutch key 85 and does not move in the direction of the planting drive shaft 79. The driven clutch body 84 is pressed against the driven clutch body 84 by a safety clutch spring 86 that is a compression spring provided inside. The drive clutch pawl 83a provided on the drive side clutch body 83 and the driven clutch pawl 84a provided on the driven side clutch body 84 are engaged to transmit power. The contact surface of the drive clutch pawl 83a and the driven clutch pawl 84a is an inclined surface. When the driving load of the planting drive shaft 79 increases, the drive clutch body 83 resists the safety clutch spring 86 by the inclined surface. As a result, the safety clutch 82 is disconnected from the driven clutch pawl 84a. Therefore, the drive shaft 71 is transmitted to the seedling planting device 47 via the partial clutch 26, the drive sprocket 78, the transmission chain 81, the driven sprocket 80, the safety clutch 82 and the planting drive shaft 79.

  The safety clutch spring 86 is disposed between the planting drive shaft 79 and the driven sprocket 80, and is disposed at the same position (left and right position) as the driven sprocket 80 in the planting drive shaft 79 direction (left and right direction). The right side of the planting drive shaft 79 is directly supported by a right bearing (ball bearing) 87 provided in the planting transmission unit 201, and the outer periphery of the driven side clutch body 84 becomes the bearing unit provided in the planting transmission unit 43a. Bearing (ball bearing) 88, and the outer peripheral surface of the planting drive shaft 79 is in contact with the inner peripheral surface of the bearing-side clutch body 84 that is bearing, thereby bearing the left side of the planting drive shaft 79. The left and right widths of the portion of the driven side clutch body 84 excluding the driven clutch pawls 84a are smaller than the left and right widths of the left bearings (ball bearings) 88, so that the drive clutch pawls 83a and the driven clutch pawls 84a Located in the interior space.

  The seedling planting device 47 driven by the planting drive shaft 79 includes a rotating case 89 and a seedling planting tool 47a, and the planet 89 in the rotating case 89 is rotated by the rotation of the rotating case 89 as the planting drive shaft 79 is driven. In this configuration, the seedling planting tool 47a is operated with a predetermined loop trajectory that is long in the vertical direction while changing the forward / backward tilting posture of the seedling planting tool 47a via the gear mechanism 90.

The configuration of the eight seedling mounts 46 will be described in detail with reference to FIGS. 1, 2, 6, and 7.
The mat seedlings are placed on these seedling platforms 46 and moved back and forth to the left and right to supply the seedlings to the seedling outlets 44 of each line. Transfer seedlings downward. The seedling mount 46 is supported on the back side of the seedling mounting surface so as to be movable in the left-right direction along a seedling receiving frame 49 provided in the left-right direction at the lower part on the back side. The seedling mounting table 46 includes a plurality of partition wall portions 46a extending vertically, and is divided by the partition wall portions 46a to form seedling mounting portions 46b for the respective strips. It can be configured. The seedling receiving frame 49 is provided with eight seedling outlets 44 for the number of the seedlings.

  An upper guide member 56 and a lower guide member 57, which are left and right moving guide members that are long in the left-right direction, are provided on the upper and lower sides of the back side of the seedling table 46, respectively. The upper guide member 56 is formed in a cross-sectional shape in which the lower side is cut out in a side view, and is in contact with a rotatable support roller 58 supported from the lower side. A plurality (four) of the support rollers 58 are provided at appropriate positions (four locations) along the upper guide member 56, and are attached to the upper portion of the seedling support frame 42 fixed to the upper side of the transmission case 43. Yes. The lower guide member 57 includes a cut-out cross-sectional shape portion whose lower side is cut out in a side view and a square cross-sectional shape portion immediately above the cut-out cross-sectional shape portion, and a slider 58 is fixed to the cut-out cross-sectional shape portion. A plurality (four) of the sliders 58 are provided at appropriate positions (four places) along the lower guide member 57, and come into contact with the rail portion 49a provided on the upper part of the seedling receiving frame 49 from above. Accordingly, the seedling mount 46 is supported by the support roller 58 and the seedling receiving frame 49 so as to be movable in the left-right direction. Here, the support roller 58 serves as a support member that supports the upper part of the seedling table 46 so as to be movable in the left-right direction, and moves to the upper side of the seedling table 46 (strictly, in an obliquely upward direction along the inclination of the seedling table 46). The seedling stage 46 is supported so as to be movable upward (strictly, obliquely forward and upward along the inclination of the seedling stage 46).

 The seedling feeding belt 45 is wound around a lower driving roller 59 and an upper driven roller 60. The drive roller 59 rotates integrally with the seedling feed drive shaft 61 in the left-right direction. The seedling feeding drive shaft 61 is configured to rotate only in the direction in which the seedling feeding belt 45 feeds the seedling by the ratchet mechanism 62.

  The lateral feed device 55 is a device that drives the seedling mount 46 in the left-right direction, and includes a lateral feed transmission portion 43a, a lead cam shaft 50, a lead cam 51, and the like. As shown in FIGS. 1, 2, and 5 to 8, a lead cam shaft 50 that protrudes from the transmission case 43 (the lateral feed transmission portion 43 a of the transmission case 43) to the left and right sides (right side) is provided. The lead cam 51 is screwed to 50. The lead cam shaft 50 has a lead groove formed on the outer periphery of a portion exposed to the outside from the transmission case 43, and a lead pawl provided on the lead cam 51 is inserted into the lead groove. Is configured to reciprocate left and right.

  A connecting shaft 54 of a connecting member 53 fixed to the seedling mounting base 46 is inserted into the connecting groove 52 provided at the rear part of the lead cam 51, and the connecting member 53 and thus the seedling mounting base 46 are moved to the left and right as the lead cam 51 moves left and right. It is configured to move. The seedling receiving frame 49 serves as a support member that supports the lower part of the seedling mounting table 46 so as to be movable in the left-right direction, and moves to the upper side of the seedling mounting table 46 (strictly, obliquely forward and upward along the inclination of the seedling mounting table 46). The seedling stage 46 is supported so as to be movable upward (strictly, obliquely forward and upward along the inclination of the seedling stage 46). The connecting member 53 is fixed to the position of the fifth seedling mounting portion 46b from the left side which is the left and right side (right side) of the two right and left seedling mounting portions 46b.

  The connecting shaft 54 is a shaft that is fixed to the connecting member 53 and faces in the left-right direction, and is constituted by a bolt. The connection groove 52 is formed by a long hole into which the connection shaft 54 is inserted, and is bent in an L shape in a side view. The connection groove 52 is connected in a normal state where the seedling mount 46 is in contact with the seedling receiving frame 49 with the bent portion as a boundary. The normal groove portion 52a in which the shaft 54 is located and the moving groove portion 52b in which the connecting shaft 54 is located in a state in which the seedling placing table 46 is separated from the seedling receiving frame 49 upward (strictly, in an obliquely forward direction along the inclination of the seedling placing table 46). It has. Therefore, the normal groove portion 52a and the moving groove portion 52b are communicated by intersecting (orthogonal). Usually, the groove 52a extends in the up-down direction with a slight downward inclination when viewed from the side of the body. The moving groove 52b extends in the forward rising inclination direction close to the front / rear inclination direction of the seedling stage 46. Note that the moving groove 52b is oriented in a direction inclined slightly forward so as to be located on the front side as it goes upwards (to move away from the seedling stand 46 as it goes upwards) as compared to the front-back inclination of the seedling stand 46. The connecting shaft 54 penetrates the connecting groove 52, and the connecting member 53 is positioned with almost no gap on the left and right sides of the connecting groove 52.

  A drive side arm 63 that rotates integrally with the lead cam shaft 50 is provided at the end (right end) opposite to the lateral feed transmission portion 43a of the lead cam shaft 50 in the left-right direction. Further, a relay shaft 64 in the left-right direction is provided above the seedling feed drive shaft 61, and left and right driven arms 65 are provided at appropriate positions of the relay shaft 64. The relay shaft 64 and the seedling feed drive shaft 65 are connected in transmission by a link mechanism 69 including a seedling feed drive shaft side arm 66, a relay shaft side arm 67, and a link 68.

The operation of the lateral feed device 55 will be described. When the seedling stage 46 reaches the end of the left-right movement stroke, the driving side arm 63 contacts the driven side arm 65 from below to rotate the relay shaft 64 by a predetermined angle. When the seedling stage 46 reaches the left end of the left-right movement stroke, the driving arm 63 contacts the right driven arm 65 from below to rotate the relay shaft 64 by a predetermined angle, so that the seedling stage 46 When reaching the right end of the left-right movement stroke, the drive side arm 63 comes into contact with the left driven arm 65 from below to rotate the relay shaft 64 by a predetermined angle. That is, two driven arms 65 are provided on the same relay shaft 64 on the left and right with respect to one drive arm 63. Then, the rotation of the relay shaft 64 is transmitted to the seedling feed drive shaft 61 via the link mechanism 69 and the ratchet mechanism 62. Thereby, the seedling feeding belt 45 is operated by a predetermined amount. When the drive side arm 63 is separated from the driven side arm 65, the relay shaft 64 and the driven side arm 65 are returned to the positions before driving by the tension of the spring provided on the relay shaft 64. The relay shaft 64 and the driven arm 65 are configured to return to a position where the stopper provided at the end of the relay shaft 64 contacts the regulating member on the seedling stage 46 main body side due to the tension of the spring.

The seedling feed drive shaft 61 is divided into a left four-line portion and a right four-line portion. The relay shaft 64 is single, and the link mechanism 69 is also provided on the left and right corresponding to the left and right seedling feed drive shafts 61, respectively. Each seedling feed partial clutch 70 provided on the seedling feed drive shaft 61 turns on and off the transmission from the seedling feed drive shaft 86 to the drive roller 84 that rotates integrally every two strips, and the seedling feed belt 79. Is configured to be turned on and off every two lines. The seedling feeding partial clutch 70 is configured to be operated by a corresponding partial clutch lever 27 via a seedling feeding operation cable.

  The relay shaft 64 is provided on the left and right over the positions of the third and fourth seedling mounting portions 46b from the left side of the seedling mounting base 46. The left and right driven arms 65 are provided at the position of the fourth seedling mounting part 46b from the left side and the position of the third seedling mounting part 46b from the left side adjacent thereto. In the above description, the configuration in which the two driven arms 65 are provided on the left and right with respect to the one driving arm 63 has been described. However, one driven arm is provided on the two left and right driving arms. In this case, the driven arm 65 can be provided at the position of the partition wall portion 46a between the third seedling mounting portion 46b and the fourth seedling mounting portion 46b from the left side.

  The seedling support frame 42 is provided with left and right frame portions 42a extending left and right at a substantially central position in the vertical direction. The left and right frames 42a are round shafts having a circular cross section. At right and left proper positions of the left and right frames 42a, suspension members 99 each having a hook 98 at the lower end are attached to the left and right frames 42a so as to be rotatable around the axis.

  Therefore, in the normal planting operation state (normal state) of the seedling table 46, the connection shaft 54 is connected to the lower end portion (front lower end portion) of the normal groove portion 52a of the connection groove 52 of the lead cam 51 due to its own weight. To position. In moving the seedling mounting table 46 to the upper moving state, the operator moves the seedling mounting table 46 upward (rear obliquely upward) while guiding the connecting shaft 54 to the normal groove 52a, and further bending the connecting groove 52. The seedling mount 46 is moved obliquely upward in the forward direction while guiding the connecting shaft 54 to the moving groove 52b of the connecting groove 52 through the portion. The left and right support shafts 100 provided on the back surface side of the seedling mounting portion 46b of the left and right outermost strip portion of the seedling mounting base 46 in a state where the connecting shaft 54 is located at the front end (upper end) of the moving groove 52b. By being hung on the hook 98 of the suspension member 99, the seedling stage 46 is held in a moved state moved upward. The support shaft 100 is disposed at the same position as the relay shaft 64 of the seedling feeding device in a side view. In the moving state, the seedling stage 46 is moved upward from the normal state along the front-back inclination direction of the seedling stage 46, and the front-back inclination angles of the normal state and the seedling stage 46 are substantially the same. Further, since the suspension member 99 is rotatable around the axis of the left and right frames 42a, the work of hanging the support shaft 100 on the hook 98 can be easily performed. The hanging member 99 may be configured not to rotate with respect to the left and right frames 42a.

  A seedling receiving tool is provided for each seedling mounting part 46b of each strip, and the seedling receiving tool receives and regulates that the seedling on the seedling mounting part 46b moves to the seedling outlet 44 side by its own weight. With this seedling catching tool, it is possible to ensure that seedlings are not reliably supplied to the seedling outlet 44 regardless of the operation of the seedling feeding belt 45, and other planting without planting seedlings in some planting strips. Planting of seedlings can be partially performed only with the strip.

The lateral feed speed switching mechanism 97 in the transmission case 43 will be described with reference to FIG.
The lateral feed speed is the lateral feed speed of the seedling table 46. The conventional configuration is as follows. That is, the lateral feed input gear 91 is formed integrally with the partial clutch drive side clutch body 71b of the partial clutch 26 that is transmitted from the left side in the rear view to the third and fourth seedling planting devices 47. The lateral feed transmission gear 92 that meshes with the lateral feed input gear 91 is transmitted to the lateral feed transmission shaft 93 that rotates integrally with the lateral feed transmission gear 92, and the lateral feed transmission drive gear that rotates integrally with the lateral feed transmission shaft 93. 94 meshes with the lateral feed shift driven gear 95, and the lateral feed shift driven gear 95 and the lead cam shaft 50 rotate integrally. A plurality of pairs (two sets) having different transmission ratios are provided for the pair of gears of the lateral feed transmission drive gear 94 and the lateral feed transmission driven gear 95, and a lateral feed transmission drive gear 94 that rotates integrally with the lateral feed transmission shaft 93 by a slide key 96 is provided. By switching, the rotation speed of the lead cam shaft 50 can be switched. The lateral feed speed switching device 97 changes the lateral movement speed of the seedling table 46. Note that the left end portions of the lateral feed transmission gear 92, the lateral feed transmission shaft 93, the lateral feed transmission drive gear 94, the lateral feed transmission driven gear 95, and the lead cam shaft 50 are accommodated in the lateral feed transmission portion 43a.

  FIG. 3 is a plan view illustrating the configuration positions of the planting transmission unit 201 and the planting planting device 47 of the seedling transplanter according to the first embodiment of the present invention, and the front and rear wheels (only the rear wheels are shown in FIGS. 5 and 6). Show. In addition, about the structure of the part which does not mention especially, it is the same as that of the structure of the conventional seedling transplanter. The seedling transplanting machine according to the present embodiment has an eight-row planting configuration in which the spacing between planting strips is 25 cm. Five planting transmission parts 201 attached to the transmission case 43 are provided, and are first to fifth planting transmission parts in order from the left side in a rear view. The first planting transmission unit 201a, the third planting transmission unit 201c, and the fifth planting transmission unit 201e are provided with seedling planting devices 47 on the left and right sides as in the conventional case. The seedling planting device 47 is provided only on the right side when viewed from the rear side in the attached transmission portion 201b, and the seedling planting device 47 is provided only on the left side when viewed from the rear side in the fourth planting transmission portion 201d.

By setting it as the said structure, the position of the seedling planting apparatus 47 can be changed using a spacer, without changing the position of the planting transmission part 201, and the planting space | interval on either side can be changed easily. For example, when changing the left and right planting intervals of the center two of the seedling transplanter for 4 or 8 strips, it is configured to be a 25 cm strip when attached without a spacer, and on the left and right of the planting transmission unit 201 When a 2.5 cm spacer is inserted, the interval is changed to 30 cm. The interval of the other seedling planting apparatus 47 is changed as follows with the 8-row seedling transplanter.
That is, the distance between the third and fourth seedling planting devices 47 from the left, and the distance between the fifth and sixth seedling planting devices 47 are at the joint between the transmission case 43 and the planting transmission parts 201b and 201d. By interposing a 7.5 cm spacer, the interval can be set to 30 cm. The distance between the second and third seedling planting devices 47 from the left and the distance between the sixth and seventh seedling planting devices 47 were provided on both sides of the planting transmission parts 201a and 201e using 15 cm spacers. It can be set to 30 cm by inserting a 2.5 cm spacer between the seedling planting device 47. Moreover, by setting it as the said structure, the space | interval of the 1st and 2nd seedling planting apparatus 47 from the left, and the space | interval of the 7th and 8th seedling planting apparatus 47 can also be 30 cm.

  By providing the planting transmission part 201 having the seedling planting device 47 only on one side like the second planting transmission parts 201b and 201d, the main parts such as the transmission case 43 and the like are shared, and for the sixth and eighth articles Therefore, the seedling transplanting machine for 10 threads can be used, so that seedling transplanting work can be performed in accordance with various working conditions.

  In addition, as shown in FIG. 3, the five planting transmission parts (201) are arranged symmetrically with respect to the vehicle body center line (C1) along the traveling direction in plan view, and are located in the center. An interval (L1) between the attached transmission part (201c) and the adjacent planted transmission part (201b, 201d) is located at both ends of the attached transmission part (201a, 201e) and the central planting transmission part It was set as the structure which becomes wider than the space | interval (L2) with the planting transmission part (201b, 201d) adjacent to (201c). Here, the interval between the planting transmission parts 201 refers to a center line in each planting transmission part along the traveling direction in a plan view (in this embodiment, the center line of the chain responsible for power transmission).

  By setting it as the said structure, the planting transmission part (201) which is a heavy load is arrange | positioned near the right and left both ends of the body, the right-and-left balance of the body is stabilized, and the seedling planting part (4) is biased to the left and right. Therefore, the planting accuracy of the seedling is improved.

Further, as shown in FIG. 3, the traveling locus of the left front wheel 5a and the left rear wheel 6a is made to coincide, and the second planting transmission portion 201b is arranged on the traveling locus. Similarly, the traveling trajectories of the right front wheel 5b and the right rear wheel 6b are made to coincide with each other, and the fourth planting transmission portion 201d is arranged on the traveling locus.
By setting it as the said structure, since the seedling planting apparatus 47 is arrange | positioned in the position different from the driving | running | working locus | trajectory of the front wheel 5 and the rear wheel 6, the recessed part by passage of the front wheel 5 and the rear wheel 6 is a seedling planting location. Therefore, the planting depth of the seedling is prevented from changing, and the planting accuracy of the seedling is improved.

Moreover, it was set as the structure which provided the partial clutch 26 conventionally provided in each planting transmission part 201 only in the 1st and 5th planting transmission parts 201a and 201e of both ends.
By adopting the above configuration, the partial clutch 26 other than the planting transmission portions 201a and 201e at both ends where the partial clutch 26 is frequently operated can be omitted, and the number of parts can be reduced. Can be reduced in weight.
In addition, since the partial clutch 26 is arranged at both ends of the planting transmission portion 201, the number of parts to be removed or assembled is reduced when the partial clutch 26 is serviced or when the damaged partial clutch 26 is replaced. Maintenance work is improved because maintenance work and chill work are easy.
In the above configuration, the partial clutch lever 27 for switching on / off of the partial clutch 26 is provided on each of the left and right sides of the seat 17, and when the left clutch lever 27 is operated, the partial clutch 26 at the left end is operated, and the right clutch When the clutch lever 27 is operated, the partial clutch 26 at the right end is activated.

Moreover, in FIG. 11, the expanded view of the casing components of the planting transmission part 201 of the seedling transplanter concerning this embodiment is shown. (A), (c) is a side view, (b) is sectional drawing seen from the front. The casing is a casting and includes bearings 87 and 88 for rotatably supporting the planting drive shaft 79 in holes 203 and 204 provided on both side surfaces thereof. Here, the mounting holes provided on the left and right side surfaces have different diameters, and the first mounting hole 203 has a larger diameter than the second mounting hole 204 provided on the other side surface. Yes.
By configuring as described above, when the members inside the planting transmission portion 201 are replaced, it is possible to replace them from the larger first mounting hole 203, and the maintainability is improved.
A plurality of arc-shaped work holes 205 are provided along the outer periphery of the second mounting hole 204.
By configuring as described above, it is possible to easily access members in the planting transmission portion from the work hole (205), for example, a C-ring that restrains the left and right movements of the chain, and it is unnecessary to remove and assemble the members. Therefore, the maintenance is improved.

FIG. 12 is a sectional plan view showing a part of the transmission case of the second embodiment according to the present invention. In the present embodiment, a housing 206 is disposed between the lateral feed device 55 and the transmission case 43, and a lateral feed speed switching mechanism 97 is provided in the housing 206. By providing the housing 206 equipped only with the lateral feed speed switching mechanism 97, even if the lateral feed speed switching mechanism 97 is damaged due to overload or the like, the transmission case 43 that is the frame and the entire transmission system inside the frame. There is no need to replace the gear mechanism, and only the gear mechanism and the housing 206 can be replaced.
Moreover, it becomes possible to make the housing 206 thick, and the strength of the entire transmission case 43 can be improved.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 2 Traveling vehicle body 4 Seedling planting part 5 Front wheel 5a Left front wheel 5b Right front wheel 6 Rear wheel 6a Left rear wheel 6b Right rear wheel 26 Partial clutch 43 Transmission case 46 Seedling stand 47 Seedling planting device 55 Lateral feeding device 79 Planting drive shaft 97 Transverse feed speed switching mechanism 201 Planting transmission unit 201a First planting transmission unit 201b Second planting transmission unit 201c Third planting transmission unit 201d Fourth planting transmission unit 201e First Five planting transmission parts 202 Branching transmission mechanism 203 First mounting hole 204 Second mounting hole 205 Working hole 206 Spacer

Claims (6)

A seedling transplanting machine having a seedling planting part (4) behind the traveling vehicle body (2),
In the seedling planting part (4), a transmission case (43) serving as a frame,
A plurality of planting transmission parts (201) attached to the transmission case (43) to transmit power to the seedling planting device (47);
An eight-row seedling stand (46) for placing mat seedlings to be supplied to the seedling planting device (47);
A lateral feed device (55) for driving these seedling platforms (46) in the left-right direction,
In the transmission case (43), a lateral feed speed switching mechanism (97) for changing the lateral feed speed of the seedling platform (46),
A branch transmission mechanism (202) for dividing the driving force to the seedling planting device (47),
At the tip of the planting transmission part (201) having a planting drive shaft (79) for driving the seedling planting device (47),
Five planting transmission parts (201) are provided,
From the left side, the seedling planting device (47) is arranged on the left and right sides of the first planting transmission part (201a), the third planting transmission part (201c), and the fifth planting transmission part (201e). And
A seedling transplanting machine, wherein the seedling planting device (47) is arranged on either the left or right side of the second planting transmission section (201b) and the fourth planting transmission section (201d). The five planting transmission parts (201) are arranged in line symmetry with the vehicle body center line (C1) along the traveling direction in plan view as a symmetry axis,
The distance (L1) between the planting transmission part (201c) located in the center and the planting transmission part (201b, 201d) adjacent thereto is
It is characterized by being wider than the interval (L2) between the planting transmission parts (201a, 201e) located at both ends and the planting transmission parts (201b, 201d) adjacent to the central planting transmission part (201c). The seedling transplanter according to claim 1. A partial clutch (26) for switching on / off of power from the branch transmission mechanism (202) to the planting transmission section (201),
The seedling transplanter according to claim 1 or 2, wherein the seedling transplanter is provided only in the first and fifth planting transmission parts (201a, 201e) at both ends. Mounting holes (203, 204) that contain bearings of the planting drive shaft (79) are provided on both side surfaces of the planting transmission part (201), respectively.
The first mounting holes (203) provided on the left and right sides are
Larger diameter than the second mounting hole (204) provided on the left and right other side,
The seedling transplanter according to any one of claims 1 to 3, wherein a plurality of arc-shaped work holes (205) are formed along an outer periphery of the second mounting hole (204). . A housing (206) is disposed between the lateral feed device (55) and the transmission case (43);
The seedling transplanter according to any one of claims 1 to 4, wherein the lateral feed speed switching mechanism (97) is provided in the housing (206). The traveling vehicle body (2) is provided with a front wheel (5) and a rear wheel (6),
On the traveling locus of the left front wheel (5a), the left rear wheel (6a) and the second planting transmission part (201b) are arranged,
The right rear wheel (6b) and the fourth planting transmission part (201d) are arranged on the travel locus of the right front wheel (5b), according to any one of claims 1 to 5, Seedling transplanter.

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