JP2011004650A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact seedling transplanter having a seedling-planting transmission having excellent maintainability with a suppressed transverse width.SOLUTION: The seedling transplanter includes: a traveling vehicle body 1; an engine E; and a seedling planting part N connected to the vehicle body 1 so as to allow lifting and lowering and rolling to right and left, and having a seedling feeder 6 and a seedling planting device 50. In the seedling transplanter, transverse transmitting parts 11 and 12 from the engine E to the seedling feeder 6 are provided on one side of right and left relatively to a rolling shaft 55; a lead cam shaft 10 is provided on the inside in the right and left directions of the transverse transmitting parts 11 and 12; and a seedling-feeding driving cam 170 is installed at the end on the inside in the right and left directions of the lead cam shaft 10 and on the side of the transverse transmitting parts 11 and 12 relatively to the rolling shaft 55. Thereby, the mounting and demounting etc., of the transverse transmitting parts 11, 12 etc., can easily be carried out from one side of right and left to improve the maintainability. Furthermore, the transverse width of the lead cam shaft 10 can be suppressed without unnecessarily lengthening the lead cam shaft 10 by locating the seedling-feeding driving cam 170 between the transverse transmitting parts 11 and 12 and the rolling shaft 55.

Description

  The present invention relates to a seedling planting transmission device of a seedling transplanting machine, and is a compact configuration of a seedling planting transmission device in a multi-row planting form.

  Conventionally, a seedling platform that supplies a plurality of seedlings on the left and right corresponding to the seedling mounting section corresponding to the seedling mounting section by placing the seedlings on the seedling mounting sections provided on the left and right and moving left and right, Taking seedlings at the exit and planting them Seedling planting units equipped with a plurality of seedling planting devices provided on the left and right, a powder storage unit for storing fertilizer and chemicals that become powder particles, and powder particles in the powder storage unit Known as a multi-row planting type rice transplanter that is a seedling transplanting machine equipped with a powder body discharging device equipped with a feeding part that feeds the body by a predetermined amount and a float that slides on the seedling planting surface It has been.

  In such a multi-row planting type rice transplanter, the transmission device for transmitting to the seedling planting device of each planting row becomes wider in the lateral direction (left and right direction), so that the weight balance between the left and right is maintained. It becomes a difficult form. If the weight is deviated to the left or right, the rolling action of the seedling planting device during the seedling planting process is deviated, making it difficult to level the horizontal plane in the horizontal direction on the right and left seedlings, and the planting depth is uniform. It is difficult to maintain.

  Therefore, in Patent Document 1 below, a seedling transmission case is provided with an input shaft at the front and a horizontal transmission shaft transmitted from the input shaft, and a vertical transmission mechanism from the lateral transmission shaft at the rear. The vertical transmission mechanism is mounted on the right and left sides of the vertical transmission mechanism so that one side of the saddle clutch and the safety clutch is on the horizontal transmission shaft and the other is on the planting shaft. A cam shaft transmission mechanism for driving a cam shaft for lateral movement of the seedling tank from the lateral transmission shaft, and a seedling transplanting machine provided with this cam shaft transmission case, which are arranged on either side, A configuration of the seedling transmission device is disclosed.

  When it is transmitted from the input shaft to the horizontal transmission shaft, it is transmitted to each planting shaft via the vertical transmission mechanism of the seedling planting transmission case by the saddle clutch and safety clutch, and the seedling planting device is driven and seedling planting action Is done. Further, the seedling tank is moved in the lateral direction by transmitting the camshaft from the lateral transmission shaft via the camshaft transmission mechanism. The safety clutch is slipped and stopped when an overload is generated in the operation of the seedling planting device, and the seedling planting device can be secured. In addition, the hook clutch can be turned off when stopping the seedling planting device for some seedlings during the dredging work, and the transmission of the hooked clutch and the interlocking planting shaft is stopped. Is done. While these hook clutch and safety clutch are arranged on one side of the vertical transmission mechanism, the camshaft transmission mechanism and the camshaft transmission case are provided on the opposite side, so that the seedling transmission case central part The right and left weight balance can be achieved.

JP-A-2005-304339

  According to the configuration described in Patent Document 1, in the seedling planting transmission case of the seedling planting device, the hook clutch and the safety clutch are arranged on one side of the vertical transmission mechanism, and the cam shaft transmission mechanism and the cam shaft are arranged on the opposite side. Since the transmission case is arranged, the right and left weight balance in the seedling planting transmission case is achieved, and the weight balance of the seedling planting case and the seedling planting device as a whole is maintained and the rolling operation of the accurate seedling planting device is performed. be able to.

  On the other hand, the camshaft transmission mechanism and the camshaft transmission case are provided from the rolling shaft at the center of the left and right sides of the fuselage, and the camshaft for reciprocating the seedling tank left and right is located below the bottom of the seedling tank. It is provided in the lateral direction (left and right direction) along a wide seedling planting transmission case in the direction. Thus, if the camshaft transmission mechanism, the camshaft, and the like are located at the center of the left and right sides of the machine body, they cannot be easily detached, so that maintenance such as repair is inferior. In addition, if the length of the cam shaft in the left-right direction is long, the seedling transplanting device takes a lateral width (width in the left-right direction), leading to an increase in the size of the seedling transplanter. In recent years, a more compact seedling transplanter has been demanded from the viewpoint of installation space and economy.

  Accordingly, an object of the present invention is to provide a more compact seedling transplanter including a seedling planting transmission device that has excellent maintainability and has a reduced lateral width.

The said subject is achieved by the following structure.
That is, the invention according to claim 1 includes a traveling vehicle body (56) including left and right front wheels (13) and left and right rear wheels (15), and a drive source (E) provided on the traveling vehicle body (56). A rolling shaft (55) which is provided behind the traveling vehicle body (56) and in the center in the left-right direction toward the forward direction of the traveling vehicle body (56) and has a longitudinal direction in the front-rear direction; 56), a seedling mounting portion (6e) which is connected to the rear of the vehicle body (56) so as to be movable up and down and to be able to roll in the left and right directions around the rolling shaft (55). The seedlings on the seedling mounting part (6e) are moved left and right and supplied one by one to the seedling outlets (6b) provided on the left and right so as to correspond to each seedling mounting part (6e). When the seedling is taken out from the seedling outlet (6b), A seedling feeding device (6) that is fed to a seedling removal outlet (6b) by a seedling feeding belt (6c) that is moved in the vertical direction or a vertical direction, and a seedling planting device (50) for planting a seedling taken out from the seedling removal outlet (6b) In a multi-row planting seedling transplanting machine provided with a seedling planting part (N) provided with a displacement to the left and right side toward the forward direction of the traveling vehicle body (56), the drive source ( E) a lateral transmission unit (11, 12) to which power from the transmission is transmitted, and a laterally inner side of the lateral transmission unit (11, 12) in a forward direction of the traveling vehicle body (56), Connected to the lead cam shaft (10) that is driven and rotated by the power from the lateral transmission portions (11, 12), the seedling mounting portion (6e) of the seedling feeding device (6), and the lead cam shaft (10). The traveling vehicle body (56) is rotated by the rotation of the lead cam shaft (10). It is connected to a lead cam (48) that moves left and right toward the advancing direction and moves the seedling on the seedling mounting portion (6e) to the left and right, and a seedling feeding belt (6c) of the seedling feeding device (6), A seedling feed arm (172) for driving the feed belt (6c) and a laterally inner side end portion of the lead cam shaft (10) in the forward direction of the traveling vehicle body (56) with respect to the rolling shaft (55) And a seedling transplanter having a seedling feeding drive cam (170) that is provided on the side of the lateral transmission section (11, 12) and drives the seedling feeding arm (172) at the left and right moving ends of the seedling placement section (6e). .

  In the invention according to claim 2, the input shaft (3) for inputting power from the drive source (E) to the lateral transmission portion (11, 12) is laterally transmitted in the forward direction of the traveling vehicle body (56). Provided on the same left and right side as the portion (11, 12) and on the inner side in the left-right direction with respect to the lateral transmission portion (11, 12) at a position intersecting the lead cam shaft (10) in plan view, The seedling feed drive cam (170) is provided on the inner side in the left-right direction with respect to the input shaft (3) toward the forward direction of (56), and the lateral transmission portions (11, 12) are further extended from the rear wheel (15). The seedling transplanter according to claim 1, which is also provided on the outer side in the left-right direction.

  According to the seedling transplanting machine of the first aspect, the lateral transmission portions (11, 12), the lead cam shaft (10), and the seedling feeding drive cam (170) of the seedling feeding device (6) are arranged on the left and right sides of the vehicle body (56). Since it can be easily installed from the left and right sides of the machine body, these can be easily attached, detached, and repaired from the left and right sides. In addition, since the seedling feed drive cam (170) at the inner end in the left-right direction of the lead cam shaft (10) is located between the lateral transmission portions (11, 12) and the rolling shaft (55), the lead cam shaft (10) The width of the lead cam shaft (10) can be suppressed without unnecessarily increasing the length. Therefore, it becomes a compact and low-cost seedling planting transmission device, and thus the seedling transplanting device can be made compact by the seedling planting transmission device having a reduced lateral width.

According to the seedling transplanting machine of claim 2, in addition to the effect of the invention of claim 1, the input shaft (3) and the lead cam shaft (10) are crossed in a plan view, and the seedling feeding drive cam ( 170) is provided on the inner side in the left-right direction with respect to the input shaft (3), so that the input shaft (3) and the lead cam shaft (10) are configured such that the input shaft (3) and the seedling feed driving cam (170) do not interfere with each other. Can be placed close to each other, and the aircraft can be made compact by making effective use of space.
Further, the lateral transmission portions (11, 12) are arranged on the outer side in the left-right direction with respect to the rear wheels (15), so that they can be attached / detached or repaired from one side of the airframe without interfering with the rear wheels (15). And maintainability is further improved.

It is a side view of the rice transplanter of one embodiment of the present invention. It is a top view of the rice transplanter of FIG. It is the figure which showed the transmission mechanism of the seedling planting part of the rice transplanter of FIG.1 and FIG.2. It is the figure which showed the connection part of the hook clutch of the rice transplanter of FIG. 1, and the cable for the action | operation. It is the figure which showed the connection part of the seedling feed belt of the rice transplanter of FIG. 1, and the cable for the action | operation. It is a top view of the transmission apparatus part of the seedling planting part of the rice transplanter of FIG. FIG. 2 is a rear plan view including a transmission device part of a seedling planting part of the rice transplanter of FIG. 1. It is the elements on larger scale (left end part) of the transmission apparatus part of FIG. FIG. 9 is an enlarged view of the vicinity of a branch transmission unit in FIG. 8. It is a side view of the rolling axis | shaft of the rice transplanter of FIG. It is the elements on larger scale (center part) of the transmission apparatus part of FIG.

An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the left view of the rice transplanter as a seedling transplanter of one Embodiment of this invention is shown, and the top view of the rice transplanter of FIG. 1 is shown in FIG. Moreover, in FIG. 3, the transmission mechanism of the seedling planting part N of the rice transplanter of FIG.1 and FIG.2 is shown.
In the present specification, the left and right directions in the forward direction of the rice transplanter are respectively left and right, the forward direction is forward, and the backward direction is rear.

  The traveling vehicle body 56 is a four-wheel drive vehicle including a pair of left and right front wheels 13 and 13 and rear wheels 15 and 15 which are drive wheels, and a transmission case 22 is disposed at the front of the fuselage. A front wheel final case 80 is provided on the left and right sides of the front wheel 13, and the front wheels 13 and 13 are attached to the front wheel axle 14 that protrudes outward from a front wheel support portion that can change the steering direction of the front wheel final case 80. The left and right rear wheel gear cases 81 rotate up and down around the rotation fulcrum axis S, whereby the left and right rear wheels 15 move up and down to follow the field. Rear wheels 15 and 15 are attached to a rear wheel axle 16 projecting outward from the rear wheel gear case 81.

A driver's seat 19 is mounted on the mid cover 18 on the step floor 17 of the vehicle body 56, and an engine E, a fuel tank 21, and the like as drive sources are provided below the seat cover 18. Moreover, the boarding / alighting step 20 at the time of an operator boarding / alighting is provided in the lower left and right sides of the step floor 17.
The rotational power of the engine E is transmitted from the engine output pulley 90 (FIG. 1) to the input shaft of a continuously variable hydrostatic transmission (HST) 93 (FIG. 1) via the belt 91 (FIG. 1). The hydraulic pump is driven from the shaft, and further transmitted from the output shaft of the hydrostatic transmission to the mission in the mission case 22. The rotational power transmitted to the mission in the mission case 22 is shifted by the transmission in the case 22 and then separated into traveling power and external power to be extracted. The traveling power is transmitted from the front wheel final case 80 to the front wheels 13 and 13 and from the rear wheel gear case 81 to the rear wheels 15 and 15 and also to the planting transmission shaft 23.

An auxiliary seedling receiving frame 25 is provided on both the left and right sides of the steering post 24.
Further, a lift link 57 in the form of a parallel link is connected to the rear end portion of the vehicle body 56 so as to be rotatable up and down, and includes a single upper link 57a and a pair of left and right lower links 57b and 57b. These lift links 57 are rotatably attached to a rear-view gate-shaped rear frame 26 whose base side is erected at the rear end of the vehicle body 56. The upper link 57a and the lower links 57b and 57b rotate up and down by the expansion and contraction of the elevating cylinder 27 between the vehicle body 56 and the lower link 57b and the upper link 57a, and the seedling planting portion N remains in a substantially constant posture. Go up and down.

  The hitch link 28 at the rear end of the lift link 57 is provided with a rolling shaft 55 (FIG. 6) having a longitudinal direction in the front-rear direction (located in the R portion in FIG. 1), and can be freely rolled in the left-right direction. There are springs 95 (FIG. 1) on both the left and right sides of the connected rolling shaft 55, and the springs are stretched and contracted to maintain a horizontal state. The spring 95 is connected to the vehicle body 56 side and a support frame 30 described later. Further, the rolling shaft 55 is located at the center in the left-right direction of the vehicle body 56.

  The seedling planting part N has a six-row planting structure, and supports the planting transmission part (seedling planting transmission case) 1 (FIG. 3) and the rolling shaft 55 of the seedling planting part N (support frame 30). Is supported from the traveling vehicle body 56 via the rolling shaft 55), and a seedling mounting portion 6e that places the seedlings and reciprocates left and right to feed the seedlings one by one to the seedling outlet 6b, ... , A seedling tank (seedling device) 6 having a seedling mounting portion 6e, and a seedling planting device 50 for planting seedlings supplied to the seedling outlet 6b,... A pair of left and right line drawing markers (not shown) and the like are provided. Each seedling mounting portion 6e accommodates and feeds out a rectangular mat seedling, and is configured to have a rearward downward slope. A seedling feeding belt 6c is provided at the bottom of the lower end, and this seedling feeding belt 6c is driven intermittently. The seedlings are fed out every certain amount. Specifically, the seedling tank 6 has mat seedlings placed on a plurality of seedling mounting portions 6e provided on the left and right sides, and reciprocates left and right, so that the seedling receiving plate (front plate) 6a in each row is divided into one stock. When the seedlings are supplied to the seedling outlet 6b and all the seedlings in the horizontal row are supplied to the seedling outlet 6b, the seedlings are transferred downward by the seedling feeding belt 6c.

  Then, the seedling planting tool 59 of the seedling planting apparatus 50 operates with its tip drawn in a closed loop locus, and cuts out one stock of seedlings and implants them into the soil. Moreover, the seedling mounting part 6e is divided for every mat seedling by the partition protrusion part 6d. The seedling feeding belt 6c transports the seedling in the front-rear direction or the vertical direction toward the forward direction of the vehicle body 56. In the present embodiment, the seedling feeding belt 6 c transfers seedlings to the lower rear part in the forward direction of the vehicle body 56.

  In the lower part of the seedling planting part N, a center float 51 is provided in the center, and side floats 52 are provided on both the left and right sides thereof, and the aircraft is placed with the center float 51 and the side floats 52 in contact with the mud surface of the field. If it advances, the center float 51 and the side float 52 will slide while leveling the muddy surface, and seedlings will be planted by the seedling planting devices 50,. The center float 51 and the side float 52 support the rear part so as to be rotatable around the float shaft 40 (FIGS. 1 and 10) at the rear end of the depth frame 115, and the depth frame 115 is supported with respect to the support frame 30. In this configuration, the height of the float shaft 40 can be adjusted by making it vertically rotatable.

Each float (center float 51, side float 52) moves up and down on the front end side according to the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float 51 is the angle sensor 53 (FIG. 1) during planting work. By switching the hydraulic valve 29 (FIG. 1) that controls the lifting cylinder 27 in accordance with the detection result, the seedling planting part N is raised and lowered, so that the seedling planting depth is always kept constant.
Further, a planting depth adjusting lever 33 (FIG. 7) for manually adjusting the planting depth of the seedling is provided. The base end portion of the planting depth adjustment lever 33 is fixedly connected to the rotation shaft 35 of the depth frame 115 (FIGS. 1 and 10) for changing the planting depth of the seedling. By operating, the depth frame 115 can be rotated up and down to change the seedling planting depth. Next to the planting depth adjustment lever 33, the seedling removal amount adjustment lever 34 (see FIG. 1, FIG. 2) for changing the amount of seedlings per strain taken out by the seedling planting device 50 (FIG. 1, FIG. 2) at the seedling outlet 6 b. 7).

The planting transmission portion 1 of the seedling planting device 50 has a wide shape in the left-right direction, and the rear portion is branched left and right and protrudes rearward along the upper portions of the center floats 51 and the side floats 52. The branch part is formed in the.
The power transmitted to the seedling planting portion N by the planting transmission shaft 23 is transmitted into the planting transmission portion 1 provided in the seedling planting portion N, and the seedling planting device for each strip from the planting transmission portion 1 is transmitted. 50 and the seedling feed belt 6c. A branching transmission part 41 that branches power in the planting transmission part 1 and transmits it to the seedling planting device 50 in units of every two strips is provided, and a planting part that turns on and off the transmission of the branching transmission part 41 A clutch 61 is provided, and power is conducted from the planting partial clutch 61 to the branch transmission unit 41 by a chain 178 (FIG. 3). It can be stopped every time.

The planting partial clutch 61 that switches the operation and stop of the seedling planting device 50 in two adjacent units is often operated to “cut” at the time of work at the shoreline. "is called. An interlocking mechanism that stops the seedling feeding belt 6c of the planting strip corresponding to the operation of the planting partial clutch 61 is also provided. Reed clutch levers 62 (FIG. 1) for operating the planting partial clutch 61 are provided on the rear side of the driver's seat 19 and in front of the upper portion of the seedling tank 6.
Further, as shown in FIG. 3, the seedling feed driving cam 170 is always rotated by driving from the power in the planting transmission section 1, and the seedling feeding drive cam 170 is driven at the left and right moving ends of the seedling placement section 6e. , 172, the seedling feeding arms 172, 172 are driven, and are transmitted to the left and right seedling feeding partial clutch 63 via the rotating shaft 174 and the left and right links 176, 176, and the seedling feeding partial clutch 63 is fed. The driving roller 220 is driven to drive the seedling feeding belt 6c. 4 shows a connection portion between the planting partial clutch 61 and the planting cable 72 for operation thereof, and FIG. 5 shows a connection portion between the seedling feeding belt 6c and the seedling feeding cable 73 for operation thereof. ing.
The planting partial clutch 61 provided in the planting transmission unit 1 includes a drive-side clutch body 206 fixed to the transmission shaft 50a of the seedling planting device 50, and a clutch tooth 206a of the clutch body 206 that is detachable. A passive clutch body 207 having 207a is provided, and the passive clutch body 207 is always urged toward the transmission shaft 50a by a spring 209, a sprocket 210, and a washer 211. It is in an operating state (a state where the planting cable 72 is pulled).

  A clutch pin groove 207b is provided on the side surface of the passive clutch body 207, and a hook clutch pin 213 connected to the tip of the planting cable 72 is detachably provided in the groove.畦 Clutch pin 213 is provided in the hole so as to pass through the hole in the wall surface of planting transmission unit 1, and can be protruded from the wall surface of planting transmission unit 1 to the inside of planting transmission unit 1 by spring 214. . Therefore, when the planting cable 72 is pulled, the hook clutch pin 213 is moved in the direction of being pulled out of the clutch pin groove 207b of the passive clutch body 207. When the hook pin 213 is pulled out in the clutch pin groove 207b of the passive clutch body 207 by a predetermined pulling amount, the planting partial clutch 61 is "on" by the urging force of the spring 214. When the planting partial clutch 61 does not plant seedlings (planting partial clutch 61: “OFF”), the planting partial clutch 61 is a fixed position stop clutch. Becomes “ON”.

When the planting partial clutch 61 is disengaged, the planting cable 72 is loosened, so that the heel clutch pin 213 enters the clutch pin groove 207b by the urging of the compression spring 214, and in this state, the passive side clutch body As the 207 rotates, the passive clutch body 207 gradually moves to the compression spring 209 side against the compression spring 209 by the guide of the clutch pin groove 207b, and the passive clutch body 207 has a predetermined rotational position (clutch). The clutch teeth 206a and 207a are disengaged for the first time in a state where the saddle clutch pin 213 is positioned at the rotational direction end of the pin groove 207b, and the passive clutch body 207 stops at a fixed position. Note that the compression spring 214 is not contracted by the urging force of the compression spring 209 and the hook clutch pin 213 is not pushed back to the planting cable 72 side.
When the planting partial clutch 61 is “ON”, the chain 216 locked to the sprocket 210 is driven, and the seedling planting device 50 is activated.

  FIG. 5 shows the configuration of the operating mechanism of the seedling feeding belt 6c. The seedling feeding cable 73 is connected to one end of an L-shaped shifter arm 219, and the other end of the shifter arm 219 is connected to the driving side clutch body 221 of the seedling feeding driving roller 220. The drive-side clutch body 221 is switched to “ON” and “OFF” in accordance with the movement of the “ON” and “OFF” sides of the valve, and constitutes a seedling feeding partial clutch 63. The drive side clutch body 221 can be engaged with and disengaged from the seedling feed roller 220 via the clutch teeth 220a and 221a. The seedling feed drive roller 220 is adjacent to the seedling feed drive 220 on the side opposite to the drive side clutch body 221. It is connected via a clutch tooth that is always meshed with the roller 220. A seedling feed driven roller 223 is provided at a position parallel to the seedling feed drive roller 220, and a seedling feed belt 6 c is wound between the drive roller 220 and the driven roller 223.

  By operating the heel clutch lever 62, the passive side clutch body 207 of the planting partial clutch 61 can be switched between operation and non-operation, and the drive side clutch body 221 of the seedling feeding belt 6c is switched between operation and non-operation. Can do. That is, the planting cable 72 for operating the cocoon clutch can be moved to the cocoon clutch operating side, and at the same time, the seedling feeding cable 73 for activating the seedling feeding belt can be moved to the seedling feeding belt operating side. The planting cable 72 can be moved to the heel clutch non-operating side, and at the same time, the seedling feeding cable 73 for operating the seedling feeding belt can be moved to the seedling feeding belt non-operating side. As described above, the seedling planting device 50 and the seedling feeding belt 6c can be operated simultaneously by operating the hook clutch levers 62, and can be deactivated simultaneously.

In FIG. 6, the top view of the planting transmission part 1 of the seedling planting part N of the rice transplanter of FIG. 1 is shown. Moreover, in FIG. 7, the rear part top view including the planting transmission part 1 of the seedling planting part N of the rice transplanter of FIG. 1 is shown.
The planting transmission portion 1 is formed in a fork-like shape by connecting a side case 43 to the left and right side portions of the center case 2 via a spacer case 44 in the form of a tube as an integral structure. A rolling shaft 55 is provided at substantially the same position of the center case 2 portion corresponding to the handle portion of the fork-like shape, and an input shaft 3 is provided at a right side position to be connected to the planting transmission shaft 23.

  A planting case 36 is provided on each of the left and right sides of the planting shaft 9 mounted on the rear end of each center case 2 and side case 43. At the front and rear ends of each planting case 36, a seedling planting tool 59 supported by a frame 46 connected to the planting shaft 9 is provided. While being driven, the seedling separated and held at the upper seedling outlet 6b is planted on the soil surface, and the center case 2 and the side case 43 are formed in a double-row planting form, and a six-row planting structure is formed as a whole.

  Between the center case 2 and the front part of the side case 43, the transmission shaft 4 is mounted in the lateral direction through the inside of the spacer case 44. From the transmission shaft 4, the branch transmission unit 41, the center case 2, and the side case 43 The planting shaft 9 is transmitted and rotated through a chain 178 which is a vertical transmission mechanism. Further, each branch transmission portion 41 is provided with a planting partial clutch 61. By turning this planting partial clutch 61 on and off, transmission to the center case 2 and the side case 43 is turned on and off. When the heel clutch lever 62 (FIG. 7) is operated in the direction of arrow A, the planting partial clutch 61 is engaged, and when the heel clutch lever 62 is operated in the direction opposite to the direction of arrow A, the planting partial clutch 61 is disengaged. Become.

Since the planting partial clutch 61 is provided for each center case 2 and each side case 43, the planting partial clutch 61 can be operated by cutting the planting partial clutch 61 over a number of areas where the seedling planting operation is to be stopped by the dredging operation. . At this time, each planting partial clutch 61 is configured to turn on and off the transmission of the bifurcated branch transmission portion 41, and therefore, the planting partial clutch 61 is operated for each double planting.
Further, each branch transmission portion 41 is provided with a safety clutch 8, and the safety clutch 8 is a clutch that transmits power between the transmission shaft 4 and the chain sprocket 67 on the transmission shaft 4 of the branch transmission portion 41. A claw is provided and pressed by the spring 68 toward the chain sprocket 67 side. The chain sprocket 67 is rotatable around the transmission shaft 4, and the seedling planting overload acts on the chain sprocket 67 side, whereby the safety clutch 8 part is disengaged.

  A cam shaft transmission case 12 is formed on the right side of the chain 178 and the rolling shaft 55 at the front portion of the center case 2 at the center, and is provided along the lateral direction below the bottom of the seedling mounting portion 6e. The right end portion of the lead cam shaft 10 is supported. In the camshaft transmission case 12, a camshaft transmission mechanism 11 comprising a chain transmission between the right end of the lead camshaft 10 and the transmission shaft 4 is provided, and a lateral transmission comprising the camshaft transmission mechanism 11 and the camshaft transmission case 12 is provided. The power is transmitted from the transmission shaft 4 to the lead cam shaft 10 by the portion.

  This lead cam shaft 10 is formed with a reciprocating spiral cam groove 47 on its peripheral surface, and a lead cam 48 protruding on the bottom surface of the bottom of the seedling mounting portion 6e supported so as to be movable left and right is fitted to rotate the lead cam shaft 10. Thus, the seedling mounting portion 6e is reciprocated left and right across the tank width. A seedling feed driving cam 170 is provided at the tip of the lead cam shaft 10, and the seedling feeding arm 172 (FIG. 3) is driven by the rotation of the seedling feeding drive cam 170, so that the seedling placement portion 6 e is at the left and right lateral ends. Each time it moves, the seedling feeding belt 6c is driven by a certain amount, and the mat seedling of the seedling mounting portion 6e is transferred to the seedling receiving plate 6a side.

  At the time of seedling planting, the seedling planting part N is in a state of being freely rollable around the rolling shaft 55, and when the soil surface, the cultivator, etc. are tilted to the left and right by the ground sliding of the center float 51 and the side float 52, this rolling shaft Rolling control is performed around 55, the sliding soil surface by each of the floats 51 and 52 is leveled so as to be as horizontal as possible, and the seedling planting depth is maintained to be uniform.

The transmission mechanism of the seedling planting part N will be described.
Power from the engine E is transmitted to the input shaft 3 through the planting transmission shaft 23 and the transmission shaft 4 rotates, and the center case 2 and the side case 43 portion planting partial clutch 61, the safety clutch 8, and the branch transmission. The seedling planting tool 59 operates through the part 41, the chain 178, and the like. Further, the lead cam shaft 10 rotates from the transmission shaft 4 through the cam shaft transmission mechanism 11 in the cam shaft transmission case 12, and the seedling mounting portion 6e reciprocates left and right, so that the seedlings are sequentially placed on the seedling outlet 6b. Supply. In addition, when the seedling placement part 6e reaches the left and right ends together with the seedling supply operation, the seedling feeding drive cam 170 drives the seedling feeding arm 172 (FIG. 3), and the seedling feeding belt 6c transports the seedling downward. . In this way, the mat-like seedlings housed in the seedling placing part 6e are fed to the seedling receiving plate 6a side, and each seedling planting tool that acts on the seedling outlet 6b of the seedling receiving plate 6a. 59, and is planted on the soil surface leveled by the center float 51 and the side floats 52.

In the planting transmission portion 1 of the seedling planting device 50, the lateral transmission portion including the camshaft transmission mechanism 11 and the camshaft transmission case 12 is disposed on the left and right sides (right side in the present embodiment) of the vehicle body 56, and the lead camshaft. The seedling feed drive cam 170 provided at the left and right inner end portions of the vehicle 10 is disposed on the same side as the lateral transmission portions 11 and 12 with respect to the rolling shaft 55 located at the center portion in the left and right direction of the vehicle body 56.
If the camshaft transmission mechanism 11 or the camshaft transmission case 12 is positioned at the center of the left and right sides of the machine body, these cannot be easily detached and inferior in maintainability. Further, if the length of the lead cam shaft 10 for transmitting the power input from the input shaft 3 to the seedling feeding arm 172 is long, the lateral width (width in the left-right direction) is taken only by this transmission mechanism, and the seedling transplanter Will lead to an increase in size.

However, according to the present embodiment, the lateral transmission portion (cam shaft transmission mechanism 11, cam shaft transmission case 12) of the seedling tank 6, the lead cam shaft 10, the lead cam 48, and the seedling feed drive cam 170 are connected to the left and right sides of the vehicle body 56. Since these can be easily attached, detached and repaired from the left and right sides of the machine body, the maintainability is improved.
In addition, since the seedling feed drive cam 170 at the inner end in the left-right direction of the lead cam shaft 10 is positioned between the lateral transmission portions 11 and 12 and the rolling shaft 55, the lead cam shaft 10 is not unnecessarily lengthened. The lateral width of the shaft 10 can be suppressed. Therefore, it becomes a compact and low-cost transmission mechanism of the seedling planting portion N, and the compaction of the seedling transplanting machine is also achieved by the transmission mechanism that suppresses the lateral width in this way.

Further, as shown in FIGS. 6 and 7, the input shaft 3 for inputting power to the seedling planting part N and the lead cam shaft 10 are crossed in a plan view, and the seedling feed driving cam 170 is further left and right than the input shaft 3. By providing the inner side in the direction, the input shaft 3 and the lead cam shaft 10 can be arranged close to each other while the input shaft 3 and the seedling feed drive cam 170 do not interfere with each other, and space can be effectively used to make the airframe compact.
Further, as shown in FIG. 7, the lateral transmission portions 11 and 12 are arranged on the outer side in the left-right direction with respect to the rim 85 located at the center of the rear wheel 15, so It can be detached and repaired from the side, further improving maintainability.

FIG. 8 shows a partially enlarged view (left end portion) of the planting transmission portion 1 of FIG. 6, and FIG. 9 shows an enlarged view of the vicinity of the branch transmission portion 41 of FIG.
And according to this embodiment, it branches to each branch transmission part 41 from the transmission shaft 4 provided over the horizontal direction (left-right direction), and is transmitted to the seedling planting apparatus 50 of each row | line, The safety clutch 8 is provided separately from the planting partial clutch 61. Further, the safety clutch 8 is disposed on the front shaft of each side case 43 and the center case 2.

And it is good also as a structure which became independent from each side case 43 and the center case 2 by making this safety clutch 8 into a unit (part shown by X).
The safety clutch 8 is actuated by driving of the boss 100 fitted to the outer periphery of the transmission shaft 4, the spring 68 wound around the boss 100, the driving pawl 102 that is pressed and driven, and the driving pawl 102. It consists of a driven claw 103 and the like.

The safety clutch 8 is pressed to the side of the chain sprocket 67 by the spring 68, and the spring 68 is distorted (compressed) due to the seedling overload acting on the branch transmission part 41 side rotating integrally with the chain sprocket 67. ), The driving claw 102 moves to the opposite side of the chain sprocket 67, the driving claw 102 and the driven claw 103 are disengaged, and the safety clutch 8 is disengaged. The clutch claw of the safety clutch 8 has a side case side surface 43a formed of an inclined surface. Due to the inclined surface 43a, a component force is generated in the axial direction of the transmission shaft 4 when an overload is applied. Therefore, the side surfaces of the clutch pawls (the drive pawl 102 and the driven pawl 103) slide and the drive pawl 102 moves to the side where the clutch pawls are disengaged.
If the safety clutch 8 is not independent from the side cases 43 and the center case 2, torque management, that is, adjustment of the breaking load of the safety clutch 8 cannot be performed as a single unit. This adjustment is performed by changing the position of the end of the spring 68 depending on how many receiving plates 105 (FIG. 9) that receive the end of the spring 68 are inserted (two in the drawing). The receiving plate 105 is stopped by a retaining ring 109 (FIG. 9) that engages with the cylinder 107 (FIG. 9), and the cylinder 107 is stopped by a washer 110 (FIG. 9). The safety clutch 8 composed of these structures is stopped by a pin 108 (FIG. 9) inserted into the transmission shaft 4, and can be detached from the transmission shaft 4 as a unit while maintaining the breaking load of the safety clutch 8.

Conventionally, for example, in the configuration in which the spring 68 is provided between the side case 43 and the receiving plate 105 attached to the center case 2 side and the drive claw 102, the drive claw 102 and the spring 68 are removed when the safety clutch 8 is removed for maintenance. It is difficult to separate and reassemble, and it is necessary to adjust the cutting load again. In addition, since the spring 68 is provided between the side case 43 and the center case 2 side and the driving claw 102, an error in the positional relationship between the case side and the driving claw 102 is likely to occur due to changes over time, and the breaking load is not reduced. There is also a risk of becoming appropriate.
In the past, the safety clutch 8 and the planting partial clutch 61 were shared by the same clutch pawl, and the spring 68 was applied to the sprocket 67. Therefore, the safety clutch could be easily removed while maintaining the breaking load. There wasn't. However, this configuration can solve the above problem.

FIG. 10 shows a side view of the rolling shaft 55 of the rice transplanter shown in FIG.
Although the rolling shaft 55 is supported by the support frame 30 and the periphery thereof is protected, the planting depth adjusting lever 33 and the rotation shaft 35 of the depth frame 115 may be supported on the support frame 30.
For example, as shown in FIG. 10, the support shaft 37 is fixed to the support frame 30 and the rotation shaft 35 is supported, so that the rotation shaft 35 rotates about the axis with respect to the support frame 30. . By supporting the rotation shaft 35 of the depth frame 115 by the support frame 30, the strength of the depth frame 115 can be secured and the support configuration can be simplified. By pulling, the depth frame 115 and the rotation shaft 35 can be held at appropriate positions.

In FIG. 11, the elements on larger scale (center part) of the transmission apparatus part of FIG. 6 are shown. In the round frame portion Y, the center case 2, the spacer case 44, and the support frame 30 are separated so that the shape and arrangement of each frame can be easily understood.
The center case 2 is sandwiched from both left and right sides by a tube type spacer case 44 and fixedly connected to the spacer case 44 by bolts 111. The front surface 44a of the spacer case 44 and the rear surface 30a of the support frame 30 are fixedly connected by bolts 112. ing. As described above, the support frame 30 may be supported by the spacer case 44.

As shown in FIG. 11, two left and right portions of the support frame 30 on the left and right outer sides than the center case 2 are attached and fixed to the spacer case 44 with bolts 112 or the like. Further, the support frame rear surface 30a and the front surface 44a of the spacer case 44 facing each other are fixed together so that the mounting surface 30a on the rear surface of the support frame 30 is parallel to the left-right direction of the airframe (longitudinal direction of the spacer case 44). .
The center case 2 side end portion 44b of the spacer case 44 has a larger diameter than the other portions, and has a shape protruding forward in plan view. The support structure is strengthened by fixing the support frame rear surface 30a to the front surface of the protruding portion.

  With this configuration, even if the accuracy of each member such as the center case 2 and the spacer case 44 is somewhat lowered, it is easy to ensure the required accuracy dimensions after assembly. In addition, when the manufacturing accuracy of the center case 2 and the spacer case 44 is increased, the cost is high, but the manufacturing accuracy of the center case 2 and the spacer case 44 is not so strict. For example, the mounting holes 30b of the support frame 30 are oblong holes. Then, it can be assembled and the cost can be reduced. Further, the support frame 30 has a strong support structure by fixing the support frame rear surface 30a and the spacer case front surface 44a facing each other so that the mounting surface 30a on the rear surface of the support frame 30 is parallel to the spacer case 44. It becomes.

  The seedling transplanter of the present invention is not limited to a rice transplanter, and may be used as a seedling transplanter for planting other seedlings such as vegetable seedlings. Also, a riding seedling transplanter or a walking seedling transplanter may be used.

DESCRIPTION OF SYMBOLS 1 Planting transmission part 2 Center case 3 Input shaft 4 Transmission shaft 6 Seedling tank 6a Seedling receiving plate 6b Seedling outlet 6b Seedling outlet 6c Seedling feeding belt 6d Partitioning ridge 6e Seedling part 8 Safety clutch 9 Planting shaft 10 Lead cam shaft 11 Cam shaft transmission mechanism 12 Cam shaft transmission case 13 Front wheel 14 Front wheel axle 15 Rear wheel 16 Rear wheel axle 17 Step floor 18 Mid cover 19 Driver's seat 20 Getting on / off step 21 Fuel tank 22 Mission case 23 Planting transmission shaft 24 Steering post 25 Auxiliary seedling receiving frame 26 Rear frame 27 Elevating cylinder 28 Hitch link 29 Hydraulic valve 30 Support frame 30a Mounting surface (rear surface) 30b Mounting hole 33 Planting depth adjusting lever 34 Seedling amount adjusting lever 35 Rotating shaft 36 Planting case 37 Support Arm 40 Float shaft 41 Branch transmission part 43 Id case 44 Spacer case 44a Mounting surface (front surface) 46 Frame 47 Cam groove 48 Lead cam 50 Seedling planting device 50a Transmission shaft 51 Center float 52 Side float 53 Angle of attack sensor 55 Rolling shaft 56 Traveling vehicle body 57 Lift link 57a Upper link 57b Lower link 59 seedling planting tool 61 planting partial clutch 62 hook clutch lever 63 seedling feeding partial clutch 67 chain sprocket 68 spring 72 planting cable 73 seedling feeding cable 80 front wheel final case 81 rear wheel gear case 85 rim 90 engine output pulley 91 Belt 93 Hydrostatic transmission 95 Spring 100 Boss 102 Drive claw 103 Driven claw 105 Receptacle 107 Cylindrical body 108 Pin 109 Retaining ring 110 Washer 111, 112 Bolt 115 Depth frame 1 0 Seedling feed cam 172 Seedling feed arm 174 Rotating shaft 176 Link 178 Chain 206 Drive side clutch body 207 Passive side clutch body 206a, 207a Clutch tooth 207b Clutch pin groove 209, 214 Spring 210 Sprocket 211 Washer 213 畦 Clutch pin 216 Chain 219 L-shaped shifter arm 220 Seedling feed drive roller 221 Drive side clutch body 220a, 221a Clutch tooth 223 Driven roller E Engine N Seedling planting part S Rotating fulcrum shaft

Claims (2)

A traveling vehicle body (56) comprising left and right front wheels (13) and left and right rear wheels (15);
A drive source (E) provided on the traveling vehicle body (56);
A rolling shaft (55) which is provided behind the traveling vehicle body (56) and in the center in the left-right direction toward the forward direction of the traveling vehicle body (56) and has a longitudinal direction in the front-rear direction;
A plurality of seedlings are connected to the rear of the traveling vehicle body (56) so as to be movable up and down and to be able to roll in the left and right directions around the rolling shaft (55). The seedlings on the seedling mounting part (6e) are moved left and right and supplied one by one from the part (6e) to the seedling outlets (6b) provided on the left and right so as to correspond to each seedling mounting part (6e). Once the seedlings in the left-right direction are taken out from the seedling outlet (6b), the seedling feeding device (6) sends the seedlings in the next row to the seedling outlet (6b) by the seedling feeding belt (6c) that transports the seedlings in the front-rear direction or the vertical direction. ) And a seedling transplanting machine having a seedling planting part (N) provided with a seedling planting device (50) for planting a seedling taken out from the seedling outlet (6b),
A lateral transmission portion (11, 12) provided to be deviated to the left or right side in the forward direction of the traveling vehicle body (56), and for transmitting power from the drive source (E);
A lead cam that is provided on the inner side in the left-right direction with respect to the forward transmission direction of the traveling vehicle body (56) and is driven to rotate by being transmitted with power from the lateral transmission portion (11, 12). An axis (10);
The seedling feeder (6e) of the seedling feeder (6) and the lead cam shaft (10) are connected to each other, and the lead cam shaft (10) rotates to move in the left-right direction toward the forward direction of the traveling vehicle body (56). A lead cam (48) for moving the seedling on the seedling mounting portion (6e) to the left and right;
A seedling feeding arm (172) connected to the seedling feeding belt (6c) of the seedling feeding device (6) and driving the seedling feeding belt (6c);
A laterally inner end portion of the lead cam shaft (10) toward the forward direction of the traveling vehicle body (56) and provided on the side of the lateral transmission portion (11, 12) with respect to the rolling shaft (55), A seedling transplanting machine having a seedling feeding drive cam (170) for driving the seedling feeding arm (172) at the left and right moving ends of the mounting portion (6e). The input shaft (3) for inputting power from the drive source (E) to the lateral transmission portion (11, 12) is the same as the lateral transmission portion (11, 12) in the forward direction of the traveling vehicle body (56). Provided on one side of the left and right sides and on the inner side in the left and right direction of the lateral transmission portion (11, 12) at a position intersecting the lead cam shaft (10) in plan view;
The seedling feed drive cam (170) is provided on the inner side in the left-right direction with respect to the input shaft (3) in the forward direction of the traveling vehicle body (56),
The seedling transplanting machine according to claim 1, wherein the lateral transmission part (11, 12) is provided on the outer side in the left-right direction with respect to the rear wheel (15).

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