JP2013153676A - Walking-type seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking-type seedling transplanter capable of preventing the transmission cases of right and left wheels and the like from decreasing in durability.SOLUTION: A walking-type seedling transplanter is provided with: right and left transmission cases 4 supporting right and left wheels 5 at their respective rear ends and transmitting a driving force from an engine 2 to the right and left wheels 5; a planting unit U behind a body front frame 6; a steering unit 9 for the wheels 5 behind the planting unit U; a cylinder 16 for rotating the transmission cases 4 vertically using the front end portions of the transmission cases 4 as fulcrums and also for moving the right and left wheels 5 up and down; and a ground-leveling float 12 below the body frame 6. A switching device 110 capable of switching a first raised state in which the transmission cases 4 and the wheels 5 are raised by the cylinder 16 to a second raised state in which they are further raised is provided. By further raising the right and left wheels 5 during transportation or when an operation is not performed, the float 12 is grounded, and the weight of the body can be received by the float 12 and the running wheels 5, whereby application of load to the transmission cases 4 is prevented and durability is improved.

Description

  The present invention relates to a vertical movement mechanism of a wheel of a walking type seedling transplanter.

  A walking type seedling transplanter is described in, for example, Patent Document 1 and Patent Document 2 below. In the walking type seedling transplanter of Patent Document 1, a configuration in which the left and right transmission cases supporting the left and right wheels are moved up and down by a hydraulic cylinder is disclosed. Specifically, left and right arms that rotate integrally with the left and right transmission cases, a relay link member that moves back and forth following the back and forth movement of the cylinder rod of the hydraulic lifting cylinder, the left and right ends of the relay link member, and the arms The left and right connecting rods are connected to each other, and the left and right wheels move up and down via the relay link member, the left and right connecting rods, and the arm as the cylinder rod moves rearward and forward.

  Further, such a walking type seedling transplanter is equipped with a drawing marker that draws a line that serves as a guide for straight advance at the next work position. The drawing marker is operated by pulling or returning a wire provided at the rotation fulcrum portion of the drawing marker so that the drawing marker can be turned upside down to draw a line and can be stowed up and stored during storage. The drawing marker (FIG. 16) disclosed in the walking type seedling transplanter of Patent Document 2 is configured to be operated by a main clutch / marker lever provided near the left steering handle.

JP 2009-118831 A Japanese Unexamined Patent Publication No. 7-016008

  As described above, the walking type seedling transplanter of Patent Document 1 discloses a configuration in which the left and right transmission cases are moved up and down by a hydraulic cylinder. When the hydraulic pressure is weakened, the cylinder rod of the hydraulic lifting cylinder moves forward, the rear ends of the left and right transmission cases are raised, and the left and right wheels connected to the rear ends of the left and right transmission cases are also moved up. On the contrary, the fuselage descends and the float contacts the ground.

  However, since the expansion and contraction width of the hydraulic cylinder is set wide, the rear end of the transmission case does not rise greatly when the hydraulic pressure is weakened, and the float does not touch the ground, so that the weight of the aircraft can be adjusted using only the left and right traveling wheels. There is a problem that the durability of the transmission case, the mounting stay of the transmission case, the axle, etc. is lowered.

The drawing marker of the walking type seedling transplanter of Patent Document 2 is configured to be operated by a main clutch / marker lever provided near the left steering handle.
However, the wire drawing marker and the main clutch / marker lever are connected by a wire. If the wire becomes slack or rusted after long-term use, it may not be linked to the operation of the main clutch / marker lever. There is a problem that decreases.

  Further, when storing the walking type seedling transplanter of Patent Document 1 and Patent Document 2 for a long period of time, a storage stand is attached to the front part of the machine body, and the front part in the traveling direction of the machine body is erected downward and the rear part is directed upward. Although the configuration (the front-rear direction of the airframe is the vertical direction), in order to attach this storage stand, it is necessary to remove the bumper (corresponding to the protective frame 51 of Patent Document 1) at the front of the airframe, so that the storage state There are problems such as that it takes a lot of time for the work to be done and the burden on the worker is large.

  An object of the present invention is to provide a walking seedling transplanter that does not reduce the durability of the transmission cases of the left and right wheels. It is another object of the present invention to provide a walking seedling transplanter that can prevent a decrease in operability during work and storage of the drawing marker. Furthermore, the subject of this invention is providing the walk type | mold seedling transplanting machine by which the burden of an operator is eased, without taking time for the operation | work which puts a seedling transplanting machine in the accommodation state.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 supports the engine (2), the left and right wheels (5), and the left and right wheels (5) at the rear end portion so that the driving force from the engine (2) is Left and right traveling transmission cases (4) that are transmitted to the wheels (5), a vehicle body frame (6) provided between the left and right traveling transmission cases (4), and a farm field provided behind the vehicle body frame (6) A planting part (U) for planting seedlings, a control part (9) provided behind the planting part (U) for steering the left and right wheels (5), and a front end part of the traveling transmission case (4) As a fulcrum, the traveling transmission case (4) is turned up and down and the left and right wheels (5) are moved up and down, and an elevating actuator (16) is provided below the body frame (6). In a walking seedling transplanter with a float (12) for leveling From the first lifted state in which the travel transmission case (4) and the left and right wheels (5) are lifted by the lift actuator (16), the travel transmission case (4) and the left and right wheels (5) are further lifted. This is a walking type seedling transplanter provided with a switching device (110) that can be switched to an elevated state.

  According to a second aspect of the present invention, the elevating actuator (16) is a cylinder provided above the vehicle body frame (6), and the left and right central portions in the forward direction of the left and right wheels (5) are cylinder rods ( 17), the relay link member (18) that moves back and forth following the back and forth movement of the cylinder rod (17), and the rear part penetrates the left and right ends of the relay link member (18), and the front part travels left and right. The left and right connecting rods (20) connected to the rotation fulcrum at the front end of the transmission case (4), and springs provided around the left and right connecting rods (20) behind the through-holes of the relay link member (18) ( 22), receiving plates (23, 24) respectively attached to the front and rear ends of the spring (22), and a restricting tool secured to the left and right connecting rods (20) in front of the through-holes of the relay link member (18). 2 ) And a fixture (25) fixed to the left and right connecting rods (20) behind the spring (22), and the cylinder rod (17) moves backward and forward so that the relay link member (18), The left and right connecting rods (20) and the left and right traveling transmission cases (4) constitute a vertical movement mechanism in which the left and right wheels (5) move up and down. The switching device (110) is arranged on the vehicle body frame (6) side. A support post (103) fixed to the support post, an operation lever (105) that is connected to the support post (103) and that can be pivoted up and down around the connection portion, and an upper end portion of the operation lever (105). A rod (107) that is connected and moved up and down by an operating lever (105), and a receiving plate (23) on the front side in the forward direction of the left and right wheels (5) provided at the lower end of the rod (107) With relay link member (18) And the spacer (101) is inserted, and the spring (22) is extended by pulling out the spacer (101) by the operating lever (105) from the raised state of the left and right wheels (5) by the vertical movement mechanism. When the receiving plate (23) moves the relay link member (18) forward, the left and right wheels (5) are moved by the vertical movement mechanism through the left and right connecting rods (20) and the traveling transmission case (4). The walking seedling transplanter according to claim 1, wherein the walking type seedling transplanter is configured to be switched from a raised state to a second raised state.

  According to a third aspect of the present invention, a line-drawing marker that forms a mark serving as a guide for traveling at adjacent work positions on both the left and right sides of the planting portion (U) in the forward direction of the left and right wheels (5). 120), the left and right steering handles (9a) for steering the left and right wheels (5) in the steering section (9), and the left and right transmission cases (4) below the left and right steering handles (9a). Left and right side clutch levers (41) for operating a side clutch for turning on and off the transmission of power to the left and right steering handles (9a) and left and right outer sides of the left and right side clutch levers (41) and left and right line drawing markers Left and right marker operation levers (122) are provided to switch between a use state where (120) is inverted and a non-use state where (120) is upright, and the left and right marker operation levers (122) and the left and right line drawing markers (120) are When the marker operating lever (122) is operated in the operating state, the left and right connecting mechanisms (124, 126) to be connected are provided, and the notch (122a) hooked on the lower portion of the side clutch lever (41) is provided with the marker operating lever (122). A walking type seedling transplanter according to claim 1 or 2, formed at a lower portion of the pedestal.

  The invention according to claim 4 projects from the notch (122a) inward in the left-right direction of the notch (122a) of the marker operating lever (122) in the forward direction of the left and right wheels (5). When a protrusion (122b) that is pivotable and urged outward is provided inside and outside the notch (122a), and the marker operating lever (122) is operated to use, the protrusion (122a) When the lower part of the side clutch lever (41) hits the lower part of the notch part (122a) and retracts while the lower part of the side clutch lever (41) enters the notch part (122a), the protrusion (122b) is notched. The walking-type seedling transplanter according to claim 3, wherein the walking-type seedling transplanter is configured to rotate outward of the portion (122a) and to be hooked on a lower portion of the side clutch lever (41).

  The invention according to claim 5 is provided on the left and right of the front portion of the vehicle body frame (6), has a bent portion at the front and rear central portion, and the rear portion (140a) is fixed to the vehicle body frame (6) side, and the bent portion is As a fulcrum, the front part (140b) is provided on the upper side of the left and right first arms (140) and the left and right first arms (140), and the front part is provided on the left and right first arms (140). ) And the left and right second arms (142) fixed to the body frame (6) side, the left and right first arms (140), and the left and right second arms (142). A foldable third arm (145) that is pivotally connected to the first arm (140) and the other end to the second arm (142), respectively, and a first arm (140). The third arm ( 45) and a support part (146) for fixing and supporting the front part (140b) of the left and right first arms (140) at the time of folding, and the right and left third arms (145) are folded and obstructed when the seedling transplanter is working. When the seedling transplanter is stored, the support by the left and right support parts (146) is released and the front part (140b) of the first arm (140) is rotated downward and the left and right The arm structure (K) that can be used as a stand when the three arms (145) are extended in the vertical direction and the front part of the seedling transplanting machine stands downward and the rear part stands upward is provided. The walking seedling transplanter according to any one of the above.

  According to the invention described in claim 1, the switching device (110) raises the rear end of the transmission case (4) during transportation or non-working and raises the traveling wheel (5) to float ( 12) is grounded, and the weight of the airframe can be received by the float (12) and the traveling wheel (5), so that a load is prevented from being applied to the transmission case (4), and durability is improved.

  Further, according to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the transmission case (4) is simply switched to a state in which the transmission case (4) is lifted by taking in and out the spacer (101). Since the switching device (110) can be configured, the configuration of the seedling transplanter is simplified.

  Further, according to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the drawing marker (120) is configured to be operable by the marker operating lever (122). This eliminates the need for a wire that is liable to malfunction due to rust or deterioration, so that the drawing marker (120) can be reliably operated, and operability and work efficiency are improved.

  Further, since the marker operating lever (122) is configured to be hooked on the side clutch lever (41), the drawing marker (120) can be moved up or down in conjunction with the operation of the side clutch lever (41). The amount of operation of the drawing marker (120) is reduced, and work efficiency and operability are improved.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the protrusion (122b) protrudes outward from the notch (122a) of the marker operating lever (122). As a result, it becomes a stopper when the lower part of the marker operation lever (122) is hooked on the side clutch lever (41), so that the marker operation lever (122) is detached during the operation and the drawing marker (41) is removed from the side clutch lever (41). 120) can be prevented from being lifted (stored), so that a mark by the drawing marker (120) is surely formed on the field, and straightness and work efficiency are improved.

  When the protrusion (122b) contacts the lower portion of the side clutch lever (41), the protrusion (122b) is retracted into the notch (122a), so that the protrusion (122b) is not obstructed. ) Can be hooked on the side clutch lever (41) as it is, so that the man-hours for operation are reduced and the operability is improved.

  Furthermore, according to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, an arm structure (K) that can be used as a protective body is provided. As a result, the car body can be reliably protected when the seedling transplanter comes into contact with an obstacle or the like, so that the seedling transplanter is less likely to be damaged and the durability is improved. Moreover, since this arm structure (K) can also be used as a stand when the seedling transplanter is stored, the seedling transplanter can be stored without removing the arm structure (K), which is necessary for the work. Time is reduced. Similarly, when the seedling transplanter is changed from the housed state to the used state, the time required for the work is reduced, so that the burden on the operator is also reduced.

It is the whole walk type rice transplanter of one embodiment of the present invention. It is a whole top view of the walk type rice transplanter of FIG. It is an enlarged side view of the attaching part of a planting transmission case. It is an expanded side view of the attachment part of a hydraulic raising / lowering cylinder. It is an enlarged plan view of the relay link member which made a part the cross section. It is a partially expanded side sectional view of a relay link member. It is an enlarged side view which shows the rotation base part of a driving | running | working transmission case. It is the figure which showed the example of the support | pillar and spacer of a switching apparatus. It is a whole top view of the walk type rice transplanter of other embodiments of the present invention. They are a simplified side view and a simplified rear view near the steering handle. It is a simplified rear view near a drawing marker. It is a whole side view of the walking type rice transplanter of other embodiment of this invention. It is a whole side view of the walking type rice transplanter of other embodiment of this invention. It is an enlarged view of the arm structure of FIG. 12 and FIG. Fig.15 (a) is a side view of a seedling planting apparatus, FIG.15 (b) is a figure of the scraper of Fig.15 (a). 16 (a) is a side view of a seedling planting apparatus of an example different from FIG. 15, and FIG. 16 (b) is a diagram of the scraper of FIG. 16 (a).

Embodiments of the present invention will be described below.
1 and 2 show an overall side view and an overall plan view of a walking type rice transplanter 1 as an example of a walking type seedling transplanter.

  This walking type rice transplanter 1 becomes an engine 2 provided at the front end of the machine body, a main transmission case 3 provided on the rear side of the engine 2, and traveling support members provided on the left and right sides of the main transmission case 3. The traveling transmission case 4, left and right wheels 5 driven by power from the traveling transmission case 4, a front frame 6 extending rearward from the rear side surface of the main transmission case 3, and a rear end of the front frame 6 are fixed. A rear frame 8 that is curved and extends obliquely rearward and upward, a planting transmission case 7 that is placed on the upper surface of the front end portion of the rear frame 8, and a control unit 9 that is attached to the rear end of the rear frame 8. Yes. Four seedling planting devices 10 are attached to the lower part of the planting transmission case 7, and a seedling mounting table 11 supported by the frame 8 so as to be movable left and right is provided on the front side of the rear frame 8.

Therefore, the traveling vehicle body S is constituted by the engine 2, the main transmission case 3, the front frame 6 and the rear frame 8, the traveling transmission case 4, the wheels 5, and the like, and the planting transmission case 7, the seedling planting device 10 and the seedling are formed. The planting part U is comprised by the mounting base 11 grade | etc.,.
The four seedling planting devices 10 scrape seeds one by one for each seedling supplied from the seedling mount 11 to the seedling outlet 28, and plant four seedlings simultaneously on the field while running. It becomes the composition of.

  A bonnet cover 43 is provided above the engine 2 and the main transmission case 3. A fuel tank 44 is provided above the engine 2. An oil filler plug 171 and an oil drain plug (not shown) of the fuel tank 44 are provided at the front and rear intermediate positions so that the fuel does not spill even when the fuel tank 44 is inverted when transported.

  At a position extending from above the rear part of the bonnet cover 43 to above the front part of the planting transmission case 7, a preliminary seedling stage 45 on which spare seedlings are placed is provided. The preliminary seedling stage 45 is composed of a frame that combines bars, and is supported by a preliminary seedling stage support frame 46 that extends upward from the front frame 6. Rising portions 47 and 48 are provided on the front, rear, left and right sides of the preliminary seedling mount 45 so that the seedlings mounted by the rising portions 47 and 48 are not dropped off.

  In FIG. 3, the enlarged side view of the connection part of the front frame 6 and the rear frame 8 is shown. A front frame side flange 60 provided at the rear end of the front frame 6 and a rear frame side flange 61 provided at the front end of the rear frame 8 are in contact with each other, and both flanges 60, 61 are fixed bolts 62 and nuts 63. The front frame 6 and the rear frame 8 are fixed to each other and fixed together.

  Between the front frame side flange 60 and the base portion of the front frame 6, front frame side ribs 64 are fixed in two places on the left and right sides to improve the strength of the front frame side flange 60. Further, first ribs 65 on the rear frame side are fixed in two places on the left and right sides between the rear frame side flange 61 and the upper surface of the base portion of the rear frame 8 so as to improve the strength of the rear frame side flange 61. Yes. On the rear frame 8, second ribs 66 located on the rear side of the first ribs 65 are provided at two positions on the left and right.

  Note that the upper end of the rear frame side flange 61 protrudes upward from the upper end of the front frame side flange 60, and a fixing bolt is provided between the protruding portion and the front surface of the center case portion 7a of the planting transmission case 7 to be described later. Two 67 are provided on the left and right, and the planting transmission case 7 is fixed so as not to move.

  The planting transmission case 7 includes a central case portion 7a located at the center of the left and right sides and outer case portions 7b located on the left and right sides. The central case portion 7a is provided with a left / right moving shaft 29 (FIG. 1) and a transmission mechanism for transmission to the central two-row seedling planting device 10, and the outer case portion 7b is provided with a left and right outer one-row seedling planting device 10. A power transmission mechanism is provided, and the power from the planting transmission shaft 15 is transmitted from the central case portion 7a into the outer case portion 7b.

  The bottom surface of the central case portion 7 a is provided with a recess 68 placed on the upper surface of the rear frame 8, and the planting transmission case 7 is placed with the recess 68 placed on the rear frame 8. The rear surface of the first rib 65 of the rear frame 8 is in contact with the front surface of the bottom portion of the central case portion 7a, and the front surface of the second rib 66 is in contact with the rear surface of the bottom portion of the central case portion 7a. The transmission case 7 is firmly held.

  In addition, three floats 12 that are in contact with the farm scene are provided at the lower part of the machine body, and the float 12 slides on the farm scene to level the ground as the machine runs. Among the floats 12, the center float 12 a at the center of the left and right sides of the airframe adjusts the planting position of the two seedling planting devices 10 on the left and right inner sides, and the side floats 12 b on both the left and right outer sides of the airframe have one each on the left and right outer sides. The planting position of the seedling planting apparatus 10 is leveled. The center float 12a has a front end positioned in front of the front end of the side float 12b, is longer in the front / rear length than the side float 12b, is wider in the left / right width than the side float 12b, and has a larger ground contact area than the side float 12b. The center float 12a and the side float 12b are supported so as to be pivotable up and down around the respective pivotal fulcrum shafts 13 (FIG. 1) arranged in the same position of the rear frame 8 in a side view. The part is configured to move up and down following the unevenness of the farm scene.

  The output shaft of the engine 2 enters the main transmission case 3, and the power from the engine 2 is transmitted into the main transmission case 3. In the main transmission case 3, a main clutch capable of cutting off all transmissions to the wheels 5, the seedling planting device 10 and the seedling mounting table 11, power from the main clutch to the wheels 5, and transmission paths and seedlings A power branching portion that branches into a planting device 10 and a transmission path to the seedling stage 11, and the seedling planting device 10 and the seedling stage 11 on the transmission path to the seedling planting device 10 and the seedling stage 11. By switching the planting clutch that can cut off the transmission to the wheel 5 and the gear meshing on the transmission path to the wheel 5, the forward high speed state for traveling on the road, the forward low speed state for planting work, the gear does not mesh and the non-engagement There are provided a speed changer that can change gears by switching between a neutral state and a reverse state to be transmitted, and left and right side clutches that can switch the transmission to the left and right wheels 5 to the non-transmission state on the lower transmission side of the speed changer. ing. Therefore, it is transmitted to the left and right traveling transmission shafts 180 protruding left and right from the main transmission case 3 via the transmission and side clutches.

  The traveling transmission shaft 180 is inserted into the traveling transmission case 4 and is transmitted to the axle 14 projecting outward from the traveling transmission case 4 by the sprocket and the chain in the traveling transmission case 4. 5 rotates. The traveling transmission case 4 is provided so as to be rotatable up and down around the traveling transmission shaft located at the front end, and moves the wheel 5 up and down by moving the axle 14 located at the rear end up and down. Further, the planting clutch is transmitted into the planting transmission case 7 through the planting transmission shaft 15 extending rearward from the main transmission case 3 by the transmission of the planting clutch.

  The seedling planting device 10 and the seedling mount 11 are operated by the power from the planting transmission case 7. The seedling stand 11 is supported from both left and right ends of a left and right moving shaft 29 that protrudes to the left and right of the planting transmission case 7 via left and right connecting members 30, and reciprocates left and right along the seedling receiving plate 27. Then, seedlings are supplied one by one to the seedling inlet 28 of each strip provided on the seedling receiving plate 27. A left / right moving rail 34 is fixedly provided on the upper portion of the seedling table 11, and the left / right moving rail 34 (FIG. 1) is supported from the upper portion of the rear frame 8. It is supported by the guide 33 so that it can move left and right. Accordingly, the seedling stage 11 is supported by the seedling receiving plate 27 at the lower part so as to be movable left and right, and supported at the upper part by the support roller 33 so as to be movable left and right. It is the structure which reciprocates right and left via. In addition, the seedling mount 11 is provided with a seedling feeding belt 35 for each strip for transferring seedlings to the lower side of the seedling inlet 28 at the left and right moving ends. The seedling feeding belt 35 is operated by the power from the planting transmission case 7, transfers one mat seedling at the left and right moving ends of the seedling mount 11, and supplies the seedling to the seedling inlet 28.

  Note that left and right side clutch levers 41 are provided below the left and right steering handles 9 a of the control unit 9, and the left and right side clutches in the main transmission case 3 are operated by the side clutch levers 41. ing.

  In this walking type rice transplanter 1, the operator holds the left and right control handles 9a of the control unit 9, operates the planting lift lever 37 to the planting position, lowers the machine body, and operates the planting unit Then, by operating the planting part while operating the main clutch lever 36 to the on position and running the aircraft, seedlings for four strips are planted simultaneously in the field. When reaching the edge of the field, the planting lift lever 37 is operated to the raised position to stop the operation of the planting part and the machine body is raised, and the traveling transmission case 4 is rotated downward to remove the float 12 from the field. In a floating state, the side clutch lever 41 on the inner side of the turn is operated to disconnect the side clutch of the wheel 5 on the inner side of the turn, and the body is turned.

Below, the vertical transmission mechanism of the driving | running | working transmission case 4 and the wheel 5 is demonstrated.
FIG. 4 shows an enlarged side view of the mounting portion of the hydraulic lifting cylinder.
In FIG. 4, a hydraulic pump is fixed to the left side of the main transmission case 3, a hydraulic valve unit 69 is fixed to the rear of the main transmission case 3, and a single-acting type is provided to the rear of the hydraulic valve unit 69. The hydraulic lifting cylinder 16 is fixed. The hydraulic elevating cylinder 16 includes a cylinder rod 17 serving as a moving member that moves in the front-rear direction, and is disposed above the front frame 6. When the hydraulic pressure from the hydraulic pump is supplied to the hydraulic lift cylinder 16 by the switching operation of the hydraulic valve unit 69, the cylinder rod 17 moves backward. Further, when switching to a state in which the hydraulic pressure in the hydraulic lifting cylinder 16 is returned to the main transmission case 3 serving as a hydraulic tank, the cylinder rod 17 moves forward due to the weight of the machine body.

5 and 6 are a plan view and a side view of the relay link member 18 connected to the rear end portion of the cylinder rod 17.
5 and 6, the rear end portion of the cylinder rod 17 is provided with a notch groove 17a that is notched from the rear side and communicates in the left-right direction, and serves as a relay member that extends to the left and right of the notch groove 17a. It is inserted so that the left and right central portions of 18 are fitted. The relay link member 18 includes a plate-like base portion 18a and connecting portions 18b that rise upward from the base portion 18a at both left and right ends, and has a symmetrical shape.

  A connecting shaft 19 that vertically passes through the notch groove 17 a is provided at the rear end of the cylinder rod 17, and the connecting shaft 19 has a first hole 18 c provided in the left and right center portion of the relay link member 18. The cylinder rod 17 and the relay link member 18 are connected through the through hole. Note that the front surface 18d at the center of the left and right of the relay link member 18 and the bottom surface 17b of the cutout groove 17a are flat surfaces that are in contact with each other. The first hole 18c is set to have a larger hole diameter than the shaft diameter of the connecting shaft 19, and is formed in a long hole shape that is long in the front-rear direction.

  The connecting portion 18b of the relay link member 18 includes a front side portion 18b-1 and a rear side portion 18b-2, and further connects the front side portion 18b-1 and the rear side portion 18b-2 at the outer side in the left-right direction of the airframe. A connecting portion 18b-3 to be connected is provided. The front part 18b-1 and the rear part 18b-2 are provided with a second hole 18b-4 penetrating in the front-rear direction, and the rear part of the connecting rod 20 passes through the hole 18b-4. Therefore, the left and right connecting rods 20 penetrate the left and right connecting portions 18b of the relay link member 18.

The front end of the connecting rod 20 is connected to the left and right arms 21 fixed to the traveling transmission shaft 180 at the front end of the traveling transmission case 4.
A spring (compression spring) 22 is provided on the outer periphery of the rear end of the connecting rod 20, a front receiving plate 23 provided on the front side of the spring 22 contacts the rear surface of the spacer 101, and the front surface of the spacer 101 is located behind the connecting portion 18b. A double nut that is in contact with the rear surface of the side portion 18b-2 and double-tightened with a nut so that the rear receiving plate 24 provided on the rear side of the spring 22 is tightened so as not to move to the connecting rod 20. 25 is in contact with the front surface.

  Therefore, the relay link member 18 receives the ground load of the wheel 5 through the traveling transmission case 4, the arm 21, the connecting rod 20, the spring 22, and the like. A plate-like restricting tool 26 is fixed to the middle part of the connecting rod 20, and the restricting tool 26 is located on the front side of the front portion 18b-1 of the connecting part 18b. Accordingly, when the ground contact load of the wheel 5 is extremely small, the restrictor 26 comes into contact with the front surface of the front portion 18b-1 of the connecting portion 18b by the spring force of the spring 22 (expanding), and the wheel 5 falls below a predetermined value. It is regulated not to. The mutual contact surfaces of the front receiving plate 23 and the rear portion 18b-2 of the connecting portion 18b and the mutual contact surfaces of the restrictor 26 and the front portion 18b-1 of the connecting portion 18b are flat. . The second hole 18b-4 is set to have a larger hole diameter than the shaft diameter of the connecting rod 20.

  Therefore, when the hydraulic valve unit 69 is switched to supply the hydraulic pressure from the hydraulic pump into the hydraulic lift cylinder 16, the cylinder rod 17 moves rearward, and the left and right central portions of the relay link member 18 at the bottom surface 17b of the notch groove 17a. The front link 18d is pushed rearward, the relay link member 18 moves rearward, and the rear portion 18b-2 of the left and right connecting portions 18b of the relay link member 18 compresses the springs 22 and the left and right connecting rods. By pulling 20 to the rear side and rotating the left and right arms 21 to the rear side, the left and right traveling transmission cases 4 rotate downward with the traveling transmission shaft 180 as a fulcrum, and the rear end of the traveling transmission case 4 The left and right wheels 5 attached to the vehicle move downward and the aircraft rises with respect to the field.

  On the other hand, when the hydraulic valve unit 69 is switched to return the hydraulic pressure in the hydraulic lifting cylinder 16 to the main transmission case 3, the left and right arms 21, the left and right connecting rods 20, and the relay link member 18 are caused by the ground load of the left and right wheels 5. Etc., the cylinder rod 17 is returned to the front, the left and right wheels 5 are moved up, and the aircraft is lowered with respect to the field.

  Further, if the ground load is different from the left and right wheels 5 by a predetermined amount due to the left and right inclination of the fuselage, the relay link member 18 rotates back and forth with the left and right ends of the bottom surface 17b of the notch groove 17a as a fulcrum. The left and right inclined postures of the airframe are corrected so that the wheels 18 on the side where the ground contact load is large are moved downward, the wheels 5 on the opposite side are moved upward, and the left and right horizontal postures are obtained. At this time, the connecting shaft 19 prevents the relay link member 18 from dropping from the notch groove 17a of the cylinder rod 17.

  Since the left and right ends of the bottom surface 17b of the notch groove 17a are displaced to the left and right with respect to the left and right connecting rods 20 and thus the left and right central positions between the left and right connecting portions 18b, the difference in grounding load between the left and right wheels 5 is different. When the relay link member 18 is small, the state in which the front surface 18d that is the contact surface of the relay link member 18 and the bottom surface 17b of the cutout groove 17a are in contact with each other without rotating forward and backward is maintained. Therefore, the left and right wheels 5 individually move up and down unnecessarily, thereby preventing the left and right tilt posture of the aircraft from becoming unstable.

Further, the bottom surface 17b of the notch groove 17a serving as the contact surface, the front surface 18d at the center of the right and left of the relay link member 18, the front surface of the front receiving plate 23, the front and rear surfaces of the spacer 101, and the rear portion 18b-2 of the connecting portion 18b. Since the rear surface and the front surface of the front portion 18b-1 and the rear surface of the restrictor 26 are flat, the relay link member 18 rotates and the front surface 18d at the center of the left and right of the relay link member 18 and the rear of the connecting portion 18b. The change in the angle of the rear surface of the side portion 18b-2 and the front surface of the front portion 18b-1 of the connecting portion 18b can be suppressed by the biasing force of the spring 22, and the horizontal inclination of the machine body approaches the horizontal inclination of the field. This prevents the aircraft from becoming unstable in the horizontal tilting posture.
Further, the restricting tool 26 of the connecting rod 20 prevents the wheel 5 from moving downward due to the driving reaction force of the wheel 5 rotating forward, so that the height of the fuselage to the ground and the right-and-left tilt posture are improper. .

  It should be noted that by adjusting the position of the double nut 25 in the connecting rod 20 by loosening the double nut 25, it is possible to adjust the left-right inclined posture of the aircraft. This adjustment may be performed by adjusting the positions of the left and right double nuts 25 or by adjusting the positions of both the left and right double nuts 25. Since the adjustment portion comprising the double nut 25 is located outside the bonnet cover 43 in plan view of the body, the operator can easily adjust the position of the double nut 25 from above without the bonnet cover 43 being in the way. Yes.

  FIG. 7 shows a rotation base of the traveling transmission case 4, and a rod-shaped restricting tool 165 laid horizontally on a mounting rod 168 extending from the main transmission case 3 is provided in the rotation range over the left and right arms 21 and 21. The wheels 5 are too low to come into contact with the left and right arms 21.

  On the front side of the control unit 9 and on the rear side of the seedling stage 11, a wheel 5, the seedling planting device 10, and a main clutch lever 36 that can cut off transmission to the seedling stage 11, the seedling planting device 10 and A planting lifting / lowering lever 37 for switching the oil passage of the hydraulic valve unit 69 so as to cut off the transmission to the seedling table 11 or to operate the hydraulic lifting / lowering cylinder 16 is provided. The main clutch lever 36 is configured to be operated in two operation positions, an on position and a disengagement position, and the main clutch in the main transmission case 3 is operated to switch between a transmission state and a non-transmission state.

  The planting lifting / lowering lever 37 is configured to be operated in four operation positions including a planting position, a descending position, a neutral position, and an ascending position, and operates a planting clutch in the main transmission case 3 to plant planting. The shaft 15 is switched between a driving state and a non-driving state, and the hydraulic elevating cylinder 16 is operated to move the left and right wheels 5 up and down.

  That is, when the planting elevating lever 37 is operated to the planting position, the planting clutch is set in the transmission state to operate the seedling planting device 10 and the seedling mounting table 11, and the left and right wheels 5 are subjected to ground load by the weight of the machine body. As a result, the hydraulic pressure in the hydraulic lift cylinder 16 is returned to the main transmission case 3 to move the left and right wheels 5 upward, and the fuselage is lowered to bring the float 12 into a grounded state. When operated to the lowered position, the planting clutch is brought into a non-transmission state in a state where the machine body is lowered as described above, and the operations of the seedling planting device 10 and the seedling mounting table 11 are stopped.

  When operated to the neutral position, the operation of the hydraulic lifting cylinder 16 is fixed by blocking the oil passage to the hydraulic lifting cylinder 16 in a state where the operations of the seedling planting device 10 and the seedling mount 11 are stopped as described above. Then, the right and left wheels 5 are fixed at arbitrary vertical positions, and the elevation of the aircraft is stopped. When operating to the raised position, with the operation of the seedling planting device 10 and the seedling mounting table 11 stopped as described above, hydraulic pressure is supplied into the hydraulic lifting cylinder 16 to move the left and right wheels 5 downward, The airframe is raised and the float 12 is not grounded.

  Further, the oil path of the hydraulic valve unit 69 is switched by a vertical movement of the center float 12a via a rod connected to the front part of the center float 12a. The hydraulic pressure is supplied into the elevating cylinder 16 to move the left and right wheels 5 downward.

  Therefore, when the planting elevating lever 37 is in the planting position and the lowered position, the left and right wheels 5 are moved so that the center float 12a comes into contact with the field scene and moves up and down to bring the center float 12a into a desired front-rear posture. It is configured to move up and down and to move up and down so that the airframe has a predetermined ground height.

  The specific configuration will be described with reference to FIG. 4. The hydraulic valve in the hydraulic valve unit 69 is a rotary valve, and is configured to switch the oil path by rotating the spool shaft 72 in the left-right direction. A hydraulic operating arm 73 that rotates integrally with the spool shaft 72 is provided on the right side of the hydraulic valve unit 69, and the oil path is moved upward, neutral, and lowered as the hydraulic operating arm 73 is rotated clockwise. Switches. A lifting operation wire 74 from the planting lifting lever 37 is connected to the hydraulic operation arm 73, and when the planting lifting lever 37 is operated, the hydraulic operation arm 73 is rotated via the lifting operation wire 74. It has become.

  On the right side of the hydraulic operation arm 73, there is provided a float vertical arm 75 that is rotatable around the spool shaft 72. The float vertical movement rod 76 is connected to the rear end portion of the float vertical movement arm 75 and the front portion of the center float 12a. It is connected with. On the other hand, the front end portion of the hydraulic operation arm 73 is bent to the right and is positioned below the front end portion of the float vertical movement arm 75.

  Therefore, regardless of the rotation position of the hydraulic operation arm 73, when the front part of the center float 12a moves upward, the float vertical movement arm 75 rotates counterclockwise via the float vertical movement rod 76, and the float vertical movement moves. The front end portion of the arm 75 pushes down the front end portion of the hydraulic operation arm 73, and the hydraulic operation arm 73 is rotated counterclockwise to switch to the raised state.

  Further, when the planting lift lever 37 is in the planting position or the lowered position, when the front part of the center float 12a moves downward, the float vertical movement arm 75 rotates clockwise via the float vertical movement rod 76, Since the front end portion of the float vertical movement arm 75 moves upward, the front end portion of the hydraulic operation arm 73 that has been pushed down in contact with the front end portion of the float vertical movement arm 75 also moves upward, causing the hydraulic operation arm 73 to move to the right. It is configured to rotate around and switch to a lowered state.

  The hydraulic operation arm 73 is pulled by a spring 77 (FIG. 5) in a direction to rotate clockwise. Further, since the hydraulic operation arm 73 is restricted by the lifting operation wire 74 when the planting lifting lever 37 is operated to the raised position, the hydraulic operation arm 73 cannot be rotated to the neutral state or the lowered state. Similarly, since the hydraulic operation arm 73 is restricted by the lifting operation wire 74 when the planting lifting lever 37 is operated to the neutral position, the hydraulic operation arm 73 cannot rotate in the lowered state.

  An automatic return rod 78 is connected to the upper end of the hydraulic operation arm 73. The end of the spring 77 is hooked on the automatic return rod 78. The other end of the automatic return rod 78 passes through a moving body 80 fixed to a collar 79 that moves back and forth together with the cylinder rod 17 and extends rearward to form a hook portion by a double nut 81 (FIG. 5). ing.

  Accordingly, when the hydraulic operation arm 73 is turned upward and the cylinder rod 17 is moved to the rear side, the double nut 81 is hooked on the moving body 80 and the automatic return rod 78 is pulled rearward. The operation arm 73 is forcibly turned to the neutral state, the movement of the cylinder rod 17 is stopped, and the ascending operation of the airframe is stopped. That is, when the cylinder rod 17 moves to the rear moving end in the moving stroke, the oil passage is automatically switched to the neutral state to prevent the drive load of the hydraulic pump from increasing.

  Note that the automatic return rod 78 is positioned above the relay link member 18 in a normal state. Therefore, the automatic return rod 78 stabilizes the operation timing of the hydraulic operation arm 73 with respect to the position of the cylinder rod 17, and the operation accuracy of the automatic return timing to the neutral state of the hydraulic operation arm 73 is improved.

  A shift lever 38 for operating the transmission unit in the main transmission case 3 and a recoil knob 39 for starting the engine 2 are provided on the front side of the control unit 9 and the seedling mount 11. The engine 2 and the recoil knob 39 at the front end of the airframe are connected by a recoil rope 40.

  A protective frame 51 that protects the engine 2, the main transmission case 3, the bonnet cover 43, and the like from obstacles in front of the aircraft is provided at the front of the aircraft. The protective frame 51 includes left and right attachment portions 51a extending from the left and right side surfaces of the main transmission case 3 to the left and right outer sides, and a protection portion 51b serving as an outer edge of the machine body connecting the left and right attachment portions 51a. The protection part 51b has a configuration in which the left and right central part extends in the horizontal direction and is positioned at the most front side, and the left and right outer parts are positioned at the rear side as going to the left and right sides.

  As described above, when the walking type rice transplanter 1 according to this embodiment switches the hydraulic valve unit 69 to supply the hydraulic pressure from the hydraulic pump into the hydraulic lifting cylinder 16, the cylinder rod 17 moves backward. Thus, the left and right connecting rods 20 are moved rearward via the relay link member 18, the left and right transmission cases 4 are rotated downward via the arms 21, and the left and right wheels 5 are moved downward.

  On the other hand, when the hydraulic valve unit 69 is switched to return the hydraulic pressure in the hydraulic lifting cylinder 16 to the main transmission case 3, the cylinder rod 17 moves forward so that the left and right connecting rods are connected via the relay link member 18. 20 is moved forward, the left and right transmission cases 4 are rotated upward via the arm 21, and the left and right wheels 5 are moved upward.

  A spacer 101 is inserted between the front receiving plate 23 and the rear portion 18b-2 of the connecting portion 18b. When the hydraulic valve unit 69 is switched (the hydraulic pressure in the hydraulic lifting cylinder 16 is changed to the main transmission case 3). When the spacer 101 is pulled out, the spring 22 is extended to push the connecting portion 18b, and the relay link member 18 moves forward. Furthermore, when the relay link member 18 hits the restricting tool 26, the left and right connecting rods 20 move forward, the left and right transmission cases 4 rotate upward via the arms 21, and the left and right wheels 5 move up.

  Therefore, the forward movement of the relay link member 18 is promoted by pulling out the spacer 101 from the lifted state of the left and right wheels 5 before pulling out the spacer 101 (referred to as the first lifted state). Rises (second rising state).

  On the other hand, since the airframe is lowered, the float 12 is in a grounded state. That is, when the spacer 101 is removed, the float 12 descends below the field scene during planting work. As a result, the problem that the load due to the weight of the fuselage is applied to the axle and the traveling transmission case 4 when the float 12 touches the floor when loading on a truck or the like can be solved.

  Even in the first ascending state, the float 12 is grounded on the farm scene but cannot be grounded on the floor of the truck bed. Since the left and right wheels 5 are moved upward by weakening the hydraulic pressure in the hydraulic lifting cylinder 16, if the expansion / contraction width of the hydraulic lifting cylinder 16 is set wide, the left and right transmission cases 4 when the hydraulic pressure is weakened. It is also conceivable that the rear end portion does not rise greatly and the float 12 is not grounded in a flat place. That is, the farm scene has some unevenness, and the float 12 is easily grounded even if the hydraulic pressure in the hydraulic lifting cylinder 16 does not return completely. However, the float 12 is on the floor of the truck bed during transportation or non-working. Hard to ground. In this case, the weight of the airframe is received only by the left and right wheels 5, and there is a problem that durability of the transmission case 4, the mounting stay of the transmission case 4, the axle, and the like is lowered.

  However, not only is the hydraulic pressure in the hydraulic lift cylinder 16 weakened, but the left and right wheels 5 can be raised by utilizing the tension of the spring 22 using the spacer 101. That is, the tension of the spring 22 when the spacer 101 is pulled out serves as an auxiliary force for returning the hydraulic pressure in the hydraulic lift cylinder 16 into the main transmission case 3.

  As shown in FIG. 1 and FIG. 7, the switching device 110 is connected to a support column 103 (fixed on both the left and right sides of the bonnet 43) fixed to the front frame 6 side and the support column 103. 103a, an operation lever 105 that can be rotated in the vertical direction, an upper end of the operation lever 105 connected to the operation lever 105 via a connecting member 106, a rod 107 that moves up and down by the operation lever 105, and a lower end of the rod 107. The spacer 101 is inserted between the receiving plate 23 on the front side and the relay link member 18, and the spacer 101 is pulled out in the direction of arrow A (upward) by the operation lever 105, so that the second is lifted from the first raised state. Can be switched to the rising state. As shown in FIG. 8, when the support 103 is provided with a notch 103 b in which the operation lever 105 can freely move, the operation lever 105 can be easily detached from the support 103. Moreover, the support | pillar 103 should just be fixed to the body side, and may be fixed to the fixed side of the cylinder 16. FIG.

  The operation lever 105 can be expanded and contracted back and forth in accordance with the movement of the relay link member 18 with the spacer 101 being sandwiched. For example, an elastic spring or the like is provided between the operation side and the distal end side (the connecting member 106 side). A configuration is conceivable in which a member can be sandwiched or a small-diameter lever shaft can be inserted into and withdrawn from a large-diameter lever shaft.

  Further, as shown in FIG. 8, the spacer 101 has a cutout portion 101a into which the connecting rod 20 can be inserted, and for example, the spacer 101 may have a U-shaped or U-shaped cross section. Further, when the spacer 101 is formed of an elastic body such as rubber, the pressing force of the spring 22 can be absorbed, so that the load applied to the traveling transmission case 4 and the vertical movement mechanism of the wheel 5 can be reduced.

  Therefore, according to this configuration, the float 12 can be reliably grounded and the weight of the airframe can be received by the float 12 and the left and right wheels 5, so that a load is prevented from being applied to the traveling transmission case 4 and durability is improved. . Even when the float 12 is in contact with the ground in the first ascending state, the left and right wheels 5 can be further lifted to ground the entire surface of the float 12. Accordingly, since the weight of the airframe can be received by the float 12 and the wheel 5 during transportation or non-working carried by a truck or the like, a load is prevented from being applied to the traveling transmission case 4 and durability is improved. On the other hand, during normal work, the hydraulic pressure can be set simply by increasing the hydraulic pressure by switching the hydraulic valve unit 69, supplying the hydraulic pressure from the hydraulic pump to the hydraulic lift cylinder 16, and inserting the spacer 101.

  By simply removing the spacer 101 in this manner, the configuration in which the front / rear expansion / contraction width of the lifting / lowering actuator 16 is changed, that is, the configuration in which the left and right connecting rods 20 can slide back and forth is simplified. Since the switching device 110 that switches between the state in which the traveling transmission case 4 moves up and the state in which it does not move up can be configured, the configuration of the rice transplanter is simplified.

  Further, by providing the switching devices 110 on the left and right, the spacer 101 can be inserted and removed separately on the left and right. For example, since only one of the left and right sides may be used in a place that is not horizontal, various uses are possible depending on the situation.

In FIG. 9, the whole top view of the walk type rice transplanter of other embodiment of this invention is shown. FIG. 10 shows a simplified side view (FIG. 10A) and simplified rear views (FIGS. 10B to 10D) near the left steering handle 9a.
FIG. 11 shows a simplified rear view near the drawing marker 120.

  In the rice transplanter of this embodiment, the drawing marker 120 which forms the mark used as the standard of driving | running | working in the adjacent work position is arrange | positioned at the both right and left sides of the planting part U. FIG. The drawing marker 120 is switched between a use state in which it is inverted by a marker operation lever 122 provided on the left and right outer sides of the left and right control handles 9a and the side clutch lever 41 and a non-use state in which it is erected (also referred to as a storage state). .

  The marker operating lever 122 is formed in an arc shape centering on the grip head portion of the steering handle 9a in rear view, and is fixed to a connecting member 133 that is rotatably connected to a mounting piece 130 that protrudes to the left and right outside of the steering handle 9a. ing. The marker operating lever 122 rotates in the vertical direction with the connecting portion 135 between the attachment piece 130 and the connecting member 133 as a fulcrum. Further, the connecting portion 135 is provided with a torque spring 137, and the marker operating lever 122 is urged upward by the torque spring 137.

  The marker operating lever 122 and the drawing marker 120 are connected by a marker connecting rod 124 and a support member 126. As shown in the rear views of FIGS. 10 and 11, one end 124 a of the marker connecting rod 124 is rotatably connected to the lower side of the grip 122 a of the marker operating lever 122, and the other end of the marker connecting rod 124. Reference numeral 124b is rotatably connected to an end portion of a support member 126 that supports the base portion of the drawing marker 120. The support member 126 has a rotation fulcrum 126a on the base side, and a marker connecting rod 124 is connected to the tip side. The base of the drawing marker 120 is fixed to the support member 126, and when the support member 126 rotates, the drawing marker 120 rotates together with the support member 126. Therefore, when the marker operating lever 122 is operated, the drawing marker 120 is switched between the use state and the non-use state by the connecting mechanism such as the marker connecting rod 124 and the support member 126.

  That is, when the marker operating lever 122 is operated from the state of FIG. 10B to the side clutch lever 41 side (arrow B direction, downward direction), the marker connecting rod 124 is lowered and the support member 126 is moved in the arrow C direction (FIG. 11). Rotating to (a)), the drawing marker 120 is switched from the non-use state to the use state, and the state becomes as shown in FIG. 10 (c) and FIG. 11 (b).

  Conventionally, it is operated in a non-use state and a use state by pulling or returning a wire provided at a rotation fulcrum portion of the drawing marker. In this case, if the wire malfunctions due to rust or deterioration, the operability is lowered.

  However, since the drawing marker 120 is configured to be operable with the marker operating lever 122 via the marker connecting rod 124 in this way, there is less failure and improved durability compared to a wire that is prone to malfunction due to rust and deterioration. To do. Therefore, the drawing marker 120 can be reliably operated, and the operability and work efficiency are improved. Moreover, since the structure is simple as described above, the cost required for the drawing marker 120 is reduced.

  When the notch 122a is formed in the lower part of the marker operating lever 122 and the marker operating lever 122 is operated to be used, the notch 122a is hooked on the lower part of the side clutch lever 41 and the marker operating lever 122 is fixed.

  Since the marker operating lever 122 is configured to be hooked to the side clutch lever 41, the raising or lowering of the drawing marker 120 can be interlocked with the operation of the side clutch lever 41, so that the operation amount of the drawing marker 120 is reduced. Work efficiency and operability are improved.

  Furthermore, it is preferable to provide a protrusion 122b that protrudes from the notch 122a and is rotatable to the inside and the outside of the notch 122a and biased outwardly on the inner side in the left-right direction of the notch 122a. The protrusion 122b is urged by a torque spring 138 provided at the center of rotation.

  As shown in FIG. 10D, when the marker operating lever 122 is operated, the protrusion 122b hits the lower part of the side clutch lever 41, rotates inside the notch 122a (arrow D direction), and retracts. As the protrusion 122b rotates inward, the lower portion 41 of the side clutch lever enters the notch 122a. Thereafter, the protrusion 122b is rotated to the outside of the notch 122a by the torque spring 138 and hooked to the lower portion of the side clutch lever 41, and the marker operating lever 122 is fixed. Since the protrusion 122b serves as a stopper when the lower portion of the marker operation lever 122 is hooked on the side clutch lever 41, the marker operation lever 122 is securely fixed, and the marker operation lever 122 is detached during the operation to draw the drawing marker 120. Can be prevented from lifting. Therefore, a mark by the drawing marker 120 is reliably formed on the field, and straightness and work efficiency are improved.

  When the protrusion 122b contacts the lower portion of the side clutch lever 41, the protrusion 122b is retracted into the notch 122a, so that the protrusion 122b is not obstructed and the side clutch lever is not attached to the notch 122a of the marker operation lever 122. 41 can be inserted, and the marker operation lever 122 can be hooked on the side clutch lever 41 as it is, so that the number of operation steps can be reduced and the operability is improved.

  The side clutch is disengaged when the side clutch lever 41 is gripped and operated in the direction of arrow E (upward) when the aircraft is turning. At this time, the marker operation lever 122 is disengaged from the side clutch lever 41 and is applied by the biasing force of the torque spring 137. Returning to the non-use state (the state of FIG. 10B).

  With this configuration, when the drawing marker 120 is used, the marker operating lever 122 can be fixed and maintained in use by a simple operation of operating the marker operating lever 122 downward and hooking the side clutch lever 41. When storing, by operating the side clutch lever 41, the marker operation lever 122 can be easily detached from the side clutch lever 41 to be in a non-use state. Therefore, the operability of the drawing marker 120 is improved and the burden on the operator is reduced.

12 and 13 show an overall side view of a walking type rice transplanter according to another embodiment of FIG. FIG. 14 is an enlarged view of the arm structure K portion of FIGS. 12 and 13.
In the rice transplanter of the present embodiment, when the walking type rice transplanter 1 is stored after the work is finished, a storage stand is attached to the front part of the machine body, and the front part of the machine body is erected downward and the rear part is directed upward ( The longitudinal direction of the aircraft is the vertical direction).

  Conventionally, in order to attach this storage stand, it was necessary to remove the bumper (protective frame) at the front of the aircraft, which caused problems such as taking time to put it in the storage state and increasing the burden on the operator. .

  Therefore, it is provided on the left and right of the front part of the bonnet cover 43, has a bent part at the front and rear center part, the rear part 140a is fixed to the bonnet cover 43, and the front part 140b rotates vertically with the bent part as a fulcrum. Left and right first arms 140 and left and right first arms 140 provided on the upper side of the left and right first arms 140, the front portion is connected to the front end portions of the left and right first arms 140, and the rear portion is fixed to the hood cover 43. The second arm 142, the left and right first arms 140, and the left and right second arms 142 are connected to each other, respectively, so that one end can turn to the first arm 140 and the other end can turn to the second arm 142. The foldable third arm 145 to be connected and the pivot point of the first arm 140 are provided, and the front portions 140b of the left and right first arms 140 are fixed when the third arm 145 is folded. Attaching the arm structure K with a pin (supporting portion) 146 for supporting.

  Further, a first bumper 147 extending in the horizontal direction is connected to a connecting portion between the left and right first arms 140 and the third arm 145, and similarly, a connecting portion between the left and right second arms 142 and the third arm 145 is connected to the connecting portion. A second bumper 148 extending in the horizontal direction is connected.

FIG. 12 shows the state of the arm structure K when the rice transplanter 1 is working, and FIG. 13 shows the state of the arm structure K when the rice transplanter 1 is stored.
When the rice transplanter 1 is operated, the third arm 145 is folded and the arm structure K is used as an obstacle protection body. The third arm 145 has a first arm side third arm 145a connected to the tip of the first arm 140 and a second arm side third arm 145b connected to the tip of the second arm 142 so as to be rotatable. And it is the structure bent at this connection part 145c.

  The first arm 140 is connected to the bonnet 43 via the plate 147, and the front pin 140 b of the first arm 140 is fixed by inserting a stopper pin 146 into a pin hole provided in the plate 147.

  When the rice transplanter 1 is stored, the stopper pin 146 is removed to release the support of the front portion 140b of the first arm 140, and the third arm 145 expands in a straight line state when rotated in the direction of arrow F (downward) ( In a straight line in the vertical direction). At this time, the connecting portion 145c is fixed so as not to be bent. By connecting pin holes 145d and 145e provided in the first arm side third arm 145a and the second arm side third arm 145b respectively and inserting a lock pin (not shown), the connecting portion 145c is fixed.

  Therefore, while the rice transplanter 1 is working, the third arm 145 can be folded and the arm structure K can be used as an obstacle protector. On the other hand, when the rice transplanter 1 is stored, the front portion 140b of the first arm 140 is rotated downward. At the same time, the third arm 145 for the stand is extended, and the arm structure K can be used as a stand when the front portion of the rice transplanter 1 is set downward and the rear portion is set upward.

  Thus, by providing the arm structure K that can be used as a protective body, the vehicle body can be reliably protected when the rice transplanter 1 contacts an obstacle or the like, so that the rice transplanter 1 is damaged. Difficult to improve durability. Moreover, since this arm structure K can be used also as a stand at the time of accommodation of the rice transplanter 1, since the rice transplanter 1 can be made into an accommodation state, without removing an arm structure, the time which work requires is reduced. . Similarly, when the rice transplanter 1 is changed from the housed state to the used state, it can be easily changed by attaching and detaching the pins, so that the time required for the work is reduced and the burden on the operator is also reduced.

  Moreover, Fig.15 (a) shows the side view of a seedling planting apparatus, and FIG.15 (b) shows the figure of the scraper of Fig.15 (a). Further, FIG. 16 (a) shows a side view of a seedling planting apparatus of an example different from FIG. 15, and FIG. 16 (b) shows a diagram of the scraper of FIG. 16 (a). The seedling planting apparatus 10 shown in these drawings may be provided in any rice transplanter of the above-described embodiment.

  The seedling planting device 10 has a rotary shaft 150 at the center, and is configured by a rotary case (rotary body) 152 that is driven to rotate and a planting basket 154 that is attached to both ends of the rotary case 152 to plant seedlings. . The planting rod 154 scrapes and plantes the seedlings supplied from the seedling mount 11 to the seedling outlet 28 one by one while rotating around the rotation shaft 150 as a fulcrum.

  Since the planting basket 154 penetrates into the soil when seedlings are planted, mud soil may remain on the planting basket 154 depending on the soil quality of the field. Further, when the seedling is scraped off from the seedling mat placed on the seedling stand 11, it also contacts with the soil of the seedling mat (cultured soil of the seedling). May remain. The adhering mud easily accumulates around the seedling collection port 28 through which the planting basket 154 takes a seedling, and may block the seedling collection port 28 when the working time becomes long.

If this mud becomes an amount that interferes with the rotation trajectory of the planting basket 154, the planting basket 154 rotates without taking the seedling, and a position where the seedling cannot be planted arises, and the operator must replant the seedling manually. In other words, there is a problem that the labor of the worker increases.
Moreover, when taking seedlings, mud soil rubs against the seedlings, and there is a problem that the seedlings are damaged and growth failure may occur.

  Therefore, as shown in FIG. 15 and FIG. 16, a scraper that rotates with the planting cage 154 along the rotation of the rotary case 152 and removes mud adhering to the planting outlet 28 after receiving seedlings by the planting cage 154. 155 may be provided.

  The scraper 155 is arranged in the vicinity of the implantation cage 154 and behind the implantation cage 154 with respect to the rotation direction of the rotary case 152, and the base of the scraper arm 155b that supports the main body 155a of the scraper 155 is provided. It is fixed to the rotary case 152 by the mounting shaft 157. The planting basket 154 and the scraper 155 rotate together with the rotary case 152, and the scraper 155 rotates along the locus of the planting basket 154, so that the planting basket 154 receives the seedling and then enters the seedling inlet 28. The mud adhered to the surroundings of the seedling outlet 28 is dropped.

  With this configuration, it is possible to prevent mud from adhering to the periphery of the seedling outlet 28, and problems such as failure to remove the seedling by the planting ridge 154 and withering during the growth due to damage to the seedling by the mud soil also occur. Absent. Therefore, seedling planting accuracy is improved and seedling growth is improved.

  Further, if the attachment shaft 157 is removed, the attachment angle of the scraper 155 with respect to the longitudinal direction of the rotary case 152 can be changed to a desired angle, so that the scraper 155 can be attached at an appropriate position.

  Further, the planting ridge 154 is configured to plant seedlings while swinging back and forth with the pivot shaft 159 as a fulcrum, but the scraper 155 is also planted as a pivot shaft without using the mounting shaft 157 of the scraper 155 as a fixed shaft. The scraper 155 can be swung at an appropriate angle if it is configured to swing back and forth similarly to the insert rod 154. Since the mud soil adhering to the scraper 155 can be removed by swinging the scraper 155, the mud adhering to the scraper 155 does not adhere again to the periphery of the seedling outlet 28, and mud removal can be performed reliably. .

  Then, when the scraper 155 is pulled out after being caught by the seedling outlet 28, the planting trajectory may change temporarily due to the resistance. It is possible to prevent breakage and change of planting trajectory.

  FIG. 15B and FIG. 16B show specific examples of the scraper 155. As shown in FIG. 15B, the scraper 155 rotates along the longitudinal center line of the scraper arm 155b that supports the scraper 155. One end of the shaft 158 is inserted, and a brush 160 that rotates freely may be attached to the outer periphery of the other end of the rotating shaft 158 (a portion protruding from the scraper arm 155b).

  In the case of the scraper 155 with restricted freedom of movement, when the scraper 155 comes into contact with something, the rotation of the rotary case 152 is stopped or the seedling inlet 28 or the front plate of the seedling outlet 28 is damaged. It is also possible that

However, if the scraper body 155a is a free-rotating brush 160, even if the scraper 155 comes into contact with something, the brush 160 reduces the impact and free-runs easily because the brush 160 rotates. Stoppage is not caused, and the seedling outlet 28 and the front plate of the seedling outlet 28 are not damaged. Moreover, since the mud adhering to the seedling outlet 28 can be scraped off with the brush 160, mud removal can be performed reliably.
Further, if the brush 160 can be replaced, it is not necessary to replace the entire scraper 155, thereby reducing the cost.

  Also, as shown in FIG. 16B, a plurality of free-rotating rollers 163 are mounted on the outer periphery of the rotating shaft 158 along the longitudinal direction of the rotating shaft 158, and a buffer material (elasticity such as rubber) is mounted on the outer periphery of the roller 163. A cushion material 167 such as a body or sponge may be attached.

  Also in this case, even if the scraper 155 comes into contact with something, the shock is alleviated by the buffer material 167, and the seedling outlet 28, the front plate of the seedling outlet 28, and the like are not damaged. Further, the roller 163 can be prevented from being damaged.

  And since the mud adhering to the seedling outlet 28 can be scraped off by rotation of the roller 163, mud removal can be performed reliably. Further, if the cushioning material 167 can be replaced, it is not necessary to replace the entire scraper 155 and the cost is reduced.

  The present invention is not limited to a walking type seedling transplanter equipped with a seedling planting unit, but can also be used for a riding type seedling transplanter.

DESCRIPTION OF SYMBOLS 1 Walking type rice transplanter 2 Engine 3 Main transmission case 4 Traveling transmission case 5 Wheel 6 Front frame 7 Planting transmission case 8 Rear frame 9 Control part 10 Seedling planting device 11 Seedling mount 12 Float 13 Rotating fulcrum shaft 14 Axle DESCRIPTION OF SYMBOLS 15 Planting transmission shaft 16 Hydraulic raising / lowering cylinder 17 Cylinder rod 18 Relay link member 19 Connection shaft 20 Connection rod 21 Arm 22 Spring 23 Front side receiving plate 24 Rear side receiving plate 25 Double nut 26 Restriction tool 27 Seedling receiving plate 28 Seedling receiving port 29 Left and right moving shaft 30 Connecting member 33 Support roller 34 Rail 35 Seedling feed belt 36 Main clutch lever 37 Planting lift lever 38 Shift lever 39 Recoil knob 40 Recoil rope 41 Side clutch lever 43 Bonnet cover
44 Fuel tank 45 Preliminary seedling stage 46 Support frame 47, 48 Rising portion 60, 61 Flange 62 Bolt 63 Nut 64, 65, 66 Rib 67 Bolt 68 Recess 69 Hydraulic valve unit 72 Spool shaft 73 Hydraulic operation arm 74 Lifting operation wire 75 Float vertical arm 76 Float vertical rod 77 Spring 78 Automatic return rod 79 Collar 80 Moving body 81 Double nut 101 Spacer 103 Post 105 Operation lever 106 Connecting member 107 Rod 110 Switching device 120 Drawing marker 122 Marker operating lever 124 Marker connection Rod 126 Support member 130 Mounting piece 133 Connecting member 135 Connecting portion 137, 138 Torque spring 140 First arm 142 Second arm 145 Third arm 150 Rotating shaft 152 Rotor Case 154 Uekomi杆 155 scraper 157 mounting shaft 159 rotation axis 158 rotates shaft 160 brush 163 roller 165 restricting mechanism 167 cushioning member 168 mounting rod 171 oil filler plug S vehicle body portion U planting section K arm structure

Claims (5)

The engine (2), the left and right wheels (5), and the left and right wheels (5) are supported on the rear end portions and the driving force from the engine (2) is transmitted to the left and right wheels (5). A traveling transmission case (4), a vehicle body frame (6) provided between the left and right traveling transmission cases (4), and a planting unit (U) provided behind the vehicle body frame (6) for planting seedlings in a farm field A steering part (9) provided behind the planting part (U) for steering the left and right wheels (5), and the traveling transmission case (4) with the front end of the traveling transmission case (4) as a fulcrum. An elevating actuator (16) for rotating in the vertical direction and moving the left and right wheels (5) up and down, and a float (12) for leveling the farm scene provided below the vehicle body frame (6) are provided. In a walking type seedling transplanter,
From the first lifted state in which the travel transmission case (4) and the left and right wheels (5) are lifted by the lift actuator (16), the travel transmission case (4) and the left and right wheels (5) are further lifted. A walking-type seedling transplanter characterized in that a switching device (110) that can be switched to an elevated state is provided. The elevating actuator (16) is a cylinder provided above the vehicle body frame (6), and the left and right central parts are connected to the cylinder rod (17) of the cylinder in the forward direction of the left and right wheels (5). The relay link member (18) that moves back and forth following the back-and-forth movement of (17), and the rear part penetrates the left and right ends of the relay link member (18), and the front part is the front end part of each of the left and right traveling transmission cases (4). The left and right connecting rods (20) connected to the pivot fulcrum, the spring (22) provided around the right and left connecting rods (20) behind the penetrating portion of the relay link member (18), and the spring (22) Receiving plates (23, 24) respectively attached to the front and rear ends of the frame, a restricting tool (26) fixed to the left and right connecting rods (20) in front of the through-hole of the relay link member (18), and a spring (2 ) And a fixing tool (25) fixed to the left and right connecting rods (20), and the cylinder rod (17) moves backward and forward so that the relay link member (18) and the left and right connecting rods (20) ) And left and right traveling transmission cases (4) through which the left and right wheels (5) move up and down,
The switching device (110) is connected to a support post (103) fixed to the vehicle body frame (6) side and the support post (103), and an operation lever (rotating up and down with the connection portion as a fulcrum). 105), the upper end of which is connected to the operating lever (105), the rod (107) which moves up and down by the operating lever (105), and the lower end of the rod (107). A spacer (101) that enters between the receiving plate (23) on the front side and the relay link member (18) in the forward direction, and the operation lever from the raised state of the left and right wheels (5) by the vertical movement mechanism The spring (22) is extended by pulling out the spacer (101) by (105), and the front receiving plate (23) moves the relay link member (18) forward so that the left and right connecting rods (20) and The walking according to claim 1, characterized in that the left and right wheels (5) can be switched from a first ascending state to a second ascending state by the up-and-down movement mechanism via a traveling transmission case (4). Mold seedling transplanter. In the forward direction of the left and right wheels (5), on both the left and right sides of the planting part (U), there are provided drawing markers (120) that form marks serving as guidelines for traveling at adjacent work positions,
Left and right steering handles (9a) for steering the left and right wheels (5) to the steering section (9), and transmission of power to the left and right transmission cases (4) below the left and right steering handles (9a) The left and right side marker levers (41) for operating the side clutch for turning on and off, the left and right steering handles (9a), and the left and right side clutch levers (41) on the left and right sides of the left and right drawing markers (120) are inverted. Left and right marker operating levers (122) for switching between the used state and the standing non-use state,
Left and right connecting mechanisms (124, 126) for connecting the left and right marker operating levers (122) and the left and right drawing markers (120), respectively, are provided,
The cutout portion (122a) that is hooked to the lower portion of the side clutch lever (41) when the marker operation lever (122) is operated to be used is formed in the lower portion of the marker operation lever (122). Item 3. A walking seedling transplanter according to Item 2.   Projecting from the notch (122a) inside the notch (122a) inside the notch (122a) inside the notch (122a) of the marker operating lever (122) in the forward direction of the left and right wheels (5), When a protrusion (122b) that is rotatable outward and biased outward is provided, and the marker operating lever (122) is operated in a use state, the protrusion (122a) is located below the side clutch lever (41). When the lower part of the side clutch lever (41) enters the notch (122a), the protrusion (122b) rotates outwardly of the notch (122a). The walking seedling transplanter according to claim 3, wherein the walking seedling transplanter is configured to be moved and hooked to a lower portion of the side clutch lever (41). Provided on the left and right of the front part of the vehicle body frame (6), has a bent part at the front and rear center part, the rear part (140a) is fixed to the vehicle body frame (6) side, and the front part (140b) has the bent part as a fulcrum. The left and right first arms (140) that are rotatable in the vertical direction and the upper sides of the left and right first arms (140) are connected to the front ends of the left and right first arms (140), Left and right second arms (142) whose rear portions are fixed to the body frame (6) side, and left and right first arms (140) and left and right second arms (142) are respectively connected to the connecting portions. The first arm (140) is provided at a pivotable fulcrum of the first arm (140), a foldable third arm (145) whose other end is rotatably connected to the second arm (142), When the third arm (145) is folded Comprising a support unit for fixing and supporting the front (140b) and (146) of the left and right first arm (140),
When working on the seedling transplanter, fold the left and right third arms (145) and use them as obstacle protection,
When the seedling transplanter is stored, the support by the left and right support parts (146) is released, the front part (140b) of the first arm (140) is rotated downward, and the left and right third arms (145) are moved vertically. The arm structure (K) that can be used as a stand when the front part of the seedling transplanting machine is extended downward and the rear part is raised upward is provided. The walking seedling transplanter according to item 1.

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