JP2010119369A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foldable seedling transplanter for multiple planting which is capable of surely fixing an unfolded planting device by a stable operation attitude. <P>SOLUTION: The seedling transplanter is mounted with a plurality of planting devices parallel to a machine body and includes a common main shaft 70 for planting, constructed so that the planting devices on the outside end can be folded together with the main shaft 70 for planting, and provided with a lock arm 221 in which a regulation unit 221a is formed for fixing the foldable outside section of the main planting shaft 70 transmitting to the planting devices on the outside end, wherein the lock arm 221 has a pivotally supporting unit so that the regulation unit 221a is rockable in a range A from the fixed position to a released position, and the regulation unit 221a and the pivotally supporting unit are separately disposed on the upper and lower front side of the main planting shaft 70. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a seedling transplanting machine for folding multi-row planting in which planting units including a seedling supply tank and a planting mechanism are mounted in parallel and the planting unit at the outer end is configured to be foldable.

  A seedling transplanting machine is known in which planting units including a seedling supply tank and a planting mechanism are mounted in parallel, and the planting unit at the outer end can be folded. For example, in Patent Document 1, a planting unit with a rear-falling seedling supply tank and a planting mechanism that receives seedlings behind the lower end is mounted in parallel with a travelable body, and at the lower end of the seedling tank. A common planting spindle is provided, and the planting unit at the outer end is configured to be foldable together with the planting spindle, so that the body width can be reduced and compactly stored.

In addition, a lock arm is provided with a restricting portion for fixing the folding portion of the planting main shaft in the unfolded support state, and this lock arm is pivotally supported so that the range from the fixing to the release of the restricting portion can swing. By doing so, the planting unit at the outer end can be unfolded and fixed and operated by operating the lock arm.
JP-A-10-295128

  However, the lock arm is disposed below the seedling supply tank and the planting mechanism because it needs to be close to the planting spindle, and also requires a large operating force to securely fix the deployed planting unit. There was a problem that the worker was forced to perform unstable work for operating the lock arm at a low position.

  The problem to be solved is to provide a foldable multi-row seedling transplanting machine that can securely fix the deployed planting device with a stable operation posture.

  According to the first aspect of the present invention, a planting device for taking out and planting the seedling behind the lower end of the seedling mounting portion inclined downwardly is mounted in parallel with the body corresponding to the planting strip, and these side by side planting A seedling transplanting machine comprising a planting main shaft that is commonly transmitted to the planting device in the vicinity of the front end thereof and capable of folding the planting device at the outer end together with the planting main shaft so that the planting is transmitted to the planting device at the outer end. A lock arm is provided with a restricting portion for fixing the foldable outer portion of the attached main shaft to the unfolding support position, and this lock arm is pivotable so that the range from the fixing position to the release position can be swung. It is provided with a supporting shaft supporting portion, and in a fixed position, the restricting portion and the supporting shaft portion are arranged so as to be vertically distributed on the front side of the planting main shaft. The said lock arm is arrange | positioned facing the open space of the front side of a planting main axis | shaft under the seedling mounting part.

  According to a second aspect of the present invention, in the configuration of the first aspect, the lock arm is provided with a gripping part for swinging operation which is bent so as to protrude from the restricting part to the front side of the machine body at a fixed position. To do. In the lock arm, an operating force is efficiently applied to the restricting portion via a grip portion close to the restricting portion.

  In the seedling transplanting machine according to the first aspect, since the lock arm faces the open space on the front side of the planting main shaft, the operator can swing the lock arm to the fixed position without difficulty.

  In addition to the effect of the first aspect, the seedling transplanting machine according to claim 2 can efficiently apply an operating force to the restricting portion via the grip portion close to the restricting portion of the lock arm. Can be easily operated.

Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings.
FIG.1 and FIG.2 represents the seedling transplanter which is the rice transplanter which is an example of application of this invention. In this seedling transplanting machine 1, a 10-plant seedling planting part 4 is mounted on the rear side of the vehicle body 2 via a lifting link device 3 so as to be movable up and down, and a fertilizer 5 is provided on the rear upper side of the vehicle body 2. .

  The vehicle body 2, which is a four-wheel drive vehicle, has a transmission case 10 disposed at the front of the fuselage, and the front wheels 14 and 14 are attached to the front wheel final cases 13 and 13 provided on the left and right sides of the transmission case. The front end of the main frame 15 is fixed to the back surface of the main frame 15 and the main rear wheels 20 and 20 and the auxiliary inner rear wheels 21 and 21 Auxiliary outer rear wheels 22 and 22 are attached.

  The engine 25 is mounted on the main frame 15, and the rotational power of the engine is transmitted to the transmission case 10 by the first belt transmission device and the second belt transmission device. The rotational power transmitted to the mission case 10 is shifted by a transmission in the case, and then separated into traveling power and work power. The traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 14 and 14, and is also transmitted to the rear wheel gear cases 19 and 19 to drive the rear wheels 20 and 20. The work power is transmitted to the planting clutch case provided at the right rear portion of the vehicle body 2 through the work transmission shaft, and then transmitted to the seedling planting unit 4 through the planting transmission shaft, and the fertilizer is applied by the fertilization transmission mechanism. 5

  An upper portion of the engine 25 is covered with an engine cover 30, and a control seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 33 for steering the front wheels 14 and 14 is provided above the front cover 32. The left and right sides of the lower end of the engine cover 30 and the front cover 32 are main steps 35 on which people can move. In addition, expansion steps 36 and 36 at substantially the same level as the main step 35 are provided on the rear left and right outside of the main step 35. In addition, lift legs 37 and 37 are provided below and outside the expansion steps 36 and 36. Further, on the rear side of the main step 35 and the expansion steps 36, 36, a rear step and an auxiliary rear step having the same level as the rear height of these steps are provided. The auxiliary rear step can be folded inward for storage.

  The elevating link device 3 has an upper link 51 and lower links 52, 52 rotatably attached to a link base frame 50 fixed to the rear end portion of the main frame 15, and a vertical link 53 is connected to the rear end portions of these links. ing. A rolling shaft provided on the seedling planting portion side is rotatably inserted and connected to a bearing portion projecting rearward from the lower end portion of the vertical link 53, and the seedling planting portion 4 is mounted so as to be able to roll around the rolling shaft. Has been. When the elevating hydraulic cylinder 56 provided between the main frame 15 and the swing arm 57 integrated with the upper link 51 is expanded and contracted, the upper link 51 and the lower links 52 and 52 rotate up and down, and the seedling planting unit 4 Move up and down in a nearly constant posture.

  The seedling planting unit 4 includes a transmission case 60 that also serves as a frame, a seedling placement unit 80 that places the seedlings and reciprocates left and right to supply seedlings to a predetermined seedling outlet, and seedlings supplied to the seedling outlet. A planting apparatus 200 for planting in a farm field, a float 210 for leveling the mud surface prior to seedling planting, and the like are provided. In order to reduce the left and right width during storage, each part of the seedling planting part 4 including the seedling mounting part 80 is configured such that its outer part is folded inward.

  The transmission case 60 has a central arrangement, that is, a front end portion of the third unit transmission portion 62-3 from the left side fixed to the rear surface of the seedling placement portion drive case 61 located in the left and right center portion. The inner end portions of the first connection pipes 63 and 63 are fixed to the side surfaces, and the front inner surfaces of the unit transmission portions 62-2 and 62-4 are fixed to the outer end portions of the first connection pipes 63 and 63. The inner ends of the second connection pipes 64, 64 are fixed to the front outer surfaces of the transmission parts 62-2, 62-4, and the unit transmission parts 62-1, 62 are attached to the outer ends of the second connection pipes 64, 64. The front inner surface of -5 is fixed. The seedling mounting part 80 is supported on the upper side of the transmission case 60, and the left and right protruding parts of the planting drive shafts 65,... Supported on the rear parts of the unit transmission parts 62-1 to 62-5 are each 1 from the left side. The tenth planting device 200-1 to the tenth planting device 200-10 are attached.

  The seedling planting part driving power transmitted from the transmission case 10 of the vehicle body 2 is transmitted to the input part of the transmission case 60. The rotational power is planted in the center portion that passes through the lower portion of the seedling mounting portion drive case 61 and is supported by the front portions of the unit transmission portions 62-2 to 62-4 and the first connection pipes 63, 63. Further, the unit transmission section 62-is transmitted to the shaft 69 through a chain 72 that can be turned on and off with the planting shaft 69 by the second hook clutch 71-2 to the fourth hook clutch 71-4 from the left side. It is transmitted to each planting drive shaft 65,. Further, the rotational power of the planting shaft 69 is applied to the inside of the second connection pipes 64 and 64 and the front part of the unit transmission parts 62-1 and 62-5 by the hook clutches 71-1 and 71-5 at both outer side positions. It is transmitted to the planting main shafts 70, 70 on the supported side so that transmission can be turned on and off, and the unit transmission units 62-1, 62-5 are planted from the planting main shafts 70, 70 via the chains 72, 72. It is transmitted to the attached drive shafts 65, 65.

  Further, the rotation of the planting shaft 69 is transmitted to a seedling vertical feed drive shaft 73 that drives the seedling vertical feed device 101, which will be described later, and a laterally moving rod 74 that moves the seedling mounting portion 80 left and right.

  Since the hook clutches 71 are individually turned on and off, the planting strips PL1 to PL10 can be switched between planting and non-planting in units of two strips. The outer side two stripes, that is, the first and fifth hook clutches 71-1 and 71-5 from the left side, are provided on the vehicle body 2, and the center six hook clutch 71 The hook clutch levers 75-2 to 75-4 for operating -2 to 71-4 are provided in the seedling planting portion 4, and the operation levers 77 and the clutch pins 76,. Tied.

  The seedling mounting part 80 is provided so as to be inclined so that the front side is higher, and the first seedling mounting part 80-1 to the 10th seedling mounting from the left side for each seedling planting line by the partition walls 81,. Section 80-10. The seedling mounting part 80 is supported on the back side of the seedling mounting surface so as to be movable left and right. The support structure is such that the engagement sliding contact members 84,... Are fixed to a horizontal frame 82 provided in the left-right direction at the lower part of the rear surface side of the seedling mounting surface (shown in FIG. 5). A seedling support frame which is engaged with a seedling receiving plate 83 which is long on the left and right and which is slidable to the left and right, and whose base is supported by the unit transmission parts 62-2 and 62-4. .. Are engaged with an upper rail 87 having a U-shaped cross-section in the left-right direction fixed to the upper part of the back surface of the seedling mounting surface. The connecting members 74a and 74a attached to both ends of the lateral movement bar 74 are connected to attachment members 88 and 88 fixed to the lateral frame 82 (shown in FIG. 9), and the lateral movement bar 74 reciprocates left and right. Thus, the seedling mounting portion 80 also reciprocates left and right along the seedling receiving plate 83. In addition, the extended seedling mounting part 89, ... is attached to the upper end part of each seedling mounting surface so that rotation to the seedling mounting surface side is possible.

  As shown in FIG. 5, the seedling receiving plate 83 has an L-shaped cross section for receiving a base portion 83a having a rectangular cross section with which the engaging sliding contact members 84,... Engage and a lower end surface of the seedling on the seedling mounting portion. The body portion 83b is integrally molded, and seedling openings 90,..., Which are notched in a U shape, are formed at 10 locations corresponding to each seedling mounting portion 80. As the seedling mounting part 80 reciprocates left and right, seedlings positioned at the lower end of each seedling mounting part 80 are sequentially supplied to the seedling outlets 90,. The postscript insertion tool 202 of the planting apparatus 200 passes through the seedling inlet 90, and the seedlings are divided into one stock and taken out. Further, as shown in FIG. 6, rubber seedling guides 91, 91 are attached to the left and right sides of the edge of the seedling outlet 90, and the tip locus of the stock insert 202 on the front side of the edge of the seedling outlet 90. A back guide 92 made of a metal wire formed in a shape along the line is attached.

  The structure of the support part of the seedling receiving plate 83 is as follows (see FIG. 5). In other words, the seedling plate vertical movement guide plates 95,... Are attached to the brackets 94,... Fixed to the unit transmission parts 62, and the seedling receiving plate mounting members 96,. Further, a seedling receiving plate 83 is attached to the attachment members 96. Also, a left and right seedling amount adjusting shaft 97 is rotatably fitted to the brackets 94,..., And the tip of the seedling receiving plate vertical movement arm 98,. .. Are connected to the receiving plate mounting members 96,. When the seedling amount adjusting shaft 97 is rotated using a seedling amount adjusting lever (not shown), the seedling receiving plate mounting members 96,... And the seedling receiving plate 83 are moved up and down in parallel with the seedling mounting portion 80, thereby The amount of seedling taken by the stock insert 202 is adjusted.

  A belt-type seedling longitudinal for transferring the seedlings downward when all seedlings for one horizontal row located at the lower end of the seedling placing part are transplanted in the lower part on the back side of each seedling placing part 80-1 to 80-10 .. Are provided respectively. As shown in FIGS. 5 and 6, the seedling vertical feeding device 101 stretches an endless seedling feeding belt 102 having small protrusions formed on the outer peripheral portion between a driving roller 103 and a driven roller 104, and is driven by a tension spring 105. The rotating shaft 104a of the roller 104 is pulled in the direction in which the seedling feeding belt 102 is stretched. A drive arm 107 is attached via a ratchet mechanism 108 to the roller drive shaft 103a to which the drive roller 103 is attached. Further, as shown in FIG. 8, a seedling vertical feed arm 109 is integrally attached to the seedling vertical feed drive shaft 73, and a roller 110,... Is supported at the tip of the seedling vertical feed arm. . When the seedling mounting part 80 reaches the end of the left and right stroke, the drive arm 107 comes into contact with the roller 110 and the roller drive shaft 103a is rotated by a predetermined angle, so that the seedling feeding belt 102 is operated by a predetermined amount. It has become. When the roller 110 moves away from the drive arm 107, the drive arm 107 returns to the pre-drive posture due to the tension of the torque spring 111. In addition, an operation stop member 113 that is linked to the operation tool 71a for operating the hook clutch 71 via a wire 112 is provided. When the hook clutch 71 is operated to “disengage”, the operation stop member 113 is driven. The seedling feeding belt 102 does not feed by engaging with the roller 104.

  In the lower part on the upper surface side of each seedling mounting part, a seedling presser 115 for preventing the seedling from floating, and a resistance bar 116 for receiving the leaf of the seedling located at the lowest stage and lifting the leaf so that it does not hang downwards,. And are provided. The seedling presser 115 is rotatably supported by support columns 117 and 117 projecting from the partition walls 81 and 81, and the seedling presser non-acting state shown by a chain line in FIG. It can be switched to the state.

  The seedling transplanting machine 1 has a configuration for reducing the left and right widths of the seedling planting unit 4 during transportation and storage. First, the structure which folds the right-and-left end part of the seedling mounting part 80 is demonstrated (refer FIGS. 6-10).

  A partition wall 81-4 that divides the third seedling mounting part 80-3 and the fourth seedling mounting part 80-4 from the left is divided into an inner part 81a and an outer part 81b, and the inner part 81a. Is integrally formed with the center seedling mounting portions 80-4 to 80-8, and the outer portion 81b is formed integrally with the three left outer seedling mounting portions 80-1, 80-2, 80-3. Yes. This partition wall 81-4 is formed higher than the other partition walls except the partition wall 81-9. Then, a single rotating shaft 121 is inserted through the cylindrical portions 120a, 120b,... Formed at the upper end portions of both the inner and outer portions 81a, 81b. The strip seedling mounting parts 80-1, 80-2, 80-3 are inverted inwardly, and the corresponding parts of the fourth to sixth seedling mounting parts 80-4, 80-5, 80-6 from the left side are reversed. They are folded so that they overlap. .. Are attached to the tops of the columns 117,... Provided on the fifth to seventh partition walls 81-5, 81-6, 81-7 from the left side. When the seedling mounting part is folded, the tops of the columns 117,... Provided on the partition walls 81-1, 81-2, 81-3 engage with the column receivers 122,.

  The partition wall 81-9 that divides the second seedling mounting part 80-9 and the third seedling mounting part 80-8 from the right is divided into an inner part 81a and an outer part 81b. The part 81a is formed integrally with the seedling mounting parts 80-4 to 80-8 in the central part, and the outer part 81b is formed integrally with the seedling mounting parts 80-9 and 80-10 of the right outer two stripes. The partition wall 81-9 is formed higher than the partition wall 81-4 with respect to the seedling mounting surface. Then, a single rotating shaft 121 is inserted through the cylindrical portions 120a, 120b,... Formed at the upper ends of both the inner and outer portions 81a, 81b. Fold the seedling mounting parts 80-9 and 80-10 in the upper direction and fold the part so as to overlap the third and fourth seedling mounting parts 80-7 and 80-8 from the right. ing. A concave support column 122 is fixed to the bottom surface of the leftmost partition wall 81-1, and the support column provided on the rightmost partition wall 81-11 when the right outer two seedlings are folded. The top of 117 engages with the column support 122. Further, the top of the support column 117 provided on the partition wall 81-8 and the top of the support column 117 provided on the partition wall 81-10 are connected by the auxiliary support column 123 to support the seedling mounting portions 80-9 and 80-10.

  Regarding the arrangement of the cylindrical parts, the cylindrical part 120a corresponding to the inner part 81a and the cylindrical part 120b corresponding to the outer part 81b are arranged in three upper and lower parts, and 120b, 120a, 120b from the top. , 120a, 120a, 120b are arranged in this order. Further, there is no gap between the upper two sets of cylindrical portions 120a and 120b, but a gap S is provided in the lowermost cylindrical portions 120a and 120b. This is due to the following reason. That is, since the L-shaped main body part 83b of the seedling receiving plate 83 has an acute angle in a side view, the seedling mounting parts 80-1, 80-2, 80-3 on the left outer three lines and the seedling mounting on the right outer two lines The seedlings 80-9 and 80-10 cannot be reversed at the same positions, and the seedlings are pushed up by the gap S along the inclination of the seedling mounting portion in order to avoid interference with the L-shaped main body portion 83b. This is for inverting the mounting portion.

  In FIG. 9, reference numeral 82 denotes the horizontal frame. The horizontal frame includes the seedling mounting portions 80-4 to 80-8 at the center and the seedling mounting portions 80-1, 80-2 and 80-3 (or 80 −9, 80-10) in the vicinity of the boundary portion 82A and the outer portion 82B. The mounting member 88 is fixed to both left and right end portions of the central portion 82A, and the fixing member 124 is fixed to the inner end portion of the outer portion 82B so as to face the mounting member 88. The fixing member 124 is formed with a round hole 125 penetrating left and right, and the mounting member 88 is formed with a screw hole 126 on an extension line of the round hole 125. A fixing rod 127 threaded at the tip is inserted into the round hole 125 of the fixing member 124 from the outside, and the tip screw is screwed into the screw hole 126 of the mounting member 88, so The parts 80-1, 80-2, 80-3 (or 80-9, 80-10) are fixed to the seedling mounting parts 80-4 to 80-8 in the central part. A small-diameter portion 127a is formed at an appropriate position of the fixing rod 127. When the fixing rod 127 is pulled out from the screw hole 126 when folding the seedling mounting portion on the left and right outer portions, the tip of the knock pin 128 is engaged with the small-diameter portion 127a. Therefore, the fixing rod 127 is prevented from coming out any more. Since the outer wall surface of the small diameter portion 127a is tapered, the fixing rod 127 can be pushed in. 129 in the figure is a spring that urges the knock pin 128 toward the fixed rod.

  Reference numeral 131 in FIG. 10 denotes a horizontal pipe provided at the upper part of the back surface of the seedling mounting portion. , 80-3 (or 80-9, 80-10) near the boundary portion 131A and the outer portion 131B. A male screw member 132 is fitted on the inner end side of the hollow portion of the central portion 131A. A fixing rod 134 having a screw hole 133 formed at the tip is inserted into the horizontal pipe 131 from the outside, and the screw hole 133 is screwed into the male screw member 132, whereby the seedling mounting parts 80-1 on the left and right outer parts are 80-2, 80-3 (or 80-9, 80-10) is fixed to the seedling mounting part 80-4 to 80-8 in the central part. The mechanism for preventing the fixing bar 134 from dropping is the same as that of the fixing bar 127, and the knock pin 137 urged by the spring 136 is engaged with the small diameter portion 134a of the fixing bar 134.

  In the state where the left and right outer side seedling mounting portions are unfolded, the center seedling vertical feeding device 101A and the left and right outer side seedling vertical feeding device 101B are configured to be transmission-coupled (see FIG. 6). In other words, the roller drive shaft 103aA of the center seedling vertical feed device 101A is a drive clutch body having a drive arm 107 attached to its inner end via a ratchet mechanism 108 and a clutch pawl at its outer end. 140 is integrally attached. The drive clutch body 140 is engaged with a driven clutch body 141 attached to the outer roller drive shaft 103aB. The driven clutch body 141 is fitted to the roller drive shaft 103aB on the outer side so as to rotate integrally, is slidable in the axial direction, and is urged toward the shaft end side by a spring 142. Therefore, when the clutch bodies of the drive clutch body 140 and the driven clutch body 141 are connected, the driven clutch body 141 can escape even if both clutch claws collide with each other. Even if the body 141 is out of phase, the body 141 can be connected without difficulty and can be quickly bitten.

  As shown in FIG. 5, the seedling support frame 85 is provided with a horizontal frame 85b horizontally above the vertical frames 85a and 85a whose bases are fixed to the unit transmission portions 62-2 and 62-4. Rotating frames 85c and 85c are rotatably provided at the left and right ends of the rollers, and rollers 86 and 86 for supporting the seedling mounting portions 80-4 to 80-8 in the central portion at the upper ends of the vertical frames 85a and 85a. , And rollers 86 and 86 for supporting the left and right outer seedling mounting portions 80-1, 80-2, and 80-3 (or 80-9 and 80-10) at the distal ends of the rotating frames 85c and 85c. Is attached.

  As shown in FIG. 11, the roller 86 supporting the right and left outer seedling mounting portions has a roller shaft 86a fitted in a roller shaft hole of the rotating frame 85c so as to be slidable in the axial direction. The spring 86b that is loosely fitted is urged in a direction away from the rotating frame 85c, and is prevented by a split pin 86c inserted through the roller shaft 86a. A finger hook 86d is fixed to the end of the roller shaft 86a. When the finger is put on the finger hook 86 d and the roller shaft 86 a is pulled downward, the roller 86 is detached from the U-shaped recess of the upper rail 87.

  The connecting portion between the horizontal frame 85b and the rotating frame 85c is fitted to the shaft 85d on the side of the horizontal frame 85b so that the cylindrical portion 85e on the side of the rotating frame 85c is rotatable and slidable in the axial direction. A wavy cam 85f is formed integrally with the cylinder 85e, and the cylinder 85e is urged upward by a spring 85h so that a pin 85g inserted perpendicularly to the shaft 85d contacts the cam 85f. Yes. Normally, the pin 85g is engaged with the concave portion of the cam 85f, and the rotation frame 85c is stabilized in a state of facing the left and right sides. A stopper 85i is secured to the cam 85f so that the rotation frame 85c does not rotate to the seedling mounting side than the stable state.

  Further, the middle part of the seedling feed belt operation stopping wire 112 of the outer two strips is fixed at an appropriate position of the rotating frame 85c. For this reason, when the roller 86 supporting the right and left outer seedling mounting parts is detached from the U-shaped recess of the upper rail 87, the outer two strips of the seedling mounting part are folded and pulled by the wire 112, and the rotating frame 85c. Pivots backwards. At this time, since the pin 85g slides along the wavy cam 85f, the rotation frame 85c rotates smoothly.

  Next, based on FIGS. 12-14, the structure of the right-and-left end bending part of the transmission case 60 is demonstrated. The second connection pipe 64 includes an inner pipe 64A on the planting transmission case 62-2 (or 62-4) side and an outer pipe 64B on the planting transmission case 62-1 (or 62-5) side. The outer pipe 64B is pivotable upward with respect to the inner pipe 64A, with the pivot point 170 in the front-rear direction positioned above the joint of both pipes as a fulcrum. The rotation fulcrum shaft 170 is inserted through a rotation fulcrum shaft insertion hole 172 formed at the center of the rotation fulcrum shaft support 171 of the outer pipe 64B, and the front and rear ends thereof are fixed to the inner pipe 64A. It is rotatably supported by bearings 176 and 176 provided on the connecting plates 174 and 175, respectively.

  A flat chamfered portion 170a is formed at the front and rear central portion of the rotation fulcrum shaft 170, and the tip end portion of the rotation fulcrum shaft fixing bolt 178 screwed from the upper surface side of the rotation fulcrum shaft support portion 171 is the chamfered portion. The rotating fulcrum shaft 170 is fixed so as not to rattle in the vertical direction. Further, by fixing the bearings 176 and 176 with bearing fixing bolts 179 and 179 screwed from the outer surface side of the connecting plates 174 and 175, the rotation fulcrum shaft 170 is prevented from rattling in the left-right direction.

  The joint part of both the pipes 64a and 64b has a structure in which the tapered convex part 183 on the inner pipe 64A side and the tapered concave part 184 on the outer pipe 64B side are fitted. A pair of left and right adjustment bolts 185 and 185 screwed to the inner pipe 64A by lock nuts 185a and 185a are provided below the joint, and the lower end of the inner end surface of the outer pipe 64B is attached to the head of the adjustment bolt. is recieving. By changing the screwing amount of the adjusting bolts 185 and 185, the left and right and up and down inclinations of the outer pipe 64B with respect to the inner pipe 64A can be adjusted.

  When the second connecting pipe 64 is straight, the fixing plate 188 fixed to the fixing handle 351 whose base is pivotably supported around the left and right axis is fixed to the inner pipe 64A by the lock nut 189a. When the head of the screwed fixing bolt 189 contacts, both the inner and outer pipes 64A and 64B are fixed so as not to be separated.

  When the fixed handle 351 is rotated downward from the above state, the second connection pipe 64 is released. In this state, when the outer pipe 64B is bent 90 degrees upward with respect to the inner pipe 64A, the tip of the lock pin 193 provided on the outer pipe 64B is fitted into the lock pin hole 174a formed in the connecting plate 174. The second connecting pipe 64 is fixed in this posture.

  The planting main shaft 70 is divided into an inner portion 70A and an outer portion 70B at the bent portion of the second connecting pipe 64. When the inner pipe 64A and the outer pipe 64B are joined, both portions 70A are engaged by the claw clutch 194. 70B are connected and the second connecting pipe 64 is bent, the pawl clutch 194 is released and the outer portion 70B rotates together with the outer pipe 64B. Since the claw clutch 194 is configured such that the claw 194a on the inner side 70A side and the claw 194b on the outer side 70B side are engaged with each other only at one place, the claw clutch 194 is engaged when the inner side 70A and the outer side 70B are connected. Error, phase of operation of the outer two strips, ie, the first and second planting devices 200-1, 200-2 (or the ninth and tenth planting devices 200-9, 200-10 from the left side) Is prevented from shifting.

  FIG. 16 is a diagram illustrating the structure of the split portion of the float support shaft. The float support shaft 211 includes a center portion 211A that supports the center float 210C and the mid floats 210M and 210M, and left and right end portions 211B and 211B that support the side floats 210S and 210S. The connecting members 260 and 261 are engaged with each other. Since the couplers 260 and 261 are formed long in the front-rear direction, the rotation of the central portion 211A by the operation of the planting depth lever 215 is reliably transmitted to the left and right end portions 211B and 211B. In addition, with this configuration, mud flows backward through the space portion 262 that is formed inside the couplers 260 and 261 and communicates with the front and rear, so that poor connection due to biting mud or the like does not occur.

  When the left and right end portions of the transmission case 60 are turned upward and bent, the folding portions 211B and 211B are also folded upward, and when the left and right end portions of the transmission case 60 are connected to the main body side, they are linked. Thus, the two parts 211A and 211B are connected. Thus, since it is not necessary to operate the float support shaft 211 at the time of folding and returning, the labor for reducing the lateral width of the paddy field work machine in general is reduced. When the float support shaft 211 is folded, the planting depth lever 215 is operated to the transport position, that is, the position where the floats 210 are lifted. At this time, since the couplers 260 and 261 are parallel to the rotation fulcrum shaft 170, the couplers 260 and 261 do not protrude downward and do not get in the way when the float support shaft 211 is folded.

With the above-described configuration, the seedling transplanting machine 1 folds down the two sides of the machine body at the time of transportation and storage to reduce the left and right widths (FIG. 17).
(1) Auxiliary step, (2) Fixing tool, fertilizer storage unit, fertilizer hose, (3) Seedling frame, (4) Expansion step, side footrest, (5) Marker support frame, drawing marker, side marker, etc. Prepare for storage in advance.
(6) The auxiliary inner rear wheels 21, 21 and the auxiliary outer rear wheels 22, 22 are slid inward.
(7) The seedling placement portions 80 corresponding to the two left end portions are inverted upward inwardly, the seedling placement portions 80 corresponding to the two right end portions are inverted upwardly, and the seedling placement portion 80 is folded. Accordingly, the rotation frames 85c and 85c of the seedling support frame 85 are rotated rearward.
(8) The seedling placement unit driving mechanism is operated so that the center of the folded seedling placement unit 80 is the left and right center of the vehicle body.
(9) Remove the locking tool and the locked tool 164, and pull out the folding portions 97B and 97B of the seedling removal amount adjusting shaft. Then, the disengagement state maintaining lever 166 is operated to lock the seedling removal amount adjusting shaft 97 in the disengagement state.
(10) Remove the removal parts 83B and 83B of the seedling receiving plate 83.
(11) The second connecting pipe 64 of the transmission case 60 is bent upward by about 90 degrees at the middle part, and the outermost unit transmission parts 62-1 and 62-5 and the two outer strip planting devices 200 attached thereto. -1,200-2,200-9,200-10 is rotated upward. In conjunction with this, the folding portions 97B and 97B of the seedling removal amount adjusting shaft are folded upward, and the left and right end portions 211B and 211B of the float support shaft 211 are rotated upward together with the side floats 210S and 210S.

(Lock arm)
The seedling planting unit 4 of the seedling transplanting machine is a side that is a planting main shaft in which the seedling mounting unit 80 and the planting device 200 are arranged in parallel corresponding to the planting strips and are commonly transmitted at the lower ends of the side by side seedling mounting units 80. The planting main shaft 70 is provided so that the planting device 200 at the outer end can be folded together with the planting main shaft 70.

  As shown in FIG. 18 in an enlarged side view, the folding portion is formed with a restricting portion 221a for fixing the outer portion 70B of the planting main shaft 70 transmitted to the planting device 200 at the outer end in the unfolded state. The lock arm 221 is provided with a shaft support part 223 that pivotally supports a range A extending from the fixed position of the restricting part 221a to the release position, and the restricting part 221a and the shaft at the fixed position. The support part 223 is arranged at the front side position of the planting main shaft 70 while being divided up and down. Further, the lock arm 221 forms a gripping part 224 for swinging operation that is bent so as to protrude from the restricting part 221a to the front side of the machine body at a fixed position.

  Since the lock arm 221 having the above configuration is disposed facing the open space on the front side of the planting main shaft 70, the operator can swing the lock arm 221 to the fixed position without difficulty. In addition, the lock arm 221 having the above-described configuration can efficiently apply an operating force to the restricting portion 221a via the grip portion 224 adjacent to the restricting portion 221a, so that the lock arm 221 can be easily operated to the fixed position. Can do.

(Planting transmission case)
As for the planting transmission case 62, as shown in FIG. 19 which is an enlarged side view represented by partial fracture, a brake mechanism that presses the lining 233 with the pressing force of the spring 232 on the planting drive shaft 65 is formed on the rear cover 234. With this brake mechanism, the shaving of the implanted ridge can be reduced with a configuration that can be easily replaced.

(Planting depth adjustment)
As shown in FIG. 20, an enlarged side view of the main part is attached to the float 210, and a motor 241 as an actuator for changing the height is attached, and the height can be set with a dial. Further, as shown in the side view of FIG. 21, a folding check switch 242 using a magnet switch is provided on the fixed side, and a magnet 243 is attached corresponding to the movable side. With this switch signal, it can be controlled to the deepest height position when folded, making it easy to engage when unfolded, resulting in the need for a depth lever and easy folding by reducing one operation. Become.

(Proximity sensor)
The seedling planting unit 4 is provided with an approach sensor 251 in a rearward direction at the rear part (see FIGS. 1 and 2). When a moving object is detected, as shown in the system configuration diagram of FIG. The control unit C is configured so that the operation of the seedling planting unit 4 is stopped by 252 and the vertical movement is also stopped. In this way, when there is a person in the vicinity of the seedling planting part 4, the safety can be ensured.

(Marker)
As shown in FIG. 23, an enlarged side view of the main part of the mechanical marker operating device is added with a cable 253 for pulling a cam for storing the marker. The lever is provided on the side of the clutch lever of the step. By operating the lever, the marker can be stored without raising the seedling planting part 4, so that the conventional problem that the seedling planting part 4 cannot be stored without raising the seedling planting part 4 is solved. However, the marker can be accommodated for work as required.

(Seedling box type seedling transplanter)
Next, the pitching adjustment mechanism of the planting part will be described.
First, an example of a seedling box type seedling transplanting machine that supplies seedling cups to which the pitching adjustment mechanism is applied will be described with reference to FIGS.

  A seedling transplanting machine 1 for carrying out the present invention is an eight-plant fertilized seedling transplanting machine, and a seedling planting part 4 is mounted on the rear side of a vehicle body 2 via a lifting link device 3 so as to be movable up and down. At the rear, a fertilizer hopper 5a of the fertilizer application device 5 and a fertilizer feeding device 5b for feeding the fertilizer for each strip are arranged.

  The vehicle body 2 includes a pair of left and right steerable front wheels 6 and 6 which are driven to rotate and a pair of left and right rear wheels 7 and 7 which are driven to rotate. A transmission case 9 is disposed on the front side of the front and rear frame 8, and an engine E is disposed on the rear side. The rotational power of the engine E is mounted and transmitted to the transmission case 9 via the first belt transmission device 10 and the second belt transmission device 11. The power shifted by the transmission in the transmission case 9 is transmitted to the front wheels 6 and 6 and the rear wheels 7 and 7, and to the seedling planting section 4 via the transmission shaft 9a, the intermediate gear case 9b, and the transmission shaft 9c. Be transmitted. A steering handle 12 for steering the front wheels 6 and 6 is provided on the front side of the vehicle body 2, and a control seat 13 on which a driver is seated is provided on the rear side of the handle 12. Reference numeral 14 denotes a step floor, 15 denotes a preliminary seedling placement section, 16 denotes a drawing marker, and 17 denotes a spray water tank.

  In addition, L1 is a change lever for switching missions, L2 is a speed change lever, L3 is a planting lift lever for moving the planting portion on and off and raising and lowering the planting portion, and L4 is a working state and a non-working state of the planting portion L5 is a sub-sensitivity adjustment lever that adjusts the sensitivity of the planting part elevation control, L6 is a lowering lock lever that regulates the descent of the planting part, and D is a sensitivity adjustment dial that adjusts the sensitivity of the ground elevation control It is.

  The seedling planting unit 4 is configured to be vertically planted, and is configured to be lifted up and down by a lifting hydraulic cylinder 26 via a lifting and lowering hydraulic (electromagnetic) valve 27. Four sets of slanted upper and lower two-stage seedling box supply units 30, 30... Are provided side by side, and seedling box main transport units 31, 31. A box conveyance path is configured. Each seedling box main transport unit 31 transports the seedling boxes supplied one by one in order from the upper and lower two-stage seedling box supply units 30 and 30 downward in the first half, gradually changing the transport direction in the middle, upward in the second half It is formed in a substantially U-shape in a side view to be conveyed. An empty box housing frame 38 that is connected to the terminal portion of the seedling box transport unit 31 and can accommodate a plurality of empty seedling boxes that have been taken out at a seedling extraction position P, which will be described later, in a stacked manner. Is provided. A guide body 40 for guiding the empty box from above is provided at a portion corresponding to the joint between the empty box guide rails 39a and 39b so that the seedling box can be smoothly moved around. By the way, the empty seedling box after the seedling is taken out is provided so that the empty box guide rail 39 bends upward in a U shape, so that it is transported upward again and discharged from its upper end. The empty seedling box is accommodated in the empty box accommodation frame 38.

In addition, as the seedling box C used for this kind of seedling transplanting machine, a flexible seedling tray in which seedlings are accommodated one by one in a seedling pot C1 arranged in a large number of lengthwise and widthwise is used.
A seedling box supply device 29 for supplying the seedling box in the seedling box supply unit 30 to the main transport unit 31 is provided. An idling roller 20,... Is provided on the bottom surface of the seedling box supply units 30, 30 so that the placed seedling box slides backward due to its own weight. At the rear end of each seedling box supply unit 30, as a supply device 29 for supplying the seedling box to the transport path of the seedling box main transport unit 31, the right and left edges of the seedling box are gripped and the seedling box is placed on the main transport unit side. A pair of left and right supply rollers 21 and 22 that are fed forward, and a wide feed that is positioned in front of the supply roller and that has protrusions formed on the outer periphery engage with the gap between the pots from below to feed the seedling box A roller 23 is provided. The lower supply roller 22 and the feed roller 23 of the upper and lower seedling box supply unit are driven to rotate by motors M1 and M2, respectively.

  Also, corresponding to each seedling box main transport unit 31, a seedling box feeding device 32 that transports the seedling box along the seedling box transport path, and a seedling box being transported at the seedling extraction position P of the seedling box main transport unit 31. A seedling picking device 33 for picking out seedlings from the side of the pot one row at a time, a seedling transporting device 34 for transporting the picked seedlings with a trajectory that draws an arc on the lower front side, and a seedling extraction for extracting seedlings from the seedling transporting device A device 35, a seedling lateral feed device 36 that laterally feeds to the left and right sides of each half of the horizontal row extracted by the seedling removal device, and planting for taking seedlings supplied by the seedling lateral feed device and planting them in the field A device 37 is provided.

  A planting transmission frame 45 extends rearward from the lower left and right horizontal portions of the frame 42 integral with the drive case 41, and a seedling support frame 46 is fixed to the upper surface of the drive case 41. A seedling box supply unit (supply table) 30 is supported. The rolling support shaft 24 is rotatably supported by a bearing case 50 attached to a planting portion support bracket 48 fixed to the left and right central portions of the frame 42, and the entire planting portion is supported so as to be capable of rolling. The entire planting unit drives the rolling motor 25 in the forward / reverse direction by an operation signal from the control device so that the detected value is maintained at the set value based on the detected value of the horizontal sensor 43 provided on the drive case 41. Thus, the planting part is controlled to roll right and left around the support shaft 24 via the rolling spring 28. In addition, even if it replaces a planting part, the malfunction of an operation | movement can be eliminated by installing the said horizontal sensor 43 behind the removal | desorption part of a planting part.

  Below each unit, four floats 52, 52, 53, 53 that slide while leveling the farm scene during planting work are provided, and are pivotally attached to the rear end of the support arm 56 so as to be rotatable up and down. ing. On each of the left and right sides of these floats, there are attached a grooving device 54,... For forming a fertilizer groove in the field near the planting position of each row, and a fertilizer guide 5c on the rear side thereof. A fertilizer hose 5d for transferring the fertilizer from the fertilizer feeding device 5b is connected to 5c.

  The seedling box feeding device 32 includes a pair of left and right feeding claws 60, 60 and locking claws 61, 61. The feeding claws 60, 60 reciprocate up and down along the seedling box conveyance path, and when they move downward, the seedlings Engage with the square hole for feeding the seedling box that is drilled at the left and right edges of the box at the same pitch as the pot, and when moving up, the engagement with the square hole is disengaged and it rides over to the next square hole. Operates as follows. The locking claws 61, 61 are interlocked with the movement of the feed claws 60, 60. When the feed claws 60, 60 move downward, they are disengaged from the square holes, and when the feed claws 60, 60 move upward, they engage with the square holes. Combined to operate to support the seedling box. By the operation of the feed claws 60, 60 and the locking claws 61, 61, the seedling boxes are intermittently fed along the seedling box transport path 31 by one pitch of the pot arrangement. The feeding operation of the seedling box feeding device 32 is performed when the seedling pushing pins 72,... Of the seedling picking device 33 described later are not inserted into the seedling box pot. Further, the feeding claws 60, 60 and the locking claws 61, 61 are transported on the upper side of the conveyance so that the locking claws 61, 61 protrude from the square hole of the preceding seedling box and project into the seedling box conveyance path. Blocking claws 63 and 63 are provided for temporarily receiving the succeeding seedling box sliding down the box transport path 31.

  The operation mechanism of the seedling box feeding device 32 is provided with a seedling box feeding cam 65 on a first transmission shaft 64 that penetrates the upper portion of the drive case 41, and a roller 67 that is rotatably supported by the seedling box operating arm 66 is provided with a cam 65. The seedling box feed operation arm 66 is urged by a spring 68 so as to always abut against the outer peripheral surface. The rotation of the seedling box feed cam 65 causes the seedling box feed operating arm 66 to swing, and the swing of the seedling box feed operating arm 66 is transmitted to the seedling box feed driving arms 70 and 70 via the seedling box feed driving shaft 69. The feed claws 60, 60 are reciprocated up and down. When the cam 65 pushes the roller 67, the feed claws 60, 60 move downward to feed the seedling box.

  When the feed claw 60 is moved down to the lowest point, the seedling box feed drive arm 70 is provided so as to push the sensing switch 71. When the sensing switch 71 is not pushed, an interlocking sound is generated. Can be kept. According to this configuration, when the seedling box feeding failure occurs due to clogging or the like in the seedling box supply unit, the drive arm 70 of the feeding claw 60 does not press the detection switch 71, so that the operator is notified by an alarm buzzer. It can prevent planting defects such as continuous stockouts.

  In the transport path of the seedling box supply units 30 and 30 and the seedling box main transport unit 31, seedling box detection sensors SW1 to SW7 for detecting the presence or absence of the seedling box are provided. SW1 (SW5) has a seedling box when the seedling box is placed on the upper (lower) seedling box supply unit 30. SW2 (SW6) has a seedling box when the upper (lower) supply rollers 21 and 22 are holding the seedling box. SW3 is provided at the junction of the upper conveyance path and the lower conveyance path, and the seedling box is present when the upper or lower supply rollers 21 and 22 are fed out just before the seedling box is opened.

  SW4 is provided between the position of SW3 and the position immediately before the seedling extraction position P, and the seedling box is present immediately after the upper or lower supply rollers 21 and 22 open the seedling box. Further, the seedling box detection sensor SW4 is configured by a contact type sensor, and the contact operation portion t of the sensor is disposed so as to be positioned from the transport upper side to the lower side of the operation position of the blocking claw 63, When this sensor detects that there is no seedling box, the next seedling box is fed out and supplied by the operation of the supply rollers 21 and 22 of the seedling box supply device 29 in conjunction with this. Immediately before the seedling box supplied in this way is received by the blocking claw 63, the contact resistance is received by the pressing spring force of the contact detection sensor itself, and a braking action is applied to the seedling box, so that the drop speed is reduced. Has come to ease.

  SW7 is a detection sensor that detects the position of the seedling box operating arm 66 that drives the seedling box feed driving arm 70, that is, a sensor that detects the operating positions of the feeding claw 60 and the locking claw 61, and the seedling box operating arm When 66 is moved up, it is pushed and turned off.

  In the configuration example shown in FIG. 27, the seedling box detection sensors SW1 to SW7 and the float angle of attack sensor are connected to the controller as shown in FIG. And based on the information from each sensor, a controller outputs to motor M1, M2, a seedling reduction lamp, a reduction buzzer, and a raising / lowering hydraulic valve. FIG. 29 is a flowchart of control in the controller. The input from each of the detection sensors SW1 to SW7 is read, compared with the operation table shown in FIG. 30, and output is performed according to the pattern of the corresponding input condition. No output is performed when none of the input conditions is met.

  In the operation table shown in FIG. 30, for SW1 to SW6, “0” indicates that there is no seedling box, “1” indicates that there is a seedling box, and the blank portion indicates that there is no seedling box or there is a seedling box. For SW7, “1” is set to OFF, and the blank portion is set to ON or OFF. “Priority” is a flag for program processing, and the switching condition is NO. 8 and NO. 13 The blank portion of “priority” is “1” or “2”, and “priority” at power-on is “1”.

  Before planting, one seedling box is loaded on the upper conveyance path and two seedling boxes are placed on the upper and lower seedling box supply sections. In this work start state, SW1 to SW7 are “1” and the priority is “1”, which does not correspond to any input condition, so the motors M1 and M2 are stopped. When the planting operation is started from the above state, the feeding claw 60 and the locking claw 61 are operated to intermittently feed the seedling box by one pitch. Synchronously with this, each part of the planting unit 4 operates, and at the seedling extraction position P, seedlings are taken out from the pots in the horizontal row of the seedling box and are planted in the field. When the work progresses and the last tail of the seedling box (first seedling box) being taken out comes to a position just before the seedling picking position P, and SW3 and SW4 become “0”, NO. Therefore, the motor M1 is activated. Thereby, the seedling box (second seedling box) next to the upper seedling box supply unit is fed to the upper transporting unit. When the second seedling box is drawn out just before it is opened, the top part of the second seedling box reaches the junction of the upper and lower conveying paths, and SW3 becomes “1”. This state is NO. For SW1 to SW6. This corresponds to the input conditions of 6-1. Therefore, when the feeding claw 60 is fed, that is, when the locking claw 61 does not support the seedling box, the motor M1 is temporarily stopped, and then the locking claw 61 supports the seedling box and the seedling box blocking claw 63 is moved. When it enters the seedling box conveyance path and receives the lower end of the seedling box (SW7 is “1”), the motor M1 is restarted to open the second seedling box. Then, the second seedling box is once received by the blocking claw 63.

  When the second seedling box is opened and SW2 becomes “0”, NO. The input condition is switched to 4, the operation of the motor M1 is continued, and the leading portion of the next third seedling box is gripped by the supply roller. Then, SW2 becomes “1” and does not correspond to any input condition, so the motor M1 stops. When the operation proceeds in this way and the rear tail of the third seedling box passes the position immediately before the seedling extraction position P and SW3 and SW4 become “0”, NO. 13 input conditions, and “priority” is switched from “1” to “2”. Then, this time, the motor M2 operates to feed out the seedling box (fourth seedling box) of the lower seedling box supply unit. Hereinafter, similarly to the case where the second seedling box and the third seedling box of the upper seedling box supply unit are supplied to the upper transporting unit, the motor M2 is operated in a timely manner, and the fourth seedling box and the fifth seedling box of the lower seedling box supply unit are operated. The seedling boxes are sequentially supplied to the lower conveyance unit, and the seedlings are taken out from the respective seedling boxes. When the last fifth seedling box is released from the lower supply roller, NO. 1 is input and output to the seedling reduction lamp. When the seedling reduction lamp lights up, the seedlings are supplied to the upper and lower seedling supply parts. Further, even if the seedling reduction lamp is turned on, the seedling is not replenished, and when the last tail of the fifth seedling box passes the position immediately before the seedling extraction position P and SW3 and SW4 become “0”, NO. Since the input condition No. 3 is continued for 4 seconds or more, it is output to the seedling reduction buzzer 4 seconds after the condition is satisfied.

  Through the above process, the seedling box of the seedling box supply unit is automatically supplied to a predetermined position of the main transport unit. During this operation, the last tail of the seedling box being extracted is immediately before the seedling extraction position P. When the seedling box detection sensors SW3 and SW4 become “0” after reaching the position, NO. 5 (or NO · 10, NO · 13), and the operation of the motor M1 or M2 causes the next seedling box in the seedling box supply section to be fed out to a predetermined position in the main transport section. When the seedling box is not sent to the predetermined position even if the motor M1 or M2 is operated for a predetermined time (about 5 seconds) or more, the seedling box detection sensor SW3 is turned OFF, and the seedling box feed is poor. The alarm is output to the alarm device BZ to notify the operator. As a result, the operator can determine that the seedling box feed is defective and deal with it promptly.

  In the automatic seed box feeding device, the rotational speeds of the motors M1 and M2 for feeding the seedling box in the upper transport path and the lower transport path can be switched. The rotational speed of the upper motor M1 is slower than the rotational speed of the lower motor M2. That is, as shown in FIG. 29, the rotation speed is slowed by the pulse output of the motor M1 with respect to the continuous output of the motor M2. This is because the upper conveyance path has a large inclination angle at which the seedling box falls with respect to the lower conveyance path, so that both ends of the seedling box are easily damaged when hitting the blocking claw. When feeding the upper stage at the time of automatic supply, the rotational speed of the motor M1 is slowed so that the speed when hitting the blocking claw is the same in both the upper and lower stages, and damage to both ends of the seedling box can be prevented.

  Note that, as shown in FIG. 30, the rotation speed can be slowed by setting the motor M1 to a minute pulse output with respect to the pulse output of the motor M2. In addition, by making the rotational speed of the motor and the free fall speed of the seedling box between the detection sensors SW1 and SW2 substantially the same, the impact force when the seedling box collides with the roller of the motor unit is reduced, and the seedling box is damaged. Can be prevented.

  Note that the seedling box detection sensor SW has a configuration in which the contact operation portion t of this sensor acts on the pot C1 portion of the seedling box C to sense it, and can be used as the detection sensor of the SW1 to SW6. Since each of these detection sensors is sensed on the side surface of the pot portion, it is not affected by mud, and the pot portion can be reliably sensed because of a round shape formed regularly.

  The seedling take-out device 33 operates integrally with a pair of left and right slide shafts 73, 73 in which seedling pushing pins 72,... Arranged in the same number and pitch with respect to the pot in the lateral direction of the seedling box are supported slidably in the front-rear direction. It is provided to do. A rack 73a is formed on the slide shaft 73, and a first sector gear 74 is engaged with the rack. Further, another second sector gear 76 is attached to the gear shaft 75 to which the first sector gear 74 is attached, and the second sector gear 76 is rotatably supported by the support shaft 78. The arm 79 meshes with the gear portion 79a of the arm 79. A roller 80 is rotatably supported at the end of the seedling extraction operating arm 79 opposite to the gear portion 79 a, and the roller 80 is fitted in the guide groove 81 a of the seedling extraction cam 81. The slide shafts 73, 73 slide back and forth by the rotation of the seedling extraction cam 81, and when the slide shaft slides backward, the seedling push-out pins 72, ... are pots corresponding to one horizontal row of the seedling box at the seedling extraction position P. On the other hand, it is inserted into the pot through the cut at the bottom of the pot, and the seedling is pushed backward.

  The gear shaft 75 is provided with a safety clutch 75a that cuts off the transmission from the first sector gear 74 to the gear shaft 75 when a predetermined load or more is applied to the transmission system after the gear shaft 75.

  Further, the gear shaft 75 is provided with a mechanism 75b for adjusting the front / rear slide stroke of the seedling push pins 72,... And a mechanism 75c for adjusting the positions of the left and right slide shafts 73, 73. The seedling box feed cam 66 and the seedling extraction cam 81 are integrally formed in a common cylinder 64a that is rotatably fitted to the first transmission shaft 64, and a fixed position stop clutch that externally operates the cylinder and the first transmission shaft 64. It is connected by 64b so that transmission can be turned on and off.

  A sensor switch SW8 for detecting presence / absence of a seedling box is provided in front of the seedling extraction position P by the seedling pushing pins 72,... (See FIG. 27). Even if there is a seedling box in the seedling box supply section and the detection sensor SW1 or SW5 is in the ON state, if the SW8 is OFF, the seedling box feed failure is detected and the driving clutch is "disconnected" by driving the main clutch motor. It can also be configured to stop the running of the aircraft by actuating (the alarm device may be actuated at the same time). Therefore, this traveling stop allows the operator to detect that the seedling box feed is defective, and it is possible to prevent continuous stock removal by taking prompt measures.

  Further, a load sensor 126 is provided between the seedling pushing pin 72 and the slide shaft 73, and when the load value based on the detection result of the load sensor is light, the spraying time is set longer than usual. If the extrusion load of the extrusion pin is light, the pot is likely to collapse, so that the spraying time can be lengthened and mud adhesion to the seedling holder, the seedling feed belt, etc. can be reduced to stabilize planting. A push pin load sensor 126 and a planting lift lever sensor 127 are connected to the input side of the control unit 128, and an atomizing electromagnetic valve 129 is connected to the output side of the control unit. When the planting elevating lever sensor 127 detects that it is in the “planting” work state and a predetermined time has elapsed since the previous spraying, when the push pin load sensor value is “large” (heavy), the spraying electromagnetic valve 129 A signal that opens for a normal time is output. Conversely, when the push pin load sensor value is “small” (light), a signal for opening the atomizing electromagnetic valve 129 for a long time is output.

  Note that when the load sensor detects an abnormally heavy value, an alarm buzzer can be sounded to notify the operator. When the seedling pushing pin pushes out the position where the center of the seedling push pin is misaligned from the seedling box pot part, the load sensor gives a very heavy detection value, so that the planting failure can be prevented by notifying the operator of this.

  The seedling transporting device 34 includes a seedling holder 83 that holds a bed soil portion of the seedling pushed out from the seedling box by the seedling extruding pins 72. The seedling holder 83 has both left and right ends fixed to support members 86 and 86 connected to the upper and lower two swing links 84 and 85, and reciprocates along an arc locus by the swing of the swing link. It has become. The drive mechanism of the seedling transport device transmits the rotation of the first transmission shaft 64 as a repetitive rotational motion to the input shaft 92 of the seedling transport transmission case 91 via the arm 88, the telescopic rod 89, and the arm 90. A repetitive rotational motion is transmitted from the input shaft 92 to the seedling transport drive shaft 95 attached to the swing link 85 via a pair of transmission gears 93 and 94.

  In addition, as shown in FIG. 26, the seedling holder 83 has a stop position of the seedling holder when the planting clutch or the heel clutch is disengaged from the washing nozzle 116 in the direction to take the seedling when planting the seedling. It is configured to stop in the fountain area (a) where the fountain is to be fountained. According to this, even when the seedling is not planted, the seedling holder can be efficiently cleaned, mud adhesion is reduced, and the catching of the seedling is stabilized.

  The seedling removal device 35 includes a comb-shaped seedling hitting 100 that can pass back and forth through the seedling holding portion of the seedling holder 83. A seedling hitting arm 102 is attached to a rotating seedling attachment shaft 101 in a lateral direction provided rotatably, and a seedling hitting 100 is integrally attached to a turning arm 103 rotatably attached to the seedling hitting arm 102. . The rotating arm 103 can be rotated through a bolt 102a within the range of the long hole 103a. A roller 104 attached to the hitting arm 102 is urged by a spring 107 so as to come into contact with the cam surface of the seedling hitting cam 106 attached to the cam shaft 105. When the seedling tapping cam 106 is rotated, the seedling tapping 100 is quickly rotated downward by the tension of the spring 107 when the roller 104 is fitted into the concave portion of the cam, so that it immediately returns to the original position.

  When the seedling holder 83 has moved to the lower end of the movement trajectory, the seedling tapping 100 receives the seedling held by each seedling holding portion of the seedling holder 83 and passes only the seedling holder 83 to extract the seedling. It rotates downward and knocks the extracted seedling onto the seedling feeding belts 113, 113 of the seedling lateral feeding device 36 described later.

  The seedling lateral feed device 36 includes a pair of left and right seedling feed belts 113, 113 wound around a drive roller 111 and a driven roller 112 of a seedling lateral feed drive shaft 110 installed on a main frame. It is provided symmetrically so as to move to. A deflection preventing plate 114 for preventing the belt from being curled by the weight of the falling seedling is provided below the lateral feed portion. The seedlings N,... For one horizontal row removed by the seedling removal device 35 fall in alignment on the seedling feeding belts 113, 113, and the seedling feeding belts 113, 113 receiving the seedling feeding belts 113, 113 receive the seedlings in the left and right halves. Are transported to the left and right sides. The seedling N conveyed by the seedling feeding belt 113 is dropped between the pair of planting guides 115 and 115.

  Above the seedling feeding belts 113, 113, washing nozzles 116,... For washing mud adhering to the belts are provided. The water flow pipe 117 in which the washing nozzles 116,... Are integrally formed is supported by fixing mounting plates 118 integral at both ends to the planting part frame with bolts 119.

  In FIG. 31, when mud accumulates around the seedling feeding belt 113, a sound wave detecting device 124 is provided for detecting the mud pool. When this sound wave detection device detects a mud pool, it notifies the operator with an alarm buzzer, etc., so that the operator can quickly remove the mud pool, or it can be washed off with a washing nozzle by operating the spray device, It is possible to reduce seedling planting defects.

  The filter 160 used in the cleaning (spraying) apparatus is composed of upper and lower double filter screens 161 and 162, the lower filter screen 161 is fixed, and the upper filter screen 162 is attached to the lower end of the impeller 163. The shaft is pivoted around the shaft core 164 so as to freely rotate, and is swung with a force of entering water. Even with a filter using a double filtration network, the filter is clogged with dust, and the flow of water becomes worse during use. As in this example, according to the above configuration, clogging of the filter can be prevented by the rotation of the upper filtration net that rotates with the momentum of the incoming water and the accompanying swirling flow of water.

  The planting device 37 has a pair of seedling transplanters 122 and 122 attached to a rotating case 121 that rotates integrally with a planting drive shaft 120 provided at the rear end portion of the planting transmission frame 45, and the seedling transplanter 122 and 122 move along a closed loop tip locus. Each seedling planting tool 122 alternately takes seedlings dropped between the planting guides 115 and 115, and moves them between the planting guides 115 and 115 to plant them in the field.

(Pitching adjuster)
The seedling planting part 4 of the multi-row planting is mounted on the rear side of the vehicle body 2 through an elevating link device 3 in an overhang shape, and a seedling box type seedling transplanting machine that supplies seedlings by a large number of seedling boxes is In some cases, the pitching characteristics fluctuate depending on the amount of seedlings in the seedling placement part, and the balance is lost. In order to solve this problem, a pitching cylinder 171 is attached to the lifting / lowering link device 3 (see FIG. 24), and the pitching is changed when there are many seedlings and when there are few seedlings.

  Specifically, as shown in FIG. 32, which is an enlarged side view of the main part, the connecting part between the upper link 172 and the hitch 173 of the lifting / lowering link device 3 is a long hole 174, and the hitch 173 is inclined within the range of the degree of freedom. The pitching cylinder 171 is connected to the cylinder. The control of the pitching cylinder 171 is based on the standard number of 3 to 5 sensors SW1 or SW5 for detecting the seedling box in the seedling box transport unit 31 as shown in the control content division diagram of FIG. By adjusting the pitching so that the seedling box transport unit 31 is lowered rearward when it is small and forwardly lowered when it is large, the seedling box transport unit 31 can be balanced and stably planted.

Side view of riding fertilizer seedling transplanter Top view of riding fertilizer seedling transplanter Plan view omitting part of the seedling planting part Rear view with part of the seedling planting section omitted Side sectional view of the lower part of the seedling part A arrow view in FIG. Side view of the seedling mounting part showing a state where the seedling mounting part at the left and right outer ends is folded. A part view omitted from FIG. Sectional drawing of the upper connection part of the seedling mounting part of a center part and the seedling mounting part of the left-right outer part Sectional drawing of the lower connection part of the seedling mounting part of a center part and the seedling mounting part of the right-and-left outer part Front view of main parts of seedling support frame Rear sectional view of the bent part of the transmission case S1-S1 sectional view in FIG. S2-S2 sectional view in FIG. Side view of side float mounting (A) Plan view and (b) Plan view of the split part of the float support shaft Side view of seedling transplanter in reduced width Enlarged side view of folding part Enlarged side view of the planting transmission case, partially broken Enlarged side view of the main part of the float Folding check switch arrangement side view System Configuration Enlarged side view of the main part of the marker operating device Side view of another example seedling transplanter Top view of the seedling transplanter in FIG. Side view of the main part of the seedling planting part Side view of seedling box supply section and seedling box transport section Control block diagram of seedling box supply Flow chart for seedling box supply Operation division diagram of each member Rear view of seedling tapping and seedling feeding belt Enlarged side view of the main part of the lifting link device Pitching cylinder control division diagram

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 70 Planting spindle 70B Outer part 80 Seedling part 200 Planting device 221 Lock arm 221a regulating part 223 Shaft support part 224 Grasping part A Movable range

Claims (2)

The planting device (200) for taking out and planting the seedling behind the lower end of the seedling mounting portion (80) inclined downward is mounted in parallel with the body corresponding to the planting strip, and these side by side planting devices In a seedling transplanting machine comprising a planting main shaft (70) that is commonly transmitted to (200) in the vicinity of its front end, and configured so that the outer end planting device (200) can be folded inward along with the planting main shaft (70),
Lock arm (221) formed with a restricting portion (221a) for fixing the foldable outer portion (70B) of the planting main shaft (70) transmitted to the planting device (200) at the outer end to the unfolding support position. The lock arm (221) includes a shaft support portion (223) that pivotally supports a range (A) in which the restricting portion (221a) extends from the fixed position to the release position. A seedling transplanting machine characterized in that the part (221a) and the shaft support part (223) are arranged in the vertical direction on the front side of the planting spindle (70).   The said lock arm (221) is provided with the holding | grip part (224) for rocking | fluctuation operation formed by bending so that it may protrude from the control part (221a) to the body front side in a fixed position. Seedling transplanter.

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