JP2016220601A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seedling transplanter capable of preventing a support member of a rotor and a suspension member of the rotor from interfering with each other when the rotor is moved upward, achieving satisfactory planting accuracy, and thereby performing appropriate soil preparation.SOLUTION: The seedling transplanter includes: auxiliary wheels 12c 12d mounted on travel wheels 12a, 12b; a seedling planting part 3; rotors 39; plural rotor holders 203 suspending plural rotor support frames 205 and the rotors 39 so as to be moved vertically; and rotor arms 209 connecting lower parts of the rotor support frames 205 and lower parts of the rotor holders 203. The rotor holders 203 are arranged between the travel wheels 12a, 12b and the auxiliary wheels 12c, 12d. Connection pipes 217 connecting the respective rotor arms 209 are arranged in lower parts of the rotor arms 209. When a seedling planting part 3 is lowered, the rotor holders 203 are prevented from interfering with the travel wheel 12b. When the rotors 39 are lifted, the connection pipes 217 are prevented from coming into contact with the rotor support frames 205.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a seedling transplanter with a leveling device.

In a seedling transplanter equipped with a seedling planting apparatus with a float, a configuration is known that includes a rotor for leveling the field just before seedling planting by the seedling planting apparatus.
The following Patent Document 1 is provided with a center and left and right leveling rotor (leveling device) for leveling the seedling planting position, leveling the unevenness of the field scene with the leveling rotor, taking out the seedling from the seedling pot and taking it out A seedling transplanting machine for pot seedlings in which seedlings are transported to a planting apparatus by a seedling feeding device and seedlings are planted is disclosed.

  This leveling rotor has a structure in which the leveling height can be adjusted by moving the suspension link, which is a suspension member for suspending the leveling rotor, up and down by the adjustment lever, and the leveling work is performed according to the soil quality of the field. The height can be changed to ensure proper leveling.

Japanese Patent No. 5051114

  However, the vertical frame, which is a support member that supports the leveling rotor, and the suspension link connect the upper and lower parts of each, and this connection configuration causes insufficient clearance when the leveling work height of the leveling rotor is changed upward. Since the distance between the vertical frame and the suspension link is short, the vertical frame and the suspension link interfere with each other when the height exceeds a predetermined height, so that the upper limit position is limited, and the leveling rotor cannot be moved much upward.

  Accordingly, there is a problem that when the soil quality of the field is soft and shallow, the leveling rotor enters the soil, stirs the soil, and roughens the field scene. When the field scene is rough, the setting of the planting depth of the seedling planting part is not suitable, and the planting accuracy is deteriorated, the planted seedlings are washed away, and the growth is slow.

  Therefore, the object of the present invention is to prevent interference between the support member of the leveling device and the suspension member of the leveling device when the leveling device moves upward, to improve the planting accuracy and perform appropriate leveling. It is to provide a seedling transplanter equipped with a leveling device.

The above-mentioned problem of the present invention is solved by the following means.
The invention according to claim 1 includes a traveling vehicle body (2) provided with a pair of left and right traveling wheels (12b), auxiliary wheels (12c, 12d) mounted on each traveling wheel (12b), and a traveling vehicle body (2). A seedling planting unit (3) for planting seedlings loaded on the rear, a leveling device (39) for leveling a field scene in which seedlings are planted, and a seedling planting unit (3), A plurality of leveling support members (205) to be supported, a plurality of leveling suspension members (203) for suspending the leveling device (39) so as to be movable up and down on the side of each leveling support member (205), and each leveling support member ( 205) and a lower connecting member (209) for connecting the lower portion of each leveling suspension member (203), the leveling suspension member (203) includes a traveling wheel (12b) Provided between auxiliary wheels (12c, 12d) Each lower connecting member (209) connecting pipe for connecting with each other (217), a seedling transplantation machine which is provided in the lower portion of the lower coupling member (209).

  According to a second aspect of the present invention, the lower connecting member (209) includes a first leveling connecting arm (209a) extending from the leveling support member (205) to the lower rear side of the fuselage and a leveling suspension member (203). L which has a bent portion at the rear upper end portion in a side view when viewed from the side, with a second leveling connection arm (209b) connected to the lower end of the first leveling connection arm (209a). It is a seedling transplanter of Claim 1 made into the shape of a letter.

  According to a third aspect of the present invention, the leveling suspension member (203) is disposed on the front side of the machine body relative to the leveling support member (205), and the leveling suspension member (203) is disposed on the vertical line of the leveling device (39). The seedling transplanter according to claim 1 or 2, wherein the seedling transplanter is arranged in a forward inclined posture.

  According to a fourth aspect of the present invention, there is provided an upper connecting member (207) for connecting an upper portion of each leveling support member (205) and an upper portion of each leveling suspension member (203), and the upper connecting member (207) The seedling transplanter according to any one of claims 1 to 3, wherein the seedling transplanter has a coupling mechanism in which the angle of the crossing line between the upper coupling member (207) and the leveling suspension member (203) is always an acute angle.

  In the invention according to claim 5, the leveling device (39) is provided on each of the central leveling body (39a) provided at the left and right center part of the seedling planting part (3) and the left and right sides of the central leveling body (39a). The side leveling bodies (39b, 39b) are configured by mounting a plurality of leveling bodies (39ba, 39ba) on the rotation shafts (39bb, 39bb). The upper portions of the plurality of leveling support members (205) are attached to the beam frame (213) having a longitudinal direction in the left-right direction provided above the side leveling bodies (39b, 39b) and at the rear of the traveling vehicle body (2), A connection support frame (215) for connecting the lower portions of all the leveling support members (205) is provided, and a plurality of leveling bodies (39ba) of the side leveling bodies (39b, 39b) are provided at the lower ends of the leveling suspension members (203). , 39ba) between the front and The traveling wheels (12b) and the auxiliary wheels (12c, 12d) are respectively arranged on the front side of the leveling bodies (39ba, 39ba), and the auxiliary wheels (12c, 12d) are provided on the left and right outer sides of the traveling wheels (12b). The outer auxiliary wheel (12c) having a smaller diameter than the wheel (12b) and the inner auxiliary wheel (12d) having a smaller diameter than the outer auxiliary wheel (12c) provided on the left and right inner sides of the traveling wheel (12b) are suspended from the ground. The lowering member (203) is formed with a bent portion (203a) extending from the upper and lower sides of the leveling suspension member (203) from the upper side to the lower side from the left and right inner sides to the outer side, and the upper portion is above the leveling member (39ba). The seedling transplanter according to claim 1, wherein the seedling transplanter is configured to be positioned.

  According to invention of Claim 1, when the suspension member (203) of the leveling device (39) is located between the traveling wheel (12b) and the auxiliary wheels (12c, 12d), the seedling planting part (3 ) Can be prevented from interfering with the traveling wheel (12b) when the suspension member is lowered, the breakage of the suspension member (203) is prevented. Moreover, the fall of the seedling planting part (3) is delayed and the planting of the seedling is prevented from being delayed, and the seedling planting accuracy is improved.

  That is, if it interferes with the traveling wheel (12b), the lowering of the seedling planting part (3) is delayed, but since it does not interfere, the lowering is not delayed. For example, even if the end of the suspension member (203) and the end of the traveling wheel (12b) are slightly touched, that is, not touched, the lowering of the seedling planting part (3) is delayed, so seedling planting starts Is delayed. In particular, if the descent of the seedling planting part (3) is delayed after the turn, the planting end position before the turn and the planting start position after the turn will not be side by side, creating a space where seedlings will not be planted. It may be necessary to plant seedlings manually. However, this configuration can prevent such a problem.

  Further, by providing a connecting pipe (217) for connecting the lower connecting members (209) to the lower part of the lower connecting member (209), the connecting pipe (217) and the support member (205) of the leveling device (39) are provided. The distance between the connection pipe (217) can be prevented from coming into contact with the support member (205) when the leveling device (39) is raised by the suspension member (203). ) Is prevented.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the first leveling connection arm (209a) of the lower connection member (209) has a bent portion at the rear upper end in a side view. By adopting the L shape, when the leveling device (39) is lifted by the suspension member (203) and the second leveling connection arm (209b) rotates upward, the second leveling connection arm (209b) is the first. Since the range in which the second leveling connection arm (209b) can be lifted is increased due to difficulty in contact with the leveling connection arm (209a), the leveling device (39) can be moved further upward, and the leveling device (39) It is prevented that the farm field is touched by the farm scene.

  According to the invention described in claim 3, in addition to the effects of the invention described in claim 1 or 2, the suspension member (203) is positioned on the front side of the body relative to the support member (205), so When the device (39) is raised, the suspension member (203) does not interfere with the support member (205) and does not hinder the upward movement of the suspension member (203). It becomes wide and it is prevented that the leveling device (39) touches the field scene and roughens the field.

  Moreover, since the leveling work position of the leveling device (39) can be set further upward by widening the range in which the leveling device (39) can be raised, leveling suitable for the soil quality of the field can be performed, leveling performance and seedling planting Accuracy is improved. For example, if the soil level is soft, setting the working height of the leveling device (39) to a high level can prevent the leveling device (39) from mixing the soil and roughening the field.

  When the suspension member (203) is arranged on the vertical line of the leveling device (39), the vertical leveling is intense because the leveling device (39) rises directly above when pushed upward by an obstacle such as a stone. Become. However, according to the third aspect of the present invention, when the suspending member (203) is disposed in the forward tilted posture, the leveling device (39) is pushed upward by an obstacle such as a stone. ) Easily moves toward the upper front side of the aircraft, so it slowly moves up and down following the obstacle. Accordingly, it is possible to prevent the ground leveling device (39), the suspension member (203) and the like from being loaded and damaged.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the intersection line between the upper connecting member (207) and the suspension member (203) Since the angle is always an acute angle, the load due to the weight of the leveling device (39) and the like can be dispersed even when the leveling device (39) moves upward compared to the case of an obtuse angle, so that the strength can be secured and the load Wear of the rotating shaft portion of the connecting portion between the upper connecting member (207) and the suspension member (203) due to is prevented, and durability is improved.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 1, the traveling wheel (12b), the outer auxiliary wheel (12c) and the front auxiliary wheels (12c) are provided in front of the left and right side leveling bodies (39b, 39b). By arranging the inner auxiliary wheel (12d) and attaching the lower end of the suspension member (203) between the leveling bodies (39ba), the side leveling body (39b) can be stably suspended. Therefore, a decrease in leveling is prevented. That is, the connection position of the suspension member (203) and the leveling body (39ba) is set so as to avoid the position where the travel mark remains due to the traveling of the traveling wheel (12b), the outer auxiliary wheel (12c), and the inner auxiliary wheel (12d). It is arranged. At the connecting position, the leveling action of the leveling body (39ba) is almost eliminated, so that the running trace can remain unbalanced. However, with this configuration, the running trace is leveled by the leveling body (39ba). It becomes arrangement.

  Further, by forming a bent portion (203a) from the upper and lower sides of the suspension member (203) from above to below between the left and right inner sides to the outside, the wheels (12b, 12c, 12d) and the suspension member (203) are formed. Since the distance between them is not uniform, even if the muddy soil lifted from the field by the traveling wheel (12b), the outer auxiliary wheel (12c), and the inner auxiliary wheel (12d) adheres to the suspension member (203), it will easily fall. The mud adhering to the wheels (12b, 12c, 12d) and the mud adhering to the suspension member (203) serve as running resistance, and it is possible to prevent running and operability from deteriorating.

  That is, since the bent portion (203a) is inclined, even if mud is placed, it is easy to slip and mud is likely to fall. Moreover, since mud is hard to adhere to the position apart from the wheels (12b, 12c, 12d) in the bent portion (203a), the mud lump is less likely to adhere to the top and bottom of the suspension member (203), and the weight of the mud The running resistance due to can be kept small.

  In this way, the traveling wheel (12b), the outer auxiliary wheel (12c), and the inner auxiliary wheel (12d) easily fall off even if the mud lifted from the field adheres to the suspension member (203). The mud adhering to 12b, 12c, 12d) and the mud adhering to the suspension member (203) become running resistance, and it is possible to prevent the running performance and operability from being lowered. Further, since it is possible to prevent a load from being applied to the suspension member (203) due to the weight of the mud, wear due to the load of the leveling device (39) or the like is reduced, and durability is improved.

  Further, the auxiliary wheels (12c, 12d) are arranged on the outer side of the traveling wheel (12b) and have a smaller diameter outside auxiliary wheel (12c) and on the inner side of the traveling wheel (12b) and smaller in diameter than the outer auxiliary wheel (12c). (12d) makes it possible to stabilize the posture of the traveling vehicle body (2). Further, the upper part of the leveling support member (205) is attached to the beam frame (213) extending in the left-right direction above the side leveling bodies (39b, 39b), and the connection support frame (215) is attached to the lower part of the leveling support member (205). By providing, the support structure of the leveling device (39) becomes strong, and the leveling device (39) can be supported stably.

It is a side view of the riding type seedling transplanter of the Example of this invention. It is a top view of the riding type seedling transplanter of FIG. It is a principal part side view of a seedling planting part. It is a side view of a seedling planting part. It is a rear view of the seedling removal apparatus of a seedling planting part. It is a side view of the seedling removal apparatus of FIG. It is a transmission mechanism figure of the planting transmission mechanism part of a seedling planting part. It is a back sectional view of a part of planting transmission mechanism part of a seedling planting part. It is a back sectional view of a drive case. FIG. 10 is a cross-sectional view taken along line S1-S1 of FIG. FIG. 10 is a sectional view taken along line S2-S2 of FIG. It is a partial top view of the seedling box used with a seedling transplanter. It is a block diagram of a seedling transplanter. It is a principal part top view of the control part of a seedling transplanter. It is a whole top view of a rotor support structure. FIG. 16 is a partial plan view of FIG. 15. It is a whole side view of a rotor support structure. FIG. 18 is a partial side view (lowermost position) of FIG. 17. It is a partial side view (upmost position) of FIG. It is a side view for demonstrating the assembly | attachment of a beam frame and a rotor support frame. It is a top view for demonstrating the assembly | attachment of a beam frame and a rotor support frame. It is a side view (lowermost position) of the other example of the rotor support structure of a seedling transplanter. It is a side view (upmost position) of the other example of the rotor support structure of a seedling transplanter. It is a side view at the time of changing the shape of a connection support frame. FIG. 25A is a plan view of the connection support frame portion shown in FIG. 17, and FIG. 25B is a plan view of the connection support frame portion shown in FIG. It is a top view of a main transmission lever and a lever guide. FIG. 27 (A) is a side view of the accelerator pedal portion, FIG. 27 (B) is a plan view of the accelerator pedal portion, and FIG. 27 (C) is an upper portion of the accelerator pedal. It is a rear view of a plate and a lower plate part. FIG. 28A is a side view of the accelerator pedal portion, and FIG. 28B is a plan view of the accelerator pedal portion when the accelerator pedal is depressed. It is a figure of the subtransmission lever part of the control part of a seedling transplanter. It is a transmission mechanism figure (cross-sectional development view) of HST in a transmission case and a subtransmission. It is a principal part top view of the seedling transplanting machine at the time of using a winch. It is another example of the auxiliary transmission lever part of the control part of a seedling transplanter. It is another example of the auxiliary transmission lever part of the control part of a seedling transplanter. It is another example of the transmission mechanism figure (cross-sectional development view) of HST in a transmission case and a subtransmission.

  Below, the seedling transplanter concerning the embodiment of the present invention is explained in detail based on a drawing. Note that the present invention is not limited to these embodiments. Further, in this specification, the forward direction of the seedling transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.

  FIG. 1 shows a side view of a riding seedling transplanter according to an embodiment of the present invention, and FIG. 2 shows a plan view of the riding seedling transplanter shown in FIG. In FIG. 3, the principal part of the seedling planting part of the seedling transplanter of a present Example is shown, and the side view of the seedling planting part of the seedling transplanter of a present Example is shown in FIG. In FIG. 5, the rear view of the seedling removal apparatus of the seedling transplanting part of the seedling transplanting machine of a present Example is shown, and the side view of the seedling removal apparatus of FIG. 5 is shown in FIG. FIG. 7 shows a transmission mechanism diagram of the planting transmission mechanism section of the seedling transplanting section of the seedling transplanting machine of the present embodiment, and FIG. 8 shows planting of the seedling transplanting section of the seedling transplanting apparatus of the present embodiment. The back sectional drawing of a part of transmission mechanism part is shown. 9 shows a back sectional view of the drive case, FIG. 10 shows a sectional view taken along line S1-S1 of FIG. 9, and FIG. 11 shows a sectional view taken along line S2-S2 of FIG. FIG. 12 shows a plan view of a part of a seedling box used in the seedling transplanter of this embodiment, and FIG. 13 shows a block diagram showing a partial configuration of the seedling transplanter of this embodiment.

  The seedling transplanter 1 according to the embodiment is for planting a pot seedling N (shown in FIGS. 5 and 6) accommodated in a seedling box C shown in FIG. 12 in a field. The seedling box C is made of an elastic material such as rubber and is formed in a mat shape. The seedling box C is provided with a plurality of cylindrical pots C1 for storing the pot seedlings N. When the seedling box C is loaded on the pot seedling placement unit 24 of the seedling planting unit 3, a plurality of pots C1 are arranged in the left-right direction. A plurality of pots C1 arranged in the left-right direction constitute a growing row C2. A plurality of growth rows C2 are provided in the front-rear direction, that is, in the moving direction of the seedling box C in the pot seedling placement unit 24.

  As shown in FIGS. 1 and 2, the seedling transplanter 1 includes a traveling vehicle body 2, a seedling planting unit 3 attached to the rear part (rear side) of the traveling vehicle body 2, and a power transmission mechanism (such as the transmission case 21 and the HST 302). ), Leveling device 6, control device 5 (FIG. 13), and the like.

  The traveling vehicle body 2 includes four wheels 12 including a pair of left and right front wheels 12a and 12a for traveling and a pair of left and right rear wheels (traveling wheels) 12b and 12b. The four wheels 12 serve as driving wheels. It is a wheel drive vehicle. The left and right rear wheels 12b, 12b are provided with plate-like lugs that are wider than the left and right widths of the rear wheels 12b at predetermined intervals on the outer peripheral edge in order to increase the propulsive force generated when contacting the farm scene. Yes.

  However, in fields such as wetlands where the resistance of mud is very large and traveling is likely to be hindered, stable driving may not be possible even if four-wheel drive is used and the rear wheel 12b includes a lug body. In order to solve this problem, first auxiliary wheels (outer auxiliary wheels) 12c and 12c having a slightly smaller diameter than the rear wheels 12b are detachably provided on the outer sides of the left and right rear wheels 12b and 12b. . Furthermore, second auxiliary wheels (inner auxiliary wheels) 12d, 12d having a smaller diameter than the first auxiliary wheels 12c, 12c are detachably provided on the inner sides of the left and right rear wheels 12b, 12b. 12b and the left and right first auxiliary wheels 12c, 12c are grounded when they sink, so that the posture of the traveling vehicle body 2 is stabilized.

  The second auxiliary wheels 12d and 12d are in close contact with the left and right rear wheel gear cases 12g and 12g transmitting the driving force to the left and right rear wheels 12b and 12b as much as possible, and the rear wheel 12b and the first auxiliary wheel 12c and the like are as much as possible. The structure does not approach the outside.

  As shown in FIG. 1, the traveling vehicle body 2 includes a main frame 10 and an engine 11 mounted on the main frame 10. In this seedling transplanting machine 1, the driving force of the engine 11 is used not only for moving the traveling vehicle body 2 forward or backward, but also for driving the seedling transplanting unit 3.

  The engine 11 is a heat engine such as a diesel engine or a gasoline engine, and outputs driving force from an output shaft. The output shaft protrudes from the left side of the traveling vehicle body 2. The engine 11 is disposed at a substantially central position in the left-right direction of the traveling vehicle body 2 and protruding upward from a floor step 13a on which an operator places his / her foot when getting on. At this time, the output shaft of the engine 11 is located below the floor surface of the floor step 13a.

  Here, the floor step 13 a is provided between the front part (front side) of the traveling vehicle body 2 and the rear part (rear side) of the engine 11, and is mounted on the main frame 10. A part of the floor step 13a has a lattice shape, and the mud attached to the shoes can be dropped onto the field. A rear step 13b that also serves as a fender for the rear wheels 12b and 12b is provided behind the floor step 13a. The rear step 13 b has an inclined surface that is inclined upward as it goes rearward, and is disposed on each of the left and right sides of the engine 11.

  The engine 11 protrudes upward from the floor step 13a and the rear step 13b, and an engine cover 14 that covers the engine 11 is disposed in a portion protruding from these steps. That is, the engine cover 14 covers the engine 11 in a state of protruding upward from the floor step 13a and the rear step 13b.

  The traveling vehicle body 2 is provided with a cockpit 15 above the engine cover 14, and a front cover 16 is disposed in front of the cockpit 15 and in front of the traveling vehicle body 2. . The front cover 16 is disposed in a state of protruding upward from the floor surface of the floor step 13a, and divides the front side of the floor step 13a into left and right.

  Inside the front cover 16 are disposed a control device 5, an operation device such as an operation panel, a steering mechanism, a fuel tank for engine fuel, and the like. Various operation levers, instruments, and a handle 17 are disposed on the front cover 16. The handle 17 is provided as a steering member for steering and steering the front wheels 12a and 12a when the operator rotates, and the front wheels 12a and 12a are steered (rotated) via a steering mechanism or the like in the front cover 16. Rudder).

Further, as various operation levers provided on the upper portion of the front cover 16, a main transmission lever 303 (FIG. 14) for switching forward / backward, forward stop, and moving speed of the traveling vehicle body 2 is disposed.
Further, as various operation levers provided on the lower inner side of the front cover 16, a “road traveling mode” in which the traveling vehicle body 2 travels on the road and a “work traveling mode” in which seedlings are planted in the field while the traveling vehicle body 2 travels. A sub-transmission operation lever 313 and the like for switching between and the like are provided.

  In addition, a spare seedling frame 18 on which a replenishing seedling box C and the like are placed is disposed at portions of the floor step 13a located on the left and right sides of the front cover 16, respectively. The preliminary seedling frame 18 includes a plurality of preliminary seedling mounting bases 18a on which a supplementary seedling box C and the like are placed in the vertical direction. In addition, a drawing marker 19 is provided on each of the left and right sides of the front cover 16 of the traveling vehicle body 2.

  In addition, a fertilizer application device 20 (FIGS. 1 and 2) is provided behind the cockpit 15 of the traveling vehicle body 2. The fertilizer application apparatus 20 discharges the granular fertilizer stored in the fertilizer hopper 20a to the field by a certain amount during planting work.

The power transmission mechanism includes a mission case 21 installed at the front portion of the main frame 10. Rear wheel gear cases 12g and 12g are supported in a freely rolling manner by using a rear wheel rolling shaft (not shown) provided horizontally at the rear left and right center of the main frame 10 as a fulcrum, and outward from the rear wheel gear cases 12g and 12g. The rear wheels 12b and 12b are attached to the rear wheel axle 12x that protrudes toward the rear. The driving force of the engine 11 is configured to be transmitted to the transmission case 21 via a first belt transmission device (not shown) and a second belt transmission device (not shown).
The driving force shifted by the mission in the mission case 21 is transmitted to the front wheels 12a and the rear wheels 12b, and is transmitted to the seedling planting portion 3 via a transmission shaft, an intermediate gear case, and the like.

  In the present embodiment, the seedling planting unit 3 has an eight-row planting structure and is provided at the rear part of the traveling vehicle body 2 by a lifting mechanism 22 of the seedling planting unit 3 so as to be movable up and down. The raising / lowering mechanism 22 of the seedling planting unit 3 includes an elevation link mechanism 22a and a lifting cylinder 22b, and the seedling planting unit 3 is attached to the traveling vehicle body 2 via the elevation link mechanism 22a. . The lifting link mechanism 22 a has an upper link and a lower link that connect the rear portion of the traveling vehicle body 2 and the seedling planting portion 3, and these links are erected on the rear end of the main frame 10. It is connected to the gate-shaped link base frame 23 so as to be rotatable, and the other end of each link is rotatably connected to the seedling planting part 3 so that the seedling planting part 3 can be moved up and down and connected to the traveling vehicle body 2. doing. The raising / lowering cylinder 22b expands / contracts the rod, rotates the link, and moves the seedling planting part 3 up and down.

  As shown in FIGS. 3 and 4, the seedling planting unit 3 includes a pot seedling placement unit 24, a seedling box transport device 32, a seedling extraction device 33 (FIG. 11), a seedling transport device 34, and seedling removal The apparatus 35, the seedling horizontal feed apparatus 36, the seedling planting apparatus 37, the planting transmission mechanism part 25 (FIG. 7), etc. are provided. In addition, the seedling planting unit 3 is configured integrally with a drive case 41 and a planting transmission frame 45. Note that the pot seedling placement unit 24, the seedling box transport device 32, the seedling extraction device 33, the seedling transport device 34, the seedling removal device 35, the seedling lateral feed device 36, and the seedling planting device 37 are 1 A plurality of these corresponding ones are provided in a one-to-one correspondence, and two corresponding pot seedlings N are planted in the field with the corresponding ones.

  Further, a unit constituted by the pot seedling placement unit 24, the seedling box transport device 32, the seedling extraction device 33, the seedling transport device 34, the seedling removal device 35, the seedling lateral feed device 36, and the seedling planting device 37 is set in the left-right direction. Are arranged side by side. In the present embodiment, a unit including a pot seedling placement unit 24, a seedling box transport device 32, a seedling extraction device 33, a seedling transport device 34, a seedling removal device 35, a seedling lateral feed device 36, and a seedling planting device 37. There are a total of four.

  The pot seedling placement unit 24 is provided at the rear part of the traveling vehicle body 2 and carries a seedling box C containing a plurality of pot seedlings N. As shown in FIG. 4 and the like, the pot seedling placement section 24 is provided with four sets of upper and lower two-stage pot seedling box introduction sections 30 and 30 that are inclined in a shared rearward manner by two adjacent strips. The seedling box main transport paths 31, 31 are connected to the rear end portions of the pot seedling box introduction sections 30, 30 of each set to transfer the seedling box C. The upper and lower two-stage pot seedling box introducing portions 30 and 30 are supported via a seedling support base frame 46 extending upward from the drive case 41.

  The seedling box main transport path 31 transports the seedling boxes C supplied one by one in order from the upper and lower pot seedling box introduction sections 30 and 30 downward in the first half, and gradually advances the transport direction along the arc from the middle. On the other hand, the latter half is formed in a substantially U shape in a side view for conveying upward.

  The rear end portion of the seedling box main transport path 31 is provided with an empty box storage portion 27 that can store a plurality of empty seedling boxes C after the seedlings are taken out at the seedling extraction position in a stacked state. It has been. The seedling box main transport path 31 is provided with a seedling box supply device 29 by supply rollers 29a and 29b for sending out the seedling box C in the pot seedling box introduction section 30, and the placed seedling box C is introduced into the pot seedling box C The idling roller 29c on the bottom surface of the portions 30 and 30 slides backward with its own weight along the inclination.

  The seedling box supply device 29 is provided at the rear end of the pot seedling introduction unit 30. The seedling box supply device 29 includes a pair of left and right supply rollers 29a and 29b that grip the left and right edges of the seedling box C and feed the seedling box C to the seedling box main transport path 31 side, and forward of the supply rollers 29a and 29b. A wide feed roller 29d for feeding the seedling box C with a protrusion formed on the outer peripheral portion engaged with a gap between the pot C1 and the pot C1 from below is provided. The supply roller 29b and the feed roller 29d are rotationally driven by motors M1 and M2, respectively.

  The seedling box transport device 32 intermittently transfers the seedling box C loaded on the pot seedling placement unit 24 to the seedling planting device 37 (that is, the empty box housing unit 27 side) for each pot seedling of one growth row C2. It will be sent out. The seedling box C is finally moved to the empty box housing portion 27, and the seedling is taken out from the seedling box C so that the seedling moves to the seedling planting device 37 on the way. That is, it becomes an empty box on the way.

  As shown in FIG. 3, the seedling box transport device 32 is provided in the seedling box main transport path 31 and includes a pair of left and right seedling feed rotating members 60 and 60 and locking claws 61 and 61. The seedling feed rotation members 60 and 60 rotate in conjunction with the traveling of the traveling vehicle body 2 to intermittently send the seedling box C to the empty box housing portion 27 side. The seedling feed rotation members 60, 60 reciprocate up and down along the seedling box main transport path 31, and are drilled at the left and right edges of the seedling box C at the same pitch as the pitch of the pot C1. Engage with the square hole C3 (see FIG. 12) for feeding the seedling box, and when moving upward, the engagement with the square hole C3 is disengaged and the operation is carried over to the next square hole C3.

  The locking claws 61, 61 are interlocked with the operation of the seedling feeding rotation members 60, 60. When the seedling feeding rotation members 60, 60 are moved downward, they are disengaged from the square hole C3, and the seedling feeding rotation members 60, 60 are engaged. When is moved upward, it is configured to engage with the square hole C3 to support the seedling box. By the operation of these seedling feeding rotation members 60 and 60 and the locking claws 61 and 61, the seedling box C is arranged along the seedling box main transport path 31 by one pitch of the growing row C2 in which the pot C1 is arranged. It is sent intermittently.

  The feeding operation of the seedling box transport device 32 is performed when the seedling pushing pin 72 (FIG. 11) of the seedling extraction device 33 is not inserted into the pot C1 of the seedling box C. In addition, on the upper side of the feeding of the seedling feed rotation members 60, 60 and the latching claws 61, 61, the seedling box owner is interlocked with the latching claws 61, 61 coming out of the square hole C3 of the preceding seedling box C. Blocking claws 63, 63 are provided which protrude into the transport path 31 and temporarily receive the succeeding seedling box C sliding down the seedling box main transport path 31.

  As shown in FIG. 10, the operation mechanism of the seedling box transport device 32 is provided with a seedling box feed cam 65 on a first transmission shaft 64 that penetrates the upper part of the drive case 41, and is rotatably supported by a seedling box operating arm 66. The seedling box operating arm 66 is biased by a spring 68 so that the roller 67 is always brought into contact with the outer peripheral surface of the cam 65. The rotation of the seedling box feeding cam 65 causes the seedling box operating arm 66 to swing, and the swinging of the seedling box operating arm 66 is transmitted to the seedling box feeding driving arms 70, 70 via the seedling box feeding driving shaft 69, The seedling feed rotating members 60, 60 are reciprocated up and down. The cam 65 is configured to feed the seedling box C by moving the rotating members 60 and 60 up and down by repeating contact and non-contact with the roller 67.

  The seedling extraction device 33 (FIG. 11) extracts the pot seedling N from the pot C1 of the seedling box C at the seedling extraction position P (FIG. 3 etc.). In the seedling extraction device 33, seedling pushing pins 72 (FIG. 11) arranged at the same number and pitch with respect to the pots C1 arranged in the left-right direction constituting the growing row C2 of the seedling box C are supported slidably in the front-rear direction. The left and right slide shafts 73 and 73 are provided so as to operate integrally. A rack 73a is formed on the slide shaft 73, and the first sector gear 74 in the drive case 41 is engaged with the rack 73a.

  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 rotation of the seedling extraction cam 81 causes the slide shafts 73 and 73 to slide back and forth, and when the slide shafts 73 and 73 slide rearward, the seedling pushing pins 72 are for one row of the seedling box C in the seedling extraction position P. With respect to the pot C1 of the growing row C2, it is inserted into the pot C1 through the break at the bottom of the pot C1, and the pot seedling N is pushed backward. The seedling box feed cam 65 and the seedling extraction cam 81 are integrally formed with a common cylinder 64 a that is rotatably fitted to the first transmission shaft 64.

  The seedling conveying device 34 conveys the pot seedling N taken out by the seedling extracting device 33 toward the seedling removing device 35 with a trajectory that draws an arc on the lower front side. The seedling transport device 34 includes a seedling holder 83 that holds the floor soil portion N1 (FIG. 6) of the pot seedling N pushed out from the pot C1 of the seedling box C by the seedling pushing pin 72.

  As shown in FIG. 3, the seedling holder 83 has left and right ends fixed to support members 86 and 86 connected to the upper and lower swing links 84 and 85, respectively. It is designed to reciprocate by drawing an arc locus by the movement. As shown in FIG. 8, the seedling conveying device 34 transmits the rotation of the first transmission shaft 64 to the input shaft 92 of the seedling conveying transmission case 91 through the arm 88, the telescopic rod 89 and the arm 90 as a repetitive rotational motion. In addition, the revolving 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.

  The seedling removing device 35 extracts the pot seedling N from the seedling conveying device 34. As shown in FIGS. 5 and 6, the seedling removal device 35 includes a comb-shaped seedling tapping 100 that can pass through the seedling holder 83 forward and backward. 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 via 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 beating cam 106 is rotated, when the roller 104 is fitted into the concave portion 106a of the seedling beating cam 106, the seedling beating 100 is quickly rotated downward by the tension of the spring 107, and immediately returns to its original position.

  When the seedling holder 83 has moved to the lower end of the movement locus, the seedling removal device 35 receives the pot seedling N held by the seedling holder 83 by the seedling hitting 100 and passes only the seedling holder 83 to extract the pot seedling N. . Then, the seedling hitting 100 rotates downward, and the extracted pot seedling N is knocked down onto the seedling feeding belts 113, 113 of the seedling lateral feeding device 36.

  The seedling lateral feed device 36 feeds the pot seedlings N for the growing row C21 extracted by the seedling removal device 35 to the left and right sides in half. As shown in FIG. 5, the seedling lateral feed device 36 includes a pair of left and right wound around a drive roller 111 of a seedling lateral feed drive shaft 110 and a driven roller 112 that are installed on a main frame (not shown) of the seedling planting unit 3. The seedling feeding belts 113 and 113 are provided symmetrically so as to move to the left and right outer sides, respectively.

  On the lower side of the lateral feed portion of the seedling feeding belts 113, 113, a deflection preventing plate 114 is provided to prevent the seedling feeding belts 113, 113 from being chewed by the weight of the pot seedling N falling. The pot seedlings N for one row of the growing row C2 removed by the seedling removal device 35 are aligned and dropped on the seedling feeding belts 113, 113, and the seedling feeding belts 113, 113 that have received the seedling feeding belts 113, 113 receive left and right half halves. Transport the seedlings to the left and right sides respectively. The seedling N conveyed by the seedling feeding belt 113 is dropped between the pair of planting guides 115 and 115.

  The seedling planting device 37 takes out the pot seedlings N that are taken out by the seedling extracting device 33 and supplied by the seedling lateral feeding device 36 and are planted in the field. As shown in FIG. 3, the seedling planting device 37 includes a pair of seedling transplanters 122 and 122 in a rotating case 121 that rotates integrally with a planting drive shaft 120 provided at the rear end of the planting transmission frame 45. It is attached. When the planting drive shaft 120 rotates, the seedling transplanters 122 and 122 move in a closed loop tip locus. Each seedling transplanter 122 alternately takes one pot seedling N dropped between the planting guides 115, 115, and moves it between the planting guides 115, 115 to plant it in the field.

  In the planting transmission mechanism 25, as shown in FIG. 7, an input shaft 130 to which driving force is transmitted from the traveling vehicle body 2 is interlocked and connected to the second transmission shaft 133 via bevel gears 131 and 132. The second transmission shaft 133 transmits a driving force to the seedling lateral feed drive shaft 110 of each strip through eight sets of bevel gears 135 and 136. A pair of adjacent seedling transverse feed drive shafts 110, 110 rotate in opposite directions.

  Further, in each planting transmission frame 45, a transmission chain 137 is provided that spans a sprocket 137a attached to the second transmission shaft 133 and a sprocket 137b attached to the planting drive shaft 120. A driving force is transmitted from the second transmission shaft 133 to the planting drive shaft 120 by the transmission chain 137.

  Further, as shown in FIGS. 7 and 8, the second transmission shaft 133 is interlocked with the lower ends of the two left and right upper and lower transmission shafts 142 via bevel gears 140 and 141 at the outer end thereof. . The upper end of the left vertical transmission shaft 142 is linked to the first transmission shaft 64 for the first unit and the second unit via the bevel gears 143 and 144, and the middle portion thereof is connected via the bevel gears 147 and 148. It is linked to the seedling hitting cam shaft 105 for the first unit and the second unit. Similarly, the right vertical transmission shaft 142 is connected to the first transmission shaft 64 for the third unit and the fourth unit and the seeding cam shaft 105 in an interlocking manner.

  Further, as shown in FIGS. 1 and 2, below the seedling planting portion 3, there is provided a float 38 that slides on the farm field to level the ground as the traveling vehicle body 2 moves. The float 38 includes a pair of left and right outer floats (first leveling members) 38o, 38o provided at the lower left and right sides of the seedling planting portion 3, and a pair of left and right inner sides provided between the left and right of the left and right outer floats 38o, 38o. It is composed of a total of four floats (second leveling members) 38i, 38i.

  The left and right outer floats 38o, 38o and the left and right inner floats 38i, 38i are respectively arranged at predetermined intervals in the left-right direction, and the rear wheels 12b, 12b and the planting transmission frame 45 of the second seedling planting device 37, 37 from the outside of the machine body are located.

  An elevation angle sensor (potentiometer) 43 that detects the amount of rotation when passing through the unevenness of the field is provided on the rotation axis of the left and right inner floats 38i, 38i, and when the rotation angle detected by the elevation angle sensor 43 changes, A solenoid valve (not shown) is opened and closed to expand and contract the elevating cylinder 22b, and the planting work height of the seedling planting unit 3 is automatically moved up and down to align the seedling planting depth.

  However, the appropriate planting depth varies depending on the soil quality of the field, etc. If the seedling planting part 3 is raised and lowered by a certain amount, the seedling planting depth is disturbed and the seedling growth is poor. May be. For example, in a soft soil field, the planting depth is likely to be disturbed if the seedling planting part 3 is not raised or lowered even with a slight angle change. Conversely, in a hard field, the seedling planting part 3 is only when there is a large angle change. Otherwise, the seedling planting part 3 will frequently move up and down, the aircraft will shake, the working height of the seedling planting part 3 will change before planting seedlings, and the planting depth will be inappropriate There is a problem.

  In order to solve this problem, as shown in the plan view of the main part of the control unit in FIG. 14, the detection angle of the elevation sensor 43 (FIG. 13) that raises and lowers the seedling planting unit 3 is mounted on the front cover 16 of the traveling vehicle body 2. A sensitivity adjustment dial 300 is provided to correct the above. When the sensitivity adjustment dial 300 is operated to the “soft” side, it becomes sensitive. When the elevation angle sensor 43 detects even a slight rotation angle, the seedling planting part 3 is raised and lowered, and when operated to the “hard” side, it becomes insensitive. Only when the elevation sensor 43 detects a large angle, the seedling planting unit 3 is moved up and down.

Thereby, since an appropriate planting depth can be maintained according to the soil quality of a field, growth of a seedling is stabilized.
However, the above-described automatic lifting mechanism is not necessary when the operator manually performs the lifting operation according to the work position without using the automatic lifting of the seedling planting unit 3. Therefore, even if the elevation sensor 43 detects the rotation of the left and right inner floats 38i, 38i, a “hydraulic lock” position is set in which the electromagnetic valve is not operated.

  In addition to the sensitivity adjustment dial 300, the cover 16 is provided with an accelerator operation dial 301 for increasing or decreasing the engine speed. The accelerator operation dial 301 is disposed on the front side of the aircraft with respect to the sensitivity adjustment dial 300 and on the inner side of the aircraft with respect to the main transmission lever (HST lever) 303 for operating the output and forward / reverse travel of the HST (hydraulic continuously variable transmission) 302. To do.

  With the above configuration, since no other adjustment member is arranged on the front side of the aircraft from the accelerator operation dial 301, it becomes difficult for the operator to touch other adjustment members when operating the accelerator operation dial 301, and setting changes not intended by the operator can be made. It does not occur and the work efficiency and seedling planting accuracy are improved.

  Further, the leveling device 6 is provided below the seedling planting unit 3 and in front of the float 38 to level the field. The leveling device 6 includes one or more rotors 39 (39a, 39b) that are rotated by a driving force from the engine 11.

  The control device 5 controls each of the above-described components constituting the seedling transplanter 1. The control device 5 performs, for example, a shift control for controlling the mission, a lifting control of the seedling planting unit 3 by the lifting mechanism 22, an engine control for controlling the engine 11, a planting control of the pot seedling N of the seedling planting unit 3, and the like. Running.

  In the seedling transplanter 1, when the pot seedling N is planted in the field, the raising and lowering mechanism 22 lowers the seedling planting unit 3 to the ground work position (the pot seedling N planting position). In the seedling transplanter 1, the rotor 39 and the float 38 of the leveling device 6 level the surface of the field while traveling in the field. And the seedling transplanter 1 plants the pot seedling N in the field while rotating integrally with the rotation case 121 and the planting drive shaft 120 of the seedling planting device 37 of the seedling planting unit 3.

  In addition, when the seedling transplanter 1 finishes planting the seedling in the field, the seedling planting unit 3 is raised to the non-working position by the lifting mechanism 22 of the seedling planting unit 3. And the seedling transplanter 1 moves between farm fields or moves outside the farm fields.

  15 shows an overall plan view of the rotor support structure, FIG. 16 shows a partial plan view of FIG. 15, FIG. 17 shows an overall side view of the rotor support structure, and FIGS. Shows a partial side view of FIG. 18 shows a diagram when the rotor device is lowered to the lowest position, and FIG. 19 shows a diagram when the rotor device is raised to the highest position.

Here, a specific example of the entire configuration of the rotor device will be described again.
The leveling device 6 is composed of a center rotor (center leveling body) 39a provided at the left and right center part of the seedling planting unit 3, and side rotors (side side leveling body) 39b provided on the left and right sides of the center rotor 39a, respectively. The center rotor 39a and the side rotor 39b are configured by mounting a plurality of rotor blades (leveling bodies) 39aa and 39ba on the rotor rotation shafts 39ab and 39bb.

  Further, power is transmitted from the gear in the rear wheel gear case 12g to the rotor rotating shaft 39bb of the left side rotor 39b via the rotor transmission shaft 40 and the like, and further, the rotor rotating shaft 39ab of the center rotor 39a and the right side rotor 39b are connected. Power is transmitted to the rotor rotating shaft 39bb from a pair of chains (not shown) in the rotor transmission cases 150 and 150. The leveling device 6 rolls around the fulcrum S by the rolling mechanism K.

  As shown in FIG. 15, a rolling frame 160 that is a part of the seedling planting portion 3 is connected to the rear end portion of the elevating link mechanism 22 a and is supported so as to be able to roll around the longitudinal axis S.

  The rolling mechanism K includes a gear mechanism and a motor 164 that pushes and pulls a pair of rolling springs 162 and 162 that are pushed and pulled in the left-right direction, and a rolling potentiometer 166 that detects the movement thereof. By pushing and pulling the rolling spring 162 of the rolling mechanism K, the seedling planting device 37 is driven to roll around the front and rear axis S at the rear lower part of the lifting link mechanism 22a.

  Then, the front and rear of the center rotor 39a and the side rotor 39b are respectively provided with a suspension spring 201 and a rotor holder (suspending member) 203 that are supported from above, and the rotor is erected at the rear end portion of the lifting mechanism 22 The support frame (leveling support member) 205 supports the height adjustment at a position below the seedling planting portion 3.

  20 and 21 are schematic views of the main part for explaining the assembly of the beam frame 213 and the rotor support frame 205. FIG. FIG. 20A shows a side view before assembly, and FIG. 20B shows a side view after assembly. Further, the left side of FIG. 21 (plan view) shows the state before assembly, and the right side shows the state after assembly.

  The rotor support frame 205 is suspended from the beam frame 213, and an attachment stay 218 of the beam frame 213 having a longitudinal direction in the left-right direction and an attachment 225 at the top of the rotor support frame 205 are indicated by an attachment line 219. In addition, a large frame of the planting frame 214 is formed by mounting the mounting stay 218 and the mounting hole 227 of the mounting tool 225 using the bolt 230 and the nut 231.

  The support structure for the center rotor 39a and the side rotor 39b will be described. The rotor holder 203 includes a rotating connecting arm (upper connecting member) 207 that is loosely connected to the upper portion thereof, and a rotor arm (lower connecting member) 209 that is also connected to the lower portion. Are connected to the rotor support frame 205 so as to be movable up and down, and an adjustment lever 211 that can be swung as an operating tool is connected to the rotation connecting arm 207 so that the height can be adjusted. That is, the upper portion of the rotor arm 209 is rotatably connected to a connection support frame 215 that connects the lower portions of the rotor support frames 205, and the side rotor 39b is rotatably connected to the lower portion of the rotor arm 209. . Further, the rotation connecting arm 207 has one end rotatably connected to the upper rotation connecting arm 207a whose one end is fixed to the beam frame 213, and the other end of the upper rotation connecting arm 207a. Consists of a lower rotation connecting arm 207b fixed to the upper end of the rotor holder 203.

  In addition, the rotor arm 209 has one end that is rotatable at the other end of the upper rotor arm 209a and the upper rotor arm 209a whose one end is rotatably connected to the connection support frame 215. The lower rotor arm (second leveling connection arm) 209b is connected and the other end is rotatably connected to the rotor support member 221 of the side rotor 39b. A lower portion of the rotor holder 203 is rotatably connected to the rotor support member 221.

  The adjusting lever 211 is connected (welded) to the upper rotating connecting arm 207a on the front side of the beam frame 213. When the adjusting lever 211 is turned in the direction of arrow A (FIG. 18), the upper rotating connecting arm 207a is connected to the beam frame 213a. Rotating in the direction of arrow B about 213, and accordingly, the rotor holder 203 whose upper end is fixed to the lower rotation connecting arm 207 b is moved upward, and the rotor 39 is moved with respect to the field L through the rotor support member 221. Rises. In other words, the adjustment lever 211 is used to raise or lower the upper rotation connecting arm 207a.

  Specifically, the planting frame 214 includes a beam frame 213, a rotor holder 203, a rotor support frame 205, a rotation connecting arm 207, a rotor arm 209, a rolling frame 160, and the like.

  The link receiving frame 161 of the rolling frame 160 is connected to the lifting link mechanism 22a, and the seedling planting unit 3 lifts and lowers the lifting mechanism 22 via the rolling mechanism K (rolling frame 160) and the extension frame 9 (FIG. 1). The link mechanism 22a is detachably attached to the rear part.

  The rotor holder 203 is disposed between the rear wheel 12b and the first auxiliary wheel 12c, and between the rear wheel 12b and the second auxiliary wheel 12d. Does not interfere. Therefore, damage to the rotor holder 203 is prevented. Moreover, it is prevented that the seedling planting part 3 descends and the seedling planting is delayed, and the seedling planting accuracy is improved.

  Further, the rotor holder 203 is arranged behind the rotor support frame 205 so that the rotor 39 does not approach the wheel even when the rotor 39 moves up and down. That is, since the rotor 39 is suspended, the rotor 39 may swing back and forth when the seedling planting unit 3 is lifted. However, with the above configuration, interference between the rotor 39 and the rear wheel 12b, the first auxiliary wheel 12c, and the second auxiliary wheel 12d can be prevented. Moreover, the rotor holder 203 can prevent interference with these wheels by arrange | positioning back rather than the rear wheel 12b, the 1st auxiliary wheel 12c, and the 2nd auxiliary wheel 12d.

  The rotor holder 203 is formed with a bent portion 203 a (FIG. 16) that extends from the upper and lower sides of the rotor holder 203 from the upper side to the lower side toward the outer side from the left and right inner sides of the machine body. By increasing the bending of the bent portion 203a, the rear wheel 12b, the first auxiliary wheel 12c, and the second auxiliary wheel 12d can be easily removed even if mud soil lifted from the field is attached. Since the bent portion 203a is inclined, it is easy to slip even if mud is placed, and mud tends to fall. In addition, mud is not easily attached to the bent portion 203a at a position away from the wheel, so that mud lump is less likely to adhere to the top and bottom of the rotor holder 203, and traveling resistance due to mud weight can be kept small.

  Accordingly, it is possible to prevent the mud adhering to these wheels and the mud adhering to the rotor holder 203 from becoming running resistance and lowering the running performance and operability. Further, since the load on the rotor holder 203 can be prevented by the weight of the mud, wear due to the load of the rotor 39 and the like is reduced, and the durability is improved.

  The plurality of rotor arms 209 have their lower portions connected by a connecting pipe 217. Thereby, each rotor arm 209 does not swing unnecessarily, and the movement is stabilized. Specifically, a connecting pipe 217 is rotatably connected to a portion below the longitudinal center line N (FIG. 18) of the lower rotor arm 209b. Since the front end portion of the lower rotor arm 209b is connected to the lower portion of the rotor holder 203, the rear end portion (connection to the upper rotor arm 209a is interlocked with the upward movement of the rotor holder 203 as shown in FIGS. Part) as a fulcrum.

  At this time, when the connecting pipe 217 is arranged above the longitudinal center line N of the lower rotor arm 209b, the distance between the rotor support frame 205 and the connecting pipe 217 is reduced, but by arranging it as low as possible. Interference with the rotor support frame 205 can be prevented.

  Then, as shown in FIGS. 18 and 19, the upper rotation connecting arm 207a and the lower rotation connecting arm 207b are connected so as to have an acute angle (90 ° or less). When the upper rotation connecting arm 207a is rotated by the operation of the adjusting lever 211 from the lowest position of the rotor 39, the crossing angle θ is decreased. Therefore, the connecting mechanism is configured such that θ at the lowest position of the rotor 39 is an acute angle. It ’s fine.

  Since the lower rotary connecting arm 207b is fixed on the extended line of the upper end portion of the rotor holder 203, the crossing angle between the upper rotary connecting arm 207a and the rotor holder 203 is also an acute angle, so that strength is ensured. That is, even if the rotor 39 moves up, the load due to the weight of the rotor 39 and the like can be dispersed (truss structure in which the crossing angle between the two sides is an acute angle), so that the strength can be ensured and the rotation connecting arm 207 by the load can be secured. Wear of the rotating shaft portion (the connecting portion between the upper rotating connecting arm 207a and the lower rotating connecting arm 207b) is prevented, and durability is improved.

  22 and 23 show another example (side view) of the rotor support structure of the seedling transplanter 1. FIG. 22 shows a diagram when the rotor device is lowered to the lowest position, and FIG. 23 shows a diagram when the rotor device is raised to the highest position.

  In this example, the upper rotor arm 209a is L-shaped in a side view. When the lower rotor arm 209b is rotated upward by the raising of the rotor holder 203, the upper rotor arm 209a has an arc shape in a side view because of the space Q of the L-shaped opening of the upper rotor arm 209a Compared to (FIG. 17), the range in which the lower rotor arm 209b can be raised is further widened.

  Normally, when the seedling planting part 3 is raised, the leveling device 6 is separated from the field scene. However, in this leveling device 6, the center rotor 39a protrudes forward from the left and right side rotors 39b, so it is necessary to suspend with a spring or the like. is there. However, the center rotor 39a may not be sufficiently lifted upward due to factors such as the aging force of the spring being weakened due to deterioration over time, and the spring may come into contact with the field scene. In particular, when the seedling planting part 3 is raised and turned, when the seedling planting part 3 is in a low position, the rotor 39 comes into contact with the ground at the field end, leaving a contact mark, and finally at the field end. When planting seedlings, planting depth may be disturbed.

  However, by making the upper rotor arm 209a L-shaped in a side view, the rotor 39 can be moved further upward, and the rotor 39 can be prevented from coming into contact with the farm scene and ruining the farm field.

  In the seedling transplanting machine of the present embodiment, the rotor holder 203 is arranged in a forward leaning posture. However, in the examples shown in FIGS. 22 and 23, the rotor holder 203 is put in a forward leaning posture more than the case shown in FIG. Specifically, the lower portion of the rotor holder 203 is inclined forward with respect to the vertical line E of the side rotor 39b.

  When the rotor 39 is pushed upward by an obstacle such as a stone, if the lower part of the rotor holder 203 is positioned on the vertical line of the side rotor 39b, the rotor 39 rises directly above and the vertical movement becomes intense, and the rotor 39, the rotor holder 203, etc. Is loaded.

  On the other hand, if the lower portion of the rotor holder 203 is tilted forward with respect to the vertical line of the side rotor 39b, the rotor 39 gently moves up and down following the obstacle when it hits the obstacle, and moves upward toward the front side of the aircraft. Makes it easier to move. Therefore, the rotor 39 and the rotor holder 203 are prevented from being damaged due to a load.

  Also, as shown in FIGS. 22 and 23, the rotor holder 203 is tilted forward, and the rotor holder 203 is disposed in front of the fuselage with respect to the rotor support frame 205, so that the distance between the rotor holder 203 and the rotor support frame 205 on it is increased. (Spacing) becomes wider. Therefore, since the upward movement range of the rotor holder 203 is widened when the rotor 39 is raised, the rotor holder 203 does not easily interfere with the rotor support frame 205 and does not hinder the upward movement of the rotor holder 203. And the rotor 39 is prevented from coming into contact with the farm scene and ruining the farm field.

  Moreover, since the leveling work position of the rotor 39 can be set upward by widening the range in which the rotor 39 can be raised, leveling suitable for the soil quality can be performed, and leveling and seedling planting accuracy are improved. For example, when the soil is soft, if the working height of the rotor 39 is set high, it is possible to prevent the rotor 39 from mixing the soil and roughening the field.

  24 and 25 show views when the shape of the connection support frame is changed. FIG. 24 is another example (side view) of the rotor support structure of the seedling transplanter, FIG. 25 (A) is a plan view of the connection support frame 215 portion shown in FIG. 17, and FIG. The top view of the connection support frame 216 part shown in FIG. 24 is shown.

  The seedling transplanting machine of this example is the same as the seedling transplanting machine shown in FIG. 17 except that the connection support frame 216 is disposed behind the rotor holder 203. The connection support frame 215 shown in FIG. 17 is a frame extending in a straight line from the rolling frame 160 located at the left and right center portion of the aircraft, but the connection support frame 216 protrudes from the left and right sides of the rolling frame 160 to the rear end portion. It is L-shaped in a plan view extending in the left-right direction from the protrusion.

  As shown in FIG. 17, if the connection support frame 215 is present in front of the rotor holder 203, when the rotor 39 at the lower part of the rotor holder 203 is lifted, interference with the connection support frame 215 is possible if the highest position is high. However, by arranging the connection support frame 216 behind the rotor holder 203, the highest position of the rotor 39 can be made higher without interfering with the connection support frame 216 even when the rotor 39 is raised. Therefore, it is possible to level the ground in a work mode according to the operator's request and field conditions, and the application range is expanded.

  Further, in the seedling transplanter 1 of the present embodiment, when the fuel in the fuel tank decreases, the fuel sensor 56 (float sensor or the like) in the tank detects that the fuel is less than a predetermined position, and the fuel lamp is turned on. However, even if the accelerator operation dial 301 is operated to a higher side (when the center position of the accelerator operation dial 301 is set to 2500 rpm) when the fuel in the tank is reduced, an increase in the engine speed is suppressed. A notification device 50 (FIG. 13) is provided that lights a lamp in the eco mode or the like and notifies a worker with a motor panel or the like. In addition, you may notify by audio | voices, such as a buzzer, instead of lighting of a lamp | ramp, or the structure which uses these together.

  That is, engine control is performed in which the engine speed is unlikely to increase when the amount of fuel is small. For example, when the accelerator operation dial 301 is set to the highest position, the engine speed increases up to 2800 to 3000 rpm, but it may be suppressed to about 2500 rpm. 2500 rpm is a standard rotation speed at the time of seedling planting work, and is often used as a reference.

With this configuration, fuel consumption can be improved, and the notification device 50 also recognizes the operator, so that confirmation of the fuel gauge is promoted and appropriate drive control is possible.
Alternatively, the accelerator operation dial 301 and the sensitivity adjustment dial 300 may be linked so that the sensitivity adjustment dial 300 is set to the “hard” side when the accelerator operation dial 301 is set to the higher side. When one of the operations is performed by the control device 5, the other corresponding control is changed. Since these dials do not move automatically, they are not apparent. For example, when the operation of the accelerator operation dial 301 is operated to a central position (2500 rpm) or more, the sensitivity adjustment dial 300 is operated to the “hard” side. Similarly, the angle of the elevation sensor 43 that automatically raises the planting unit 3 is largely corrected (about 0.5 degrees every 100 rpm). In the opposite case, the angle is lowered.

That is, when the accelerator operation dial 301 is set to the high side, the unevenness of the field is intense, and the seedling planting unit 3 is raised and lowered only when the elevation sensor 43 detects a large angle.
With this configuration, when planting seedlings, the sensitivity of hydraulic control when the vehicle speed is increased is insensitive, and the seedling planting unit 3 is prevented from moving up and down frequently, and the planting posture is stabilized.

FIG. 26 is a plan view of the main transmission lever 303 and the lever guide 305. FIG.
The main transmission lever 303 is configured to be manually switched between forward / reverse, stop, and moving speeds by rotating along the lever guide 305. That is, the higher the operation is from the neutral position 305a to the forward side (tilt forward) or the reverse side (tilt backward).

  As shown in FIG. 26, when the main transmission lever 303 is operated to the forward side or the reverse side in the lever guide 305, a main transmission sensor (potentiometer or the like) 303a ( 13), the operation position of the main transmission lever 303 is detected, and the movement of the main transmission lever 303 is detected by limit switches (sensors) 307a and 307b provided on the forward side and the reverse side of the neutral position 305a.

  In accordance with the operation amount and the operation direction from the neutral position 305a detected by the main transmission sensor 303a, the control device 5 causes the trunnion shaft (Fig. 13) 302a (forward rotation in forward rotation, reverse rotation in reverse) and trunnion shaft (Fig. A trunnion arm (not shown, directly connected to the trunnion shaft) for rotating the trunnion shaft is operated to rotate the trunnion shaft until the rotation angle of the trunnion shaft reaches a predetermined angle. The turning direction and turning angle of the trunnion shaft are detected by a trunnion shaft sensor (potentiometer or the like) 297 provided on the trunnion arm. The output of the HST 302 can be changed steplessly by changing the inclination angle of a swash plate (not shown) according to the rotation angle of the trunnion shaft.

  When the main shift lever 303 is operated forward from the neutral position 305a, the forward limit switch 307a is contacted to detect forward operation, and when operated backward, the reverse limit switch 307b is contacted to reverse. The aircraft moves forward or backward, but in the case of an operator who is not familiar with the operation of a beginner or the like in one lever operation, the intention of entering the forward due to an operation error etc. enters the reverse It can happen.

  Therefore, if the configuration is such that only when there is a plurality of lever operations from the neutral position 305a to the forward side or the reverse side, output to the HST control motor 302a and forward or backward travel is possible, the original intention of the operator This makes it possible to travel according to the conditions and improve safety.

  For example, when the main transmission lever 303 is operated twice from the neutral position 305a to the forward side, the forward travel is possible, and when the main transmission lever 303 is operated twice from the neutral position 305a to the reverse side, the reverse travel is possible. The configuration. In this case, the forward limit switch 307a detects three times on the forward side, and the reverse limit switch 307b detects three times on the reverse side. That is, as an operation procedure, the forward limit switch 307a is first detected from neutral to forward, then the forward limit switch 307a is detected for the second time by returning from forward to neutral, and the third detection is again performed from neutral to forward. It becomes.

  In addition, if the intention to move forward is reversed (here, the reverse limit switch 307b is detected once) and is returned to neutral (here, the reverse limit switch 307b is detected for the second time) and is moved forward (here The forward limit switch 307a is detected for the first time in total, the third detection in total), and is returned to neutral (where the forward limit switch 307a is detected for the second time in total, detection for the fourth time in total) and re-entered. Otherwise (here, the forward limit switch 307a is detected for the third time, the fifth detection in total), it does not move forward. That is, the condition is that the limit switch on the same side is detected three times.

  There is a possibility that the operator may make a mistake in operation with a single lever operation. However, by making the operation of the main shift lever 303 a plurality of times as a traveling condition, there is enough time for reconfirming the lever operation. It is possible to travel according to the person's original intention, and safety and workability are improved.

  Further, in the seedling transplanting machine of the present embodiment, the accelerator operation dial 301 for increasing or decreasing the engine speed is provided on the front cover 16. On the other hand, the accelerator pedal 310 that can increase or decrease the engine speed by depressing operation is provided on the floor step 13a. Provided. The accelerator operation dial 301 is operated before or during the work to set a reference value for the engine speed, and the accelerator pedal 310 forcibly increases the engine speed while the operator is stepping on. It is something to be made.

  FIGS. 27A and 28A are side views (schematic diagrams) of the accelerator pedal 310 portion, and FIGS. 27B and 28B are plan views (schematic diagrams) of the accelerator pedal 310 portion. ). FIG. 27 shows a state before the accelerator pedal 310 is depressed, and FIG. 28 shows a state when the accelerator pedal 310 is depressed.

  In seedling planting work, the accelerator operation dial 301 is controlled to a relatively low rotational speed suitable for the work, but in the case of traveling on the road, it travels at a speed higher than the work speed. The rotational speed is also controlled to a relatively high rotational speed.

  The accelerator pedal 310 is located at a position lower than the floor step 13a, and is operated by removing a lid (not shown) and putting a foot into the hole 13ab when in use. A body portion 310ba of a T-shaped lower plate 310b in a side view is fixed to the lower surface of the upper plate 310a serving as a stepping surface of the accelerator pedal 310, and the treading surface is horizontal by a torque spring 311 provided at the front end base portion of the lower plate 310b. It is urged upward to become. FIG. 27C shows a rear view of the upper plate 310a and lower plate 310b portions of the accelerator pedal 310. FIG. As shown in FIG. 27C, the upper plate 310a is a rectangular flat plate, the main body portion 310ba of the lower plate 310b is a thin rod-like (or plate-like) member in the front-rear direction, and the foot portion 310bb is in the vertical direction. It is a thin rod (or plate) member.

  A throttle wire 314 is connected to the foot portion 310bb of the lower plate 310b. When an operator puts the foot 312 and steps on the accelerator pedal 310 with a heel, the throttle wire 314 rotates in the direction of the arrow J to cause the engine rotation. It is drawn in the direction to increase the number (arrow F direction). The rotation of the foot portion 310bb is restricted by the stopper 316.

  A typical accelerator pedal protrudes above the floor step 13a and is mainly used to step forward with your toes and soles. However, if you step on the pedal, your feet will come out step by step. My feet are separated. Moreover, since it protrudes from the upper surface of the floor step 13a, it disturbs the worker's walking. The case of walking on the floor step 13a refers to all the actions accompanied by walking that are generally performed by an operator at the time of planting work, such as replenishment of seedlings and fertilizers, getting on and off the traveling vehicle body 2, and the like.

  However, with this configuration, the accelerator pedal 310 is below the floor step 13a, so that it does not become an obstacle during walking if the lid 13 is closed and the hole 13ab is closed. Further, when the floor step 13a is removed, the accelerator pedal 310 does not get in the way and can be easily detached. When carrying out maintenance carefully or performing larger-scale repairs or the like, it is necessary to remove the floor step 13a and remove mud adhered to the frame or the like. In addition, it is easy to use without slipping forward because it is not a structure that steps forward but a structure that steps backward with a heel. Therefore, even an operator who is not accustomed to traveling operation is excellent in operability.

  Further, a sub-transmission device 315 is disposed in an interlocking mechanism in the mission case 21 driven through the HST 302 as the main transmission device, and a sub-transmission lever 313 provided on the side of the handle 17 (see FIGS. 1 and 29). Thus, the gear mechanism of the auxiliary transmission 315 is switched, and the traveling speed is changed depending on the combination of the gear mechanisms. By operating the auxiliary transmission lever 313 along the lever guide 313b, it is configured to switch between a high-speed “road running mode”, a low-speed “working running mode”, and a neutral that does not transmit to the running system.

FIG. 30 shows a transmission mechanism diagram (plan view) of the HST 302 and the auxiliary transmission 315 in the mission case 21.
The rotational speed of the driving force of each part transmission shaft of the auxiliary transmission 315 varies depending on the output of the HST 302, but the upper limit is changed depending on the combination of gear mechanisms. In the “road traveling mode” (movement), the traveling speed is increased even if the output of the HST 302 is low because the structure rotates at a high speed according to the gear ratio of the traveling speed gear 315a. In the “working traveling mode” (planting speed), since the structure rotates at a low speed depending on the gear ratio of the planting speed gear 315b, the traveling speed hardly increases even if the output of the HST 302 is increased, and the traveling is performed at a relatively low speed.

  In this “work travel mode”, although the speed is relatively low, subtle speed control cannot be performed, and when the seedling transplanter 1 is loaded on the truck, it is preferable to set the speed lower for safety. Therefore, it is preferable to provide an “unloading mode” (unloading speed) at an extremely low speed at the operation position of the auxiliary transmission lever 313.

  In the “unloading mode”, the traveling speed is hardly increased even when the output of the HST 302 is increased by the unloading speed gear 315c assembled at a gear ratio that rotates at a lower speed than the gear ratio of the planting speed gear 315b. Become. With this configuration, when the seedling transplanter 1 is loaded on the truck, the safety can be improved by operating the auxiliary transmission lever 313 in the “unloading mode” to make the speed lower than the work travel mode.

In addition, since the traveling mode can be changed by operating the auxiliary transmission lever 313, the operator can operate while sitting on the cockpit 14, and the operability is excellent.
In addition, the “unloading mode” may be automatically set regardless of the operation of the auxiliary transmission lever 313.

  Electrode plates 320 are provided on the sides of the left and right front wheels 12a and the rear wheels 12b. If there is no energization, the controller 5 determines that the field is out of the field, and if the elevation angle sensor 43 detects a large angle of a predetermined angle or more, the loading operation is performed. This is a configuration in which it is determined that there is a switch to “unloading mode”. Since the field is filled with water and the resistance value of the electrode plate 320 is different from that of a relatively dry road when traveling on the road, the energized state can be determined.

  The operation position of the sub transmission lever 313 is detected by a sub transmission sensor (sub transmission operation position detecting member) 313a (FIG. 13) at the base of the sub transmission lever 313. Then, by providing the sub-transmission switching motor 330 (FIG. 13) for switching the sub-transmission mechanism, the operation position of the sub-transmission lever 313 is automatically switched to the “unloading mode” without operating the sub-transmission lever 313. Therefore, even if the operator forgets to operate the lever, it is safe because the speed is extremely low. In other words, the auxiliary transmission switching motor 330 rotates the auxiliary transmission lever 313 to switch the gear in the same manner as in manual operation.

  Further, when the “loading and unloading mode” is automatically set, the control device 5 operates the lifting cylinder 22b so that the seedling planting unit 3 is also automatically lifted. When the seedling transplanter 1 is loaded on the truck, the seedling transplanter 3 is also lifted, so that the seedling transplanter 3 hits the step board (a ladder used to put the seedling transplanter on the truck) and breaks. Can be prevented.

In FIG. 31, the principal part top view of the seedling transplanting machine at the time of using the winch 400 is shown.
Further, a “winch mode” when using the winch 400 may be provided at the operation position of the auxiliary transmission lever 313. Normally, when the winch 400 is used, it is performed in the “working running mode”. However, the wheels 12a and 12b are rotated while the power of the winch 400 is secured. The traveling speed of the vehicle body 2 is increased, and the wheels 12a and 12b are idled, resulting in the resistance of the winch 400. It is desirable that the traveling speed is low and the output of the HST 302 and the engine 11 is high during escape movement. However, if the auxiliary transmission 315 is set to “planting speed” and the output of the HST 302 and the engine 11 is increased in this state, the escape is performed. The movement becomes too fast, and the wheels 12a and 12b may slip and the movement by the winch 400 may not be performed smoothly.

  In the “winch mode”, the output of the HST 302 and the engine 11 is increased by switching the gear of the sub-transmission device 315 to a combination (winch speed gear 315d in FIG. 34) that only produces a speed slower than the planting travel speed. However, the speed at which the wheels 12a and 12b slide can be prevented, and the winch 400 is prevented from becoming a resistance. Instead of the above-described “unloading mode” (unloading speed gear 315c), a “winch mode” (winch speed gear 315d) may be provided, or both modes may be used in combination as shown in FIG. The “winch” involves moving out of the field and requires a speed that is not as high as planting. On the other hand, it is necessary to improve safety by using a very low speed at the “unloading speed”. Therefore, when both modes are provided, the “winch” is closer to the “planting speed” than the “unloading speed”.

  The power source of the winch 400 is a dedicated winch motor M (independent of the transmission system of the traveling vehicle body), and rotates the reel shaft 411 of the reel 412. The winch 400 is connected to the traveling vehicle body 2 via a winch frame 414 attached to the body frame and a reel bracket 442 that receives the reel 412 on the winch frame 414. The winch frame 414 has a long hole 441 for adjusting the left and right positions, and the mounting position of the reel bracket 442 can be adjusted.

  In the “winch mode”, as shown in FIGS. 32 and 34, the traveling speed of the traveling vehicle body 2 is reduced by switching the gear transmission of the auxiliary transmission 315 to “winch”, so that the wheels 12a and 12b do not idle. Does not become the resistance of winch 400. Therefore, escape from the wetland becomes easy and workability is improved.

  Further, when the wire 408 of the winch 400 is pulled out, it is possible to improve the workability by automatically setting the “winch mode”. When the wire 408 of the winch 400 is pulled out, the rotation of the reel 412 (rotation of the reel shaft 411) of the winch 400 is detected by a reel shaft rotation sensor (potentiometer or the like) 340, so that the control device 5 controls the auxiliary transmission switching motor 330. Operate to switch to “winch mode”.

  At this time, if the winding speed of the winch 400 and the vehicle speed are set to the same speed, the output from the wet field is improved. The winding speed of the winch 400 is detected by a reel shaft rotation sensor 340, and the vehicle speed is detected by a vehicle speed sensor 342 (FIG. 13). The winding speed of the winch 400 is controlled by the control device 5 of the winch motor M.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 2 Traveling vehicle body 3 Seedling planting part 5 Control device 6 Leveling device 9 Extension frame 10 Main frame 11 Engine 12a Front wheel 12b Rear wheel 12c First auxiliary wheel 12d Second auxiliary wheel 12g Rear wheel gear case 13a Floor step 13b Rear Step 14 Engine cover 15 Pilot seat 16 Front cover 17 Handle 18 Spare seedling frame 19 Drawing marker 20 Fertilizer 21 Mission case 22 Lifting mechanism 23 Link base frame 24 Pot seedling placement section 25 Planting transmission mechanism section 27 Empty box housing section
DESCRIPTION OF SYMBOLS 29 Seedling box supply apparatus 30 Pot seedling box introduction part 31 Seedling box main conveyance path 32 Seedling box conveyance apparatus 33 Seedling extraction apparatus 34 Seedling conveyance apparatus 35 Seedling removal apparatus 36 Seedling lateral feed apparatus 37 Seedling planting apparatus 38 Float 39 Rotor 40 Rotor Transmission shaft 41 Drive case 43 Elevation angle sensor 45 Planting transmission frame 46 Seedling stage support frame 50 Notification device 56 Fuel sensor 60 Rotating member 61 Locking claw 63 Shut-off claw 64 First transmission shaft 65 Seedling box feed cam 66 Seedling box operation Arm 67 Roller 68 Spring 69 Seedling box feed drive shaft 70 Seedling box feed drive arm 72 Seedling push-out pin 73 Slide shaft 74 First fan gear 75 Gear shaft 76 Second fan gear 78 Support shaft 79 Seed takeout operation arm 80 Roller 81 Seed takeout Cam 83 Seedling holder 84, 85 Swing link 86 Support member 88, 90 Arm 89 Telescopic rod 91 Seedling transfer transmission case 92 Input shafts 93, 94 Transmission gear 95 Seedling transfer drive shaft 100 Seedling hitting 101 Seedling hitting mounting shaft 102 Seedling hitting arm 103 Rotating arm 104 Roller 105 Cam shaft 106 Seedling hitting cam 107 Spring 110 Seedling lateral feed drive shaft 111 Drive roller 112 Follower roller 113 Seedling feed belt 114 Deflection prevention plate 115 Planting guide 120 Planting drive shaft 121 Rotating case 122 Seedling implanter 130 Input shaft 131, 132 Bevel gear 133 Second transmission shaft 135, 136 Bevel gear 137 Transmission chain 137a, 137b Sprockets 140, 141, 143, 144, 147, 148 Bevel gear 142 Vertical transmission shaft 150 Rotor transmission case 160 Rolling frame 161 Link receiving frame 162 Rolling spring 164 Rolling mode 166 Rolling potentiometer 201 Suspension spring 203 Rotor holder 205 Rotor support frame 207 Rotating connection arm 209 Rotor arm 211 Adjustment lever 213 Beam frame 214 Planting frames 215, 216 Connection support frame 217 Connection pipe 218 Installation stay 219 Installation line 221 Rotor support member 225 Mounting tool 227 Mounting hole 230 Bolt 231 Nut 297 Trunnion shaft sensor 300 Sensitivity adjustment dial 301 Accelerator operation dial 302 HST 303 Main transmission lever 305 Lever guide 307 Limit switch 310 Accelerator pedal 311 Torque spring 312 Foot 313 Sub transmission operation lever
314 Throttle wire 315 Subtransmission 316 Stopper 320 Electrode plate 330 Subtransmission switching motor 340 Reel shaft rotation sensor 400 Winch 408 Wire 411 Reel shaft 412 Reel 414 Winch frame 441 Long hole 442 Reel bracket

Claims (5)

A traveling vehicle body (2) having a pair of left and right traveling wheels (12b), auxiliary wheels (12c, 12d) mounted on each traveling wheel (12b), and seedlings loaded on the rear part of the traveling vehicle body (2) are planted. A seedling planting part (3), a leveling device (39) for leveling a field scene where seedlings are planted, and a plurality of leveling support members (39) provided in the seedling planting unit (3) and supporting the leveling device (39) 205) and a plurality of leveling suspension members (203) for suspending the leveling device (39) to be movable up and down on the side of each leveling support member (205), a lower portion of each leveling support member (205), and each leveling suspension In the seedling transplanting machine provided with the lower connecting member (209) for connecting the lower part of the lowering member (203),
The leveling suspension member (203) is provided between the traveling wheel (12b) and the auxiliary wheel (12c, 12d),
A seedling transplanter characterized in that a connecting pipe (217) for connecting the lower connecting members (209) to each other is provided at the lower part of the lower connecting member (209).   The lower connection member (209) includes a first leveling connection arm (209a) extending downward from the leveling support member (205) to the rear side of the machine body and a first leveling connection from the leveling suspension member (203) toward the rear side of the machine. It is composed of a second leveling connection arm (209b) connected to the lower end of the arm (209a), and the first leveling connection arm (209a) has an L shape having a bent portion at the rear upper end in a side view. The seedling transplanter according to claim 1.   The leveling suspension member (203) is disposed on the front side of the machine body relative to the leveling support member (205), and the leveling suspension member (203) is disposed in a forward inclined posture with respect to the vertical line of the leveling device (39). The seedling transplanter according to claim 1 or 2, characterized in that. An upper connection member (207) for connecting the upper part of each leveling support member (205) and the upper part of each leveling suspension member (203);
The upper connecting member (207) has a connecting mechanism in which the angle of the crossing line between the upper connecting member (207) and the leveling suspension member (203) is always an acute angle. The seedling transplanter according to any one of the above. The leveling device (39) includes a central leveling body (39a) provided at the left and right center of the seedling planting part (3), and side leveling bodies (39b, 39) provided at the left and right of the central leveling body (39a), respectively. 39b),
The side leveling bodies (39b, 39b) are configured by mounting a plurality of leveling bodies (39ba, 39ba) on a rotating shaft (39bb, 39bb),
The upper parts of the plurality of leveling support members (205) are attached to the beam frame (213) having a longitudinal direction in the left-right direction provided above the side leveling bodies (39b, 39b) and at the rear part of the traveling vehicle body (2). A connection support frame (215) for connecting the lower part of the leveling support member (205) of
The lower end of each leveling suspension member (203) is mounted between the plurality of leveling bodies (39ba, 39ba) of the side leveling bodies (39b, 39b),
The traveling wheels (12b) and the auxiliary wheels (12c, 12d) are arranged on the front side of the leveling bodies (39ba, 39ba), respectively.
The auxiliary wheels (12c, 12d) are provided on the left and right outer sides of the traveling wheel (12b) and have an outer auxiliary wheel (12c) having a smaller diameter than the traveling wheel (12b) and on the left and right inner sides of the traveling wheel (12b). It is composed of an inner auxiliary wheel (12d) having a smaller diameter than the auxiliary wheel (12c),
The leveling suspension member (203) is formed with a bent portion (203a) from the upper and lower sides of the leveling suspension member (203) from the upper side to the lower side from the left and right inner sides to the outer side, and the upper portion is the leveling body (39ba). The seedling transplanter according to claim 1, wherein the seedling transplanter is configured to be positioned above.

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