Seedling transplanter

Abstract

To provide a seedling transplanter capable of stably transplanting seedlings in a field while reducing labor of an assistant worker.SOLUTION: In the seedling transplanter provided with a traveling wheel 7 and a traveling transmission case 10 for transmitting the driving force of an engine 8 to the traveling wheel 7 and a seedling planting machine 3 for planting seedlings in a field, an auxiliary worker boarding part 12 for allowing an auxiliary worker to board is provided in the rear part of the traveling transmission case 10, and the worker boarding part 12 is provided with an auxiliary driving wheel 15 driven by receiving the rotational driving force of the traveling wheel 7 and an auxiliary driving wheel transmission case 24 for transmitting the rotational driving force of the auxiliary driving wheel 15 to the traveling wheel 7. A vehicle height interlocking member for interlocking with the vertical movement of the vehicle height of the seedling transplanter is provided, and when the vehicle height of the seedling transplanter is increased, the assistant worker boarding part is moved upward according to the increase of the vehicle height.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a seedling transplanter for transplanting seedlings into a field. [Background technology]

[0002] Patent Document 1 discloses a seedling transplanter equipped with a work platform at the rear of the machine that allows an assistant worker to easily get on and off in a standing position to manually plant seedlings in areas where the seedlings could not be planted properly during planting work by the seedling transplanter.

[0003] This work platform is equipped with support wheels, which are driven wheels, and these support wheels roll while supporting the weight of the assistant worker, allowing the assistant worker to be towed by the seedling transplanter's body and move around. This reduces the effort required for the assistant worker to walk around the field. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-116529 [Patent Document 2] Japanese Patent Publication No. 2020-195400 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, an object of the present invention is to provide a seedling transplanter that can stably transplant seedlings into a field while reducing the labor of assistant workers. [Means for solving the problem]

[0006] In order to achieve the above object, the first invention is: A traveling vehicle body equipped with traveling wheels and configured to be able to travel in a field, a travel transmission case that transmits the driving force of the engine to the travel wheels; A seedling transplanter equipped with a seedling planter for planting seedlings in a field, a seating area for an assistant worker on which an assistant worker can ride is provided at a rear portion of the travel transmission case; The auxiliary worker riding section includes an auxiliary drive wheel that receives the rotational drive force of the running wheel to drive it, and an auxiliary drive wheel transmission case that transmits the rotational drive force of the running wheel to the auxiliary drive wheel, The vehicle is characterized in that it is provided with a vehicle height interlocking member for interlocking with the raising and lowering of the vehicle height of the traveling vehicle body, and when the vehicle height of the traveling vehicle body rises, the auxiliary worker riding section moves upward in response, and the auxiliary drive wheel moves away from the ground.

[0007] According to the first aspect of the present invention, The operator seat is equipped with an auxiliary drive wheel that receives the rotational drive force of the running wheel and drives it, and an auxiliary drive wheel transmission case that transmits the rotational drive force of the running wheel to the auxiliary drive wheel, thereby reducing the rearward pulling load on the seedling transplanter, preventing slippage of the running drive wheel, and stabilizing the machine balance. As a result, the planting spacing (plant spacing) and the spacing between seedlings (row spacing) can be stabilized while reducing the labor of the assistant operator.

[0008] Furthermore, when the machine body is turned, the turning can be performed without interfering with the ridges, thereby improving work efficiency.

[0009] The second invention is: The auxiliary worker boarding section is characterized by including a step board section for the auxiliary worker to board, and a seat section provided on the step board section for the auxiliary worker to sit on.

[0010] According to the second aspect of the present invention, stable seating is possible, improving safety and work efficiency. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a seedling transplanter that can stably transplant seedlings into a field while reducing the labor of assistant workers. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic left side view of a seedling transplanter according to a preferred embodiment of the present invention. [Figure 2] 2 is a plan view of the seedling transplanter of FIG. 1. FIG. [Figure 3] 3 is a rear view of the crushing mechanism of the seedling transplanter of FIG. 1. FIG. [Figure 4] 4 is a side view of the seedling transplanter of FIG. 1 in which a seating section for an assistant operator is provided. [Figure 5] 5 is a left side view of the assistant operator seating section of FIG. 4. FIG. [Figure 6] FIG. 6 is a perspective view of the same. [Figure 7] FIG. 7 is a perspective view of the same. [Figure 8] FIG. 8 is a plan view of the same. [Figure 9] FIG. 9 is a right side view of the same. [Figure 10] FIG. 10 is a perspective view of the vicinity of the assistant operator's seating section of the seedling transplanter 1 according to another embodiment. [Figure 11] FIG. 11(a) is a schematic rear view of the connecting pipe when the left-right width is expanded, and FIG. 11(b) is a schematic rear view of the connecting pipe when the left-right width is expanded. DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment specifically constructed based on the above technical concept will be described below with reference to the drawings. In the description, "front, back, left, right" refers to the forward direction F of the seedling transplanter 1. First, the basic configuration of the seedling transplanter 1 will be described below. Description of the commonly known configuration of the seedling transplanter 1 will be omitted where appropriate.

[0014] <Basic configuration> As shown in Figures 1 and 2, the left side view and top view of the seedling transplanter 1 according to the present invention are shown. The seedling transplanter 1 is equipped with a seedling planter 3 and a crushing mechanism 4 mounted on a traveling vehicle body 2 configured to travel in a field. The planting depth of the seedling planter 3 is adjusted to the furrow surface height using a furrow surface sensor S, and the crushing mechanism 4 crushes both sides of the planting position as the machine travels. In the illustrated example, a two-row planting configuration is used, with each type of seedling planter 3 and crushing mechanism 4 mounted side by side on both sides of the machine main frame 5. For ease of explanation, the auxiliary operator riding section 12, described below, is not shown in Figures 1 and 2.

[0015] The running body 2 is a body for running, and is provided with a main frame 5 which forms the skeleton of the body, on which are arranged front wheels 6, rear wheels 7, 7, an engine 8 which serves as the driving source, a front step 9 which is used when getting on from the front, and a running transmission case 10 which transmits the driving force output from the engine 8 to the rear wheels 7, 7 which are the running wheels, and is capable of running in a field by the rotational drive of the rear wheels 7, 7 which are the running wheels.

[0016] The seedling planting machine 3 is equipped with an openable, beak-shaped seedling planting body 3a that can be raised and lowered, and receives seedlings delivered and transported by the seedling transport device D (5) and plants them at a predetermined depth on the furrow surface.The suppression mechanism 4 is composed of left and right suppression members 4a, 4a (11, 11) that press the furrow surface on both the left and right sides of the seedlings to be planted, and is arranged at the rear of the seedling planting machine 3.

[0017] More specifically, as shown in the rear view of Figure 3, each suppression mechanism 4 is configured such that a suppression rod 4b (14) is supported on the main frame 5 and can be biased downward by a spring 4c (14a), and a roughly inverted triangular connecting plate 4g (13) is supported at the lower end of this suppression rod 4b (14) so ​​that it can rotate left and right, and suppression wheels 4a (11, 11) are supported at equidistant positions on the left and right of this supporting portion 4d (13a) via left and right support arms 4f, 4f (12, 12) so that they can roll, and the biasing force of the suppression rod 4b (14) can be distributed in balance to the left and right suppression wheels 4a, 4a (11, 11) by the connecting plate 4g (13).

[0018] The seedling transplanter 1 also includes a vehicle height adjustment mechanism that adjusts the vehicle height by rotating the travel transmission case 10 through the extension and contraction of the lifting cylinder 11. For the general known configuration of this vehicle height adjustment mechanism, please refer to Patent Document 2 (JP 2020-195400 A) as needed.

[0019] An assistant operator riding section 12 on which an assistant operator can ride is provided at the rear of the traveling transmission case 10. The assistant operator riding section 12 will be described in detail below.

[0020] <Assistant worker boarding section> FIG. 4 is a side view of the seedling transplanter 1 on which the assistant operator riding section 12 is provided.

[0021] As shown in Figure 4, the auxiliary worker boarding section 12 includes a step board section 13 for the auxiliary worker to board, side body sections 14 attached to the left and right sides of the step board section 13, auxiliary drive wheels 15 attached to the rear of the side body sections 14, an auxiliary drive wheel transmission mechanism 16 that transmits the driving force of the rear wheels 7, 7 to the auxiliary drive wheels 15, and a seat section 17 provided on the step board section 13 for the auxiliary worker to sit on.

[0022] Fig. 5 is a left side view of the assistant worker riding section of Fig. 4, Figs. 6 and 7 are perspective views of the same, and Fig. 8 is a plan view of the same. As shown in Figs. 5 to 8, step plate section 13 is a member that forms the upper surface portion of assistant worker riding section 16 and is a generally rectangular plate with its longitudinal direction. The front end of step plate section 13 is provided with recessed cutout section 18 to prevent interference with rear wheel 7, and a rear wheel fender 19 (running wheel fender 19) is provided in a wall-like shape that rises along cutout section 18 to prevent mud from splashing up from rear wheel 7. This rear wheel fender 19 prevents mud splashing up from rear wheel 7 from adhering to floor surface 13a of step plate section 13, thereby improving convenience in terms of safety and hygiene for the assistant worker.

[0023] A plurality of burred holes 13b are formed on the floor surface 13a of the step board portion 13 by burring the edges of the upper holes to widen them and make them stand upright. These burred holes 13b function to prevent slipping on the floor surface 13a and to remove mud from the shoes of assistant workers. An anti-slip sheet may be placed on the floor surface 13a.

[0024] The rear end of the step board portion 13 is provided with an inclined portion 13c that slopes downward toward the rear, and is configured so that an assistant worker can easily get on by placing their feet on the inclined portion 13c.

[0025] The underside of the step plate 13 is provided with a rear wheel scraper 13d for scraping mud off the rear wheels 7 and an auxiliary drive wheel scraper 13e for scraping mud off the auxiliary drive wheels 15. The rear wheel scraper 13d and the auxiliary drive wheel scraper 13e can be made of various materials, such as steel plates, wire rods, spatulas, or brushes. These mud-scraping members are attached to the underside of the step plate 13, with their tips extending and abutting the rear wheels 7 and the auxiliary drive wheels 15, respectively, to achieve the mud-scraping effect. The rear wheel scraper 13d and the auxiliary drive wheel scraper 13e scrape mud off the rear wheels 7 and the auxiliary drive wheels 13e, preventing slippage and stabilizing planting by the seedling transplanter 1. This is particularly effective for the auxiliary drive wheels 15, which are smaller in diameter than the rear wheels 7, preventing the wheel diameter from changing due to mud buildup, resulting in unstable running.

[0026] The rear wheel scraper 13d is provided behind the rear wheel and below the rear wheel fender 13d. The auxiliary drive wheel scraper 13e is provided on the underside of the step plate portion 13 and obliquely above and behind the auxiliary drive wheel 15.

[0027] Next, the side body portion 14 will be described.

[0028] The side body sections 14 are members that form the left and right side portions of the assistant worker riding section 12, and are connected to the traveling transmission case 10 so as to sandwich the traveling transmission case 10 from the left and right, with the upper end fixed by bolts to the underside of the step plate section 13. The front end of the side body sections 14 extends forward from the step plate section 13, and is bolted to the traveling transmission case 10 via bearings on the left and right sides, so that the side body sections 14 are attached to the traveling transmission case 6 so as to be rotatable about bolt fastening sections 20 that are arranged coaxially with the axles of the rear wheels 7 without interfering with the rotation of the rear wheels 7.

[0029] This allows the auxiliary worker riding section 12 to be rotated upward (in the direction of arrow F2) and folded, and by folding it when the machine body is turning, it can be turned without any hindrance. Also, when not in use, the machine body can be made compact by folding it. The travel transmission case 10 is provided with a stopper 21 that locks the auxiliary worker riding section 12 and restricts the rotation when the auxiliary worker riding section 12 rotates more than a predetermined rotation angle (for example, 160 degrees upward from the horizontal position).

[0030] An auxiliary drive wheel 15 is provided on the rear end side of the side body section 14, and is driven by the rotational drive force transmitted from the rear wheel 7. This auxiliary drive wheel 15 functions to assist the seedling transplanter 1 in traveling by being driven, and is formed with a smaller diameter than the rear wheel 7 and is disposed slightly forward of the rear end of the step plate section 13. In this way, this auxiliary drive wheel 15 is formed with a smaller diameter than the rear wheel 7 and is configured to rotate faster (more) than the rear wheel 7, thereby enabling the auxiliary operator riding section 12 to travel stably when an assistant operator is riding on it.

[0031] The side body portion 14 includes an inner side body portion 22 disposed inside the vehicle body relative to the connected travel transmission case 10, and an outer side body portion 23 disposed outside the vehicle body.

[0032] The inner side body portion 22 is a rigid plate-like member that forms the left side surface of the auxiliary worker riding portion 12, and the outer side body portion 23 is a rigid plate-like member that forms the right side surface of the auxiliary worker riding portion 12. The outer side body portion 23 is formed by fitting an inner case 23a having a generally U-shaped cross section with an outer case 23b having a generally U-shaped cross section that is formed so as to cover the open surface of the inner case 23a, and fastening them together with bolts to form a housing for the auxiliary drive wheel transmission mechanism 16 (described later). In the illustrated example, the open surface of the inner case 23a faces the inside (right side) of the vehicle body, and the open surface of the outer case 23b faces the outside (left side) of the vehicle body. The outer case 23b is formed to be slightly larger than the inner case 23a to match the shape of the inner case 23a and cover the open surface of the inner case 23a like a lid.

[0033] The outer side body portion 23 forming the housing and the auxiliary drive wheel transmission mechanism 16 housed therein are collectively referred to as an auxiliary drive wheel transmission case 24.

[0034] The outer case 23b is fixed and fitted to the inner case 23a by fastening bolts, and can be easily attached to and detached from the inner case 23a by operating the fastening bolts. The outer side body portion 23 configured in this manner is provided on the outside of the aircraft, and the outer case 23b can be easily attached and detached, which facilitates maintenance and part replacement of the auxiliary drive wheel transmission mechanism 16, which will be described later.

[0035] Next, the auxiliary drive wheel transmission mechanism 16 will be described with reference to FIG.

[0036] FIG. 9 is a right side view of the assistant operator riding section 12 as seen from the direction Q in FIG. 8, showing a state in which the outer case 23b has been removed from the inner case 23a.

[0037] The auxiliary drive wheel transmission mechanism 16 is a mechanism that transmits power to the auxiliary drive wheel 15, and includes a traveling output sprocket 16a that is provided on the axle of the rear wheel 7 and rotates together with the rear wheel 7, and a traveling input sprocket 16c that receives the transmission chain 16b wound around it together with the traveling output sprocket 16a, and the traveling input sprocket 16c is provided on the axle of the auxiliary drive wheel 15 and transmits rotational driving force to the auxiliary drive wheel 15. The auxiliary drive wheel transmission mechanism 16 configured in this way transmits the rotational driving force of the rear wheel 7 to the auxiliary drive wheel 15, and functions to impart running force to the auxiliary drive wheel 15.

[0038] In this way, the auxiliary drive wheels 15 are configured to rotate by receiving the rotational drive force of the rear wheels 7 via the auxiliary drive wheel transmission mechanism 16 when the seedling transplanter 1 is traveling, thereby exerting forward propulsion force on the auxiliary operator riding section 12. This reduces the rearward pulling load on the seedling transplanter 1 and assists the traveling of the seedling transplanter 1. As a result, slippage of the rear wheels 7, which are the driving wheels for traveling, is suppressed, the machine balance during traveling is stabilized, and meandering is suppressed. As a result, even when the weight of the auxiliary operator is applied to the operator riding section 12, the planting spacing of seedlings (plant spacing) and the distance between seedlings on the left and right (row spacing) can be stabilized.

[0039] Additionally, the auxiliary drive wheel transmission mechanism 16 is configured so that the rotation speed of the travel input sprocket 16c is higher than the rotation speed of the travel output sprocket 16a. For example, the travel output sprocket 16a has 24 teeth, while the travel input sprocket 16c has 13 teeth. Accordingly, the rotation speed of the auxiliary drive wheels 15 is higher than the rotation speed of the rear wheels 7 (in other words, the rotation ratio is set so that the drive speed of the auxiliary drive wheels 15 is higher than the drive speed of the rear wheels 7). As a result, even when the weight of an auxiliary worker is applied to the auxiliary worker riding section 12, the auxiliary drive wheels 15 are less likely to slip, enabling more stable planting of seedlings.

[0040] The running output sprocket 16a and the running input sprocket 16c can be replaced with sprockets having different numbers of teeth. For example, on slopes, the number of teeth can be increased or decreased by replacing the running output sprocket 16a or the running input sprocket 16c (for example, ±4 teeth), thereby making it possible to adjust the auxiliary drive wheel 15 to be less likely to slip.

[0041] Additionally, a tensioner 25 capable of adjusting the tension (stretching) of the power transmission chain 16b is provided on the side body portion 14. This tensioner 25 is configured by fastening a shafted bolt 25b (tension adjuster) equipped with a shaft member (not shown) that abuts against the power transmission chain 16b and adjusts the tension into an adjustment hole 25a formed by cutting out a predetermined range above and below the side body portion 14 (more specifically, both the inner case 23a and the outer case 23b) in a gentle arc shape.

[0042] The tension of the power transmission chain 16b can be adjusted by the operator by appropriately changing the fastening position of the shaft bolt 25b in the adjustment hole 25a. In other words, the higher the adjustment hole 25a is positioned and fastened, the tighter the tension of the power transmission chain 16b, which makes it possible to correct slack and prevent breakdowns. Conversely, the lower the adjustment hole 25a is positioned and fastened, the looser the adjustment can be. In this way, when the number of teeth on the travel output sprocket 16a or the travel input sprocket 16c is replaced to increase or decrease, or when slack occurs in the power transmission chain 16b due to wear, etc., operating the tensioner 25 effectively prevents breakdowns.

[0043] The head (operating part) of the shaft bolt 25b (tension adjuster) is exposed to the outside of the side body part 14, which makes it possible to adjust the tension of the transmission chain 16c without removing the outer case 23b, thereby speeding up the adjustment work.

[0044] Next, the seat portion 17 on which the assistant worker sits will be described.

[0045] The seat section 17 is for the auxiliary worker who boards the auxiliary worker boarding section 12 to sit on, and reduces the burden on the auxiliary worker by sitting on it, and also stabilizes the posture of the auxiliary worker by sitting on it or holding it, preventing the auxiliary worker from unintentionally falling from the auxiliary worker boarding section 12.

[0046] The seat section 17 comprises a base pipe 17a fixed onto the step board section 13, a vertical height adjustment pipe 17b inserted into the base pipe 17a so as to be able to slide up and down, a rotating pipe 17c inserted into the vertical height adjustment pipe 17b so as to be able to rotate around a vertical axis, and a sitting saddle 17d connected to the upper end of the rotating pipe 17c.

[0047] The base pipe 17a is fixed to the front left side of the upper surface of the step plate 13, and a push bolt 17e with a handle is provided at the top of the base pipe 17a to secure the vertical height adjustment pipe 17b. This allows the height of the upper end of the vertical height adjustment pipe 17b to be continuously adjusted and then fixed at the desired height by tightening the push bolt 17e with the handle. The overall length of the base pipe 17a is set to be equal to or less than the knee height of an average adult (e.g., 60 cm or less), and the height of the saddle 17d (described later) can be set to a position slightly lower than the waist. This allows the assistant worker to sit shallowly on the assistant worker riding section 12, which is convenient for getting on and off. Furthermore, because the base pipe 17a is fixed to the front left side of the upper surface of the step plate 13, the seat section 17 can be positioned in a way that makes it easy for the assistant worker to perform planting work.

[0048] The rotating pipe 17c is provided so as to be rotatable relative to the vertical height adjustment pipe 17b by a rotation operation by an operator, and this allows the saddle 17d, which will be described later, to be rotated to a desired orientation.

[0049] The saddle 17d is connected to the upper end of the rotating pipe 17c with a ball joint, which allows the vertical angle of the tip of the saddle 17d to be changed. This allows for fine adjustments to suit the assistant worker's body type and preferences, allowing for a stable seating position. This improves safety and work efficiency.

[0050] Next, the vehicle height interlocking configuration of the assistant worker riding section 12 will be described.

[0051] Normally, when the seedling transplanter 1 turns, the operator operates the vehicle height adjustment mechanism to raise the vehicle height to a height where the seedling planting machine 3 cannot plant, and the planting machine 3 turns so as not to interfere with the ridges. At this time, it is desirable to also rotate the assistant operator's riding part 12 upward to avoid interference with the ridges.

[0052] Therefore, one end of a vehicle height interlocking wire 13f is connected near the rotation center (bolt fastening portion 12) of the auxiliary operator riding part 12 (in the illustrated example, rear wheel fender 19) as a vehicle height interlocking member for interlocking the vehicle height with the raising and lowering of the vehicle, and the other end of the vehicle height interlocking wire 13f is connected to an appropriate location (for example, the left or right end of the front step 9) that moves up and down in conjunction with the vehicle height of the traveling vehicle body 2. The vehicle height interlocking wire 13f is set to a length such that when the vehicle height is raised to a height at which the seedling planting machine 3 cannot plant, the auxiliary operator riding part 12 is pulled upward and rotates upward by approximately 45 to 60 degrees from the horizontal position. Note that when the vehicle height of the seedling planting machine 3 is adjusted to a height at which planting is possible, the vehicle height interlocking wire 13f bends and the auxiliary operator riding part 12 touches the ground. By providing such a vehicle height interlocking configuration, the worker does not need to rotate the auxiliary worker riding section 12 when turning the machine body, thereby improving work efficiency.

[0053] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these modifications are also included within the scope of the present invention.

[0054] <Two units arranged on the left and right of the assistant worker seating area> FIG. 10 is a perspective view of the vicinity of the assistant operator's seating section of the seedling transplanter 1 according to another embodiment.

[0055] Next, a configuration in which the assistant operator riding sections 12 are provided on both the left and right sides of the seedling transplanter 1 (two-unit arrangement on the left and right) will be described.

[0056] In the above, the configuration in which the operator's seat 12 is provided on the left side of the seedling transplanter 1 has been described, but as shown in Figure 10, the operator's seat 12 can also be provided on both the left and right sides of the seedling transplanter 1 so as to be symmetrical (in other words, connected to the left and right travel transmission cases 10, respectively). This can further improve the balance of the machine body.

[0057] Furthermore, a connecting pipe 26 may be provided to connect the left and right auxiliary worker boarding sections 12, and a rectangular, flat worker step 27 on which a worker can temporarily stand may be provided approximately in the center of the connecting pipe 26. This improves the strength of the left and right auxiliary worker boarding sections 12, and the worker step reduces the worker's effort, improving convenience. In the illustrated example, both left and right ends of the connecting pipe 26 are fixed to the inclined portions 13c of the left and right step plate sections 13. However, this is not limited to this, and the connecting pipe 26 may be fixed to the front-rear intermediate portions 14a of the left and right side body sections 14. In this case, the connecting pipe 26 is configured to be positioned further below the position of the main frame 5 when the vehicle height adjustment mechanism is at its maximum lowering position. This prevents interference between the traveling vehicle body 2 and the connecting pipe 26 during vehicle height adjustment.

[0058] Furthermore, it is desirable that the connecting pipe 26 be configured so that its left and right width can be adjusted in accordance with the left and right spacing (row spacing) adjustment of the seedling planting body 3a in the seedling planting machine 3. Figure 11(a) is a schematic rear view of the connecting pipe 26 when the left and right width is extended, and Figure 11(b) is a schematic rear view of the connecting pipe 26 when the left and right width is expanded or contracted.

[0059] 11(a) and 11(b), the connecting pipe 26 has a double-pipe configuration in which an inner cylindrical pipe 26b (left side) is inserted through an outer cylindrical pipe 26a (right side), and the width of the connecting pipe 26 can be adjusted freely in left and right in accordance with the width of the left and right auxiliary worker riding sections 12, 12. At this time, the worker step 27 is fixed to the upper surface of the outer cylindrical pipe 26a. This allows for left and right (row spacing) adjustment, and when the left and right width of the travel transmission case 10 is adjusted, the left and right width of the connecting pipe 26 can also be adjusted by extension or contraction at the same time, which is convenient.

[0060] <Other Examples> The assistant operator riding section 12 may be provided only on the rear wheel transmission case (travel transmission case) 10 on the right side of the seedling transplanter 1. Also, a stand that can maintain the position of the assistant operator riding section 12 by rotating it, like a bicycle stand, may be attached to the step plate section 13. [Explanation of symbols]

[0061] 1 Seedling transplanter 2 Running vehicle 3 Seedling planting machine 3a Seedling planting body 4. Suppression Mechanism 4a Suppression wheel 4b Suppression Rod 4c spring 4d axis branch 4f Support arm 4g connecting plate 5. Mainframe 6 front wheels 7 rear wheels 8 Engine 9 Front step 10. Travel transmission case 11 Lifting cylinder 12. Auxiliary worker boarding section 13 Step board 13a Floor surface 13b Burring hole 13c Inclined section 13d Rear wheel scraper 13e Auxiliary drive wheel scraper 13f Vehicle height interlocking wire 14 Side body part 14a Middle section 15 Auxiliary drive wheels 16 Auxiliary drive wheel transmission mechanism 16a traction output sprocket 16b Transmission chain 16c travel input sprocket 17 Seating area 17a Base pipe 17b Up / down height adjustment pipe 17c Rotating Pipe 17d saddle 17e Push Bolt 18 Notch 19 Rear wheel fender (running wheel fender) 20 Bolt fastening part 21 Stopper 22 Inner side body part 23 Outer side body part 23a Inner Case 23b Outer case 24 Auxiliary drive wheel transmission case 25 tensioner 25a Adjustment hole 25b Bolt with shaft (tension adjuster) 26 Connecting pipe 26a Outer pipe 26b Inner pipe 27 Worker step S Ridge surface sensor

Claims

1. A traveling vehicle body equipped with traveling wheels and configured to be able to travel in a field, a travel transmission case that transmits the driving force of the engine to the travel wheels; A seedling transplanter equipped with a seedling planter for planting seedlings in a field, a seating area for an assistant worker on which an assistant worker can ride is provided at a rear portion of the travel transmission case; The auxiliary worker riding section includes an auxiliary drive wheel that receives the rotational drive force of the running wheel to drive it, and an auxiliary drive wheel transmission case that transmits the rotational drive force of the running wheel to the auxiliary drive wheel, This seedling transplanter is characterized by being equipped with a vehicle height interlocking member for interlocking with the raising and lowering of the vehicle height of the traveling body, and is configured so that when the vehicle height of the traveling body rises, the auxiliary worker riding section moves upward in response and the auxiliary drive wheels move away from the ground.

2. The seedling transplanter according to claim 1, characterized in that the assistant worker boarding section comprises a step board section for the assistant worker to board and a seat section provided on the step board section for the assistant worker to sit on.

Images