Work vehicles

Abstract

To address such a problem that a work vehicle such as a rice planting machine planting seedlings while traveling is well known; however, regarding the work vehicle such as the conventional rice planting machine, it is not completely satisfactorily implemented to reduce the user's burden associated with the enlargement of the work vehicle.SOLUTION: A work vehicle, which plants seedlings while traveling, includes a land-conditioning rotor drive shaft (730) that drives a land-conditioning rotor member (261), with its longitudinal direction being the vehicle body's left-right direction. The outer end of the land-conditioning rotor drive shaft (730) is fixed in a detachable manner to the central portion of the land-conditioning rotor drive shaft (730). A land-conditioning rotor drive shaft suspension tool (735) is also provided to suspend the detached outer end from the central portion.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a work vehicle such as a rice transplanter. [Background technology]

[0002] BACKGROUND ART Work vehicles such as rice planters that plant seedlings while traveling are known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-295128 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the present inventor believes that it is important to reduce the burden on users from various perspectives.

[0005] However, with regard to work vehicles such as the conventional rice transplanters described above, the burden on users that comes with the increase in size of the work vehicles has not necessarily been fully alleviated.

[0006] The present invention has been made in consideration of the above-mentioned conventional problems, and has as its object to provide a work vehicle that can reduce the burden on the user that comes with the increase in size of the work vehicle. [Means for solving the problem]

[0007] The first invention is a work vehicle that plants seedlings while traveling, A ground leveling rotor drive shaft (730) having a longitudinal direction in the left-right direction of the vehicle body for driving the ground leveling rotor member (261), an outer end (730e) of the ground leveling rotor drive shaft (730) is detachably fixed to a central portion (730c) of the ground leveling rotor drive shaft (730); The work vehicle is characterized in that it is provided with a ground leveling rotor drive shaft suspender (735) that suspends the separated outer end portion (730e) from the central portion (730c).

[0008] The second invention is the work vehicle of the first invention, characterized in that the outer end portion (730e) separated from the central portion (730c) is biased to move upward by utilizing the ground leveling rotor drive shaft suspending device (735).

[0009] (delete) [Effects of the Invention]

[0010] The first aspect of the present invention makes it possible to reduce the burden on users that accompanies the increase in size of work vehicles.

[0011] According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to improve convenience.

[0012] (delete) [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a left side view of a rice transplanter according to an embodiment of the present invention; [Figure 2] Block diagram of a rice transplanter according to an embodiment of the present invention [Figure 3] (a) A partial plan view of the vicinity of the seedling planting device of the rice transplanter according to the embodiment of the present invention, (b) A partial rear view of the vicinity of the support frame of the rice transplanter according to the embodiment of the present invention, (c) A partial plan view of the vicinity of the support frame of the rice transplanter according to the embodiment of the present invention [Figure 4] 1 is a partial left side view of the vicinity of a seedling planting device of a rice transplanter according to an embodiment of the present invention; [Figure 5] FIG. 1 is a partial plan view of the vicinity of a reinforcing member of a rice transplanter according to an embodiment of the present invention; [Figure 6]FIG. 1 is a partial left side view of the vicinity of a soil leveling rotor drive shaft suspender of a rice transplanter according to an embodiment of the present invention; [Figure 7] FIG. 1 is a partial plan view of the vicinity of a support frame fixing device and a soil leveling rotor drive shaft fixing device of a rice transplanter according to an embodiment of the present invention; [Figure 8] 1 is a partial plan view of the vicinity of a seedling planting tool drive shaft of a rice transplanter according to an embodiment of the present invention; [Figure 9] (a) An explanatory diagram (part 1) of a folding auxiliary step for a 10-row rice transplanter according to an embodiment of the present invention, (b) An explanatory diagram (part 2) of a folding auxiliary step for a 10-row rice transplanter according to an embodiment of the present invention. [Figure 10] (a) An explanatory diagram (part 3) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of an invention related to the present invention, (b) An explanatory diagram (part 4) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of an invention related to the present invention, (c) An explanatory diagram (part 5) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of an invention related to the present invention. [Figure 11] (a) An explanatory diagram (No. 6) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of the present invention, (b) An explanatory diagram (No. 7) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of the present invention, (c) An explanatory diagram (No. 8) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of the present invention, (d) An explanatory diagram (No. 9) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of the present invention, ( (e) An explanatory diagram (part 10) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of an invention related to the present invention, (f) An explanatory diagram (part 11) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of an invention related to the present invention, (g) An explanatory diagram (part 12) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of an invention related to the present invention, (h) An explanatory diagram (part 13) of a folding auxiliary step for a 10-row rice transplanter of a rice transplanter according to an embodiment of an invention related to the present invention. [Figure 12](a) An explanatory diagram (part 1) of a rear step of a rice transplanter according to an embodiment of the present invention, (b) An explanatory diagram (part 2) of a rear step of a rice transplanter according to an embodiment of the present invention. [Figure 13] (a) An explanatory diagram (part 3) of a rear step of a rice transplanter according to an embodiment of the present invention, (b) An explanatory diagram (part 4) of a rear step of a rice transplanter according to an embodiment of the present invention. [Figure 14] (a) An explanatory diagram (part 1) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention, (b) An explanatory diagram (part 2) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention, (c) An explanatory diagram (part 3) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention, (d) An explanatory diagram (part 4) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention, (e) An explanatory diagram (part 5) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention, (f) An explanatory diagram (part 6) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention, (g) An explanatory diagram (part 7) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention, (h) An explanatory diagram (part 8) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention, (i) An explanatory diagram (part 9) of the folding structure of the seedling frame of the rice transplanter according to an embodiment of the present invention. [Figure 15] (a) An explanatory diagram (part 1) of a rail-type seedling frame of a rice transplanter according to an embodiment of the present invention, (b) An explanatory diagram (part 2) of a rail-type seedling frame of a rice transplanter according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to the drawings, embodiments of the present invention and embodiments of inventions related to the present invention will be described in detail.

[0015] Similarly, some components may not be shown in the drawings, or may be shown in perspective or in an abbreviated form.

[0016] (A) First, the configuration and operation of a rice transplanter according to an embodiment of the present invention will be specifically described with reference to FIGS. 1 to 4.

[0017] Here, Figure 1 is a left side view of a rice transplanter according to an embodiment of the present invention, Figure 2 is a block diagram of a rice transplanter according to an embodiment of the present invention, Figure 3(a) is a partial plan view of the vicinity of the seedling planting device 240 of the rice transplanter according to an embodiment of the present invention, Figure 3(b) is a partial rear view of the vicinity of the support frame 710 of the rice transplanter according to an embodiment of the present invention, Figure 3(c) is a partial plan view of the vicinity of the support frame 710 of the rice transplanter according to an embodiment of the present invention, and Figure 4 is a partial left side view of the vicinity of the seedling planting device 240 of the rice transplanter according to an embodiment of the present invention.

[0018] The rice transplanter of this embodiment is a rice transplanter that travels on a traveling device 220 having a pair of front wheels 221 and rear wheels 222 in accordance with the control of a controller 500 for manual or automatic steering operation on a steering device 230 of the vehicle body 100, levels the field using a ground leveling device 260 having a ground leveling rotor member 261 and a ground leveling float member 262, plants seedlings in the field using a seedling planting device 240, and fertilizes the field using a fertilizer applicator 250.

[0019] The traveling device 220, the seedling planting device 240, the fertilizer applicator 250, and the soil leveling device 260 are driven by the power of the engine 210 transmitted via the main transmission 300 and the sub-transmission 400, which are HSTs.

[0020] The rice transplanter of this embodiment is an example of a work vehicle of the present invention that plants seedlings while traveling.

[0021] The support frame 710 supports multiple seedling planting tools 241, soil leveling rotor members 261, and soil leveling float members 262, which are arranged side by side in the left-right direction of the vehicle body. The longitudinal direction of the support frame 710 is the left-right direction of the vehicle body. The outer ends of the support frame 710 can be folded toward the center of the vehicle body in the left-right direction. The aluminum frame pivot point of the support frame 710 is located on a line determined by the seedling removal amount adjustment lever pivot point of the support member 750 and the reinforcing frame pivot point of the reinforcing member 740 behind the frame of the support member 750. The aluminum frame of the support frame 710 can be folded 90 degrees upward, as indicated by arrow X. Since such folding mechanisms are provided at both outer ends of the support frame 710 in the left-right direction of the vehicle body, both sides of the seedling planting unit can be folded for compact storage.

[0022] The seedling planting tool drive shaft 720 is a component that drives the seedling planting tool 241 and whose longitudinal direction is in the left-right direction of the vehicle body. The outer end of the seedling planting tool drive shaft 720 is removable or foldable toward the center of the vehicle body in the left-right direction. In this embodiment, the outer end of the seedling planting tool drive shaft 720 is foldable toward the center of the vehicle body in the left-right direction. The drive unit universal joint configuration for the seedling planting tool drive shaft 720 allows the drive unit to rotate as the aluminum frame folds. Not only does the drive unit of the seedling planting tool drive shaft 720 need to be removed when folding, but adjustments such as phase alignment are also unnecessary, improving ease of use.

[0023] The ground leveling rotor drive shaft 730 is a member whose longitudinal direction is in the left-right direction of the vehicle body and drives the ground leveling rotor member 261. The outer end of the ground leveling rotor drive shaft 730 is removable, or can be folded toward the center of the vehicle body in the left-right direction of the vehicle body. In this embodiment, the outer end of the ground leveling rotor drive shaft 730 is removable. The ground leveling rotor member 261 can be freely detached from the aluminum frame of the support frame 710, allowing for compact rotor storage.

[0024] The reinforcing member 740 is a member whose longitudinal direction is the left-right direction of the vehicle body and connects and reinforces multiple seedling planting tools 241. The outer end of the reinforcing member 740 is removable or foldable toward the center of the vehicle body in the left-right direction. In this embodiment, the outer end of the reinforcing member 740 is foldable toward the center of the vehicle body in the left-right direction.

[0025] The seedling tray support rail 620 is a rail that supports the seedling tray 610 on which the seedlings to be planted are placed. The support member 750 is a rotatable member whose longitudinal direction is in the left-right direction of the vehicle body, and supports the seedling tray support rail 620 from below so that the distance between the seedling tray 610 and the seedling planting tool 241 can be adjusted. The outer end of the support member 750 is removable or foldable toward the center of the vehicle body in the left-right direction. In this embodiment, the outer end of the support member 750 is foldable toward the center of the vehicle body in the left-right direction.

[0026] Of the four components, the seedling planting tool drive shaft 720, the soil leveling rotor drive shaft 730, the reinforcing member 740, and the support member 750, the outer end of at least one of the components is foldable. The position of the folding portion of at least one component coincides with the position of the folding portion of the support frame 710 in the left-right and up-down directions of the vehicle body. In this embodiment, the outer ends of the seedling planting tool drive shaft 720, the reinforcing member 740, and the support member 750 are foldable, and the positions of the folding portions of at least the reinforcing member 740 and the support member 750 coincide with the position of the folding portion of the support frame 710 in the left-right and up-down directions of the vehicle body. For example, the frame can be secured by tightening a manual folding operation unit 711m, such as a knob, provided below the aluminum frame of the support frame 710, thereby realizing a simple, one-touch operation of folding the support frame by simply turning the knob.

[0027] (B) Next, the configuration and operation of the rice transplanter according to the embodiment of the present invention will be described in more detail.

[0028] (B1) First, explanation will be given mainly with reference to FIG.

[0029] FIG. 5 is a partial plan view of the vicinity of a reinforcing member 740 of the rice transplanter according to the embodiment of the present invention.

[0030] The outer end 620e of the seedling tray support rail 620, which supports the seedling tray 610 and whose longitudinal direction is the left-right direction of the vehicle body, is removably fixed to the central part 620c of the seedling tray support rail 620. When removed from the central part 620c, the outer end 620e can be engaged near a plurality of seedling planting tools 241 arranged side by side in the left-right direction of the vehicle body.

[0031] The outer end 620e of the seedling tray support rail 620 may be attached by using magnet attraction or by using screw fastening.

[0032] The outer end 620e, which is fastened near the seedling planting tools 241, is removably fixed to a reinforcing member 740, whose longitudinal direction is in the left-right direction of the vehicle body, which connects and reinforces the seedling planting tools 241.

[0033] Of course, the outer end portion 620e may be detached from the central portion 620c and then fixed to a location adjacent to the plurality of seedling planting tools 241, such as the central portion 620c.

[0034] A seedling tray support rail fastener 621 is provided to removably fasten the outer end 620e to the central portion 620c. The outer end 620e, which is engaged near the seedling planting tools 241, is removably fastened to the reinforcing member 740 by using the seedling tray support rail fastener 621.

[0035] As shown in Fig. 5, preferably, each of the two outer end portions 620e, such as the so-called side front plates, is fixed by fastening each of the corresponding two seedling tray support rail fasteners 621, such as knob bolts, to nut members 741 provided on the reinforcing member 740. Since the fixing is performed by securely fastening the bolts and nuts, there is almost no risk of the outer end portions 620e, which have been removed from the center portion 620c and stored, falling off the body 100 due to vibration or the like.

[0036] That is, in the riding rice transplanter, the planting section is configured so that the ends of the front plates of the planting section can be removed, and fixing members (nuts and knob bolts) are provided to secure the front plates together so that they can be used. By removing the fixing members, the removed front plate at the end can be attached to the front plate that has not been removed from the planting section, or fixed with the fixing members. This has the effect of preventing falling and damage due to vibration.

[0037] The front board in the center of the planting section is provided with a locking device that locks the removed front board with a fixing member, and the locking device is positioned between multiple planting hooks lined up in the left-right direction, and is configured to lock the left and right front boards so that the front boards at the left and right ends can be fixed.

[0038] (B2) Next, explanation will be given mainly with reference to FIGS.

[0039] Here, Figure 6 is a partial left side view of the vicinity of the soil leveling rotor drive shaft hanging device 735 of a rice transplanter according to an embodiment of the present invention, and Figure 7 is a partial plan view of the vicinity of the support frame fixing device 711 and soil leveling rotor drive shaft fixing device 731 of a rice transplanter according to an embodiment of the present invention.

[0040] An outer end 730e of a ground leveling rotor drive shaft 730, whose longitudinal direction is the left-right direction of the vehicle body and which drives the ground leveling rotor member 261, is detachably fixed to a central portion 730c of the ground leveling rotor drive shaft 730. A ground leveling rotor drive shaft suspender 735 is provided for suspending the outer end 730e detached from the central portion 730c.

[0041] As shown in FIG. 6, preferably, the stored ground leveling rotor member 261 is pulled by a spring-like ground leveling rotor drive shaft hanger 735 attached to the pivot point for storing the side ground leveling rotor, so that it does not sag due to its own weight or the like.

[0042] The outer end 730e, which is separated from the central portion 730c, is biased to move upward by utilizing a terrain grading rotor drive shaft hanger 735.

[0043] When the seedling planting section is stored with the side leveling rotors folded, the side leveling rotors do not droop, which would cause the outer end 730e to spread left and right in the vehicle body, due to the upward spring force indicated by arrow Y. This makes it easy to store the seedling planting section, and the width of the rice transplanter body is unlikely to become larger than the width of the truck bed carrying the rice transplanter as the side leveling rotors rotate.

[0044] In other words, the soil leveling rotor is supported by the planting unit, and by folding the end of the planting unit, the soil leveling rotor also folds. When the end soil leveling rotor is detached from the soil leveling rotor at the base of the planting unit, a member (elastic member) is provided to prevent the soil leveling rotor from sagging under its own weight. This prevents the side rotor from sagging when the planting unit is stored, which was difficult when there was no spring. It also prevents the side rotor from rotating, which would cause the rice transplanter's body width to exceed the width of the truck bed.

[0045] (B3) Next, explanation will be given mainly with reference to FIGS.

[0046] FIG. 8 is a partial plan view of the vicinity of the seedling planting tool drive shaft 720 of the rice transplanter according to the embodiment of the present invention.

[0047] A support frame fixture 711 is provided for foldably fixing an outer end 710e of a support frame 710, the longitudinal direction of which is the left-right direction of the vehicle, to a central portion 710c of the support frame 710, which supports a plurality of seedling planting tools 241 arranged side by side in the left-right direction of the vehicle body. A soil leveling rotor drive shaft fixture 731 is provided for detachably fixing an outer end 730e of a soil leveling rotor drive shaft 730 to a central portion 730c of the soil leveling rotor drive shaft 730. The position of a folding manual operation part 711m of the support frame fixture 711 and the position of a detachment manual operation part 731m of the soil leveling rotor drive shaft fixture 731 are offset relative to the left-right direction of the vehicle body.

[0048] When folding the ground leveling rotor member 261, the locking pin 731p that secures the outer end 730e to the central portion 730c is removed, and then the outer end 730e that has been detached from the central portion 730c is moved away from the center of the vehicle body in the left-right direction by turning the knob-like detachment manual operating part 731m for manually operating the ground leveling rotor knob bolt without a jig, thereby detaching the outer end 730e.

[0049] As shown in Figure 7, a step D is preferably provided between the position of the folding manual operation unit 711m and the position of the detachable manual operation unit 731m. Therefore, when the folding manual operation unit 711m for manually operating the seedling planting unit knob bolt is turned with a finger, the fingers turning the folding manual operation unit 711m are unlikely to interfere with the detachable manual operation unit 731m for manually operating the soil leveling rotor knob bolt, making manual operation of the seedling planting unit knob bolt easy. Similarly, when the detachable manual operation unit 731m is turned with a finger, the fingers turning the detachable manual operation unit 731m are unlikely to interfere with the folding manual operation unit 711m, making manual operation of the soil leveling rotor knob bolt easy.

[0050] As shown in Figure 8, the phase of the two universal joints 721 of the seedling planting tool drive shaft 720 at the seedling planting stop position is preferably oriented in a direction that allows folding of the support frame 710. In order to prevent the phase of the universal joints at the seedling planting stop position from interfering with the folding of the support frame, the drive stop of the seedling planting tool drive shaft 720 for seedling planting transmission is automatically adjusted without the need for troublesome manual drive adjustment, thereby simplifying the work and improving the efficiency of the work associated with folding the support frame.

[0051] That is, a possible configuration is one that includes a fixing operating tool for folding the rotor and a fixing operating tool for folding the planting unit frame, with the fixing tools staggered in plan view, and the universal phase of the folding unit on the planting transmission shaft oriented so that it can be folded at the planting stop position. This provides the effect of making it easier to fold the planting unit and rotor. This also provides the effect of making it easier to turn the knob bolt.

[0052] (C) Next, the configuration and operation of a rice transplanter according to an embodiment of the present invention will be specifically described.

[0053] <Foldable auxiliary step for 10-row rice transplanters> First, the folding auxiliary step for a 10-row rice transplanter will be described with reference mainly to Figures 9(a) and 9(b) and Figures 10(a) to 10(c).

[0054] Here, Figures 9(a) and 9(b) are explanatory diagrams (parts 1 and 2) of a foldable auxiliary step for a 10-row rice transplanter, which is an embodiment of an invention related to the present invention, and Figures 10(a) to 10(c) are explanatory diagrams (parts 3 to 5) of a foldable auxiliary step for a 10-row rice transplanter, which is an embodiment of an invention related to the present invention.

[0055] One possible configuration is to attach a stay to the auxiliary step on the rear side of the aircraft. The rear auxiliary step can be folded and stored, but if the side step auxiliary step cannot be stored without being removed, it may not be possible to transport it by truck. Since it can be attached to the current rear auxiliary step, it can be replaced as a single item, making maintenance easy.

[0056] It is possible to fold it up and store it inside the aircraft body. Because it can be folded and stored, there is no need to remove and reassemble it when working or transporting it.

[0057] Next, the folding auxiliary step for a 10-row rice transplanter will be specifically described with reference mainly to Figures 11(a) to 11(h).

[0058] Here, Figures 11(a) to 11(h) are explanatory diagrams (Nos. 6 to 13) of a folding auxiliary step for a 10-row rice transplanter, which is an embodiment of an invention related to the present invention.

[0059] The stay that mounts the auxiliary step has two pins, and it is possible for the two pins to face outward from the aircraft. By facing the pins outward, the auxiliary step can be slid outward from the aircraft.

[0060] The auxiliary step stay can have three grooves around the pin. The support part of the auxiliary step has a hole for inserting the stay pin, and below that a pin that is inserted into the stay groove. The pin on the stay side serves as the pivot point for the auxiliary step, and the pin on the support side of the auxiliary step can be inserted into the groove on the stay side, allowing the auxiliary step to be fixed at two points.

[0061] One possible way to attach the auxiliary step to the stay is to insert a pin on the stay from the outside of the machine into a hole in the support column, and then insert a spring, washer, and retaining pin only into the pin on the outside of the machine. By removing the retaining pin on the outside, the auxiliary step can be easily removed (facilitating maintenance).

[0062] Even if the step is slid to the outside of the aircraft, the spring allows it to easily slide back inside the aircraft.

[0063] Furthermore, when the auxiliary step is folded by rotating it around the pin on the stay side as a fulcrum, the spring prevents the pin on the step side from sliding outwards when it is inserted into the groove on the stay side.

[0064] The following folding methods are possible: (1) Pull the auxiliary step outward and remove the pin from the groove in the stay, (2) rotate the auxiliary step 90 degrees, slide it toward the inside of the vehicle, and insert the pin into the groove, and (3) fold the rear auxiliary step. Folding is easy.

[0065] Furthermore, since it is easy to fold, it is also easy to unfold.

[0066] Next, the folding auxiliary step for a 10-row rice transplanter will be described in more detail, mainly with reference to Figures 9(a) and 9(b) and Figures 10(a) to 10(c).

[0067] A possible configuration is one in which a pipe is attached to the inside of the auxiliary step. The pipe rests on the step plate of the side step, thereby supporting the auxiliary step.

[0068] When folded, the pipe section acts as a handrail, making it easier to get on and off.

[0069] Furthermore, when folded, seedling picking boards and small items can be hung on the pipe section.

[0070] <Rear step> First, the rear step will be described with reference mainly to FIGS. 12(a) and 12(b).

[0071] Here, FIGS. 12(a) and 12(b) are explanatory diagrams (parts 1 and 2) of a rear step of a rice transplanter according to an embodiment of the invention related to the present invention.

[0072] One possible configuration is one in which the front ends of the side steps extend further forward than the front end of the main rear step. This is a configuration that can be folded inward. In a configuration in which the front ends of the side steps and the main rear step are the same, there is no working space when replenishing seedlings in the seedling tanks at both ends, making the work difficult. If the side steps are removable, there may be no place to put the side steps after removal. By expanding the working space at both ends, workability is improved. Because the side steps are foldable, storage work during transportation is easier.

[0073] Next, the rear step will be specifically described with reference mainly to FIGS. 13(a) and 13(b).

[0074] Here, Figures 13(a) and 13(b) are explanatory diagrams (parts 3 and 4) of the rear step of the rice transplanter according to the embodiment of the invention related to the present invention.

[0075] In the above-mentioned configuration, it is possible to consider a configuration in which the height of the extended side step is intermediate between the main step and the rear step. This is also a configuration in which the side step can be folded inward.

[0076] <Folding structure of seedling frame> First, the folding structure of the seedling frame will be described with reference mainly to Figures 14(a) and 14(b).

[0077] Here, Figures 14(a) and 14(b) are explanatory diagrams (parts 1 and 2) of the folding structure of the seedling frame of the rice transplanter according to the embodiment of the invention related to the present invention.

[0078] Regarding the configuration of current seedling frames, etc., (1) force is sometimes required to rotate the extension seedling rail, and (2) when stored, the support stays connecting the rail to the main frame are not strong enough, which can lead to damage due to vibrations, etc. when moving (transporting).

[0079] Next, the folding structure of the seedling frame will be specifically described with reference mainly to Figures 14(c) to 14(e).

[0080] Here, Figures 14(c) to 14(e) are explanatory diagrams (parts 3 to 5) of the folding structure of the seedling frame of the rice transplanter according to the embodiment of the invention related to the present invention.

[0081] A configuration is conceivable in which the extension seedling rail portion can be switched from a horizontal state to a vertical state (storage) along a guide or the like.

[0082] One possible configuration is to attach a folding lever to the extended seedling rail section, allowing the operator to easily change to the working state by standing on the step and pulling up and rotating the extended seedling rail section (this is a means of the above-mentioned configuration).

[0083] The folding lever is vertical when stored, and can be configured to double as a handrail when the operator ascends or descends (when stored, the folding lever / handrail is configured in a position that extends in the vertical direction of the aircraft).

[0084] Next, the folding structure of the seedling frame will be described in more detail, mainly with reference to Figures 14(f) and 14(g).

[0085] Here, Figures 14(f) and 14(g) are explanatory diagrams (Nos. 6 and 7) of the folding structure of the seedling frame of the rice transplanter according to the embodiment of the invention related to the present invention.

[0086] One possible configuration is to provide an insertion pin at the end of the extended seedling rail, and a hole in the step section to ensure rigidity using a countersunk structure. When stored on the left and right, the rail section becomes a box, preventing damage during movement (transportation).

[0087] Next, the folding structure of the seedling frame will be described in more detail, mainly with reference to Figures 14(h) and 14(i).

[0088] Here, Figures 14(h) and 14(i) are explanatory diagrams (Nos. 8 and 9) of the folding structure of the seedling frame of the rice transplanter according to the embodiment of the invention related to the present invention.

[0089] Regarding the above-mentioned embodiment, an embodiment can be considered in which an extension step or the like is constrained to the seedling rail portion that has become a box when stored.

[0090] <Rail-type seedling frame> The rail-type seedling frame will be described mainly with reference to Figures 15(a) and 15(b).

[0091] Here, FIGS. 15(a) and 15(b) are explanatory diagrams (parts 1 and 2) of a rail-type seedling frame of a rice transplanter according to an embodiment of the invention related to the present invention.

[0092] It is also possible to provide a rail in the middle between the front and rear rails of the rail-type seedling frame. In a configuration with only front and rear rails, seedlings or seedling boxes may fall between the rails, but this makes it less likely that seedlings or seedling boxes will fall between the rails.

[0093] A rail-type seedling frame can also have a rail installed in the middle of the front and rear rails. The rail installed in the middle can be offset in the front-to-rear direction. In a configuration with only front and rear rails, seedlings and seedling boxes can fall between the rails, making it difficult to replenish seedlings unless an auxiliary vehicle can fit between the rails. However, this makes it less likely that seedlings or seedling boxes will fall between the rails. By offsetting the rails, an auxiliary vehicle can fit in when replenishing seedlings.

[0094] The rail in the middle rotates. By rotating the rail, an auxiliary vehicle can enter when replenishing seedlings. Because the rail rotates, the front-to-back position of the rail does not change, so there is no need to return it to its original position.

[0095] The rail in the middle can be offset in the front-to-back direction. The rail is designed to lock when it is in the center position between the front and back. When it locks, you know that it has been returned to its original position.

[0096] That is, the rice transplanter according to the invention related to the present invention is, for example, the following rice transplanter.

[0097] The rice transplanter of the invention related to the present invention is provided with a step at the rear of the machine body to expand the area of the floor step in the left-right direction of the machine body as needed, and an expanded step that protrudes the front step in the left-right direction by the amount of the expanded step, and one of the support parts (pipe part) that supports this expanded step is supported by the boarding step for getting on and off the machine. Large rice transplanters such as those with 10 rows are equipped with an auxiliary wide step that is deployed and used as needed, but this step was previously only equipped on the rear step of the machine body, but by providing it on the front step of the machine body as well, it becomes wider and can be removed or folded when not needed, which is an advantage.

[0098] The rice transplanter of this invention related to the present invention is provided with a boarding step for getting on and off on the other side where the support part of the expansion step is located, and a fixing device for fixing the expansion step is formed on the step at the rear of the machine body.

[0099] Another invention related to the present invention is a rice transplanter equipped with auxiliary seedling frames extending in the left-right direction of the machine body, which are foldable and rotate downward at the end of the machine body, with the end of the field seedling frame fixed to a floor step. By folding the auxiliary seedling frames downward, seedlings can be placed in the center of the machine body of the auxiliary seedling frames, which improves workability.

[0100] In another rice transplanter related to the present invention, the auxiliary seedling frame that is folded downwards uses a step for expanding the machine body in the left-right direction as a fixing device when folding the step at the rear of the machine body inside the machine body. [Industrial Applicability]

[0101] The work vehicle of the present invention can reduce the burden on the user that comes with the increase in size of work vehicles, and is useful for use in work vehicles such as rice transplanters. [Explanation of symbols]

[0102] 100 body 210 engine 220 Running gear 221 Front wheel 222 rear wheel 230 Controls 240 Seedling planting device 241 Seedling planting tools 250 Fertilizer equipment 260 Ground leveling equipment 261 Ground leveling rotor parts 262 Leveling float member 300 Main Transmission 400 sub-transmission 500 Controller 610 Seedling stand 620 Seedling tray support rail 620c central part 620e outer end 621 Seedling tray support rail fixing device 710 Support Frame 710c central part 710e outer end 711 Support frame fixings 711m Folding manual operation unit 720 Seedling planting tool drive shaft 721 Universal Joint 730 Leveling rotor drive shaft 730c central part 730e outer end 731 Ground leveling rotor drive shaft fixing device 731m Separation manual operation section 731p Locking pin 735 Ground leveling rotor drive shaft suspender 740 Reinforcement members 741 Nut material 750 Support member D. Different levels X, Y arrows

Claims

1. A work vehicle that plants seedlings while traveling, A ground leveling rotor drive shaft (730) having a longitudinal direction in the left-right direction of the vehicle body for driving the ground leveling rotor member (261), an outer end (730e) of the ground leveling rotor drive shaft (730) being detachably fixed to a central portion (730c) of the ground leveling rotor drive shaft (730); A work vehicle characterized in that a ground leveling rotor drive shaft suspender (735) is provided for suspending the separated outer end portion (730e) from the central portion (730c).

2. 2. The work vehicle according to claim 1, wherein the outer end portion (730e) separated from the central portion (730c) is biased to move upward by utilizing the ground leveling rotor drive shaft suspender (735).

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