Work vehicle

Abstract

To solve a problem of a conventional work machine such as a transplanter where a work of supplying a seedling from an auxiliary seedling frame to a seedling placement device is not always easy, which made the present inventor consider that there will be an increasing trend of installing convenient functions to a work machine such as a rice transplanter and a seedling transplanter one after another in consideration of various needs of a user.SOLUTION: A transplanter includes: a seedling planting device 10 for planting a seedling on the field; and a seedling placement device 20 for placing the seedling to be planted. The seedling placement device 20 includes: a seedling placement frame unit 21 attached to a vehicle body; and a plurality of seedling placement stand parts 22 movably attached to the seedling placement frame unit 21. The plurality of seedling placement stand parts 22 can move to reciprocate in a vehicle body right-left direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A work vehicle such as a transplanter is known which is equipped with a spare seedling loading platform that is movable from side to side above the vehicle body and on which seedlings are placed, and a seedling loading device supported on the rear side of the vehicle body and on which seedlings are placed when planting, and the seedlings can be loaded by sliding from the rear end of the spare seedling loading platform onto the seedling loading device (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-132613 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the present inventor believes that the trend of incorporating convenient functions into work vehicles such as rice planters or seedling transplanters in succession, taking into consideration the various needs of users, will continue to accelerate.

[0005] However, the inventors have noticed that such work vehicles are not necessarily easy to use when using convenient functions.

[0006] More specifically, the inventors have noticed that with a work vehicle such as a conventional transplanter, for example, it is not always easy to supply seedlings from an auxiliary seedling frame to a seedling loading device.

[0007] SUMMARY OF THE INVENTION In consideration of the above-mentioned problems inherent in the prior art, the present invention has an object to provide a work vehicle that can improve usability. [Means for solving the problem]

[0008] The first aspect of the present invention is a work vehicle equipped with a seedling planting device that plants seedlings in a field and a seedling loading device that loads the seedlings to be planted, The seedling-loading device has a seedling-loading frame unit attached to a vehicle body, and a plurality of seedling-loading trays movably attached to the seedling-loading frame unit, This is a work vehicle characterized in that the multiple seedling loading tray sections are each capable of moving back and forth in the left and right directions of the vehicle body.

[0009] The second aspect of the present invention is a left seedling tray and a right seedling tray arranged side by side in the left-right direction of the vehicle body, The seedling-carrying frame unit has a left seedling-carrying frame part and a right seedling-carrying frame part arranged side by side in the left-right direction of the vehicle body, The left seedling-mounting table is attached to the left seedling-mounting frame so as to be movable in the left-right direction of the vehicle body, The right seedling-mounting table is attached to the right seedling-mounting frame so as to be movable in the left-right direction of the vehicle body, The first aspect of the present invention is a work vehicle characterized in that the left seedling-loading frame section and the right seedling-loading frame section can be raised and lowered independently in the vertical direction.

[0010] The third invention is a work vehicle according to the second invention, characterized in that the upper edge of the seedling-carrying frame unit is formed as a seedling guide portion that guides the seedlings placed on it downward.

[0011] The fourth aspect of the present invention is a work vehicle according to the second aspect of the present invention, characterized in that the upper edge of the seedling loading platform is formed as a seedling guide portion that guides the loaded seedlings downward.

[0012] The fifth aspect of the present invention is a work vehicle according to the third aspect of the present invention, characterized in that when the seedling loading section on the left side moves to the left, the seedling loading section on the right side moves to the right, and when the seedling loading section on the left side moves to the right, the seedling loading section on the right side moves to the left.

[0013] The sixth aspect of the present invention is a work vehicle according to the fifth aspect of the present invention, characterized in that when the seedling loading trays are stopped for seedling replenishment, the stopping positions of the left and right seedling loading trays are both shifted toward the center of the vehicle body, or the stopping position of the left seedling loading tray is shifted toward the left side of the vehicle body so as to coincide with the position of the left auxiliary seedling frame, and the stopping position of the right seedling loading tray is shifted toward the right side of the vehicle body so as to coincide with the position of the right auxiliary seedling frame.

[0014] The seventh aspect of the present invention is the work vehicle of the sixth aspect of the present invention, characterized in that the seedling guide section is formed rotatable so that the height of the upper edge of the seedling guide section can be adjusted according to the seedling slide insertion height for seedling supply.

[0015] The eighth aspect of the present invention is a method for growing seedlings, the seedlings being planted in ridges formed in the field, The seventh aspect of the present invention is a work vehicle, characterized in that the plurality of seedling carrying tray sections can be raised and lowered according to the ridge height of the ridges.

[0016] The ninth aspect of the present invention is a method for manufacturing a ridge-forming machine, comprising: a pair of left and right suppression wheels for suppressing the surface of the ridge; and a pair of left and right suppression wheel stays attached to the suppression wheel frame; The suppressor wheel stay has a suppressor wheel stay upper member and a suppressor wheel stay lower member, the crushing wheel stay upper member is attached to the crushing wheel frame so as to be rotatable about a rotation axis in the front-rear direction of the vehicle body, the suppressed wheel stay lower member is attached to the suppressed wheel stay upper member so as to be slidable in the left-right direction of the vehicle body, In a work vehicle according to an eighth aspect of the present invention, the crushing wheels are held by the crushing wheel stay lower side members.

[0017] In a tenth aspect of the present invention, the shape of the crushing wheel frame is a substantially U-shape, The pair of left and right suppression wheel stays are attached to both tip ends of the approximately U-shaped portion of the suppression wheel frame, a part of the substantially U-shaped bottom of the wheel suppression frame is attached to the vehicle body so as to be rotatable around a rotation axis in the left-right direction of the vehicle body; A wheel suppression lever is attached to the vehicle body and abuts against one of the two legs of the approximately U-shaped wheel suppression frame from below, thereby lifting the pair of left and right wheels upward and storing them, In a work vehicle according to a ninth aspect of the present invention, the pair of left and right crushing wheels are connected to each other. [Effects of the Invention]

[0018] The first aspect of the present invention makes it possible to improve usability.

[0019] 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 further improve usability.

[0020] According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, it is possible to improve convenience.

[0021] According to the fourth aspect of the present invention, in addition to the effect of the second aspect of the present invention, it is possible to improve convenience.

[0022] According to the fifth aspect of the present invention, in addition to the effect of the third aspect of the present invention, it is possible to improve reliability.

[0023] According to the sixth aspect of the present invention, in addition to the effect of the fifth aspect of the present invention, it is possible to further improve reliability.

[0024] According to the seventh aspect of the present invention, in addition to the effects of the sixth aspect of the present invention, it is possible to improve practicality.

[0025] According to the eighth aspect of the present invention, in addition to the effects of the seventh aspect of the present invention, it is possible to further improve practicality.

[0026] According to the ninth aspect of the present invention, in addition to the effect of the eighth aspect of the present invention, it is possible to simplify the configuration.

[0027] According to the tenth aspect of the present invention, in addition to the effect of the ninth aspect of the present invention, it is possible to reduce the burden on the worker. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a perspective view of a transplanter according to an embodiment of the present invention; [Figure 2] FIG. 1 is a left side view of a transplanter according to an embodiment of the present invention. [Figure 3] 1 is a rear view of a transplanter according to an embodiment of the present invention; [Figure 4] 1 is a perspective view of a transplanter according to an embodiment of the present invention (part 2); [Figure 5] 1 is a rear view of a transplanter according to an embodiment of the present invention (part 2) [Figure 6] FIG. 1 is a perspective view (part 1) of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 7] FIG. 2 is a perspective view of a transplanter according to a first modified example of an embodiment of the present invention; [Figure 8] FIG. 1 is a left side view (part 1) of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 9] FIG. 1 is a plan view (part 1) of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 10] FIG. 1 is a rear view (part 1) of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 11] FIG. 3 is a perspective view of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 12]FIG. 2 is a left side view (part 2) of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 13] FIG. 2 is a plan view (part 2) of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 14] FIG. 4 is a perspective view of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 15] FIG. 3 is a plan view of a transplanter according to a first modified example of an embodiment of the present invention. [Figure 16] FIG. 1 is a perspective view of a transplanter according to a second modified example of an embodiment of the present invention; [Figure 17] FIG. 2 is a perspective view of a transplanter according to a second modified example of an embodiment of the present invention; [Figure 18] FIG. 1 is a rear view (part 1) of a transplanter according to a second modified example of an embodiment of the present invention. [Figure 19] FIG. 1 is a plan view of a transplanter according to a second modified example of an embodiment of the present invention. [Figure 20] FIG. 1 is a left side view (part 1) of a transplanter according to a second modified example of an embodiment of the present invention. [Figure 21] FIG. 3 is a perspective view of a transplanter according to a second modified example of an embodiment of the present invention; [Figure 22] FIG. 4 is a perspective view of a transplanter according to a second modified example of an embodiment of the present invention. [Figure 23] FIG. 1 is a perspective view of a transplanter according to a third modified example of an embodiment of the present invention; [Figure 24] FIG. 10 is a left side view of a transplanter according to a third modified example of the embodiment of the present invention. [Figure 25] FIG. 10 is a rear view of a transplanter according to a third modified example of the embodiment of the present invention. [Figure 26] FIG. 2 is a perspective view (part 2) of a transplanter according to a third modified example of an embodiment of the present invention. [Figure 27] FIG. 3 is a perspective view of a transplanter according to a third modified example of an embodiment of the present invention; [Figure 28] 10 is a schematic plan view of a transplanter according to a third modified example of an embodiment of the present invention. [Figure 29] 10 is a schematic left side view (part 1) of a transplanter according to a fourth modified example of an embodiment of the present invention. [Figure 30] 10 is a schematic rear view of a transplanter according to a fourth modified example of an embodiment of the present invention. [Figure 31] 10 is a schematic left side view (part 2) of a transplanter according to a fourth modified example of an embodiment of the present invention. [Figure 32] 10 is a schematic left side view (part 3) of a transplanter according to a fourth modified example of an embodiment of the present invention. [Figure 33] 4 is a schematic left side view (part 4) of a transplanter according to a fourth modified example of an embodiment of the present invention. [Figure 34] FIG. 10 is a schematic perspective view of a transplanter according to a fourth modified example of the embodiment of the present invention. [Figure 35] 10 is a schematic perspective view (part 1) of a transplanter according to a fifth modified example of an embodiment of the present invention. [Figure 36] (a) A schematic perspective view (part 2) of a transplanter according to a fifth modified embodiment of the present invention, (b) a schematic rear view (part 1) of a transplanter according to a fifth modified embodiment of the present invention, and (c) a schematic rear view (part 2) of a transplanter according to a fifth modified embodiment of the present invention. [Figure 37] FIG. 11 is a perspective view of a transplanter according to a sixth modified example of an embodiment of the present invention. [Figure 38] FIG. 2 is a perspective view of a transplanter according to a sixth modified example of an embodiment of the present invention; [Figure 39] FIG. 10 is a perspective view (part 3) of a transplanter according to a sixth modified example of the embodiment of the present invention. [Figure 40] FIG. 4 is a perspective view of a transplanter according to a sixth modified example of an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings.

[0030] Similarly, some components may not be shown in the drawings, or may be shown in perspective or in simplified form.

[0031] While explaining the operation of the transplanter according to the embodiment of the present invention, we will also explain a work vehicle operation control method according to the invention, which is realized by a controller and the like.

[0032] The transplanter of the embodiment of the present invention is a work vehicle having a seedling planting device 10 for planting seedlings in a field and a seedling loading device 20 for loading the seedlings to be planted, and is a specific example of the work vehicle of the present invention.

[0033] (1) First, the configuration and operation of a transplanter according to an embodiment of the present invention will be specifically described with reference to FIGS. 1 to 5.

[0034] Here, Figure 1 is an oblique view (part 1) of a transplanter according to an embodiment of the present invention, Figure 2 is a left side view of a transplanter according to an embodiment of the present invention, Figure 3 is a rear view (part 1) of a transplanter according to an embodiment of the present invention, Figure 4 is an oblique view (part 2) of a transplanter according to an embodiment of the present invention, and Figure 5 is a rear view (part 2) of a transplanter according to an embodiment of the present invention.

[0035] The seedling-loading device 20 has a seedling-loading frame unit 21 attached to the vehicle body, and a plurality of seedling-loading trays 22 movably attached to the seedling-loading frame unit 21. The plurality of seedling-loading trays 22 can each move back and forth in the left-right direction of the vehicle body.

[0036] The number of seedling-carrying base portions 22 is two or three or more.

[0037] In the embodiment of the present invention, the plurality of seedling-carrying trays 22 are a left seedling-carrying tray 22 and a right seedling-carrying tray 22 arranged side by side in the left-right direction of the vehicle body.

[0038] The upper edge of the seedling-placing table 22 is formed as a seedling guide 23 that guides the seedlings placed on it downward.

[0039] That is, for example, when an operator supplies seedlings from an auxiliary seedling frame 30 or the like to the seedling placing device 20, the seedlings are placed on the seedling guide section 23, and the seedlings placed on the seedling guide section 23 are guided downward.

[0040] As shown in Figs. 6 to 15, the upper edge of the seedling-loading frame unit 21 may be formed as a seedling guide portion 23 that guides the seedlings loaded downward.

[0041] Here, Figures 6 and 7 are oblique views (parts 1 and 2) of a transplanter of a first modified embodiment of the present invention, Figure 8 is a left side view (part 1) of a transplanter of a first modified embodiment of the present invention, Figure 9 is a plan view (part 1) of a transplanter of a first modified embodiment of the present invention, Figure 10 is a back view (part 1) of a transplanter of a first modified embodiment of the present invention, Figure 11 is an oblique view (part 3) of a transplanter of a first modified embodiment of the present invention, Figure 12 is a left side view (part 2) of a transplanter of a first modified embodiment of the present invention, Figure 13 is a plan view (part 2) of a transplanter of a first modified embodiment of the present invention, Figure 14 is an oblique view (part 4) of a transplanter of a first modified embodiment of the present invention, and Figure 15 is a plan view (part 3) of a transplanter of a first modified embodiment of the present invention.

[0042] When the left seedling placing table 22 moves leftward, the right seedling placing table 22 moves rightward, and when the left seedling placing table 22 moves rightward, the right seedling placing table 22 moves leftward.

[0043] As shown in Fig. 29, a schematic left side view (part 1) of a transplanter according to a fourth modified embodiment of the present invention, and Fig. 30, a schematic rear view of a transplanter according to a fourth modified embodiment of the present invention, in a so-called fully automatic, ride-on, two-row vegetable transplanter, the lateral feed directions of the left and right seedling loading platforms 22 are opposite to each other. Even when fairly heavy seedlings are placed on the seedling loading device 20 and planted, the left and right weight balance is good, which prevents large vehicle body vibrations in the steering unit 110 and other components, and stabilizes planting operations.

[0044] When the seedling loading trays 22 are stopped for seedling replenishment, the stopping positions of the left and right seedling loading trays 22 are either both shifted toward the center of the vehicle body, or the stopping position of the left seedling loading tray 22 is shifted toward the left side of the vehicle body so as to coincide with the position of the left auxiliary seedling frame 30, and the stopping position of the right seedling loading tray 22 is shifted toward the right side of the vehicle body so as to coincide with the position of the right auxiliary seedling frame 30.

[0045] The seedling loading platform 22 is positioned at the center of the vehicle body, i.e., the left seedling loading platform 22 is positioned at the right end of the range of lateral feed movement, and the right seedling loading platform 22 is positioned at the left end of the range of lateral feed movement. The operator sitting in the central operating seat can easily feed seedlings from the auxiliary seedling frame 30 or the like to the seedling loading device 20.

[0046] As shown in Figure 31, which is a schematic left side view (part 2) of a transplanter according to a fourth modified embodiment of the present invention, two or more auxiliary seedling frames 30 can be aligned vertically as a set, but the vertical positions of the left and right sets that are deployed and moved horizontally side by side in a manner similar to that of a so-called electric seedling rail driven by a motor 100 are approximately the same. Even when six or more seedling frames are used, the electric seedling rail configuration can be used, and the complexity of the configuration that accompanies an increase in the number of seedling frames can be avoided.

[0047] The left and right auxiliary seedling frames 30 are positioned on the left and right sides of the seat in the fore-and-aft direction of the vehicle body. Even if the vehicle body shakes during planting work, the auxiliary seedling frames 30 function as support, so the worker will almost never fall off the seat.

[0048] The seedling guide portion 23 is formed to be rotatable so that the height of the upper edge of the seedling guide portion 23 can be adjusted according to the height at which the seedling slide is inserted for seedling supply.

[0049] As shown in Figure 32, which is a schematic left side view (part 3) of a transplanter according to a fourth modified embodiment of the present invention, when the auxiliary seedling frames 30 aligned vertically are moved horizontally and the seedling loading device 20 acting as a seedling supply device is raised and moved toward the front of the vehicle, the height of the upper side of the auxiliary seedling frames 30 at the rear of the vehicle is adjusted to be approximately the same as the height of the seedling guide section 23 acting as the seedling tray insertion section of the seedling loading device 20. By sliding the seedling tray rearward from the auxiliary frame 30, the seedling tray removed from the auxiliary frame 30 can be easily inserted into the seedling guide section 23.

[0050] As described above, the stopping position of the left seedling loading tray 22 is shifted to the left side of the vehicle body so as to coincide with the position of the left auxiliary seedling frame 30, and the stopping position of the right seedling loading tray 22 is shifted to the right side of the vehicle body so as to coincide with the position of the right auxiliary seedling frame 30. As a result, the left and right seedling loading trays 22 are moved to the left and right ends of the lateral feed movement range so as to be positioned approximately in line with the positions of the left and right auxiliary seedling frames 30. The seedling trays are slid from the auxiliary seedling frame 30 and inserted into the seedling guide section 23 without being lifted out of the auxiliary seedling frame 30 and removed.

[0051] As shown in Figure 33, which is a schematic left side view (part 4) of a transplanter according to a fourth modified embodiment of the present invention, a pivot pin member 102 is provided on the seedling tray inserting member 101 of the seedling guide section 23, and the height position of the seedling tray inserting member 101 can be adjusted according to the height positions of the multiple auxiliary seedling frames 30 arranged vertically. The seedling trays are slid from the auxiliary seedling frames 30 and fed to the seedling loading device 20, making seedling supply easy.

[0052] As shown in Figure 34, a schematic perspective view of a transplanter according to a fourth embodiment of the present invention, the pivot pin 102 inserted into the elongated hole 103 can slide in the longitudinal direction of the vehicle body. The locking pin 104 engages with grooves 106 provided on the upper and lower sides of the frame plate 105 of the seedling loading device 20, thereby fixing the seedling tray inserting member 101 in place by pivoting it to the height of one of the auxiliary seedling frames 30. A stopper plate 107 extending from the frame plate 105 acts as a stopper to prevent the seedling tray inserting member 101 from pivoting downward toward the lower auxiliary seedling frame 30. The pivoting and adjusting operations for the seedling tray inserting member 101 using the seedling tray inserting member pulling step, seedling tray inserting member pivoting step, and seedling tray inserting member pushing step can be easily performed with one hand.

[0053] The pivot pin member 102 and the locking pin member 104 protrude outward from the seedling loading device 20 so that both ends of the tension spring 108 can be fitted in. When the user pulls and rotates the seedling tray loading member 101 and then releases the seedling tray loading member 101, the above-mentioned seedling tray loading member pushing step is automatically performed with the assistance of the tension spring 108, facilitating the rotation adjustment operation of the seedling tray loading member 101. As the tension spring 108 constantly biases the pivot pin member 102 and the locking pin member 104 in this way, the locking pin member 104 is almost never unintentionally disengaged due to vehicle vibration or the like.

[0054] A handle member 109 is provided on the side plate of the seedling tray insertion member 101. The handle member 109 has good visibility, which facilitates the rotation adjustment operation of the seedling tray insertion member 101.

[0055] The handle member 109 is attached so that the grip portion faces the inside of the vehicle body, so that an operator who operates the vehicle can easily grip the handle member 109.

[0056] The GPS receiver frame is constructed from sturdy square pipes and other materials, and the sun visor is attached to stays extending from the left and right ends of the GPS receiver frame at a position behind the GPS receiver. The sun visor functions as a rain and sunshade, allowing for comfortable work. The sun visor and stays are positioned so as not to interfere with GPS transmission and reception operations, improving the reliability of the autonomous driving and driving assistance functions.

[0057] As shown in Figures 16 to 28, the seedling-carrying frame unit 21 may also have a left seedling-carrying frame portion 21a and a right seedling-carrying frame portion 21a arranged side by side in the left-right direction of the vehicle body.

[0058] 16 and 17 are oblique views (parts 1 and 2) of a transplanter according to a second modified embodiment of the present invention, FIG. 18 is a rear view (part 1) of a transplanter according to a second modified embodiment of the present invention, FIG. 19 is a plan view (part 1) of a transplanter according to a second modified embodiment of the present invention, FIG. 20 is a left side view (part 1) of a transplanter according to a second modified embodiment of the present invention, FIGS. 21 and 22 are oblique views (parts 3 and 4) of a transplanter according to a second modified embodiment of the present invention, FIG. 23 is an oblique view (part 1) of a transplanter according to a third modified embodiment of the present invention, FIG. 24 is a left side view of a transplanter according to a third modified embodiment of the present invention, FIG. 25 is a rear view of a transplanter according to a third modified embodiment of the present invention, FIGS. 26 and 27 are oblique views (parts 2 and 3) of a transplanter according to a third modified embodiment of the present invention, and FIG. 28 is a schematic plan view of a transplanter according to a third modified embodiment of the present invention.

[0059] The left seedling loading platform 22 is attached to the left seedling loading frame 21a so that it can move left and right on the vehicle body. The right seedling loading platform 22 is attached to the right seedling loading frame 21a so that it can move left and right on the vehicle body. The left seedling loading frame 21a and the right seedling loading frame 21a can be raised and lowered independently of each other in the vertical direction.

[0060] In the traveling mechanism 201, the power generated by the engine 203 is changed in speed by a traveling transmission device 206 using an HST, and is then output via a transmission output shaft to the left and right front wheels 204 and rear wheels 205, as well as to the seedling planting mechanism 202, which is raised and lowered by left and right hydraulic cylinder devices 207 with lift arms. In the seedling planting mechanism 202, this input power is output from the cross-feed transmission device via a gear case 208 to cross-feed lead cams 209 for the left and right seedling loading tables 210, as well as to left and right seedling planting units 211 with seedling planting hoppers 212 and seedling pickers 213.

[0061] A single drive shaft system is adopted for the drive system of the left and right seedling trays 210. It is easy to realize a configuration that can synchronize and adjust the drive timing of the horizontal and vertical feed of the left and right seedling trays 210 all at once.

[0062] A single drive shaft system is also used for the drive systems of the left and right seedling planting hoppers 212. This makes it easy to realize a configuration that can collectively synchronize and adjust the drive timing of the horizontal and vertical feeds of the left and right seedling planting hoppers 212.

[0063] A single drive shaft system is also adopted for the drive systems of the left and right seedling picking devices 213. It is easy to realize a configuration that can collectively synchronize and adjust the drive timing of the horizontal and vertical feeds of the left and right seedling picking devices 213.

[0064] A so-called end-of-row sensor is located in front of the ground wheel at the seedling planting section. Since seedlings can be planted close to the end of the row, supplementary planting is rarely required.

[0065] The drive power for the left and right seedling trays 210, the seedling planting hoppers 212, and the seedling removal device 213 is input from a single drive shaft and then output separately to the left and right. Since the drive timing of the left and right seedling planting units can be set independently, staggered planting can be easily achieved.

[0066] (2) Next, the configuration and operation of the transplanter according to the embodiment of the present invention will be described in more detail, mainly with reference to Figures 35 and 36(a) to 36(c).

[0067] Here, Figure 35 is a schematic oblique view (part 1) of a transplanter according to a fifth modified embodiment of the present invention, Figure 36(a) is a schematic oblique view (part 2) of a transplanter according to a fifth modified embodiment of the present invention, and Figures 36(b) and 36(c) are schematic rear views (parts 1 and 2) of a transplanter according to a fifth modified embodiment of the present invention.

[0068] The seedlings are planted in ridges formed in a field. The seedling-carrying tables 22 can be raised and lowered according to the height of the ridges.

[0069] As shown in Figure 35, the crushing wheels 40 attached to the main frame 301 press down on the base of the planted seedlings. The member connecting the left and right crushing wheel stays 41 is located further forward on the vehicle than the seedling planting position, reducing the impact of the seedling's width and height. Weights 302 are attached to each of the left and right crushing wheel stays 41, making it less likely that the crushing load will be uneven. The crushing wheels 40, which are made up of multiple small-diameter crushing roller members, are positioned lower than the first leaf, which is the lowest leaf of the planted seedling, and penetrate under the leaf to crush the root ball of the planted seedling. The number of crushing roller members can be changed depending on the type and stem size of the seedling being planted.

[0070] A pair of left and right suppressing wheels 40 that suppress the surface of the ridges are attached to a suppressing wheel frame 42 via a pair of left and right suppressing wheel stays 41. The suppressing wheel stay 41 has an upper suppressing wheel stay member 41a and a lower suppressing wheel stay member 41b. The upper suppressing wheel stay member 41a is attached to the suppressing wheel frame 42 so as to be rotatable about a rotation axis in the fore-and-aft direction of the vehicle body. The lower suppressing wheel stay member 41b is attached to the upper suppressing wheel stay member 41a so as to be slidable in the left-right direction of the vehicle body. The suppressing wheels 40 are held by the lower suppressing wheel stay member 41b.

[0071] As shown in Figure 36(a), when planting large vegetable seedlings, it is desirable to compress the root ball of the seedling. A compression wheel 40, consisting of multiple small-diameter compression roller members, can compress the root ball at the minimum distance so as not to interfere with the seedling's stem. The diameter of the compression wheel 40 is large enough to fit between the seedling's first leaf and the root ball, and the compression position is below the leaf.

[0072] As shown in Figure 36(b), the roller holding hole formed in the suppressing wheel 40 is inserted into a substantially L-shaped pin member of the suppressing wheel stay lower member 41b. Because the suppressing wheel 40 is composed of multiple suppressing roller members, it is easy to realize a configuration in which the distance from the suppressing position in the left-right direction of the vehicle where the suppressing wheel stay lower member 41b is located can be flexibly changed depending on the size of the seedling leaves. Because the suppressing wheel stay lower member 41b can slide in the left-right direction of the vehicle, the lateral position of the suppressing wheel stay lower member 41b can be adjusted according to the diameter of the seedling's stem.

[0073] As shown in Figure 36(c), the angle at which the upper member 41a of the suppressor wheel stay is attached to the suppressor wheel frame 42 can be changed to an arc-like assembly, and the upper member 41a of the suppressor wheel stay can be rotated around a rotation axis in the fore-and-aft direction of the vehicle body, so planting in round ridges can be done without any problems.

[0074] (3) Next, the configuration and operation of the transplanter according to the embodiment of the present invention will be described in more detail, mainly with reference to Figures 37 to 40.

[0075] 37 to 40 are perspective views (parts 1 to 4) of a transplanter according to a sixth modified embodiment of the present invention.

[0076] The shape of the suppressing wheel frame 42 is approximately U-shaped. A pair of left and right suppressing wheel stays 41 are attached to both ends of the approximately U-shaped portion of the suppressing wheel frame 42. A portion of the bottom of the approximately U-shaped portion of the suppressing wheel frame 42 is attached to the vehicle body so as to be rotatable around a rotation axis in the left-right direction of the vehicle body. A suppressing wheel lever 43 is attached to the vehicle body and abuts from below against one of the two legs of the approximately U-shaped portion of the suppressing wheel frame 42, thereby lifting the pair of left and right suppressing wheels 40 upward and storing them. The pair of left and right suppressing wheels 40 are connected to each other.

[0077] As shown in Figure 37, in the chrysanthemum seedling transplanter, the left and right compaction wheels 40, which are arranged side by side on the left and right sides of the vehicle body, are so-called pre-compaction rollers that prepare the soil in the field prior to planting the seedlings, like the leveling rotors of a rice transplanter, and are connected together in the center of the vehicle body to improve the evenness of the soil compaction.

[0078] As shown in Figure 38, the left and right crushing wheels 40 are lifted to the storage position by a crushing wheel lever 43, which is a common crushing wheel lifting lever located on the right side of the vehicle body, on the side of the floor, not the passenger side.

[0079] As shown in Figure 39, the wheel suppression lever 43 is located forward compared to the center of the vehicle body, making it easy to operate the wheel suppression lever 43 from the front of the vehicle body. Furthermore, the gripping portion of the wheel suppression lever 43 reaches a height below the operating seat for riding, making it easy to operate the wheel suppression lever 43 from the seat.

[0080] As shown in Figure 40, the suppression wheel lever 43 is rotatably attached by utilizing a suppression wheel fulcrum shaft 401 that rotatably holds the suppression wheel 40, and the suppression wheel 40 is pushed up by the suppression wheel abutment member 402 fixed to the suppression wheel lever 43 abutting against the suppression wheel support arm 403, which is one of the legs of the approximately U-shaped suppression wheel frame 42.

[0081] The program of the invention related to the present invention is a program for causing a computer to execute all or part of the steps (or processes, operations and actions, etc.) of the work vehicle operation control method of the invention related to the present invention described above, and is a program that operates in cooperation with a computer.

[0082] In addition, the recording medium of the invention related to the present invention is a recording medium that records a program for causing a computer to execute all or some of the operations of all or some of the steps (or processes, operations and actions, etc.) of the work vehicle operation control method of the invention related to the present invention described above, and is a computer-readable recording medium in which the read program is used in cooperation with a computer.

[0083] It should be noted that the above-mentioned "some steps (or processes, operations, actions, etc.)" means one or some of the multiple steps.

[0084] Furthermore, the above-mentioned "operations of steps (or processes, operations, actions, etc.)" means the operations of all or part of the above-mentioned steps.

[0085] Furthermore, one mode of use of the inventive program related to the present invention may be in the form of being transmitted through a transmission medium such as the Internet, light, radio waves, or sound waves, being read by a computer, and operating in cooperation with the computer.

[0086] The recording medium also includes a ROM (Read Only Memory).

[0087] Furthermore, a computer is not limited to pure hardware such as a CPU (Central Processing Unit), but may also include firmware, an OS (Operating System), and even peripheral devices.

[0088] As described above, the configuration of the present invention may be realized in software or hardware. [Industrial Applicability]

[0089] The work vehicle of the present invention can improve usability and is useful for use as a work vehicle such as a rice transplanter or seedling transplanter. [Explanation of symbols]

[0090] 10 Seedling planting device 20 Seedling loading device 21 Seedling-carrying frame unit 21a Seedling carrying frame 22 Seedling stand 23 Seedling Guide Section 30 Auxiliary seedling frame 40 Suppression Wheel 41 Suppression wheel stay 41a Upper member of the suppressor wheel stay 41b Lower member of the suppression wheel stay 42 Crushing wheel frame 43 Suppression wheel lever 100 motor 101 Seedling tray inserting component 102 Pivot pin member 103 long hole 104 Locking pin member 105 Frame Plate 106 Groove 107 Stopper plate 108 Extension Spring 109 Handle parts 110 Control Unit 201 Running mechanism 202 Seedling planting mechanism 203 Engine 204 front wheel 205 rear wheel 206 Traveling transmission device 207 Hydraulic cylinder device 208 Gear Case 209 Traverse lead cam 210 Seedling tray 211 Seedling Planting Unit 212 Seedling planting hopper 213 Seedling Extraction Device 301 Mainframe 302 weight 401 Suppression wheel support shaft 402 Pressure wheel contact member 403 Crushing wheel support arm

Claims

1. A work vehicle equipped with a seedling planting device that plants seedlings in a field and a seedling loading device that loads the seedlings to be planted, The seedling-loading device has a seedling-loading frame unit attached to a vehicle body, and a plurality of seedling-loading trays movably attached to the seedling-loading frame unit, A work vehicle characterized in that the multiple seedling loading tray sections are each capable of moving back and forth in the left and right directions of the vehicle body.

2. The plurality of seedling-carrying trays are a left seedling-carrying tray and a right seedling-carrying tray arranged side by side in the left-right direction of the vehicle body, The seedling-carrying frame unit has a left seedling-carrying frame part and a right seedling-carrying frame part arranged side by side in the left-right direction of the vehicle body, The left seedling-mounting table is attached to the left seedling-mounting frame so as to be movable in the left-right direction of the vehicle body, The right seedling-mounting table is attached to the right seedling-mounting frame so as to be movable in the left-right direction of the vehicle body, 2. A work vehicle according to claim 1, wherein the left seedling-loading frame section and the right seedling-loading frame section are capable of being raised and lowered independently in the vertical direction.

3. 3. The work vehicle according to claim 2, wherein an upper edge of the seedling-carrying frame unit is formed as a seedling guide portion that guides the seedlings downward.

4. 3. The work vehicle according to claim 2, wherein an upper edge of the seedling-placing platform is formed as a seedling guide that guides the seedlings downward.

5. A work vehicle as described in claim 3, characterized in that when the seedling loading section on the left side moves to the left, the seedling loading section on the right side moves to the right, and when the seedling loading section on the left side moves to the right, the seedling loading section on the right side moves to the left.

6. A work vehicle as described in claim 5, characterized in that when the seedling loading trays are stopped for seedling replenishment, the stopping positions of the left and right seedling loading trays are both shifted toward the center of the vehicle body, or the stopping position of the left seedling loading tray is shifted toward the left side of the vehicle body to coincide with the position of the left auxiliary seedling frame, and the stopping position of the right seedling loading tray is shifted toward the right side of the vehicle body to coincide with the position of the right auxiliary seedling frame.

7. The work vehicle described in claim 6, characterized in that the seedling guide portion is rotatably formed so that the height of the upper edge of the seedling guide portion can be adjusted according to the seedling slide insertion height for seedling supply.

8. The seedlings are seedlings to be planted in ridges formed in the field, 8. A work vehicle according to claim 7, wherein the plurality of seedling-carrying trays are capable of being raised and lowered according to the height of the ridges.

9. A pair of left and right suppression wheels that suppress the surface of the ridges are attached to a suppression wheel frame via a pair of left and right suppression wheel stays, The suppressor wheel stay has a suppressor wheel stay upper member and a suppressor wheel stay lower member, the crushing wheel stay upper member is attached to the crushing wheel frame so as to be rotatable about a rotation axis in the front-rear direction of the vehicle body, the suppressed wheel stay lower member is attached to the suppressed wheel stay upper member so as to be slidable in the left-right direction of the vehicle body, 9. The work vehicle according to claim 8, wherein the crushing wheel is held by a lower member of the crushing wheel stay.

10. The shape of the crushing wheel frame is substantially U-shaped, The pair of left and right suppression wheel stays are attached to both tip ends of the approximately U-shaped portion of the suppression wheel frame, a part of the substantially U-shaped bottom of the wheel suppression frame is attached to the vehicle body so as to be rotatable about a rotation axis in the left-right direction of the vehicle body; A wheel suppression lever is attached to the vehicle body and abuts against one of the two legs of the substantially U-shaped wheel suppression frame from below, thereby lifting the pair of left and right wheels upward and storing them, The work vehicle according to claim 9, wherein the pair of left and right crushing wheels are connected to each other.

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