JP3737061B2 - Ride type rice transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a seedling planting apparatus in a riding type rice transplanter.
[0002]
[Prior art]
Ride type In the rice transplanter, as disclosed in, for example, Japanese Patent Laid-Open No. 5-344808, a feed frame (6 in FIGS. 1 and 3 of the publication) has a horizontal frame (in FIGS. 1 and 3 of the publication). 7) is connected, and a planting transmission case (9 in FIGS. 1 and 3 in the above publication) is connected rearward to the lateral frame to constitute the entire seedling planting device. There is what I did.
As a result, the link mechanism (4 in FIG. 1 of the above publication) is connected to the rear part of the machine body so as to be swingable up and down, and is extended rearward, so that an elevating mechanism for swinging the link mechanism up and down is provided. In addition, a feed case (seedling planting device) is supported in a freely rolling manner around the front and rear axial cores (Y in FIG. 1 of the publication) at the rear of the link mechanism.
[0003]
[0004]
[0005]
[0006]
[Problems to be solved by the invention]
Traditional To technology According to the described structure, when a feed case (seedling planting device) is supported so as to be able to roll around the front and rear axis around the rear part of the link mechanism, a transmission shaft for transmitting power from the machine body (Japanese Patent Laid-Open No. 5-344808) 8 in FIG. 1 is arranged at the position of the front and rear axis (Y in FIG. 1 of the above publication). In this case, since substantially the entire weight of the seedling planting device is applied to the position of the front and rear shaft core, a large load is applied to the transmission shaft, and there is a possibility that the durability of the transmission shaft is reduced.
In the riding type rice transplanter, the present invention (Claim 1) transmits the power from the machine body when the horizontal frame is connected to the feed case, and the seedling planting device is configured by connecting the planting transmission case to the horizontal frame. It aims at comprising so that a seedling planting apparatus can be supported appropriately freely rolling, without causing the fall of durability of a transmission shaft.
[0007]
In the riding type rice transplanter, for example, when the seedling planting device is driven down to the ground or when the seedling planting device is removed from the machine body, the seedling planting device may be provided with a stand member to be placed on the ground. is there.
The present invention (Claims 2 and 3) is a conventional type rice transplanter. To technology As described, when the seedling planting device is configured by connecting the horizontal frame to the feed case and connecting the planting transmission case to the horizontal frame, the seedling planting device can be provided with sufficient strength in the seedling planting device. It is intended to be configured as follows.
[0008]
[0009]
[0010]
[Means for Solving the Problems]
Claim 1 According to the above feature, when the link mechanism is connected to the rear part of the machine body so as to be swingable up and down and extended rearward, the front and rear shafts of the rear part of the link mechanism are provided. The feed case of the seedling planting device is supported so that it can roll freely around the core, a horizontal frame is connected to the lower part of the feed case below the front and rear shaft cores, and a planting transmission case with a planting arm at the rear is placed sideways. A transmission shaft, which is connected to the frame in a rearward direction and transmits power from the airframe, is connected to the feed case through the horizontal frame.
[0011]
Thus, according to the feature of claim 1, when the feed case is supported so as to be able to roll around the front and rear axis around the rear part of the link mechanism, the transmission shaft is not arranged at the position of the front and rear axis. There is no situation where a large load is applied.
[0012]
As described above, the structure in which the transmission shaft is not arranged at the position of the front and rear axis cores is such that the feed case is supported around the front and rear axis cores at the rear of the link mechanism so as to be able to roll freely, and the part below the front and rear axis cores in the feed case A structure in which a transmission shaft is connected to the horizontal frame and a horizontal frame is connected to a portion below the transmission shaft in the feed case is conceivable. If comprised in this way, the space | interval of a front-back axis and a horizontal frame will become a big thing by arrange | positioning a transmission shaft between a front-back axis and a horizontal frame.
As described above, when the distance between the front and rear axis and the horizontal frame becomes large, the planting transmission case moves to the left and right when the seedling planting device rolls around the front and rear axis (the front and rear axis). The state where the horizontal frame (planting transmission case) swings to the left and right using the arm between the frame and the connecting part of the horizontal frame to the feed case), the state where the seedling planting position moves to the left and right There is. As a result, the planting positions of the seedlings are not arranged in a straight line, but are arranged in a meandering manner, and it may be difficult to perform harvesting by the combine.
[0013]
According to the features of claim 1, the transmission shaft penetrates the horizontal frame and is connected to the feed case, and the transmission shaft and the horizontal frame are arranged at the same height. Compared to the structure in which the transmission shaft is disposed between the front and rear axis and the horizontal frame, the distance between the front and rear axis and the horizontal frame can be reduced.
If the space | interval of a front-back axis and a horizontal frame can be made small like the characteristic of Claim 1, when a seedling planting apparatus rolls around the front-back axis, a planting transmission case will move to right and left. The state can be suppressed to a small one, and the state where the planting position of the seedling moves to the left and right can be suppressed to a small one. As a result, it is possible to obtain a state in which the planting positions of the seedlings are arranged in a straight line, and it becomes easy to perform cutting with a combine.
[0014]
Claim 2 According to the characteristics, the right and left direction of the seedling planting device In horizontal frame When the feed case is connected to the horizontal frame, and the planting transmission case with the planting arm at the rear is connected to the horizontal frame, the bracket to which the stand member for supporting the seedling planting device is attached, A plurality of abutting portions are provided, and the plurality of abutting portions of the bracket are abutted against and connected to the outer surface portion or the inner surface portion of the end portion of the horizontal frame.
[0015]
According to a second aspect of the present invention, when the bracket includes a plurality of abutting portions, and the plurality of abutting portions of the bracket are abutted and connected to the outer surface portion or the inner surface portion of the end portion of the horizontal frame, the bracket is In addition to being connected to the end portion of the frame at a plurality of locations (plural abutting portions), the bracket (plural abutting portions) is fitted into the end portion of the horizontal frame from the outside or the inside, so that the bracket is sufficient It is connected to the end of the horizontal frame depending on the strength. Thereby, the stand member is provided in the seedling planting device (lateral frame) with sufficient strength.
[0016]
In this case, since the horizontal frame is long in the left-right direction, if the bracket (stand member) is connected to the left and right ends of the horizontal frame, the distance between the stand members at the left and right ends of the horizontal frame will be large. The seedling planting device can be stably supported by the stand member.
[0017]
According to the features of claim 3, the case of claim 2 and similar In addition to this, the following “action” is provided.
In the seedling planting device of the riding type rice transplanter, the seedling platform is configured to be capable of reciprocating laterally feeding in the left-right direction.
[0018]
According to the feature of claim 3, the support member is attached to the bracket, and the guide member that guides the upper part of the seedling pedestal so as to be movable in the left-right direction is attached to the support member. Therefore, the guide member is interposed via the support member and the bracket. The horizontal frame is supported with sufficient strength. As a result, the guide member can sufficiently exhibit the guide function, and the reciprocating lateral feed drive in the left-right direction of the seedling platform is stably performed.
In this case, since the bracket has two functions of a function for attaching the stand member and a function for attaching the support member, the member can be shared.
[0019]
[0020]
[0021]
[0022]
[0023]
[0024]
[0025]
DETAILED DESCRIPTION OF THE INVENTION
[1]
As shown in FIG. 1, a link mechanism 3 is swingably connected to a rear portion of a machine body supported by a steerable front wheel 1 and rear wheel 2 to drive the link mechanism 3 to swing up and down. A hydraulic cylinder 4 is provided, and a seedling planting device 5 is connected to the rear portion of the link mechanism 3 to constitute a four-row planting type rice transplanter.
[0026]
As shown in FIG. 1, the power of the engine 6 provided in the front part of the airframe is transmitted to the front wheel 1 and the rear through a transmission belt 7 having a tension clutch function, a hydrostatic continuously variable transmission 8 and a transmission case 9. The power of the transmission case 9 is transmitted to the seedling planting device 5 via the PTO shaft 10.
[0027]
As shown in FIGS. 1, 2, and 4, the seedling planting device 5 includes a feed case 11 coupled to a support member 19 described later, a lateral frame 12 coupled to the feed case 11, and a rear frame 12 coupled to the lateral frame 12. An extended right and left planting transmission case 13, a planting case 14 driven to rotate on the right and left sides of the planting transmission case 13, a planting arm 15 supported by the planting case 14, and four seedlings It is provided with a seedling table 16, a center float 17, right and left side floats 18 and the like that are provided with a mounting surface and are driven to reciprocate in a lateral direction with a predetermined stroke.
[0028]
[2]
Next, the support structure of the seedling planting device 5 will be described.
As shown in FIGS. 1 and 2, one upper link 3 a is supported on the upper part of the support frame 20 at the rear part of the machine body so as to be swingable up and down and extends rearward. The lower link 3b on the left is supported so as to be swingable up and down and extends rearward, and the link mechanism 3 is configured. The rear portion of the upper link 3a and the rear portions of the right and left lower links 3b are connected to the support member 19 in a swingable manner.
[0029]
As shown in FIG. 10, the support member 19 includes a wall portion 19b, a boss portion 19a at the lower portion of the wall portion 19b, a lateral wall portion 19c at the outer periphery of the wall portion 19b, and a boss portion 19d having an opening at the upper portion of the lateral wall portion 19c. A boss portion 19e having a connecting hole opened at a lower portion of the lateral wall portion 19c, a reinforcing rib 19f extending between the boss portion 19a and the lateral wall portion 19c, a reinforcing rib 19g extending between the boss portion 19a and the wall portion 19b, and a wall A reinforcing rib 19h of the portion 19b, a reinforcing rib 19i extending over the lateral wall portion 19c, and the like are provided, and the support member 19 is integrally formed by aluminum die casting.
[0030]
As shown in FIGS. 3 and 10, the rear portion of the upper link 3 a is inserted between the lateral wall portions 19 c of the support member 19 and is swingably connected to the boss portion 19 d of the support member 19 by a connecting shaft 25. . The connecting shaft 26 is inserted into the boss portion 19e of the support member 19, and the rear portions of the right and left lower links 3b are swingably connected to the connecting shaft 26 outside the lateral wall portion 19c of the support member 19. . A support shaft 23 (see FIG. 7) is fixed to the boss portion 19a of the support member 19 in the front-rear direction.
[0031]
As shown in FIGS. 1 and 3, a single-acting hydraulic cylinder 4 is supported on an upper portion of a support frame 20 so as to be swingable up and down, and a connecting member having a C-shape in plan view is connected to the hydraulic cylinder via a suspension rubber. 4 is connected to the rear part. A connecting member is swingably connected to the connecting shaft 26 between the right and left lower links 3 b and the support member 19. Accordingly, when the hydraulic cylinder 4 is contracted, the link mechanism 3 is driven to swing upward, and when the hydraulic cylinder 4 is extended, the link mechanism 3 is driven to swing downward.
[0032]
As shown in FIGS. 6, 7, and 8, in the seedling planting device 5, the feed case 11 is rotatably supported by the support shaft 23 via the bearing 24, and the seedling is formed around the front and rear axis P <b> 1 of the support shaft 23. The planting device 5 is supported so as to be able to roll freely. The feed case 11 has a two-part structure of a right portion 11R and a left portion 11L at the position of the support shaft 23 (front / rear axis P1). The right and left portions 11R and 11L of the feed case 11 are made of aluminum die-cast. It is comprised integrally by.
[0033]
As shown in FIGS. 6, 7, and 8, semicylindrical half boss portions 11 a are integrally formed on the right and left side portions 11 </ b> R and 11 </ b> L of the feed case 11, and the half boss portions 11 a of the feed case 11 are integrally formed. The bearing 24 and the support shaft 23 are supported by the half boss portion 11 a of the feed case 11 so as to be sandwiched. In this case, mechanical processing for sandwiching the bearing 24 is not performed on the inner surface of the half boss portion 11 a of the feed case 11.
[0034]
As shown in FIGS. 3, 5, and 9, the flange portion 11 b is integrally formed with the right and left portions 11 </ b> R and 11 </ b> L of the feed case 11, and the horizontal frame 12 is connected to the flange portion 11 b of the feed case 11. The member 27 and the bolt 28 (see [4] and FIGS. 20A and 20B described later) are connected. An opening 11 c is provided in the flange portion 11 b of the feed case 11.
[0035]
As shown in FIGS. 3, 5, and 9, rod-like right and left regulating members 29 are swingably connected to the rear ends of the right and left lower links 3b, and the right and left regulating members 29 serve as feed cases. 11 is inserted into the opening 11c. A receiving plate 29a is fixed to the lower ends of the right and left regulating members 29, and a hard rubber body 29d is fixed to the receiving plate 29a. On the upper side of the flange portion 11b of the feed case 11, a receiving plate 29b is slidably fitted to the right and left restricting members 29, and stopper pins 29c are fixed to the right and left restricting members 29. A hard rubber body 29d is fixed to the base.
[0036]
With the above structure, at the height of the seedling planting device 5 in a normal planting operation state (the height at which the center float 17 and the side float 18 are in contact with the rice field), as shown in FIG. The receiving plate 29a of the left restricting member 29 is separated downward from the flange portion 11b of the feed case 11, and the receiving plates 29b (rubber bodies 29d) of the right and left restricting members 29 ride on the flange portion 11b of the feed case 11. Thus, the seedling planting device 5 is in a state capable of rolling.
Accordingly, when the seedling planting device 5 rolls to the right or left, the flange portion 11b of the feed case 11 contacts the receiving plate 29a (rubber body 29d) of the right or left regulating member 29, and the seedling planting device. 5 is stopped, and the rolling range of the seedling planting device 5 is restricted to a predetermined range.
[0037]
As shown in FIG. 9, when the seedling planting device 5 is driven up to the upper limit position, the right and left regulating members 29 move upward along with the swinging of the right and left lower links 3 b, and the right and left The receiving plate 29a (rubber body 29d) of the regulating member 29 is pressed against the lower surface of the flange portion 11b of the feed case 11, and the seedling planting device 5 is stopped from rolling. When the seedling planting device 5 is driven down to the lower limit position, the right and left restricting members 29 move downward as the right and left lower links 3b swing, and the receiving plates 29b of the right and left restricting members 29 are moved downward. The (rubber body 29d) comes into contact with the stopper pin 29c and is pressed against the upper surface of the flange portion 11b of the feed case 11, and the rolling of the seedling planting device 5 is stopped.
[0038]
[3]
Next, the structure of the transmission system to the planting arm 15 in the seedling planting device 5 will be described.
As shown in FIGS. 3 and 7, the lateral frame 12 is connected to a connecting member 27 and a bolt 28 (described later) on a portion of the feed case 11 below the support shaft 23 (front / rear axis P1) and the flange portion 11b of the feed case 11. (4) and FIGS. 20 (A) and 20 (B)). The horizontal frame 12 is formed in a hollow square pipe shape by an aluminum drawing material, and the right and left ends of the horizontal frame 12 are open.
[0039]
As shown in FIG. 7, an opening 12a is provided in the horizontal frame 12 at a portion below the support shaft 23 (front / rear axis P1) in the feed case 11, and the input shaft 30 provided in the feed case 11 is connected to the horizontal frame. The PTO shaft 10 is connected to the input shaft 29 via the universal joint 31. As shown in FIGS. 6 and 7, the output shaft 32 is disposed inside the feed case 11, and the bevel gear 30 a of the input shaft 30 and the bevel gear 32 a of the output shaft 32 are engaged with each other. The right and left planting transmission cases 13 are coupled rearward to the horizontal frame 12 by coupling members 27 and bolts 28 (see [4] and FIGS. 20A and 20B described later), and planted with the output shaft 32. A transmission shaft 34 is connected across the input shaft 33 of the transmission case 13, and a cover 35 covering the transmission shaft 34 is connected across the feed case 11 and the planting transmission case 13.
[0040]
As shown in FIG. 6, the drive shaft 36 is supported on the rear portions of the right and left planting transmission cases 13, and the planting case 14 is connected to the drive shaft 36. The sprocket 37a is externally fitted to the drive shaft 36 so as to be relatively rotatable, and the occlusion member 37b is externally fitted to the drive shaft 36 so as to be slidable and integrally rotated by the spline structure, and biases the occlusal member 37b to the sprocket 37a. A spring 37c is provided to constitute each of the right and left strip clutches 37. A transmission chain 38 is wound around a sprocket 33a and a sprocket 37a fixed to the input shaft 33. Normally, the occlusal member 37b is engaged with the sprocket 37a by a spring 37c, and each strip clutch 37 is operated to the transmission side.
[0041]
With the above structure, the power of the PTO shaft 10 is transmitted to the drive shaft 36 via the input shaft 30, the output shaft 32, the transmission shaft 34, the input shaft 33, the transmission chain 38 and each strip clutch 37, and the planting case 14 Is driven to rotate. Thereby, the planting arm 15 alternately takes out seedlings from a seedling outlet 54a (see FIGS. 4 and 14 (a)), which will be described later, and plants them on the rice field. For example, in each right (left) clutch 37, when the occlusal member 37b is slid and separated from the sprocket 37a, each right (left) clutch 37 is operated to the cut-off side, and the right (left) The planting case 14 of the planting transmission case 13 in FIG.
[0042]
[4]
Next, regarding the connection structure of the feed case 11 below the support shaft 23 (front and rear axis P1), the flange portion 11b of the feed case 11, and the horizontal frame 12 of the planting transmission case 13, the planting transmission case 13 A description will be given by taking the connecting portion to the horizontal frame 12 as a representative.
As shown in FIG. 20 (a), a cylindrical metal connecting member 27 is prepared in which a female screw portion 27a is provided on the inner surface of one end portion and a flange portion 27b is provided on the other end portion. Yes. A connecting hole 12b is provided in a portion of the horizontal frame 12 where the planting transmission case 13 is connected.
[0043]
As shown in FIG. 20 (a), the connecting member 27 is inserted into the connecting hole 12b from the outside through the female screw 27a, and the bolt 28 is inserted into the connecting member 27 from the outside to perform the screwing operation. Accordingly, as shown in FIG. 20B, the female screw portion 27a of the connecting member 27 is secured by the screw portion 28b of the bolt 28 in a state where the flange portion 27b of the connecting member 27 is fixed to the head portion 28a of the bolt 28. Moves to the head portion 28a of the bolt 28, and the intermediate portion of the connecting member 27 is plastically deformed radially outward and pressed against the inner surface of the horizontal frame 12.
[0044]
Next, when the bolt 28 is removed from the connecting member 27, the horizontal frame 12 is sandwiched by the flange portion 27 b of the connecting member 27 and the intermediate portion plastically deformed, and the connecting member 27 is not detached from the horizontal frame 12. Become. After that, as shown in FIG. 19, the planting transmission case 13 is applied to the horizontal frame 12, and the same bolt 28 as described above is inserted into the washer 40 and the connecting hole 13a of the planting transmission case 13 and the linking member 27 and screwed. Operation. Accordingly, the horizontal frame 12 and the planting transmission case 13 are sandwiched between the head 28 a of the bolt 28 and the connecting member 27, and the planting transmission case 13 is coupled to the horizontal frame 12.
[0045]
[5]
Next, the reciprocating lateral feed drive structure of the seedling raising table 16 in the seedling planting device 5 will be described.
As shown in FIGS. 6, 7, and 8, one lateral feed shaft 41 is disposed so as to penetrate the right and left side portions 11 </ b> R and 11 </ b> L in the upper part of the feed case 11. The feed case 11 is disposed so as to protrude leftward from the left side portion 11 </ b> L, and the end of the lateral feed shaft 41 is rotatably supported by the bracket 42. The feed member 43 is engaged with a spiral groove 41 a provided on the outer surface of the lateral feed shaft 41, and a support member 44 such that two cylinders are connected in a T shape is externally fitted to the lateral feed shaft 41 and the feed member 43. The support member 44 is connected to the seedling table 16. A stretchable rubber cover 82 is attached across the support member 44 and the feed case 11, and the support member 44 and the bracket 42, and the lateral feed shaft 41 is covered by the cover 82.
[0046]
As shown in FIGS. 6, 7, and 8, the output shaft 32 described in [3] is disposed below the feed case 11, and the two first sprockets 45 are provided on the output shaft 32 inside the feed case 11. Is fixed. Inside the feed case 11, two second sprockets 46 are fitted on the lateral feed shaft 41 so as to be relatively rotatable, and a transmission chain 47 is wound around the first and second sprockets 45, 46. . A groove portion 41b is provided in the lateral feed shaft 41 along the axial direction (left and right direction in FIG. 8), and a key-like connecting member 48 is provided in the groove portion 41b so as to be slidable in the axial direction. A ring member 49 having a groove is fixed to the connecting member 48.
[0047]
As shown in FIGS. 7 and 12, the operation shaft 50 a is rotatably supported on the upper part of the feed case 11 (left side portion 11 </ b> L), and the operation lever 50 is fixed to the operation shaft 50 a outside the feed case 11. The operation arm 50 b is fixed to the operation shaft 50 a inside the feed case 11, and the operation arm 50 b is engaged with the ring member 49.
[0048]
As shown in FIGS. 7 and 8, the operating lever 50 is swung to slide the connecting member 48 and the ring member 49 along the lateral feed shaft 41, and the inner surface of one of the two second sprockets 46. The tip of the connecting member 48 is inserted into the key groove of the two and one of the two second sprockets 46 is connected to the transverse feed shaft 41, whereby the power of the output shaft 32 is shifted in two stages and the transverse feed shaft. 41. A detent ball 51 and a spring 52 are provided on the lateral feed shaft 41, and the connecting member 48 is held by the detent ball 51 at a position where it is inserted into the key grooves of the two second sprockets 46.
The lateral feed transmission mechanism 53 is configured as described above. In this case, the two second sprockets 46 are fixed to the lateral feed shaft 41, and the two first sprockets 45 are externally fitted to the output shaft 32 so as to be rotatable relative to each other, and the structure of the connecting member 48, the operation lever 50, and the like is output. The shaft 32 may be provided.
Thus, as the lateral feed shaft 41 is driven to rotate, the feed member 43 and the support member 44 are driven to reciprocate laterally along the lateral feed shaft 41, and the seedling table 16 is reciprocated horizontally at a predetermined stroke. Driven.
[0049]
[6]
Next, lubrication between the lateral feed shaft 41 and the feed member 43 will be described.
As shown in FIGS. 15 (a), (b), and (c), a first cylindrical surface 44a that is in contact with the outer surface of the columnar feeding member 43 is provided inside the support member 44. A groove 44b is provided along the core direction. The second cylindrical surface 44c is provided so that the center P4 of the second cylindrical surface 44c is located at a position displaced to the groove 44b side from the center P3 of the first cylindrical surface 44a, and the second cylindrical surface 44c is the first cylindrical surface 44c. It is comprised so that it may be located in the substantially same position as the cylindrical surface 44a and the groove part 44b, or a little outside.
[0050]
As shown in FIGS. 15 (a), (b), and (c), the outer surface 44d of the support member 44 is formed concentrically with the second cylindrical surface 44c, and the portion of the outer surface of the support member 44 that faces the groove 44b. The connecting portion 44e is provided so as to protrude. As shown in FIGS. 6, 11, 12, and 14 (A), a guide rail 78 is fixed to the lower part of the back surface of the seedling table 16, and a bolt 77 fixed to the connection portion 44 e is connected via a connecting member 79. Are connected to the guide rail 78. In this case, the connecting member 79 is provided with a flexible portion that allows the connecting position of the connecting member 79 to be changed in the vertical direction with respect to the bolt 77, and the planting arm 15 takes out the seedling as described in [8] described later. In order to change the amount of seedling taken out from the mouth 54a, the position of the seedling placing table 16 can be changed in the vertical direction without being affected by the bolt 77 without any trouble.
[0051]
As shown in FIGS. 15A, 15B and 15C, a lid member 75 having a fitting portion 75a and a lid portion 75b is prepared, and the cylindrical fitting portion 75a and the disk-like lid portion 75b are the same. It is configured in a core shape. By attaching the lid member 75 to the support member 44 so that the fitting portion 75a contacts the second cylindrical surface 44c, the first cylindrical surface 44a and the groove 44b are closed by the lid member 75. Accordingly, by filling the space between the lid member 75 and the feed member 43 with the grease 76 inside the support member 44, the grease 76 passes through the groove portion 44 b and the feed member 43 and the lateral feed shaft 41. Be guided to.
[0052]
[7]
Next, the vertical feed mechanism 55 for feeding the seedling placed on the seedling raising table 16 to the seedling outlet 54a will be described.
As shown in FIGS. 11, 12, and 13, the seedling setting table 16 is provided with four seedling setting surfaces 16 a and 16 b, and each of the seedling setting surfaces 16 a and 16 b is provided with a rectangular opening. Each of these is provided with a longitudinal feed mechanism 55. The vertical feed mechanism 55 includes a lower drive wheel 56 and an upper driven wheel 57, and a vertical feed belt 58 with a protrusion wound around the drive wheel 56 and the driven wheel 57.
[0053]
As shown in FIGS. 11, 12, and 13, the hollow pipe-shaped support shaft 59 having a hexagonal outer surface in the cross section and a circular inner surface in the cross section is provided on the rear surface of the seedling platform 16. It is supported at the bottom of the slab. A support shaft 59 having a hexagonal outer surface in the cross section and a circular inner surface in the cross section is rotatably supported on the lower surface of the left two seedling setting surfaces 16 b on the back surface of the seedling setting table 16.
[0054]
As shown in FIG. 13, the drive wheel 56 includes a claw-shaped occlusal portion 56 a and a boss portion 56 b having a hexagonal cross section, and is integrally formed of resin. The drive wheel 56 is supported on the right and left two support shafts 59. It is externally fitted to rotate integrally. As a result, the four drive wheels 56 of the right two-row vertical feed mechanism 55 rotate integrally with the right two-row support shaft 59, and the four drive wheels 56 of the left two-row vertical feed mechanism 55 move to the left 2. It rotates together with the support shaft 59 of the strip.
[0055]
As shown in FIG. 11, a single support shaft 61 in the form of a round pipe is installed on the back surface of the seedling base 16 over the top of all the seedling setting surfaces 16 a and 16 b, and the driven wheel 57 is supported by the support shaft 61. The outer fitting is relatively rotatable. A spring 62 that biases the support shaft 61 upward is provided, and the tension of the longitudinal feed belt 58 is maintained by the spring 62.
[0056]
As shown in FIGS. 12 and 13, the support shaft 63 having a hexagonal cross section has two right-side support shafts 63 at a portion between the right-side two seedling setting surfaces 16 a and the left-side two seedling setting surfaces 16 b. 59 and the left two support shafts 59 are inserted and supported, and the support shaft 63 is supported so as to be relatively rotatable with respect to the right two support shafts 59 and the left two support shafts 59. A one-way clutch 64 is externally fitted to the support shaft 63, and a right vertical feed clutch 65 is provided between the one-way clutch 64 and the drive wheel 56 of the vertical feed mechanism 55 adjacent to the right (two right side strips). A left longitudinal feed clutch 65 is provided between the one-way clutch 64 and the drive wheel 56 of the longitudinal feed mechanism 55 adjacent to the left (two left sides).
[0057]
As shown in FIGS. 12 and 13, a transmission member 66 whose inner surface is hexagonal in cross section is fitted on the support shaft 63 so as to be slidable and integrally rotatable, and the transmission member 66 is attached to the drive wheel 56 by a spring 67. It is energized. As shown in FIG. 11, the operation arm 68 is swingably supported around the longitudinal axis P <b> 2 of the seedling base 16, and the end of the operation arm 68 is engaged with the transmission member 66. As described above, the right and left vertical feed clutch 65 is configured.
[0058]
As shown in FIG. 11, right and left strip clutch levers 69 are provided on the rear surface of the seedling base 16, and the right and left strip clutch levers 69 and the right and left strip clutches 37 (FIG. 6). Are connected via wires 70, and the right and left strip clutch levers 69 and the operating arms 68 of the right and left longitudinal feed clutchs 65 are connected via wires 81. In this case, the wire 81 is connected to the operation arm 68 through the winding path of the vertical feed belt 58 from each line clutch lever 69 between the seedling setting surfaces 16a and 16 on the back surface of the seedling setting table 16. .
[0059]
As shown in FIGS. 11 and 12, the one-way clutch 64 is provided with an arm-shaped first receiving portion 71, and two right-hand support shafts 59 are spaced at intervals corresponding to the lateral feed stroke of the seedling table 16. At the position, an arm-shaped second receiving portion 72 is externally fitted so as to be relatively rotatable, and a connecting member 73 is connected across the first and second receiving portions 71 and 72. As a result, the first and second receiving portions 71 and 72 and the connecting member 73 swing together, and the first and second receiving portions 71 and 72 and the spring 74 that biases the connecting member 73 downward are provided. The second receiving portion 72 is attached. In this case, you may comprise so that the spring 74 may be attached to the part which approached the 2nd receiving part 72 from the intermediate position of the connection member 73 instead of the 2nd receiving part 72. FIG.
[0060]
As shown in FIGS. 6, 8, and 12, the drive arm 80 is fixed to the end of the lateral feed shaft 41 protruding from the right portion 11 </ b> R of the feed case 11, and the drive arm 80 is rotationally driven integrally with the lateral feed shaft 41. The driving arm 80 is positioned between the first and second receiving portions 71 and 72 (counterclockwise in FIG. 14A).
[0061]
With the above structure, as described in [5] above, as the lateral feed shaft 41 is rotationally driven, the seedling platform 16 is reciprocally driven by a predetermined stroke, and the seedling platform 16 is moved to the right. When reaching the (left) lateral feed stroke end, the first receiving portion 71 (second receiving portion 72) reaches the position of the driving arm 80, and the driving arm 80 causes the first receiving portion 71 (second receiving portion 72). ) Is driven to swing upward. Thereby, the operation of the first receiving portion 71 (second receiving portion 72) is transmitted via the one-way clutch 64, the support shaft 63, and the right and left vertical feed clutch 65, and the right and left two support shafts. 59 and the vertical feed mechanism 55 are rotationally driven, and the seedlings 16a and 16b on the right and left two seedlings are fed to the seedling outlet 54a.
[0062]
For example, when the right (left) strip clutch lever 69 is operated to the cutoff position, the wires 70 and 81 are pulled, and the occlusion member 37b is slid in the right (left) strip clutch 37 shown in FIG. Thus, the planting case 14 of the right (left) planting transmission case 13 is stopped by moving away from the sprocket 37a so that the right (left) each clutch 37 is operated to the cutoff side. Similarly, in the right (left) vertical feed clutch 65 shown in FIG. 13, the transmission arm 66 of the right (left) vertical feed clutch 65 is moved to the right (2 right side) (left side (2 left side) by the operation arm 68. )) In the state where the right (left) vertical feed clutch 65 is operated to the disengagement side in a state where it is slid away from the drive wheel 56 of the vertical feed mechanism 55 and the right (left two) The feed mechanism 55 stops.
[0063]
[8]
Next, a structure for changing the amount of seedling taken out by the planting arm 15 from the seedling taking-out port 54a by changing the position of the seedling placing table 16 in the vertical direction will be described.
As shown in FIGS. 2 and 14 (a), a horizontally long support rail 54 provided with a seedling outlet 54a through which the planting arm 15 passes is disposed in the left-right direction, and the guide rail 78 of the seedling platform 16 is in the left-right direction. Is slidably attached to the support rail 54. The support rail 54 is provided with a downward support rod 54 b, and the support rod 54 b is slidably inserted into the boss portion 13 b provided in the planting transmission case 13.
[0064]
As shown in FIGS. 5 and 14 (a), the operation shaft 83 is rotatably supported by the planting transmission case 13, and the arm 83a fixed to the operation shaft 83 is engaged with the support rail. A seedling removal amount changing lever 84 is fixed to the operation shaft 83, and a lever guide 85 is provided that can guide the seedling removal amount changing lever 84 and fix it at a desired position.
[0065]
With the above structure, the position of the support rail 54 and the seedling platform 16 can be changed up and down by operating the seedling amount changing lever 84 and rotating the operation shaft 83 to change the angle of the arm 83a. Thus, the support rail 54 and the seedling platform 16 can be set to desired positions by engaging and fixing the seedling removal amount changing lever 84 to the lever guide 85.
[0066]
As a result, the movement trajectory of the planting arm 15 passing through the seedling extraction port 54a is constant. Therefore, as shown in FIG. When the position of the takeout port 54a) is set to the upper side, the amount of seedling taken out by the planting arm 15 from the seedling takeout port 54a is reduced. As shown in FIG. 14 (a), when the seedling removal amount changing lever 84 is operated upward and the position of the support rail 54 (seedling outlet 54a) is set to the lower side, the planting arm 15 is moved to the seedling outlet. The amount of seedling taken out from 54a increases.
[0067]
As shown in FIGS. 5 and 14 (a), a contact member 86 is fixed to the operation shaft 83, and the connecting member 73 is biased by a spring 74 (see FIG. 12) to the upper end of the contact member 86. By the contact, the initial positions of the first and second receiving portions 71 and 72 are set. As a result, as shown in FIG. 14 (b), the seedling removal amount changing lever 84 is operated downward to set the position of the support rail 54 (seedling outlet 54a) to the upper side, so that the planting arm 15 is When the amount of seedling to be taken out from the take-out port 54a is reduced, the upper end of the contact member 86 moves to the left in the drawing, and the initial positions of the first and second receiving portions 71 and 72 are changed upward.
[0068]
As described above, since the initial positions of the first and second receiving portions 71 and 72 are changed upward, the position of the swing limit above the first and second receiving portions 71 and 72 is not changed. Thus, when the first receiving portion 71 (second receiving portion 72) is driven to swing upward by the drive arm 80 as described in [7], the first receiving portion 71 (second receiving portion 72) The driving stroke is reduced, the amount by which the support shaft 59 and the longitudinal feed mechanism 55 are rotationally driven is reduced, and the amount of seedlings on the seedling setting surfaces 16a and 16b is sent to the seedling outlet 54a.
[0069]
As shown in FIG. 14 (a), the seedling removal amount change lever 84 is operated upward to set the position of the support rail 54 (seedling outlet 54a) to the lower side. When the amount of seedlings to be taken out from 54a is increased, the upper end of the contact member 86 moves to the right in the drawing, and the initial positions of the first and second receiving portions 71 and 72 are changed downward.
[0070]
As described above, since the initial positions of the first and second receiving portions 71 and 72 are changed downward, the position of the swing limit above the first and second receiving portions 71 and 72 does not change. Thus, when the first receiving portion 71 (second receiving portion 72) is driven to swing upward by the drive arm 80 as described in [7], the first receiving portion 71 (second receiving portion 72) The drive stroke is increased, the amount by which the support shaft 59 and the longitudinal feed mechanism 55 are rotationally driven is increased, and the amount of seedlings on the seedling setting surfaces 16a and 16b is increased to the seedling extraction port 54a.
[0071]
[9]
Next, the lifting lever 88 will be described.
As shown in FIGS. 1 and 2, an elevating lever 88 is provided on the right side of the steering handle 87 that steers the front wheel 1. A control valve (not shown) for supplying and discharging hydraulic oil to and from the hydraulic cylinder 4 and a planting clutch (not shown) capable of transmitting and shutting off the power of the engine 6 to the PTO shaft 10 (seedling planting device 5). The mission case 9 is provided. The raising / lowering lever 88 is configured to be freely operated at an ascending position, a neutral position, a descending position, and a planting position, and the raising / lowering lever 88 can be operated to the right and left marker positions at the planting position.
[0072]
As shown in FIGS. 1 and 2, the right and left markers 89 of the seedling planting device 5 are provided with right and left markers 89 that form an indicator of the next planting process on the rice field during a single planting process. Is provided. The right and left markers 89 are configured so as to be freely operable in a working posture for entering the rice field to form an index and in a retracted posture separated upward from the rice field, and the seedling planting device 5 is driven to rise greatly from the rice field. Then, the right and left markers 89 are operated to the retracted posture, and the right and left markers 89 are held in the retracted posture by the lock arm 90 (see [10] and FIG. 21 described later). When the lock arm 90 is released when the seedling planting device 5 is driven down to the surface, the right or left marker 89 is operated from the retracted position to the working position.
[0073]
When the elevating lever 88 is operated to the raised position, hydraulic oil is supplied from the control valve to the hydraulic cylinder 4, and the hydraulic cylinder 4 is contracted to drive the seedling planting device 5 upward. When the elevating lever 88 is operated to the neutral position, the hydraulic oil supply / discharge operation of the control valve is stopped, the hydraulic cylinder 4 is stopped, and the seedling planting device 5 is stopped. When the elevating lever 88 is operated to the lowered position, the hydraulic oil is discharged from the hydraulic cylinder 4 via the control valve, the hydraulic cylinder 4 is extended, and the seedling planting device 5 is driven downward. In the raised position, the neutral position, and the lowered position, the planting clutch is operated to the disengagement side, and the right and left markers 89 are held in the retracted posture.
When the elevating lever 88 is operated to the planting position, the planting clutch is operated to the transmission side, and seedling planting by the seedling planting device 5 is started, and the seedling planting device 5 is maintained at the set height from the rice field. Thus, the seedling planting device 5 is automatically driven up and down by the hydraulic cylinder 4 so that the seedling planting depth is maintained at the set depth (automatic lifting control).
[0074]
[10]
Next, the right and left markers 89 and the stand member 91 will be described.
As shown in FIG. 19, the horizontal frame 12 is formed into a hollow square pipe shape with an aluminum drawing material, and the right and left ends of the horizontal frame 12 are open. As shown in FIGS. 18 (a), (b) and FIG. 19, a bracket 92 is formed by bending a rectangular plate, and the bracket 92 is provided with a front abutting portion 92a and a rear abutting portion 92b. ing. A horizontal support pipe 93, a vertical support member 94, and a support bracket 95 are fixed to the bracket 92, and a nut 96 is fixed to the front abutting portion 92a.
[0075]
As shown in FIG. 19, in the bracket 92, the front abutting portion 92 a is inserted and fitted into the end portion of the horizontal frame 12 and is abutted on the front surface of the horizontal frame 12 from the inside, and the bolt 99 is a nut. The front abutting portion 92 a is connected to the horizontal frame 12 by being screwed into 96. A connecting member 27 is attached to the rear surface of the horizontal frame 12 in advance as described in [4] above. In the bracket 92, the rear abutting portion 92 b is abutted against the rear surface of the horizontal frame 12, and the bolt 100 is screwed into the connecting member 27, so that the rear abutting portion 92 b is coupled to the lateral frame 12. Has been.
[0076]
As shown in FIG. 1, a guide member 97 is fixed to the upper end of the support member 94, and the upper portion of the seedling bed 16 is guided by the guide member 97 so as to be slidable in the left-right direction. In this case, the upper portion of the seedling table 16 is guided by the guide member 97 so that the vertical position change of the seedling table 16 is allowed, and the planting arm 15 is moved as described in [8] above. In order to change the amount of seedling taken out from the seedling outlet 54 a, the position of the seedling placing table 16 can be changed in the vertical direction without being affected by the guide member 97. As shown in FIGS. 5 and 6, a support member 98 is fixed to the left support member 94, and the bracket 42 that rotatably supports the end portion of the lateral feed shaft 41 as described in [5] above. Are coupled to the support member 98.
[0077]
As shown in FIGS. 2 and 18 (a), a bracket 101 having a U-shape in side view is fixed to the tip of the support pipe 93, and an L-shaped stand member 91 is provided around the longitudinal axis P5 of the bracket 101. It is swingably supported. A first fixing hole 101a and a second fixing hole 101b are provided in the bracket 101, and a pin 91a is freely detachable from the stand member 91 and is urged toward the protruding side by a spring (not shown). 2 and 18 is a state in which the pin 91a is inserted into the first fixing hole 101a and the stand member 91 is fixed in the retracted posture. In the retracted position, the stand member 91 is located near the outside of the support rail 54, and the support rail 54 is protected by the stand member 91.
[0078]
As shown by a two-dot chain line in FIG. 18A, the stand member 91 is operated to the use posture, and the pin 91a is inserted into the second fixing hole 101b to fix the stand member 91 to the use posture. Thereby, since the stand member 91 comes out below the center float 17 and the side float 18, the seedling planting device 5 can be placed on the ground by the stand member 91.
[0079]
As shown in FIGS. 21, 22, and 23, the base 89a of the right and left markers 89 is bent in an L shape, and is attached to a support pipe 93 so as to be swingable around the front and rear axis P6. The base member 103 is attached to the base 89 a of the right and left markers 89, and the pin 104 is attached to the base member 103. As a result, the right and left markers 89, the base member 103, and the pin 104 are integrally swung around the front and rear axis P6 over the working posture and the retracted posture described in [9] above. As described in [9] above, when the seedling planting device 5 is driven to rise greatly from the rice field, the wire 105 for operating the right and left markers 89 to the retracted posture is connected to the pin 104, and the right A spring 106 that biases the left marker 89 to the working posture is connected across the base member 103 and the bracket 92.
[0080]
As shown in FIGS. 21, 22, and 23, a lock arm 90 is swingably supported around a pin 107 fixed to a support pipe 93, and the lock arm 90 is moved clockwise in FIG. A spring 108 is attached to the movable side), and the lifting lever 88 and the lock arm 90 described in [9] above are linked by a wire 109.
[0081]
With the above structure, as described above, when the seedling planting device 5 is driven to rise greatly from the surface, the wire 105 is pulled, the right (left) marker 89 of the working posture is operated to the retracted posture, and the lock is performed. The arm 90 engages with the pin 104, and the right and left markers 89 are held in the retracted posture.
When the seedling planting device 5 is driven down to the surface, the wire 105 is returned, but the right and left markers 89 are held in the retracted posture by the lock arm 90. Next, when the elevating lever 88 is operated to the planting position and then operated to the right (left) marker position, the wire 109 corresponding to the right (left) marker 89 is pulled, and the lock arm 90 is moved around the pin 107. 21 is operated in the counterclockwise direction on the drawing sheet 21 to move away from the pin 104 (the unlocking operation of the lock arm 90), and the right (left) marker 89 is operated from the retracted position to the working position by the spring 106.
[0082]
[11]
Next, as described in the previous item [9], the configuration of automatic lifting control when the lifting lever 88 is operated to the planting position will be described.
As shown in FIGS. 5, 16, and 17, the support shaft 110 is rotatably supported across the support bracket 95 of the right and left brackets 92, and the support arm 111 fixed to the support shaft 110 extends rearward. The rear portions of the center float 17 and the side float 18 are supported around the horizontal axis P7 of the support arm 111 so as to be swingable up and down.
[0083]
As shown in FIGS. 5, 16, and 17, the planting depth changing lever 112 is fixed to the support shaft 110, and the planting depth changing lever 112 is guided by the lever guide 85 described in [8] above. It is configured to be fixed at a desired position. As a result, the planting depth changing lever 111 is operated to rotate the support shaft 110 to change the angle of the support arm 111, so that the position of the horizontal axis P <b> 7 is raised or lowered with respect to the seedling planting device 5. By changing, the planting depth (set depth) of the seedling is changed as will be described later.
[0084]
As shown in FIGS. 16 and 17, a support member 115 obtained by bending a plate material into a J shape is fixed to the front surface of the horizontal frame 12, and the linkage member 116 is swingably supported around the horizontal axis P <b> 8 of the support member 115. Has been. The linkage member 116 includes an intermediate portion 116a (supported by the support member 115) facing in the left-right direction, a first arm portion 116b extending forward from the left end portion of the intermediate portion 116a, and a right end of the intermediate portion 116a. The second arm portion 116c extending rearward from the portion is configured, and the link member 16 is configured by bending one rod-like member. In this case, the first arm portion 116b may be extended forward from the right end portion of the intermediate portion 116a, and the second arm portion 116c may be extended rearward from the left end portion of the intermediate portion 116a. It is.
[0085]
As shown in FIGS. 16 and 17, the second arm portion 116 c of the linkage member 116 is engaged with the arm 110 a fixed to the support shaft 110, and the attitude of the linkage member 116 is determined by the support shaft 110. . An operation member 113 bent into a long and narrow gate shape in front view is attached to the front portion of the center float 17, and one end of the outer 114 a of the release wire 114 is fixed to the upper portion of the operation member 113. The first arm portion 116b of the linkage member 116 is inserted into the long hole 113a provided in the operation member 113, and one end of the inner 114b of the release wire 114 is connected to the first arm portion 116b of the linkage member 116. A spring 117 is connected across the upper portion of the operation member 113 and the first arm portion 116 b of the linkage member 116. The other end of the inner 114b of the release wire 114 is connected to a control valve (not shown) (see [9] in the previous section) for supplying and discharging hydraulic oil to and from the hydraulic cylinder 4.
[0086]
With the above structure, since the attitude of the linkage member 116 is determined by the support shaft 110, the operation spring 113 and the front part of the center float 17 are biased downward by the tension spring 117, and the center float 17. Is following the ground. When the seedling planting device 5 moves up and down relative to the center float 17, the outer 114a of the release wire 114 and the operation member 113 move up and down relative to the inner 114b and the linking member 116 of the release wire 114, and the release wire 114 The inner valve 114b is pushed and pulled, and the control valve is operated.
[0087]
Thus, the seedling planting device 5 is automatically driven up and down by the hydraulic cylinder 4, and the seedling planting device 5 is maintained at a set height from the surface (one end of the inner 114b of the release wire 114 (the first member of the linkage member 116). The distance between the one arm portion 116a) and the front portion of the center float 17 is maintained at the set interval shown in FIG. 16), and the seedling planting depth is maintained at the set depth (automatic elevation control).
[0088]
As described above, the planting depth changing lever 112 is operated to rotate the support shaft 110, the angle of the support arm 111 is changed, and the position of the horizontal axis P7 is moved up and down with respect to the seedling planting device 5. By changing, the height from the rice field to the seedling planting device 5 can be changed, and the seedling planting depth (set depth) can be changed.
In this case, when the position of the horizontal axis P7 is changed upward (downward) with respect to the seedling planting device 5, the rotation of the support shaft 110 is transmitted to the second arm portion 116c of the linkage member 116 via the arm 111a. Since the linking member 116 is swung around the horizontal axis P8 in the clockwise direction in FIG. 16 (counterclockwise in FIG. 16), the release wire can be changed even if the seedling planting depth (set depth) is changed. The distance between one end of the inner 114b of 114 (the first arm portion 116a of the linkage member 116) and the front portion of the center float 17 is maintained at the set interval shown in FIG.
[0089]
【The invention's effect】
According to the first aspect of the present invention, when the seedling planting device is supported so as to be able to roll freely around the front and rear shaft cores of the rear portion of the link mechanism in the riding type rice transplanter, a large load is not applied to the transmission shaft that transmits power from the machine body. It was possible to improve the durability of the transmission shaft.
According to the features of claim 1, when the seedling planting device rolls around the longitudinal axis, the planting transmission case can be restrained from moving to the left and right, and the planting position of the seedling moves to the left and right. As a result, it is possible to reduce the state of the above to a small one, and it becomes easy to perform harvesting by the combine, and the workability can be improved.
[0090]
According to the second aspect of the present invention, in the riding type rice transplanter, when the horizontal frame is connected to the feed case, and the seedling planting device is configured by connecting the planting transmission case to the horizontal frame, the stand member is formed with sufficient strength. The planting device (lateral frame) can be provided, and the seedling planting device can be stably placed on the ground by the stand member.
[0091]
According to the feature of claim 3, as in the case of claim 2, the “effect of the invention” of the above-mentioned claim 2 is provided. In addition to this “effect of the invention”, the following “effect of the invention” is provided. It has.
According to the third aspect of the present invention, the guide member is supported by the horizontal frame through the support member and the bracket with sufficient strength, and the guide member can sufficiently exhibit the guide function, so that the seedling platform is laterally moved. The reciprocating lateral feed driving is stably performed, and the planting performance of the seedling planting apparatus can be improved.
In this case, according to the feature of claim 3, the bracket has two functions, that is, a function of attaching the stand member and a function of attaching the support member, so that the member can be shared. It became advantageous in terms of simplification.
[0092]
[0093]
[Brief description of the drawings]
[Fig. 1] Overall side view of a riding rice transplanter
[Figure 2] Overall plan view of the riding rice transplanter
[Fig. 3] Side view of seedling planting device
[Fig. 4] Plan view of seedling planting device
[Fig. 5] Plan view of seedling planting device
[Fig. 6] Transverse plan view near the feed case and planting transmission case
FIG. 7 is a vertical side view of the vicinity of the feed case and the horizontal frame.
FIG. 8 is a longitudinal front view of the vicinity of the lateral feed speed change mechanism.
FIG. 9 is a side view of the vicinity of the rear portion of the lower link, the regulating member, and the flange portion of the feed case.
FIG. 10 is a front view, a longitudinal side view, and a transverse plan view of a support member.
FIG. 11 is a front view of the vicinity of a seedling table and a vertical feed mechanism.
FIG. 12 is a cross-sectional plan view of the vicinity of the vertical feed mechanism in the seedling platform.
FIG. 13 is a cross-sectional plan view of the vicinity of the one-way clutch and the right and left vertical feed clutches in the vertical feed mechanism.
FIG. 14 is a longitudinal side view of the vicinity of the support rail and the seedling outlet.
FIG. 15 is a longitudinal front view, a longitudinal side view, and a transverse plan view of the vicinity of a transverse feed shaft, a feed member, and a support member.
FIG. 16 is a side view of the vicinity of the center float and the linking member.
FIG. 17 is a plan view of the vicinity of the center float and the linking member.
FIG. 18 is a front view and a side view of the vicinity of the bracket connected to the right and left ends of the horizontal frame.
FIG. 19 is a cross-sectional plan view of the vicinity of the bracket connected to the right and left ends of the horizontal frame.
FIG. 20 is a cross-sectional plan view showing the attachment state of the connecting member to the horizontal frame.
FIG. 21 is a front view of the vicinity of the base of the right and left markers.
FIG. 22 is a plan view near the base of the right and left markers.
FIG. 23 is a side view of the vicinity of the base of the right and left markers.
[Explanation of symbols]
3 Link mechanism
4 Lifting mechanism
5 Seedling planting equipment
11 Feed case
12 Horizontal frame
12b Connecting hole
13 Planting transmission case
15 Planting arm
16 Seedling stand
17 Float
27 Connecting member
27a Female thread
27b Flange
28 volts
30 Transmission shaft
91 Stand member
92 Bracket
92a, 92b abutting part
94 Support member
97 Guide members
110, 110a, 111 Position changing means
114 Position detection means
116 Linking member
116a middle part
116b 1st arm part
116c 2nd arm part
P1 Longitudinal shaft core
P7 rear fulcrum

Claims (3)

The link mechanism is connected to the rear part of the fuselage so that it can swing up and down, and extends backward.
A lifting mechanism for swinging the link mechanism up and down is provided,
A feed case of a seedling planting device is supported in a freely rolling manner around the front and rear shaft cores of the rear part of the link mechanism, and a horizontal frame is connected to a portion below the front and rear shaft cores in the feed case to plant the rear part A planting transmission case with an arm is connected to the lateral frame in a rearward direction,
A riding type rice transplanter in which a transmission shaft for transmitting power from the machine body is connected to the feed case through the horizontal frame. A bracket to which a stand member that supports the seedling planting device is attached is provided with a plurality of abutting portions,
The riding type rice transplanter according to claim 1 , wherein a plurality of abutting portions of the bracket are abutted and connected to an outer surface portion or an inner surface portion of an end portion of the horizontal frame.   The riding type rice transplanter according to claim 2, wherein a support member is attached to the bracket, and a guide member that guides the upper part of the seedling bed so as to be movable in the left-right direction is attached to the support member.

Images