CN114532022A - Rice transplanter - Google Patents

Abstract

The interval between the seedling taking-out opening and the transplanting claw of the transplanter is set to be unequal intervals such as a first interval and a second interval wider than the first interval, and the seedling placing part (62) is provided with: a seedling placing surface (62b) capable of placing blanket-shaped seedlings with a narrow width corresponding to the first interval; and a pair of left and right side wall portions (62d) which are positioned on both left and right sides of the seedling placing surface (62b) and have an opposing interval suitable for guiding blanket-shaped seedlings with narrow width to move in the longitudinal transfer direction, wherein, in the pair of left and right side wall portions (62d) of the seedling placing portion (62), a linear first guide surface (f1) along the longitudinal transfer direction in the rear view is formed on one side wall portion (62d), and a second guide surface (f2) which has a shape bulging in the left and right direction so that the end side is closer to the other side wall portion (62d) than the start end side in the longitudinal transfer direction in the rear view is formed on the other side wall portion (62 d).

Description

Rice transplanter

Technical Field

The present invention relates to a rice transplanter having a seedling planting device adapted to perform a seedling planting operation at unequal row pitches where row pitches for planting seedlings are not fixed.

Background

As a rice transplanter having a seedling planting device capable of performing a seedling planting operation at an unequal row pitch, the following configuration has been known.

That is, two seedling extraction ports are formed in the width direction at intervals on each of the seedling placement units (in the prior art document, the seedling placement units) of the seedling placement table on which one blanket-shaped seedling can be placed, and two seedlings are extracted from the two seedling extraction ports by the corresponding transplanting claws and transplanted into a farmland. Further, the interval between the two seedling extraction ports formed in each seedling placement unit is different from the interval between the seedling extraction ports having an adjacent positional relationship between the adjacent seedling placement units, so that the seedling transplanting can be performed at unequal row pitches (see patent document 1).

The rice transplanter described in patent document 1 is useful in that it can transplant seedlings at unequal row pitches with blanket seedlings of standard sizes. That is, the width of the seedling placing part in the left-right direction is set to be capable of placing blanket-shaped seedlings with standard size, and two seedling taking-out ports are formed on one seedling placing part. Further, the amount of the traverse movement of the seedling support is set to the range of 1/2, which is the width of the seedling support in the left-right direction, so that seedlings in the range of 1/2, which is the width of the blanket-shaped seedlings in the left-right direction, can be taken out by one transplanting claw corresponding to one seedling take-out opening.

This is useful in that a carpet-like seedling of a standard size can be used. However, when the row-by-row insertion work is not performed for all rows as the insertion target but for a part of the rows as the insertion target, there are the following problems. That is, in the case of one seedling placing part having two seedling extraction ports, when it is desired to extract and plant seedlings from only one seedling extraction port, since the seedlings placed on the seedling placing part are blanket seedlings having a standard size, it is not possible to extract the seedlings so as to consume only 1/2 width in the left-right direction of one blanket seedling. Therefore, it is impossible to perform row-by-row implantation in odd-numbered rows, and there is still room for improvement in this point.

(Prior art document)

(patent document)

Patent document 1: japanese patent application publication No. 11-46535 "

Disclosure of Invention

(problems to be solved by the invention)

The invention provides a rice transplanter which is provided with a seedling carrying table capable of transplanting seedlings with unequal row spacing, transplanting seedlings in rows and smoothly carrying out seedling supply of a seedling carrying part.

(means for solving the problems)

The rice transplanter of the present invention is characterized in that a seedling planting device is equipped at the rear of a traveling body, the seedling planting device having: a seedling carrying table having a plurality of seedling carrying parts capable of carrying blanket-shaped seedlings; and a plurality of seedling transplanting mechanisms for taking out blanket-shaped seedlings placed on the seedling placing portions and transplanting the blanket-shaped seedlings in a farmland, the seedling transplanting mechanisms having transplanting claws for taking out a blanket-shaped seedling from the seedling taking-out openings corresponding to positions of one seedling taking-out opening formed in each of the seedling placing portions, the arrangement intervals of the seedling taking-out openings and the transplanting claws in the left-right direction being set to be unequal intervals of a first interval corresponding to a preset narrow row pitch and a second interval corresponding to a wide row pitch wider than the narrow row pitch, the seedling placing portions having: a seedling placing surface capable of placing blanket-shaped seedlings with narrow width corresponding to the first interval; and a pair of left and right side wall portions located on both left and right sides of the seedling placing surface and having an opposing interval adapted to guide blanket-shaped seedlings having a narrow width to move in a longitudinal transfer direction, wherein in the pair of left and right side wall portions of the seedling placing portion, a linear first guide surface along the longitudinal transfer direction is formed on one side wall portion when viewed from behind, and a second guide surface bulging in a shape to the left and right when viewed from behind is formed on the other side wall portion so as to be closer to the other side wall portion than a leading end side in the longitudinal transfer direction is formed on the other side wall portion.

According to the present invention, a seedling take-out port is formed at each of the seedling placing parts for performing seedling transplanting at unequal row pitches, and seedlings are taken out by one transplanting claw, so that it is also possible to stop taking out seedlings from one seedling take-out port, thereby performing seedling transplanting work in a row transplanting manner.

Further, since the width of the seedling placing section in the left-right direction and the width of the carpet-like seedling placed in the left-right direction are both relatively narrow, the effect of compression of the seedling due to the reciprocating movement of the seedling placing table in the left-right direction is less than that in the case of using a carpet-like seedling having a standard width, and the problem of uneven seedling taking amount at one seedling taking-out opening can be reduced.

In order to minimize variation in the amount of seedlings taken out from the seedling outlet, it is desirable that, when the seedlings are divided by the planting claws, there is no gap between the left and right edges of the blanket-shaped seedlings and the side wall portions opposed to the left and right edges.

Therefore, it is conceivable to set the lateral width of the seedling placing part as close as possible to the lateral width of the blanket-shaped seedlings, and to set the lateral width of the seedling placing part wider at the upper inlet side of the seedling placing part, so that the blanket-shaped seedlings can be easily inserted and replenished, and to narrow the lateral width of the seedling placing part from both sides in the vicinity of the portion where the seedling take-out port for dividing the seedlings by the transplanting claws exists.

However, the blanket seedlings with a narrow width corresponding to the narrow-width seedling placement parts for seedling transplantation at unequal row pitches are lighter in overall weight than the blanket seedlings with a standard width. Therefore, in the portion where the width of the seedling placing section in the right-left direction is narrowed from both sides, the movement resistance to the slipping of the blanket-shaped seedling is suddenly increased, and it may be difficult to smoothly move the blanket-shaped seedling in the slipping direction.

In the present invention, a first guide surface is formed on one side wall portion of the pair of right and left side wall portions of the seedling placing portion, the first guide surface being linear along the longitudinal transfer direction when viewed from the rear, and a second guide surface is formed on the other side wall portion, the second guide surface having a shape bulging in the right and left direction so that the end side of the second guide surface is closer to the other side wall portion than the start end side of the longitudinal transfer direction when viewed from the rear.

With the above configuration, the width in the left-right direction of the upper inlet side of the seedling placing part can be widely secured at the portion where the second guide surface having a shape bulging in the left-right direction is not formed, and the blanket-shaped seedling can be easily inserted when replenishing the blanket-shaped seedling. In addition, at the position where the second guide surface is formed, which is located at the position where the seedling is divided by the transplanting claws and has a shape bulging in the left-right direction, the left-right direction width of the seedling placing part is reduced so that a large gap is not generated between the left and right end edges of the blanket-shaped seedling, thereby avoiding large unevenness in the seedling taking amount.

In this case, the portion where the second guide surface is formed in a shape bulging in the right-left direction is one of the pair of right and left side wall portions of the seedling placing portion, and the first guide surface is formed linearly along the longitudinal transfer direction on the other side wall portion facing the right and left side wall portions. Therefore, as compared with the case where the second guide surfaces having the bulging shapes are formed on the side wall portions on both sides, the resistance to the slipping of the blanket-shaped seedlings can be prevented from increasing sharply, and even in the case of the relatively light blanket-shaped seedlings having a non-uniform row pitch, the resistance to the movement in the slipping direction can be reduced, and the blanket-shaped seedlings can be smoothly fed below the seedling outlet.

In the present invention, it is preferable that, in the pair of right and left side wall portions, the side wall portions forming the second guide surfaces are located at positions separating the seedling placing portions located adjacent to each other in the right and left direction, and a bulging direction of the second guide surface of one of the seedling placing portions in the right and left direction is opposite to a bulging direction of the second guide surface of the other of the seedling placing portions.

According to this structure, the side wall portion forming the second guide surface is located at a position separating the seedling placing parts at adjacent positions, and the bulging direction of one second guide surface is opposite to the bulging direction of the other second guide surface.

Therefore, the transverse moving direction of the blanket-shaped seedlings is not deviated to one transverse direction of the seedling carrying platform but is dispersed to two directions by the action of the second guide surface. Thereby, the seedling carrying platform can be easily prevented from losing the left-right balance although the function is limited.

In the present invention, it is preferable that a vertical transfer belt is provided for vertically transferring the blanket-shaped seedlings placed on the seedling placing surface of the seedling placing portion to the seedling outlet side, and a range of the second guide surface having a shape bulging in the left-right direction is a range below an upper end of a portion where the vertical transfer belt is disposed.

According to this configuration, the range of the second guide surface that has a shape bulging in the left-right direction is a range below the upper end of the portion where the vertical transfer belt is disposed. Therefore, even if the movement resistance to the slipping of the blanket-shaped seedling starts to increase due to the presence of the second guide surface, the longitudinal transfer belt starts to perform the longitudinal transfer function at that position, and therefore the blanket-shaped seedling can be smoothly fed to the side where the seedling take-out opening exists.

In the present invention, preferably, a single seedling support is provided in a position corresponding to the longitudinal transfer belt of the seedling placement section along the longitudinal seedling transfer direction so as to suppress the deflection deformation of the blanket-shaped seedling to a side away from the seedling placement surface.

In the seedling placing section, the lower portion of the carpet-like seedling may start to be deformed in a bending manner in a direction away from the seedling placing surface due to the weight of the upper portion. However, when a plurality of seedling racks are provided to form a blanket-shaped seedling having a narrow width for unequal row pitches, sliding contact with the seedling racks may cause a large influence as resistance to movement of the blanket-shaped seedling, thereby possibly preventing smooth feeding of the blanket-shaped seedling to the side where the seedling take-out opening exists.

According to this structure, a seedling support for suppressing the above-mentioned flexural deformation is provided at a portion corresponding to the longitudinal transfer belt. Thus, the longitudinal transfer function of the longitudinal transfer belt can be reliably exerted while suppressing an increase in the transfer resistance due to contact with the seedling support provided for forming blanket-shaped seedlings with a narrow width for unequal row pitches, and the seedlings can be smoothly transferred in the longitudinal direction to the seedling take-out opening side.

In the present invention, it is preferable that the seedling support is formed by combining a plurality of forming surface plate materials which can be divided and connected at a plurality of positions in the left-right direction, and a connecting portion between the forming surface plate materials is provided at a side wall portion of the seedling support portion, and the connecting portion includes: an engaging part engaged with the forming surface plate material along the direction crossing the seedling carrying surface in a mode of limiting the forming surface plate material to move along the left and right direction; and a bolt coupling part for coupling the overlapped parts of the forming surface plates in a direction crossing the seedling placing surface.

According to this configuration, the connecting portions of the plurality of molded surface plates constituting the seedling stage are provided in the side wall portions of the seedling support, and the connecting portions have: an engaging portion for restricting the movement of the molding face plates in the left-right direction; and a bolt connecting portion for connecting the overlapped portions of the molded surface plate materials.

Thus, the seedling stage can be divided into a plurality of stages by the side wall portions, and therefore, the seedling stage can be used for models with different transplanting rows.

Further, at the connecting portion of the side wall portion, there are: an engaging part for limiting the movement of the forming surface plates in the left and right directions; and a bolt connecting part for connecting the overlapped parts of the molding surface plate materials, thereby performing the connecting operation under the state of properly setting the arrangement interval of the seedling placing parts.

In the present invention, it is preferable that the seedling stage includes, in a state of being arranged in the lateral direction: a plurality of seedling placing parts, the width of which in the left-right direction along the left-right moving direction of the seedling placing table is set to a fixed value; and a vacant disk section that is located adjacent to the seedling placing section and on which blanket-shaped seedlings are not placed, the first interval being equal to an interval between the seedling take-out ports formed on the seedling placing sections adjacent to each other so as not to sandwich the vacant disk section, and the second interval being equal to an interval between the seedling take-out ports formed on the seedling placing sections adjacent to each other so as to sandwich the vacant disk section.

According to the present invention, the seedling placing parts of the seedling placing table are not all constituted by the same seedling placing part, but are constituted by a plurality of seedling placing parts whose width in the left-right direction is set to a fixed value and empty tray parts which are positioned adjacent to the seedling placing parts and on which blanket-shaped seedlings are not placed, and the row spacing can be set to be different in width depending on whether or not the empty tray parts are sandwiched.

Therefore, each of the seedling placing parts of the seedling placing table can be configured by only having one type of seedling placing part corresponding to the first interval corresponding to the narrow row spacing of the unequal row spacings. In addition, the wide row spacing of the unequal row spacings is a state in which the empty tray sections are sandwiched between the seedling placement sections, whereby the seedling placement sections can be arranged in a state corresponding to the second spacing.

Drawings

FIG. 1 is an overall side view of a riding type rice transplanter.

Fig. 2 is a left side view of the seedling transplanting device.

Fig. 3 is a vertical sectional view showing the fertilizer application device along the front-rear direction.

Fig. 4 is a top view of the seedling planting device.

Fig. 5 is a rear view of the seedling planting device.

FIG. 6 is a front view showing the upper part of the seedling stage.

Fig. 7 is a perspective view showing the structure of the insertion portion of the sliding door for a fertilizer applicator provided above the seedling table.

Fig. 8 is a rear view showing the connection part of the seedling placing part.

Fig. 9 is a sectional view taken along line IX-IX of fig. 8.

Fig. 10 is a cross-sectional view taken along line X-X of fig. 8.

Fig. 11 is a perspective view showing the seedling raising box.

Fig. 12 is a sectional view showing a state of use of the seedling raising box in a stacked state.

Fig. 13 is a rear view of the seedling planting device of the comparative example.

Fig. 14 is a sectional view showing a connection structure of the seedling placing part of the comparative example.

Description of the reference numerals

1: traveling machine body

5: seedling transplanting device

5B: seedling transplanting mechanism

54: inserting claw

60: seedling carrying table

62: seedling carrying part

62 a: seedling taking-out opening

62 b: seedling carrying surface

62c, the ratio of: longitudinal transfer belt

62 d: side wall part

63: empty dish part

66. 66: shaped facing sheet

66 a: vertical sheet

67: connection mechanism

67A: fitting part

67B: bolt joint

69: seedling support

f 1: first guide surface

f 2: second guide surface

W1: first interval

W2: second interval

Detailed Description

An example of an embodiment of the present invention will be described below with reference to the drawings.

The front-back direction and the left-right direction described in the present embodiment are as follows unless otherwise specified. That is, in the riding rice transplanter according to the present invention, the traveling direction on the forward side (see arrow F in fig. 1 and 4) of the travel machine body during operation travel is "forward", the traveling direction on the backward side (see arrow B in fig. 1 and 4) is "backward", the direction corresponding to the right side (see arrow R in fig. 4) with respect to the forward posture along the forward-backward direction is "right", and the direction corresponding to the left side (see arrow L in fig. 4) is "left".

(riding type transplanter Integrated Structure)

FIG. 1 is a side view showing the whole of a riding type rice transplanter as a rice transplanter of the present invention. Fig. 2 is a side view showing a seedling planting device 5 for 8-row planting installed at the rear of a riding type rice transplanter.

As shown in fig. 1 and 2, the riding rice transplanter is provided with a pair of left and right steerable front wheels 1F and 1F at the front part and rear wheels 1R and 1R as a pair of left and right drive wheels at the rear part of the travel machine body 1 below the machine body frame 10 of the travel machine body 1, and can travel automatically.

Power from an engine 20 of a power unit 2 provided at the front of the body is transmitted to the rear wheels 1R, 1R. The power of the engine 20 is also transmitted to a fertilizer application device 4 and a seedling planting device 5 as a ground working device, the fertilizer application device 4 is mounted on the rear portion of the traveling machine body 1, and the seedling planting device 5 is connected to the rear portion of the machine body frame 10 of the traveling machine body 1 via a lifting link mechanism 11 capable of swinging up and down.

The traveling machine body 1 has an operation unit 3 on the rear side of the power unit 2 having the engine 20 built in the hood 21. In the steering unit 3, a steering unit 31 having a steering handle 31a and the like on the front is disposed on the steering unit floor 30. A driver seat 32 is disposed behind the steering unit 31, and a driver can steer the steering unit 3. A step floor 33 for ascending and descending from the ground is provided below both lateral ends of the cab floor 30.

Side pedals 22 connected to the front of the cab floor 30 are provided on both left and right sides of the hood 21 of the power unit 2. The side step 22 can be used to get on from the front side of the body.

As shown in fig. 1, the preliminary seedling stage 12 is provided laterally outside the right and left side steps 22 at the front of the travel machine body 1.

Although not shown, the operator's section floor 30 has different front and rear portions, with the width of the operator's section floor 30 in the lateral direction being different from that of the operator's seat 32. That is, the width in the left-right direction of the cab floor 30 closer to the rearward position of the cab seat 32 is wider than the width in the left-right direction of the cab floor 30 farther from the forward position of the cab seat 32.

(fertilizing equipment)

The riding type rice transplanter is provided with a fertilizer application device 4 as an example of an agricultural material supply device.

As shown in fig. 1 and 3, the fertilizer application device 4 includes: a hopper 40 that stores powdered fertilizer as one example of agricultural materials; a feeding unit 41 for feeding the stored fertilizer from the hopper 40 by a predetermined amount; a conveying pipe 42 for conveying the fertilizer; the furrow opener 43 as a ground supply unit guides the fertilizer to the farm field through the conveying pipe 42.

The hopper 40 is provided at the rear end of the travel machine body 1 in a state where 4 container units having a storage space for the powder fertilizer are aligned in a row in the left-right direction and located on the back side of the driver seat 32. A delivery unit 41 is provided below each container unit. The fertilizer fed from the feeding unit 41 is fed to a furrow opener 43 provided in the seedling planting device 5 via a conveying pipe 42, and is supplied to a furrow formed in a farm field.

The delivery unit 41 is connected to: a carrying pipe 42 for carrying the fertilizer to the side of the furrow opener 43; and a wind-driving device 35 for conveying the fertilizer to the furrow opener 43 side by wind power.

As shown in fig. 1 and 3, the wind generating device 35 includes: an electric blower 36 for wind; a carrying duct 37a located in a supply path for carrying fertilizer to the seedling planting device 5 side; a discharge duct 37b as a discharge path for taking out surplus fertilizer to the outside; and an intake duct 37c for taking in the outside air heated and dried in the power unit 2 into the electric blower 36.

The feeding unit 41 has a feeding mechanism constituted by a feeding roller 45 and the like in the outer box 44, feeds the fertilizer supplied from each container unit downward by a predetermined amount, and feeds the fertilizer to the conveying pipe 42 side via the high-pressure conveying wind supplied from the conveying duct 37 a.

The number of the delivery parts 41 is 4 so as to correspond to the container unit. Two conveying pipes 42, 42 are connected to each delivery part 41, and fertilizer is delivered from 8 conveying pipes 42 connected to 4 delivery parts 41 to furrow openers 43 provided at 8 locations of the seedling planting device 5.

As shown in fig. 3, the delivery portion 41 is configured such that a sliding door 46 (corresponding to a fertilizer application stopper) can be inserted and removed from the outside of the outer case 44 so as to block and unblock the inflow of fertilizer from each container unit of the hopper 40 to the corresponding delivery portion 41.

By inserting the sliding door 46 into the exterior case 44 as shown by the solid line in fig. 3, the fertilizer stored in the hopper 40 can be prevented (blocked) from flowing toward the feeding portion 41. Further, by pulling out the fertilizer from the outer casing 44 as shown by the broken line in fig. 3, the fertilizer stored in the hopper 40 can be allowed (unblocked) to flow toward the feeding portion 41.

As shown in fig. 5 to 7, the sliding door 46, which can be pulled out of the outer box 44, is supported on the upper portion of a seedling stage 60 of the seedling placing mechanism 5C described below. The specific structure for supporting the sliding door 46 on the upper portion of the seedling stage 60 will be described.

(seedling transplanting device)

As shown in fig. 1 and 2, a seedling planting device 5 as an example of a ground working device is coupled to a rear end portion of the lifting link mechanism 11.

As shown in fig. 1 and 2 and fig. 4 and 5, the seedling planting device 5 has: an insertion frame 5A supported at the rear end of the lifting link mechanism 11; a seedling transplanting mechanism 5B arranged at the rear part of the transplanting frame 5A; a seedling carrying mechanism 5C for carrying blanket-shaped seedlings at the upper position of the transplanting frame 5A and moving transversely back and forth in the left-right direction; and a soil preparation device 5D located at a lower portion of the insertion frame 5A.

The insertion frame 5A is connected to the elevation link mechanism 11 via a rear link 13 provided at a rear end portion of the elevation link mechanism 11, and is supported so as to be able to yaw around a swing axis X1 in the front-rear direction.

As shown in fig. 2 and 4, the insertion frame 5A includes: a supply tank 50 connected to the rear link 13; tool bars 51 fixed to the supply box 50 and extending to the left and right; 5 implant gear boxes 52, which are long in the front-rear direction, extend rearward from the rear surface side of the tool bar 51.

The power from the engine 20 on the traveling machine body 1 side is transmitted to the supply tank 50 via the interposed drive shaft 14.

The power transmitted to the supply tank 50 is input to a transmission mechanism (not shown) provided inside the implant transmission case 52 via transmission shafts 50a extending laterally from both sides of the supply tank 50.

At the rear of the transplanting transmission case 52, a rotary case 53 (corresponding to a rotary case) as the seedling transplanting mechanism 5B is supported at a lateral position of the transplanting transmission case 52 so as to be rotatable about a lateral axis oriented in the left-right direction. A claw support box 55 having a planting claw 54 as the seedling planting mechanism 5B is supported at both end portions of the respective rotating boxes 53, 53 so as to be relatively rotatable.

As shown in fig. 4 and 5, the rotary boxes 53 as the seedling transplanting mechanism 5B are arranged on both sides of the middle 3 transplanting transmission boxes 52 out of the 5 transplanting transmission boxes 52 arranged in a lateral arrangement, with the rotary boxes 53 being arranged on both sides of the transplanting transmission boxes 52. The rotary case 53 is supported so as to be rotatable about the lateral axis at a position facing the lateral side facing the center side of the implant gear case 52, with respect to the 2 implant gear cases 52 on both outer sides.

In the seedling transplanting mechanism 5B, the rotating case 53 is disposed at a position closer to the transplanting transmission case 52, and the claw support case 55 is supported by the transplanting transmission case 52 together with the rotating case 53 in a state of being located at a position farther from the transplanting transmission case 52 than the rotating case 53, in terms of the configuration of being disposed in the transplanting transmission case 52.

The distance in the left-right direction between the transplanting claws 54 provided in the claw support case 55 is a second distance W2 corresponding to a wider row pitch of the row pitches of the transplanted seedlings, the distance in the left-right direction between the transplanting claws 54 positioned at positions sandwiching the transplanting transmission case 52 is a first distance W1 corresponding to a narrower row pitch of the row pitches of the transplanted seedlings, and the distance between the transplanting claws 54 not positioned across the transplanting transmission case 52 is a second distance W2 corresponding to a wider row pitch of the row pitches of the transplanted seedlings.

Auxiliary frames 56 are provided at both ends of the tool bar 51. The auxiliary frame 56 is attached so as to be capable of changing its posture between an auxiliary posture along the horizontal direction shown in fig. 4 and 5 and an upright posture with a free end side thereof facing downward, which is not shown, about the horizontal axis.

In the auxiliary posture shown in the drawing, when the seedling planting device 5 is operated, the seedling support 60 that moves laterally back and forth of the seedling support mechanism 5C, the sliding plate 61 that guides the lateral movement of the seedling support 60, and the like can be easily prevented from coming into contact with other objects. In the standing posture, the seedling planting mechanism 5B and the seedling placing mechanism 5C including the seedling carrying table 60, the sliding plate 61 and the like of the seedling planting device 5 in the non-operation state can be supported in a state of tilting from the ground.

As shown in fig. 4, the length L1 in the lateral direction of the tool lever 51 and the length L2 in the lateral direction including the tool lever 51 and the auxiliary frame 56 are set to be longer than the length L3 in the lateral direction of the slide plate 61 positioned below the seedling stage 60.

A floating plate unit 70 as a soil preparation device 5D is provided below the tool bar 51 and the transplanting transmission case 52.

The floating plate unit 70 is composed of a combination of 5 land preparation floating plates, one central floating plate 71 located at the center in the left-right direction, a left-right pair of side floating plates 72 located on the left and right sides, and a left-right pair of end floating plates 73 located more laterally outward than the side floating plates 72, and is used for 8-row transplanting.

The respective floating plates 71, 72, 73 constituting the floating plate unit 70 support the front end side so as to be vertically swingable, and support the vicinity of the rear end portion so as to be height-adjustable by means of support links 74.

These floating plates 71, 72, 73 contact the field surface in the lowered operation state of the seedling planting device 5, support the seedling planting device 5 so that the seedling planting depth of each seedling planting mechanism 5B is a predetermined depth, and perform soil preparation near the portion where the seedling planting is performed by the seedling planting mechanism 5B.

The furrow opener 43 is attached to each of the floating plates 71, 72, 73, and the furrow opener 43 opens a furrow for guiding and burying the fertilizer supplied from the fertilizer application device 4 to the mud surface.

As shown in fig. 4, the center float plate 71 is located substantially at the center between the right and left front wheels 1F, 1F and the right and left rear wheels 1R, 1R.

The track width L4 of the left and right rear wheels 1R, 1R is narrower than the track width L5 of the left and right front wheels 1F, so that the rear wheels 1R, 1R pass inside the passing track of the front wheels 1F, 1F. By narrowing the track width L4 of the rear wheels 1R, 1R as described above, the left and right side floating plates 72 are arranged so as to pass through the travel locus of the left and right rear wheels 1R.

(seedling carrying mechanism)

An embodiment of the seedling mounting mechanism 5C of the seedling planting device 5 will be explained with reference to fig. 5 to 10.

The seedling placing mechanism 5C, which places blanket-like seedlings at the upper position of the transplanting frame 5A and moves back and forth and laterally in the right and left direction, has a seedling placing table 60 capable of swinging back and forth in the right and left direction. The seedling stage 60 has, in a horizontally aligned state: 8 seedling carrying parts 62 capable of carrying 1 row of blanket seedlings; and 3 empty tray sections 63 on which the blanket-shaped seedlings are not placed.

At the lower part of the seedling stage 60, a sliding plate 61 is disposed at a position capable of receiving the lower end part of the blanket-shaped seedling. The slide plate 61 is fixed at a position above the planting frame 5A and configured to guide the seedling stage 60 to move back and forth in the lateral direction. Further, the sliding plate 61 is formed with 8 seedling take-out ports 62a corresponding to the respective seedling placing parts 62. That is, the sliding plate 61 supports the blanket-shaped seedlings together with the seedling placing part 62, and has the function of the seedling placing part 62. Therefore, in the present specification, the seedling outlet 62a formed in the seedling placing part 62 means the seedling outlet 62a formed in the sliding plate 61.

The slide plate 61 functions not only as the seedling placing section 62 but also as a guide member for the seedling stage 60 that moves in the transverse direction to and fro. Therefore, the slide plate 61 is not moved laterally integrally with the seedling placing section 62, but is fixed at an upper position of the transplanting frame 5A so as to be movable relative to the seedling placing section 62 and the empty tray section 63 of the seedling placing table 60, and is supported so as to receive the seedling placing section 62 and the empty tray section 63 from below.

The seedling placing surface 62b of each seedling placing part 62 of the seedling placing table 60 is provided with a longitudinal transfer belt 62c which rotates circularly, and a known longitudinal transfer mechanism (not shown) which transfers the placed blanket-shaped seedlings longitudinally to the seedling take-out port 62a side by a predetermined amount. In addition to the vertical transfer mechanism, although not shown, there is also a known lateral transfer mechanism for reciprocating the seedling stage 60 in the left-right direction. A seedling placing mechanism 5C including the above-described longitudinal transfer mechanism and the lateral transfer mechanism is formed on the seedling stage 60.

The width W3 in the left-right direction of the seedling placing section 62 is set to be approximately the same as the divided seedling width M2 obtained by halving the width M1 in the left-right direction of the seedling bed housing section 8A for growing blanket seedlings in the seedling raising box 8 described below.

In the embodiment of the present invention, the width W4 in the left-right direction of the vacant disk portion 63 is approximately the same as the width W3 in the left-right direction of the seedling placing portion 62, and can be appropriately set according to the set size of the wider row pitch among the row pitches of the seedlings to be planted by the seedling planting device 5.

By setting the lateral width W3 of the seedling placement section 62 and the lateral width W4 of the vacant tray section 63 as described above, the arrangement interval between the seedling extraction port 62a and the insertion claw 54 in the lateral direction is set to be unequal intervals such as a first interval W1 corresponding to a predetermined narrow row pitch and a second interval W2 corresponding to a wider row pitch which is wider than the narrow row pitch. The lateral transfer mechanism of the seedling stage 60 reciprocates the seedling stage 60 in the left-right direction within a range corresponding to the first interval W1.

The first interval W1 is set to coincide with the interval between the seedling extraction ports 62a formed in the adjacent seedling placement sections 62 without sandwiching the empty tray section 63, and the second interval W2 is set to coincide with the interval between the seedling extraction ports 62a formed in the adjacent seedling placement sections 62 with sandwiching the empty tray section 63.

As shown in fig. 4, the portion having the second gap W2 is located above the central floating plate 71 and above the left and right floating plates 72 of the floating plate unit 70, and the passing trajectory of the rear wheels 1R, 1R overlaps with the width range of the second gap W2 of the portion located above the side floating plates 72. As shown in fig. 4, the implant gear box 52 is disposed in the space having the second space W2.

In this structure, a rib 64 extending in a direction intersecting the direction in which the blanket-like seedling is inserted from above is provided upright on the rear upward surface 63a of the upper portion of the empty tray portion 63.

The operation for replenishing seedlings can be accurately performed by providing the reinforcing rib 64 on the upper portion of the empty tray portion 63. That is, when the driver or the assistant operator on the traveling machine body 1 takes out the blanket-shaped seedlings ready for the seedling stage 12 and replenishes the seedlings to the seedling stage 60 located rearward, if the blanket-shaped seedlings are inserted into the empty tray part 63 by mistake, the ribs 64 abut against the tips of the blanket-shaped seedlings to be inserted and serve as stoppers.

This makes it possible for the operator to easily find the wrong seedling replenishing location, thereby reducing the possibility of performing an erroneous operation.

As shown in fig. 2 and 6, an operating lever 65 of a row clutch (not shown) is provided at 5 positions on the upper portion of the front surface of the seedling stage 60, which is the surface opposite to the seedling placing surface 62b of the seedling placing part 62 of the seedling stage 60 and the rearward and upward surface 63a of the empty tray part 63. The split clutch operated by the operation lever 65 is used to connect and disconnect the power transmitted from the transmission mechanism in the implant transmission case 52 to the rotation case 53, and the split clutch is provided in 5 implant transmission cases 52 and can be connected and disconnected by the operation levers 65.

The respective operation levers 65 and the gang clutches are provided in a state corresponding to each of the transplanting transmission cases 52.

Taking the insertion transmission case 52 present at 3 positions near the center in fig. 4 as an example, a pair of right and left rotation cases 53 are provided in a general insertion transmission case 52. Each of the rotary cases 53 is provided with an insertion claw 54 on a surface thereof remote from the insertion transmission case 52. As described above, the distance between the implanting claws 54 provided so as to sandwich the implanting transmission case 52 and the left and right rotation cases 53 inevitably tends to increase. Therefore, the intervals between the insertion claws 54 provided in a state of sandwiching the insertion transmission case 52 and the left and right rotation cases 53 are arranged so as to correspond to the positions where insertion is performed at a wide pitch.

In addition, in the present embodiment, the implant gear boxes 52 are also provided at 2 locations at each of the left and right ends in fig. 4. The insertion gear box 52 at the end portion is provided with a rotation box 53 at a side close to the center side in the left-right direction, and the rotation box 53 is provided with an insertion claw 54 at a surface of a side far from the insertion gear box 52.

In the present embodiment, as described above, the split clutches are provided in the insertion transmission case 52 provided with the 3 positions near the center of the pair of right and left rotation cases 53 and the 5 positions of the insertion transmission case 52 provided with the 2 positions at the right and left ends of one rotation case 53 on one side in the right and left direction, respectively. An operation lever 65 corresponding to each of the partial clutches is provided so as to be able to communicate with and block each of the partial clutches.

The split clutches provided as described above are configured such that the split clutches of 2 positions at the end portion can be connected to and disconnected from the drive of one rotating case 53 of the implant transmission case 52 provided at the end portion in accordance with the operation of each operating lever 65. The split clutches of the insertion transmission cases 52 provided at 3 positions near the center are configured to simultaneously connect and disconnect the drives of the two right and left rotation cases 53 provided in the insertion transmission cases 52 in accordance with the operation of the respective operation levers 65.

The fertilizer application device 4 is provided with 4 delivery units 41, and each delivery unit 41 has a delivery drum 45. Two conveying pipes 42 are connected to each delivery part 41, and 8 conveying pipes 42 in total are connected so as to supply fertilizer to furrow openers 43 at fertilizing target positions of 8 positions.

Each delivery unit 41 has sliding door insertion portions 47 at two locations above the delivery drum 45, and the sliding doors 46 can be inserted into and removed from the sliding door insertion portions 47. Thereby, supply and stop of the fertilizer can be performed for each row by pulling the door 46.

As described above, the number of the feeding units 41 is smaller than the number of the sorting clutches, and the supply of the fertilizer can be stopped by the sliding door 46 according to the number of the seedling planting mechanisms 5B stopped to be driven by the sorting clutches.

As shown in fig. 5 to 7, a holding hole 63b capable of holding the sliding door 46 in an inserted state is formed in the upper portion of the empty pan portion 63, and the sliding door 46 prevents the fertilizer of the fertilizer application device 4 from being fed out. The holding holes 63b are formed at two locations above the empty tray 63, and hold the tip ends of the two sliding doors 46 by being inserted thereinto.

The sliding door 46 is a member that can be arbitrarily inserted into and removed from the holding hole 63b, and can also be arbitrarily inserted into and removed from the sliding door insertion portion 47 of the fertilizer applicator 4.

The necessity of inserting the tip end portion of the sliding door 46 into the sliding door insertion portion 47 of the fertilizer application device 4 to stop the supply of fertilizer means to stop the seedling planting by the seedling planting mechanism 5B at the stop target portion by cutting the gang clutch. At this time, since the sliding door 46 is present in the holding hole 63b provided in the upper portion of the empty pan 63 at a position close to the operating lever 65 for cutting the branching clutch and the sliding door insertion portion 47 of the fertilizer application device 4 to be stopped, the operation of cutting the branching clutch and the operation of stopping the fertilizer feed from the fertilizer application device 4 can be performed quickly and easily.

Operating rods 65 for operating the separating clutch are provided at 5 positions on the upper part of the front surface of the seedling stage 60. The holding hole 63b, which can hold the sliding door 46 inserted therein, is provided above the empty tray part 63 and is not provided above the seedling stage 62. This is because it is difficult to secure a space for installing the holding hole 63b in the upper portion of the seedling placing portion 62, and it is not realistic to perform the seedling transplanting work in a state where all or most of the gang clutches are stopped, and therefore, convenience can be secured in reality by providing the space in the upper portion of the empty tray portion 63.

(side wall part)

The seedling placing part 62 of the seedling placing table 60 has: a seedling placing surface 62b capable of placing a blanket-shaped seedling having a narrow width corresponding to the first interval W1; and a pair of left and right side wall portions 62d located on both left and right sides of the seedling placing surface 62b and having an opposed interval adapted to guide the movement of the blanket-shaped seedlings having a narrow width in the longitudinal transfer direction.

As shown in fig. 5 and 8 to 10, the pair of left and right side wall portions 62d is constituted by the side wall portion 62d that separates the adjacent seedling placing portions 62, 62 from each other, and the side wall portion 62d that separates the seedling placing portion 62 and the empty tray portion 63. These side wall portions 62d, 62d extend over a range from the lower end portion to the upper end portion of the seedling placing portion 62.

As shown in fig. 8 to 10, the side wall portion 62d functions as a member for connecting the forming surface plate members 66, 66 constituting the adjacent seedling placing portions 62, 62 to each other, or connecting the forming surface plate members 66, 66 constituting the seedling placing portions 62 and the empty tray portion 63 at adjacent positions to each other.

That is, the rising pieces 66a serving as the side wall portions 62d of the seedling placing parts 62, 62 are provided at the connecting portions between the adjacent forming surface plate materials 66, and the rising pieces 66b serving as the side wall portions 62d of the seedling placing parts 62 and the empty tray parts 63 located adjacent to each other are provided.

The top portions of the rising pieces 66a and 66b provided at the connecting portions between the adjacent forming surface plate materials 66 and 66 are connected and fixed to each other by a connecting mechanism 67.

As shown in fig. 9, the coupling mechanism 67 includes, at a coupling portion between the adjacent forming panel materials 66, 66: an engaging part 67A that is engaged with the seedling placing surface 62b in a direction intersecting the direction to restrict the movement of the molding surface plate materials 66, 66 in the left-right direction; and a bolt coupling portion 67B for coupling the overlapped portions of the molding surface plate members 66, 66 in a direction intersecting the seedling placing surface 62B.

The fitting portion 67A has: a recessed fitting groove 67Aa provided in the top of one of the molding face plates 66; the downward projecting piece 67Ab is provided on the top of the other molding surface plate material 66 so as to be insertable into the fitting groove 67Aa from a direction (upward in fig. 9) intersecting the seedling placement surface 62 b. The fitting portion 67A is configured to restrict the movement of the molding surface plates 66, 66 in the left-right direction.

The bolt coupling portions 67B are formed by screwing coupling bolts 67Bc from a direction (upward in fig. 10) intersecting the seedling placement surface 62B in a state of being overlapped with the overlapping portions 67Bb provided on the top of the other forming surface plate member 66, and are coupled to female sleeve portions 67Ba provided on the top of the one forming surface plate member 66.

The coupling mechanism 67 is also provided at a portion connecting the top portions of the rising pieces 66b as the seedling placing portion 62 and the side wall portion 62d of the empty tray portion 63 which are in adjacent positions to each other. Although not shown, the coupling mechanism 67 at this position has the same structure as the members for coupling the molding surface plates 66, 66 constituting the adjacent seedling placing parts 62, 62.

Thus, in the case of forming the seedling support 60, the seedling support 60 can be formed in different rows by using the forming surface plate materials 66, 66 divided into a plurality of parts instead of forming the whole with a continuous formed article, and by connecting the adjacent seedling support parts 62, 62 to each other with the forming surface plate materials 66, 66.

In the side wall portions 62d formed by the rising pieces 66a, 66b of the forming surface plate materials 66, a linear first guide surface f1 along the longitudinal transfer direction when one side wall portion 62d positioned with the seedling placing surface 62b therebetween is formed in a rear view, and a second guide surface f2 having a shape bulging in the left-right direction so as to be closer to the other side wall portion 62d than the terminal end side in the longitudinal transfer direction when the other side wall portion 62d is formed in a rear view.

That is, as shown in fig. 8, the first guide surface f1 is formed on the rising piece 66b of the side wall portion 62d, which is the adjacent position of the seedling placing portion 62 and the empty tray portion 63, of the rising pieces 66a, 66b, and has a linear shape parallel to the longitudinal transfer direction.

The second guide surface f2 is formed on the rising piece 66a of the rising pieces 66a, 66b serving as the side wall portion 62d serving as a partition wall positioned between the adjacent seedling placing portions 62, and has a shape bulging in the left-right direction so that the end side is closer to the other side wall portion 62d than the start end side in the longitudinal transfer direction in the rear view.

Therefore, in the side wall portion 62d located between the seedling placing portions 62, the bulging direction of the second guide surface f2 is formed in the reverse direction in the left-right direction. The thickness of the side wall portion 62d in the left-right direction is also thicker on the terminal side than on the starting side.

As shown in fig. 5 and 8, the second guide surface f2 has a laterally bulging portion extending from a position lower than the upper end to a lower end of the seedling placement surface 62b at a position close to the upper end of the portion where the vertical transfer belt 62c is disposed. That is, in the area where the longitudinal transfer belt 62c applies the seedling transfer action to the blanket-shaped seedlings, there is a portion of the second guide surface f2 bulging in the left-right direction.

(seedling support)

The seedling placing section 62 is provided with a longitudinal transfer belt 62c which rotates in a ring shape, and a seedling support 69 is provided on the seedling placing section 62 in a state of facing a conveying surface of the longitudinal transfer belt 62 c.

The seedling support 69 is provided at a position facing the conveyance surface of the longitudinal transfer belt 62c in the seedling longitudinal transfer direction so as to prevent the narrow blanket-shaped seedling from being deflected to a side away from the seedling placement surface 62b, and to leave a space from the seedling placement surface 62b to the same extent as the thickness of the bed of the blanket-shaped seedling.

(seedling raising box)

Fig. 11 and 12 show a seedling box 8 having a seedbed housing section 8A for housing a seedbed of blanket-shaped seedlings for use in the above-described riding type rice transplanter.

The seedbed housing section 8A includes: a bottom plate 80 for blocking the lower surface of the support bed; and a peripheral frame 81 which is rectangular in plan view and rises above the upper surface of the bottom plate 80 so as to surround the periphery of the bed. Further, a partition rib 82 that rises upward so as to divide the bed area into a plurality of sections is formed on the upper surface of the bottom plate 80.

The peripheral frame 81 is formed in a rectangular shape having a vertical frame portion 81A having a predetermined length and a horizontal frame portion 81B shorter than the vertical frame portion 81A.

The partition ribs 82 are formed at positions bisecting the bed container 8A in a direction intersecting the lateral frame portion 81B and parallel to the vertical frame portion 81A.

The upward projecting height h2 of the partitioning rib 82 is set to be the same as or the same as the projecting height h1 in the standing direction of the peripheral frame 81.

The peripheral frame 81 is formed to protrude downward from the lower surface of the bottom plate 80. Further, a lower partitioning bead 83 is formed on the lower surface side of the bottom plate 80, and the lower partitioning bead 83 protrudes downward at a position overlapping with the dividing bead 82 in a plan view. Therefore, the lower partition beads 83 are also formed in a direction intersecting the horizontal frame portion 81B and parallel to the vertical frame portion 81A.

The downward projecting amount h4 of the lower partition bead 83 is set to be approximately the same as the downward projecting amount h3 of the lower surface of the bottom plate 80 of the peripheral frame 81.

As shown in fig. 12, when the seedling raising boxes 8 having the above-described configuration are placed in a vertically stacked state, the lower ends of the lower partitioning ribs 83 of the upper stage seedling raising box 8 abut against or are extremely close to the upper ends of the partitioning ribs 82 of the lower stage seedling raising box 8. Thereby, one bed housing part 8A is almost completely separated. So that a state in which the bed portions of the blanket seedlings existing in the divided spaces are even slightly connected to each other can be avoided.

Therefore, when a plurality of blanket-shaped seedlings are grown using one seedling raising box 8, the seedbeds can be reliably prevented from being connected to each other. Further, the lower partition reinforcing rib 83 projecting downward from the bottom plate 80 for securing the separation can also effectively function as a reinforcing member of the seedling raising box 8 itself.

As shown in fig. 12, the thickness d2 of the partitioning bead 82 and the lower partitioning bead 83 in the direction of the lateral frame portion 81B is thinner than the thickness d1 of the vertical frame portion 81A in the direction of the lateral frame portion 81B.

The width M1 in the horizontal direction of the bed container 8A of the seedling box 8 is approximately 2 times the width W3 in the horizontal direction of the seedling placing part 62, and is set to be approximately the same as the width W3 in the horizontal direction of the seedling placing part 62 by halving.

That is, the seedling box 8 can grow 2 seedlings in a carpet shape having a divided seedling width M2 that is approximately the same as the horizontal width W3 of the seedling placement part 62.

Although not shown, the bottom plate 80 of the bed container 8A is naturally formed with a plurality of small holes for allowing the roots of seedlings to protrude.

(comparative example of seedling placing mechanism)

A comparative example of the seedling setting mechanism 5C of the seedling planting device 5 will be explained with reference to fig. 13 and 14.

The seedling placing mechanism 5C, which is located above the transplanting frame 5A and on which blanket-like seedlings are placed and which moves back and forth in the right and left direction and in the lateral direction, has a seedling placing table 60 which can swing back and forth in the right and left direction. The seedling stage 60 has 8 seedling-placing parts 62 capable of placing 1 row of blanket seedlings and 3 empty tray parts 63 on which no blanket seedlings are placed in a horizontal arrangement.

A sliding plate 61 is disposed below the seedling stage 60 at a position to block the lower end of the blanket-shaped seedling. The slide plate 61 is fixed at a position above the planting frame 5A, and guides the reciprocating lateral movement of the seedling stage 60. Further, the sliding plate 61 is formed with 8 seedling take-out ports 62a corresponding to the respective seedling placing parts 62. That is, the sliding plate 61 supports the seedling placing part 62 and the blanket-shaped seedlings, and has a function as the seedling placing part 62.

The slide plate 61 functions not only as a seedling placing section 62 but also as a guide member for the seedling stage 60 that moves back and forth in the lateral direction. Therefore, the slide plate 61 is fixed to an upper position of the transplanting frame 5A so as to be movable relative to the seedling placing section 62 and the vacant disk section 63 of the seedling placing table 60 without moving laterally integrally with the seedling placing section 62, and supports the seedling placing section 62 and the vacant disk section 63 from below.

The seedling placing surface 62b of each seedling placing part 62 of the seedling placing table 60 has a single longitudinal transfer belt 62c that rotates in a loop shape, and a known longitudinal transfer mechanism (not shown) that vertically transfers a blanket-shaped seedling placed by a predetermined amount to the seedling outlet 62a side. Although not shown, in addition to the vertical transfer mechanism, a known lateral transfer mechanism that reciprocally drives the seedling stage 60 in the left-right direction is provided. The seedling table 60 and these longitudinal and transverse transfer mechanisms constitute a seedling placing mechanism 5C.

The seedling stage 60 of this comparative example has the same structure as the seedling stage 60 shown in the first embodiment, except for the structure of the side wall portion 62d and the structure of the seedling support 69. Therefore, the same structure as that of the seedling stage 60 of the above embodiment will not be described in detail.

As shown in fig. 13 and 14, the seedling stage 60 is provided with side wall portions 62d that separate the adjacent seedling placing portions 62, 62 from each other. The side wall portion 62d extends across a range from the lower end portion to the upper end portion of the seedling placing portion 62.

The side wall portion 62d is formed by connecting the forming surface plate members 66, 66 forming the adjacent seedling placing portions 62, 62 to each other.

That is, the rising pieces 66a, which are the side wall portions 62d of the seedling placing portions 62, are provided at the connecting portions between the adjacent forming surface plate materials 66, 66. The top portions of the rising pieces 66a are connected to each other by a connecting mechanism 67.

The coupling mechanism 67 is sandwiched between the upper contact plate 68a and the lower contact plate 68b, and is coupled and fixed by a coupling bolt 68 c.

As described above, when the seedling support 60 is configured, the seedling support 60 having different rows can be easily configured by connecting the adjacent seedling support parts 62, 62 to each other by the molding surface plate materials 66, 66 divided into a plurality of parts, instead of configuring the entire continuous molded article.

The side wall portions 62d formed by the rising pieces 66a, 66b of the forming surface plate materials 66, 66 are formed in such a shape that the side wall portions 62d located on both sides of the position sandwiching the seedling placing surface 62b bulge in the left-right direction so that the end side is closer to the other side wall portion 62d than the start end side in the longitudinal transfer direction when viewed from the rear.

That is, in the side wall portions 62d located on both sides of the seedling placing surface 62b, the shape of the surface of the one side wall portion 62d and the other side wall portion 62d guiding the blanket seedlings are the same in the left-right direction, and do not have different guide surfaces as in the above-described embodiment.

The side wall portion 62d is formed to bulge out from a position more above the upper end of the vertical transfer belt 62c except for a large portion near the upper entrance of the seedling placing portion 62.

In this comparative example, the seedling support 69 is not particularly provided.

(other embodiments)

Next, another embodiment will be described. A plurality of the following embodiments may be combined without contradiction. The scope of the present invention is not limited to the contents of these embodiments.

(1) In the above embodiment, the left-right direction width W4 of the empty tray portion 63 is set to be the same as the left-right direction width W3 of the seedling placing portion 62, but the configuration is not necessarily limited thereto.

For example, the width W4 in the left-right direction of the vacant tray 63 may be set to be larger or smaller than the width W3 in the left-right direction of the seedling placement section 62, and the widths W3 and W4 in the left-right direction may be set appropriately so as to be suitable for the row pitch of the inserted seedlings.

The other structures may be the same as those of the above embodiment.

(2) In the above embodiment, in order to prevent the insertion of the blanket-shaped seedlings into the empty tray portion 63, the rib 64 is provided on the upward surface 63a of the empty tray portion 63 in the direction crossing the insertion direction of the blanket-shaped seedlings, but the configuration is not necessarily limited thereto.

For example, a stepped portion or the like may be formed to be higher or narrower on the inner side than the inlet side in the insertion direction, and appropriate shape change may be freely performed, and in short, attention may be paid or obstacles may be provided so that the blanket-shaped seedlings are not inserted into the empty tray portion 63.

The other structures may be the same as those of the above embodiment.

(3) In the above embodiment, the auxiliary frames 56 are connected to both ends of the tool bar 51, but the present invention is not limited to this configuration.

That is, since the length L1 in the left-right direction of the tool lever 51 is set to be longer than the length L3 in the left-right direction of the slide plate 61, if the purpose is to protect only the end of the slide plate 61 by the tool lever 51, it is not necessary to provide a dedicated auxiliary frame 56. Therefore, the auxiliary frame 56 may be omitted. In the embodiment, a structure capable of switching the posture to the standing posture with the free end side facing downward is added as the auxiliary frame 56, and the seedling planting device 5 in the non-operation state is supported in a state capable of being raised from the ground.

The other structures may be the same as those of the above embodiment.

(4) In the above embodiment, the sliding door 46 is inserted into the sliding door insertion portion 47 of the fertilizer application device 4 to stop the fertilizer from flowing down from the hopper 40 to the feeding portion 41 as a mode of stopping the fertilizer supply from the fertilizer application device 4, but the configuration is not necessarily limited thereto.

For example, instead of using the sliding door 46, a configuration may be adopted in which a clutch device capable of stopping the feed rollers 45 is provided in a fertilizer flow-down path connected to each of the conveying pipes 42, although not shown, and the supply of fertilizer is stopped.

The other structures may be the same as those of the above embodiment.

(5) In the above embodiment, the structure in which the floating plate unit 70 configured by combining 5 land preparation floating plates is provided as the land preparation device 5D is shown, but the structure is not necessarily limited to this structure. For example, as the land preparation float, a continuous land preparation float long in the left-right direction, or a plurality of land preparation floats such as 2 or more may be used. Further, a land preparation rotor or a harrow plate, which is not a land preparation float, may be used.

The other structures may be the same as those of the above embodiment.

(6) In the above embodiment, the seedling raising box 8 has been shown as a structure in which the partitioning ribs 82 are formed at positions that bisect the bed container 8A in a direction that intersects the lateral frame portions 81B and is parallel to the vertical frame portions 81A, but the present invention is not necessarily limited to this structure. For example, when the bed container 8A is divided, the bed container may be divided into two parts so that one side is enlarged and the other side is reduced, without being divided into two parts.

Further, the number of the partition plates may be three or more instead of two.

The other structures may be the same as those of the above embodiment.

(7) In the above embodiment, the empty tray part 63 is not provided with the blanket-like seedlings, but the present invention is not limited to this structure. For example, the width W4 in the left-right direction of the tray part 63 may be adjusted to allow the placement of the preliminary blanket-shaped seedlings. At this time, the rib 64 may be temporarily movable or detachable.

The other structures may be the same as those of the above embodiment.

(8) In the above embodiment, the side wall portion 62d located between the adjacent seedling placing portions 62, 62 is the side wall portion 62d in which the bulging direction of the second guide surface f2 is reversed in the left-right direction, but the present invention is not limited to this configuration. For example, the second guide surface f2 may be formed on the side wall portion 62d located adjacent to the seedling placing portion 62 and the empty tray portion 63 and bulge in a direction facing the side wall portion 62d located between the adjacent seedling placing portions 62, 62. At this time, a linear first guide surface f1 is formed on the side wall portion 62d located between the adjacent seedling placing portions 62, 62. Alternatively, the second guide surfaces f2 are formed on the side wall portion 62d located adjacent to the seedling placing portion 62 and the empty tray portion 63 and the side wall portion 62d located between the adjacent seedling placing portions 62, respectively, bulge in the same direction in the left-right direction, and face the linear first guide surfaces f 1.

The other structures may be the same as those of the above embodiment.

(9) In the above embodiment, the bulging portion of the second guide surface f2 formed on the side wall portion 62d is provided at a position close to the upper end of the portion where the vertical transfer belt 62c is disposed and is provided in a range from a position lower than the upper end to the lower end of the seedling placing surface 62b, but the present invention is not limited to this configuration. For example, the bulging portion may be provided in a range from a portion located above the upper end of the portion where the longitudinal transfer belt 62c is disposed to the lower end of the seedling mounting surface 62b, or in a range from a portion located at the same position as the upper end of the portion where the longitudinal transfer belt 62c is disposed to the lower end of the seedling mounting surface 62 b.

The other structures may be the same as those of the above embodiment.

(availability in industry)

The present invention is not limited to 8-row rice transplanter, and can be applied to rice transplanter capable of transplanting rice seedlings with less than 8 rows and rice transplanter having more than 8 rows.

Claims (6)

1. A rice transplanter is characterized in that a rice transplanter is provided,

a seedling transplanting device is arranged at the rear part of the traveling machine body,

the seedling transplanting device has: a seedling carrying table having a plurality of seedling carrying parts capable of carrying blanket-shaped seedlings; and a plurality of seedling transplanting mechanisms for taking out the blanket-shaped seedlings loaded on the seedling loading parts and transplanting the seedlings in farmlands,

the seedling transplanting mechanism is provided with transplanting claws which take out a blanket-shaped seedling from a seedling taking-out opening corresponding to the position of one seedling taking-out opening formed on each seedling carrying part,

the arrangement interval of the seedling taking-out opening and the transplanting claw in the left-right direction is set to be unequal interval of a first interval corresponding to a preset narrow row pitch and a second interval corresponding to a wide row pitch wider than the narrow row pitch,

the seedling carrying part is provided with: a seedling placing surface capable of placing blanket-shaped seedlings with narrow width corresponding to the first interval; and a pair of left and right side wall portions located on both left and right sides of the seedling placing surface and having an opposed interval adapted to guide the blanket-shaped seedlings with a narrow width to move in a longitudinal transfer direction,

in the pair of the right and left side wall portions of the seedling placing part, a linear first guide surface along the longitudinal transfer direction when viewed from the rear is formed on one side wall portion, and a second guide surface bulging in the right and left direction so that the end side of the second guide surface is closer to the other side wall portion than the start end side of the longitudinal transfer direction when viewed from the rear is formed on the other side wall portion.

2. A rice transplanter according to claim 1,

in the pair of the right and left side wall portions, the side wall portions forming the second guide surfaces are located at positions separating the seedling placing portions at adjacent positions in the right and left direction, and the bulging direction of the second guide surface of one of the seedling placing portions in the right and left direction is opposite to the bulging direction of the second guide surface of the other of the seedling placing portions.

3. A rice transplanter according to claim 1 or 2,

a longitudinal transfer belt which longitudinally transfers the blanket-shaped seedlings loaded on the seedling loading surface of the seedling loading part to the seedling taking-out port side,

the second guide surface has a laterally bulging shape in a range below an upper end of the portion where the vertical transfer belt is disposed.

4. A rice transplanter according to claim 3,

a seedling support is provided along the longitudinal direction of the seedling at a position corresponding to the longitudinal transfer belt of the seedling placing part in such a manner as to suppress the deflection deformation of the blanket-shaped seedling to a side away from the seedling placing surface.

5. A rice transplanter according to any one of claims 1 to 4,

the seedling carrying platform is formed by combining a plurality of forming surface plate materials which can be divided and connected at a plurality of positions in the left-right direction,

the connecting parts of the forming panel materials are arranged on the side wall parts of the seedling carrying parts,

the connecting part is provided with: an engaging part engaged with the forming surface plate material along the direction crossing the seedling carrying surface in a mode of limiting the forming surface plate material to move along the left and right direction; and a bolt coupling part for coupling the overlapped parts of the forming surface plates in a direction crossing the seedling placing surface.

6. A rice transplanter according to any one of claims 1 to 5,

the seedling carrying table is provided with the following components in a transverse arrangement state: a plurality of seedling placing parts, the width of which in the left-right direction along the left-right moving direction of the seedling placing table is set to a fixed value; and a vacant disk part which is positioned adjacent to the seedling carrying part and is not used for carrying blanket-shaped seedlings,

the first interval coincides with an interval between the seedling take-out ports formed in the adjacent seedling placing parts without sandwiching the empty tray part, and the second interval coincides with an interval between the seedling take-out ports formed in the adjacent seedling placing parts with sandwiching the empty tray part.

Images