CN110959354A - Seedling transplanter - Google Patents

Abstract

The invention provides a seedling transplanter which can greatly lighten the weight of components forming a leveling roller, reduce the number of accessories, improve the strength and improve the leveling performance compared with the prior art. A planting main frame (240a) for supporting a planting device (200) and side frames (240b) fixed on the left and right sides of the planting main frame (240a) are provided, the planting main frame (240a) is formed into a shape protruding towards the front side of a machine body than the side frames (240b), a leveling frame (100a) forming the leveling device and a leveling fixing member for holding the leveling frame (100a) are provided, the leveling fixing member comprises a first leveling fixing member (110a) for supporting the leveling frame (100a) from the planting main frame (240a) and a second leveling fixing member (110b) for supporting the leveling frame (100a) from the side frames (240b), and the second leveling fixing member (110b) is in a posture of supporting a lower position towards the front of the machine body than the first leveling fixing member (110 a).

Description

Seedling transplanter

Technical Field

The present invention relates to a seedling transplanter for performing work in a farm field.

Background

As a conventional seedling transplanter, there is known a seedling transplanter having a structure in which a plurality of seedling trays made of resin are arranged in a longitudinal and transverse direction to supply seedlings to be planted in holes, and a planting device for taking out the seedlings from the seedling trays and planting the seedlings in a field is connected to a rear part of a vehicle body (see, for example, patent document 1).

In addition, the conventional seedling transplanter has a structure in which the leveling roller is supported from the machine side, and the height adjustment is also manually performed.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2016-101129

Disclosure of Invention

However, according to the above-described conventional configuration, since the leveling roller has the same width as the planting device, the leveling roller projects from the body in a wide manner when the planting device is detached, and therefore, it is necessary to provide a mechanism for detachably attaching the left and right end portions of the leveling roller in order to prevent damage due to contact with the outside.

In addition, the frame for supporting the leveling roller from the traveling vehicle body side is complicated and heavy, and there is a problem that the straight-line advancing stability is lowered to cause disorder of the planting trajectory.

In view of the above-described problems of the conventional seedling transplanter, an object of the present invention is to provide a seedling transplanter in which the members constituting the leveling roller can be significantly reduced in weight, the number of parts can be reduced, and the strength can be improved as compared with the conventional seedling transplanter.

In order to solve the above problems, the invention described in claim 1 is a seedling transplanter comprising a planting device 200 for planting seedlings in a field and a leveling device for leveling the field where the seedlings are planted, it is characterized in that a planting main frame 240a for supporting the planting device 200 and side frames 240b fixed on the left and right sides of the planting main frame 240a are provided, the planting main frame 240a is formed to protrude to the front side of the machine body than the side frame 240b, a leveling frame 100a constituting the leveling device and a leveling fixture for holding the leveling frame 100a are provided, the leveling fixture includes a first leveling fixture 110a supporting the leveling frame 100a from the planting main frame 240a and a second leveling fixture 110b supporting the leveling frame 100a from the side frame 240b, the second flat fixing member 110b is in a lower position in front of the body than the first flat fixing member 110 a.

In addition to the invention of claim 1, the invention of claim 2 is provided with: a seedling tray conveying device 210 that conveys the seedling trays 50 from the upstream side to the downstream side of the conveying path 201; a seedling take-out device 201c for taking out the plug seedlings from the seedling trays 50 being transported by the seedling tray transport device 210; the planting device 200 for planting the hole seedlings taken out by the seedling taking-out device in a farmland; and a recovery device 300 for recovering the seedling tray 50 sent out from the terminal end of the conveying path 201, wherein the planting main frame 240a and the side frames 240b are provided on the front side of the seedling tray conveying device 210, a motor fixture 510 is mounted on the planting main frame 240a, the motor fixture 510 supports a motor 500 capable of lifting the flattening device, and the motor fixture 510 is positioned above the planting main frame 240a and the side frames 240b and behind the recovery device 300.

In addition to the aspect 2, the invention described in the aspect 3 is configured such that a lifting arm 530 and a lifting gear 520 for lifting and lowering the leveling device are provided, a gear frame 520a for supporting a rotation center 543 of the lifting gear 520 is provided on the front side of the body of the motor mount 510, the lifting arm 530 is lifted and lowered by transmitting the rotational force from the motor 500 to the lifting gear 520, the lifting gear 520 is provided on the rear side of the body with respect to the rotation center 543, and the lifting arm 530 is disposed on the front side of the body with respect to the rotation center 543.

In the present invention according to claim 4, in addition to claim 3, a leveling arm 540 that rotates integrally with the elevating arm 530 is provided, and a relief portion that allows the leveling arm 540 to move relative to the elevating gear 520 is provided.

The present invention has the following effects.

According to the present invention described in claim 1, since the leveling fixture supporting the leveling device from the planting main frame supporting the main part of the planting device and the side frames fixed to the left and right sides of the planting main frame are provided, the leveling device is supported from the planting device side, and thus the leveling property is improved.

In addition, the leveling device comprises a first leveling fixing piece supported from the planting main frame and a second leveling fixing piece supported from the side frame, and the second leveling fixing piece is in a posture of supporting towards the front lower position of the machine body than the first leveling fixing piece, so that the leveling device can be supported more firmly, and the leveling device is difficult to damage even on a rugged farmland surface.

Further, according to the invention described in claim 2, in addition to the effect of the invention described in claim 1, since the motor fixing member that supports the motor that can raise and lower the leveling device is attached to the planting main frame, the planting main frame is strong, and therefore the motor is less likely to be affected by the vibration of the machine body.

In addition, the motor fixing member is located above the planting main frame and the side frame and behind the recovery device, so that rainwater and muddy water in a farmland are difficult to adhere to the motor, and the motor can be prevented from being broken down.

Further, according to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the raising/lowering arm and the raising/lowering gear capable of raising/lowering the leveler are provided, the gear frame supporting the rotation center of the raising/lowering gear is provided on the front side of the body of the motor fixture, and the raising/lowering arm is raised/lowered by transmitting the rotational force from the motor to the raising/lowering gear, whereby the leveler can be raised/lowered by the power of the motor, and therefore, the workability is improved.

Further, the leveling roller can be lifted and lowered in a stable posture by providing the lifting gear on the rear side of the body with respect to the rotation center of the lifting gear and disposing the lifting arm on the front side of the body with respect to the rotation center of the lifting gear.

Further, since the lifting and lowering can be performed in a stable posture, it is difficult to apply a load to the motor and the support member constituting the leveling roller.

Further, according to the invention described in claim 4, in addition to the effect of the invention described in claim 3, when the leveling device is pushed up by the unevenness of the surface of the agricultural land, the pushing-up load or the overload is released through the relief portion, whereby the durability of the leveling device, the elevating gear, and the like can be ensured.

Drawings

Fig. 1 is a side view of a riding rice transplanter according to an embodiment of the present invention.

Fig. 2 is a plan view of the 8-row rice transplanter shown in fig. 1.

Fig. 3 is an enlarged side view of the rear part of the riding rice transplanter of the present embodiment shown in fig. 1.

Fig. 4(a) is a bottom view of a part of the seedling tray of the riding rice transplanter of the present embodiment, and fig. 4(b) is a side view of the part of the seedling tray as viewed from the short side.

Fig. 5 is a schematic side view showing a state of a seedling tray conveyed along a conveying path that is bent substantially in a U shape in side view in the riding rice transplanter of the present embodiment.

Fig. 6 is a schematic partially enlarged side view of the lower part of the planting device and its periphery for explaining the mounting structure of the roller fixing member of the frame holding the leveling roller of the riding rice transplanter according to the present embodiment.

Fig. 7 is a schematic partially enlarged side view of the lower part and its periphery of the planting device for explaining the mounting structure of the motor fixture of the motor for lifting the leveling roller of the riding rice transplanter of the present embodiment.

Fig. 8(a) is a partially enlarged schematic side view of the leveling roller for explaining the coupling structure of the lifting gear and the lifting arm of the rice transplanter for riding in the present embodiment, and fig. 8(b) is a partially enlarged schematic side view of the leveling roller for explaining the tension spring provided between the leveling arm and the center roller.

Fig. 9 is a plan view showing a support member for the leveling roller of the riding rice transplanter of the present embodiment.

In the figure: 1-riding rice transplanter, 2-traveling vehicle body, 50-seedling tray, 100 a-leveling frame, 110 a-first leveling fixing piece, 110 b-second leveling fixing piece, 200-planting device, 201-conveying path, 201 c-seedling taking-out device, 210-seedling tray conveying device, 240 a-planting main frame, 240 b-side frame, 300-recovery device, 500-motor, 510-motor fixing piece, 520-lifting gear, 520 a-gear frame, 521-sliding pin, 530-lifting arm, 540-leveling arm 541, connecting shaft, 542-long hole, 543-rotation center.

Detailed Description

Hereinafter, a riding rice transplanter for eight-row planting according to an embodiment of the seedling transplanter of the present invention will be described with reference to the drawings.

Fig. 1 is a side view of a riding rice transplanter of the present embodiment.

Fig. 2 is a plan view of the rice transplanting machine of the present embodiment shown in fig. 1.

Fig. 3 is an enlarged side view of the rear part of the rice transplanting machine of the present embodiment shown in fig. 1.

As shown in fig. 1, the rice transplanter 1 of the present embodiment is equipped with a planting device 200 on the rear side of a traveling vehicle body 2 so as to be able to ascend and descend via an ascending/descending link device 30, and a hopper 40 of a fertilizer applicator is provided on the upper side of the rear part of the traveling vehicle body 2.

The rice transplanter 1 is a four-wheel-drive type seedling transplanter having a traveling vehicle body 2 with a pair of left and right front wheels 3 and a pair of left and right rear wheels 4.

The engine 5 is mounted on the main frame 6, and the rotational power of the engine 5 is transmitted to a sub-transmission mechanism (not shown) in the transmission 7 via an HST (hydrostatic continuously variable transmission) or the like. The rotational power changed in speed in the transmission case 7 is separated into traveling power for a traveling system and the like and external power for the planting device 200 and the like, and is output.

Part of the traveling power is transmitted to a pair of left and right front wheel end boxes 8 to drive the front wheels 3, and the rest is transmitted to left and right rear wheel gear boxes 9L, 9R to drive the rear wheels 4. Further, a part of the rotational power transmitted to the left rear wheel gear box 9L is transmitted to the leveling roller drive shaft 101, and the leveling roller 100 is rotated (see fig. 3).

The upper part of the engine 5 is covered with a hood 13, and the driver's seat 10 is provided on the hood 13. A steering wheel 11 for steering the front wheels 3 is provided in front of the driver seat 10, and the front side thereof is covered with a front cover 12. Further, horizontal bottom steps 14 are provided on both left and right sides of the lower ends of the engine cover 13 and the front cover 12, and the operations of supplying seedling trays, fertilizers, and the like are facilitated.

Further, the replenishment seedling carriers 15 are arranged on both the left and right sides of the steering wheel 11 and the front cover 12, a plurality of seedling trays 50 are loaded in advance, and the worker takes out the seedling trays 50 loaded in advance on the replenishment seedling carriers 15 in the planting work and carries them to the starting end portion (upstream side) of the conveyance path 201 connected to the planting device 200 at the rear portion to sequentially replenish them.

The conveying path 201 has a two-row planting structure, and conveys one seedling tray 50 for each two-row planting row in sequence, and supplies the seedlings in a hole to each seedling planting portion 220 described later. Therefore, in the riding rice transplanter 1 for eight-row planting, four conveying paths 201, four seedling planting portions 220, and the like are provided in the lateral width direction in a plan view in order to realize multi-row planting (see fig. 2).

That is, the planting device 200 described above includes, for each of the two planting rows:

1. a seedling tray conveying device 210 that conveys the seedling trays 50 supplied in sequence from the upstream side to the downstream side of the conveying path 201;

2. a seedling planting section 220 provided midway in the conveyance path 201, for taking out the seedlings from the seedling tray 50 conveyed and planting the seedlings in a field; and

3. and a collecting device 300 for sequentially collecting empty seedling trays 50, which are taken out from the seedling planting section 220 and sent out from the terminal end of the conveying path.

Here, the structure of the seedling tray 50 will be described mainly with reference to fig. 4(a) and 4 (b).

Fig. 4(a) is a bottom view of a part of the seedling tray 50, and fig. 4(b) is a side view of the part of the seedling tray 50 as viewed from the short side.

That is, as shown in fig. 4(a) and 4(b), the seedling tray 50 is a flexible, rectangular plate-like member made of synthetic resin in which a plurality of seedling raising holes 51 are arranged in the longitudinal and transverse directions, and can be bent in a substantially U-shape in a side view on the conveyance path (see fig. 5). Fig. 5 is a schematic side view showing a state of the seedling tray 50 conveyed along the conveying path 201 bent in a substantially U-shape in a side view.

The seedling raising hole 51 is a hole-shaped member having a circular opening 51a on the back side in the drawing of fig. 4 a, a bottom 51b on the front side in the drawing of fig. 4 a, and a space for raising seedlings in the hole inside (see fig. 4 b). Dot holes 51b1 of a predetermined shape are formed in the bottom portion 51b so that push-out pins (not shown) provided in the seedling planting portion 220 for pushing out the seedlings in the seedling holes 51 can be inserted from the bottom portion 51b side toward the opening 51a side.

The planting operation is performed by supplying the seedling tray 50, in which the seedlings are grown in the seedling growing holes 51, to the conveyance path 201 of the planting device 200.

As shown in fig. 4 a, feeding holes 52 having a substantially square shape are formed at both left and right side edges of the width of the seedling tray 50 in the short direction at regular intervals along both left and right long sides 53L, 53R in accordance with the conveying direction (see arrow a in fig. 4 a) in the longitudinal direction of the seedling tray 50.

The feeding claw 211 (see fig. 5) of the seedling tray conveying device 210 is engaged with the feeding hole 52 and moves up and down within a predetermined time period (see arrow B of fig. 5), whereby the seedling tray 50 is conveyed intermittently in the row of the seedling raising holes 51.

Further, the seedling planting section 220 includes: push-out pins (not shown) for simultaneously inserting and taking out seedlings in the seedling holes 51 of the row 1 in the row of the seedling tray 50 from the bottom portions 51 b; and a seedling conveying belt (not shown) which conveys the right half of the seedlings in the right-hand direction in the 1 row quantity of seedlings in the transverse direction pressed by the pressing pin and conveys the left half of the seedlings in the left-hand direction, and the seedling planting claws 221 which are rotatably arranged below the left side and the right side of the seedling conveying belt rotate, so that the seedlings in the right-hand and left-hand holes conveyed by the seedling conveying belt are sequentially planted in the farmland.

Further, a floating body 230 (see fig. 2) is provided below each seedling planting part 220.

These floating bodies 230 slide while leveling the mud surface, and seedlings are planted on the leveling tracks by the planting claws 221.

The above-described recovery device 300 is disposed below the upstream-side conveyance path 201a of the seedling tray conveyance device 210 (see fig. 1 and 3), and is configured to sequentially recover empty seedling trays 50 fed from the end of the downstream-side conveyance path 210b (see fig. 5). The recovery device 300 will be described later.

Here, the structure of the downstream conveyance path 201b will be described with reference to fig. 5.

That is, as shown in fig. 5, the downstream conveyance path 201b includes: a conveying support rod 212 for supporting the seedling tray 50 conveyed by contacting the surface of the opening part 51a side, and arranged at the center position of the left and right width of the seedling tray 50 and the vicinity 3 of the left and right sides; and a conveying guide bar 213 disposed in a longitudinal direction in a center position of the lateral width of the bottom 51b side surface of the seedling tray 50 so as to be capable of being inserted into the guide bar insertion space 54 (see fig. 4(a) and 4 (b)).

The conveyance support bar 212 and the conveyance guide bar 213 are disposed with a predetermined interval maintained in a side view, and are bent obliquely upward toward the front side of the recovery device 300 in order to guide the seedling tray 50 toward the recovery device 300. Furthermore, an end portion 212b of the conveyance support rod 212 is fixed to a predetermined fixture (not shown) fixed at one end side to the lower portion of the upstream-side conveyance path 201a, and an end portion 213b of the conveyance guide rod 213 is fixed to a conveyance guide rod support fixture 214 (see fig. 5) fixed at one end side to the upstream-side conveyance path 201 a.

The running vehicle body 2 of the present embodiment corresponds to an example of the running vehicle body of the present invention. Note that the seedling tray 50 of the present embodiment corresponds to an example of the seedling tray of the present invention. The planting device 200 of the present embodiment corresponds to an example of the planting device of the present invention, and the seedling tray conveying device 210 of the present embodiment corresponds to an example of the seedling tray conveying device of the present invention. The seedling planting part 220 of the present embodiment corresponds to an example of the seedling planting part of the present invention, and the recovery device 300 of the present embodiment corresponds to an example of the recovery device of the present invention.

Next, the configuration and operation of the recovery device 300 disposed on the rear end side of the downstream conveying path 201b will be further described mainly with reference to fig. 5.

As shown in fig. 5, the recovery device 300 includes:

1. a conveying roller 320 which is rotatably disposed on the rear end side of the recovery device 300, has a plurality of conical protrusions 321 disposed on the surface of a cylindrical roller member and engaged with the opening 51a of the seedling tray 50 fed from the terminal end 212b of the conveying support rod 212 of the downstream conveying path 201b, and intermittently rotates and drives in synchronization with the time of the vertical movement of the feed claw 211, thereby conveying the empty seedling tray 50 to the recovery device 300 side;

2. a pair of left and right rail members 330L, 330R having a substantially L-shaped long plate shape in cross section in the direction of the longitudinal straight line, which support the long-side end portions 53a of the left and right long sides 53L, 53R of the seedling tray 50 fed out from the conveying roller 320 and guide the seedling tray forward (corresponding to a first posture), and which can drop the seedling tray 50 guided forward (corresponding to a second posture) for a predetermined period of time;

3. the pair of left and right rail guide members 310L, 310R are members that are fixedly welded to rear end portions of the pair of left and right rail members 330L, 330R so as to project rearward, and the bottom portions 51b and the like at both left and right ends on the front end side of the seedling tray 50 conveyed to the vicinity of the terminal end portion 212b of the conveying support rod 212 of the downstream conveying path 201b come into contact with the members to start turning, and transition from the non-retracted posture to the retracted posture, and the pair of right and left rail members 330L, 330R are switched to a first posture capable of supporting the seedling tray 50, further, the peripheries of the long side end edges 53b of the left and right ends of the seedling tray 50, the bottom 51b, and the like do not come into contact with the members, thereby the member is rotated in the direction opposite to the above-mentioned rotation, and the transition from the retreat posture to the non-retreat posture is made and the pair of right and left rail members 330L, 330R is switched to the second posture in which the seedling tray 50 cannot be supported;

4. a seedling tray pressing lever 301 for preventing the seedling tray 50 from being shifted in the left-right direction and falling off from the rail members 330L and 330R in the middle of being conveyed on the pair of left and right rail members 330L and 330R;

5. a pair of left and right rail member front side support fasteners 341L, 341R that rotatably support the front sides of both end portions in the long direction of the long plate shape of the pair of left and right rail members 330L, 330R;

6. a pair of left and right rail member rear support fasteners 342L, 342R that rotatably support the rear side of the long plate-shaped longitudinal both end portions of the pair of left and right rail members 330L, 330R; and

7. the seedling tray housing cage 350 is formed mainly of a wire rod or the like having a circular cross section, and receives and houses the seedling trays 50 dropped from the pair of left and right rail members 330L, 330R.

Further, upper end portions of the pair of right and left rail member front side supporting and fixing members 341L, 341R are fixed to the lower surface of the conveyance path 201a on the upstream side of the seedling tray conveying device 210, and lower end portions of the pair of right and left rail member rear side supporting and fixing members 342L, 342R are fixed to the rear end portion of the seedling tray housing cage 350.

Fig. 6 (fig. 9) is a schematic partially enlarged side view of the lower portion of the planting device 200 and the periphery thereof for explaining the mounting structure of the roller holder 110 holding the frame of the leveling roller 100.

Next, the planting part frames 240a and 240b will be explained. A planting main frame 240a supporting the planting device 200 and located at the center, and side frames 240b fixed to left and right sides of the planting main frame 240a and extending in the left and right directions of the planting device 200 are provided.

The planting main frame 240a is a main part supporting the planting device 200, and is firmly configured to protrude toward the front side of the machine body to a greater extent than the side frames 240 b.

A part (central portion) of the planting main frame 240a becomes a shape positioned above the leveling frame 100a (leveling roller 100).

The side frame 240b is located at a position rearward of the body with respect to the leveling frame 100a (leveling roller).

The leveling frame 100a constituting the leveling roller 100 is arranged to extend in the left-right direction of the leveling roller.

In the riding rice transplanter 1 of the present embodiment, as shown in fig. 3, the leveling fixtures 110a and 110b are configured in a posture in which they face downward from the planting main frame 240a (side frame 240 b).

In addition, the planting device includes a first flat fixing member 110a supported by the planting main frame 240a and a second flat fixing member 110b supported by the side frame 240b, and the first flat fixing member 110a or the second flat fixing member 110b is located between the plurality of planting devices 200 in a plan view of the body.

Between 2 planting devices adjacent to the center of the body in the case of a top view of the body, among the plurality of planting devices 200, is a first flat fixing member 110a, and between 2 planting devices 200 adjacent to the outside of the body in the case of a top view of the body, among the plurality of planting devices 200, is a second flat fixing member 110 b.

Further, in the case of the main or rear view of the body, the first flat fixing member 110a is located between 2 taking out devices 201c adjacent to each other in the center of the body among the plurality of taking out devices 201c, and the second flat fixing member 110b is located between 2 taking out devices 201c adjacent to each other in the outer side of the body among the plurality of taking out devices 201c in the case of the main or rear view of the body.

Also, the first leveling fixer supports the central portion of the leveling roller 100 (the rear of the central roller 120) by 2-root members.

In addition, the second flat fixing members 110b are provided at both left and right sides of the body, between the planting device 200 at the left end and the adjacent planting device 200, and between the planting device 200 at the right end and the adjacent planting device 200, and are composed of 2 root parts.

The first flat fixing member 110a is oriented downward in the body, and the second flat fixing member 110b is oriented downward in the front of the body.

Thus, compared to a conventional structure in which weight is increased, weight reduction and improvement in rigidity are achieved at the same time, because the roller shaft is damaged due to insufficient rigidity, which is disadvantageous to the rigidity, by building a leveling fixture on the side frames 240b extending from the planting portion hanging base (planting main frame 240a) to the left and right and hanging the roller.

Next, an installation structure of the motor fixture 510 to which the motor 500 for raising and lowering the leveling rollers 100 is installed in the riding rice transplanter 1 will be described with reference to fig. 6.

In addition, first and second flat-shaping fasteners 110a, 110b are positioned between the plurality of seedling retrieval devices 201c in the rear case.

A second flat fixing member 110b is provided between the seedling removing device 201c on the outside of the machine body and the adjacent seedling removing device 201c, and a first flat fixing member 110a is provided between the seedling removing device 201c on the inside of the machine body and the adjacent seedling removing device 201 c.

Fig. 7 (fig. 3) is a schematic partially enlarged side view of the lower portion and the periphery of the planting device 200 for explaining the mounting structure of the motor fixture 510 to which the motor 500 for raising and lowering the leveling roller 100 is mounted.

In the riding rice transplanter 1 of the present embodiment, as shown in fig. 7 (fig. 3), the motor mount 510 is provided with the planting main frame 240a and the side frame 240b on the front side of the seedling tray conveying device 210, and the motor mount 510 connected to the planting main frame 240a and supporting the motor 500 capable of raising and lowering the leveling device is attached, similarly to the leveling mount described above.

The motor fixing member 510 is configured to be positioned at a rear lower position of the recovery device 300 above the planting main frame 240a and the side frame 240 b.

Therefore, muddy water, rainwater, and the like in the farmland are less likely to adhere to the motor 500, and thus contribute to prevention of troubles.

Thus, compared to the conventional structure in which the lifting of the leveling roller is manual, and thus the number of components increases and the weight increases, the installation of the components constituting the leveling roller is concentrated on the planting main frame 240a, and thereby, the great weight reduction, the reduction in the number of components, and the strength improvement can be simultaneously achieved.

Next, a coupling structure between the lifting gear 520 and the lifting arm 530 when the leveling roller 100 is lifted and lowered by the motor 500 in the riding rice transplanter 1 will be described with reference to fig. 8(a) and 8 (b).

Fig. 8(a) is a partially enlarged schematic side view of the leveler roller 100 for explaining a coupling structure between the lifting gear 520 and the lifting arm 530, and fig. 8(b) is an enlarged schematic side view of the leveler roller formed integrally with the lifting gear 520, forming an arm 540 on the front side of the machine body of the lifting gear 520, and coupling the lifting arm 530 to the arm 540. Is a partially enlarged schematic side view of the leveling roller 100 for explaining the pulling spring 550 provided between the center roller 120.

In the rice transplanting machine 1 of the present embodiment, as shown in fig. 8(a) and 8(b), in the configuration in which the leveling roller 100 is moved up and down by the motor 500, the leveling arm 540 is provided between the lifting gear 520 and the lifting arm 530.

The leveling arm 540 is rotatably coupled to an upper end portion of the elevating arm 530 via a first coupling shaft 541. Further, an arc-shaped elongated hole 542 is formed on the rear end side of the flat arm 540 (fig. 8 a and 8 b).

The elevating gear 520 is formed in a substantially fan shape, and a portion corresponding mainly to the fan shape is rotatably coupled to the leveling arm 540 through the rotation center 543 (fig. 8 a and 8 b). Further, a slide pin 521 (fig. 8 a and 8 b) is provided upright on a side surface of the elevating gear 520 at a position in which it is loosely fitted and connected to an arc-shaped elongated hole 542 formed in the leveling arm 540.

According to the above configuration, even when the leveling roller 100 is pushed up by the unevenness of the field surface, the leveling arm 540 rotates clockwise around the rotation center 543 and the elongated hole 542 formed in the leveling arm 540 similarly rotates in the drawing (side view) shown in fig. 8(b), and the slide pin 521 erected on the side surface of the elevating gear 520 slides in the elongated hole 542 toward the upper end side of the elongated hole 542, so that the transmission of the load and the overload to the elevating gear 520 side is reduced.

Thus, when the leveler roller 100 is pushed up by the unevenness of the farmland surface, the push-up load or the overload can be released via the leveler arm 540, and the durability of the leveler roller 100, the lifting gear 520, and the like can be ensured.

In the rice transplanting machine 1 of the present embodiment, as shown in fig. 8(b), the pulling spring 550 of the center roller 120 is hooked on the leveling arm 540.

Thus, the center roller 120 can be pulled in a direction closer to the vertical direction by hooking the pulling spring 550 to the leveling arm 540, as compared with the conventional configuration in which the pulling spring of the center roller is hooked to the lift arm. Further, since the tension spring is hooked to the arm that raises and lowers the leveler roller 100, the hooking position of the tension spring 550 is changed in proportion to the raising and lowering of the leveler roller 100, and the displacement range of the tension angle and the load is reduced.

Further, as shown in fig. 3, the elevating gear 520 and the elevating arm 530 may be directly coupled to each other.

That is, the elevating gear 520 and the leveling arm 540 may be integrally formed, and the slide pin 521 and the long hole 542 may be omitted. In this configuration, the pull spring 550 may also be hung on the upper portion of the lifting arm 530.

Further, a rotation center 543 of the up-down gear 520 is provided, an upper end portion of the up-down arm 530 is coupled to be able to move up and down by a coupling shaft 541 provided on one side with respect to the rotation center 543, and the up-down gear 520 is provided on the other side with respect to the rotation center 543. This enables the leveling roller 100 to be raised and lowered in a state where it is difficult to apply a load to the motor 500.

Further, a lifting arm 530 and a lifting gear 520 for lifting the leveling roller 100 are provided, a gear frame 520a for fixing the lifting gear 520 is provided on the front side of the body of the motor fixture 510, and the rotational force from the motor 500 is transmitted to the lifting gear 520, and the lifting arm 530 is coupled to the front end of the body of the lifting gear 520.

Further, the gear frame 520a may be fixed to the front side of the motor mount 510, and the gear frame 520a and the motor mount 510 may be formed in an integrated manner.

Claims (4)

1. A seedling transplanter is provided with a planting device (200) for planting seedlings in a farmland and a leveling device for leveling the farmland in which the seedlings are planted, and is characterized in that,

a planting main frame (240a) for supporting the planting device (200) and side frames (240b) fixed on the left and right sides of the planting main frame (240a), wherein the planting main frame (240a) is formed into a shape protruding towards the front side of the machine body than the side frames (240b),

arranging a leveling frame (100a) constituting the leveling device and a leveling fixture holding the leveling frame (100a), the leveling fixture including a first leveling fixture (110a) supporting the leveling frame (100a) from the planting main frame (240a) and a second leveling fixture (110b) supporting the leveling frame (100a) from the side frame (240b), the second leveling fixture (110b) being in a posture of supporting a lower position toward the front of the body than the first leveling fixture (110 a).

2. The seedling transplanter according to claim 1,

setting: a seedling tray conveying device (210) for conveying the seedling trays (50) from the upstream side to the downstream side of the conveying path (201); a seedling taking-out device (201c) for taking out the potted seedlings from the seedling tray (50) being conveyed by the seedling tray conveying device (210); the planting device (200) is used for planting the hole seedlings taken out by the seedling taking-out device in a farmland; and a recovery device (300) for recovering the seedling trays (50) sent from the terminal end of the conveying path (201), wherein the planting main frame (240a) and the side frames (240b) are arranged on the front side of the seedling tray conveying device (210), a motor fixing member (510) is installed on the planting main frame (240a), the motor fixing member (510) supports a motor (500) capable of lifting the leveling device,

the motor fixing member (510) is located above the planting main frame (240a) and the side frame (240b) and behind the recovering device (300).

3. The seedling transplanter according to claim 2,

a lifting arm (530) and a lifting gear (520) which can lift the leveling device are arranged, a gear frame (520a) which supports a rotation center (543) of the lifting gear (520) is arranged at the front side of the body of the motor fixing member (510), and the lifting arm (530) is lifted by transmitting the rotation force from the motor (500) to the lifting gear (520),

the lifting gear (520) is provided on the rear side of the body with respect to the rotation center (543), and the lifting arm (530) is disposed on the front side of the body with respect to the rotation center (543).

4. The seedling transplanter according to claim 3,

providing a leveling arm (540) that rotates integrally with the lifting arm (530),

the device is provided with a yielding part which enables the leveling arm (540) to move relative to the lifting gear (520).

Images