阅读说明：本技术 移植机 (Transplanting machine ) 是由 村并昌实 大久保嘉彦 山根畅宏 东幸太 田崎昭雄 于 2019-09-02 设计创作，主要内容包括：本发明提供移植机,能够不与升降连杆机构等干涉地自由地进行左右栽种装置的行间的调节。所述移植机将用于使栽种苗的栽种料斗(20a、20b)升降的升降部件(21)的后部侧能够转动地设置于连杆支架(210),在连杆支架(210)的后部侧形成切口部(221),将连结部件(209)配置于切口部(221),在连杆支架(210)设置调节支撑板(222),在调节支撑板(222)形成左右方向的长孔(224),将支撑栽种料斗(20a、20b)的料斗支架(225)与调节支撑板(222)连结,连结部件(209)构成为能够切换为,解除调节支撑板(222)和料斗支架(225)的连结而使栽种料斗(20a、20b)能够沿左右方向移动的状态和连结调节支撑板(222)和料斗支架(225)而将左右位置固定的状态。(The invention provides a transplanter which can freely adjust the row spacing of a left planting device and a right planting device without interfering with a lifting link mechanism and the like. The transplanter is provided with a link bracket (210) on which the rear side of a lifting member (21) for lifting planting hoppers (20a, 20b) for planting seedlings is rotatably provided, a notch part (221) is formed on the rear part side of the link bracket (210), a connecting member (209) is arranged on the notch part (221), an adjustment support plate (222) is provided on the link holder (210), a long hole (224) in the left-right direction is formed in the adjustment support plate (222), a hopper holder (225) for supporting the planting hoppers (20a, 20b) is connected to the adjustment support plate (222), and the connection member (209) is configured to be switchable between a state in which the connection between the adjustment support plate (222) and the hopper holder (225) is released to allow the planting hoppers (20a, 20b) to move in the left-right direction and a state in which the adjustment support plate (222) and the hopper holder (225) are connected to fix the left-right position.)

1. A transplantation machine is provided with: a seedling supply device (43) for supplying seedlings; planting hoppers (20a, 20b) for planting the seedlings supplied from the seedling supply device (43); and a lifting member (21) for lifting the planting hoppers (20a, 20b), the transplanting machine is characterized in that,

a rear part side of the lifting member (21) is rotatably arranged on the connecting rod bracket (210), a notch part (221) is formed on the rear part side of the connecting rod bracket (210), a connecting member (209) for connecting the planting hoppers (20a, 20b) on the connecting rod bracket (210) is arranged on the notch part (221),

an adjustment support plate (222) is provided on the link bracket (210), a long hole (224) in the left-right direction is formed in the adjustment support plate (222), a hopper bracket (225) for supporting the planting hoppers (20a, 20b) is connected to the adjustment support plate (222),

the connecting member (209) can be switched between a state in which the adjustment support plate (222) and the hopper holder (225) are disconnected to allow the planting hoppers (20a, 20b) to move in the left-right direction and a state in which the adjustment support plate (222) and the hopper holder (225) are connected to fix the left-right position.

2. The grafting machine of claim 1,

the adjustment support plate (222) is fitted to the cutout portion (221),

an adjustment space (223) is formed between the notch (221) and the adjustment support plate (222).

3. Transplanting machine according to claim 1 or 2,

the left and right center parts of the adjustment support plate (222) are located at the rear part of the lifting member (21).

4. Transplanting machine according to claim 1 or 2,

the lifting mechanism (21) comprises an upper link arm (21a) and a lower link arm (21b),

the position of the upper link arm (21a) mounted on the link holder (210) is located on the front side of the machine body with respect to the position of the lower link arm (21b) mounted on the link holder (210).

5. Transplanting machine according to claim 1 or 2,

a transmission case (26) for driving the lifting member (21) to lift is provided, a lifting crank (215) for rotating the lifting member (21) up and down is provided, the lifting crank (215) is configured to rotate by receiving a driving force from the transmission case (26), a connecting plate (216) for connecting the lifting crank (215) is provided on the lifting mechanism (21),

the connecting position of the connecting plate (216) and the lifting crank (215) is configured to be connected to the lower side of the machine body than the lifting mechanism (21), and the connecting plate (216) is located on the inner side of the machine body than the lifting mechanism (21).

Technical Field

The invention relates to a transplanter for transplanting seedlings to farmland.

Background

Conventionally, a seedling transplanter which plants seedlings supplied from a seedling supply device by a plurality of seedling containers is known, and the seedling transplanter is a transplanter which can plant seedlings in two rows on the left and right (see, for example, patent documents 1 and 2).

The transplanter is configured to be able to move the planting device along an adjustment lever provided in a link holder of the lift link mechanism and protruding in the left-right direction, and to set a suitable left-right interval of seedlings, i.e., a so-called row interval, in accordance with conditions.

Disclosure of Invention

However, in the transplanter of patent document 1, since the lifting link mechanism is located at a position for restricting the lateral movement of the transplanting device, particularly the movement toward the narrow row side, there is a problem that the transplanting operation between the narrow rows which is not fixed or more cannot be handled.

Further, in the transplanter of patent document 2, the moving mechanism of the planting device is configured to move in the left and right directions along the adjustment rod penetrating the lifting link mechanism, and therefore, the movement of the lifting link mechanism is not hindered, but when the moving mechanism is moved to the row-to-row narrowing side, the left and right moving mechanisms come into contact with each other, and therefore, there is a problem that the planting operation between the narrow rows which are not less than fixed cannot be handled.

In view of the above-described problems, an object of the present invention is to provide a transplanter which performs adjustment between rows of right and left planting devices without interfering with a lifting link mechanism or the like.

In order to solve the above problems, the following means are adopted.

The invention according to claim 1 is a transplantation device including: a seedling feeder 43 for feeding seedlings; planting hoppers 20a, 20b for planting the seedlings fed from the seedling feeder 43; and a lifting member 21 for lifting the planting hoppers 20a, 20b, wherein the rear part side of the lifting member 21 is rotatably provided on the link bracket 210, a notch 221 is formed on the rear side of the link bracket 210, a connecting member 209 for connecting the planting hoppers 20a and 20b to the link bracket 210 is disposed in the notch 221, an adjustment support plate 222 is provided on the link bracket 210, a long hole 224 is formed in the adjustment support plate 222 in the left-right direction, a hopper bracket 225 for supporting the planting hoppers 20a and 20b is coupled to the adjustment support plate 222, the coupling member 209 can be switched between a state in which the adjustment support plate 222 and the hopper holder 225 are decoupled and the planting hoppers 20a and 20b can move in the left-right direction and a state in which the adjustment support plate 222 and the hopper holder 225 are coupled and the left-right position is fixed.

In the invention according to claim 2, in addition to claim 1, the adjustment support plate 222 is fitted to the notch 221, and an adjustment space 223 is formed between the notch 221 and the adjustment support plate 222.

In the invention according to claim 3, in addition to claim 1 or 2, the left and right center portions of the adjustment support plate 222 are located at the rear portion of the vertically movable member 21.

The invention according to claim 4 is the invention according to claim 1 or 2, wherein the lifting mechanism 21 includes an upper link arm 21a and a lower link arm 21b, and a position where the upper link arm 21a is attached to the link holder 210 is located on the front side of the machine body with respect to a position where the lower link arm 21b is attached to the link holder 210.

The invention according to claim 5 is the one according to claim 1 or 2, wherein a transmission case 26 for driving the vertically movable member 21 to be vertically movable is provided, a vertically movable crank 215 for vertically movable the vertically movable member 21 is provided, the vertically movable crank 215 is configured to be rotated by receiving a driving force from the transmission case 26, a connecting plate 216 for connecting the vertically movable crank 215 is provided to the vertically movable member 21, a connecting position of the connecting plate 216 to the vertically movable crank 215 is configured to be connected to a lower side of the vertically movable member 21, and the connecting plate 216 is located inside the vertically movable member 21.

The present invention has the following effects.

According to the invention of claim 1, since the planting hoppers 20a and 20b are movable left and right by the connecting member 209, the left and right positions of the planting hoppers 20a and 20b can be changed to adjust the inter-plant distance between seedlings, and therefore, the operation can be performed between plants in accordance with the type of seedlings and the cultivation conditions.

Further, since the connecting member 209 is provided in the notch 221 formed in the link bracket 210, the connecting member 209 can be operated by utilizing the space of the notch 221, and thus the movable state and the fixed state of the seed hoppers 20a and 20b can be easily switched, and the work efficiency is improved.

Further, since the range of moving the hopper holder 225 is easily grasped by forming the long holes 224 in the left-right direction, the hopper holder 225 can be prevented from coming off from the left and right end portions of the adjustment support plate 222, and the work efficiency can be improved.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, by forming the adjustment space 223 between the notch 221 and the adjustment support plate 222 in the front-rear direction, the space for operating the connection member 209 can be sufficiently secured, the movable state and the fixed state of the planting hoppers 20a and 20b can be easily switched, and the work efficiency is improved.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, by positioning the right and left center portions of the adjustment support plate 222 at the rear portion of the elevating mechanism 21, it is possible to ensure that the adjustment range of the right and left positions of the planting hoppers 20a, 20b is wide in the right and left direction.

In addition, since the elevating mechanism 21 does not interfere with the left and right movement of the planting hoppers 20a and 20b, the adjustment range of the left and right positions of the planting hoppers 20a and 20b can be further secured.

According to the invention of claim 4, in addition to the effect of the invention of claim 1 or 2, since the position where the upper link arm 21a is attached to the link holder 210 is located further toward the front side of the machine body than the position where the lower link arm 21b is attached to the link holder 210, the planting hoppers 20a and 20b can be tilted forward near the top dead center of the elevating path, and therefore, the supplied seedlings can be guided obliquely toward the inner lower portions of the planting hoppers 20a and 20b, and the seedlings can be reliably planted in the farmland.

Further, since the planting hoppers 20a and 20b can be changed from the backward inclined posture to the forward inclined posture in the vicinity of the bottom dead center of the elevating trajectory, the planting hoppers 20a and 20b can suppress the forward and backward range of the hole in the field surface, and can prevent the seedling after planting from falling or changing to the inclined posture, thereby preventing the occurrence of the growth failure.

According to the invention of claim 5, in addition to the effect of the invention of claim 1 or 2, the center of gravity can be made lower by connecting the connecting plate 216 and the lifting crank 215 to the lower side of the machine body than the lifting mechanism 21, and therefore the machine body is less likely to tilt forward and backward due to the weight of the components and the like, and the planting depth and planting posture of the seedling are stabilized.

Further, by positioning the connecting plate 216 inside the machine body with respect to the lifting mechanism 21, the lifting mechanism 21 does not directly receive a load from the lifting crank 215, and durability of the lifting mechanism 21 is improved.

Drawings

Fig. 1 is a left side view of the transplanter.

Fig. 2 is a right side view of the transplanter.

Fig. 3 is a rear view of the transplanter.

Fig. 4 is a top view of the transplanter.

Fig. 5 is a side view showing the elevating mechanism and the row adjusting mechanism of the right and left planting hoppers.

Fig. 6 is a plan view showing the elevating mechanism and the inter-row adjusting mechanism of the right and left planting hoppers.

FIG. 7 is a rear view showing the elevating mechanism and the inter-row adjusting mechanism of the right and left planting hoppers.

Fig. 8 is a perspective view showing the elevating mechanism and the inter-row adjusting mechanism of the right and left planting hoppers.

Fig. 9 is a rear view showing a main part of the opening and closing mechanism of the planting hopper.

Fig. 10 (a) is a rear view showing a main portion of the adjustment support plate, and (b) is a front view showing the main portion of the adjustment support plate.

In the figure: 20 a-planting hopper, 20 b-planting hopper, 21-lifting mechanism, 21 a-upper link arm, 21 b-lower link arm, 26-transmission box, 43-seedling feeding device, 209-connecting component, 210-link bracket, 215-lifting crank, 216-connecting plate, 221-notch part, 222-regulating support plate, 224-long hole, 225-hopper bracket.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a left side view showing the transplanter 10, fig. 2 is a right side view, fig. 3 is a rear view, and fig. 4 is a plan view.

In the following description, the side on which the handle 47 is disposed is the rear side, and the opposite side, i.e., the side on which the engine 41 is disposed, is the front side. The right-hand side toward the front side of the body is the right side, and the left-hand side is the left side.

The transplanter 10 of the present application includes: a traveling vehicle body 40 for allowing the body to travel forward; a steering handle 47 provided at the rear of the running vehicle body 40; a planting device 42 for planting seedlings to farmland; and a seedling supplying device 43 for supplying seedlings to the planting device 42.

The traveling vehicle body 40 includes: an engine 41; left and right rear wheels 44 driven to rotate by transmitting the power of the engine 41; and left and right front wheels 45 rotatably provided in front of the rear wheel 44.

A transmission case 39 is disposed on the rear side of the engine 41, and the transmission case 39 has a case portion extending toward the left side of the engine 41 at the left side portion, and the case portion is coupled to the left side portion of the engine 41 to transmit power to a transmission mechanism in the transmission case 39.

The front part of the traveling transmission case 38, which is long in the front-rear direction, is rotatably attached to both left and right side parts of the transmission case 39. Specifically, an axle box that is rotatable integrally with the travel transmission case 38 is provided at the inside of the body of the front portion of the travel transmission case 38, the axle box is rotatably attached to both the left and right side portions of the transmission case 39, and the travel transmission case 38 is rotatably provided so as to correspond to both the left and right side portions of the transmission case 39. A rear wheel 44 is mounted on the rear wheel axle 12 projecting laterally to the rear of the travel transmission case 38.

At the position of the rotational axis of the front portion of the travel transmission case 38, the front ends of the wheel drive shafts extending from the transmission case 39 to the left and right outer sides enter, and the power for traveling is transmitted to the transmission mechanism in the travel transmission case 38 through the traveling transmission portion in the transmission case 39. Then, the power for traveling is transmitted to the rear end axle 12 of the traveling transmission case 38 via the transmission mechanism in the traveling transmission case 38, and the rear wheel 44 is driven to rotate.

The drive of the left and right rear wheels 44 can be cut off by left and right clutches (not shown) provided in the transmission case 39. Thus, when the body is rotated, the rear wheel 44 on the inner side of the rotation can be smoothly rotated in a non-driving state.

Further, the traveling transmission case 38 is equipped with a vertical pivoting mechanism for vertically pivoting the rear wheels 44 with the front side of the traveling transmission case 38 as a pivot point. Specifically, an arm 13 extending upward is integrally provided on a mounting portion of the travel transmission case 38 to the transmission case 39, and the arm 13 is connected to both right and left sides of a connecting body attached to a front end of a piston rod of the lift cylinder 300 fixed to the transmission case 39. One of the left and right sides (right side) is connected by a connecting rod, and the other side (left side) is connected by a horizontal control cylinder which can perform telescopic operation corresponding to the inclination of the machine body.

When the lift cylinder 300 is operated to project the piston rod rearward of the machine body, the left and right arms 13 rotate rearward, and the travel transmission case 38 rotates downward along with this, so that the machine body is raised. Conversely, when the piston rod of the lift cylinder 300 moves forward in the machine body and is accommodated in the cylinder, the left and right arms 13 rotate forward, and the travel transmission case 38 rotates upward along with this, and the machine body descends.

The lift cylinder 300 operates by a sensor 14 which is grounded to the ridge surface and operates in accordance with the variation in the vertical interval between the machine body and the ridge surface. The operation of the sensor 14 is an operation for detecting the height of the upper surface of the ridge with reference to the position of the machine body, and the machine body is set to a set height corresponding to the height of the upper surface of the ridge based on the detection operation of the sensor 14, so that the lift cylinder 300 is operated.

When the horizontal control cylinder is extended or contracted, the left arm 13 connected to the horizontal control cylinder is rotated, and only the left rear wheel 44 is moved up and down, thereby tilting the machine body in the left-right direction. The horizontal control cylinder operates based on the detection result of a sensor for detecting the left and right inclination of the machine body with the left and right horizontal levels as a reference, and makes the machine body horizontal.

On both right and left sides of a horizontal frame 16 rotatably attached around an axis in the front-rear direction at a right and left center position below an engine 41, vertical frames 17 elongated in the up-down direction are provided. The left and right front wheels 45 are rotatably provided on a front wheel axle 18 fixed to the side of the lower end portion of the vertical frame 17. Thus, the left and right front wheels 45 can freely roll around the axis in the front-rear direction at the left-right center of the machine body. The vertical frames 17 are provided so as to be adjustable up and down with respect to both right and left side portions of the lateral frame 16, and the height of the front wheel 45 can be adjusted.

The steering handle 47 is provided at the rear of the body and is located on the rear side of the body with respect to the rear wheel axle 12 of the rear wheel 44. Specifically, the rear end portion of the body frame 19 is provided, the front end portion of which is fixed to the transmission case 39.

The body frame 19 extends rearward at the left-right center of the body, and extends obliquely rearward and upward from the front-rear middle portion.

The handle 47 extends rearward from the rear end of the body frame 19 in the left-right direction, and each rear end serves as a grip portion of the handle 47.

The planting device 42 includes: a plurality of planting tools in the shape of a mouth; a lifting mechanism 21 for lifting the planting tool to a position above the lower end of the planting tool and a position below the farmland surface; and an opening/closing mechanism for opening/closing the planting tool so that the lower end of the planting tool in the shape of a nozzle is closed to receive the seedling from above and to store the seedling inside, and an open state in which the lower end of the planting tool is opened to the left and right and the seedling stored inside can be discharged downward.

As shown in fig. 1 to 8, the planting device 42 is configured to plant the planting hoppers 20a and 20b in two rows arranged in the left-right direction. The planting hopper 20a and the second planting hopper 20b are respectively assembled on the lifting mechanisms 21 arranged at the left and right sides of the transmission case 26 transmitted from the transmission case 39.

The lifting mechanism 21 is composed of upper and lower link arms 21a, 21b, and the upper link arm 21a and the lower link arm 21b are respectively attached to the transmission case 26 so that the front end portions thereof can be vertically rotated and the rear end portions thereof are respectively attached to the left and right sides of the left and right link holders 210 so that the rear end portions thereof can be vertically rotated. The upper link arm 21a is provided at a position spaced apart from the rotational axis of the swing rotating body 211 rotatably attached to the transmission case 26 toward the outer peripheral edge portion, and swings the seed hoppers 20a and 20b moved up and down by the elevating mechanism 21 from the front to the rear.

The transmission case 26 is fixed to the lower portion and fixed to the upper portion of the attachment member of the body frame 19. The planting hoppers 20a and 20b and the elevating mechanism 21 are located at the rear end portions thereof on the rear side of the machine body in a side view, and each outside of the machine body is a space portion where no other component is present.

In particular, the position where the swing rotary body 211 is fitted with the tip end portion of the upper link arm 21a is selected as a position where the planting hoppers 20a, 20b are changed from the backward inclined posture to the substantially vertical posture with respect to the surface of the farmland between the time of receiving the seedling and the bottom dead center, and from the vertical posture to the forward inclined posture when they are raised from the bottom dead center, in the static orbit of the planting hoppers 20a, 20 b.

Thus, the time and distance for the seedlings to enter the soil can be shortened in the moving trajectory of the planting hoppers 20a and 20b, so that the planting holes formed in the planting hoppers 20a and 20b can be made small, and the seedlings can be prevented from falling down and disturbing the planting posture.

Further, the upper end portions of the planting hoppers 20a and 20b can be brought close to the drop-and-feed position of the seedling feeder 43 by the position of the planting hoppers 20a and 20b being largely tilted forward near the top dead center, and therefore, it is possible to prevent the occurrence of plant shortage due to the seedlings not being fed into the planting hoppers 20a and 20 b.

Further, since the planting hoppers 20a and 20b are inclined when the seedlings are dropped and supplied, the seedlings entering the planting hoppers 20a and 20b can slide down from the upper side to the lower side, and thus, the seedlings in the planting hoppers 20a and 20b are prevented from being planted in the farmland and being out of stock.

Further, an adjustment plate 212 having a plurality of arc-shaped adjustment long holes 212a … is disposed between the swing rotary body 211 and the upper link arm 21a, and the front-rear tilt angle of the planting hoppers 20a, 20b can be adjusted by changing the position of a fixing member such as an insertion bolt in the adjustment long holes 212a ….

Accordingly, since the front and rear inclination angles of the planting hoppers 20a and 20b can be appropriately adjusted according to the operation conditions such as the length of the seedling and the planting depth, the seedling can be planted in a posture and the planting depth suitable for growth, and the seedling can grow well.

The lifting driving force of the lifting mechanism 21 is transmitted from a lifting driving shaft 213 provided on the rear side of the body with respect to the rotation shaft of the swing rotating body 211. A rotating cam 214 having an irregular circular shape is attached to the elevation drive shaft 213, and an elevation crank 215 for vertically rotating the upper link arm 21a is provided between the rotating cam 214 and the upper link arm 21a in the left-right direction. The lower link arm 21b rotates up and down in conjunction with the upper link arm 21a, and the lifting mechanism 21 is a parallel link.

The lifting crank 215 has one end attached to a rotating shaft extending from the rotating cam 214 to the outside of the machine body and the other end attached to a connecting plate 216 provided on the inside of the machine body of the upper link arm 21a, so that the trajectories of the planting hoppers 20a and 20b are adapted to the planting of the seedling and the reception of the seedling from the seedling feeder 43.

The connecting plate 216 projects downward from the upper link arm 21a, and has a lower end portion disposed slightly above the upper end portion of the lower link arm 21b, and the other end portion of the lifter crank 215 is attached near the lower end portion of the connecting plate 216.

According to the above configuration, since the lifting crank 215 is disposed below the machine body, the center of gravity is located below the machine body, and thus the machine body is less likely to tilt in the front-rear direction, and the planting depth and planting posture of the seedling are stabilized.

Further, since the other end portion of the lifter crank 215 is attached to the coupling plate 216, the upper link arm 21a is configured not to directly receive a load from the lifter crank 215, and thus the durability of the upper link arm 21a is improved.

As described above, since the load applied is small due to the lifting operation, the upper link arm 21a and the lower link arm 21b may be formed of hollow angular tubes. If the upper link arm 21a and the lower link arm 21b are light in weight, the load transmitted to the transmission case 26 by the lifting crank 215 and the rotating cam 214 becomes small, and therefore the durability of the transmission case 26 is also improved.

In addition, the ascending speed is not too slow or the descending speed is not too fast due to the weight, the ascending and descending tracks of the planting hoppers 20a and 20b are stable, the planting posture and the planting depth of the seedling are stable, and the growth is good.

Further, since the upper link arm 21a and the lower link arm 21b are configured not to interfere with each other when vertically rotating by disposing the rotating cam 214, the lifting crank 215, and the coupling plate 216 between the transmission case 26 and the lifting mechanism 21 on the left and right, both the upper link arm 21a and the lower link arm 21b can be made linear, and the structure can be simplified and the strength can be maintained.

In addition, in order to make the lifting and tilting back and forth of the planting hoppers 20a and 20b more suitable for planting seedlings, the front and back lengths of the upper link arm 21a and the lower link arm 21b are made different. In the present application, the upper link arm 21a is configured to be shorter than the lower link arm 21 b.

The rear end portions of the upper link arm 21a and the lower link arm 21b are fitted between the left and right sides of the left and right link holders 210 with a vertical gap therebetween as described above, and at this time, the fitting position of the upper link arm 21a is positioned further toward the front side of the machine body than the fitting position of the lower link arm 21 b.

Thus, when the planting hoppers 20a and 20b are raised to the vicinity of the top dead center, the distance between the fulcrums at the rear end portions of the upper link arm 21a and the lower link arm 21b is increased, and the amount of forward and backward movement of the planting hoppers 20a and 20b is suppressed to be small, so that the amount of forward and backward movement of the upper sides of the planting hoppers 20a and 20b near the drop-down feeding position of the seedling feeder 43 is less likely to change, and the loss of the received seedlings is reduced.

Further, when the planting hoppers 20a and 20b are raised to the vicinity of the bottom dead center, the distance between the supporting points of the rear end portions of the upper link arm 21a and the lower link arm 21b is shortened, and the amount of forward and backward swinging of the planting hoppers 20a and 20b is increased, so that the planting hoppers 20a and 20b can be changed from the backward tilting posture to the forward tilting posture, and the planting hoppers 20a and 20b can be prevented from contacting the seedling to cause the seedling to fall down and be injured.

An opening/closing arm 218 is attached to a front end portion of the lower link arm 21b so as to be rotatable forward and backward, an opening/closing wire 220 is attached to an upper end portion side, the opening/closing wire 220 operates an opening/closing mechanism that opens and closes the planting hoppers 20a and 20b in accordance with a lifting position. A contact roller 219 that comes into contact when a portion of the swing rotor 211 having a diameter equal to or larger than a certain value passes is provided on the upper rear side of the opening/closing arm 218.

When the swing rotary body 211 is in contact, the opening/closing arm 218 rotates forward to pull the opening/closing wire 220, whereby the planting hoppers 20a and 20b are closed, and when the swing rotary body 211 is not in contact, the opening/closing arm 218 rotates backward to loosen the opening/closing wire 220, whereby the planting hoppers 20a and 20b are opened.

The open position of the planting hoppers 20a and 20b is a period during which the seedlings are planted and raised from the middle of the descent, and the closed position is a period during which the seedlings are received and lowered again after the seedlings are planted and raised.

An コ -shaped notch 221 that opens toward the rear of the machine body is formed in each of the rear portions of the left and right hopper holders 210. The upper and lower portions of the notch 221 protrude the structure of the hopper holder 210 rearward of the machine body.

As shown in fig. 5 and 10, an コ -shaped adjustment support plate 222 having a front opening on the body in a side view is provided on the rear portion of the left and right hopper holders 210. The upper and lower projections 222a of the adjustment support plate 222 are formed with left and right notches 222b … at substantially the same intervals as the left and right intervals of the left and right hopper holders 210, respectively, and the hopper holders 210 are inserted into and mounted in the notches 222b …, respectively. At this time, an adjustment space 223 having a rectangular shape in a side view is formed between the notch 221 and the adjustment support plate 222 in the front-rear direction.

The adjustment support plate 222 is positioned behind the upper link arm 21a and the lower link arm 21b constituting the elevating mechanism 21 at the left and right center portions, protrudes to substantially the same length in the left and right direction, and has long holes 224 for adjusting the gap between the upper and lower walls positioned at the rear portion of the machine body in the left and right direction.

A hopper holder 225 is provided at the rear of the adjusting support plate 222 to support the planting hoppers 20a and 20b at the rear side of the machine body. The hopper holder 225 is formed with a connecting portion 225a formed by bending the upper side in an L shape toward the front side of the machine body, and with connecting portions 225b, 225b formed on both left and right sides and protruding toward the rear side of the machine body to be connected to the planting hoppers 20a, 20b via connecting members 209 such as bolts. Further, a mounting hole (not shown) for a coupling member 209 such as one or a plurality of bolts is formed in the left-right direction in a vertical wall surface below the coupling portion 225a and above the coupling portions 225b, 225 b. The hopper holder 225 is attached in a state where the L-shaped connecting portion 225a in side view is located along the upper and rear portions of the adjustment support plate 222 and the long holes 224 for inter-row adjustment and the mounting holes are located at the same vertical height. Thus, when the coupling member 209 is removed or loosened, the hopper holder 225 can slide in the left-right direction along the adjustment support plate 222.

When the left and right planting intervals, i.e., the row intervals, of the left and right planting hoppers 20a, 20b are adjusted, the coupling member 209 is detached or loosened as described above, the hopper holder 225 is moved to an arbitrary position within the left and right width of the adjustment support plate 222, and the mounting or tightening of the coupling member 209 is determined.

The coupling member 209 is inserted through the mounting hole of the hopper holder 225, and can be switched between a fixed position state and an inter-line adjustment state by screwing or unscrewing a nut provided on the adjustment space 223 side.

In the above configuration, the coupling member 209 enters the elongated hole 224 for inter-line adjustment, and the coupling member 209 serves as a stopper to prevent the hopper holder 225 from coming off from the left and right end portions of the adjustment support plate 222.

In the inter-row adjusting structure of the present application including the left and right planting hoppers 20a and 20b, the left and right interval of the left and right adjusting support plates 222 can be secured largely, and thus the left and right planting hoppers 20a and 20b do not interfere with each other even when the inter-row spacing between the left and right planting hoppers 20a and 20b is narrowed to the narrowest, that is, when the hopper holders 225 are moved to the inner end of the body of the adjusting support plates 222. This makes it possible to set the line interval narrower than before, and thus to cope with various operating conditions.

Further, since the adjustment support plate 222 is provided at the rear part of the elevating mechanism 21, the adjustment support plate 222 can be prevented from interfering with the left and right movement of the planting hoppers 20a and 20b, and therefore, the line interval can be set in a wider range over the left and right width of the adjustment support plate 222, and further, various working conditions can be dealt with.

Further, since the adjustment space 223 is formed between the front and rear spaces of the link bracket 210 and the opening of the adjustment support plate 222, the operator can tighten or loosen the nut in the space on the rear side of the left and right rear wheels 44 and on the outer side of the body, and thus the inter-row adjustment work can be performed efficiently.

Further, if the thickness of the nut is equal to or less than half the front-rear width of the adjustment space 223, a working space for receiving a nut attaching and detaching tool can be secured behind the upper link arm 21a and the lower link arm 21b, which are the left and right center portions of the adjustment support plate 222, so that the positions where the seed hoppers 20a and 20b cannot be fixed do not occur within the left and right width of the adjustment support plate 222, and necessary inter-row setting can be performed.

In the above-described inter-row adjusting mechanism, the left and right planting hoppers 20a, 20b move in substantially bilaterally symmetrical directions. For example, when the row spacing is 70cm, the left and right planting hoppers 20a and 20b are moved to the left and right outer ends of the adjustment support plate 222, and when the row spacing is 30cm, the left and right planting hoppers 20a and 20b are moved to the left and right inner ends of the adjustment support plate 222. The other lines are set to be movable to any position within the horizontal width of the adjustment support plate 222, but indicators may be provided on the adjustment support plate 222 to make the lines as many cm as possible to be visually understood.

However, depending on the kind of crop and the field environment, more than two rows, for example, four rows, may be planted on a wide ridge. In the case of planting four rows in one ridge in a reciprocating manner, the seedlings can be planted by shifting the planting position to the left and right sides of the advancing direction of the ridge and shifting the left and right planting hoppers 20a and 20b to the left and right sides of the adjusting support plate 222. This makes it possible to cope with various work conditions.

The planting hoppers 20a and 20b have an open space formed by cutting off the upper surface of the rear side and both the left and right sides of the machine body, with a hopper cover 226 covering the upper side of the hopper holder 225 toward the rear side of the machine body. Further, left and right pivot shafts 227 are provided between the rear wall surface of the hopper holder 225 and the rear wall surface of the hopper cover 226, respectively, and pivot arms 228 are pivotally attached to the pivot shafts 227, respectively. Most of the left and right pivoting arms 228 protrude upward from the open space.

The left and right pivot support shaft 227 is disposed below the body with respect to the notch 221 and the adjustment support plate 222 of the link bracket 210.

Accordingly, the pivot support shaft 227 on the hopper holder 225 side can be disposed on the lower side of the adjustment support plate 222 without a large front-rear interval from the link holder 210, and therefore the planting hoppers 20a and 20b can be compactly configured without being excessively positioned rearward.

In the pivot arm 228, an outer wire of the opening/closing wire 220 is attached to the outside of the body, an inner wire is connected to the inside of the body, and the left and right pivot arms 228 are pivoted by straightening and loosening the opening/closing wire 220.

Further, an コ -shaped opening/closing arm 230 is attached to the left/right pivot shaft 227 so as to be pivotable left/right, and left/right hopper holders 229 are attached to the lower portion thereof. The opening/closing arm 230 has a shape covering the front, rear, and upper side of the side surface of the hopper holder 229, and as shown in fig. 9, gear portions 230a in which left and right concave portions are alternately engaged in the vertical direction are formed on the upper side of the front and rear surfaces, respectively. The rotation amount of the opening/closing arm 230 is synchronized by the engagement of the gear portion 230a, and the opening degree is set so that the seedling can be opened from the planting hoppers 20a and 20b without being biased.

Further, support pins 232 are provided on the left and right sides of the lower portion of the body on the front and rear surfaces of the opening and closing arm 230, and springs 233 for urging the left and right opening and closing arms 230 in the direction of approaching each other are disposed on the front side or the rear side of the base body at the left and right support pins 232.

The hopper fixing member 229 is configured such that a bent portion is connected to the front and rear portions of the opening and closing arm 230 at upper front and rear portions, and semicircular notches (not shown) for fitting the left and right hopper structures 231 are formed at the inner side portions of the body at the bottom in the front and rear direction. The left and right hopper structures 231 are configured to be opened to a greater extent in the left-right direction toward the lower end portion side when opened, and to be substantially uniformly in contact with each other across the upper and lower end surfaces when closed. The hopper structure 231 is formed in a plate shape near the lower end thereof, and has a shape that reduces resistance when entering the ground.

Further, the hopper cover 226 is formed with an opening (not shown) having substantially the same diameter or a slightly smaller diameter at the uppermost portion of the left and right hopper structures 231, and a seedling guide 234 for guiding the seedlings supplied from the seedling supply device 43 into the left and right hopper structures 231 is attached to the opening. The upper end portions of the left and right hopper structures 231 have a larger diameter than the lower end portions thereof from the vicinity of the upper end portions.

The seedling guide 234 has substantially the same diameter below the hopper cover 226, and is configured to have a tapered shape in a side view and a rear view, with the diameter being larger on the upper side of the body than the hopper cover 226.

Since the upper side of the seedling guide 234 is tapered and the diameter of the upper end side is maximized, the seedling can be received even if the position where the seedling is dropped and supplied is shifted to some extent, and the loss of the seedling planted in the planting hoppers 20a and 20b can be prevented.

Further, by making the diameter of the lower portion side of the seedling guide 234 substantially the same as or slightly smaller than the diameter of the upper end portion of the hopper structure 231, a gap is not generated between the seedling guide 234 and the hopper structure 231, and therefore, it is possible to reliably transfer seedlings.

Each seedling container 22 has a tubular body having an upper and lower opening and a bottom cover for opening and closing the lower opening of the tubular body, and is connected to each other in a ring shape.

The moving mechanism 23 moves the coupled seedling receivers 22 in a circling motion leftward along an oblong annular trajectory which is long in the left and right directions as viewed in plan from the machine body in a state where the coupled seedling receivers 22 pass above and near the left and right planting hoppers 20a, 20 b.

The seedling dropping mechanism opens the bottom cover of the seedling container 22 at a position above the planting hoppers 20a, 20b corresponding to the seedling container 22.

A cylindrical outer peripheral portion is formed on the outer periphery of the seedling container 22, and an engaging portion (circular hole) connected to the cylindrical outer peripheral portion in a freely rotatable manner from the outside is provided, thereby forming a plurality of connecting bodies for connecting the two seedling containers 22. The coupling body engagement portion is rotatably connected to the cylindrical outer peripheral portion of the seedling container 22, and the adjacent seedling containers 22 are rotatably coupled with the cylindrical outer peripheral portion serving as a rotation axis, so that the plurality of seedling containers 22 are coupled to each other. That is, the seedling container 22 and the coupling member are coupled like a chain loop.

Accordingly, the seedling receiving bodies 22 do not change the interval between the adjacent seedling receiving bodies 22 regardless of whether the linear portions 28 that move linearly or the arc-shaped portions 29 that move in an arc shape, and therefore, at the positions where seedlings are supplied from the seedling receiving bodies 22 to the left and right planting hoppers 20a, 20b, positional deviation with respect to the left and right planting hoppers 20a, 20b of the seedling receiving bodies 22 is less likely to occur, seedling supply is appropriately performed, and seedling planting accuracy is improved.

The moving mechanism 23 of the seedling feeder 43 winds the seedling containers 22 connected to each other like a chain loop around the arc-shaped cutouts provided on the outer peripheries of the left and right sprockets, and the left and right sprockets are driven to rotate by the power output from the transmission case 26, thereby circulating the respective seedling containers 22.

The revolving movement path around which the seedling container 22 circulates is an elongated circle having a straight portion 28 extending in the left-right direction in plan view and an arc-shaped portion 29 curved in an arc shape from the straight portion 28 to the front side or the rear side by a sprocket, and is disposed inside the left-right width of the left and right rear wheels 44.

The left and right planting hoppers 20a and 20b are disposed on the rear side of the machine body with respect to the rear wheel axle 12.

The seedling feeder 43 is configured to feed seedlings while revolving around the seedling container 22 in accordance with the left and right planting hoppers 20a and 20 b.

The planting hoppers 20a and 20b drop and feed the seedlings from the seedling container 22 at the first drop and feed position 31a and the second drop and feed position 31b, respectively.

Further, seedling receivers 22 for receiving the seedlings to be dropped and supplied are provided corresponding to the left and right planting hoppers 20a, 20b, respectively, and the bottom cover is opened only when the seedlings arrive above the left and right planting hoppers 20a, 20b corresponding to the seedling receivers 22, and is not opened above the non-corresponding left and right planting hoppers 20a, 20 b.

That is, only when the seedling receiver 22 corresponding to the planting hopper 20a comes to the first drop-and-feed position 31a, and only when the seedling receiver 22 corresponding to the planting hopper 20b comes to the second drop-and-feed position 31b, the bottom cover of each is opened to feed the seedling to the corresponding planting hopper 20a, 20 b.

The first drop-feed position 31a and the second drop-feed position 31b can be moved to corresponding positions when adjusting the line interval between the left and right planting hoppers 20a, 20 b.

The operation cycle of the moving mechanism 23 is synchronized with the operation cycle of the lifting mechanism 21, and the seedling containers 22 corresponding to the left and right planting hoppers 20a, 20b are used as one seedling container unit, and a plurality of the seedling container units are connected, so that the seedling containers 22 are arranged and dropped to the left and right planting hoppers 20a, 20b through the left and right drop-down supply positions 31a, 31b, and seedlings are supplied to the left and right planting hoppers 20a, 20 b.

The transplanter 10 includes a soil rolling wheel 37 for rolling the periphery of the seedlings planted in the left and right planting hoppers 20a and 20b, and the soil rolling wheel 37 rolls the vicinity of the rear of the seedling planting portion of the left and right planting hoppers 20a and 20 b.

Further, a seat 46 is provided on which an operator who supplies seedlings to the seedling feeder 43 sits. Specifically, the seat 46 is disposed rearward at the center of the right and left sides of the body in front of the seedling feeder 43. The operator sitting on the seat 46 sits in a rearward posture toward the front side of the seedling feeder 43, and performs the seedling replenishing operation through the front side of the seedling feeder 43, particularly the front linear portion 28 on the circulating movement path of the seedling container 22.

A preliminary seedling rack 50 for storing seedlings supplied to the seedling supply device 43 is provided at a position above the rear wheel axle 12 in a side view of the machine body on both right and left sides of the seat 46.

The preliminary seedling rack 50 is configured such that a support fixture 52 is provided on an upper portion of a seedling support column 51 projecting to the outside of the body of the traveling vehicle body 40, a seedling carrying swing arm 53 switchable between a swing state and a non-swing state is provided on the support fixture 52, a vertical seedling rack frame 54 is disposed at an interval on the seedling carrying swing arm 53, and one end portion of a mounting table 55 for mounting a container such as a seedling box or a seedling tray for accommodating a seedling for replenishment is attached to the same surface of the seedling rack frame 54.

The mounting table 55 may be provided only one in the vertical direction, or may be arranged in plural at intervals in the vertical direction that do not affect the removal of the container.

The preliminary seedling racks 50 are provided on both left and right sides of the traveling vehicle body 40, respectively, and the seedling carrying swing arms 53 are swung on the support fixtures 52 in accordance with the state.

For example, in the planting work of seedlings, the longitudinal direction of the platform 55 is oriented in the front-rear direction of the machine body, so that it is easy to take out a container for seedling emergence from the platform 55 and return an empty container, thereby improving the work efficiency.

Since the placement tables 55 are positioned on the left and right sides of the traveling vehicle body 40, the operator can easily grasp the end portions of the portion of the traveling vehicle body 40 that can be placed thereon, and can prevent the feet from slipping off the traveling vehicle body 40 and collapsing in posture.

When the operator rides on or off the traveling vehicle body 40, the seedling support turning arm 53 is turned by about 90 degrees.

This forms a space for the passenger compartment on both the left and right sides of the traveling vehicle body 40.

Further, the operator can also get on and off the traveling vehicle body 40 from the front side of the machine body, and if the seedling raising swing arm 53 is swung so that the seedling frame 54 is positioned on the front side of the machine body and the mounting table 55 is positioned on the rear side of the machine body, the operator can use the seedling frame 54 as a handrail, so that the operator can smoothly get on and off the traveling vehicle body 40.

Further, when the container for seedlings is placed on or taken out from the table 55, there is no member that obstructs the placement and taking out of the container on the rear side of the machine body, so that the work efficiency is improved.

The seat 46 is mounted to the traveling vehicle body 40 in an コ -shaped manner in front or rear view, and is mounted to an upper portion of a portion in the left-right direction of the body in a seat frame 49 of the body cover 48 that covers the engine 41 and the like. The lower end portions of the left and right sides of the seat frame 49 are connected to a frame (not shown) of a slide portion that moves the left and right travel transmission boxes 38 in the left-right direction to change the left-right spacing of the left and right rear wheels 44.

Thus, the seat frame 49 also serves as a component of the sliding portion, and therefore, the strength of the sliding portion is improved.