JP2021007322A - Transplanter - Google Patents

Abstract

To provide a transplanter capable of suppressing breakage due to a load on a transmission axle, capable of facilitating getting on/off on a machine body front side regardless of a height of a vehicle, and comprising a scraper device whose position can be easily changed according to adjustment between seedling rows of a seedling planting unit.SOLUTION: A travel unit 44 is provided on a travel vehicle body, a travel transmission unit 38 for transmitting to the travel unit 44 is provided, and a planting unit for planting seedlings to a farm field is provided in a transplanter. The travel unit 44 is attached to the travel transmission unit 38 through an axle 12, a cross sectional shape of the axle 12 is same over a side where the travel unit 44 is attached to a side where the travel transmission unit 38 is attached, and the travel unit 44 is attached to one side of the axle 12, the travel transmission unit 38 is attached to the other side. Between the travel unit 44 and the travel transmission unit 38 of the axle 12, one or a plurality of adjusting members 36 for adjusting a gap between the travel unit 44 and the travel transmission unit 38 are provided in a rotatable manner.SELECTED DRAWING: Figure 24

Description

The present invention relates to a transplanter for transplanting vegetable seedlings such as onions and lettuce into a field.

Conventionally, a transplanter in which traveling wheels are attached to one end of a transmission axle mounted on a traveling transmission case is known (Patent Document 1).

Further, there is known a transplanter in which a worker gets on a work seat provided on a traveling vehicle body, the worker throws seedlings into a seedling supply device, and the thrown seedlings are planted by a seedling planting device (Patent Document). 2).

This transplanter is provided with a floor step for workers to move on the traveling vehicle body, and the front side of the aircraft, which is frequently used for getting on and off, is formed to have a lower vertical height than other parts. As a result, the worker can easily put his / her foot on when getting in and the head becomes small when getting off, so that he / she can get on and off quickly and safely.

Further, there is known a transplanter provided with a scraper device that comes into contact with the inside and outside of a seedling planting device that moves up and down during a planting operation and scrapes off the adhering soil (Patent Document 3).

Japanese Unexamined Patent Publication No. 2010-148378 JP-A-2010-75107 Japanese Unexamined Patent Publication No. 2013-21995

However, in the transplant machine of Patent Document 1, the size of the shaft hole of the transmission wheel inserted into the transmission axle and the shaft hole of the transmission sprocket built in the transmission axle are different, so that the shaft diameter of the transmission axle is the boss. It is necessary to have different shapes on the side to be attached to the shaft hole and the side to be attached to the shaft hole.

As a result, if the load continues to be transmitted from the traveling wheel, there is a problem that damage such as bending or breaking at portions having different shaft diameters is likely to occur.

Further, in the transplanter of Patent Document 2, if the vehicle height is raised according to the height of the ridges, the vertical height on the front side of the floor step also rises relatively, so that the worker raises his / her legs extra. You have to get in and spend extra effort. In addition, since the head becomes large, the worker needs to pay extra attention when getting on and off, which causes a problem that the work efficiency is lowered.

Further, in the transplanter of Patent Document 3, the scraper device is incorporated in the space between the left and right sides of the seedling planting device, that is, the space between the planting rows. Therefore, when changing the space between the planting rows of the seedling planting device, It is necessary to replace the scraper device according to the planting line, or to configure the scraper device so that the line can be adjusted.

Therefore, the man-hours required for inter-row adjustment increase, and the space and clearance required for scraper device replacement or adjustment work must be incorporated into the design, resulting in an increase in the number of parts and manufacturing costs, and complicated configuration. Problems such as reduced maintainability occur.

In consideration of the conventional problems, the present invention is less likely to be damaged by the load of the transmission axle, is easy to get on and off on the front side of the machine regardless of the height of the vehicle, and is adjusted to the inter-row adjustment of the seedling planting device. It is an object of the present invention to provide a transplanter equipped with a scraper device that can be easily repositioned.

In order to solve the above problems, the following technical measures were taken.

According to the first aspect of the present invention, a traveling device (44) is provided on the traveling vehicle body (40), a traveling transmission device (38) is provided on the traveling device (44), and a planting device for planting seedlings in a field ( In the transplant machine provided with 20a, 20b), the traveling device (44) is attached to the traveling transmission device (38) via the axle (12), and the cross-sectional shape of the axle (12) is the traveling device (12). The transplant machine is characterized in that it is the same from the side where the traveling transmission device (38) is mounted to the side where the traveling transmission device (38) is mounted.

According to the second aspect of the present invention, the traveling device (44) is mounted on one side of the axle (12), the traveling transmission device (38) is mounted on the other side, and the traveling device (44) of the axle (12) is mounted. ) And the traveling transmission device (38), one or more adjusting members (36) for adjusting the distance between the traveling device (44) and the traveling transmission device (38) are rotatably mounted. The transplantation machine according to claim 1 is used.

According to the third aspect of the present invention, the traveling vehicle body (40) is provided with a boarding portion (46,122) on which an operator is boarded, and the traveling vehicle body (40) gets on and off the boarding portion (46, 122) on the front side. The boarding / alighting mechanism (173) and the ridge edge detecting device (182) for detecting the arrival at the end of the ridge are provided, and one of the boarding / alighting mechanism (173) and the ridge edge detecting device (182) is provided. The transplant machine according to claim 1 or 2, characterized in that the machine is arranged on one side on the left and right sides of the machine and the other side is placed on the other side on the left and right sides of the machine.

The invention according to claim 4 is provided with a boarding / alighting actuator (250) for moving the boarding / alighting mechanism (173) up and down, and the ridge detecting device (182) reaches the end of the ridge in the boarding / alighting actuator (250). The transplanter according to claim 3, wherein the boarding / alighting mechanism (173) is moved downward when the above is detected.

The invention according to claim 5 is provided with a vertical movement mechanism (21) for raising and lowering the planting device (20a, 20b), and a soil removing device (248) for removing soil adhering to the planting device (20a, 20b). ) Is provided, and in the planting device (20a, 20b), opening / closing arms (230, 230) are rotatably attached to the left and right hopper stays (229, 229), and hoppers are attached to the opening / closing arms (230, 230). The components (231,231) are mounted and configured, and the soil removing device (248) is mounted on the left and right hopper stays (229,229) and connected to the vertical movement mechanism (21) by a linking wire (246). The transplanting machine according to any one of claims 1 to 4, wherein the soil removing device (248) moves in conjunction with the vertical movement of the vertical movement mechanism (21).

According to the invention of claim 1, since a portion that is easily bent when a load is applied to the axle (12) is not formed, it is possible to prevent the axle (12) from being unable to travel due to deformation.

Further, when manufacturing the axle (12), it is not necessary to make the shapes of the side on which the traveling device (44) is mounted and the side on which the traveling transmission device (38) is mounted different, which facilitates processing and improves productivity. To do.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the left-right distance between the traveling device (44) and the traveling transmission device (38) can be adjusted by attaching and detaching the adjusting member (36). Since it can be done, it is possible to easily deal with differences in working conditions such as ridge width.

Further, by rotatably attaching the adjusting member (36) to the axle (12), it is possible to prevent contaminants such as foliage of crops from getting entangled with the axle (12), so that the time required for removing the contaminants is required. And labor is reduced.

Further, since the axle (12) can be prevented from being eroded by the components of the entangled impurities, the durability of the axle (12) is improved.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the boarding / alighting mechanism (173) and the ridge detection device (182) are arranged on different sides of the left and right sides of the machine. It is prevented that the ridge detecting device (182) interferes with getting on and off the vehicle, and the ridge detecting device (182) is prevented from being damaged by contact with an operator.

Further, since the weight bias in the left-right direction of the machine body is suppressed, the running of the traveling vehicle body (40) is stabilized, and the planting posture of the seedlings by the planting device (20a, 20b) is stabilized.

According to the invention of claim 4, in addition to the effect of the invention of claim 3, when the ridge is reached, the boarding / alighting actuator (250) is activated to move the boarding / alighting mechanism (173) downward, so that the aircraft can be turned or the like. It makes it easier for workers to move down from the machine, improving work efficiency.

According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, the soil removing device (248) is attached to the hopper stay (229, 229) of the planting device (20a, 20b). By changing the position and tilting posture of the planting device (20a, 20b), the soil removing device (248) also has the same position and tilting posture. Therefore, the position and tilting posture of the soil removing device (248) No adjustment is required and work efficiency is improved.

Further, since the soil removing device (248) moves in conjunction with the vertical movement mechanism (21), a complicated transmission configuration becomes unnecessary.

Left side view of the transplanter Right side view of the transplanter Rear view of the transplanter Front view of rice transplanter Top view of the transplanter Top view showing the area around the bumper on the front side of the aircraft Side view of the main part showing the periphery of the bumper on the front side of the aircraft Perspective view of the main part showing the periphery of the bumper on the front side of the aircraft Side view showing the elevating mechanism and the inter-row adjustment mechanism of the left and right planting hoppers Top view showing the elevating mechanism and the inter-row adjustment mechanism of the left and right planting hoppers Rear view showing the elevating mechanism and the inter-row adjustment mechanism of the left and right planting hoppers Perspective view showing the elevating mechanism and the inter-row adjustment mechanism of the left and right planting hoppers Rear view showing the main part of the opening and closing mechanism of the planting hopper (A) Rear view of the main part showing the interstitial adjustment plate, (b) Front view of the main part showing the interstitial adjustment plate. (A) Side view of the main part showing the hydraulic cylinder for raising and lowering and the contraction regulation arm, (b) Side view of the main part showing the contraction regulation arm, (c) Rear view of the main part showing the contraction regulation arm. Rear view of the main part showing the lifting hydraulic cylinder and the contraction control arm Side view of the main part of a transplanter equipped with an irrigation pump and a check valve Perspective view of the main part showing the control part, planting device, seedling supply device, etc. at the rear of the machine Perspective view of the main part of the transplanter showing the ridge sensor, boarding step, etc. Side view of the main part showing the boarding / alighting assistance step that moves up and down Front view of the main part showing the boarding / alighting assistance step that moves up and down Front view of the main part showing the boarding / alighting assistance step that automatically descends at the ridge (A) Side view of the main part showing the step of assisting getting on and off that automatically descends at the ridge, and (b) Block diagram showing the operation of the step up / down actuator by the detection of the ridge sensor. Rear view of the main part showing the state where the traveling wheel is attached to the traveling transmission case via the transmission axle. Rear view of the main part showing another example of the state where the traveling wheel is attached to the traveling transmission case via the transmission axle. A perspective view showing a transmission axle having the same cross-sectional shape in the left-right direction. Side view showing a planting hopper with a scraper device and an elevating mechanism Rear view showing a planting hopper with a scraper device attached (A) Plan view of the main part of the scraper device, (b) Plan view of the main part of another configuration example of the scraper device.

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

FIG. 1 is a left side view showing a transplanter 10 for transplanting seedlings as an example of the transplanter according to the embodiment of the present invention, FIG. 2 is a right side view, FIG. 3 is a rear view, and FIG. 4 is a front view. At the same time, FIG. 5 is a plan view.

In the following description, the side where the steering wheel 404 is arranged is the rear side, and the opposite side, that is, the side where the engine 41 is arranged is the front side. Then, the right-hand side is the right and the left-hand side is the left when facing the front side of the aircraft.

As shown in FIGS. 1 to 5, the transplanter 10 of the present embodiment has a traveling vehicle body 40 capable of traveling forward, a steering handle 404 for walking maneuvering provided at the rear of the traveling vehicle body 40, and a field. A planting device 42 for planting seedlings and a seedling supply device 43 for supplying seedlings to the planting device 42 are provided.

The traveling vehicle body 40 is provided with a mission case 39 at the front portion of the machine body, and an engine 41 which is a drive device is provided at the front side of the mission case 39. Axle covers 101 covering the tread-adjustable axles that change the left and right positions of the traveling wheels 44, which are the rear wheels, are connected to the lower rear parts of the fuselage on both the left and right sides of the mission case 39, and the fuselage of the axle cover 101. A traveling transmission case 38 for transmitting a driving force to a traveling wheel 44 provided on the rear side of the machine body is attached to the outer end portion so as to be rotatable up and down.

The left and right traveling wheels 44 are arranged between the traveling transmission case 38 and the left and right sides of the front and rear frames 103, which will be described later, to suppress the left and right width of the airframe. However, if the left and right traveling wheels 44 can be mounted on the outside of the machine body of the traveling transmission case 38 in order to meet the conditions such as the width of the ridges for planting the seedlings, the working conditions that can be handled can be increased. ..

More precisely, the left and right axle covers 101 are rotatably mounted with the internal axle (not shown) as a fulcrum, and the traveling transmission case 38 is mounted on each of these axle covers 101, and the lifting hydraulic cylinder 300 and the like described later are used. The axle cover 101 rotates due to the expansion and contraction of the rolling cylinder 310, so that the traveling transmission case 38 rotates up and down.

Then, as shown in FIGS. 1 to 5 and 18, at least the transmission case 26 is supplied to the transmission case 26 which is transmitted from the mission case 39 to branch and supply the driving force to the planting device 42 and the seedling supply device 43. A base plate 400 that covers the left and right side surfaces and the back surface is provided, and a frame stay 401 is detachably provided at the rear portion of the base plate 400 via a fixing member such as a bolt. Then, the frame stay 401 is provided with a handle frame 402 that projects in a shape that draws an arc toward the upper rear side of the machine body, and the rear portion of the handle frame 402 is used to adjust the vehicle height up and down and transmit running and planting work. In addition to providing a control unit 403 for operating the on / off of the seedlings, a control handle 404 to be gripped when the operator operates the machine body when moving without planting seedlings is provided. The steering handle 404 has a shape that bends in the left-right direction of the airframe and toward the rear of the airframe around the handle frame 402, and on the left and right rear sides, a side clutch operating lever 405 that turns on and off the transmission to the traveling wheel 44. Are provided respectively. Further, a first throttle lever 406 for increasing / decreasing the output of the engine 41 is provided on either the left or right side of the steering wheel 47.

A control panel 47a is provided between the left and right sides of the steering wheel 404, and the control panel 47a is provided with a vehicle height adjusting lever 123 for adjusting the vehicle height of the traveling vehicle body 40 by expanding and contracting the lifting hydraulic cylinder 300, and left and right. The main clutch lever 125 for turning on / off the transmission of the driving force to the traveling transmission case 38 and the transmission case 26, the first engine switch 407 for switching the startability of the engine 41 and performing the stop operation, and the traveling vehicle body 40 for traveling. A main speed change lever 150 is provided to switch the transmission to either moving speed, planting work speed, running neutral or reverse.

When permitting the start of the engine 41, the operator pushes in and rotates the first engine switch 407 to operate the engine 41 in the on position. As a result, when the engine 41 is started, the engine 41 is started. The engine 41 may be started by using a cell starter or a recoil starter. Further, even when the engine is operated by a drive device other than the engine 41, for example, an electric motor, the electric motor is energized and started when the first engine switch 407 is in the ON position.

When the engine 41 is stopped, when the operator lightly pushes the first engine switch 407, the engine 41 is switched to the off position by the force of the built-in torque spring (not shown), whereby the engine 41 is stopped.

Since it is only necessary to lightly push the first engine switch 407 during the off operation, running and planting can be stopped immediately. As a result, the running and planting are stopped immediately when the ridges are reached, so that the planting operation of the seedlings in the non-ridged part is prevented and the extra seedlings consumed are reduced. In addition, when the aircraft is moved to the ridge for the next planting work, no extra movement occurs, so that fuel consumption and working time are reduced.

On the front side of the control handle 47 and above the transmission case 26, a seedling supply device 43 for transporting seedlings to be thrown by an operator to the left and right planting hoppers 20a and 20b, which will be described later, is provided. The strength of the vicinity of the control handle 47 and the seedling supply device 43 is improved and vibration is generated over the rear portion of the seedling supply device 43 and the reinforcing connecting stay 151 provided on the rear upper part of the handle frame 402 and on the front side of the control panel 47a. A reinforcing frame 152 in the front-rear direction is provided to reduce the number.

Then, between the front and rear of the reinforcing frame 152, the rotation support plate 153 having an L-shape in the side view is mounted in a posture of projecting toward the left and right other sides of the machine body (right side of the machine body) in the rear view. The left and right sides of the rotation support plate 153 are open, and the base portion of the visual rotation arm 154 is rotatably mounted on the open side. The visual rotation arm 154 can be rotated on one side of the left and right sides of the machine (on the left side of the machine) until it contacts the handle frame 402, and on the other side of the left and right sides of the machine, it rotates to a position where it contacts the rotation support plate 153. Make it possible. In other words, the rotation support plate 153 has a downward tilting posture in which the seedling supply device 43 and the visual rotation arm 154 are substantially parallel to each other when the visual rotation arm 154 is rotated in the left-right or other side of the machine body. At this position, rotation is restricted by the rotation restricting unit 153a located on the lower side of the machine body.

Below the portion where the visual rotation arm 154 is provided, the vertical movement mechanism 21 on the left and right other sides for raising and lowering the planting hopper 20b on the left and right other sides of the machine body is arranged so as to be vertically rotatable. The visual rotation arm 154 that has been rotated to the left and right sides of the machine until it comes into contact with the regulating portion 153a has an arrangement configuration that is located above the machine body with respect to the vertical movement mechanism 21 that has rotated upward to the maximum extent.

A view of the traveling vehicle body 40 in the traveling direction, that is, the front side of the aircraft is reflected on the end side of the visual recognition rotating arm 154, and the work seat 46 and the floor step 122, which will be described later, are reflected in the traveling vehicle body 40 in the traveling direction. A visual recognition member 155 is rotatably provided so that an operator who is boarding with his / her back can see it. More specifically, the visual recognition member 155 has a ball-shaped connecting body (not shown) on the rear side of the machine body, and the ball-shaped connecting body is connected to a connecting hole portion on the visual recognition rotating arm 154 side (not shown). It is configured to be screwed into, rotate and adjust the angle.

If the visual recognition member 155 is a mirror 155a, the scenery on the front side of the machine body can be projected only by mounting the mirror 155a, so that an increase in cost due to mounting can be suppressed. In the field where seedlings are planted, it may be difficult to see due to the reflection of sunlight and surrounding lighting depending on the work time and work place. Therefore, a shade body (not shown) or the like is placed on the upper side of the mirror 155. It should be possible to install it.

As described above, the visual recognition device 157 is configured.

In the above configuration, the visual recognition rotation arm 154 can be rotated in an arc shape in the left-right direction of the machine body around the rotation axis in the front-rear direction, and the left-right position and the vertical height of the visual recognition member 155 can be changed. The work posture of the person, for example, whether to work while sitting on the work seat 46 or standing on the floor step 122, or to make it easier to see the scenery in front of the machine body reflected on the visual recognition member 155 according to the physique of the worker. be able to. As a result, the worker can surely find the approach to the ridge end where the planting work of the seedling is completed and the presence or absence of obstacles in the course, so that the seedling can be planted wastefully in a place other than the ridge. , It is possible to prevent the traveling vehicle body 40 from being damaged by contact with an obstacle.

In addition, the worker needs to turn his back in the direction of travel and put the seedlings into the seedling supply device 43 arranged on the rear side of the machine, but since it is not necessary to look back to see the state of the front side of the machine, the seedlings It is prevented that the supply is interrupted and the planting hoppers 20a and 20b do not plant seedlings in the field, so-called stock shortage occurs.

As a result, the worker does not have to manually plant the seedlings at the place where the stock deficiency occurs, and the labor of the worker is reduced.

Then, when the visual rotation arm 154 is rotated toward the left and right sides of the machine during storage or the like, the visual rotation arm 154 is located inside the machine from the left and right ends of the machine and the left and right width of the machine. Since the configuration is such that it fits inside, the visual recognition device 157 is prevented from being caught and damaged at the storage location.

Further, even when the visual rotation arm 154 is rotated to the maximum extent toward the rotation restricting portion 153a on the left and right sides of the machine when not in use, the visual rotation arm 154 is in an upper position that does not interfere with the vertical movement mechanism 21. Since it is located at, the visual rotation arm 154 is prevented from being damaged by contact with the vertical movement mechanism 21.

Further, since the base side of the visual recognition device 157 is provided between the front and rear of the reinforcing frame 152, the vibration of the machine body is not easily transmitted to the visual recognition device 157, and the scenery reflected on the visual recognition member 155 becomes easy to see.

Further, by connecting the handle frame 402 and the seedling supply device 43 with the reinforcing frame 152, the strength of the machine body can be improved.

The visual rotation arm 154 is attached to the rotation support plate 153 with a double nut to prevent it from coming off or rotating downward due to its own weight, while rotating with a light force during the rotation operation of the operator. On the other hand, the adjustment work is easy and can be done without tools.

A U-shaped bumper support frame 108 is provided on the front side of the machine body and on both the left and right sides of the mission case 39 so as to project toward the front side of the body. Then, in front of the left and right bumper support frames 108, bumpers 109 projecting to the front side of the machine body are provided.

As shown in FIGS. 6 to 8, the bumper 109 includes a bumper plate 109a in which the front side and the left and right sides of the plate body are bent downward, a front weight 109b that can be attached to and detached from the upper surface of the bumper plate 109a, and a bumper plate. It is composed of a bumper rod 109c extending in the left-right direction from 109a. The front weight 109b is made of a mass of a relatively heavy and hard material such as iron, and has a shape protruding toward the front side of the machine body from the bumper plate 109a.

As a result, the front weight 109b, which is a mass having weight and hardness, protrudes most forward of the machine body, so that it is possible to prevent damage to the bumper plate 109a when it comes into contact with an obstacle.

The left and right bumper support frames 108 are formed on the front side of the fuselage and on the lower side of the fuselage with recesses (not shown) having openings on the lower side of the fuselage, and the front beams having the left and right directions of the fuselage in the longitudinal direction are formed in these recesses. Insert the frame 110 and fix it.

By providing the front beam frame 110, the left and right bumper support frames 108 and the mission case 39 can be assembled into a quadrangular frame on the front side of the machine body, so that the strength of the front side of the machine body is improved. In particular, when the bumper 109 comes into contact with an obstacle, the left and right bumper support frames 108 are inserted and fixed to the front beam frame 110, so that damage or impact is less likely to propagate to the rear side of the left and right bumper support frames 108. Become.

Further, when assembling the mission case 39 to the airframe, the recesses of the left and right bumper support frames 108 are inserted into the front beam frame 110 and then moved in the left-right direction to fix the front-rear position of the mission case 39 and then to the left-right position. Is possible, so that the assembly work is prevented from being delayed due to the deviation of the mounting position of the mission case 39.

The rear portion of the engine 41 is loaded on the front side and one side of the left and right sides of the mission case 39, and the front portion of the engine 41 is loaded on an engine mount arranged near the left and right center portions of the front beam frame 110. However, the bumper support frame 108 and the engine 41 on the side where the engine 41 is arranged are arranged so as to be spaced apart in the vertical direction. That is, the bumper support frame 108 is not a member that receives the engine 41 from below.

With the above configuration, it is possible to prevent the impact when the bumper 109 comes into contact with an obstacle from propagating from the bumper support frame 108 to the engine 41, thereby preventing the engine 41 from being damaged or causing malfunction due to the impact. it can.

Further, even if the bumper support frame 108 is deformed by an impact, the load state of the engine 41 is less likely to be affected, and even if the bumper 109 is damaged, the work or movement can be performed by the power of the engine 41.

Then, on the left and right sides of the bumper plate 109a, step support plates 111 having recesses in the left-right direction for mounting the bumper rod 109c are mounted. The left and right step support plates 111 are supported via reinforcing arms 112 provided on the rear side of the body and on both the left and right sides of the front beam frame 110.

The upper surfaces of the left and right step support plates 111 are flat, and on one side of the traveling vehicle body 40 on the left and right sides of the aircraft, that is, on the left side of the aircraft, the front side portion of the front boarding step 113 on which the operator puts his / her foot when getting on and off from the front side of the aircraft. To wear. On the other hand, on the left and right sides of the machine body, that is, on the right side of the machine body, the front-rear distance between the seedlings to be planted by the planting hoppers 20a and 20b, that is, the so-called stock spacing, is set. Form an inter-stock switching cover 114 that supports a planting speed change lever 803 that selects a first planting speed or a second planting speed when the planting speed is operated.

The front boarding step 113 includes a lower footrest portion 113a located on the front side of the aircraft and on the lower side in the vertical direction, and an upper footrest portion 113b located on the rear side of the aircraft and on the upper side in the vertical direction with respect to the lower footrest portion 113a. It is located between the upper and lower parts of the lower footrest portion 113a and the upper footrest portion 113b, and is composed of an intermediate inclined portion 113c that twists and inclines toward the outside of the machine body. A plurality of non-slip protrusions 113d are formed on the surface of the lower footrest portion 113a, and the intermediate inclined portion 113c has an inclination angle that makes it difficult for the operator to psychologically place the foot when getting on and off, and the lower footrest portion 113c. It is defined as the front-rear length that is passed across the 113a and the upper footrest 113b when moving.

On the other hand, the inter-stock switching cover 114 includes a lower base portion 114a located on the front side of the machine body and on the lower side in the vertical direction, and an upper base portion 114b located on the rear side of the machine body and on the upper side in the vertical direction with respect to the lower base portion 114a. , Located between the upper and lower sides of the lower base 114a and the upper base 114b, twisting and tilting toward the outside of the machine, the inter-stock main shift lever 801 and the inter-stock sub-shift lever 802, and the main shift lever 150 move, respectively. It is composed of a lever mounting portion 114c having a moving groove formed therein.

The front boarding step 113 and the inter-stock switching cover 114 may have symmetrical shapes, and the inter-stock switching cover 114 may be provided on one side of the left and right sides of the machine, and the front side boarding step 113 may be provided on the other side of the left and right sides of the machine.

Then, on the rear side of the upper footrest portion 113b and the upper base portion 114b, a worker gets on and off from the side of the machine body, and side step 118s that serve as scaffolding during work are provided. In the side step 118, plate bodies are arranged vertically and horizontally in the frame to form a plurality of space portions, and the soil adhering to the sole of the worker is dropped downward. Further, a central step 119, which serves as a scaffold for the worker to be boarded, is detachably provided between the left and right sides of the left and right side steps 118.

As described above, the floor step 122 is configured.

The front boarding step 113, the inter-stock switching cover 114, the left and right side steps 118, and the center step 119 are mounted independently, that is, they are not fastened together with one mounting member (bolt or the like). As a result, when removing each step structure during partial maintenance work, it is not necessary to remove another step structure, and the efficiency of maintenance work is improved.

A boarding / alighting assist mechanism 170 on which an operator rests his / her feet when getting on / off the front boarding step 113 is attached to the lower part of the front side of the front boarding step 113. The boarding / alighting assistance mechanism 170 has an L-shaped side view, which is located on the outside of the machine body, and has an outer support arm 171 having a first protrusion 171a which protrudes forward of the machine body below the bent portion and inside the machine body. Located over the inner support arm 172, which is L-shaped in front view and has a second protrusion 172a protruding outward from the fuselage below the bent portion, and the first protrusion 171a and the second protrusion 172a. It is composed of the boarding / alighting assistance step 173 provided.

The outer support arm 171 is fastened together with the step support plate 111 with co-tightening bolts 174 ... and mounted on the traveling vehicle body 40. Further, the inner support arm 172 is mounted on the traveling vehicle body 40 together with the bumper plate 109a by being jointly tightened with the joint tightening bolts 174.

As a result, a plurality of members are tightened with the co-tightening bolts 174 ... Therefore, the strength of the traveling vehicle body 40 near the front side of the machine body is improved, and the durability is reduced due to the load when the operator gets on and off. It will be reduced.

Further, by providing the boarding / alighting assistance step 173, even if the vehicle height of the traveling vehicle body 40 is raised according to the height of the ridges and the like, the operator puts his / her foot on the boarding / alighting assistance step 173 and the front boarding step 113 Since the foot can be stepped on the lower footrest 113a to get in and get off by the reverse operation, there is no need to raise the foot high when getting on and off, and there is no need to jump off at all, and the worker's body. The burden on the car is reduced.

Since the boarding / alighting assist step 173 is provided over the first protruding portion 171a and the second protruding portion 172a, the outer support arm 171 and the inner support arm 172 are not located within the left-right width of the boarding / alighting assist step 173. The operator's feet are prevented from coming into contact with the outer support arm 171 and the inner support arm 172.

On the other hand, when the vehicle height of the traveling vehicle body 40 is lowered or during the planting work, not only the boarding / alighting assist mechanism 170 becomes unnecessary, but also the ridges come into contact with the ridges or the slopes of the ridges depending on the vehicle height. There is a risk of breaking and reducing the planting accuracy of seedlings.

In order to prevent this, the bases of the outer support arm 171 and the inner support arm 172 are attached with double nuts (not shown), and the outer support arm 171 and the inner support arm 172 are rotated using the co-tightening bolt 174 ... as a rotation fulcrum. It is preferable to mount the boarding / alighting assisting mechanism 170 so that it can rotate up and down.

With the above configuration, the boarding / alighting assisting mechanism 170 can be rotated upward away from the ridge surface when it is not needed, so that the boarding / alighting assisting mechanism 170 is prevented from breaking the ridges and the seedling planting accuracy is maintained.

Alternatively, instead of the above configuration, as shown in FIGS. 20 and 21, the outer support arm 171 is slidable along the vertical direction of the outer base arm 175 mounted on the traveling vehicle body 40 side and the outer base arm 175. It is composed of an outer sliding arm 176 provided in the above and an outer pulling spring 177 having an urging force to pull the outer sliding arm 176 upward of the machine body, and the vertical length can be changed. Further, an inner base arm 178 for mounting the inner support arm 172 on the traveling vehicle body 40 side, an inner sliding arm 179 slidably provided along the vertical direction of the inner base arm 178, and the inner sliding arm 179. Is configured by an inner pulling spring 180 having an urging force to pull up the machine, and the vertical length can be changed.

The boarding / alighting assist step 173 is provided over the first protruding portion 171a of the outer sliding arm 176 and the second protruding portion 172a of the inner sliding arm 179, and when a load is applied to the boarding / alighting assist step 173, the outer sliding arm 176 and the inner side are provided. The sliding arm 179 moves downward against the urging force of the outer pull-up spring 177 and the inner pull-up spring 180, moves to the boarding / alighting position of the traveling vehicle body 40, and is put into use.

In the above configuration, when the load is not applied to the boarding / alighting assist step 173, the outer sliding arm 176 and the inner sliding arm 179 slide upward due to the urging force of the outer pulling spring 177 and the inner pulling spring 180. Since it is configured to switch to the unused state, a fixing member (not shown) such as a pin for fixing at the used position may be provided.

With the above configuration, especially when boarding the traveling vehicle body 40, when the operator puts his / her weight on the boarding / alighting assistance step 173, he / she can board the front boarding step 113 via the boarding / alighting assistance step 173.

The above-mentioned boarding / alighting assistance step 173 is used when a worker gets on and off the machine body, and as an opportunity for the worker to descend from the machine body to the field during the planting work, the machine body reaches the ridge. In particular, there are many turning operations that push the rear part downward to move to the next work ridge.

Therefore, when the traveling vehicle body 40 reaches the ridge end, if the boarding / alighting assist step 173 is automatically lowered, the operator does not need to move the boarding / alighting assist step 173 downward, and the work efficiency is improved.

In this configuration, as shown in FIGS. 22 and 23 (a) and 23 (b), the step up / down actuator 250 that moves one or both of the outer sliding arm 176 and the inner sliding arm 179 up and down is left and right on the front side of the machine body. The step vertical actuator 250 is provided on one side and is operated for a certain period of time by detecting the ridge end of the ridge end sensor 182.

As a result, when the traveling vehicle body 40 reaches the ridge end, the boarding / alighting assistance step 173 moves downward and is automatically set to a position that facilitates the getting on / off of the operator, so that the work efficiency is improved.

The step up / down actuator 250 may be either an electric motor or an electric cylinder, and it is preferable to select one that is easy to mount on the machine and easy to operate. In the case of an electric motor, as shown in FIG. 22, the pinion gear 250a is rotated, and the pinion gear 250a is engaged with the rack gear 250b provided on the outer sliding arm 176 or the inner sliding arm 179.

Further, the step vertical actuator 250 is assumed to automatically stop when an overload is applied by using a bimetal or the like, and if the step 173 is installed on the ground and further pushed down, the step vertical actuator 250 is automatically stopped. And damage to the surrounding components is prevented.

Depending on the type and area of the crop to be cultivated, the height of the ridges may be low and the boarding / alighting assistance step 173 may not be necessary when getting on and off, but when working under these conditions, the ridge sensor 182 If the function of the boarding / alighting assistance step 173 to be lowered is forgotten due to the detection, the boarding / alighting assistance step 173 may be pressed against the ground and may be deformed or damaged due to the contact load with the ground. Further, even if the boarding / alighting assistance step 173 is lowered due to a malfunction of the ridge sensor 182 during movement outside the field, the same problem may occur. In order to prevent this, it is desirable to have the above configuration in which the step up / down actuator 250 is stopped as soon as an overload is applied.

As shown in FIGS. 1 to 8, the lower part of the inter-stock switching cover 114 rotates downward due to its own weight and comes into contact with the ridge surface, and when the traveling vehicle body 40 reaches the end of the ridge and does not touch the ground, it further rotates downward. A ridge sensor stay 182a is provided to support the ridge sensor 182, which operates and activates a notification device 181 that informs the operator that the field edge has been reached. The notification device 181 is a communication device that notifies a buzzer or a lamp attached to each part of the traveling vehicle body 40, or an information terminal (tablet, smartphone, etc.) of an operator.

In the ridge sensor 182, a sensor arm 183 is rotatably provided, a ridge grounding roller 184 is rotatably attached to the lower portion of the sensor arm 183, and a grounding urging spring 185 for urging the sensor arm 183 downward. At the base of the sensor arm 183, a ridge detection switch 186 that turns on (or turns off) when the angle exceeds a predetermined angle is provided. The grounding urging spring 185 is configured such that the upper end side is attached to the detection adjustment plate 187 whose angle can be adjusted along the elongated hole, and the operating angle can be changed according to the ridge height.

The ridge sensor 182 is brought into contact with the ridge surface by adjusting the vehicle height of the traveling vehicle body 40 at the start of the seedling planting work traveling. By grounding the rotatable ridge surface grounding roller 184, the ridge surface is not easily broken and fine irregularities can be leveled, so that the seedling planting accuracy can be improved.

Then, when the traveling vehicle body 40 continues to move forward and reaches the end of the ridge and the ridge surface grounding roller 184 does not come into contact with the ridge surface, the urging force of the grounding urging spring 185 and the sensor arm 183 and the ridge surface grounding roller Due to the weight of 184, the sensor arm 183 rotates downward, and the ridge detection switch 186 is not pressed. When the ridge detection switch 186 is no longer pressed, the notification device 181 is energized to operate the notification device 181 to notify the operator that the vicinity of the front end of the traveling vehicle body 40 has reached the ridge.

When the ridge sensor 182 detects the ridge, there is still space for planting several plants in the ridge, so the operator does not stop the aircraft immediately, but the remaining planting space. While throwing the number of seedlings to be planted into the seedling supply device 43, the stop operation is prepared.

As a result, the operator can know the approach to the ridge without looking back, so that the aircraft can be stopped at the timing when the seedlings are planted on the ridge, and fuel consumption due to extra running and the next It is prevented that the moving distance to the work line is long.

Further, since the number of seedlings to be put into the seedling supply device 43 can be adjusted when the ridges are approaching, even if the planting hoppers 20a and 20b perform the planting operation due to the delay in stopping the planting work running, the ridges are ridged. It is prevented that seedlings are released to places other than the above.

As shown in FIGS. 4, 6 and 7, the sensor arms 183 are paired left and right sensor arms 183a and 183a, and the ridge surface grounding rollers 184 are rotatably mounted on the left and right ridge surface grounding rollers 184a and 184a, respectively. However, the left and right ridge detection switches 186 and 186 may be provided respectively.

As a result, when either one of the left and right sensor arms 183 and 183 rotates downward and one of the corresponding ridge detection switches 186 and 186 is not pressed, the notification device 181 operates and the ridge ends. Even if the shape is disturbed due to wind and rain, the ridges can be easily detected, and the operator can stop the planting work at the right time.

Further, on both the left and right sides of the traveling vehicle body 40 on the front side of the airframe, and on the front side of the airframe with respect to the traveling wheels 44, the vehicle rolls via a horizontal frame 16 provided on the lower side of the front beam frame 110 and projecting in the left and right direction of the airframe. A front wheel 45 that is movably supported is provided.

Then, the tip of the wheel drive shaft extending outward from the mission case 39 to the left and right sides enters the rotation axis position of the front portion of the traveling transmission case 38, and the traveling unit system shift in the transmission case 39. The power for traveling through the transmission unit is transmitted to the transmission mechanism in the traveling transmission case 38. Then, the power for traveling is transmitted to the transmission axle of the traveling transmission case 38 via the transmission mechanism in the traveling transmission case 38, and the traveling wheels 44 are driven and rotated.

As shown in FIGS. 24 and 25, one left and right side of the transmission axle is pivotally attached to the traveling driven sprocket 38a installed on the rear side of the fuselage of the traveling transmission case 38, and the other left and right sides are equipped with traveling wheels 44. It is inserted into the boss 44a. As a result, the traveling wheel 44 is rotationally driven by the driving force transmitted by the traveling transmission case 38.

The diameter of the mounting hole (not shown) of the traveling driven sprocket 38a to which the transmission axle is attached and the diameter of the mounting boss 44a are the same, and the outer diameter of the transmission axle is the same as these in the left-right direction as shown in FIG. Form with the same diameter. That is, the cross-sectional shape of the transmission axle is the same in the left-right direction.

As a result, the traveling axle is less likely to be vulnerable to the load applied to the transmission axle due to the ground contact of the traveling wheel 44 and contact with unevenness or obstacles in the field, so that the transmission axle is bent or broken. It is prevented that the vehicle cannot run due to slack.

In addition, it is not necessary to form a large-diameter portion or a small-diameter portion on the transmission axle, and basically the same material can be integrally formed, so that processing is easy and the productivity of parts is improved.

The shape of the transmission axle may be a cylinder, but it may also be a polygonal shape such as a hexagonal shaft, which is more likely to resist bending force.

Then, as shown in FIG. 24, a collar 36 having a diameter slightly larger than that of the transmission axle is rotatably mounted between the left and right sides of the traveling wheel 44 and the traveling transmission device 38 and on the outer circumference of the transmission axle. The collar 36 has a circular inner peripheral shape regardless of the shape of the transmission axle, and prevents the collar 36 from engaging with the transmission axle and stopping rotation. On the other hand, the outer peripheral shape may be polygonal instead of circular.

The collar 36 is attached to the rotating transmission axle for the purpose of preventing impurities such as foliage of crops cultivated in the field from being entangled with the rotating axle, so that the width of the left and right sides is wide. The length is substantially the same as between the left and right sides of the wheel 44 and the traveling transmission device 38. In other words, by mounting the collars 36 having different left and right widths, the distance at which the traveling wheels 44 are separated from the traveling transmission device 38 is changed.

Alternatively, as shown in FIG. 25, a plurality of collars 36 may be provided between the left and right sides of the traveling wheel 44 and the traveling transmission device 38 to adjust the distance between the left and right sides of the traveling wheel 44 and the traveling transmission device 38.

As shown in FIGS. 24 and 25, the traveling driven sprocket 38a is rotatably mounted inside the traveling transmission case 38 via a bearing 38b, and the transmission axle penetrates the traveling driven sprocket 38a in the left-right direction. Let me put it on. Then, the end portion of the transmission axle on the traveling transmission device 38 side penetrates the wall surface inside the machine body of the traveling transmission case 38, and is mounted by the washer 35 and the bolt 34.

With the above configuration, the transmission axle can be easily removed from the traveling driven sprocket 38a by removing the bolt 34 located outside the traveling transmission case 38. Therefore, the collar 36 can be replaced or increased or decreased to replace the traveling wheel 44 and the traveling transmission case. It becomes possible to easily adjust the left-right spacing of 38.

As a result, work efficiency is improved, and the treads of the left and right traveling wheels 44, 44 can be adjusted to the difference in ridge width for each field or work place, so that the traveling wheels 44, 44 are ridges during planting work, especially ridges. It is prevented from coming into contact with the left and right slopes of the tread and collapsing. When the ridges collapse, the roots of the planted seedlings are exposed to the outside, which may cause poor growth or death due to the influence of the outside air, and may be damaged by birds and beasts and insects. By preventing, the occurrence of these problems is prevented.

In addition, by attaching the collar 36 to the transmission axle so that it can rotate, even if impurities such as long foliage that were dropped in the field during the previous harvesting work try to get entangled with the transmission axle, they will fall again due to rotation. , Or it can be wrapped around the collar 36. As a result, it is possible to prevent impurities from being entangled with the transmission axle, so that it is not necessary to remove the entangled impurities from the transmission axle, and labor can be reduced.

In addition to this, it is possible to prevent water and chemical components exuding from impurities from adhering to the transmission axle and reducing the durability of the transmission axle due to erosion.

The outer peripheral surface of the collar 36 is made smooth so that it can be easily separated even if impurities are entangled, or the surface is coated with a material that inhibits entanglement to improve the above effect. Further, it is desirable that the collar 36 or the surface coating material has high corrosion resistance to the chemical components of the plant.

The left and right side clutches (not shown) provided in the mission case 39 can cut off the drive of each of the left and right traveling wheels 44. Therefore, when the airframe is turned, the side clutch is used to bring the left and right traveling wheels 44, which are inside the turn, into a non-driving state so that the machine can turn smoothly.

Further, the traveling transmission case 38 is connected to a driving means that rotates up and down to move the traveling wheel 44 up and down with the front side of the traveling transmission case 38 as a rotation fulcrum. Specifically, an arm 13 extending upward is integrally attached to a mounting portion of the traveling transmission case 38 to the mission case 39, and the lifting hydraulic cylinder 300 in which the arm 13 is fixed to the mission case 39. It is connected to the left and right sides of the connecting body attached to the tip of the piston rod. One left and right side (right side) is connected by a connecting rod, and the other side (left side) is connected by a left and right horizontal control hydraulic cylinder that can be expanded and contracted according to the inclination of the machine body.

When the lifting hydraulic cylinder 300 operates and its piston rod protrudes to the rear of the machine body, the left and right arms 13 rotate backward, and the traveling transmission case 38 rotates downward accordingly, and the machine body rises. On the contrary, when the piston rod of the lifting hydraulic cylinder 300 moves to the front of the machine body and retracts into the cylinder, the left and right arms 13 rotate forward, and the traveling transmission case 38 rotates upward accordingly. The aircraft descends.

The lifting hydraulic cylinder 300 is operated by a ridge surface sensor 14 that touches the ridge surface and operates as the vertical distance between the machine body and the ridge surface fluctuates. The operation of the ridge surface sensor 14 is an operation of detecting the height of the upper surface of the ridge based on the position of the machine body, and the height of the machine body is set according to the height of the upper surface of the ridge based on the detection operation of the ridge surface sensor 14. The structure is such that the lifting hydraulic cylinder 300 operates.

When the left-right horizontal control hydraulic cylinder expands and contracts, the left arm 13 connected to the left-right horizontal control hydraulic cylinder rotates to move only the left traveling wheel 44 up and down to tilt the machine left and right. .. The left-right horizontal control hydraulic cylinder is configured to operate based on the detection result of a sensor that detects the left-right inclination of the machine with respect to the left-right horizontal to make the machine horizontal.

The lifting hydraulic cylinder 300 expands and contracts by detection by the ridge sensor 14 or by operating a vehicle height adjusting lever 123 provided at the rear of the machine body to change the vehicle height. However, if the vehicle is stopped for a long time, the load due to the weight of the machine body is applied to the elevating hydraulic cylinder 300, and the hydraulic oil naturally leaks, so that the elevating hydraulic cylinder 300 contracts and the vehicle height becomes low. Sometimes.

In particular, if the vehicle height is lowered during storage in a warehouse or the like where the aircraft is stopped for a long period of time, the lower ends of the ridge sensor 14 and the planting hoppers 20a and 20b may come into contact with the floor surface and be deformed. , There is a risk of damaging the floor surface. In addition, after a long break due to meals or the like, it may be necessary to readjust the vehicle height, which may reduce work efficiency or cause uneven planting depth due to adjustment mistakes.

As shown in FIGS. 15 and 16, the lifting hydraulic cylinder 300 includes a fixed cylinder case 301, a hydraulic balance 303 that is installed in the fixed cylinder case 301 and slides, and supports an end of a sliding rod 302. The sliding rod 302 is composed of a spring 304 that biases the sliding rod 302 on the extension side, that is, in a direction that raises the vehicle height of the traveling vehicle body 40, and an arc-shaped spring cap 305 that regulates extension is provided at one end of the spring 304. Provide.

Then, on the upper side of the hydraulic balance 303, a contraction regulating arm 306 that can be switched between a regulated state and a non-regulated state by a rotation operation is rotatably provided, and when the contraction regulating arm 306 rotates to the regulated state side. The end of the shrinkage control arm 306 comes into contact between the front and rear of the fixed cylinder case 301 and the hydraulic balance 303, so that the sliding rod 302 cannot physically move in the contraction direction.

As shown in, the contraction regulation arm 306 is attached to the hydraulic balance 303 via a torque spring 307 on the base side, and is in contact with the end side so as to cover the outer circumference of the sliding rod 302 with the fixed cylinder case 301. A regulation spacer 308 that enters between the front and rear of the hydraulic balance 303 and a regulation holder 309 that engages with the outer peripheral surface of the fixed cylinder case 301 in front of the spring 304 are provided.

As shown in FIG. 15 (c), the regulation spacer 308 has a U-shape when viewed from the front so as to surely contact the outer circumference of the spare sliding rod 302, and the regulation holder 309 is attached to the fixed cylinder case 301. It is assumed that an arc-shaped notch is formed so as to mesh with each other. Further, the contact surfaces of the regulation spacer 308 and the regulation holder 309 may be coated with a soft material such as rubber in order to prevent the lifting hydraulic cylinder 300 from being damaged.

The torque spring 307 urges the contraction regulating arm 306 to the non-regulated state side, and contracts to a position where the regulated spacer 308 and the regulated holder 309 completely retract from the expansion / contraction range of the lifting hydraulic cylinder 300 in the non-regulated state. The regulation arm 306 is configured to rotate.

Switching between the regulated state and the non-regulated state of the contraction regulating arm 306 may be performed from above the floor step 122 of the traveling vehicle body 40 by providing a dedicated manual operation lever, but the lifting hydraulic cylinder 300 is the traveling vehicle body 40. Since it is located near the center of the aircraft in the front-rear direction, it is necessary to project the manual operation lever from the upper surface of the floor step 122. If the manual operation lever protrudes from the floor step 122, it may hinder the movement of the operator, and the operator's feet come into contact with each other to unintentionally switch between the regulated state and the unregulated state, resulting in ridges. Even if the surface sensor 14 detects that the field height has become low, the lifting hydraulic cylinder 300 cannot contract, and the planting depth may become shallow.

Further, since it is necessary to operate the manual operation lever on the traveling vehicle body 40 after adjusting the vehicle height, the work man-hours will increase.

In order to prevent the occurrence of these problems, the switching operation of the contraction control arm 306 is performed by expanding and contracting the lifting hydraulic cylinder 300 provided on the control panel 47a at the left and right center of the control handle 47 of the traveling vehicle body 40. A linking wire 124 is provided on the vehicle height adjusting lever 123 for adjusting the vehicle height of the vehicle body 40, and the operation is performed in conjunction with the operation of the vehicle height adjusting lever 123.

The vehicle height adjusting lever 123 has a "high" position for raising the vehicle height on the front side of the machine body and a "low" position for lowering the vehicle height on the rear side of the machine body, and moves up and down from the "low" position toward the outside of the machine body. It has a "fixed" position to stop the expansion and contraction of the hydraulic cylinder 300 and maintain the vehicle height. When the vehicle height adjusting lever 123 is operated in the "fixed" position, the linking wire 124 rotates the contraction regulating arm 306 toward the regulated state side. On the other hand, when the vehicle height adjusting lever 123 is moved from the "fixed" position and the linking wire 124 is loosened, the contraction regulating arm 306 is rotated to the non-regulated state side by the urging force of the torque spring 307.

With the above configuration, when the contraction regulating arm 306 is operated in the regulated state, the regulating spacer 308 enters between the front and rear of the fixed cylinder case 301 and the hydraulic balance 303, and the lifting hydraulic cylinder 300 cannot contract. The drop in vehicle height due to its own weight is prevented.

As a result, the work of readjusting the vehicle height becomes unnecessary, the work efficiency is improved, and the planting hoppers 20a and 20b and the ridge sensor 14 are prevented from being pressed against the floor surface and deformed.

Further, when the regulation holder 309 bites into the fixed cylinder case 301, it is possible to prevent the contact position of the contraction regulation arm 306 from shifting and the elevating hydraulic cylinder 300 from being maintained in a contractable state.

Further, since the contraction regulating arm 306 is switched between the regulated state and the non-regulated state in conjunction with the operation of the vehicle height adjusting lever 123 at the rear of the traveling vehicle body 40, it is not necessary to separately provide an operating member for the contraction regulating arm 306. The number will be reduced.

Alternatively, since the operating member of the contraction regulating arm 306 does not protrude from the upper surface of the floor step 122 and the regulated state and the non-regulated state are prevented from being unintentionally switched, the planting is performed according to the unevenness of the ridge surface. Seedlings can be planted at a depth.

Further, since the linking wire 124 has a configuration in which the contraction regulating arm 306 is switched only to the regulated state side, when the linking wire 124 is broken or damaged such as excessively extending and bending, the torque spring 307 Since the contraction regulating arm 306 is rotated to the non-regulated state side by the urging force, it is not necessary to rotate the contraction regulating arm 306 sandwiched between the fixed cylinder case 301 and the hydraulic balance 303 at the time of repair. The labor required for the work can be reduced.

In the above configuration, the contraction regulating arm 306 is rotated in the regulated state by the linking wire 124 and rotated in the non-regulated state by the torque spring 307, but is rotated in the regulated state by the torque spring 307 and is rotated in the regulated state by the torque spring 307. It may be configured to rotate in an unregulated state.

Specifically, when the vehicle height adjusting lever 123 is in the "high" position or the "low" position, the linking wire 124 rotates the contraction regulating arm 306 to the non-regulated state side and operates it in the "fixed" position. Then, the linking wire 124 is loosened, and the contraction regulating arm 306 is configured to rotate to the regulated state side by the urging force of the torque spring 307.

In the above configuration, when the linking wire 124 is loosened by operating the vehicle height adjusting lever 123 to the "fixed" position, the contraction regulating arm 306 is immediately rotated to the regulated state side by the urging force of the torque spring 307, so that the vehicle height is adjusted. Since the amount of contraction of the lifting hydraulic cylinder 300 due to the operation of the lever 123 can be suppressed to a smaller size, the vehicle height can be maintained more reliably.

As shown in FIGS. 1, 2 and 5, the horizontal frame 16 is rotatably mounted on the front beam frame 110 at the center of the axis in the front-rear direction, and is mounted on both left and right sides of the horizontal frame 16. , A vertical frame 17 that is long vertically is attached. The left and right front wheels 45 are rotatably attached to the front wheel axle 18 fixed to the lower end side of the vertical frame 17. Therefore, the left and right front wheels 45 are movable around the axis in the front-rear direction at the center of the left and right sides of the airframe. Further, the vertical frame 17 is provided so as to be vertically adjustable with respect to the left and right side portions of the horizontal frame 16, so that the height of the front wheel 45 can be adjusted.

The steering handle 47 is provided at the rear of the fuselage, and is located on the rear side of the fuselage with respect to the transmission axle of the traveling wheel 44. Specifically, it is attached to the rear end of the airframe frame 19 whose front end is fixed to the mission case 39.

The airframe frame 19 extends rearward at the center of the left and right sides of the airframe, and extends diagonally rearward and upward from the front-rear intermediate portion.

The steering handle 47 extends rearward to the left and right from the rear end of the fuselage frame 19, and each rear end thereof serves as a grip portion of the steering handle 47.

Although the grip portion is divided into left and right in FIG. 2, the left and right rear end portions of the steering handle 47 may be connected to each other on the left and right, and the connected portion may be used as the grip portion.

The planting device 42 raises and lowers a plurality of beak-shaped planting tools whose tips point downward, and a position where the lower end of the planting tool is above the field scene and a position below the field scene. The vertical movement mechanism 21 to move, the closed state where the lower end of the beak-shaped planting tool is closed and the seedlings can be received from above and the seedlings can be stored inside, and the lower end of the planting tool opens to the left and right to be stored inside. It is equipped with an opening / closing mechanism that opens and closes the planting tool in an open state that allows the seedlings to be released downward.

As shown in FIGS. 1 to 5, the planting device 42 of the present embodiment has a two-row planting configuration in which the first planting hopper 20a and the second planting hopper 20b are arranged side by side. The first planting hopper 20a and the second planting hopper 20b are respectively mounted on the vertical movement mechanisms 21 provided on both the left and right sides of the transmission case 26 transmitted from the mission case 39.

As shown in FIGS. 9 to 14, the vertical movement mechanism 21 is composed of a pair of upper and lower link arms 21a and 21b, and the upper and lower link arms 21a and 21b move up and down on the front end side of the transmission case 26. Each is rotatably mounted, and the rear end side is rotatably mounted between the left and right link holders 210 and 210. The front end of the upper link arm 21a is provided at a position separated from the rotation axis of the non-circular cam 211 rotatably mounted on the transmission case 26 toward the outer peripheral edge side, and the planting hopper 20a is moved up and down by the vertical movement mechanism 21. , 20b is configured to swing from front to back.

The transmission case 26 is fixed to the upper part of the mounting member whose lower part is fixed to the airframe frame 19. Further, the rear end side of the planting hoppers 20a and 20b and the vertical movement mechanism 21 are located on the rear side of the machine body with respect to the rear end parts of the left and right traveling wheels 44 and 44 in a side view, and are located on the outer side of each machine body. Is a space without other members.

In particular, the position where the front end portion of the upper link arm 21a is attached to the non-circular cam 211 is the position where the planting hopper 20a, 20b is located in the static trajectory of the planting hoppers 20a, 20b from the time when the seedling is received until the bottom dead center is reached. 20b is set to a position where the posture changes from the backward leaning posture to a posture substantially perpendicular to the field scene, and when the posture starts to rise from the bottom dead center, the posture changes from the vertical posture to the forward leaning posture.

As a result, in the movement locus of the planting hoppers 20a and 20b, the time and distance for entering the soil for planting seedlings can be shortened, so that the size of the planting holes formed by the planting hoppers 20a and 20b in the field can be reduced. Since it is kept small, it is possible to prevent the seedlings from falling and disturbing the planting posture.

Further, since the planting hoppers 20a and 20b are in a posture of being greatly tilted forward near the top dead center, the seedlings to be thrown by the operator are transported to a predetermined position and planted at the drop supply position of the seedling supply device 43. Since the upper ends of the hoppers 20a and 20b can be brought close to each other, seedlings are not supplied into the planting hoppers 20a and 20b, and stock shortages are prevented.

Then, since the planting hoppers 20a and 20b are in an inclined posture when the seedlings are dropped and supplied, the seedlings that have entered the planting hoppers 20a and 20b are slid and moved from the upper side to the lower side. Therefore, the seedlings stay in the planting hoppers 20a and 20b, and even if the planting hoppers 20a and 20b enter the soil, the seedlings are not planted and the stock shortage is prevented.

An adjustment plate 212 having a plurality of adjustment elongated holes 212a ... on an arc is arranged between the non-circular cam 211 and the upper link arm 21a, and a fixing member such as a bolt is inserted into the adjustment elongated holes 212a. By changing the position, the planting hoppers 20a and 20b intended by the operator can be adjusted to the front-rear tilt angle.

As a result, the anteroposterior tilt angle of the planting hoppers 20a and 20b can be appropriately adjusted according to the working conditions such as the length and planting depth of the seedlings, so that the seedlings can be planted in a posture and planting depth suitable for growth. , The growth of seedlings becomes good.

The elevating drive force of the vertical movement mechanism 21 is transmitted from the elevating drive shaft 213 provided on the rear side of the machine body with respect to the rotation shaft of the non-circular cam 211. An unequal circular elevating cam 214 is mounted on the elevating drive shaft 213, and an elevating crank 215 for vertically rotating the upper link arm 21a is provided between the elevating cam 214 and the upper link arm 21a. The lower link arm 21b rotates up and down in conjunction with the vertical rotation of the upper link arm 21a, and the vertical movement mechanism 21 is a parallel link.

One end of the elevating crank 215 is attached to a rotating shaft from the elevating cam 214 to the outside of the machine body, and the other end is attached to a connecting plate 216 provided inside the machine body of the upper link arm 21a, and the loci of the planting hoppers 20a and 20b. Is suitable for planting seedlings and receiving seedlings from the seedling supply device 43.

The connecting plate 216 is projected from the upper link arm 21a toward the lower side of the machine body, and the lower end portion is arranged so as to be slightly above the upper end portion or the upper end portion of the lower link arm 21b, and the lower end portion of the connecting plate 216 is arranged. The other end of the elevating crank 215 is mounted near the portion.

With the above configuration, the elevating crank 215 can be arranged closer to the lower part of the machine body, so that the center of gravity is closer to the lower part of the machine body, so that the machine body is less likely to tilt back and forth due to the weight of the members, etc., and the planting depth and planting posture of the seedlings are adjusted. Stabilize.

Further, by mounting the other end of the elevating crank 215 on the connecting plate 216, the upper link arm 21a is configured not to receive a direct load from the elevating crank 215, so that the durability of the upper link arm 21a can be improved. ..

As described above, since the load applied by the elevating operation is small, the upper and lower link arms 21a and 21b may be formed of a square pipe having a hollow inside. If the upper and lower link arms 21a and 21b are lightweight, the load transmitted to the transmission case 26 through the elevating crank 215 and the elevating cam 214 is reduced, so that the durability of the transmission case 26 is also improved.

In addition, the ascending speed does not become too slow or the descending speed does not become too fast due to the weight, the ascending / descending locus of the planting hoppers 20a and 20b is stable, and the planting posture and planting depth of the seedlings are stable. Growth becomes good.

Further, by arranging the elevating cam 214, the elevating crank 215, and the connecting plate 216 between the transmission case 26 and the vertical movement mechanism 21, the upper and lower link arms 21a and 21b do not interfere with each other during the vertical rotation. Both the upper and lower link arms 21a and 21b can be made linear, which makes it possible to simplify the configuration and maintain the strength.

In order to make the raising and lowering and tilting of the planting hoppers 20a and 20b more suitable for planting seedlings, the front-back lengths of the upper link arm 21a and the lower link arm 21b are different. In this case, the upper link arm 21a is shorter than the lower link arm 21b.

As described above, the rear ends of the upper and lower link arms 21a and 21b are mounted between the left and right of the left and right link holders 210 and 210 with a vertical interval. At this time, the mounting position of the upper link arm 21a is set to the lower side. It is positioned on the front side of the machine body from the mounting position of the link arm 21b.

As a result, when the planting hoppers 20a and 20b rise near top dead center, the distance between the fulcrums on the rear end side of the upper and lower link arms 21a and 21b becomes longer, and the amount of forward and backward swing of the planting hoppers 20a and 20b Since the amount of seedlings can be kept small, the amount of the front-rear position on the upper side of the planting hoppers 20a and 20b is unlikely to change near the drop supply position of the seedling supply device 43, and the failure to receive the seedlings is reduced.

When the planting hoppers 20a and 20b rise near the bottom dead center, the distance between the fulcrums on the rear end side of the upper and lower link arms 21a and 21b becomes shorter, and the amount of forward and backward swing of the planting hoppers 20a and 20b increases. Since the size is increased, the planting hoppers 20a and 20b can be changed from the backward leaning posture to the forward leaning posture, and the planting hoppers 20a and 20b are prevented from coming into contact with the seedlings and being knocked down or damaged.

At the front end of the lower link arm 21b, an opening / closing arm 218 having an opening / closing wire 220 for operating an opening / closing mechanism for opening / closing the planting hoppers 20a and 20b according to the elevating position is attached to the upper end side so as to be rotatable back and forth. Attach to. A contact roller 219 is provided on the upper rear side of the opening / closing arm 218 to come into contact with the non-circular cam 211 when a portion having a diameter equal to or larger than a certain value passes through.

When the non-circular cam 211 comes into contact, the opening / closing arm 218 rotates forward and pulls the opening / closing wire 220 to close the planting hoppers 20a and 20b. When the non-circular cam 211 does not come into contact, the opening / closing arm 218 rotates backward. The planting hoppers 20a and 20b are opened by moving and loosening the opening / closing wire 220.

The planting hoppers 20a and 20b open during the period when the seedlings are planted and start to rise from the middle of the descent, and close when the seedlings are planted and start to rise and then the seedlings are received and descend again. The shapes of the non-circular cams 211 correspond.

Notches 221 are formed on the rear sides of the left and right hopper holders 210 and 210 in a U-shape that opens to the rear side of the machine body. It is assumed that the structure of the hopper holder 210 projects to the rear of the machine body at the upper part and the lower part of the notch portion 221.

Then, at the rear portions of the left and right hopper holders 210 and 210, U-shaped interstitial adjustment plates 222 shown in FIGS. 10 to 14 in which the front side of the machine body opens in a side view are provided. Left and right cut grooves 222b ... Are formed in the upper and lower front protrusions 222a of the inter-strip adjustment plate 222 with substantially the same left and right spacing as the left and right hopper holders 210 and 210, and the cut grooves 222b are formed. ... Insert into the hopper holders 210 and 210, respectively. At this time, a quadrangular adjustment space portion 223 is formed between the notch portion 221 and the front and rear of the interstitial adjustment plate 222 in a side view.

The interstitial adjustment plate 222 has a central portion on the left and right located behind the upper and lower link arms 21a and 21b constituting the vertical movement mechanism 21, and protrudes in the left-right direction to substantially the same length, and is located at the rear of the machine body. On the wall surface of the above, interstitial adjustment elongated holes 224 are formed in the left-right direction.

A hopper holder 225 that supports the planting hoppers 20a and 20b on the rear side of the machine body is provided at the rear portion of the inter-row adjustment plate 222. The hopper holder 225 is bent toward the front side of the machine body in an L shape to form a connecting portion 225a, and on both left and right sides, planting hoppers 20a and 20b and fastening members 209 such as bolts are provided so as to project toward the rear side of the machine body. The connecting portions 225b and 225b that are connected via each other are formed. Further, a plurality of mounting holes (not shown) for fastening members 209 such as bolts are formed in one or left and right directions on the wall surface in the vertical direction below the connecting portions 225a and above the connecting portions 225b and 225b. In the hopper holder 225, the L-shaped connecting portion 225a is aligned with the upper side and the rear side of the inter-row adjustment plate 222 in a side view, and the inter-row adjustment elongated hole 224 and the mounting hole are located at the same vertical height. Installing. As a result, when the fastening member 209 is removed or loosened, the hopper holder 225 can slide in the left-right direction along the interstitial adjustment plate 222.

When adjusting the left and right planting intervals of the left and right planting hoppers 20a and 20b, that is, the inter-row spacing, remove or loosen the fastening member 209 as described above, and move the hopper holder 225 to any width within the inter-row adjustment plate 222. It is determined by moving to the position of and attaching or tightening the fastening member 209.

The fastening member 209 is inserted through the mounting hole of the hopper holder 225, and is screwed into or pulled out from the nut provided on the adjustment space portion 223 side so that the position can be switched between the fixed position state and the inter-row adjustment state.

In the above configuration, since the fastening member 209 is inserted in the interstitial adjustment elongated hole 224, the fastening member 209 serves as a stopper and the hopper holder 225 can be prevented from falling off from the left and right ends of the interstitial adjustment plate 222.

In the inter-row adjustment configuration of this case, which includes the left and right planting hoppers 20a and 20b, the inter-rows of the left and right planting hoppers 20a and 20b are the most interstitial because the left and right inter-row adjustment plates 222 and 222 can have a large left-right spacing. Even when the hopper holders 225 and 225 are narrowed, that is, when the inter-row adjustment plates 222 and 222 are moved to the inner ends of the machine body, the left and right planting hoppers 20a and 20b are arranged so as not to interfere with each other. As a result, the space between the rows can be set narrower, so that it is possible to handle a wider variety of working conditions than before.

Further, by providing the inter-row adjustment plate 222 at the rear of the vertical movement mechanism 21, it is possible to prevent the inter-row adjustment plate 222 from hindering the left-right movement of the planting hoppers 20a and 20b, so that the left and right of the inter-row adjustment plate 222 can be prevented. It is possible to set the inter-row spacing in a wider range over the width, and it is possible to correspond to a wider variety of working conditions.

Further, by forming the adjustment space portion 223 between the front and rear of the link holders 210 and 210 and the opening of the inter-strip adjustment plate 222, the operator can work on the rear side of the left and right traveling wheels 44 and 44 and on the outside of the machine body. Since the work of tightening and loosening the nut can be performed in the space of the space, the inter-row adjustment work can be performed efficiently.

Assuming that the thickness of the nut is less than half the front-rear width of the adjustment space portion 223, a work space for inserting a tool for attaching / detaching the nut into the left-right center portion of the inter-strip adjustment plate 222, that is, behind the upper and lower link arms 21a and 21b. Is secured, so that the positions where the planting hoppers 20a and 20b cannot be fixed do not occur within the left and right widths of the inter-row adjustment plate 222, and the necessary inter-row setting becomes possible.

In the above interstitial adjustment mechanism, the left and right planting hoppers 20a and 20b are basically moved in symmetrical directions. For example, when the inter-row spacing is 70 cm, the left and right planting hoppers 20a and 20b are moved to the left and right outer ends of the inter-row adjustment plates 222 and 222, respectively, and when the inter-row spacing is 30 cm, the left and right planting hoppers are planted. The hoppers 20a and 20b are moved to the left and right inner ends of the interstitial adjustment plates 222 and 222, respectively. Other inter-rows are set by moving them to arbitrary positions within the left and right widths of the inter-row adjustment plates 222 and 222, but the operator should be able to visually understand how many cm the inter-rows are set. , Indicators may be provided on the interstitial adjustment plates 222, 222. This indicator shall be affixed with a printed sticker, written on or engraved on the interstitial adjustment plate 222.

However, depending on the type of crop and the field environment, it is possible to plant more than two rows, for example four rows, in a wide ridge. When four rows are planted by reciprocating one ridge, both the left and right planting hoppers 20a and 20b are placed on the left and right sides of the inter-row adjustment plates 222 and 222 so that the planting position is offset to the left and right sides in the direction of travel of the ridges. It is possible to plant seedlings even if they are brought close to. This makes it possible to handle even more diverse working conditions.

The planting hoppers 20a and 20b cover the hopper cover 226 above the hopper holder 225 toward the rear side of the machine body, and cut out the upper surfaces on the rear side of the machine body and on both the left and right sides to form an open space portion. Left and right rotation support shafts 227 and 227 are provided between the front and rear walls of the hopper holder 225 on the rear side and the wall surface on the rear side of the hopper cover 226, respectively, and the rotation support shafts 227 and 227 are provided with rotation arms, respectively. The 228 and 228 are rotatably mounted. Most of the left and right rotating arms 228 and 228 project upward from the open space portion.

The left and right rotary support shafts 227 and 227 are arranged below the notch 221 of the link holders 210 and 210 and the interstitial adjustment plate 222.

As a result, the rotary support shafts 227 and 227 on the hopper holder 225 side can be arranged on the lower side of the interstitial adjustment plate 222 and without a large front-rear distance from the link holders 210 and 210. Therefore, the planting hoppers 20a and 20b can be arranged. The front-rear position does not move too far behind, and a compact configuration can be achieved.

Of the rotating arms 228 and 228, the cable outer of the opening / closing wire 220 is attached to the outside of the machine body, the cable inner is connected to the inside of the machine body, and the left and right rotating arms 228 are pulled and loosened by the opening / closing wire 220. The configuration is such that the 228 rotates.

Further, on the left and right rotation support shafts 227 and 227, U-shaped opening / closing arms 230 and 230, which mount a pair of left and right hopper stays 229 and 229 on the lower side, are mounted so as to be rotatable left and right, respectively. The opening / closing arms 230, 230 have a shape that covers the front and rear and the upper side of the hopper stays 229, 229, and as shown in FIG. 13, a gear in which irregularities in the left and right directions alternately mesh with each other on the upper side of the front and rear surfaces. The portions 230a and 230a are formed, respectively. By engaging the gear portions 230a and 230a, the amount of rotation of the opening and closing arms 230 and 230 at the time of opening and closing is synchronized, and the opening degree is such that the seedlings can be opened evenly from the planting hoppers 20a and 20b.

Further, support pins 232 and 232 are provided on the left and right sides of the front and rear surfaces of the opening / closing arms 230 and 230, respectively, and the left and right opening / closing arms 230 and 230 are brought close to each other on the left and right support pins 232 and 232. Spring 233 for urging in the direction is arranged in the front and rear respectively.

Further, in the hopper stays 229 and 229, the front and rear bent portions are connected to the front and rear portions of the opening and closing arms 230 and 230, and a pair of left and right hopper constituents 231 and 231 are attached to the inner portions of each machine body at the bottom in the front and rear direction. A semi-circular notch (not shown) is formed. The left and right hopper configurations 231,231 are configured such that when they are opened, they open wider in the left-right direction toward the lower end side, and when they are closed, their end faces are in contact with each other substantially evenly. Further, the vicinity of the lower end portion of the hopper components 231 and 231 is formed in a plate shape so as to reduce the resistance when entering the soil.

Further, the hopper cover 226 is formed with an opening (not shown) having a diameter substantially the same as or slightly smaller than the uppermost portion of the left and right hopper constituents 231,231, and the seedling supply device 43 supplies the opening to the opening. The seedling guide 234 that guides the seedlings to the inside of the left and right hopper components 231,231 is inserted and attached. The diameter of the left and right hopper components 231 and 231 near the upper end is larger than the diameter from the vicinity of the upper end to the lower side.

Of the seedling guides 234, the lower side of the hopper cover 226 has substantially the same diameter, and the upper side of the hopper cover 226 has a larger diameter toward the upper side of the machine body, and has a tapered shape in side view and rear view.

Since the upper end side of the seedling guide 234 has a tapered shape, the diameter on the upper end side is maximized, so that the seedlings can be received even if the position where the seedlings are dropped and supplied is slightly deviated, and the planting hoppers 20a and 20b are seedlings. It is prevented from failing to plant.

Further, by making the diameter of the lower part of the seedling guide 234 substantially the same as the diameter of the upper end portion of the hopper constituents 231 and 231 or slightly smaller in diameter, the diameter between the seedling guide 234 and the hopper constituents 231,231 is set. Since there are no gaps, the seedlings can be taken over reliably and the seedlings can be planted reliably.

The left and right planting hoppers 20a and 20b enter into the ridges, that is, the soil when planting seedlings, and open to the left and right to open the seedlings held inside to the soil. In addition, since the seedlings planted by the transplanter of this case are raised so as to sow seeds in a medium to form a root pot, there is soil around the roots of the seedlings.

Therefore, soil basically adheres to the inside and outside of the planting hoppers 20a and 20b where the planting work is performed, although it depends on the soil quality of the field. When soil accumulates inside the planting hoppers 20a and 20b, the holding space for the seedlings is narrowed, and when the seedlings are held, the seedlings are held above the lower end of the planting hoppers 20a and 20b, and the seedlings are planted. The depth may be shallow, or the planting posture may be inclined. When the soil accumulates further, the seedlings stick to the soil, and even if the planting hoppers 20a and 20b enter the soil and become open, the seedlings are not released, the seedlings are not planted in that place, and the worker It may be necessary to manually replant the seedlings.

On the other hand, if soil accumulates outside the planting hoppers 20a and 20b, the diameter of the planting holes formed in the ridges at the time of planting the seedlings becomes large, and the planted seedlings tend to fall down and may be in an inclined posture. .. Further, when soil adheres and the weight increases, the vertical movement mechanism 21 that raises and lowers the planting hoppers 20a and 20b slightly slows the rise and the descends slightly faster, and the planting position of the seedlings is different from the setting. May become.

In order to prevent this, it is necessary to provide a scraper member that contacts the inside and outside of the planting hoppers 20a and 20b to remove soil, but the planting hoppers 20a and 20b of this case can be adjusted in the left-right direction as described above. It is necessary to move the scraper member according to the change of the left and right positions of the planting hoppers 20a and 20b. Not only that, a mechanism for moving the scraper member up and down so as to move the planting hoppers 20a and 20b up and down and to bring the scraper member into contact with the inside and outside of the planting hoppers 20a and 20b without hindering the planting of seedlings is also required.

However, in the present configuration provided with the left-right position adjusting mechanism of the planting hoppers 20a and 20b, the space for incorporating the left-right position adjusting mechanism and the elevating movement mechanism of the scraper member having a complicated structure is scarce. In addition, problems such as an increase in weight and manufacturing cost due to an increase in the number of parts and a decrease in maintainability due to a complicated structure also occur.

A configuration in which the scraper member is mounted while preventing the above-mentioned problems from occurring will be described. In this case, the left and right planting hoppers 20a and 20b are provided, but here, the one mounted on the left and right planting hoppers 20a of the machine body is shown as an example. Those attached to the planting hoppers 20b on the left and right sides have the same configuration and have the same effect.

As shown in FIGS. 27 and 28, the scraper cam stay 235 is attached to the hopper stay 229 on the left and right sides of the machine body (inside the machine body) toward the rear side of the machine body. Further, the upper part of the scraper cam stay 235 has a shape protruding upward on the rear side of the machine body, a cam acting part 236 toward the lower part of the machine body is formed on the lower part on the front side, and a mounting support part 237 is formed on the lower part on the rear side. .. Between the front and rear of the cam acting portion 236 and the mounting support portion 237, an interval portion having a shape similar to a parallelogram (unequal side quadrangle) is formed in a side view.

Of the above-mentioned spacing portions, the space between the upper and lower sides of the cam acting portion 236 on the rear side of the machine body is the acting region 235a in which the scraper device 248, which will be described later, contacts the planting hopper 20a and scrapes off the soil adhering to the inside and outside in the vertical direction. , The front and rear of the upper end of the cam acting portion 236 and the upper end of the mounting support portion 237 are in the direction in which the scraper device 248 approaches the planting hopper 20a, that is, the moving region 235b in which the scraper device 248 is moved from the rear side of the machine to the front side of the machine. Is.

A return protrusion 236a is formed at the lower end of the cam acting portion 236 toward the lower rear side of the machine body.

Then, the base side of the swing arm 238 is rotatably mounted on the lower side of the left and right side (outside of the machine body) of the mounting support portion 237, and the end side of the swing arm 238 is rearward and upward of the machine body. The base side of the roller arm 239, which is shaped like a side view, is rotatably attached to one side of the upper end of the swing arm 238 on the left and right sides of the corpse.

A contact roller 240 that is rotatably attached to the cam acting portion 236 of the scraper cam stay 235 is rotatably attached to the upper part of the machine body at the bent portion of the roller arm 239 and on the left and right other sides of the machine body. The scraper arm 241 supporting the inner scraper 242 for removing the soil adhering to the inside of the planting hopper 20a is mounted, BR>, and the scraper arm 241 toward the lower front side of the machine body. The inner scraper 242 is mounted from the lower end of the scraper arm 241 toward the upper front side of the machine body.

As shown in FIGS. 29 (a) and 29 (b), the scraper arm 241 has an L-shape when viewed from the rear, and the inner scraper 242 is formed on a mounting projection 242 a protruding upward from the left-right portion of the scraper arm 241 on the front side of the machine body. , A diamond-shaped or elliptical inner scraper plate 243 is attached via a fixing member such as a pin.

Further, the bent portions of the scraper arm 241 located on the left and right sides of the machine body and the left and right side ends of the machine body are outside in contact with the outer peripheral portions of the pair of left and right hopper components 231 and 231 constituting the planting hopper 20a. The outer support arms 245 and 245, which support the scraper plates 244 and 244, respectively, are rotatably mounted in the left-right direction. The outer scraper plates 244 and 244 shall be mounted from the lower side of the machine body via a fixing member such as a pin.

The outer support arms 245 and 245 are urged by a torque spring (not shown) in a direction in which they rotate toward the planting hopper 20a, and when they come into contact with the planting hopper 20a, they are expanded and when they are separated, they return to their original positions. It is configured.

Further, as shown in FIGS. 29A and 29B, the outer scraper plates 244 and 244 are trapezoidal in a plan view, and the short side is arranged so as to face the planting hopper 20a side.

Then, in the side view, the outer scraper plates 244 and 244 are assumed to protrude toward the front side of the machine body with respect to the inner scraper 242. This is set by the front-rear length of the outer support arms 245 and 245.

The inner scraper plate 243 and the outer scraper plates 244 and 244 are made of a soft elastic material such as rubber or synthetic resin so that they can be elastically deformed so that they can come into contact with the planting hopper 20a and the planting hopper 20a. Since the contact range can be expanded in the vertical direction by the elastic deformation at the time of separation from the above, it becomes possible to remove a wider range of soil.

Further, the hopper components 231 and 231 are less likely to be worn, and the durability of the hopper components 231 and 231 is improved.

The inner scraper plate 243 and the outer scraper plates 244 and 244, which are made of a soft material, are easily worn by contact with soil and hopper constituents 231,231, but they are attached by a fixing member such as a pin. It can be easily replaced.

As shown in FIG. 27, at one end of the swing arm 238 on the left and right sides of the machine body, the swing arm 238 is rotated back and forth in conjunction with the vertical movement of the vertical movement device 21, and the roller arm 239 is rotated vertically. At the same time, the contact roller 240 is moved along the cam acting portion 236 to move the scraper arm 241 and the inner scraper plate 243 and the outer scraper plates 244 and 244 are attached to one side end of the linking wire 246 to move the soil. doing.

The other end of the linking wire 246 is located at a position closer to the front side of the machine body from the front-rear center of the lower link arm 21b that rotates up and down in conjunction with the vertical rotation of the upper link arm 21a. Install with the aircraft facing up and down. Further, the cable outer 246a of the linking wire 246 is mounted on the left and right sides of the scraper cam stay 235 and on the upper front side.

The upper end portion of the scraper cam stay 235 forms a bent portion toward the left and right other sides of the machine body in rear view, and the scraper extends over this bent portion and the fulcrum portion of the contact roller 240 on the left and right other sides of the machine body. A pulling spring 247 is provided to urge the roller arm 239 equipped with the arm 241 to the scraper cam stay 235 side.

As a result, the scraper device 248 is configured to scrape off the soil adhering to the inside and outside of the planting hopper 20a in conjunction with the vertical movement of the vertical movement device 21.

When the lower link arm 21b rotates upward in conjunction with the upward rotation of the upper link arm 21a due to the operation of the vertical movement device 21, the cooperation wire 246 is pulled and the swing arm 238 rotates to the front side of the machine body. Let me. The contact roller 240, which is urged toward the moving region 235b of the scraper cam stay 235 by the urging force of the pulling spring 247, moves while rotating, so that the roller arm 239 and the scraper arm 241 move downward and on the front side of the machine body. And move. At this time, the left and right hopper components 231 and 231 constituting the planting hopper 20a are in a state of being separated from the ridges by planting seedlings and rising, so that they are in an open state, that is, in a state of being separated from each other.

Then, when the contact roller 240 moves to the front end of the moving region 235b, the inner scraper 242 enters the left and right spacing portions on the rear side of the hopper constituents 231 and 231 which have begun to close to receive the next seedling, and the hopper constituent The outer scraper plates 244 and 244 come into contact with the outer peripheral surfaces of 231 and 231. At this time, the left and right outer support arms 245 and 245 rotate along the outer circumference of the hopper components 231,231 against the urging force of the torque spring, so that soil is removed from the rear side of the machine body to the left and right side surfaces of the machine body. Will be.

Then, the contact roller 240 crosses the moving region 235b and enters the working region 235a, and moves from the upper side to the lower side of the aircraft along the working region 235a. At this time, the inner scraper 242 comes into contact with the inner side surfaces of the hopper components 231 and 231 that close in conjunction with the ascent, and scrapes off the soil adhering to the inside downward. Since the inner scraper plate 243 has a rhombic or elliptical shape and is made of a soft member, the hopper constructs 231 and 231 have a shape close to a semi-elliptical shape, in other words, a planting having a shape close to an elliptical shape. It comes into contact with the inner peripheral surface of the hopper 20a and can scrape off the soil while elastically deforming.

Further, the left and right outer scraper plates 244 and 244 are kept in contact with each other according to the outer peripheral diameters of the hopper constituents 231,231 by rotating the outer support arms 245 and 245, and are placed on the outer surface in the vertical direction. Remove the attached soil. The left and right outer scraper plates 244 and 244 are trapezoidal and elastically deformable with a soft member, so that when they come into contact with the outer peripheral surfaces of the hopper components 231,231 from the side, the front and rear hypotenuse portions Also comes into contact with the rear side of the machine body and the front side of the machine body of the hopper components 231 and 231 to obtain the action of removing a wider range of soil. Further, the outer scraper plates 244 and 244 elastically deformed by being pressed against the outer peripheral surfaces of the hopper components 231 and 231 can be more reliably repelled by the returning force when elastically returning due to a change in diameter. The soil can be removed.

The pulling spring 247 is extended in the vertical direction by moving the contact roller 240 in the vertical direction in the working region 235a, and the force pressing against the scraper cam stay 235 is weakened, so that the scraper arm 241 Hold the posture.

Then, near the lower part of the working area 235a, the hopper components 231 and 231 are separated from the inner scraper 242 and the left and right outer scraper plates 244 and 244 before the hopper components 231 and 231 are completely closed. After that, the contact roller 240 comes into contact with the return protrusion 236a of the working area 235a and is moved downward on the rear side of the machine body, so that the extended pulling spring 247 contracts by crossing the fulcrum, and the contact roller 240 moves. The area 235b is moved to the starting position, that is, the rear side position of the machine body, and the scraper device 248 is returned to the standby position.

At this time, the linking wire 246 is still pulled, but when the upper link arm 21a starts to rotate downward and the lower link arm 21b rotates downward in conjunction with it, it loosens, so that the swing arm 238 rotates slightly toward the front side of the machine body. Even if it is moving, it does not approach the planting hopper 20a where the scraper device 248 accommodates the seedlings and begins to descend by rotating to the rear side of the machine body as it loosens.

With the above configuration, the scraper devices 248 and 248 are attached to the constituent members of the planting hoppers 20a and 20b, so that the scraper can be adjusted by changing the left and right positions of the planting hoppers 20a and 20b to adjust the gap between the planting strips. Since it is not necessary to adjust the left and right positions of the devices 248 and 248, the work efficiency is improved.

In addition, since it is not necessary to configure and install the left-right position adjustment mechanism of the scraper devices 248 and 248, it is possible to prevent an increase in the weight of the machine and the manufacturing cost due to an increase in the number of parts, and the configuration is simplified and maintainability is improved. improves.

Further, by linking the forward / backward movement and the vertical movement of the scraper devices 248 and 248 to the vertical rotation of the vertical movement device 21, the vertical movement mechanism of the scraper devices 248 and 248 is configured and does not need to be mounted. The increase in the weight of the machine and the manufacturing cost due to the increase in the number of parts are prevented, the configuration is simplified, and the maintainability is improved.

Further, by projecting the outer scraper plates 244 and 244 to the front side of the machine body from the inner scraper 242, the outer scraper plates 244 and 244 precede the hopper components 231 and 231 as the scraper devices 248 and 248 move back and forth and up and down. Therefore, it is possible to expand the range of action of soil removal not only on the left and right side surfaces of the hopper constituents 231 and 231 but also on the front and rear surfaces of the hopper.

Each seedling container 22 has a tubular body that opens up and down and a bottom lid that opens and closes an opening on the lower side of the tubular body, and is connected to each other in a loop.

The moving mechanism 23 is a state in which each of the connected seedling accommodating bodies 22 passes in the upper vicinity of the left and right planting hoppers 20a and 20b, and the connected seedlings are formed by a long circular loop-shaped locus in the plan view of the machine body. The accommodating body 22 is rotated counterclockwise.

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

In the present embodiment, a cylindrical outer peripheral portion is formed on the outer periphery of the seedling accommodating body 22, and an engaging portion (round hole) rotatably connected from the outside is provided on the outer peripheral portion of the cylinder to provide two seedling accommodating bodies 22. A plurality of connecting bodies for connecting the above were formed. Then, the engaging portion of the connecting body is rotatably connected to the outer peripheral portion of the cylinder of the seedling containing body 22, and the adjacent seedling containing body 22 is rotatably connected with the outer peripheral portion of the cylinder as the rotation axis. , A plurality of seedling accommodating bodies 22 are connected to each other. That is, the seedling accommodating body 22 and the connecting body are connected like an endless chain.

As a result, the distance between the seedling container 22 and the adjacent seedling container 22 does not change in both the linear portion 28 that moves linearly and the arc-shaped portion 29 that moves in an arc shape. At the place where the seedlings are supplied to the planting hoppers 20a and 20b, the position shift based on the left and right planting hoppers 20a and 20b of the seedling container 22 is less likely to occur, and the seedlings are properly supplied and the seedlings are appropriate. Can be planted.

The moving mechanism 23 of the seedling supply device 43 winds the seedling accommodating bodies 22 connected to each other like an endless chain around the arcuate notches on the outer periphery of the sprockets provided on the left and right, and takes out the left and right sprockets from the transmission case 26. Each seedling accommodating body 22 is configured to rotate around the circumference by driving and rotating with the power.

The orbital movement path around which the seedling container 22 orbits is a length including a linear portion 28 extending in the left-right direction in a plan view and an arc-shaped portion 29 that bends in an arc shape from the linear portion 28 to the front side or the rear side by a sprocket. It has a circular shape and is arranged inside the machine body from the left and right traveling wheels 44.

The seedling storage body 22 of the seedling supply device 43 moves in a predetermined direction relatively stably in the linear portion 28, but the distance between the seedling storage bodies 22 is narrowed or widened in the arc-shaped portions 29 on both the left and right sides. This may cause damage to the drive of the seedling supply device 43, or may cause the seedling drop supply timing to become unstable. In order to prevent this, star wheels 240 and 240 that are driven and rotated are provided on the inner peripheral edges of the plurality of seedling accommodating bodies 22 and on the left and right outer portions of the seedling supply device 43, respectively. Protrusions are formed at equal intervals on the outer peripheral edge of the 240. By allowing these protrusions to enter the interval portion of the seedling container 22, the position of each seedling container 22 when passing through the arcuate portions 29 on both the left and right sides of the seedling supply device 43 is maintained, thereby overloading. The occurrence of seedlings and the deviation of the timing of dropping and supplying seedlings are prevented.

The worker sits on the work seat 46 or stands on the floor step 122 to supply the seedlings to the seedling supply device 43, but when the seedlings for replenishment are exhausted or some problem, for example, the planting posture of the seedlings When abnormalities occur continuously, seedlings cannot be planted, etc., it is necessary to stop the running of the traveling vehicle body 40 and stop the driving of the planting hoppers 20a and 20b. Further, when the traveling speed or the ascending / descending pace of the planting hoppers 20a and 20b is faster than the pace of the worker, it is necessary to reduce the output of the engine 41 and change the speed so that the work can be easily performed.

As shown in FIGS. 4 and 5, the above operation is performed on the front side of the machine body of the seedling supply device 43 and on the left and right side ends so that the above operation can be performed while sitting on the work seat 46 or without getting off the floor step 122. That is, on the right-hand side of the worker seated in the work seat 46, a second engine switch 408 for switching whether the engine 41 can be started or not and for performing a stop operation is provided, and the inside of the machine body (inside the second engine switch 408). A second throttle lever 409 for increasing or decreasing the output of the engine 41 is provided at a position closer to the left and right sides of the machine body so as to be rotatable in the left and right direction of the machine body.

The second engine switch 408 has the same operation method as the first engine switch 407, but the engine 41 must be operated in the on position unless both the first engine switch 407 and the second engine switch 408 are operated. It shall not start.

As a result, when the operator grips the control handle 47 at the rear of the machine body and operates it when moving, the first engine switch 407 can be used to stop the operation, and the worker is on the traveling vehicle body 40 when planting seedlings. At this time, the engine 41 can be stopped by turning off the second engine switch 408, so that it is not necessary to get off the traveling vehicle body 40 and go to turn off the first engine switch 407 during boarding. The operation that causes the problem can be interrupted.

Further, since the second throttle lever 409 can be operated from above the traveling vehicle body 40, it is not necessary to get on and off the traveling vehicle body 40 when increasing or decreasing the output of the engine 41, and the work efficiency and work accuracy are improved.

Further, the left and right planting hoppers 20a and 20b are arranged on the rear side of the position of the transmission axle.

The seedling supply device 43 has a configuration in which the seedling accommodating body 22 orbits around in accordance with the left and right planting hoppers 20a and 20b to supply seedlings.

In the planting hoppers 20a and 20b, seedlings are dropped and supplied from the seedling container 22 at the first drop supply position 31a and the second drop supply position 31b, respectively.

A seedling accommodating body 22 for accommodating seedlings to be dropped and supplied corresponding to the left and right planting hoppers 20a and 20b is separately provided, and above the left and right planting hoppers 20a and 20b corresponding to the seedling accommodating body 22. The bottom lid opens only when it comes, and the bottom lid does not open above the left and right planting hoppers 20a and 20b that do not correspond.

That is, the seedling container 22 corresponding to the planting hopper 20a arrives at the first drop supply position 31a only, and the seedling container 22 corresponding to the planting hopper 20b arrives at the second drop supply position 31b. The bottom lid is opened and seedlings are supplied to the corresponding planting hoppers 20a and 20b.

The first drop supply position 31a and the second drop supply position 31b are configured to be movable to the corresponding positions when the gaps between the left and right planting hoppers 20a and 20b are adjusted.

The operating cycle of the moving mechanism 23 is set to be synchronized with the operating cycle of the vertical moving mechanism 21, and the seedling accommodating bodies 22 corresponding to the left and right planting hoppers 20a and 20b are combined to form one seedling accommodating body unit. By connecting a plurality of the seedling storage units, the seedling storage 22 passes through the left and right drop supply positions 31a and 31b in series, and the seedlings are supplied corresponding to the left and right planting hoppers 20a and 20b. In order to prevent the seedling housing 22 from being supplied with seedlings after passing through the left and right drop supply positions 31a and 31b without causing leakage, the left and right planting hoppers 20a and 20b are fully supplied. The structure is such that seedlings can be supplied accordingly.

In the transplanter 10 of the present embodiment, the soil-covering suppression rings 37 used for soil-covering and suppressing the seedlings planted by the left and right planting hoppers 20a and 20b are used to plant the seedlings of the left and right planting hoppers 20a and 20b. It is provided near each rear left and right side of. The left and right soil-covering suppression rings 37 are formed by bending one rod material into a J-shape in a plan view, and are formed by separately rotating the suppression arms 370 and 370, respectively, and the left and right suppression arms 370 and 370. It is composed of a compression rotating body 371, 371, which is provided on the rear side in a pair of left and right directions so as to be rotatable.

The suppression arm 370 is mounted on the rear side of the traveling vehicle body 40 so as to be vertically rotatable at one end located inside the machine body, and after the rear portion of the straight portion protruding rearward is bent upward. It is bent outward of the fuselage and then bent downward to the front of the fuselage at the same vertical position as the straight part inside the fuselage. Of the left and right compression rotating bodies 371 and 371, the compression rotating body 371 on the outside of the machine body is provided on the straight portion on the outside of the machine body that bends toward the front side of the machine body, and the pressure rotating body 371 on the inside of the machine body is attached to the straight portion on the inside of the machine body. Will be done.

According to the above configuration, an avoidance portion 372 protruding upward from the machine body is formed at the rear portion of the suppression arm 370, and the left and right suppression rotating bodies 371 and 371 are arranged at a left-right interval. As a result, the seedlings planted by the planting hoppers 20a and 20b pass through the left and right spacing portions of the left and right suppression rotating bodies 371 and 371, level the surrounding soil, and pass below the avoidance portion 372. It is prevented that the planting posture is disturbed by being pushed down by the soil covering pressure wheels 37 and 37.

The left and right suppression arms 370 and 370 are respectively mounted so that the left and right positions of the machine body can be adjusted, and the positions of suppression can be changed according to the inter-row settings of the planting hoppers 20a and 20b. In addition, if the left and right positions of the left and right suppression rotating bodies 371 and 371 are also adjustable, the soil around the seedlings after planting can be surely solidified, and the seedlings may grow poorly due to lodging or low temperature. Be prevented.

The transplanter in this case is provided with a work seat 46 on which the worker sits so that the worker who supplies the seedlings can get on the seedling supply device 43 to perform the seedling supply work. Specifically, the work seats 46 are arranged rearward at the center positions on the left and right sides of the machine body, which is the front side of the seedling supply device 43. The worker sitting on the work seat 46 sits in a rearward posture toward the front side of the seedling supply device 43, and has a linear shape on the front side of the seedling supply device 43, particularly on the front side of the orbital movement path of the seedling container 22. Seedling supply work is performed corresponding to the portion 28.

Further, on the left and right other sides of the control panel 47a, a main clutch lever 125 is provided inside the mission case 39 to turn on and off the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26.

In the transplanter of the present invention, the operation of the operator by the control handle 47 at the rear of the machine body is performed at the time of moving to the field, loading / unloading from the transportation means, storing in the warehouse, and turning at the field edge. .. On the other hand, at the time of planting seedlings, the worker is on the work seat 46 of the traveling vehicle body 40, and it is difficult to operate the control handle 47 on the control panel 47a.

Therefore, on the traveling vehicle body 40, an on-vehicle body control unit 126 for a worker who is on the work seat 46 is provided.

As shown in FIGS. 4 and 19, a rear step 127 that inclines upward to the rear side of the machine body is provided in the lower part of the seedling supply device 43, and either the left or right side of the rear step 127, in this case, the right side of the machine body (work seat). As shown in FIGS. 4, 5 and 19, the on-vehicle control unit 126 is provided at the end of the left side with respect to the operator seated on the 46.

The vehicle body control unit 126 is provided with a second vehicle height adjusting lever 128 that adjusts the vehicle height of the traveling vehicle body 40 to adjust the planting depths of the planting hoppers 20a and 20b on the outermost side of the vehicle body. 2 The second main clutch lever 129 is arranged inside the fuselage of the vehicle height adjusting lever 128.

Since it is basically not necessary to fix the vehicle height during the planting of seedlings, the second vehicle height adjusting lever 128 has only the "high" position and the "low" position.

Then, at the outer end of the rear step 127, the vehicle height adjusting lever guide 130, which accommodates the second vehicle height adjusting lever 128 in the frame and forms a display scale indicating a guideline for the vehicle height, is inclined upward toward the front side of the machine body. The vehicle height adjusting lever guide 130 is provided in a posture, and a main clutch lever guide 131 for accommodating the second main clutch lever 129 in the frame is provided in an upwardly inclined posture toward the front side of the vehicle body.

The second vehicle height adjusting lever 128 has a larger amount of protrusion toward the front side of the machine body than the second main clutch lever 129.

Further, the second vehicle height adjusting lever 128 and the second main clutch lever 129 can rotate the base side of the mounting support plate 105 on the left and right sides of the machine body (on the right side of the machine body) and the front and rear beam frames 106f and 106r. If it is to be mounted, it is not necessary to separately provide a mounting member, and the number of parts can be reduced.

Further, side clutch pedals 132L and 132R for turning on and off the left and right side clutches are provided on the left and right sides of the fuselage, that is, on the left side of the fuselage with respect to the on-vehicle control unit 126, exposed on the upper surface of the rear step 127.

The vehicle height adjusting lever guide 130 and the main clutch lever guide 131 are arranged with a constant vertical interval S between the upper surface of the side step 118. The above-mentioned vertical spacing S is set so that a space is secured even if the operator's feet are inserted (eg, about 15 to 20 cm).

With the above configuration, the worker on the floor step 122 and on the work seat 46 can manually operate the planting depth and turn on / off the planting work without getting off the traveling vehicle body 40. , Work efficiency is improved and seedling planting accuracy is improved.

In addition, by arranging the second main clutch lever 129 inside the machine body that is closer to the work seat 46 than the second vehicle height adjustment lever 128, the second main clutch lever 129 is used for replenishing seedlings, correcting the planting state, taking a break, etc. The main clutch lever 129 is easily accessible to the operator, and labor can be reduced.

In particular, when a problem occurs, the seedling planting work can be interrupted promptly, the seedling replanting work becomes unnecessary, and the number of seedlings that are unsuitable for growth and discarded is reduced.

In addition, by projecting the second vehicle height adjustment lever 128 toward the front side of the machine body from the second main clutch lever 129, the arm is greatly extended when operating the second vehicle height adjustment lever 128 on the side far from the work seat 46. There is no need, and the labor of the worker is reduced.

By providing the left and right side clutch pedals 132L and 132R in the rear step 127, which of the side clutch pedals 132L and 132R is used when the traveling direction of the traveling vehicle body 40 is about to deviate from the straight direction with respect to the ridge. By temporarily disengaging the corresponding side clutch by operating the pedal, the course of the traveling vehicle body 40 can be corrected, and the seedling planting position is prevented from meandering in the left-right direction.

Further, the vehicle height adjusting lever guide 130 and the main clutch lever guide 131, that is, the work of getting on the work seat 46 by forming the vertical space S between the upper and lower parts of the vehicle body upper control unit 126 and the side step 118. The movement of the person's legs is not hindered, and the worker can board the cockpit 46 in a comfortable posture, which reduces labor.

Spare seedling frames 50 capable of accommodating seedlings to be supplied to the seedling supply device 43 are provided on both the left and right sides of the work seat 46 at a position above the transmission axle of the traveling wheel 44 when viewed from the side of the machine body.

The spare seedling frame 50 is provided with a support stay 52 on the upper part of a seedling mounting column 51 projecting to the outside of the traveling vehicle body 40, and the supporting stay 52 can be switched between a rotating state and a non-rotating state. An arm 53 is provided, and seedling frame frames 54 and 54 in the vertical direction are arranged at intervals on the seedling mounting rotation arm 53, and seedlings for replenishment are housed on the same surface of the seedling frame frames 54 and 54. One side end of a mounting table 55 on which a container such as a seedling box or a seedling tray is placed is attached.

Only one mounting table 55 may be provided in the vertical direction, but a plurality of mounting tables 55 may be arranged at intervals in the vertical direction so as not to hinder the removal of the container.

The spare seedling frames 50 having the above configuration are provided on the left and right sides of the traveling vehicle body 40, respectively, and the seedling mounting rotation arm 53 is rotated on the support stay 52 according to the situation.

For example, when planting seedlings, the longitudinal direction of the mounting table 55 is directed toward the front and rear of the machine, so that the seedling container can be taken out from the mounting table 55 and the empty container can be easily returned to improve work efficiency. Can be improved.

Further, since the mounting table 55 is located on both the left and right sides of the traveling vehicle body 40 at this position, it becomes easier for the operator to grasp the end portion of the riding vehicle body 40 on which the vehicle can be boarded, and the legs protrude from the traveling vehicle body 40 and the posture is increased. Is prevented from breaking.

Further, when the worker gets on and off the traveling vehicle body 40, the seedling mounting rotation arm 53 is rotated by about 90 degrees.

As a result, space for getting on and off is formed on both the left and right sides of the traveling vehicle body 40.

The operator can also get on and off from the front side of the traveling vehicle body 40, but the seedling frame rotating arm 53 is rotated so that the seedling frame frames 54 and 54 are located on the front side of the machine body, and the mounting table 55 is rear of the machine body. When the state is located on the side, the worker can use the seedling frame frames 54 and 54 as handrails, so that the traveling vehicle body 40 can get on and off smoothly.

Further, when loading or unloading the seedling container on the mounting table 55, there is no member that hinders the loading and unloading of the container from the rear side of the machine body, so that the work efficiency is improved.

The work seat 46 is attached to the traveling vehicle body 40 in a U-shape in front view or rear view, and is a portion of the seat frame 49 straddling the body cover 48 covering the upper part of the engine 41 or the like in the left-right direction of the body. Attach it to the top of the. The bases of the left and right seat stays 49a facing the front side of the machine body are mounted on the upper portion of the seat frame 49, and the work seat 46 is centered on the left and right rotation fulcrum on the base side of the left and right seat stays 49a. It is mounted so that it can rotate in the front-back direction.

As a result, the work seat 46 can be placed in a posture of contacting the vicinity of the front end portion of the seedling supply device 43, so that it is possible to prevent sand and rainwater from adhering to the seated portion of the worker when the work is interrupted.

When transplanting seedlings to a field, so-called irrigation work may be performed in which water is supplied to the vicinity of the planted seedlings in consideration of conditions such as the soil quality of the field, the surrounding water environment, and the weather before the work.

As shown in FIGS. 1 to 4, the transplanter of the present invention is provided with water tank holders 601 for loading the water tanks 600 in the left and right traveling transmission cases 38 and 38, respectively.

The water for irrigation stored in the water tank 600 is pumped up by the operation of the irrigation pump 700 provided at the bottom of the traveling vehicle body 40 and near the center of the front and rear of the machine body, and the planting hoppers 20a and 20b are positioned to plant seedlings. Is discharged to. The irrigation pumps 700 are arranged according to the number of planting hoppers 20a and 20b, and are arranged on the left and right at intervals with reference to the left and right center portions of the traveling vehicle body 40.

A hose may be attached to the irrigation pump 700 to discharge water from the water tank 600 via the irrigation pump 700 and the water from the watering nozzle 710. However, depending on the operation of the piston cylinder (not shown) of the irrigation pump 700. , A part of the water sent out in the discharge direction may be returned to the water tank 600 side. As a result, the amount of irrigation supplied to the field at one time may be reduced, the growth of seedlings may be delayed due to lack of water, or the quality of the harvested product may be deteriorated due to poor growth.

In order to prevent this, check valves 720 that limit the water supply direction to one side are provided at the lower part of the outer side of the left and right side steps 118, respectively, and the water tank 600 and the water supply side of the check valve 720 are connected by a water absorption hose 721. At the same time, the drain side of the check valve 720 and the drain nozzle 710 are connected by a drain hose 722. Further, the check valve 720 and the irrigation pump 700 are connected by a relay hose 723.

More specifically, as shown in FIG. 17, first, the water absorption check valve 724 and the drainage check valve 725 facing in the direction allowing water supply from the front side to the rear side of the machine body are arranged one above the other, and the outer end of the machine body in the side step 118. Attach it to the bottom of the part. Then, one side of the water absorption hose 721 is allowed to enter the water tank 600, the other side is connected to the inlet of the water absorption check valve 724, that is, the front side of the machine body, and one side of the drainage hose 722 is the outlet of the drainage check valve 725. That is, it is connected to the rear side of the machine body, and the other side is connected to the drainage nozzle 710.

The irrigation pump 700 is equipped with the base side of the first relay hose 723a in the left-right direction of the machine body, and the convergence port of the three-pronged branch joint 723d is mounted on the end side. A second relay hose 723b is provided between the water absorption port of the branch joint 723d and the outlet of the water absorption check valve 724 (rear side of the machine body), and the drainage port of the branch joint 723d and the inlet of the drainage check valve 725 (front side of the machine body). ), A third relay hose 723c is provided.

The drainage nozzle 710 may supply water directly to the field, but irrigation is poured into the inside from the upper openings of the planting hoppers 20a and 20b with a certain amount of water force and adheres to the inside of the planting hoppers 20a and 20b. It may be configured to be used for removing the mud.

As a result, the scraper that enters the inside while the planting hoppers 20a and 20b are open and removes mud becomes unnecessary, so that the number of parts can be reduced.

If the scraper draws a predetermined trajectory in conjunction with the elevation of the planting hoppers 20a and 20b, the number of parts of the mechanism for ascending and descending on the predetermined trajectory can be reduced, so that the number of parts can be significantly reduced and the machine structure can be configured. Is simplified.

Further, since the mud can be returned to the field by irrigation, it is possible to prevent the outside of the field from being contaminated with the mud, and the outflow of nutrients in the field is reduced.

With the above configuration, the check valve 720 is arranged in the space on the left and right outside of the machine, so when a problem such as clogging occurs, it is easy to investigate the cause and perform maintenance work, and it is possible to reduce labor and work time. ..

Further, by arranging the water absorption check valve 724 and the drainage check valve 725 to have the same water supply direction, it is difficult to make a mistake in the mounting direction during the assembly work after disassembly, and the work efficiency is improved.

Further, by arranging the check valve 720 on the rear side of the water tank 600, on the front side of the planting hoppers 20a and 20b, and on the outside of the body of the irrigation pump 700, the water absorption hose 721, the drain hose 722, and the first relay hose are arranged. The bending of the 723a, the second relay hose 723b, and the third relay hose 723c can be minimized, and the arrangement can be arranged so as not to overlap.

If the water absorption check valve 724 and the drainage check valve 725 are transparent cylinders, and the internal spring and the ball for preventing backflow can be confirmed from the outside, the water supply direction can be visually recognized and mounting mistakes are less likely to occur.

The transplanter according to the present invention can be applied to improve the ease of getting on and off the transplanter for planting seedlings, and has high industrial applicability.

12 Transmission axle (axle)
20a Planting hopper (planting device)
20b Planting hopper (planting device)
21 Vertical movement mechanism 38 Travel transmission case (travel transmission device)
40 Traveling vehicle body 44 Traveling wheel (traveling device)
46 Work seat (boarding area)
109a Bumper plate (bumper frame)
111 Step support plate (step support frame)
113 Front boarding step (front step)
122 Floor step (boarding area)
173 Boarding / alighting assistance step (boarding / alighting mechanism)
182 Ridge sensor (Ridge detection device)
229 Hopper stay 230 Open / close arm 246 Coordination wire 248 Scraper device (soil removal device)
250-step up / down actuator (boarding / alighting actuator)

Claims (5)

Transplantation provided with a traveling device (44) on the traveling vehicle body (40), a traveling transmission device (38) transmitted to the traveling device (44), and a planting device (20a, 20b) for planting seedlings in a field. In the machine
The traveling device (44) is attached to the traveling transmission device (38) via the axle (12), and the cross-sectional shape of the axle (12) is the traveling transmission device (44) from the side where the traveling device (44) is attached. 38) A transplanter characterized in that it is the same over the side to which it is mounted. A traveling device (44) is mounted on one side of the axle (12), and a traveling transmission device (38) is mounted on the other side.
An adjusting member (36) for adjusting the distance between the traveling device (44) and the traveling transmission device (38) can be rotated between the traveling device (44) and the traveling transmission device (38) on the axle (12). The transplanting machine according to claim 1, wherein one or more of them are mounted. A boarding section (46,122) on which an operator is boarded is provided on the traveling vehicle body (40), and a boarding / alighting mechanism (46,122) used when getting on / off the boarding section (46, 122) is provided on the front side of the traveling vehicle body (40). 173) and a ridge detection device (182) for detecting the arrival at the end of the ridge are provided.
The transplant according to claim 1 or 2, wherein the boarding / alighting mechanism (173) and the ridge detecting device (182) are arranged on one side of the left and right sides of the machine and the other side on the left and right sides of the machine. Machine. An boarding / alighting actuator (250) for moving the boarding / alighting mechanism (173) up and down is provided.
The transplanter according to claim 3, wherein the boarding / alighting actuator (250) moves the boarding / alighting mechanism (173) downward when the ridge detection device (182) detects arrival at the end of the ridge. A vertical movement mechanism (21) for raising and lowering the planting device (20a, 20b) is provided.
A soil removing device (248) for removing soil adhering to the planting device (20a, 20b) is provided.
In the planting device (20a, 20b), an opening / closing arm (230, 230) is rotatably attached to the left and right hopper stays (229, 229), and a hopper structure (231) is attached to the opening / closing arm (230, 230). , 231) is installed and configured,
The soil removing device (248) is attached to the left and right hopper stays (229, 229), is connected to the vertical movement mechanism (21) by a linking wire (246), and is linked to the vertical movement of the vertical movement mechanism (21). The transplanter according to any one of claims 1 to 4, wherein the soil removing device (248) moves.