JP3538584B2 - Lever operation structure of riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lever operating structure of a riding rice transplanter in which a plurality of seedling-specific seedling planting devices are connected to the rear part of a traveling body so as to be able to move up and down, and in particular, a planting lever disposed near a driver's seat. The present invention relates to the structure of levers such as a clutch lever at the edge of a ridge.

[0002]

2. Description of the Related Art A planting lever, which is an example of an operation lever of a riding rice transplanter, is generally protruded from a lateral side of a driver's seat so as to be able to swing back and forth, and a planting operation is performed while raising and lowering a seedling planting device following a rice field. The “planting” position is a mode in which the seedling planting device is lowered toward the rice field.
The position, the `` neutral '' position at which the raising and lowering of the seedling planting device is stopped, the `` elevating '' position at which the seedling planting device is forcibly raised toward the upper limit, and the like are selected. In addition to the above, an "automatic" position and the like are added.

In recent years, in order to reduce the weight of the fuselage, the cover member of the fuselage is often made of resin, and the planting lever also protrudes from a lever guide hole formed in a resin cover. At this time, if the lever guide hole is bent and the operation lever is guided only by the lever guide hole, the operation lever strongly contacts the lever guide hole in the bending operation path and the lever guide hole is damaged or deformed. Or Therefore, when there is a possibility of such a situation, a metal lever guide member is separately installed inside the lever guide hole so that the operation lever does not strongly contact the lever guide hole.

In a stepped operation path or the like in which two linear operation paths along the same direction are connected to each other at an end, during operation on one operation path, the other operation path is overpowered. So that there is no transition to
In some cases, two linear operation paths are connected by a complicated connection path.

Also, in a riding rice transplanter in which a plurality of seedling-specification planting devices are connected to the rear portion of the traveling machine so as to be able to move up and down, a plurality of ridges for suspending the planting operation of some of the planting stripes in the seedling planting device. In addition to being equipped with a clutch, it is provided with a plurality of ridge-side clutch levers for operating these ridge-side clutches separately. The ridge-side clutch levers can be operated from the driver's seat on the rear side of the seedling rest in the seedling planting apparatus. Equipped on the side.

[0006]

A structure in which a metal lever guide member is separately installed and guided inside the lever guide hole is effective in protecting the resin cover portion, but the metal lever guide is effective. Since the guide member is separately prepared and installed, the number of components and the number of assembling steps are increased, which causes a problem that the cost is increased. In particular, when forming a stepped operation path that connects two linear operation paths along the same direction with a complicated connection path, the metal lever guide member itself is also a member having a complicated shape lever guide hole. This will increase costs.

In the structure in which a ridge-side clutch lever is provided on the back side of the seedling rest, if the length of the lever is increased so that it can be easily operated from the driver's seat, it obstructs the raising and lowering of the seedling planting device and the like. If it is shorter, it becomes difficult to operate from the driver's seat.

The present invention has been made by focusing on the actual situation of the lever operating structure of a riding rice transplanter, and a first object is to provide a stepped lever guide hole formed in a resin cover. In the structure to operate the planting lever, without damaging or deforming the cover part,
An object of the present invention is to make it possible to configure an inexpensive lever operation structure with a small number of components.

A second object of the present invention is to enable the clutch lever to be easily operated from the driver's seat at the ridge and to be rationally arranged so as not to obstruct the supply of seedlings and the raising and lowering of the seedling planting device. Is to do.

[0010]

Means for Solving the Problems [Structure, operation and effect of the invention according to claim 1]

(Structure) The invention according to claim 1 is a lever operating structure of a riding rice transplanter in which a plurality of seedling-specific seedling planting devices are connected to a rear portion of a traveling body so as to be able to move up and down, and a lateral side portion of a driving seat. A lever guide hole is formed in the resin cover part arranged in the front and rear direction of the main operation path going in the front-rear direction and the auxiliary operation path going in the front-rear direction, and it can swing back and forth from this lever guide hole. And a planting lever protruding so as to be able to swing from side to side, and can be shifted to the auxiliary operation path by laterally operating the planting lever from one end position of the main operation path that controls the raising and lowering of the seedling planting apparatus and the on / off of the planting clutch. And a restraining portion is formed on a fixed bracket that swingably supports the planting lever, and a contact portion that can contact the restraining portion is connected to the planting lever, When the setting lever is at one end position in the main operation path, the contact portion of the planting lever faces the restraining portion of the bracket, and by moving the setting lever to the auxiliary operation path side at this position, It is characterized in that the contact portion is separated from the restraint portion and the lever operation along the auxiliary operation path is allowed.

(Operation) According to the above configuration, when the planting lever is operated to one end position in the main operation path, the contacting portion of the planting lever contacts the restraining portion of the bracket, and the contacting portion is further moved in the same direction. Operation becomes impossible. Then, by laterally moving the planting lever from the operation position, the contact portion of the planting lever is disengaged from the restraining portion of the bracket, and the lever operation along the auxiliary operation path is allowed.

(Effect) Therefore, according to the first aspect of the present invention, the planting lever can be connected between the main operation path and the auxiliary operation path having a stepped shape without the need for a dedicated metal lever guide for guiding the planting lever. Can be guided between
The lever operation structure that can be operated accurately without damaging or deforming the cover portion provided with the lever guide can be configured inexpensively with a reduced number of parts.

[0014]

1 and 2 show a side view and a plan view of a riding type rice transplanter configured to have a six-row planting specification. This riding type rice transplanter has a six-row planting seedling planting at the rear of a four-wheel drive type traveling body 3 having a pair of left and right steerable front wheels 1 and a pair of left and right non-steerable rear wheels 2. Device 4
Link mechanism 6 driven by hydraulic cylinder 5
It is provided with a basic structure which is connected so as to be able to move up and down freely via the.

A transmission case 8 supporting the front wheels 1 is connected and fixed to a front portion of the body frame 7, and a rear transmission case 9 supporting the rear wheels 2 is supported at a rear portion of the body frame 7 in a freely rolling manner. The engine 11 is mounted on a front frame 10 extending forward from the transmission case 8.
Are mounted and deployed sideways and covered with a hood 12. An upper portion of the body frame 7 is provided with a step 13 extending over the entire length of the body, and a rear portion of the step 13 is curved rearward and upward to form a fender portion 14 extending above the left and right rear wheels 2. In addition, this fender part 1
4 has the strength to withstand the climbing of people,
The upper surface is a non-slip surface. Further, a center cover portion 15 having a smaller width than the fender portion 14 protrudes from a front side of the fender portion 14, and a driver seat 16 having a smaller width than the center cover portion 15 is installed on the center cover portion 15. . And the hood 12
The rear portion is equipped with a steering wheel 17 for steering the front wheels, a main shift lever 18, and the like, and a step portion 13a extending to the left and right sides of the bonnet 12.
However, it is a boarding passage from the front of the fuselage. Further, a stand 19 for the spare seedlings for placing and storing the spare seedlings in a plurality of stages is provided outside these getting-off passages.

As shown in FIG. 3, on the left side of the transmission case 8, a hydrostatic continuously variable transmission (HST) 22 as a main transmission, which is interlocked with the engine 11 via a belt transmission 21, is provided. The transmission output of the hydrostatic continuously variable transmission 22 is branched into a traveling system and a working system in the transmission case 8, and the power of the traveling system is transmitted to a sub-gear transmission mechanism ( (Not shown) and transmitted to the front wheels 1, and the traveling system power shifted by the sub-gear transmission mechanism is transmitted to the main shaft 2 disposed in the lower abdomen of the body.
3 and transmitted to the rear transmission case 9 via the left and right rear wheels 2.
Are driven at a speed synchronized with the front wheels 1. The power of the working system branched in the transmission case 8 is taken out rearward through the planting clutch 24 after being shifted by an inter-gear speed change mechanism (not shown) in the transmission case 8, and is transmitted to the lower abdomen of the machine body. Deployed work transmission shaft 2
5, and transmitted to the seedling planting device 4 via the telescopic transmission shaft 26.

The seedling planting device 4 places the seedlings for six rows and moves the seedling rest 3 which is reciprocated sideways by a set stroke to the left and right.
1. Six sets of rotary planting mechanisms 33 for cutting out seedlings from the lower end of the seedling holder 31 by the planting nails 32 for each plant and planting the seedlings in the field, three leveling floats 34 for leveling the planting locations, etc. It is provided with.

As shown in FIG. 4, a horizontally long planting frame 35 is laid on the seedling planting device 4. Near the center of the planting frame 35, there is a feed receiving work power via a telescopic transmission shaft 26. A case 36 is supported, and three planting cases 37 are connected to the planting frame 35 in a cantilevered rearward direction. Rotating planting mechanisms 33 are provided on the left and right ends of the rear ends of the planting cases 37, respectively.

The feed case 36 includes a screw shaft 38 for driving the seedling rest 31 in a lateral direction, and a seedling feed belt 39 for vertically feeding the seedlings placed on the seedling rest 31 toward a lower take-out portion.
, A vertical feed drive shaft 40 for operating the seedling rest 31 at each horizontal movement stroke end, and the power taken out of the feed case 36 is transmitted to each planting case 37 via the transmission shaft 41. It has become.

At the base of each planting case 37, a torque limiter 42 for preventing an overload from acting on the planting mechanism 33 is provided. At the tip of each planting case 37, the left and right planting mechanisms 33 are provided. A ridge-side clutch 43 for intermittently transmitting power to the vehicle is provided. The ridge-side clutch 43 is used when planting less than all the lines (6 in this case) in the planting process near the ridge. Planting can be suspended.

Each ridge-side clutch 43 is connected via a wire 45 to a ridge-side clutch lever 44 projecting from the driver's seat 16 so as to be able to swing back and forth on the fender portion 14 at the rear end of the fuselage. Have been. The ridge-side clutch lever 44 is connected to the center cover 15.
Within the width of the center cover 15 and near the lateral end of the center cover portion 15, two are disposed on the left side and one is disposed on the right side,
The operator of the driver's seat 16 can easily operate with a slight twist of the body. Here, the ridge-side clutch lever 44 is set to be engaged when operated forward, and to be disengaged when operated backward. Therefore, in the normal state where the planting work is performed in all the rows, all the ridge-side clutch levers 44 approach the rear portion of the center cover portion 15, and the entire upper surface of the fender portion 14 is largely opened, and the vehicle rides on the fender portion 14. The operation of supplying seedlings to the seedling holder 31 can be easily performed. As shown in FIG. 5, the drive unit of the six seedling feed belts 39 provided on the seedling rest 31 is provided with a vertical feed clutch 46 in units of two, and each of the vertical feed clutches 46 is ridged. The seedling feed belt 39 corresponding to the strip that is linked to the row clutch lever 44 via the wire 47 and the row-side clutch 43 is cut off and planted and stopped is also stopped.

The hydraulic cylinder 5 for raising and lowering the seedling planting device 4 is connected to an electromagnetic control valve 50 mounted on the transmission case 8, and operates the electromagnetic control valve 51 based on the driver's artificial command information. The seedling planting apparatus 4 can be raised and lowered arbitrarily by performing the operation, and the electromagnetic control valve 51 is operated and controlled based on the height inspection information with respect to the rice field T of the seedling planting apparatus 4 so that the seedling planting apparatus 4 is moved to the rice field T Is automatically moved up and down, and a configuration for that will be described below.

As shown in FIGS. 7 to 12, sheet metal brackets 51 and 52 are fixed to the right outer surface of the vertical wall frame portion 7a erected at the rear of the body frame 7. An operation plate 53 is rotatably mounted around the horizontal axis a, and a planting lever 54 is attached to a cutout piece 53a projecting outward from the operation plate 53 via a fulcrum shaft portion 54a. The planting lever 54 can swing back and forth around the horizontal axis a with the operation plate 53, and the front and rear axis with respect to the operation plate 53. b, which is supported so as to be able to oscillate laterally and is mounted on the fulcrum shaft portion 54a.
5, the upper main portion of the planting lever 54 is urged to swing rightward and outward around the longitudinal axis b.

As shown in FIG. 7 (b), a lever guide hole 56 is formed in the right side of the center cover portion 15 formed of a resin material. ing. This lever guide hole 56
Is formed by connecting the rear end of the main operation path 56a for artificially raising and lowering the seedling planting device 4 and the front end of the auxiliary operation path 56b for automatic mode setting in a stepped manner,
In the main operation path 56a, from the front end to the rear end, a “planting” position where the seedling planting device 4 is automatically moved up and down, and the seedling planting device 4 is moved down from the air until it comes into contact with the ground to enter an automatic elevating control state. "Position", a "neutral" position at which the raising and lowering operation of the seedling planting device 4 is stopped, and a "elevating" position at which the seedling planting device 4 is raised toward the upper limit, are set in this order, and after the auxiliary operation path 56b. The edge is set to the "auto" position. Then, the detent balls 57 provided on the bracket 52 are selectively elastically engaged with the five detent holes 58 formed on the operation plate 53, so that the planting lever 5
4 is stably held at any of the above-described operation positions.

The bracket 51 is provided with a potentiometer 59 as a sensor for detecting the rotational position of the operating plate 53, that is, the operating position of the planting lever 53 in the front-rear direction. The output from the potentiometer 59 is used as a controller. By inputting to the reference value 60 and comparing it with the reference value, it is configured to detect which of the above five operation positions the planting lever 54 is operated, and actuate the electromagnetic control valve 50 based on the detection result. Control.

An electric motor 61 having a speed reduction mechanism is attached to a support portion 51a cross-linked to the inside of the bracket 51, and an arm 6 which is rotated by an output shaft 61a.
2 and the planting clutch 24 housed in the transmission case 8 at the front of the fuselage are interlockingly connected via a relay link mechanism 63, and when the planting lever 54 is operated to the above-mentioned "planting" position, the planting clutch 24 is turned on, and the planting clutch 24 is turned off at the “down” position, the “neutral” position, and the “up” position.

"Planting", "descending", "neutral", and
The main operation path 56a for selecting each operation position of “up” is
This is an operation route used when performing planting work while operating the planting lever 54, or when raising and lowering the seedling planting apparatus 4 to an arbitrary height during non-working, and by operating the “planting” position. The seedling planting apparatus 4 is automatically controlled to move up and down based on the height detection result with respect to the rice field T, and maintains the seedling planting apparatus 4 at the set height with respect to the rice field T irrespective of the ups and downs of the traveling body 3 and the front-back inclination. It is supposed to be.
That is, among the three leveling floats 34 provided in the seedling planting apparatus 4, the center leveling float 34 is a sensor float S for detecting the height of the seedling planting apparatus 4 with respect to the rice field T.
When the sensor float SF swings up and down around the rear fulcrum c due to a change in the ground pressure, the vertical displacement of the float front portion changes the inner wire 64 of the sensor wire 64 made of a release wire.
The displacement is detected as a.

A sensor lever 65 is mounted on the bracket 51 of the traveling body so as to be rotatable back and forth around a fulcrum d via a support shaft 66, and the support shaft 66 is supported by a support portion 51a.
And is linked to a potentiometer 67 attached to the power supply. Further, the front end of the inner wire 64 a of the sensor wire 64 extending from the seedling planting device 4 to the traveling body is connected to the upper end of the sensor lever 65, and the sensor load is applied across the lower end of the sensor lever 65 and the bracket 51. The setting spring 68 is attached, and the sensor lever 65 is set.
Is rotationally biased in a direction to pull the front end of the inner wire 64a forward. The output of the potentiometer 67 is input to the controller 60, and the operation of the electromagnetic control valve 50 is controlled based on the input information.

Here, when the sensor lever 65 is at a predetermined rotation position, the electromagnetic control valve 50 is set in a neutral position.
A reference signal to be compared with the output signal from the potentiometer 67 is set, the inner wire 64a is pulled, and the sensor lever 65 is moved from a predetermined rotation position to the spring 6 position.
When the output signal from the potentiometer 67 is deviated to one side from the range of the reference signal, the electromagnetic control valve 50 is controlled to move upward, and conversely, the inner wire 64a is loosened. Then, the sensor lever 65 is biased and rotated forward from a predetermined rotation position, and the potentiometer 6 is rotated.
7 is deviated from the range of the reference signal in the reverse direction, based on the comparison and determination result between the output signal from the potentiometer 67 and the reference signal so that the electromagnetic control valve 50 is controlled to operate downward. The operation of the electromagnetic control valve 50 is controlled.

Therefore, when the seedling planting device 4 is at a predetermined height with respect to the rice field T, the contact pressure of the sensor float SF is within the set range, and the attitude of the sensor float SF is within the set range. The sensor lever 65 is in the above-described predetermined rotation position, and a neutral state of the elevation control is provided.
Then, when the seedling planting device 4 sinks against the rice field surface, the contact pressure of the sensor float SF increases from the set range, so that the front part of the sensor float SF is relatively pushed up and displaced, and the inner position of the sensor wire 64 is displaced. Wire 64a
Is pulled, and the seedling planting apparatus 4 is controlled to rise as described above. Then, the sensor float S
When the ground pressure of F returns to the set range and the attitude of the sensor float SF is returned to the original position, the ascent operation stops. Further, when the seedling planting device 4 starts to float on the rice field T, the contact pressure of the sensor float SF decreases from the set range,
The front portion of the sensor float SF is displaced downward by its own weight and the biasing load, and the inner wire 6 of the sensor wire 64 is displaced.
4a is loosened, and the planting device 4 is controlled to descend as described above. Then, the sensor float SF is controlled by the descending control.
When the ground pressure returns to the set range and the attitude of the sensor float SF is returned to the original position, the lowering operation stops. As described above, the fact that the sensor float SF is vertically displaced by the fluctuation of the ground contact pressure is electrically detected by the potentiometer 67 and the operation of the electromagnetic control valve 50 is controlled, so that the seedling planting apparatus 4 always keeps the predetermined position relative to the rice field. It is maintained at the height of.

When the reciprocating planting operation is performed by using the main operation path 56a, when the planting of one stroke is completed and the ridge is reached, the planting lever 54 is simultaneously operated to the "up" position to plant the seedling. As the device 4 is raised, the planting clutch 24 is disengaged, and at the same time, the aircraft turns. In this case, when the seedling planting device 4 reaches the upper limit, this is detected by the upper limit switch LS, and the ascent is automatically stopped. Then, when the direction change is almost completed, the planting lever 54 is once operated to the “down” position to lower the seedling planting device 4 until it comes into contact with the rice field T. At this time, the planting clutch 24 is still in the disconnected state. Then, when the direction change and the alignment for the next planting process are completed, the automatic raising / lowering control is restarted by operating the planting lever 54 to the “planting” position, and the planting clutch 24 is turned on to start the next planting. The planting run of the process is performed.

The "automatic" position of the auxiliary operation path 56b is an operation position for simplifying the operation at the ridge in the reciprocating planting operation and setting a mode for efficient planting operation. Lifting and planting clutch 24
Is turned on and off by the priority operation lever 70 provided on the right side of the steering handle 17 as follows.

The priority operation lever 70 is formed in a cross-operation type capable of swinging up and down and swinging back and forth, and is urged to return to a neutral position. Upward operation and downward operation are performed by the up switch Sw (u), respectively. And the down switch Sw (d), and based on the detection result, the operation of the electromagnetic control valve 50 and the electric motor 61 is controlled as follows.

When the priority operation lever 70 is operated upward and the up switch Sw (u) is turned on once while the planting lever 54 is operated at the "automatic" position, the electric motor 61 operates in the planting clutch disengaging direction. Then, the planting clutch 24 is disengaged, and after confirming the disengaging clutch disengagement operation, the electromagnetic control valve 50 is switched to the ascending operation state,
The seedling planting apparatus 4 is preferentially raised to the upper limit. Further, with the seedling planting device 4 being raised, the priority operation lever 70 is operated downward to set the down switch Sw (d) to one.
When the turn-on operation is performed, the electromagnetic control valve 50 is switched to the descending operation state, and when the sensor float SF of the seedling planting device 4 is brought into contact with the rice field T and the output of the potentiometer 67 is changed, the state becomes the automatic elevating control state, and the predetermined control is performed. It operates downward until a neutral state is brought about. Here, in the first ON operation of the down switch Sw (d), the seedling planting device 4 only operates to descend, the electric motor 61 does not operate, and even if it descends to the rice field T, the planting operation is not performed. Will not be heard. Then, the priority operation lever 70 that has returned to the neutral position is again operated downward, and the down switch Sw (d)
When the is turned on for the second time, the electric motor 61 is operated, the planting clutch 24 is engaged, and the planting operation is started.

Therefore, if the planting lever 54 is operated to the "automatic" position, when the planting travel of one stroke is completed and the plant reaches the edge of the ridge, it is only necessary to lightly operate the priority operation lever 70 upward once. Then, the planting clutch 24 is turned off and the seedling planting device 4 is raised, so that the operator can concentrate on the operation of the steering handle 17.
In addition, at an appropriate time until the end of the airframe direction change, by lightly operating the priority operation lever 70 once downward with a finger,
The seedling planting device 4 can be lowered until the planting device 4 touches down without touching the planting clutch 24. At the end of the change of the airframe direction, alignment to the next process is performed, and the end position of the seedling row in the previous planting process is determined and priority is given. By lightly operating the operation lever 70 downward again, the planting start position of the next process can be aligned with the planting end position of the previous planting process. The above-described operation based on the up / down operation of the priority operation lever 70 is performed only when the planting lever 54 is operated in the “automatic” position, and the planting lever 54 is in the “automatic” position. When the priority operation lever 70 is not operated, the priority operation is not performed.

On the left and right sides of the seedling planting apparatus 4, there are provided drawing markers 71a, 71b for scratching and forming a machine running reference line of the next stroke on the rice field T, and are provided so as to be freely retractable and project to a drawing action posture. Operating lever 70
By the operation in the front-back direction, the drawing markers 71a and 71b to be used for drawing are mechanically selected. In other words, when the seedling planting apparatus 4 moves upward, the left and right drawing markers 71a, 71b which are urged to project are moved by the upward swinging movement of the quadruple link mechanism 6 to move the wires 72a, 7b.
2b, they are stored upright, and are locked and locked in their standing storage positions by lock mechanisms 73a, 73b. The left and right lock mechanisms 73a, 73b and the priority operation lever 70 are connected to each other by a wire, and the left and right lock mechanisms 73a, 73 are operated by operating the priority operation lever 70 forward or backward.
b is selectively unlocked. That is, when the priority operation lever 70 is operated forward from the neutral position, the lock mechanism 73a of the left drawing marker 71a is unlocked, and when the priority operation lever 70 is operated forward from the neutral position, the right drawing marker 71b is The lock mechanism 73b is unlocked, and only the unlocked one of the line drawing markers 71a or 71b is urged and protruded to the use posture by lowering the seedling planting device 4. Since the selection of the drawing markers 71a, 71b by the operation of the priority operation lever 70 in the front-rear direction is performed mechanically, the planting lever 54 is connected to the main operation path 56.
Also works when in a.

If the planting lever 54 is operated to the "automatic" position, the automatic raising control (backup control) of the seedling planting apparatus 4 based on the backward movement of the machine is executed. That is, the main transmission lever 18 that operates the hydrostatic stepless transmission 22 as the main transmission to adjust the forward and backward movements in a stepless manner is
On the left side of the steering handle 17, a front and rear swinging operation is provided from a forward range F to a reverse range R. When the main speed change lever 18 is moved beyond the neutral N to the reverse range R, the reverse switch is operated. SB, the electromagnetic control valve 50 is preferentially switched to the ascending operation state based on this detection, the seedling planting device 4 is automatically moved up, the planting clutch 24 is turned off, and the leveling float is set by the body reverse. A situation in which the rear portion of the bush 34 enters the rice field T or collides with the ridge is prevented beforehand.

As described above, by operating the planting lever 54 at the "automatic" position, it is effective to simplify the operation on the ridge side and efficiently perform the planting operation. When shifting the planting lever 54 from the main operation path 56a to the auxiliary operation path 56b, the following check works. In other words, the bracket 52 that supports the planting lever 54 so as to be able to rotate laterally around the longitudinal axis b is attached to the restraint 5.
2a is extended downward and the planting lever 54
A contact portion 54b is formed at a lower end portion of the support member 52b, which is bent toward the inside of the machine below the fulcrum shaft portion 54a and faces the rear end edge e of the restraint portion 52a. And planting lever 5
4 is operated in the main operation path 56a, the contact portion 54b can be arbitrarily moved back and forth without interfering with the restraining portion 52a, and the planting lever 54 is positioned at the rear end of the main operation path 56a. When the "up" position is reached, the contact portion 54b is in close proximity to the rear end edge e of the restraining portion 52a, and it is no longer possible to operate the planting lever 54 backward. That is, the rear operation limit on the main operation path 56a is restricted, and the planting lever 54 is prevented from colliding with the rear end of the lever guide hole 56 and being damaged or deformed. .

Then, the planting lever 54 in the "up" position is set.
Is moved to the left in the step portion of the lever guide hole 54, the contact portion 5 extending below the lever fulcrum
4b is displaced rightward and detached from the rear edge e of the restraining portion 52a. Therefore, in this state, the planting lever 54 is allowed to operate further backward, that is, the operation along the auxiliary operation path 56b, and the "automatic" operation at the rear end of the auxiliary operation path 56b is allowed.
It can be moved to a position.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the traveling body.

FIG. 3 is a plan view of a front part of the fuselage.

FIG. 4 is a plan view showing a transmission structure of the seedling planting apparatus.

FIG. 5 is a front view as seen from the back of the seedling planting apparatus.

FIG. 6 is a cross-sectional plan view of the planting case.

FIG. 7 (a) A side view of the entire planting lever operation unit (b)
Top view of lever guide

FIG. 8 is a side view of the planting lever operation unit.

FIG. 9 is a side view showing a part of the planting lever operation unit.

FIG. 10 is a side view of the planting clutch operation drive unit.

FIG. 11 is a bottom view of the planting lever operation unit.

FIG. 12 is a front view of a planting lever restraining structure.

FIG. 13 is an association diagram of a control structure.

[Explanation of symbols]

3 traveling aircraft 4 Seedling planting equipment 16 Driver's seat 24 planting clutch 52 bracket 52a Checking unit 54 Planting Lever 54a contact part 56 lever guide hole 56a Main operation route 56b Auxiliary operation route

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Saiko Emiko 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works Co., Ltd. (56) References JP-A-11-313515 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A01C 11/02

Claims (1)

(57) [Claims] 1. A lever operation structure of a riding rice transplanter having a plurality of seedling planting devices connected to a rear portion of a traveling body so as to be able to move up and down, wherein a resin cover portion provided on a lateral side portion of a driver seat is provided. In addition, a lever guide hole is formed in which a main operation path heading in the front-rear direction and an auxiliary operation path heading in the front-rear direction are connected in a stepped manner, and the planting lever can be pivoted back and forth and left and right from this lever guide hole. A projecting lever configured to be capable of laterally operating a planting lever from one end position of the main operation path that controls the raising and lowering of the seedling planting apparatus and the on / off of the planting clutch to shift to an auxiliary operation path, and swinging the planting lever. A restraining portion is formed on a freely supported fixed bracket, and a contact portion capable of contacting the restraining portion is connected to the planting lever. When the contact portion of the planting lever is opposed to the restraining portion of the bracket when in the one end position, the contact portion is moved from the restraining portion by moving the planting lever to the auxiliary operation path side at this position. A lever operation structure of a riding rice transplanter, wherein the lever operation structure is configured to be allowed to deviate along an auxiliary operation path.