JPH0965734A - Riding-type seedling planter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the work efficiency by providing a riding-type mobile machine body with a reserve seedling holding table and supplying the seedling from the reserve seedling holding table to a seedling holding table of a seedling planter when the seedling planting apparatus is lifted with a link mechanism during the gyration of the machine body at the levee of a field. SOLUTION: A seedling planting apparatus 23 having a seedling lack sensor detecting the decrease of the residual seedlings placed on a seedling holding part of a seedling holding table 28 is attached in vertically movable state through a link mechanism 21 to a riding-type mobile machine body 1 furnished with the reserve seedling holding table 41. In a riding seedling planter having the above construction, the reserve seedling holding table 41 is placed to position the seedling delivery side of the reserve seedling holding table 41 opposite to the seedling receiving side of the seedling holding table 28 in the case of lifting the seedling planting apparatus 23 and the planting apparatus is provided with a seedling supplying apparatus to supply seedling to a seedling holding part holding a decreased amount of residual seedlings detected by the seedling lack sensor of the seedling holding table 28 in the case of lifting the seedling planting apparatus 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding type seedling planting machine equipped with a linking mechanism and a seedling planting device which can be moved up and down by a link mechanism. When the table is provided and the seedling planting device is moved up by the link mechanism when turning at the edge of the field, seedlings are supplied from the preliminary seedling planting table to the seedling planting device of the seedling planting device to improve work efficiency. Is improved.

[0002]

2. Description of the Related Art Conventional techniques of this kind include:
There is a riding-type rice transplanter in which a riding-type running vehicle equipped with a spare seedling stand is equipped with a seedling planting device that is vertically movable by a link mechanism. However, in the above, when the number of seedlings on the seedling placement table of the seedling plant becomes low during rice planting work, the operation of the machine is stopped and then the seedlings are supplied from the spare seedling placement platform to the seedling placement stand of the seedling planting device. Therefore, every time the seedlings are supplied, the aircraft must stop running,
It was very inefficient.

[0003]

In order to solve the above-mentioned problems of the prior art, the present invention provides a riding type vehicle body 1 equipped with a spare seedling mount 41 with a seedling mount 2 via a link mechanism 21.
In the riding type seedling planter in which the seedling planting device 23 provided with the seedling cutting sensor S1 for detecting that the number of seedlings placed on the seedling placing portion 28a of No. 8 is reduced is provided. When the device 23 is moved up, the auxiliary seedling placing table 41 is arranged at a position where the seedling sending side of the preliminary seedling placing table 41 and the seedling receiving side of the seedling placing table 28 face each other, and the seedling planting device 23 is moved upward. A riding type seedling planting machine, characterized in that a seedling supply sensor A for supplying seedlings to the seedling placing portion 28a, which detects when the seedling cutting sensor S1 of the seedling placing table 28 has run out when the seedling placing table 28 is moved, is provided. It was done.

[0004]

According to the present invention, when the seedling planting device 23 is moved upward, the spare seedling placing base 41 and the seedling receiving side of the seedling placing base 28 face each other at a position where the spare seedling placing base 41 faces each other. 41 is arranged, and when the seedling planting device 23 is moved upward, the seedling supply sensor A for supplying seedlings to the seedling placing portion 28a, which is detected by the seedling cutting sensor S1 of the seedling placing table 28, is provided. Therefore, when the seedling planting device 23 is moved up at the edge of the ridge to rotate the machine body, seedlings are automatically supplied from the preliminary seedling placing table 41 to the seedling placing portion 28a of the seedling placing table 28 with a reduced seedling, It is possible to solve the problems of the conventional technology, which had to stop the traveling of the aircraft each time the seedling was supplied, and to perform seedling planting work with extremely high work efficiency.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A riding type rice transplanter according to an embodiment of the present invention shown in the drawings will be described. Reference numeral 1 denotes a riding type traveling vehicle body, which has an engine 4 mounted on the rear upper surface of left and right frames 2 and 3 constituting an airframe, and a traveling mission case 5 is provided at a front portion of the left and right frames 2.3. The traveling transmission case 5 incorporates an HST in which the rotational driving force of the engine 4 is shifted by the shift lever 6, a front wheel differential mechanism, and a rear wheel differential mechanism.

Reference numeral 7.7 denotes a left and right front axle case, which is configured so that power is transmitted from a front wheel differential mechanism of the traveling transmission case 5 via left and right drive shafts 8.8. Reference numerals 9 and 9 denote front and rear steering drive wheels, which are fitted on the lower portions of the left and right front axle cases 7 and are pivotally mounted on a steering case 11 and 11 which is rotated by a steering handle 10 described later.

Reference numeral 12 denotes a steering transmission case having a transmission gear therein, which is fixed to the front ends of the left and right frames 2 and 3, and a handle post 13 is fixed to an upper portion thereof, and an upper end of the handle post 13 is provided. The steering handle 1
0 is provided. A link 14 as a steering transmission mechanism whose rear end is connected to the left and right steering cases 11 and 11 is provided at a lower portion of the steering transmission case 12, and when the steering handle 10 is turned, the steering transmission case is turned off. Left and right steering case 11 via transmission gear / link 14 in 12
11 is rotated around the vertical axis so that the left-right steering drive front wheels 9, 9 are turned.

Reference numerals 15 and 15 are left and right rear wheel drive cases, which are integrally connected by a connecting frame 15a.
Is provided on a frame connecting the left and right frames 2 and 3 via a rolling shaft so as to be freely rotatable, and the left and right driving rear wheels 16 and 16 mounted on both right and left sides thereof are configured to be able to swing up and down. I have. Reference numerals 17 and 17 denote a rear wheel differential mechanism of the traveling transmission case 5 and a left and right rear wheel drive case 15.
・ A transmission shaft that transmits power to 15.

The left and right side clutches and left and right side brakes for the left and right drive rear wheels 16 and 16 are built in the transmission mechanism inside the rear wheel drive case 15, and the left and right clutch pedals provided in front of the engine 4 are provided. 18 ・ 1
The left and right side clutches are disengaged and the left and right side brakes are activated by the depression operation of 8. That is,
The drive of the rear drive wheels 16 and 16 on the side where the left and right clutch pedals 18 and 18 are depressed is stopped and the brakes are activated.

Reference numeral 19 denotes a vehicle body cover molded by FRP, and an engine cover portion 19 covering the periphery of the engine 4.
a, a step 19b provided on the front and left and right sides of the engine 4, a handle post cover 19c, and a step 19d provided on the rear of the engine 4 are integrally formed and fixed on the left and right frames 2.3. Has been done. 20
Is a control seat, which is installed and fixed on the upper surface of the vehicle body cover 19.

Reference numeral 21 denotes an upper link 21a and a lower link 21.
In the link mechanism configured by b, the base ends of the upper link 21a and the lower link 21b are the left and right frames 2.
The left and right support frames 22 and 22 fixed to 3 are pivotally attached to each other, and the rear ends thereof are pivotally attached to a vertical frame 25 provided with a rolling shaft 24 that supports a seedling planting device 23 described later in a freely rotatable manner.

Numeral 26 is a hydraulic cylinder, the base of which is pivotally attached to the left and right frames 2.3, and the piston 2
The swinging arm 21 whose rear end is integral with the upper link 21a
c. The seedling transplanting device 23 includes a planting transmission case 27 that also serves as a frame that is rotatably mounted on the rolling shaft 24 of the vertical frame 25, and the planting transmission case 2.
And a seedling support 28 supported by a support member provided in 7 and reciprocating in the left-right direction of the machine body, and a seedling mounted on the rear end of the planting transmission case 27 and extending from the lower end of the seedling support 28 by one plant. And a central leveling float 30 which is a leveling body whose rear part is pivotally supported at the lower part of the planting transmission case 27 and whose front part is vertically swingable. It is composed of left and right leveling floats 31. The left and right leveling floats 31 and 31 are arranged behind the left and right driving rear wheels 16 and 16, respectively, to level the field disturbed by the left and right driving rear wheels 16 and 16 and to set seedlings by a seedling planting device 29. Is provided to level the front of the field where the plants are planted.

Reference numeral 32 denotes a PTO transmission shaft having universal joints at both ends, which is provided to transmit power to the planting transmission case 27 of the seedling planting device 23. Reference numeral 33 denotes a hydraulic valve provided between the upper surface of the front part of the central terrain float 30 and the planting transmission case 27.
When the front portion of the cylinder 0 is lifted beyond an appropriate range by an external force, the hydraulic pump 34 sends pressure oil pumped out of the traveling mission case 5 to the hydraulic cylinder 26 to protrude the piston and cause the link mechanism 21 to move. Raise the seedling plant 2
3 is raised to a predetermined position, and when the front part of the center leveling float 30 falls below an appropriate range, the hydraulic oil in the hydraulic cylinder 26 is returned to the traveling transmission case 5 to lower the link mechanism 21. To lower the seedling planting device 23 to a predetermined position, and when the front part of the central leveling float 30 is in an appropriate range (when the seedling planting device 23 is in an appropriate predetermined position), the hydraulic oil in the hydraulic cylinder 26 is Is provided so as to stop the ingress and egress of the seedlings and hold the seedling planting apparatus 23 at a fixed position. Thus, the central leveling float 30 is used as a ground contact sensor for automatic height control of the planting device 23.

Reference numeral 35 denotes an operating lever which projects from the vehicle body cover 19 and is provided on the right side of the control seat 20. It cuts off the power for driving and rotating the PTO transmission shaft 32 provided in the traveling mission case 5. The PTO clutch in contact with the seedling planting device 23 is configured so that the power to the seedling planting device 23 can be turned on and off, and the hydraulic valve 33 can be operated to manually move the seedling planting device 23 up and down. ing. That is, when the operation lever 35 is rotated forward to the position D2, the PTO clutch is engaged, the seedling planting apparatus 23 is driven, and the hydraulic valve 33 is switched to an automatic control state by the vertical movement of the center leveling float 30. Conversely, the operation lever 35
Is rotated backward to the U position, the PTO clutch is disengaged, the operation of the seedling planting device 23 is stopped, and the hydraulic valve 33 is forcibly switched to the side in which the seedling planting device 23 is raised, and the seedling planting device 23 is moved. Be raised. When the operating lever 35 is set to the N position in the middle of the operating stroke, the PTO clutch is disconnected, the operation of the seedling plant 23 is stopped, and the hydraulic valve 33 is stopped.
Is switched to a position where the inflow and outflow of pressurized oil in the hydraulic cylinder 26 is stopped and the seedling plant 23 is held at a fixed position, and the seedling plant 23 is held at the position when the operating lever 35 is operated to the intermediate position. The device 23 does not rise or fall.
Further, when the operation lever 35 is set to the D1 position, the PTO clutch is disengaged and the hydraulic valve 33 is in an automatic control state in which the hydraulic valve 33 is switched by the vertical movement of the float 30. The operation lever 35 is configured to be locked at each of the operation positions (D2, D1, N, U) by well-known locking means using a cam so that the operation position is maintained.

Here, the seedling placing table 28 will be described. The seedling mounting table 28 is a mat-shaped seedling (60 cm long and 30 cm wide)
An upper guide body 36 composed of a seedling placing portion 28a for receiving the bottom surface of a common seedling and a side wall portion 28b for guiding the side surface of the mat-shaped seedling, and having a base fixed to the planting transmission case 27.
And a lower guide 37, and are reciprocally moved left and right by a left-right reciprocating mechanism 38. The six seedling-planting devices 29 are each arranged in a line in the left-right direction. The seedlings for one plant can be divided from the lower end of the mat-shaped seedling placed on the section 28a.

Reference numeral 39 denotes a seedling feeding belt, which is arranged in parallel at the bottom of the seedling placing portion 28a, two by two, and is placed on the seedling placing portion 28a when the seedling placing table 28 reaches the left and right reciprocating end. The mat-shaped seedlings are transferred to the bottom edge by the amount of one stock. S1 to S6 are seedling cut sensors, which are provided to protrude upward from the seedling receiving surface of the seedling mounting portion 28a. When the mat-shaped seedling placed on the seedling mounting portion 28a is on each of the seedling cut sensors S1 to S6, the mat-shaped seedling is pushed by the mat-shaped seedling sensors S1 to S6.
Numeral 6 is an OFF state, in which the mat-shaped seedlings placed on the seedling mounting portion 28a are sequentially transferred to the lower end by the seedling feed belt 39, and the upper end of the mat-shaped seedling passes through the seedling cutout sensors S1 to S6 and is matted. When the seedlings disappear from each of the sensor S1 to S6, the sensors S1 to S6 are turned ON. That is, when the number of mat-shaped seedlings decreases to a position below the respective seedling cut sensors S1 to S6, each seedling cut sensor S
Steps S1 to S6 are in the ON state to detect the lack of seedlings. still,
The seedling cutting sensors S1 to S6 are arranged at positions 60 cm from the upper end (seedling receiving side) of the seedling mounting portion 28a,
When one mat-shaped seedling can be placed, it is designed to detect the seedling shortage.

Reference numeral 40 denotes a stroke sensor, the base of which is fixed to the planted transmission case 27, and the tip of the detecting and operating portion is fixed to the seedling mounting table 28 so that the lateral position of the seedling mounting table 28 can be detected. It has become. On the other hand, S7 is an upward movement detection switch provided corresponding to the position where the link mechanism 21 is moved up most in the hydraulic cylinder 26, and is linked when the seedling planting device 23 is moved up in the link mechanism 21. It comes into contact with the mechanism 21 and turns on, which is used to detect that the seedling stand 28 is at the uppermost position.

Next, the preliminary seedling stand 41 will be described.
The spare seedling stand 41 is disposed behind the control seat 20 and connects the lower stage mount 42 and the upper stage mount 43 to the left and right connecting frames 44.4.
4 is connected and fixed. The lower stage table 42 is fixed to the upper end of a guide rail 45 that also serves as a frame having a U-shaped cross section, a movable body 46 that moves left and right in the guide rail 45, and upper protruding portions 46a and 46a integrally formed with the movable body 46. It is composed of a lower stage preliminary seedling placing portion 47 and an electric cylinder C1 whose lower portion is fixed to a guide rail 45. The tip ends of the left and right moving rods 48 of the electric cylinder C1 are upwardly projecting integrally formed on the moving body 46. Part 46a / 46a
It is fixed to. And, in the lower stage spare seedling placement section 47,
6 corresponding to the 6 seedling mounting portions 28a of the seedling mounting base 28
One spare seedling mounting portion 49 is provided, and each spare seedling mounting portion 49 is provided with a seedling feeding belt 50 that is operated by the electric motors M1 to M6.

The upper stage table 43 has a guide rail 51 which also serves as a frame having a U-shaped cross section, a movable body 52 which moves left and right in the guide rail 51, and upper ends of upper protruding portions 52a, 52a formed integrally with the movable body 52. Fixed upper stage seedling placing section 53
And electric cylinder C whose upper part is fixed to the guide rail 51
2, the tip ends of the left and right moving rods 54, 54 of the electric cylinder C2 are fixed to the upper protruding portions 52a, 52a formed integrally with the moving body 52. Then, in the upper stage preliminary seedling placing section 53, six preliminary seedling placing sections 55 ... Corresponding to the 6 seedling placing sections 28a of the seedling placing table 28.
Are provided, and the seedling feeding belts 56 ... Operated by the electric motors M7 to M12 are provided in the preliminary seedling placement portions 55.

An electric cylinder C1 for moving the lower stage preliminary seedling placing portion 47 left and right along the guide rail 45, a seedling feeding belt 50 operated by electric motors M1 to M6 of the lower stage placing table 42, an upper stage preliminary seedling placing portion. An electric cylinder C2 for moving left and right 53 along the guide rail 51 and an upper stage mount 43
Seedling feeding belt 5 operated by the electric motors M7 to M12 of
6 and the like constitute a seedling supply device A that supplies seedlings from the preliminary seedling mounting table 41 to the seedling mounting table 28.

The guide rail 45, which also serves as the frame of the lower stage table 42, is fitted into the left and right support frames 22 and 22 and is mounted on the left and right guide bodies 57 and 57 so as to be movable back and forth.
Is fixed to the upper end of an electric cylinder 58 that moves forward and backward in the vertical direction by an electric motor M13 whose bottom is fixed to the machine body, and the preliminary seedling stand 41 is configured to be vertically movable by driving the electric motor M13. . The electric motor M13 is operated by the operation lever 59. That is, when the operation lever 59 is set to the upper position, the switch S8 is turned on, the electric cylinder 58 is extended by the electric motor M13, and the seedling feeding belt of the lower stage preliminary seedling placing section 47 of the lower stage placing table 42 of the preliminary seedling placing stage 41 is expanded. The rear end 50 (seedling delivery side) is moved up to the same position as the upper end (seedling receiving side) of the seedling mounting table 28 at the uppermost position. Conversely, when the operation lever 59 is set to the lower position, the switch S9 is turned on, the electric cylinder 58 is contracted by the electric motor M13, and the upper stage mounting table 4 of the preliminary seedling mounting table 41 is moved.
The rear end (seedling sending side) of the seedling feeding belt 56 of the upper stage preliminary seedling placing portion 53 of 3 is moved downward so as to be at the same position as the upper end (seedling receiving side) of the seedling placing table 28 at the uppermost position. It

On the other hand, S10 is an operation position detection switch provided corresponding to the position where the operation lever 35 is operated to the U position, and is O when the operation lever 35 is operated to the U position.
It becomes the N state, and it is detected that the seedling planting device 23 is operated to be raised. Reference numeral 60 denotes a lock body pivotally supported on the machine body by a pivot pin 61, and has a hook-shaped portion 60a at its tip.
Is in contact with the engaging portion 35a of the operation lever 35 to lock the operation lever 35 at the U position. The lock body 60 is urged by a spring 62 in the lock action direction, so that the solenoid SOL pulling the pin 63 in the energized state can switch the lock body 60 between the lock action state and the lock release state. Has become.

That is, when the solenoid SOL is energized, the pin 63 is pulled in and brought into the solid line state in the figure, and the lock body 6
Zero is locked by the spring 62. At this time, when the operating lever 35 is operated from a position other than the U position to the U position, the engaging portion 35a of the operating lever 35 passes through the opposite slope 60b of the hook-shaped portion 60a of the lock body 60 (the engaging portion 35a. (The lower end of the lock member pushes down the inclined surface 60b against the biasing force of the spring 62) and the engaging portion 35a is locked to the hook-shaped portion 60a of the lock body 60. Then, after being locked by the hook-shaped portion 60a, the operation lever 35 cannot be operated to any position other than the U position. Conversely, the solenoid SO
When L is no longer energized, the pin 63 projects and becomes the state of the dotted line in the figure, and the hook-shaped portion 60a of the lock body 60 is
The operation lever 35 can be freely operated by moving downward against 2 and not engaging the engagement portion 35a of the operation lever 35.

M14 is an electric motor for operating the speed change lever 6 from the high speed position (H) to the low speed position (L), and when energized, its arm 64 makes one counterclockwise rotation as shown in the figure. It has become. That is, when the electric motor 14 is energized, the arm 64 rotates once, but at that time,
When the speed change lever 6 is in the high speed position (H), the arm 64 causes the engagement pin 6b of the arm 6a provided on the speed change lever 6 to be engaged.
To shift the shift lever 6 to the low speed position (L).

R1 to R6 are the seedling cutting sensors S1
~ S6 is a relay that is excited when it is in the ON state, when the seedling cutting sensor S1 is in the ON state, the switch SR1 is in the ON state, and similarly, each seedling cutting sensor S2 to S6 is in the ON state Then, the corresponding switches SR2 to SR6 are turned on. L and B are an alarm lamp and an alarm buzzer, which are provided to issue an alarm when supplying the preliminary seedlings as shown in the electric circuit to inform the worker that the preliminary seedlings are being supplied. Next, the working state in which the above-mentioned riding type rice transplanter performs rice transplanting work will be described.

First, the mat-like seedlings are placed on each seedling placing portion 28a of the seedling placing table 28 and all the spare seedling placing portions 49 ... 55 of the spare seedling placing table 41, and the operation lever 59 is set to the upper position. And the preliminary seedling stand 41 is moved upward (S8 is in the ON state). Then, after the engine 4 is started, the speed change lever 6 is set to the high speed position (H) to advance the machine body, and the operation lever 35 is operated to the D2 position, so that the seedling planting device 23 is automatically controlled to move up and down. Rice planting work is performed.

During the rice planting work, the seedling placing section 28a of the seedling placing table 28 is used.
Suppose that the number of seedlings placed on is reduced and, for example, the seedling cutting sensors S1 and S2 are turned on. Then, when the operation lever 35 is operated to the U position in order to turn the aircraft at the edge, the PTO clutch is disengaged, the operation of the seedling planting device 23 is stopped, and the hydraulic valve 33 forcibly raises the seedling planting device 23. The seedling planting device 23 is switched to the side and the seedling planting device 23 is raised. At this time, first, S10 is turned on by the operating lever 35, and the electric cylinder C1 and the electric motor M14 are energized. Then, the stroke sensor 40 detects the left and right positions of the seedling placing table 28, and the electric cylinder C1 operates to move the lower preliminary seedling placing portion 47 to the same position as the seedling placing table 28. On the other hand, the electric motor M14 rotates the arm 64 once to switch the speed change lever 6 from the high speed position (H) to the low speed position (L), so that the vehicle runs at a low speed where turning on the ridge is easy.

When the seedling planting device 23 is raised to the highest position, the upward movement detecting switch S7 is turned on.
Then, only the electric motors M1 and M2 of the lower preliminary seedling placing section 47 corresponding to the seedling cutting sensors S1 and S2 are operated and the seedling feeding belt 50 causes the seedling placing table 28 having the seedling cutting sensors S1 and S2. Preliminary seedlings are supplied only to the mounting portion 28a. At this time, the alarm lamp L and the alarm buzzer B give an alarm to inform the operator that the preliminary seedling supply state is maintained until the seedling cutting sensors S1 and S2 are turned off.

On the other hand, in this preliminary seedling supply state, the solenoid SOL is energized and the pin 63 is pulled in, and the lock body 60 enters the lock action state.
It is possible to prevent a situation in which the operation lever 35 cannot be operated to a position other than the U position by being locked in the position, and the operation lever 35 is erroneously operated to move the seedling planting device 23 downward in the preliminary seedling supply state. .

When the preliminary seedling is supplied to the seedling placing portion 28a of the seedling placing table 28 having the seedling cutting sensors S1 and S2 and the seedling cutting sensors S1 and S2 are turned off, the lock body 60 is unlocked. Therefore, the operator operates the operation lever 35 to the D2 position, returns the speed change lever 6 to the high speed position (H), and restarts the rice planting work. When there are no seedlings in the lower preliminary seedling placing section 47, the operation lever 59 is set to the lower position and the preliminary seedling placing table 41 is moved downward (S9 is in the ON state).

Then, similarly to the above, the seedlings placed on the seedling mounting portion 28a of the seedling mounting base 28 are reduced during the rice planting operation, and, for example, the seedling cutting sensors S1 and S2 are turned on and the ridges are cut off. When the operation lever 35 is operated to the U position in order to turn the machine body, the S10 is turned on and the electric cylinder C2 and the electric motor M14 are energized. Then, when the stroke sensor 40 detects the left and right positions of the seedling placing table 28, the electric cylinder C2 is operated and the upper stage preliminary seedling placing portion 53 is operated.
Is moved to the same position as the seedling table 28. On the other hand, the arm 64 rotates once by the electric motor M14, and the gear shift lever 6
Is switched from the high-speed position (H) to the low-speed position (L), and low-speed traveling in which turning on the ridge is easy is performed.

Then, when the seedling planting device 23 is raised to the highest position, the upward movement detection switch S7 is turned on.
Then, only the electric motors M7 and M8 of the upper stage preliminary seedling mounting portion 53 corresponding to the seedling cutting sensors S1 and S2 are activated and the seedling feeding belt 50 causes the seedling mounting table 28 having the seedling cutting sensors S1 and S2. Preliminary seedlings are supplied only to the mounting portion 28a.

The case where the seedling cutting sensors S1 and S2 are turned on has been described, but another seedling cutting sensor S3 is used.
The same applies when ~ S6 is turned on. And
Since the drive means of the seedling supply device A is an electric motor that is a drive means different from the drive system of the riding-type traveling vehicle body 1 and the seedling planting device 23, for example, it is mainly used during the turning of the machine at the ridge. Even if you disengage the clutch and stop the riding type vehicle body 1,
The seedling supply work is performed without stopping by an electric motor, which is another driving means, and proper seedling supply can be performed.

Therefore, when the seedling planting device 23 is moved up at the edge of the ridge to rotate the machine body, the seedling cutting sensor S of the seedling mounting table 28 is moved.
Seedling placing section 28 which detected that 1 to S6 were low in seedlings
Since the mat-like seedlings are automatically supplied from the preliminary seedling mounting table 41 only to a, rice planting work with extremely high work efficiency can be performed. Other examples will be described below.

In the above embodiment, the operation lever 35 is locked by the lock body 60 at the U position, and the operation lever 35 is erroneously operated in the preliminary seedling supply state to move the seedling planting device 23 downward. Although the structure for preventing the above has been described, the same operation can be achieved even if the operation lever 35 is locked at the N position. Further, the lock of the operation lever 35 by the lock body 60 is stopped so that the operation lever 35 can be freely operated. In the preliminary seedling supply state (for example, when the seedling supply device A is operating), the operation lever 35 is set to D1. Even if the hydraulic valve 33 is operated to the position and the D2 position, the hydraulic valve 33 may not be switched to the state of moving the seedling planting device 23 downward (or the oil passage to the hydraulic cylinder 26 may be cut off).

Further, in the above embodiment, the electric motor is used as the vertical movement driving means of the preliminary seedling placing table 41 and the driving means of the seedling feeding device A, but other driving means such as hydraulic driving or mechanical transmission is used. Is also good. However, the drive source of other drive means such as hydraulic drive or mechanical transmission is a drive path different from the drive system of the riding type traveling vehicle body 1 or the seedling planting device 23 (for example, live PTO).
Drive configuration).

Further, in the above-mentioned embodiment, the gear shift lever 6 is switched from the high speed position (H) to the low speed position (L) at the time of turning of the body so that the turning can be easily performed at the edge.
A sensor for detecting the operation amount of the steering wheel 10 is provided to have a configuration capable of detecting a straight-ahead operation state and a turning operation state,
Further, as shown in FIG. 10, when the electric motor 14 is a stepping motor, the operation lever 35 is operated to the U position and the operation amount of the operation handle 10 is changed when the operation lever 35 is moved to the U position at the time of turning the aircraft at the edge of the ridge. When the turning operation state of the sensor for detecting is detected, the electric motor 14 is turned by the angle w1 to change the speed change lever 6 from the high speed position (H) to the low speed position (L) to make the turning low speed running, and then the turning is ended. When the straight-movement operation state is detected when adjusting the machine body to a predetermined position (alignment of seedling planting position), the electric motor 14 is rotated by the angle w2 to shift the speed change lever 6 from the low speed position (L) to the fine speed position. It is also possible to adopt a configuration in which the vehicle is traveling at a slow speed and traveling at a slow speed (see FIG. 11). During this turning low speed traveling, the seedling planting device 23 is raised and the lower stage preliminary seedling placing portion 4
7 or the upper stage preliminary seedling placing portion 53 moves in the left-right direction to enter the seedling supply state, and the electric motor M1 is used during traveling at a low speed for adjusting the row.
By configuring so that M12 operates to supply seedlings, disorder of the supplied seedlings is reduced and stable seedling supply can be performed. Further, instead of the slow speed position described above, the stop position may be set so that the machine body stops when the electric motors M1 to M12 operate to supply seedlings.

Further, in the first embodiment, the gear shift lever 6 is switched from the high speed position (H) to the low speed position (L) at the time of turning of the body so that the turning can be easily performed at the edge.
As a configuration that switches to the low speed position (L) only when the seedling cutting sensors S1 to S6 detect that the seedlings are running low,
A structure capable of high-speed turning when seedlings are not supplied may be used. Furthermore, when the seedling cutting sensors S1 to S6 detect that the seedlings are running low, the mode is switched to the low speed position (L), and when the seedling cutting sensors S1 to S6 do not detect that the seedlings running low, the medium speed is set. As a configuration for switching to the above, it is also possible to adopt a configuration in which the turning is easy when the seedlings are not supplied, and the turning can be performed at a moderately slow speed.

Further, in the first embodiment, after the speed change lever 6 is switched from the high speed position (H) to the low speed position (L) by the electric motor 14 at the time of turning the machine body, it is manually moved from the low speed position (L). You have to switch to the high speed position (H),
Seedlings are supplied after turning the aircraft and seedling cutting sensors S1 to S6
The electric motor 14 is detected when it is turned off.
The workability is further improved by reversing and rotating automatically to switch from the low speed position (L) to the high speed position (H).

Further, in the first embodiment, only the seedling cutting sensors S1 to S6 for supplying the seedlings are provided, but the seedling cutting sensor S1 to S6 of the seedling mounting portion 28a is on the verge of cutting the seedlings further to the lower end side. If a sensor that detects that there is a problem is provided and an alarm is issued to notify the operator that seedlings should be supplied immediately or the machine is stopped, seedlings cannot be planted due to seedling shortage. It can be avoided.

In the first embodiment, the auxiliary seedling mount 41 is manually moved up and down by operating the operation lever 59 to move the electric motor M13.
And a seedling presence / absence detection sensor is provided in each of the spare seedling mounting portions 49 ... 55 of the upper stage spare seedling mounting portion 53, and seedling cutting sensors S1 to S6 are provided.
When it is detected that there is a seedling in the spare seedling placing portion 55 of the upper stage spare seedling placing portion 53 corresponding to the seedling placing portion 28a in the ON state, the electric motor M13 is moved to move the spare seedling placing base 41 downward. Also, it is detected that there is no seedling in the spare seedling mounting portion 55 of the upper spare seedling mounting portion 53 corresponding to the seedling mounting sensor 28a in which the seedling cutting sensors S1 to S6 are in the ON state, and the lower spare seedling mounting portion 47 is spared. When it is detected that there is a seedling in the seedling placing section 49, the electric motor M13 is moved to move the preliminary seedling placing base 41 upward, and further,
Seedling placement section 2 with seedling cutting sensors S1 to S6 turned on
When it is detected that there is no seedling in the spare seedling placing section 55 of the upper stage spare seedling placing section 53 corresponding to 8a and that there is no seedling in the spare seedling placing section 49 of the lower stage spare seedling placing section 47, an alarm is issued. With the configuration, the preliminary seedling supply can be performed automatically.

[Brief description of drawings]

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

FIG. 2 is a rear plan view of a riding rice transplanter.

FIG. 3 is a plan view showing a main part of a seedling planting device.

FIG. 4 is a side view of the link mechanism.

FIG. 5 is a rear view showing the operation of the preliminary seedling stand.

FIG. 6 is a side view illustrating the operation of the operation lever 35.

FIG. 7 is a side view illustrating the operation of the operation lever 59.

FIG. 8 is a side view illustrating an operation of the shift lever 6.

FIG. 9 is an electric circuit diagram.

FIG. 10 is a side view for explaining the operation of the shift lever 6 according to the second embodiment.

FIG. 11 is an explanatory view of the action of turning speed.

[Explanation of symbols]

 1 Riding type vehicle body 21 Link mechanism 23 Seedling planting device 28 Seedling placing table 28a Seedling placing part 41 Preliminary seedling placing stage A Seedling supplying device S1 to S6 Seedling cutting sensor

Claims (1)

[Claims] 1. A seedling mounting portion 28 of a seedling mounting base 28 via a link mechanism 21 to a riding type traveling vehicle body 1 equipped with a spare seedling mounting base 41.
In the riding type seedling planter in which the seedling planting device 23 provided with the seedling cutting sensor S1 for detecting that the number of seedlings placed on a is decreased, the seedling planting device 23 is moved upward. When this is done, the seedling sending side of the preliminary seedling mounting table 41 and the seedling mounting table 28
The preliminary seedling stand 41 is arranged at a position facing the seedling receiving side of the seedling stand 28 and the seedling stand 28 is moved when the seedling planting device 23 is moved upward.
The riding-type seedling planting machine, which is provided with a seedling feeding device A for feeding seedlings to the seedling placing portion 28a which has detected that the seedling cutting sensor S1 of FIG.