JPH078045A - Rice transplanter with fertilizer application - Google Patents

Abstract

(57) [Summary] [Purpose] The shutter is closed instantly in conjunction with the stop of the planting operation, and at the beginning of the planting operation, the shutter is closed at a desired low speed, thereby eliminating waste at the end of the planting process. The supply of fresh fertilizer is blocked and the shortage of fertilizer at the beginning of the next planting process can be prevented. In the rice transplanter with a fertilizer application, which is provided with a shutter 20 which is biased to be closed and is provided on an upper part of the grooving device 13, and an electric shutter opening / closing drive mechanism 21 which causes the shutter 20 to close at high speed and open at low speed, The shutter opening / closing drive mechanism 21 includes a lock member 26 that holds the shutter 20 that is biased to be closed in an open attitude, an electromagnetic solenoid 27 that forcibly moves the lock member 26 to a release position in conjunction with the stop of the planting operation, and the shutter 20. Is provided with a cam member 31 forcibly moving to the open posture against the urging force, and an electric motor 30 for operating the cam member 31 at a low speed in conjunction with the start of the planting operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter equipped with a fertilizer application apparatus, which is adapted to apply fertilizer at the same time as seedling planting work.

[0002]

2. Description of the Related Art A fertilizer application device for rice transplanters uses a hose to guide the granular fertilizer fed by a feeding mechanism from a hopper, and supplies it downward to a grooving device mounted on a float to form a fertilizing groove formed by the grooving device. While configuring to send in,
Many of those in which the feeding mechanism and the planting mechanism are interlockingly connected are often used. With this configuration, the operation of the planting mechanism and the operation stop of the feeding mechanism can be synchronized,
There is an advantage that fertilizer can be supplied without waste only during planting operation.

However, in this structure, since it takes some time for the fertilizer fed by the feeding mechanism to reach the grooving device, strictly speaking, even if the feeding is stopped, the fertilizer is immediately stopped in the fertilizer ditch. No fertilizer was supplied to the fertilizer ditch immediately after the start of feeding. As a result, when the planting clutch was disengaged and the planting operation was stopped in order to change the direction of the car body at the ridge after finishing the planting run for one stroke, the fertilizer was supplied to the headland without planting seedlings due to the delay in stopping the fertilizer. In addition, when the planting clutch is engaged to start the planting run in the next stroke after finishing the direction change, conversely, the fertilizer flow to the groover is delayed with respect to the planting operation. Therefore, fertilization is not applied to the seedlings near the beginning of the planting strip.

Therefore, as a means for solving such a problem, for example, as disclosed in Japanese Patent Laid-Open No. 63-304915, a shutter for closing and urging is provided on the upper part of the grooving device and is connected to the shutter. The cam member acting on the cam follower is driven to rotate at a low speed by an electric motor,
There has been proposed one configured to open and close the shutter. According to this proposed structure, the cam follower connected to the shutter is received and supported by the large diameter part of the cam member during the planting operation to hold the shutter in the open position and rotate the cam member in conjunction with the stop of the planting operation. When the cam follower is started, the shutter is closed by rapidly dropping the cam follower from the large diameter portion to the small diameter portion in the step portion of the cam member, and the cam member is rapidly closed by the biasing force, and the cam member is rotated again in conjunction with the activation of the planting operation, By driving the cam follower from the small diameter part to the large diameter part at low speed, the shutter closes and the shutter is opened at a low speed against the biasing force, and the cam member stops when the cam follower reaches near the end of the large diameter part. Thus, the shutter can be held in the open position as described above. As a result, the shutter is closed rapidly in conjunction with the stop of the seedling planting device, the fertilizer flowing down the downflow route is received by the shutter, and the supply to the groover is stopped, and the seedling planting device is started. The shutter opens at a low speed in conjunction with, and the fertilizer received by the shutter gradually flows down into the groover. In other words, the seedlings near the beginning of the planting strip in the next stroke can be supplied with the surplus fertilizer that was delivered and temporarily held at the end of the previous stroke.

[0005]

However, in the above proposed structure, since the cam member that rotates at a low speed is used not only when the shutter is opened but also when the shutter is closed, the cam follower reaches the stepped portion of the cam member. It took some time, and the amount of fertilizer retained by the shutter tended to decrease. Of course, if the engagement length in the cam circumferential direction between the cam follower and the large diameter part of the cam member is set to be small, the time from when the cam member is activated until the cam follower reaches the stepped portion is shortened, and the fertilizer is stopped after planting is stopped. The time until the flow stops is shortened, and the amount of fertilizer that is received and retained by the shutter is also increased.However, if this engagement length is set too small, the cam will be delayed due to the delay in stopping the electric motor when the shutter is opened. If the member overruns, the cam follower reaches the step again and the shutter closes, causing a situation in which fertilizer is not supplied even though planting is in progress. In order to avoid rubbing, do not set the engagement length of the cam follower and the large diameter part of the cam member in the circumferential direction of the cam to some extent in anticipation of the overrun. Te is not must.

The present invention has been made by paying attention to such a point, and by improving the electric shutter opening / closing drive mechanism, the shutter is instantaneously closed in conjunction with the stop of the planting operation. In addition, by closing the shutter at the desired low speed at the start of the planting operation, it is possible to prevent the useless supply of fertilizer at the end of the planting process and prevent the shortage of fertilizer at the beginning of the next planting process. The purpose is to do.

[0007]

To achieve the above object, the present invention is characterized in that fertilizer is constructed so that a granular fertilizer fed from a hopper by a feeding mechanism is guided by a hose and fed down to a grooving device. The device is connected to the seedling planting device, the feeding mechanism and the planting mechanism are interlockingly connected, and a shutter for closing and urging is provided on the upper part of the grooving device, and this shutter is operated for high-speed closing operation and gentle opening operation. In a rice transplanter with a fertilizer application having an electric shutter opening / closing drive mechanism, the shutter opening / closing drive mechanism includes a lock member for holding the shutter urged to close in an open position, and forcibly moving the lock member to a release position. The electromagnetic solenoid, the cam member that closes the shutter and forcibly moves to the open posture against the biasing force, and this cam member is made at low speed. Lies in that is provided with an electric motor that.

[0008]

According to the above construction, when the shutter in the open position is closed, the electromagnetic solenoid operating at a very high speed forcibly moves the lock member to the release position. To be closed. Further, when the shutter in the closed position is opened, a cam member driven by an electric motor and operated at a predetermined low speed is used, and holding in the open position is performed by a dedicated lock with a lock operating position. Since the member is used, the error in the stop position of the cam member does not have any adverse effect on the opening posture of the shutter.

[0009]

Therefore, according to the present invention, by selecting the optimum electric actuator for controlling the closing operation of the shutter and an electric actuator for controlling the opening operation of the shutter, the shutter closing operation linked to the stop of the planting operation can be achieved. The operation can be performed instantaneously, and the shutter opening operation that is linked to the start of the planting operation can be performed at a desired low speed, thus reliably preventing the wasteful fertilizer supply at the end of the planting process, It became possible to reliably prevent a shortage of fertilizer at the beginning of the next planting process.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a riding type rice transplanter with a fertilizer application apparatus according to the present invention. This rice transplanter connects a seedling planting device 3 to a rear portion of a passenger traveling vehicle body 1 via a link mechanism 2 so as to be able to move up and down, and to the seedling planting device 3 to a fertilizer application device 4.
It has a structure equipped with.

As shown in FIG. 2, the seedling planting device 3
Is a square pipe-shaped main frame 5 connected to the rear end of the link mechanism 2, a planting transmission case 6 connected and supported by the main frame 5, and a plurality of seedlings W are placed and reciprocated left and right. Seedling stand 7, three planting cases 8 connected in parallel to the rear surface of the main frame 5 to receive power from the planting transmission cases 6, and a rotary planting mechanism 9 provided at the rear end of each planting case 4. It is composed of three ground leveling floats 10 and the like, which are located at the lower part of each planting case 8 and the like, and the fertilizer application device 4 is equipped at the rear part of the seedling planting device 3.

The fertilizer applicator 4 comprises a hopper 11 for storing powdered and granular fertilizer, a rotary roll type feeding mechanism 12 provided under the fertilizer, a grooving device 13 attached to each float 10 for each planting line, and a feeding mechanism. It is composed of a hose 14, etc., which guides the fertilizer fed out at 12 and guides it to the groove making device 13. Then, the feeding roll shaft 12a of the feeding mechanism 9 and the planting mechanism 9 are interlockingly coupled via a push-pull rod 15 and a gear mechanism 16 that perform an eccentric crank motion, and the starting and stopping of the planting mechanism 9 and the feeding mechanism 9 are performed. The start and stop are synchronized with each other. Therefore, when the planting clutch (not shown) interposed in the power transmission system from the passenger traveling vehicle body 1 to the planting transmission case 6 is inserted, the planting operation and the fertilizer feeding operation are started in synchronization, and when the planting clutch is disengaged, the planting operation is started. The fertilizer feeding operation is stopped synchronously.

Incidentally, the hopper 11 and the feeding mechanism 1
2 is supported so as to be able to move up and down along a guide rail 17, and is normally located at a lower position as shown in the drawing so that the feeding mechanism 12 and the hose 14 are connected for communication and the feeding mechanism 12 and the planting mechanism 9 are connected. It is linked with the rod,
When performing various operations such as taking out the seedling W remaining under the seedling stand 7, adjusting the planting mechanism 9, cleaning the inside of the hose 14, and the like, while separating the lower end of the feeding mechanism 12 and the hose 14, The rod connection between the feeding mechanism 12 and the planting mechanism 9 is released, and the hopper 11 and the feeding mechanism 1 are released.
By moving 2 upward, the lower rear part of the seedling stand 7 is largely opened so that various operations can be performed easily.

As shown in FIG. 3, a shutter 20 for opening and closing the fertilizer flow-down path is mounted in the upper part of each grooving device 13 so as to be vertically swingable around a fulcrum a, and from the shutter fulcrum shaft 20a. The projecting operation arm 20b is interlockingly connected to an electric shutter opening / closing drive mechanism 21 provided at a fixed portion of the seedling planting device 3 via a linkage rod 22. As shown in FIGS. 9 (a) to 9 (c), in each case of four-row planting, five-row planting, and six-row planting, the linkage rods 22 are provided one by one in float units, and It is interlockingly connected to a single shutter opening / closing drive mechanism 21 common to the shutters.

The shutter opening / closing drive mechanism 21 is constructed as follows.

An operating shaft 23, which is common to all the rows, is rotatably mounted on the lower portion of the main frame 5 so as to be rotatable about a horizontal axis b, and an operating arm 23a projecting from the operating shaft 23 is provided with a front end of each connecting rod 22. Are connected to each other, and the operating lever 23b extending from the operating shaft 23 is biased by the spring 24 to rotate the operating shaft 23 in the counterclockwise direction. Is closed, and the operating lever 23b is rotated clockwise against the spring 24, whereby all the linkage rods 22 are pulled forward and all shutters 20 are opened. .

An arm-shaped lock member 26 is loosely fitted and mounted on a rotary shaft 25 which is rotatably provided around a horizontal axis c in the front upper portion of the operating shaft 23, and a tip end portion of the lock member 26 is The tip end pin 23c of the operating lever 23b in the shutter open position (open) is engaged from above to prevent the operating lever 23b from being urged and rotated in the counterclockwise direction, so that all the shutters 20 are held in the open posture. It is like this.

The operating lever 26a integral with the lock member 26 and the electromagnetic solenoid 27 are interlockingly connected with each other through the interlocking metal fitting 28, and when the electromagnetic solenoid 27 is energized, as shown in FIG. Is moved to the left in the figure and the operation lever 26a is rotated counterclockwise, whereby the lock member 26 is driven and rocked upward, whereby the lock of the operating lever 23b is released, and all the shutters 20 are spring-loaded. The urging force of 24 instantly closes and operates.

As shown in FIGS. 6 and 8, the rotary shaft 25 has an electric motor 30 through a worm speed reduction mechanism 29.
Is connected to and is driven to rotate counterclockwise in the drawing at a low speed, and a cam member 31 for driving the shutter opening is fixed to the rotation shaft 25. Further, the rotary shaft 25 is
The cam member 31 is set to be driven one rotation at a time, with the position in which the cam member 31 is in the downward posture as an initial set position s.
When the cam member 31 rotates counterclockwise from the set position s, the operating lever 23b at the shutter closing position (closed) is forcedly rotated clockwise at a low speed due to abutting interference with the pin 31a, and the operating lever When the shutter 23b reaches the shutter open position (open), the lock member 26 is rotated downward by the spring 32 acting on the coupling fitting 28 to perform the lock operation.

As shown in the circuit diagram of FIG. 10, the electromagnetic solenoid 27 and the electric motor 30 of the shutter opening / closing drive mechanism 21 are a main clutch switch S1 which is switched as the main clutch of the passenger traveling vehicle body 1 is operated. , The planting clutch S that is switched according to the planting clutch operation
2 is linked and connected, and the operation is controlled as follows in cooperation with the operation of these clutches.

In the initial state in which both the main clutch and the planting clutch are disengaged, the operating lever 23b is in the shutter closed position (closed), and at this time, the normally open contact S1a of the main clutch switch S1 and the planting clutch switch S2 are normally closed. The open contacts S2a are both open. In addition, LS in FIG. 10 is a limit switch that is operated and opened when the cam member 31 is at the set position st.

When the power switch Sw is turned on, the electromagnetic solenoid 27 and the first relay R1 provided in the solenoid drive circuit z are energized for a fixed time set by the timer T, and the first relay contact R1a is closed. This makes the second
The relay R2 is energized and the second relay contact R2a is closed,
This relay drive circuit r is held by itself. The relay drive circuit r is provided with the third relay R3, and the bypass circuit y of the motor drive circuit x is established by closing the third relay contact R3a.

In this state, even when only one of the main clutch and the planting clutch is engaged and operated, the normally open contact S1
Only by closing either a or the normally open contact S2a, the shatter electric motor 30 is not energized and started.

When the main clutch and the planting clutch are both engaged and operated, the normally open contacts S1a and S2a are opened.
Are closed together and the electric motor 30 is energized and activated via the bypass circuit y, and operates as described above to operate all shutters 20.
Is driven to open and locked in the open position. That is, the shutter 20 is not opened until the planting traveling state is reached, and the fertilizer is supplied to the grooving device 13. By this operation, both the normally closed contact S1b of the main clutch switch S1 and the normally closed contact S2b of the planting clutch switch S2 are opened. Further, the electric motor 30 is energized to drive the cam member 31 out of the set position st to close and return the limit switch LS, and the fourth relay R4 provided in the motor drive circuit x is energized to turn on the fourth relay contact ( (Normally closed) R4b is opened, and the self-holding of the relay drive circuit r is released. As a result, the energization of the third relay R3 is stopped, the third relay contact R3a is opened, the bypass circuit y of the motor drive circuit x is not established, and the electric motor 30 is driven by the motor drive established by closing and returning the limit switch LS. Energization continues through circuit x. And
When the cam member 31 makes one rotation and returns to the set position st, the limit switch LS is pressed and the motor drive circuit x
And the electric motor 30 is stopped.

When the planting clutch is disengaged in order to change the direction of the machine at the ridge after one planting run has been completed, only the normally closed contact S2b of the planting clutch switch S2 is closed, which causes the electromagnetic solenoid 27 to actuate the timer T.
Then, the shutter 20 is instantly closed by the above-described lock release operation, and the fertilizer flowing down in the hose 14 is received by the shutter 20. Further, even when the main clutch is disengaged to stop seedling replenishment or the like and the traveling and planting operations are all stopped in the middle of the planting traveling, the normally closed contact S1 of the main clutch switch S1.
Only b is closed, the electromagnetic solenoid 27 is energized for a fixed time, the unlocking operation is performed, and all the shutters 20 are instantly closed.

Further, as the electromagnetic solenoid 27 is energized for a certain period of time, the relay drive circuit r is self-held as described above, and the third relay contact R3a is closed, whereby the bypass circuit y of the motor drive circuit x is changed. To establish. That is,
The next motor drive is ready.

When the vegetation clutch is turned on and operated to complete the vegetation traveling in the next stroke after completing the direction change of the vehicle at the ridge, all the shutters 20 are opened at a low speed because the energization condition of the electric motor 30 is satisfied. The fertilizer received by the shutter 20 gradually flows down into the grooving device 13. In other words, the seedlings near the beginning of the planting strip in the next stroke are supplied with the surplus fertilizer that was delivered and temporarily withheld at the end of the previous stroke.

Also, in the middle of the planting traveling, when the main clutch is disengaged to stop the traveling and planting operations to replenish the seedlings, the main clutch is operated again to return to the planting traveling, The fertilizer received by the shutter 20 gradually flows down into the grooving device 13, and the delay in the fertilizer supply at the early stage of recommencement of planting is alleviated.

Since the float 7 is pivotally connected to the rear end of the float support arm 32 whose vertical swing can be adjusted around the fulcrum d, the float 7 is adjusted to adjust the planting depth.
As you move up and down, a certain shutter open position (open)
The position of the shutter fulcrum shaft 20a changes back and forth with respect to the actuating arm 23a and the actuating lever 23b, which causes the shutter 20 to rotate relatively, but as shown in FIG. In order to obtain a shutter opening that does not prevent fertilizer from flowing even in the shallowest planted condition,
As shown in FIG. 5, in the deepest planted state in which the float 7 is fully raised, the shutter 20 is largely opened.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

[Figure 1] Overall side view of rice transplanter with fertilizer application

[Figure 2] Side view of the seedling planting device

FIG. 3 is a side view of a main part in a shutter open state at the time of shallowest planting.

FIG. 4 is a side view of a main portion of the shutter closed state at the time of the shallowest planting.

FIG. 5 is a side view of the shutter release state of the main part at the time of deepest planting.

FIG. 6 is a plan view of a shutter opening / closing drive mechanism.

FIG. 7 is a side view showing a state where the shutter opening / closing drive mechanism is in the middle of operation.

FIG. 8 is a side view showing a part of a shutter opening / closing drive mechanism.

FIG. 9 is a schematic plan view showing a linkage configuration corresponding to various models. (A) Application example to 4-row planting machine (b) Application example to 5-row planting machine (c) Application example to 6-row planting machine

FIG. 10 is an electric circuit diagram that controls the operation of the shutter opening / closing drive mechanism.

[Explanation of symbols]

 3 Seedling planting device 4 Fertilizer application device 9 Planting mechanism 11 Hopper 12 Feeding mechanism 14 Hose 20 Shutter 21 Shutter opening / closing drive mechanism 26 Lock member 27 Electromagnetic solenoid 30 Electric motor 31 Cam member

Claims (1)

[Claims] 1. A feeding mechanism (1) from a hopper (11).
The fertilizer application device (4) configured to guide the powdery granular fertilizer fed out by 2) by the hose (14) and supply it to the grooving device (13) is connected to the seedling planting device (3), and is fed out. The mechanism (12) and the planting mechanism (9) are interlockingly connected to each other, and a shutter (20) which is closed and biased is provided on the upper part of the grooving device (13).
In a rice transplanter with a fertilizer application, which is equipped with an electric shutter opening / closing drive mechanism (21) for performing high-speed closing operation and low-speed opening operation of (0), the shutter opening / closing drive mechanism (21) includes a shutter (20) biased to be closed. A lock member (26) that holds the lock member in the open position, an electromagnetic solenoid (27) that forcibly moves the lock member (26) to the release position, and a shutter (2
Fertilizer application characterized by comprising a cam member (31) for forcibly moving 0) against the biasing force to the open position and an electric motor (30) for actuating the cam member (31) at a low speed. Rice transplanter with device.