JPH07121165B2 - Rice planting equipment for rice transplanters - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a planting claw drive mechanism for cutting out mat-like seedlings placed on a seedling stand that reciprocates laterally one by one and planting them in a field. And a seedling planting device for a rice transplanter equipped with a seedling feeding device for sending the mat-like seedling to the side of the planting claw driving mechanism, more specifically, placing the mat-like seedling on a seedling stand before starting work. Technology for doing.

[Conventional technology]

Taking a riding type rice transplanter as an example, since the seedling planting device is located in the rear part of the riding type rice transplanter, conventionally, when mat-like seedlings are placed on the placing table before starting work. In this case, the worker has sent the mat-shaped seedlings to the seedling stand from behind the seedling planting device.

That is, the seedling stand has a vertical feeding mechanism that sends a predetermined amount of seedling to the side of the planting claw drive mechanism each time the seedling stand reaches the reciprocating end, and that the remaining amount of seedling has decreased below the predetermined amount. Since a seedling remaining amount sensor that detects by contact with the seedling and a seedling holding rod for preventing floating of the seedlings are provided, for example, an operator who is located in the driving section can attach a mat from the top of the seedling stand. Even if the mat-shaped seedlings are placed on the seedling placing table by sliding the seedling seedlings, the seedlings cannot be sent to the lower end of the seedling placing table. The seedlings were placed on the seedling stand from behind.

[Problems to be Solved by the Invention]

However, when seedlings are placed from behind the seedling planting device in a weak field, there is room for improvement because the work is time-consuming because the legs are unstable.

Therefore, the vertical feed device continuously feeds the seedlings to the side of the planting claw drive mechanism while continuously feeding the seedlings to the side of the planting claw drive mechanism for a predetermined amount each time the seedling table reaches the reciprocating end. The operation can be switched to the feed state, and a switch that sets the working state of the vertical feed mechanism and a control device that controls the operation of the vertical feed mechanism based on the setting state of this switch are provided to start the work. Before placing the seedlings on the seedling stand, the operator slides the seedlings from the upper part of the seedling stand and switches the vertical feed mechanism to continuous feed mode by operating the switch while operating the operator. By
It may be possible to feed the seedlings from the top to the bottom of the seedling stand, but in this case, the vertical feeding device in the intermittent feeding state is unexpected due to malfunction of the switch during seedling planting work. By switching to the continuous feeding state, the seedlings that have already reached the lower end of the seedling stand may be pressed and deformed or damaged,
There is room for improvement because the deformation or damage may prevent normal seedling planting work.

An object of the present invention is to enable a worker to feed seedlings from the upper part to the lower end of the seedling stand before starting the work by rational modification before starting the work, and at the time of rice planting work. The point is to eliminate the risk of continuous feeding of unexpected seedlings.

[Means for Solving the Problems]

The characteristic structure of the present invention is a planting claw drive mechanism for cutting out one seedling of each mat-like seedling placed on a seedling placing table that reciprocates laterally and planting it in a field, and the mat-like seedling for the planting claw. In a seedling planting device of a rice transplanter equipped with a seedling feeding device for feeding to the drive mechanism side, the seedling feeding device is configured to drive the matting seedling with the planting claw each time the seedling stand reaches a reciprocating end. It is configured such that the operation can be switched between an intermittent feeding state in which a predetermined amount is fed to the mechanism side and a continuous feeding state in which the mat-shaped seedling is continuously fed to the planting claw driving mechanism side, and a reciprocating driving mechanism of the seedling placing table. And the drive of the planting pawl drive mechanism
A sensor mechanism for determining the setting state of the clutch mechanism for stopping, and when it is determined that the clutch mechanism is in the transmission state by this sensor mechanism, the seedling feeding device is switched to the intermittent feeding state, and, When it is determined by the sensor mechanism that the clutch mechanism is in the non-transmission state, regardless of the stop position of the seedling stand, a control means that allows the seedling feeding device to be switched to the continuous feeding state. The point is that it is provided.

[Work]

According to the present invention, when it is determined by the sensor mechanism that the clutch mechanism is in the non-transmission state, in other words, when the seedling planting work is not performed, the control means switches the seedling feeding device to the continuous feeding state. When the mat-like seedlings are placed on the seedling placing table before the work is started, the seedling feeding device can be switched to the continuous feeding state. The mat-shaped seedlings can be fed from the upper part to the lower end of the seedling placing table at a stable feeding speed by the continuous feeding operation of the seedling feeding device while being in the section. Further, when it is determined that the clutch mechanism by the sensor mechanism is in the transmission position, in other words, when seedling planting work is being performed, the control means automatically switches the seedling feeding device to the intermittent feeding state. Therefore, it becomes impossible to switch the seedling feeding device to the continuous feeding state during the seedling planting work. In other words, even if the operation of switching the seedling feeding device to the continuous feeding state is mistakenly performed during seedling planting work, the seedling feeding device does not unexpectedly switch to the continuous feeding state.

〔The invention's effect〕

Therefore, before starting the work, the mat-shaped seedlings can be sent from the upper part to the lower end of the seedling placing table by switching the seedling feeding device to the continuous feeding state. It is now possible to place seedlings.

Before placing the mat-shaped seedlings on the seedling placing table, the mat-like seedlings can be fed from the top to the bottom of the seedling placing table at a stable feeding speed by the continuous feeding operation of the seedling feeding device. Therefore, there is no inconvenience that the mat-shaped seedlings are compressed and deformed by the impact when reaching the lower end of the seedling stand due to the feeding speed of the mat-shaped seedlings becoming too fast.

Moreover, by modifying the seedling table reciprocating drive mechanism and the clutch mechanism for driving and stopping the planting claw drive mechanism to control the seedling feeding mechanism, erroneous operation during seedling planting work can be prevented. Even if it is done, the seedling feeding device will not switch to the continuous feeding state, so by unexpectedly switching the vertical feeding device to the continuous feeding state during seedling planting work, seedlings that have already reached the lower end of the seedling stand are seeded. It has become possible to eliminate the risk of being deformed or damaged by being pressed, and the risk of being unable to perform normal seedling planting work due to the deformation or damage.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 3, the engine (3) and the mission case (4) are arranged in the front part of the machine body (2) having the front and rear wheels (1), (1), and the center part of the machine body (2) is arranged. The driver's seat (5) and the steering handle (6) are arranged, and the seedling planting device (A) is installed at the rear end of the machine body (2) via a link mechanism (8) that is moved up and down by driving a hydraulic cylinder (7). Connected to form a riding type rice transplanter.

The seedling planting device (A) includes a transmission case (9) to which power from the traveling body (2) is transmitted, three chain cases (10) to which power from the transmission case (9) is transmitted, and these chain cases ( 10) A planting claw drive mechanism (11) having a rotating case (11a) and a planting arm (11b) provided on each side of each pair, and a chain case (10) arranged laterally on the upper surface of each. Sliding rail (12), which is instructed to be slidable laterally with respect to this sliding rail (12), and
A 6-row seedling stand (1) that reciprocates laterally by a moving force from a screw shaft (not shown) installed in the transmission case (9).
3) and three leveling floats (14), and a preliminary seedling replenishing device (B) is provided above the seedling stand (13).

Further, as shown in FIG. 1, the seedling stand (13) has a belt (15) with protrusions on the upper and lower wheels (15a) and (15b) for each row.
A vertical feed mechanism (15) formed by winding c) is provided, and a roller (16) for feeding seedlings is provided at the upper end of the seedling stand (13). Is provided with a feed mechanism (17) formed by winding a belt (17c) around front and rear wheels (17a) and (17b), and in this embodiment, a vertical feed mechanism (15), a roller (16), The feeding mechanism (17) is also referred to as a seedling feeding device (C), and these are driven synchronously by being interlocked and linked by an endless chain (18).

As shown in FIG. 1, the hexagonal shaft (19) supporting the lower wheel (15b) of the vertical feed mechanism (15) has a ratchet mechanism (2
The pinion gear (21) is externally fitted to the piston (2) via the rack portion (22a) that meshes with the pinion gear (21).
By driving the small single-acting cylinder (22) formed in 2b), the vertical feed mechanism (15), the roller (16), and the feed mechanism (17) operate.

The single-acting type cylinder (22) is reciprocated once every time the seedling placing table (13) reaches the lateral stroke end, and the mat-like seedling (W) is placed on the seedling placing table (13). In order to send the mat-shaped seedlings (W) to the seedling placing table (13) before the start of the work, while being configured to send a predetermined amount downward (on the side of the planting claw drive mechanism (11)). Used.

As shown in Fig. 1, a single-acting type cylinder (22) is provided for every two seedling planting rows, so that a total of three are provided, and each single-acting type cylinder (22) has a solenoid valve (23). Pressure oil is supplied via the solenoid valve, and the solenoid valve (23) is operated by a signal from a control device (24) (an example of control means).

Further, an elevating lever (25) for performing an elevating operation of the seedling planting device (A) is arranged on the side of the driver's seat (5),
The lifting lever (25) is linked to a planting clutch (26) (an example of a clutch mechanism) installed in the mission case (4) to drive and stop the seedling planting device (A), and FIG. At the operation position shown in (1), power is transmitted to the seedling planting device (A). Then, a discrimination switch (SWC) for discriminating the setting state of the planted clutch (26) (an example of a sensor mechanism)
Is provided.

As shown in FIG. 1, the control device (24) includes a signal from the determination switch (SWC) and a start switch (S).
Signal from WO), the signal from the first switch (SW1) that determines the presence or absence of seedlings on the roller based on the posture of the rocking agency (Y ₁ ), and the seedling of seedlings in the middle part of the vertical feed mechanism (15). The signal from the second switch (SW2) for determining the presence or absence is input, and in this seedling planting device (A), the first and second switches (SW) are input.
1), (SW2) the distance between the detection position of each mat-shaped seedling (W)
It is set to be a little larger than one sheet, and there is a space on the upper side of the first switch (SW1) where one mat-shaped seedling (W) can be placed. By placing (W), the first switch (SW1)
Is turned on.

This space is referred to as a mat seedling (W) replenishment position, and before starting the work, the control device is provided only when the disengagement switch (SWC) detects the disengaged state of the planting clutch (26). By the operation of (24), the mat-like seedlings (W) can be fed from the upper part of the seedling stand (13).

That is, as shown in FIG. 2 (a), the start switch (SW) is pressed while the mat-shaped seedlings (W) are placed at the supply position.
When O) is turned ON, the stand-alone cylinder (22) is intermittently operated to continue feeding seedlings.

Next, as a result of this feeding operation, when the mat-shaped seedlings (W) reach the position where the first switch (SW1) is switched to the OFF state as shown in Fig. 2 (b), the feeding operation is stopped and the feeding position is reached. Wait for the seedlings to be placed on the mat-shaped seedlings (W) at the supply position.
Is artificially placed, the first switch (SW1) detects the placement of the seedling, and the control device (24) operates the seedling feeding device (C) again.

Next, as shown in FIG.
When the switch (SW2) is turned on, the feeding operation is temporarily stopped, and the operator turns on the start switch (SWO) again, so that the control device (24) causes the mat-shaped seedling (W).
The single-acting cylinder (22) is intermittently operated a preset number of times so as to feed seedlings a distance (D) between the lower end position of the seedlings and the lower end position of the seedling stand (13). The feeding of seedlings is stopped as shown in ().

To explain the outline of the preliminary seedling supply device (B), as shown in FIG. 3, the mat-like seedlings (W) placed on the seedling scooping plate (27) are stored in the supply position, As shown in Fig. 4, the seedling scooping plate (27) has a feeding mechanism (17).
The opening (27a) through which the belt (17c) is inserted is formed.

Further, in the middle step portion, a first swinging member (28) that is swingably supported around a lateral axis (P ₁ ) and the first swinging member (2
The second swinging member (30), which is provided with a first solenoid (29) for restricting and releasing the swinging of 8) and is swingably supported around the lateral axis (P ₂ ) in the upper stage portion. And a second solenoid (3) for restricting and releasing the swing of the second swing member (30).
1) and are provided, and in the middle of the work, Fig. 2 (e)
As shown in, when the seedlings are completely sent out from the replenishment position and the first switch (SW1) reaches the OFF state, the first solenoid (29) is operated to swing the first swing member (28) downward. Then, the mat-like seedlings (W) from the first swinging member (28) are sent out without forming a gap between the seedlings, and the mat-like seedlings from the first swinging member (28). (W)
Is completely sent out, and the first switch (SW
Even when 1) reaches the OFF state, the mat-shaped seedlings (W) can be sent out from the second swing member (30).

Incidentally, the control system is configured so that the two solenoids (29) and (31) of the preliminary seedling replenishing device (B) are activated only when the planting clutch (26) is engaged. (Not mentioned).

Also, in this rice transplanter, a hydraulic system is formed as shown in FIG. 1, and pressure oil from the hydraulic pump (32) passes through the steering cylinder (33) through the control valve (34) to the solenoid valve (2).
3) and control valve (35) for raising and lowering the seedling planting device (A)
To the single-acting cylinders (22), (2
Shutoff valves (36) in the three oil passages for 2) and (22) respectively
Even if the number of planting work is changed, the number of seedling feeding lines can be changed in response to this change.

[Another embodiment]

In addition to the above embodiments, the present invention may be configured such that the seedling feeding device (C) is composed of a large number of rollers, and the actuator for operating the seedling feeding device (C) may be formed by an electric motor, a hydraulic motor or the like. Moreover, a microprocessor can be used for the control device (24), or various combinations such as a combination of a logic gate and a comparator can be implemented.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a seedling planting device of a rice transplanter according to the present invention, and FIG. 1 is a diagram showing a control system of the seedling feeding device, and FIGS. 2 (a), (b), (c), (d). ) Is a side view continuously showing the seedling feeding operation before the start of work, FIG. 2 (e) is a side view showing the seedling replenishing operation during the work, FIG. 3 is a side view of the rear part of the rice transplanter, and FIG. FIG. 4 is a plan view of a seedling scoop plate. (11) …… Planting claw drive mechanism, (13) …… Seedling stand, (2
4) ... Control means, (26) ... Clutch mechanism, (C) ...
… Seedling feeder, (W) …… Matte seedling, (SWC)… Sensor mechanism.

Claims (1)

[Claims] 1. A planting claw drive mechanism (11) for cutting out one by one a mat-like seedling (W) placed on a seedling stand (13) that reciprocates laterally and planting it in a field, and the mat. A seedling planting device of a rice transplanter comprising a seedling feeding device (C) for feeding the seedling-shaped seedling (W) to the side of the planting claw drive mechanism (11), wherein the seedling feeding device (C) is Every time the seedling stand (13) reaches the reciprocating end, the mat-like seedling (W) is intermittently fed to the side of the planting claw drive groove (11) by a predetermined amount, and the mat-like seedling (W). ) Can be switched to a continuous feed state in which it is continuously fed to the side of the planting claw drive mechanism (11), and the reciprocating drive mechanism of the seedling placing table (13) and the planting claw drive mechanism are provided. Clutch mechanism (26) for driving and stopping (11)
Of the sensor mechanism (SWC) for determining the setting state of the seedling feeding device (C) and the clutch mechanism (26) is determined to be in the transmission state by the sensor mechanism (SWC).
To the intermittent feed state, and when the sensor mechanism (SWC) determines that the clutch mechanism (26) is in the non-transmission state, regardless of the stop position of the seedling stand (13). , A seedling planting device for a rice transplanter, which is provided with a control means (24) for allowing the seedling feeder (C) to be switched to the continuous feeding state.