JP2002191209A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter designed to make the whole length thereof shorter in the condition of putting a seedling planting device to changeover to a housing posture. SOLUTION: This rice transplanter has such a construction that a seedling planting device 2 is linked in a vertically movable manner via a link mechanism 3 to the rear portion of the sulky self-propelled main machine 1, and there is provided an actuator 4 functioning to vertically move the seedling planting device 2; wherein the seedling planting device 2 is designed to be switchable between a working posture spread left and right so as to be capable of making a seedling planting operation and a housing posture with its lateral width contracted by a swing motion about a longitudinal axis at a transversely midway point and to be liftable, in its housing posture, to a housing position close to a point just above the axle 8a of the rear wheel 8 of the self-propelled main machine 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a riding type self-propelled machine, in which a seedling planting device is connected to a rear portion of the self-propelled machine via a link mechanism so as to be able to move up and down, and an actuator for moving the seedling planting device up and down is provided. The seedling planting device is configured so that it can be freely switched between a working posture in which the seedling planting work can be deployed to the left and right and a storage posture in which the left and right widths are reduced, by swinging about a vertical axis between the left and right. About the machine.

[0002]

2. Description of the Related Art In this type of rice transplanter, the lateral width of the seedling planting device is reduced by switching the seedling planting device to a retracted position, so that trucks can be loaded on a cargo bed or stored in a barn on the left and right width surfaces. There is an advantage that can be performed conveniently.

[0003] Conventionally, the seedling transplanting device which is raised to the storage position above the axle of the self-propelled machine and is switched to the storage position has been stored.

[0004]

However, according to the above-described conventional technique, even if the seedling planting device whose front and rear length has been increased by being switched to the storage position is raised to the storage position, the self-propelled machine does not move. It protruded greatly backwards, increasing the overall length of the rice transplanter, making it inconvenient to load it on a truck bed or store it in a barn.

[0005] An object of the present invention is to shorten the total length of the planting apparatus in a state where the apparatus is switched to the storage position.

[0006]

The features, functions and effects of the rice transplanter according to the present invention are as follows.

[Characteristics] A seedling planting device is connected to the rear portion of a riding type self-propelled machine via a link mechanism so as to be able to move up and down, and an actuator is provided for moving the seedling planting device up and down. A rice transplanter configured to be freely switchable between a working posture capable of expanding seedling planting work left and right and a storage posture having a reduced left-right width by swinging around a vertical axis between the left and right sides, The present invention is characterized in that the seedling planting device is configured to be able to ascend to a storage position near the axle of the rear wheel of the self-propelled machine in the storage posture.

[0008] [Operation] Since the seedling planting device in the stowed posture in which the front-rear length is longer is raised to the stowed position near the rear wheel just above the axle, the seedling planting device is switched to the stowed posture. Thus, the length of the seedling plant that has been raised to the retracted position from the self-propelled main unit to the rear can be shortened while the front and rear length is long.

[Effect] Therefore, while adopting the type of folding the seedling planting apparatus in the storage position, the overall length of the rice transplanter at the time of storage can be shortened, and the rice transplanter can be mounted on a truck bed and stored in a barn. It has become possible to do it in the full length.

The features, functions and effects of the rice transplanter according to the second aspect of the present invention are as follows.

[Features] In the rice transplanter according to the first aspect of the present invention, the upper limit position of the seedling planting device in the working posture is set lower than the upper limit position of the seedling planting device in the storage posture. On the point.

[Operation] The time required for raising and lowering the seedling planting device accompanying turning on the headland when the seedling planting device is switched to the working posture is compared with the case where the time is raised to the upper limit position for storage. Can be shortened.

[Effect] Accordingly, it is possible to maintain good turning performance on the headland with the raising and lowering of the seedling planting apparatus, while shortening the total length at the time of storage.

The features, functions and effects of the rice transplanter according to the third aspect of the present invention are as follows.

[Features] In the rice transplanter according to the first and second aspects of the present invention, the link mechanism is a quadruple link mechanism having a top link and a lower link, and the seedling planting device is The point is that it is configured to rise to the storage position by changing the link length.

[Action] By shortening the top link, lengthening the lower link, or shortening the top link and lengthening the lower link, the seedling planting apparatus, which has been further switched to the storage position, can be moved forward. Can be located.

[Effect] Therefore, the overall length can be further reduced.

The features, functions and effects of the rice transplanter according to the present invention according to claim 4 are as follows.

[Features] In the rice transplanter according to the third aspect of the present invention, the seedling planting device is configured to rise to the storage position by shortening the top link.

[Operation] By shortening the top link, the seedling-planting apparatus, which has been switched to the storage position, can be positioned further forward.

[Effect] Accordingly, the overall length can be further reduced.

The features, functions and effects of the rice transplanter according to the fifth aspect of the present invention are as follows.

[Characteristic] In the rice transplanter according to the third aspect of the present invention, the seedling planting device is configured to rise to the storage position by extending the lower link.

[Operation] By increasing the length of the lower link, the seedling planting apparatus, which has been switched to the storage position, can be further positioned forward.

[Effect] Therefore, the overall length can be further reduced.

The features, functions and effects of the rice transplanter according to the present invention are as follows.

[Features] The above claim 1 or 2, 3, 4, 5
In the rice transplanter according to the present invention, when the seedling planting device is located at or near the stowed position, the seedling clutch is interposed in a transmission system from the self-propelled machine to the seedling planting device. The point is that drive restraint means for restraining operation is provided.

[Operation] When the seedling planting device is located at or near the stowed position, the transmission mechanism from the self-propelled machine to the seedling planting device is largely bent. The transmission shaft may be deformed or damaged. Focusing on this point, by providing drive restraint means,
When the seedling planting device is in the raised position at or near the storage position described above, the on-coming operation and on-coming operation of the planting clutch are suppressed so that the planting clutch is not engaged, so that the universal joint and the transmission shaft Can be prevented from being deformed or damaged.

[Effect] Therefore, by adopting a structure capable of raising the seedling planting device at a high level, as described above, the overall length is shortened, but the transmission system is prevented from being deformed or damaged due to the shortening. Now you can.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a rice transplanter is provided with an eight-row seedling planting device 2 at the rear of a riding type self-propelled machine 1 via a four-link mechanism 3 so as to be movable up and down. And a hydraulic cylinder 4 as an actuator for raising the seedling planting device 2 with the supply of pressurized oil and lowering the seedling planting device 2 by its own weight with the drainage of oil.

The self-propelled machine 1 has an engine 5 at the front and a driver's seat 6 at the rear, and a pair of left and right driving front wheels 7 and a pair of right and left driving rear wheels 8. A power take-out shaft 9 for the seedling planting device 2; The power take-out shaft 9 and the input shaft 10 of the seedling planting apparatus 2 are linked at one end to the power take-out shaft 9 via a universal joint 11 and at the other end to the input shaft 10 via a universal joint 12.
And the transmission shaft 13 interlocked with the transmission shaft 13.
That is, power is transmitted to the seedling planting apparatus 2 regardless of whether the seedling planting apparatus 2 is moved up and down in the elevating area for planting work.

As shown in FIGS. 2 to 5, the seedling planting apparatus 2 includes a seedling stand 14 on which eight rows of seedlings are placed and reciprocated with a set stroke in the left-right direction. A sliding rail 16 that supports the lower end of the table 14 slidably in the left-right direction and forms a seedling outlet 15 at intervals of the set stroke, and a paddy field to be planted by sliding on the paddy field during traveling. The seedlings are placed by circulating the planting claws 18 between the seedling outlet 15 and the leveling paddle surface in conjunction with the movement of the plurality of (four) left and right ground floats 17 for leveling the soil, and the movement of the seedling rest 14. The plant is provided with eight planting mechanisms 19 for taking out a unit amount of planting seedlings from the table 14 and planting the seedlings on a leveling paddy field.

The seedling plant 2 is shown in FIGS.
As shown in the figure, it is divided into two parts on the left and right, and by swinging around the vertical axis in the middle of the left and right, the working posture that can be expanded to the left and right and the back of the divided seedling rest part It is configured to be switchable to a storage posture in which the left and right widths are reduced in a state of facing each other. More specifically, in a state in which the left and right divided portions of the seedling planting apparatus 2 in the working posture are disconnected, the divided seedling rests are moved to both left and right ends, and the divided portions are swung in this state, so that the retracted posture is obtained. Is switched and fixed. Note that the left and right center of the grounding float 17 belongs to one divided portion.

The four-link mechanism 3 includes a top link 2
0 and a lower link 21, and the hydraulic cylinder 4 swings up and down the four-link mechanism 3 by acting on an arm 22 swinging integrally with the top link 20.

In the rice transplanter, as shown in FIG.
By raising and swinging the entire four-link mechanism 3,
When the seedling planting device 2 is in the retracted position, the drive rear wheel 8
Is configured to be able to ascend to a storage position near immediately above axle 8a.

In this rice transplanter, FIG.
As shown in (b), the upper limit position of the seedling planting apparatus 2 in the storage posture, that is, the upper limit position of the seedling planting apparatus 2 in the working posture is set lower than the storage position. As shown in FIG. 8, the setting means includes a potentiometer 23 for detecting the height of the seedling placement device 2 relative to the self-propelled main unit based on the swinging posture of the lower link 21 relative to the self-propelled main unit. A posture sensor 24 for detecting the posture of the attachment device 2 is provided. When the posture sensor 24 detects the working posture, it is detected by the potentiometer 23 that the seedling planting device 2 has risen to the upper limit position. At this time, while the control valve 25 for the hydraulic cylinder 4 is switched to the raising / lowering stopped state, if the posture sensor 24 detects the storage posture, the potentiometer 23 detects that the seedling planting device 2 has risen to the storage position. The lifting / lowering control means 2 using a microprocessor, which switches the control valve 25 to a lifting / lowering stop state
6 is provided.

In the rice transplanter, when it is detected by the potentiometer 23 that the seedling planting device 2 is located at or near the storage position, the planting plant interposed in the transmission system to the power take-out shaft 9 is used. When the seedling planting device 2 is located at or near the stowed position when the drive restraining means A for restraining the engaging operation of the attaching clutch 27 is provided, even if the planting clutch 27 is engaged, the planting clutch 27 remains in the closed position. It does not enter and operate.

[Alternative Embodiment] In the above embodiment, the seedling planting apparatus 2 is in the retracted position by swinging up and down of the four-link mechanism 3.
Is raised to the storage position. As shown in FIG. 9, a shortening hydraulic cylinder 28 for shortening the top link 20 is incorporated in the top link 20 of the four-link mechanism 3, as shown in FIG. By raising and lowering the seedling planting device 2 in the storage posture by swinging up and down, the top link 20 is shortened in that state, so that the seedling planting device 2 is moved around the pivotal connection point with the lower link 21. The seedling planting apparatus 2 may be lifted and rocked upward and forward to the storage position.

In the above embodiment, the seedling planting device 2 in the storage position is raised to the storage position by swinging up and down of the four-link mechanism 3, but as shown in FIG. This lower link 2 is connected to the lower link 21 of the mechanism 3.
Incorporate an extension hydraulic cylinder 29 that extends
By swinging up and down the link mechanism 3, the seedling planting device 2 in the storage position is raised to a position near the storage position, and the lower link 21 is extended in this state, so that the seedling planting device 2 is pivoted with the top link 20. The seedling planting apparatus 2 may be raised to the storage position by being swung upward and forward around the support connection point.

The above two different embodiments may be implemented in combination.

[Brief description of the drawings]

FIG. 1 is a side view

FIG. 2 is a schematic plan view showing a storing process.

FIG. 3 is a schematic plan view showing a storing process.

FIG. 4 is a schematic plan view showing a storing process.

FIG. 5 is a schematic plan view in a retracted posture.

FIG. 6 is a side view of a main part in a state where the seedling planting device in the storage position is raised to the storage position.

FIG. 7 is a schematic side view of a main part in a state where the seedling planting device in a working posture is raised, and a schematic side view of a main part in a state where the seedling planting device in a storage posture is raised to a storage position.

FIG. 8 is a control block diagram.

FIG. 9 is a side view of a main part in a state where the seedling planting device in a storage position according to another embodiment is raised to a storage position.

FIG. 10 is a side view of a main part of the seedling planting device in a storage posture according to another embodiment in a state where the device is raised to a storage position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-propelled main machine 2 Seedling planting device 3 Link mechanism 4 Actuator 8 Rear wheel 8a Axle 20 Top link 21 Lower link 27 Planting clutch A Drive restraining means

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroaki Kitai 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory (72) Inventor Kaori 64 Ishizu-Kitamachi, Sakai City, Osaka Prefecture Kubota Sakai Manufacturing Co., Ltd. On-site F term (reference) 2B041 AA06 AB05 AC06 BA08 2B062 AA20 AB01 BA13 BA18 BA62 CA05 CA16 CA25 CB04 2B064 AA05 AA07 BA10 2B304 KA08 LA02 LA09 LB05 LB16 MA02 MC13 PC15

Claims (6)

[Claims] 1. A seedling planting device is connected to a rear part of a riding type self-propelled machine via a link mechanism so as to be able to move up and down, and an actuator is provided for moving the seedling planting device up and down.
A rice transplanter that is configured to be freely switchable between a working posture in which seedling planting work can be deployed to the left and right and a storage posture in which the left and right widths are reduced by swinging around a vertical shaft center between the left and right sides. A rice transplanter, wherein the seedling planting device is configured to be able to ascend to a storage position near the axle of the rear wheel of the self-propelled machine in the storage posture. 2. The rice transplanter according to claim 1, wherein an upper limit position of the seedling planting device in the working posture is set lower than an upper limit position of the seedling planting device in the storage posture. 3. The link mechanism is a quadruple link mechanism having a top link and a lower link, wherein the seedling planting device is moved up to a storage position by changing a link length. The rice transplanter according to claim 1 or 2, which is configured. 4. The rice transplanter according to claim 3, wherein the seedling planting device is configured to rise to a storage position by shortening the top link. 5. The rice transplanter according to claim 3, wherein the seedling planting device is configured to rise to a storage position by extending the lower link. 6. When the seedling planting device is located at or near the stowed position, the engaging operation of a planting clutch interposed in a transmission system from the self-propelled machine to the seedling planting device is suppressed. The rice transplanter according to any one of claims 1 to 5, further comprising a driving restraint means.