JPS6357005B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention makes it possible to maintain the vehicle body in a horizontal or almost horizontal posture with respect to the planting mud surface and to travel straight in a stable state regardless of variations in the level of the plow in the lateral direction of the vehicle body. A seedling planting device supported by a ground float is attached to the vehicle body so as to be able to roll freely, and an operating section of a drive mechanism that changes the relative level of the left and right running wheels of the vehicle body and the vehicle body or the seedling planting device are mechanically connected. The present invention relates to a rice transplanter configured to automatically change the relative level of the wheels in an interlocking manner to correct the rolling of the seedling planting device relative to the vehicle body.

In this type of vehicle, when driving on the road, in order to maintain a good balance in the left and right direction of the vehicle body,
This eliminates the level difference between the left and right wheels and returns the vehicle body to a horizontal position with respect to the ground, but conventionally, the operating section of the drive mechanism and the vehicle body or seedling planting device have generally been integrally connected. In order to operate the operation part to return to the posture, the seedling planting device must be rolled integrally with the vehicle body, which requires a large operating force, and the operation for returning to the posture is difficult. It had become extremely difficult to do. In addition, it is artificially determined whether the vehicle is in a horizontal position with respect to the ground, and even if the vehicle is tilted and the vehicle is tilted even when the vehicle is in a horizontal position relative to the ground, it is not possible to avoid situations where the vehicle becomes unstable. I was invited.

In view of the above points, the present invention provides, when driving on the road,
The purpose is to make it possible to reliably return the vehicle body to a horizontal position and to make the operation for that purpose easy.

Next, the present invention will be described in detail based on embodiments and drawings.

A grounding float 2 for leveling the planting area and ground support is provided at the front of the vehicle body, which is equipped with left and right wheels 1, 1 that can be raised and lowered, and a seedling platform 3 that moves back and forth in the lateral direction of the vehicle body is installed at the rear. Seedling planting device 4 that takes out a fixed amount of block seedlings and plants them in the rice field.
and ground floats 5, 5 for leveling the planting area and supporting the planting device 4 to the ground,
The rice transplanter is configured to continuously plant seedlings in the rice field as it travels.

a transmission case 6 that supports the left and right wheels 1, 1;
6 are connected to the swinging arm 7 via links 8, 8, and the swinging arm 7 is provided on the sliding bracket 9 so as to be rotatable around the vertical axis P, and the sliding bracket 9 and one link are connected to each other. 8, a first hydraulic cylinder 10 as an example of a drive mechanism is interposed, and the first
It is configured to change the relative level of the left and right wheels 1, 1 by operating the hydraulic cylinder 10,
The sliding bracket 9 is provided on the cylindrical transmission case 15 via a guide 12 so as to be slidable in the front-rear direction of the vehicle body, and the sliding bracket 9 is provided as an example of a drive mechanism between the sliding bracket 9 and the cylindrical transmission case 15. 2 hydraulic cylinder 13 and a buffer spring S ₁ are interposed, and as the second hydraulic cylinder 13 operates, the left and right wheels 1, 1 are integrally moved by the pressing force of the spring S ₁ and the ground reaction force of the wheels 1, 1. It is configured to be driven up and down.

A grounding float 2 on the front side of the vehicle body and a control valve V ₂ for the second hydraulic cylinder 13 are interlocked and connected via a link mechanism 14, and the left and right wheels 1, 1 are controlled based on the detection of the vertical displacement of the float 2 with respect to the vehicle body. are integrally driven up and down, and the level of the vehicle body relative to the planting mud surface is automatically maintained at a constant or almost constant level regardless of fluctuations in the level of the plow in the direction of travel of the vehicle body.

The cylindrical transmission case 15 covers a transmission system for transmitting power from the engine E to the planting transmission M.
is divided midway in its longitudinal direction, and
The rear case portion 15a is the front case portion 15.
The seedling planting device 4 is attached to b so as to be rotatable around the longitudinal axis Q in the longitudinal direction of the vehicle body.
A ground float 5 for supporting the float on the ground is configured to be rollable relative to the vehicle body. Said first
Control valve for hydraulic cylinder 10
V ₁ is provided on the front end side of the rear case portion 15a, and the spool 16 of the control valve V ₁ and the front case portion 15b are interlocked and connected.
Based on the rolling detection of the seedling planting device 4 relative to the vehicle body, the left and right wheels 1, 1 are raised and lowered relatively and contradictoryly to correct the rolling, and the vehicle body and seedlings are planted regardless of fluctuations in the plowing level in the lateral direction of the vehicle body. A control mechanism 17 is configured to automatically maintain both of the attachment devices 4 in a position parallel or substantially parallel to the planting mud surface.

A guide rod 19 protrudes from the sliding bracket 9 to slidably pass through the guide 12 and the bracket 18 protruding from the cylindrical transmission case 15.
The support member 20 is provided so as to be able to slide freely and to be biased away from the arm 7 via a spring 21, and the support member 20 is provided with a longitudinal axis centered on the support member 20.
A T-shaped arm 23 is provided so as to be able to freely rotate around P ₁ and to maintain a predetermined posture via a pair of springs 22, 22.
The character-shaped arm 23 and the spool 16 are interlocked and connected via release wires 24, 24 and a swinging member 25, and the support member 20 and the human operating tool 26 are linked via a release wire 27, so that the human operating tool With the swinging operation of 26, the support member 20 is forcibly approached to the sliding bracket 9, and the T-shaped arm 23
If there is a difference in the relative level between the left and right wheels 1, 1, the T-shaped arm 23 will be swung by the above-mentioned pressure contact, and the spool 16 will be operated accordingly. control valve _V1 is opened, and the first hydraulic cylinder 1
0 is automatically operated to eliminate the level difference between the left and right wheels 1, 1, and the horizontal posture automatic return mechanism 28 is configured so that the vehicle body is parallel or almost parallel to the ground when traveling on the road. It is configured so that it can be used.

The human operating tool 26 is configured to switch the return mechanism 28 between an active state and a non-active state by swinging along a guide groove 29, and is engaged with one end of the guide groove 29. A stop portion 30 is formed to securely lock the operating tool 26 in the operating state described above and maintain the vehicle body in an attitude parallel or substantially parallel to the ground.

In the figure, _S2 is a buffer spring for the bracket 18 of the support member 20.

In order to interlock and connect the spool 16 and the front case portion 15b, a connecting arm 33 has a recessed portion 32 that engages with the spool 16 on the free end side of an arm 31 that projects from the front case portion 15b.
is swingably provided, and a spring 34 is attached to the connecting arm 33 to bias it toward the disengagement side, and the arm 33 and the human operating tool 26
are interlocked and connected via the release wire 35, so that the mechanical interlock between the spool 16 and the vehicle body can be severed by the swinging operation of the manual operation tool 26, and accordingly, the return mechanism 28 is set to the operating state as described above. It is configured to switch to

The connecting arm 33 has inclined cam portions 36 on both left and right sides of the recessed portion 32 formed in the center thereof.
, and after the interlocking state with the spool 16 is once released, when one end of the spool 16 is engaged with the recessed part 32 again, the seedling planting device 4 rolls somewhat with respect to the vehicle body. However, the structure is such that the inclined cam portion 36 allows the engagement to occur without any problem.

Next, the operating state of the above embodiment will be explained.

(a) First, during normal seedling planting work in the field, the human operating tool 26 is operated in a non-operating state as shown by the solid line in FIG. 3. In this state, the connecting arm 33 resists the biasing force of the spring 34 and closes the control valve V ₁ as shown by the solid line in the figure.
The T-shaped arm 23 is positioned away from the swing arm 7 as shown by the solid line in the figure.

(b) In this state, the machine is moved forward to perform seedling planting work, but if the level of the tiller changes due to unevenness on the tiller surface, the machine body tilts, and the front case part 15b and the rear case portion 15a rotate relative to each other around an axis Q in the longitudinal direction of the vehicle body, and a connecting arm 33 attached to an arm 31 protruding from the front case portion 15b pushes the spool 16. Or pull operation to open control valve V ₁ and
The hydraulic cylinder 10 is operated to expand and contract, and the left and right wheels 1, 1 are operated to move up and down in opposite directions in the direction in which the vehicle body returns to the horizontal position. Furthermore, even if the seedling planting device 4 is tilted due to relatively large irregularities on the mud surface, relative rotation occurs between the front case portion 15b and the rear case portion 15a, which also causes The left and right wheels 1, 1 are moved up and down in a reverse manner, and the degree of inclination of the seedling planting device 4 is corrected in a direction that decreases.

(c) When exiting the field after finishing the planting work, or when moving to the next field, the manual operation lever 26 is placed in the operating state as shown by the imaginary line in FIG. If necessary, engage the locking portion 30. At this time, the connecting arm 33 is disengaged from the spool 16 as shown by the imaginary line in the figure, and the T-shaped arm 23 is pulled toward the swinging arm 7 as the indicating member 20 moves. It will be done.

Therefore, if there is no level difference between the left and right wheels 1, 1 and the swinging arm 7 is not tilted, as shown by the solid line in the same figure, the T-shaped arm 23 will also not be tilted, as shown by the imaginary line in the figure. swinging arm 7
The control valve V ₁ will not be operated in any way, but the left and right wheels 1 and 1 will be located parallel to the
When the swinging arm 7 is tilted around the vertical axis P due to a level difference between the two, the pulled T-shaped arm 23 is brought into contact with the swinging arm 7 and tilts around the vertical axis P1 _. It is rotated around and becomes tilted. Along with this, release wire 2
4, 24 and the swinging member 25 are operated, the spool 16 is pushed or pulled, and the control valve _V1 is opened to open the first hydraulic cylinder 10.
The operation is performed to eliminate the level difference between the left and right wheels 1, 1, that is, to eliminate the inclination of the swing arm 7, and as a result, the inclination of the T-shaped arm 23 is also eliminated, and the control valve _V1 is placed in a neutral state. becomes.

(d) In this state, there is no level difference between the left and right wheels 1, 1, and the seedling planting device 4 is also in a horizontal position, so the front case portion 15b and the rear side Case part 15
Prevent relative rotation with a and escape from the field.

(e) When entering the field again, enter the field while maintaining the state in (d) above, and then switch the human operating tool 26 to the non-operating state as shown by the solid line in Figure 3, and ), and perform seedling planting work.

The above-mentioned operating conditions are repeated in order to perform seedling planting work in the field and to drive on the road after leaving the field.

In the above embodiment, the spool 1 is used to connect the control valve V ₁ to the vehicle body and the swinging member 25.
Although it is connected to both ends of spool 16 itself,
A separate member may be provided at one end, and the vehicle body and the swinging member 25 may be linked to the separate member, and these are collectively referred to as the operating section 16.

Moreover, in the above embodiment, the control valve V ₁
Although it is provided in the rear case portion 15a of the seedling planting device 4 side and is interlocked with the vehicle body side, it may also be provided in the front case portion 15b and interlocked with the seedling planting device 4 side.

Furthermore, the switching operation for the return mechanism 28 and the operation for cutting off the interlock between the spool 16 and the front case portion 15b can be performed simultaneously with a single manual operating tool 26, simplifying both the operation and the configuration. However, each may be operated using a separate operating tool. Furthermore, focusing on the fact that the planting clutch lever is turned off when traveling on the road, the planting clutch lever may be used to perform both of the above-mentioned operations, and the manual operating tool 26 may be omitted.

In summary, the present invention provides the above-mentioned rice transplanter with the vehicle body or the seedling planting device 4 and the operation section 1.
An artificial operating tool 26 is provided to cut off the mechanical interlock with the wheels 1, and when a level difference is detected between the two wheels 1, 1, the drive mechanism 10 is operated to substantially eliminate the level difference. A feature is that the horizontal posture automatic return mechanism 28 is provided so as to be freely switchable between an active state and a non-active state using a human operating tool 26.

In other words, when traveling for planting work, the operating unit 16 and the vehicle body or the seedling planting device 4 are mechanically linked to automatically correct vehicle body rolling caused by fluctuations in the plowing platform level in the lateral direction of the vehicle body. This allows the vehicle body to maintain a horizontal or nearly horizontal posture with respect to the planting mud surface to allow for good work driving, while cutting off the mechanical interlock when driving on the road, allowing seedling planting to be carried out smoothly. Regardless of the attitude of the device 4 with respect to the vehicle body, the seedling planting device 4
The vehicle body can be returned to a horizontal position by operating only the drive mechanism 10 without performing a rolling operation, and the operation for returning to the position can be easily performed with a small operating force.

Moreover, since the return mechanism 28 is activated by manual operation, and the drive mechanism 10 is activated accordingly, the level difference between the left and right wheels 1, 1 is automatically eliminated, so that there is no need for human judgment when driving on the road. The vehicle body can be easily and reliably placed in a horizontal or almost horizontal position, and the vehicle can be driven with good left-right balance.

[Brief explanation of drawings]

The drawings show an embodiment of a rice transplanter according to the present invention, in which FIG. 1 is an overall side view, FIG. 2 is a partially omitted side view of the main part, and FIG. 3 is a partially developed plan view of the main part. DESCRIPTION OF SYMBOLS 1...Wheel, 4...Seedling planting device, 5...Grounding float, 10...Drive mechanism, 16...Operation unit, 2
6... Human operating tool, 28... Horizontal posture automatic return mechanism.

Claims (1)

[Claims] 1. A seedling planting device 4 supported by a grounding float 5 is attached to a vehicle body so as to be able to roll freely, and an operating section 16 of a drive mechanism 10 that changes the relative level of left and right running wheels 1, 1 of the vehicle body; Mechanically interlocking the vehicle body or the seedling planting device 4 to automatically change the relative level of the wheels 1 in order to correct the rolling of the seedling planting device 4 relative to the vehicle body. This rice transplanter is equipped with an artificial operating tool 26 for cutting off the mechanical linkage between the vehicle body or the seedling planting device 4 and the operating section 16, and also has a level difference between the two wheels 1, 1. A horizontal posture automatic return mechanism 28 that operates the drive mechanism 10 to substantially eliminate the level difference when detected is provided so as to be switchable between an active state and a non-active state by a human operating tool 26. Rice transplanter. 2. Both the operating tools 26 are configured to be used in combination, so that the mechanical interlock between the seedling planting device 4 and the operating section 16 is cut off when the automatic horizontal posture return mechanism 28 is in the operating state;
The rice transplanter according to claim 1, wherein the rice transplanter is configured to be connected when in a non-operating state.