JPH0221765B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a driving mechanism for installing a grounding body that supports the aircraft at the rear of the self-propelled aircraft so that the planting depth can be maintained almost constant even if the mud depth changes. The seedling planting device is provided so as to be freely raised and lowered by the raising and lowering of the grounding body, and the seedling planting device is provided with a grounding float biased downward by a spring, and the grounding pressure of the float is Regarding a riding rice transplanter in which the operation part of the drive mechanism and the float are mechanically interlocked and connected so that the operation part of the drive mechanism and the float are approximately constant, the raising and lowering of the seedling planting device during planting can be easily operated and the operation level can be adjusted to a predetermined work level. To enable quick reset, to level the ground by a float with relatively high accuracy during turning, and to enable a mechanism for this purpose to have a simple structure by effectively utilizing the original structure.

Next, embodiments of the riding rice transplanter of the present invention will be described based on illustrative drawings.

As shown in FIG. 1, the rear part of a self-propelled aircraft is equipped with one traveling wheel 1 that can be driven and steered freely, and a driver seat 2, and supports the aircraft in cooperation with the wheels 1. A pair of left and right sliding ground rods 3, 3,
Seedling planting device 4 and the grounding rod 3 when traveling on the road
Instead, a pair of left and right rotating wheels 5, 5 are provided to support the machine body, and the machine is configured to transmit rotational power from the self-propelled machine body to the seedling planting device 4, so that four rows of seedlings can be planted as the machine moves. It is configured so that it can be done.

As shown in FIGS. 1 and 2, both the grounding rods 3, 3 are constructed so that they can be integrally driven up and down about the axis _P1 by a fluid pressure cylinder 6, By raising and lowering the seedling planting device 4, it is possible to reversely raise and lower the seedling planting device 4. On the other hand, as shown in FIG. 2 and FIG. A link 9a that is connected to the aircraft body by a pair of link mechanisms 8 and 9 so as to be able to rise and fall freely, and that swings around a support shaft 10 as the rear link mechanism 9 and the center float 7b of this link mechanism 9 move up and down. A first push/pull rod 11, a first swinging member 12, and a first interlocking fitting 1 are connected in sequence to the
3, second push/pull rod 14, second swing member 15,
A mechanical interlocking mechanism A consisting of a second interlocking fitting 16 and the like is interlockingly connected to the control valve V for the cylinder 6, and the first interlocking fitting 13 and the second interlocking fitting 13 are connected to each other.
A first spring 17 is interposed between the push and pull rod 14 to allow a certain amount of relative movement therebetween, and biases the center float 7b downward and moves the valve V to the grounding rod raised position. A second spring 18 is attached to each of the second push/pull rods to bias the mud even if the mud depth changes.
The ground pressure of the float 7b is increased by the first spring 17.
The control valve V is configured to be automatically operated within the range set by . Even if the mud depth changes,
The grounding rod 3 is automatically raised and lowered so that work can be carried out while maintaining the planting depth approximately constant.

As shown in FIGS. 2 and 3, a member 19 that locks the second spring 18 on the side opposite to the interlocking mechanism A side is configured to be able to swing freely around the support shaft 20. The other end of the push/pull rod operating fitting 22 is interlocked with the operating lever 21 which can be moved and fixed, and has a long hole at one end into which the second push/pull rod 14 is inserted. 19, it is possible to change the biasing force of the second spring 18 using the operation lever 21 and operate the control valve V, thereby making it possible to change and set the ground pressure of the center float 7b according to the hardness of the mud, and also to The planting device 4 is configured so that it can be manually raised and lowered. Further, as the grounding rod 3 reaches the upward stroke end, the first contact portion 23a of the sliding rod 23 presses the operated portion 14a of the second push/pull rod 14, and the grounding rod 3 As the end of the downward stroke is reached,
The second contact portion 23b of the rod 23 presses the operated portion 14a to close the control valve V.
is configured to be automatically operated to a neutral position.

As shown in FIGS. 2 to 4, a member 24 for forming an operating section for adjusting the biasing force of the second spring 18 is swingably attached to a support shaft 25, and an operating wire 26 is used to An operating lever 28 that can freely swing and fix the planting clutch 27
When the operating lever 28 is operated to the clutch release position, the operating portion forming member 2
4 swings in a direction that lowers the urging force of the second spring 18 than that set by the operating lever 21, and when the operating lever 28 is operated to the clutch engaged position, the operating portion forming member 24 is operated. The structure is such that the bending of the wire 26 causes the automatic swinging state, and the biasing force of the second spring 18 becomes the one set by the operating lever 21. In other words, the operating portion forming member 24 and the planting clutch 27 are mechanically interlocked and connected so that the biasing force of the second spring 18 is smaller when the clutch 27 is disengaged than when the clutch 27 is engaged. , At the time of planting, simply by disengaging the planting clutch 27, the set ground pressure of the center float 7b becomes lower than that during work, the grounding rod 3 is lowered relative to the aircraft, and the seedling planting device 4 is brought to the work level. Then, by simply engaging and operating the planting clutch 27, the set ground pressure of the center float 7b is restored during work, the grounding rod 3 is raised relative to the aircraft, and the seedling planting device 4 is reset to the working level. It is configured so that Furthermore, when the clutch is disengaged, the float 7 is constructed such that relative displacement between the interlocking mechanism A and the clutch-side interlocking structure is allowed due to elastic deformation of the second spring 18.
Consideration has been given to enable control valve V to be operated using b. That is, planting clutch 2
Even in the disconnected state of 7, the second spring 18 has a biasing force that biases the float 7b downward with a smaller biasing force than in the planted clutch engaged state, and the float 7b The ground leveling force is maintained almost constant due to the automatic elevation control of the grounding body, and the aircraft turns while the ground leveling action by the float 7b is exerted in a stable state with little change in acting force. It can be done.

Note that the cylinder 6 can be changed to a fluid pressure type or an electric motor, and these can be replaced by a drive mechanism 6.
, and the control valve V is referred to as the operating section V.
It is called.

Also, wheels can be used instead of the grounding rod 3, and these are collectively referred to as the grounding body 3.

In summary, in order to achieve the purpose described above, the riding rice transplanter according to the present invention is provided with an operating section for adjusting the biasing force of the spring, and the The operating portion and the planting clutch are mechanically interlocked and connected so that the biasing force of the spring is smaller in the cut state and the spring has a biasing force even in the cut state of the planting clutch. It has been done. The functions and effects thereof are as follows.

In other words, the float 7b is
The set ground pressure of the float 7b is automatically lowered from that for working, and the grounding body 3 is lowered relative to the aircraft during working, or the grounding setting of the float 7b is automatically restored to that for working, and the grounding body 3 is lowered for working. Since the aircraft is raised to the same level, the seedling planting device 4 can be raised and lowered as it turns with a simple operation that requires only a clutch operation. Furthermore, the raising and lowering of the seedling planting device is performed by automatic raising and lowering control of the grounding body 3, and even in the clutch disengaged state, the spring 18 has a biasing force so that the grounding body 3 does not descend too much.
In addition, since the float 7b is provided with a ground force for leveling the ground, it is possible to reliably prevent the seedling planting device 4 from being raised too high, and it is possible to quickly reset the seedling planting device 4 to the working level after turning. With becoming,
The float 7b can now turn while leveling the ground by exerting its ground leveling action in a stable state with little change in acting force. As a whole, the effort and time required for raising and lowering the seedling planting device as it rotates as well as for leveling the headland can be reduced, making it possible to improve work efficiency.

Furthermore, since the lifting and lowering structure of the seedling planting device 4 in conjunction with the clutch 27 utilizes the lifting and lowering structure of the grounding body 3 that is originally provided, furthermore, the clutch side interlocking mechanism is connected to the spring 18. do,
Since the spring 18 is also used as a spring for allowing relative movement between the float-side interlocking mechanism and the clutch-side interlocking mechanism, the overall structure can be simplified and constructed at low cost.

[Brief explanation of drawings]

The drawings illustrate embodiments of the riding rice transplanter according to the present invention; FIG. 1 is an overall side view, FIG. 2 is a side view of the grounding body lifting/lowering operation mechanism, and FIG. 3 is a plan view showing a part of the interlocking mechanism. FIG. 4 is a cross-sectional view taken along the - arrow in FIG. 3. 3... Grounding body, 4... Seedling planting device, 6... Drive mechanism, 7b... Float, 18... Spring,
24...Operation unit, 27...Clutch, V...Operation unit.

Claims (1)

[Claims] 1 Grounding body 3 that supports the aircraft at the rear of the self-propelled aircraft
is provided so that it can be raised and lowered by a drive mechanism 6, and the seedling planting device 4 is also provided so that it can be raised and lowered by raising and lowering the grounding body, and the seedling planting device is provided with a grounding float 7b.
The rice transplanter is provided in a state where it is biased downward by a spring 18, and the operating part V of the drive mechanism 6 and the float 7b are mechanically interlocked and connected so that the ground pressure of the float 7b is approximately constant. It is equipped with an operating section 24 for adjusting the biasing force of the spring 18, and a planting clutch 2.
The operating portion 24 and A riding rice transplanter that is mechanically interlocked with the planting clutch 27.