JPH11127632A - Paddy working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paddy working machine so designed that a ground leveling implement is disposed behind a ground working device and a means for vertically moving the implement over the range between a ground leveling-acting position in ground contact lying bellow and a raised shelter position above the ground is provided so as to ensure the ground leveling of wheel traces by the aid of the implement. SOLUTION: This paddy working machine which is so designed that a ground working device 2 is connected to the rear portion of a traveling machine body 1 capable of free lifting operation and equipped with a ground leveling implement 20 intended for ground leveling of the wheel traces due to the traveling machine body 1; wherein the ground leveling implement 20 is disposed behind the ground working device 2 and a means for vertically moving the implement over the range between a ground leveling-acting position in ground contact lying below and a raised shelter position above the ground is provided. The above means is pref. one supporting the ground leveling implement so as to be capable of free rolling motion, being further pref. one provided with a pair of left and right support arms 21 supporting the ground leveling implement 20 in such a mode as to be disposed on the left and right outsides of the ground working device 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paddy field working machine such as a riding type rice transplanter in which a seedling planting device is connected to a rear portion of the riding type self-propelling machine so as to be able to move up and down. And a paddy field working device such as a seedling planting device is movably connected to a rear portion of the traveling body so as to be able to move up and down freely, and a leveling tool for leveling wheel marks of the traveling body is provided.

[0002]

2. Description of the Related Art A paddy field working machine of this type, when turning on a headland with a paddy field working device raised, performs leveling with a leveling tool so as to erase wheel marks of a traveling machine body, thereby making it possible to control It was developed for the purpose of eliminating and simplifying the leveling by manual work.

[0003] As such a paddy field working machine, a riding type rice transplanter in which a grading implement is arranged at the rear of a traveling machine body and at the front of a paddy field working device is conventionally known.

[0004]

However, in the case of the above-mentioned conventional technique, since the wheel marks are to be leveled immediately after the wheel marks have been formed on the mud surface, it is difficult to perform a reliable leveling of the wheel marks. . In other words, when the wheel mark is formed on the mud surface, the mud flows into the wheel mark immediately after that, and natural backfilling is started. However, as in the above-described conventional technology, the wheel mark is formed on the mud surface. Performing the leveling immediately after it is done is to level the large wheel mark immediately after the natural backfill with mud has started, so it is difficult to reliably erase the wheel mark with the leveling tool .

An object of the present invention is to ensure the leveling of wheel marks by a leveling tool.

[0006]

The features, functions and effects of the first aspect of the present invention are as follows.

[Characteristics] A paddy field working machine in which a ground working device is movably connected to a rear portion of a traveling body so as to be able to move up and down, and a leveling tool for leveling wheel marks of the traveling body is provided. It is located behind the working device, and is provided with elevating means for elevating and lowering the ground-fixing device to a ground-setting operation position where the ground-fixing device touches the ground and a retreat position where the ground is raised.

[0008] According to the first aspect of the present invention, since the ground adjuster is disposed behind the ground working device, after a lapse of time from the time when the wheel mark is formed, that is, the mud on the wheel mark is removed. After the pouring is performed for a while, or after the pouring is completed and the wheel marks are reduced, the leveling tool will perform a leveling action on the wheel tracks, and the backfill amount of the wheel marks required for the leveling tool will be reduced, In addition, the leveling implement acts as a rear guard for the ground working device.

In addition, while the grading device is arranged behind the ground work device, the grading device is moved up and down to the terrain operation position and the retreat position by the lifting / lowering means. By raising it to
It is possible to prevent the work marks from interfering with the work implement.

[Effects] Therefore, according to the first aspect of the present invention, it is possible to ensure the leveling of the wheel traces while maintaining the desired paddy workability.

According to the second aspect of the present invention, the features, functions,
The effects are as follows.

[Features] In the features of the first invention,
The elevating means is a means for supporting the grading implement in a freely rolling manner.

According to the second aspect of the present invention, when there is a difference in the ground reaction force acting on the left and right of the leveling implement due to the rolling of the traveling body or the left and right inclination of the mud surface on the headland, The leveling gear rolls due to the difference in force, and the leveling gear is maintained in a posture parallel to the mud surface.Therefore, regardless of rolling of the traveling aircraft or left-right inclination of the mud surface at the headland, While the left and right ends are excessively protruding into the mud surface, it is necessary to prevent the ground pressure at the opposite end from becoming too low, and consequently prevent the mud surface from being disturbed by the ground preparation. And the leveling action of the leveling tool can be maintained satisfactorily.

[Effects] Therefore, according to the second aspect of the present invention, it is possible to perform the leveling for eliminating the wheel marks without disturbing the mud surface, regardless of the rolling of the traveling machine body and the left and right inclination of the mud surface.

According to the third aspect of the present invention, the features, functions,
The effects are as follows.

[Features] In the features of the first and second aspects of the present invention, the lifting means includes a pair of left and right support arms for supporting the leveling implement in a state of being disposed on the left and right outer sides of the ground working device. It is in the point that is.

[Operation] In the third aspect of the present invention, a pair of left and right support arms forming the lifting / lowering means are arranged on the left and right outer sides of the ground working device. Acts as a guard.

[Effects] Therefore, according to the third aspect of the present invention, the left and right ends of the ground working device may come into contact with or collide with other objects while simplifying the structure by sharing the members. Deformation and damage can now be prevented.

According to the fourth aspect of the present invention, the features, functions,
The effects are as follows.

[Features] In the features of the first invention, the second invention, and the third invention, the elevating means is means for allowing the ground work device to support the leveling implement so as to be able to move up and down. Is a means capable of fixing the grading implement to the grading action position in a state where the terrain is raised.

[Operation] According to the fourth aspect of the present invention, the ground work device is raised and the ground leveler is fixed at the leveling operation position, and then the ground work device is lowered by its own weight to reduce the weight of the ground work device. Since the ground adjuster is made to contact the ground while acting on the ground adjuster, the ground adjuster can be pressed against the mud surface without any special mechanism, and the ground can be leveled.

[Effects] Therefore, according to the fourth aspect of the present invention, it is possible to press the ground-fixing implement for the ground preparation against the mud surface with a simple structure and at low cost.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A riding type rice transplanter, which is an example of a paddy field working machine, has a ground working device mounted on a rear part of a riding type self-propelled body 1 which is a traveling body, as shown in FIGS. Is connected to the link mechanism 3 and the hydraulic cylinder 4
And operatively connected to each other via a wheel, and provided with a wheel mark erasing means.

The self-propelled body 1 is constructed by mounting an engine 8 and a boarding operation section 9 on a body frame 7 having a pair of left and right driving front wheels 5 for steering and a pair of right and left driving rear wheels 6. I have. The drive front wheels 5 are supported on the body frame 7 via a traveling / planting transmission case 10, and the drive rear wheels 6 are supported on the machine frame 7 via an axle case 11. The boarding driver 9 includes a steering wheel 12 for steering the drive front wheel 5 and a driver seat 1.
3 is provided.

The seedling planting apparatus 2 is provided with a planting frame 14 which can be moved up and down via the link mechanism 3 and the hydraulic cylinder 4, and a seedling stand 15 which is driven to reciprocate by a set stroke in the left-right direction; By operating in conjunction with the movement of the seedling rest 15, a unit amount of seedlings to be planted is taken out from a seedling outlet 17 formed on a slide rail 16 slidably supporting the lower end of the seedling rest 15. It is constructed by assembling a rotary seedling planting mechanism 18 for planting on the mud surface to be planted and a grounding float 19 for leveling the mud surface to be planted by sliding on the mud surface with traveling.

Hydraulic cylinder 4 for raising and lowering the seedling planting device
Is a single-acting type, in which a control valve (not shown) is switched to an ascending state in accordance with a descending operation and is supplied with pressurized oil to perform a shortened operation, thereby lowering the weight of the seedling planting apparatus 2. The lowering of the control valve by the lowering operation causes the control valve to switch to the lowering state, thereby draining and extending the oil, thereby lowering the seedling planting apparatus 2 by its own weight, and the neutral state of the control valve by the neutral operation. By switching to, the pressurized oil supply and drainage are stopped, and the expansion and contraction operation is prevented, so that the seedling planting apparatus 2 is stopped and held against the weight.

The wheel mark erasing means is shown in FIG.
(B) As shown in FIG. 4, the soil setting roller 20 as a soil leveling tool for leveling the self-propelled body 1 so as to erase the wheel marks by rolling on the mud surface as the vehicle travels is used as the seedling planting apparatus 2. And a raising / lowering means for raising / lowering a ground leveling operation position below which the ground leveling roller 20 touches the ground and a retreat position where the ground is raised.

The raising and lowering means comprises a pair of left and right support arms 2 which rotatably support the leveling roller 20 at the rear end thereof around a left-right axis P1 in a state of being disposed on the left and right outer sides of the seedling planting apparatus 2.
1 is attached to the planting frame 14 of the seedling planting device 2 so as to be vertically swingable around the left-right axis P2 separately, and a pair of left and right hydraulic cylinders 22 for swinging the support arms 21 separately is provided. The control device 23 is provided. The above-mentioned leveling operation position is a position in which the seedling planting device 2 is raised and the leveling roller 20 is grounded, and the retracted position is a position where the seedling planting device 2 is lowered to the planting operation position. Is higher than the seedling.

The hydraulic cylinder 22 for raising and lowering the leveling roller
Is a single-acting type, and the control valve 24 for this is
The hydraulic oil is supplied to the hydraulic cylinder 22 so that the hydraulic cylinder 22
The lifting state of the support arm 21 against the weight thereof and the weight of the leveling roller 20 so that the leveling roller 20 ascends to the retracted position by shortening the operation, and a state in which the oil is drained from the hydraulic cylinder 22. By allowing the hydraulic cylinder 22 to freely expand and contract, it is possible to freely allow downward swinging of the support arm 21 due to its weight and the weight of the leveling roller 20 and upward swing of the supporting arm 21 due to an increase in the ground reaction force. The state, the supply of hydraulic oil to the hydraulic cylinder 22 and the drainage of oil from the hydraulic
2 can be switched to a neutral state in which vertical movement of the support arm 21 is prevented by preventing expansion and contraction of the support arm 21.
That is, by raising the seedling planting apparatus 2 and switching both control valves 24 to the free state, the leveling roller 20 is lowered by the weight of the support arm 21 and the leveling roller 20, and in this state, both control valves 24 are in the free state. By maintaining
With the weight of the support arm 21 and the leveling roller 20 pressed against the mud surface and grounded, the right and left support arms 21 are swung up and down in response to the ground reaction force acting on the left and right portions of the leveling roller 20 so that the leveling roller 20 is moved. By rolling, on the other hand, switching the control valve 24 to the neutral state in the above state and lowering the seedling planting device 2 by a predetermined amount or maintaining the planting device 2 in the lowered state, a predetermined load or the seedling planting device 2 The grounding roller 20 is grounded while the weight of the grounding roller 20 is applied to the grounding roller 20.

The control device 23 is provided with the lift lever 26
The control valve 24 can be switched between a first control state and a second control state based on the operation of the control switch 27 and the operation of the control switch 27.

The first control is performed when the control switch 27 is operated to the first control position.
When the lowering operation of the control valve 24 is performed, the control valve 24 is switched to a free state so that the leveling roller 20 is allowed to freely contact the ground with the weight of the support arm 21 and the leveling roller 20, and the lifting lever 26 is raised in this state. And the control valve 2 so that the leveling roller 20 is raised to the retracted position.
4 is switched to the ascending state, and when it is detected by the position detection sensor 25 using the potentiometer that the leveling roller 20 has been raised to the retracted position accordingly, the leveling roller 20 is turned on.
Is controlled to switch the control valve 24 to the neutral state so as to maintain the control position at the retracted position.

The second control is performed when the control switch 27 is operated to the second control position.
When the lowering roller 6 is operated, the control valve 24 is switched to the free state so as to lower the leveling roller 20 to the leveling operation position, and the position detection sensor 25 detects that the leveling roller 20 is lowered to the leveling operation position accordingly. When the control valve 24 is switched to the neutral state so that the leveling roller 20 is fixedly maintained at the leveling operation position with respect to the seedling planting device 2 when the raising / lowering lever 26 is operated upward in that state,
The control valve 24 is switched to the raised state so that the leveling roller 20 is raised to the retracted position.
When the position detection sensor 25 using a potentiometer detects that the 0 has risen to the retreat position, the control valve 24 is switched to a neutral state so as to maintain the leveling roller 20 at the retreat position.

According to the above configuration, the wheel marks are erased by grounding the ground leveling roller 20 in a freely rolling manner, and the grounding roller 20 is grounded by pressing the ground leveling roller 20 against the mud surface with a predetermined load and the weight of the seedling planting apparatus 2. All of the wheel traces can be erased, and the points thereof will be described below. The lifting lever 26 is moved to the lowering position simultaneously with, before, or after the raising operation of the seedling planting apparatus 2 prior to turning on the headland with the control switching tool 27 operated to the first control position. Manipulate. As a result, the ground leveling roller 20 descends due to its weight, and the wheels are erased by rolling and freely touching the ground. Simultaneously with or after the lowering operation of the seedling planting device 2 after turning,
Alternatively, the elevating lever 26 is first operated to the ascending position. As a result, the leveling roller 20 is raised and held at the retreat position, and the interference of the leveling roller 20 with the planted seedling can be prevented. The raising / lowering lever 26 is moved to the lowered position at the same time as, after, or after the raising operation of the seedling planting apparatus 2 prior to the turning on the headland with the control switching tool 27 operated to the second control state. I do. Thereby, the leveling roller 2
0 is lowered to the leveling operation position and fixed. Thereafter, the seedling planting device 2 is lowered by a predetermined amount. Accordingly, the wheel marks are erased by touching the ground while the leveling roller 20 is pressed against the mud surface with a load corresponding to the descending amount of the seedling planting device 2. Simultaneously with the lowering operation of the seedling planting device 2 after turning, or
The elevating lever 26 is operated to the ascending position later or earlier. As a result, the leveling roller 20 is raised and held at the retreat position, and it is possible to prevent the leveling roller 20 from interfering with the planted seedling. Of course, instead of lowering the seedling planting device 2 by a predetermined amount, the descending state of the seedling planting device 2 may be maintained. In this case, the weight of the seedling planting device 2 Will work.

[Alternative Embodiment] In the above embodiment, the seedling planting device, that is, the ground working device 2 is equipped with the grounding roller, that is, the grounding device 20, but the grounding device 20 is a self-propelled body, that is, It may be carried out by attaching it to the traveling body 1.

In the above embodiment, the leveling roller is shown as the leveling tool 20, but the leveling tool 20 may be a leveling plate or a rake.

In the above-described embodiment, as the elevating means, the state in which the ground adjuster 20 is brought into contact with the rolling freely and the
In the above-mentioned embodiment, it is possible to switch between a state in which the grounding tool 20 can be switched to a state in which the grounding tool 20 is pressed and grounded without rolling.
Means for pressing and grounding 0 without rolling it may be used.

The raising / lowering means may be means for moving the whole of the leveling tool 20 up and down in accordance with the variation of the ground pressure without rolling the leveling tool 20 in the ground contact state.

In the above-described embodiment, the hydraulic cylinder 22 is actuated by manual operation of the lifting lever 26 to change the leveling roller, that is, the leveling tool 20 between the leveling operation position and the retreat position. 20 may be changed between the leveling operation position and the retreat position by manual operation force.

In the above embodiment, the leveling tool 20 is changed between the leveling operation position and the retreat position by the manual operation of the raising / lowering lever 26.
A wire for linking the hydraulic cylinder 22 with the lifting and lowering of the paddy field working device 2 to automatically change the leveling tool 20 between the leveling operation position and the retreat position, and for changing the leveling tool 20 as the paddy field device 2 moves up and down with respect to the traveling machine 1. A mechanical linking device such as the above may be provided to automatically change the leveling tool 20 between the leveling operation position and the retreat position.

The leveling implement 20 is moved up and down via a winch driven by an actuator such as an electric winch.

In the above embodiment, an example of application to a rice transplanter has been described. However, the present invention can be applied to various paddy field working machines such as a sowing machine in which the ground working device 2 is a sowing device.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a cutaway plan view of a riding type rice transplanter.

FIG. 3 is a side view of a main part in a state in which the grading tool is located at the retreat position and a side view of the main part in a state in which the grading tool is positioned in the terrain action position;

FIG. 4 is a rear view showing a state in which the ground adjuster is rolling.

FIG. 5 is a control block diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling body 2 Ground work apparatus 20 Ground adjuster 21 Support arm

Claims (4)

[Claims] 1. A paddy field working machine having a ground work device connected to a rear portion of a traveling body so as to be able to move up and down movably, and a ground leveling tool for leveling a wheel mark of the traveling body. A paddy field working machine disposed behind the device and provided with elevating means for elevating to a lowering leveling position where the leveling implement is grounded and a retreating position where the ground is raised. 2. The paddy field working machine according to claim 1, wherein said elevating means is means for rollingly supporting the ground preparation. 3. The paddy field working machine according to claim 1, wherein the lifting means includes a pair of left and right support arms for supporting the leveling implement in a state of being disposed on the left and right outer sides of the ground working device. 4. The lifting device according to claim 1, wherein the lifting device is a device for allowing the ground working device to support the lifting device so as to be able to move up and down. The paddy working machine according to any one of claims 1 to 3.