JPH07114611B2 - Rice transplanter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter for rice planting in paddy fields, which can save labor for cultivation management after planting seedlings.

[0002]

2. Description of the Related Art The film-covered cultivation method used in paddy rice cultivation is to put a black colored film (generally called "vinyl mulch") on the paddy field and use both ends of the film with film retaining rings. A method is adopted in which the seedlings are fixed by pushing them into the paddy field, and then a small hole is opened at a predetermined position of the film at the same time as or before the planting, and seedlings are planted in the holes to grow.

According to this film-covered cultivation method, the black coloring of the film makes it possible to sufficiently absorb sunlight and keep the rice field warm, and at the same time prevent evaporation of water in the paddy field and evaporation of fertilizer. There is an advantage that weeds can be surely prevented from growing by cutting off the supply of oxygen and blocking the sun rays except in the vicinity of the holes, and the rice can be efficiently cultivated. Furthermore, the film used in this film cultivation method is relatively lightweight because it is made of a plastic film made of petroleum-based polyethylene, vinyl chloride, etc., and its strength does not change even when it is wet with water. However, for example, even when it is set in the rice planting season, it can be easily attached to the front part of the float of the planting device, which is convenient and easy to handle.

[0004]

[Problems to be Solved by the Invention] Rice grown with organic fertilizer using the film-covered cultivation method as described above has an advantage that pests are less likely to attach to it compared with rice grown with chemical fertilizer, and is a safe food. Has been reviewed as. However, the method of using this film is that both the paddy field paddy and the film that covers the paddy field are soft, so when fixing this film to the paddy field, the film was attached to the soil with a film retaining ring provided on the side of the float. It is necessary to press down considerably deeply into the film, and there is a risk that a gap will be created between the film and the next film that is covered with this pressing operation, and the rice field will be exposed. There is a problem that weeds grow.

Further, when the next film is fixed on the existing film, the edge of the existing film is pulled and the planted seedlings come into contact with the film, and the planted seedlings may be pushed down and become out of stock. There is. Further, there is a problem that the film tends to absorb the sun's rays too much and become too hot, and the heat is transmitted to the seedlings to cause high temperature damage, which adversely affects the survival and growth of the seedlings.

Further, since this film is manufactured from a plastic material, it is not decomposed in the soil due to its characteristics of good water resistance and weather resistance, and remains laid on the rice field until the time of mowing. It is often practiced to dry and crack the rice field by falling water in order to supplement fertilizer according to the growth of rice, manage fertilization such as manure, supply oxygen to rice roots, and eliminate harmful gases generated from coarse organic matter embedded in soil. However, there is a problem that the water management for that purpose cannot be performed, and the growth of rice is suppressed due to lack of oxygen, and the growth is inhibited by gas damage.

As described above, the covering cultivation method using a plastic film has problems, but in order to solve these problems, the applicant of the present invention replaced the plastic film with a non-bleached, additive-free paper sheet having a porous structure. We also tried a covered hydroponic cultivation method of rice by using the method. In this method, a paper sheet is laid on the surface of a paddy field, and a small hole is opened in the paper sheet at a position corresponding to the planting position, and seedlings are planted in this hole. Since the unbleached paper sheet used for this cultivation is yellowish brown, absorbing sunlight, keeping the rice field warm, and suppressing the evaporation of water and fertilizer in the field are the same as the plastic film. is there.

According to the test results of the applicant, this additive-free paper sheet has a characteristic that the plastic film dissolves and disappears in muddy water about 40 days after being laid in a flooded state, which is not in a plastic film.
By the time the paper sheets disappeared, the rice had grown to cover the rice paddy, and the subsequent weeds were hardly seen in the paddy field, which had the advantage of achieving a herbicidal effect close to 100%. In addition, since the paper sheet is hydrophilic, it is easy to fix the paper sheet and the rice pad or the paper sheet and the paper sheet by the water absorbing action of the paper sheet without a special fixing device. It has the feature that it can cover the entire surface of the field, and has the advantage that seedling damage due to weeding and contact between the paper sheet and the seedling does not occur on the entire field. Furthermore, as mentioned above, the paper sheet dissolves and disappears around 40 days after laying, so after that, fertilization management such as additional fertilization according to growth, and water management such as mid-seasoning to maintain the soundness of roots should be performed as in conventional cultivation. It has the advantage that

However, since the additive-free paper sheet is naturally thicker than the plastic film, the outer diameter of the roll is inevitably large and the weight is significantly heavy. Further, since it is a paper sheet, it is weak against water and has a property of being easily broken as compared with a plastic film, so that there is a problem that only a narrow width can be used. For this reason, there are many problems in installing a wide additive-free paper sheet instead of this film on a conventional rice transplanter that uses a plastic film, and deploying this on the rice field to cover it. It was

In the case of an ordinary plastic film roll, one roll having a length of about 200 m has a diameter of 10 c.
The width is about m and the width is about 1.7 m. On the other hand, as described above, this additive-free paper sheet is easy to tear, has a thickness, and has a heavy weight. Therefore, one roll having a length of about 50 m has a diameter of 10 to 12
Only those having a width of about cm and a width of about 1.6 m can be used. Further, the weight of the roll of paper sheet causes a problem in balance of the rice transplanter.

In particular, since the strength of this additive-free paper sheet is extremely reduced when it is wet with water, it is extremely difficult to lay a wide paper sheet randomly on a paddy field in a flooded condition by a machine. During a rounding operation in a headland, etc., the paper sheet is forcibly pulled and ruptures, large wrinkles occur, or problems occur such as creaking on existing parts. A machine that solves the problem is required, but the current situation is that no suitable one has been proposed yet.

The present invention utilizes the advantages of a paper sheet-covered paddy rice cultivation method to automate the work of laying paper sheets and planting seedlings at the same time, and using a plurality of narrow paper sheets to make a rice field with a predetermined width. The present invention provides a device capable of performing planting while covering a plant, especially when the rice transplanter is traveling, holding a plurality of paper sheets immediately before the planting device in a merged state at once. The purpose is to provide a rice transplanter that can be cut.

[0013]

Means for Solving the Problems A rice transplanter according to the present invention for achieving the above-mentioned object is a means for supporting a paper sheet roll on the front center of a running portion of the rice transplanter and on both sides of a rear portion of a driver's seat. Along with the progress of the planting device ,
Means for forming one wide sheet arranged side by side in the width direction and guiding it to the rice field in front of the planting device, and means for holding the merged paper sheet immediately before the planting device and cutting it in the width direction of the machine body And are provided.

Further, it is necessary to fix both ends of the wide spread paper sheet to the rice field or the existing sheet,
As a means for this, a method is employed in which a paper sheet guide roller is provided on the side of the float, paying attention to the water absorption of the paper sheet, so that both edges of the paper sheet are made to adhere to the rice field or an existing sheet by absorbing water. Furthermore, when the central paper sheets are joined and laminated on the paper sheets on both sides, there is a tendency that they will not be attached because there are many parts that do not adhere to the rice field. It is preferably located below the sheet of paper. The width of the paper sheet is 1
The width of covering the rice field in three operations may be divided into three equal parts, or the width of the central paper sheet may be made narrower than the other. Further, when the lateral displacement of the paper sheet is not so large, it is possible to lay the edge portions of the paper sheet on the rice field in an abutting state.

From such a configuration, 3 in front of the planting device.
The sheets of paper are stacked into a single sheet of paper in a wide state, and three floats slide on it, so the sheets of paper are pulled sideways while the float is on the board. It is better to determine the width of the paper sheet and the width to be laminated so that there is no such sheet. As the means for cutting the paper sheets, a means for holding the plurality of paper sheets so as not to move, a means for sequentially cutting the paper sheets in the held state in the width direction, or a means for cutting all at once . The paper sheet cut by the cutting means is held in a state of being developed to have a predetermined width, and is sent out below the planting device with the next planting operation.

[0016]

[Operation] Therefore, three paper sheets consisting of the central paper sheet and the paper sheets on both sides of the paper sheet are spread on the rice field with the edges laminated to the width of the planting device or in an abutting state. The planting work can be performed securely while laying, and the three paper sheets in the expanded state can be cut and fed again when the machine is traveling, so the planting work can be performed efficiently without interruption. it can.

[0017]

[Reference Example] Next, a background of completing the present invention will be described as a reference example with reference to the drawings. FIG. 12 is a side view showing a main part of a rice transplanter in the process of improvement to the present invention, and FIG. 13 is a plan view of the same. A hitch 3 is vertically movable in parallel via a parallel link 2 provided on the rear side of the moving machine main body 1, and the planting device 4 is supported by the hitch 3. Further, a tool bar 5 is fixed to the top link of the parallel link 2, and a roll supporting member 6 is detachably attached to both ends of the tool bar 5, and a single paper sheet roll P is supported at the tip thereof. Further, a rear wheel 7 is provided at a rear portion of the mobile unit main body 1, and a mudguard 8 is provided so as to cover the rear of the rear wheel 7 to prevent the muddy water from being scattered by the rear wheel 7 and the paper sheet roll. Prevents P from getting wet. The lower end of the mudguard 8 is curved rearward and is provided with a supporting portion 8a for temporarily supporting the paper sheet roll P when it is mounted on the roll supporting member 6. Furthermore, the driver's seat 9 of the mobile device body 1
A spare storage unit 10 is provided at the rear of the storage unit, and a spare paper sheet roll P is stored therein.

The paper sheet roll P which can be mounted on the rice transplanter in the middle of this improvement has a width corresponding to the total number of rows (for example, in the case of 5-row planting, the spacing between shoots is 300 mm is 1.7 m) and has a predetermined length. And the diameter is limited to the space below the parallel link 2 which is limited by the position where the input shaft 11 passes and the distance d between the mudguard 8 and the rice field M. In addition, the diameter of the paper sheet roll P is restricted to 11.5 cm or less.

However, the maximum length of the paper sheet roll P having such a diameter is limited to about 45 m. On the other hand, the standard area of the paddy field is 30a, with the long side of 100m and the short side of 30m. Therefore, when transplanting rice seedlings with this rice transplanter, one assistant for installing a paper sheet roll is required near the center of the field, and one assistant at each end of the field for a total of three assistants. A large number of workers are required for the sheet-covered paddy rice transplanting work.

Further, as described above, the length of the paper sheet roll P is large and the weight thereof is heavy, and it is difficult to move the paper sheet roll P in the field with the roll, and the mudguard 8 is used temporarily. Even if such a support portion 8aa is attached, the work of replenishing and loading the long paper sheet roll P onto the support shaft at the lower end portion of the roll support member 6 is difficult. As described above, since the rice transplanter before reaching the rice transplanter of the present invention forms the paper sheet roll P in the entire width of the planting device 4, the paper sheet roll P has a large weight and a long sheet roll P. There is a problem that they must be handled, and it is difficult to work with the same number of people as the rice transplanters currently used.

By the way, there are many cases in which the rice transplanter transplanting work by the rice transplanter currently in use is carried out by a total of two people, one assistant for transferring seedlings and one operator of the rice transplanter.
Then, the present inventor paid attention to this and further improved the rice transplanter, and developed the rice transplanter of the present invention which enables transplantation of paper sheet-covered paddy rice by two operators.

[0022]

EXAMPLES Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a main part of a rice transplanter according to the present invention, and FIG. 2 is a side view. In the present invention, in particular, a paper sheet used during development has a width of three divisions. Among the three divided paper sheet rolls P ₁ , P ₂ , P ₃ , the central paper sheet roll P ₁ is used in front of the moving machine main body 1 and the other two. The paper sheet rolls P ₂ and P ₃ are arranged on both sides behind the driver's seat 9.

Roll supporting members 12 are erected on both sides of the rear portion of the driver's seat 9 of the main body 1 of the moving machine, and the paper sheet rolls P ₂ and P ₃ are supported via a shaft supported at the tip of the roll supporting members 12. .
These two paper sheet rolls P ₂ and P ₃ are fixed to a seedling table support member 15 of the planting device 4 via a free roller 14 supported by a stay 13 extended to the rear of the moving machine body 1. It is guided to the paper aligning roller device 17 supported by the supported support member 16. A mudguard 8 is arranged behind the rear wheel 7, and two paper sheets p ₂ and p drawn from the paper sheet rolls P ₂ and P ₃ are placed at positions where the muddy water is prevented from scattering by the rear wheel 7. ₃
Form the path of.

Further, a paper sheet roll P laid in the center of a roll supporting member 18 projecting in the center of the front part of the main body 1 of the moving machine.
₁ is supported. The paper sheet paper sheet p ₁ drawn from the roll P ₁ is guided to the mobile station a pair of upper and lower free rollers 20 supported by the stay 19 which is extended to the front lower side of the main body 1, further the mobile body It is supported by a support member 22 provided at the lower part of the sheet 1 and passes through the inside of a paper feed case 23 extended along the machine body to be guided to the paper aligning roller device 17.

On this paper aligning roller device 17,
Three paper sheets p ₁ , p ₂ , p ₃ drawn from the _three paper sheet rolls P ₁ , P ₂ , P ₃ are supported with their edges overlapped. These three paper sheets p ₁ ,
It is preferable that p ₂ and p ₃ be supported with their edges overlapped as shown in FIG. 1, but in some cases, they can be supported with their edges abutted. Then, the plurality of paper sheets expanded in a wide width are guided to the rice field M via the paper aligning roller device 17, and then the float 24 of the planting device 4 moves on the paper sheet M so that the planting claws are moved. Will be planted at the same time as drilling.

FIGS. 3 and 4 show this paper aligning roller device 17
The details of the above are shown, and the paper alignment drive roller 17a is driven via a motor 25 and a belt 26 fixed to one of the support members 16. As shown in FIG. 4-a, a paper support plate 17b is mounted on a rotary shaft 17c which is manually or automatically rotated by a predetermined angle so as to face the paper alignment driving roller 17a and to have a predetermined distance h. There is.

In the state shown in FIG. 4-a, the paper support plate 17b is lowered to the lowered position, and the paper alignment drive roller 17a and the paper support plate 17b are moved downward.
17b and gap g is formed between the guide the center of the paper sheet p ₁ on the lower side, the paper sheet p ₂ lateral on its upper side,
p ₃ and is combined with guides, seedlings drawn out to the paddy M of three lower paper sheet p _1, p _2, p ₃ the single planting unit are arranged side by side in the 4 in the merged state The state of work during planting is shown. In addition, FIG. 4-b shows that the paper support plate 17b is raised to a raised position so that the three paper sheets p ₁ , p ₂ and p ₃ are sandwiched between the paper support plate 17b and the paper alignment drive roller 17a. The state in which the paper sheet is held is shown in FIG. 6B, and this state is when the paper sheet is being fed to the lower position of the float or when the paper sheet is cut as in the case of traveling.

FIG. 4-c shows an arm 17 provided on the rotating shaft 17c.
A free roller 17e is provided at the tip of d. This figure corresponds to the state of FIG. 4-a, and FIG. 4-d corresponds to the state of FIG. 4-b. In this embodiment, the endless belt around which the belt 26 is wound is used as the interlocking mechanism of the paper alignment driving roller 17a, but it is also possible to interlock with other shafts such as screw gears or gear transmission mechanisms. .

As shown in FIG. 2, the paper feed case 23 supported below the machine body of the mobile machine body 1 has a tunnel shape.
Through this is passed through the paper sheet p ₁ Paper Alignment roller device
This paper sheet p ₁ is for guiding to the 17th position.
The upper surface of the case is made of transparent plastic so that it can be monitored, so that it can prevent the rear wheel 7 from getting wet with muddy water, and it can prevent engine oil from getting dirty. To prevent.

As shown in FIG. 2, a hitch 3 is supported by a parallel link 2 provided at the rear of the mobile body 1 so as to be vertically movable in parallel, and the hitch 3 supports the planting device 4. . The planting device 4 has a plurality of drive cases 4b supported by a connecting pin 4a provided at the center of the hitch 3 so as to be swingable right and left. A float 24 composed of a center float and a side float is supported below the drive case 4b via a link, and planting arms 4c are rotatably provided on both sides behind the float 24. Further, in front of the drive case 4b, a seedling mounting table 15a is supported via a seedling mounting table supporting member 15 so as to be continuously movable left and right in a state in which the seedling mounting table 15a is inclined in a front high and a low state.

An input shaft 12 driven by the moving machine body 1 is provided in front of the drive case 4b, and the power of the input shaft 12 gives a planting motion to the planting arm 4c.
Drive the napier shaft 15b to move the seedling stand 10 to the planting arm 4c.
It is configured to continuously move to the left and right in conjunction with the planting movement of. Further, a paper sheet cutting device 29 is supported by a supporting member 28 fixed to the seedling table supporting member 15. As shown in FIG. 5, the paper sheet cutting device 29 is configured such that a lever 32 extending from a support member 31 having a long cutting blade 30 facing downwards pushes down a bar 15 in a direction of an arrow a by pressing the paper. It is configured to cut the three paper sheets supported by the matching roller device 17 at once. 31a
Is a return spring.

The paper sheet cutting device 29 of FIG. 5 is shown as a shearing machine type using a cutting blade 30 in a linear field, but other types can be adopted as described above. 6 and 7 show the track shaft above the frame 33.
34, the moving body 35 is supported on the track shaft 34, the moving body 35 is moved left and right by a drive belt 36 driven by a motor 37, and a cutting blade provided at the lower end of the moving body 35. The paper sheet on the cutter receiving shaft 38 supported by the lower end of the frame 33 is cut across by a cutting means such as the above. The cutter shaft 38 has two round pipes or square pipes in parallel, two L-shaped members facing each other, or a slit for admitting a cutting blade on the upper surface of the pipe. The thing etc. can be used.

FIG. 8 shows an example of a disc type cutter.
A disk-shaped cutting blade is attached to the tip of an arm 39 supported by the moving body 35.
It is configured such that it supports 40 and presses the paper sheet onto the cutter receiving shaft 38 by the paper pressing rolls 41 provided on both sides of the cutting blade 40 while cutting the paper sheet. Paper press roll
If the blade 41 can be moved along the cutter receiving shaft 38 so that it can be driven, a good sharpness can be obtained.

FIG. 9 shows a modification of the cutter shown in FIG. 8, in which the lateral arm 42 is supported at the tip of the arm 39, and the paper pressing roll 41 is supported at both ends of the lateral arm 42.
In the case of this cutter, the cutting blade 40 is passed through the slit of the cutter receiving shaft 38 to cut the paper sheet on the cutter receiving shaft 38. FIG. 10 shows another type of blade support plate, in which two disc-shaped paper pressing rolls 41 are supported by the moving body 35, and a blade support plate 44 having a stopper 43 is provided between the paper pressing rolls 41. A plate-shaped cutting blade 45 is supported on the side surface of the blade support plate 44. This cutting blade 45
With a double-edged blade, the paper sheet can be cut by the reciprocating movement of the moving body 35. It should be noted that the cutting blade may be of various types such as a disk-shaped blade, a saw-toothed blade, or a blade that is generally used as a sheet cutter.

FIG. 11 shows the relationship between the paper sheet and the planting device 4 during the rice planting work. In the case of the rice transplanter for 5-row planting, the supporting member fixed to the side drive case 4b.
4e and the guide roller 4g are connected by a pin 4f, and the play of this pin 4f is utilized to make a rotational movement only about 15 ° to the rear side and escape. That is, FIG. 11 and FIG.
It can be rotated counterclockwise by 15 ° from the state shown in (4), and normally this guide roller 4g follows the field M while pressing the paper sheet by its own weight. Also,
The planting claw 4d provided at the tip of the planting arm 4c has a paper sheet p ₁ , unwound from _three paper sheet rolls P ₁ , P ₂ , P ₃ .
It has a function of forming a small-diameter hole in p ₂ and p ₃ and a function of supporting one seedling. Guide roller 4g
Is located above the lower surface of the float 24 by a distance H and suppresses the upward warping of the paper sheet sides p ₂ , p ₃ so that the lower surfaces of the paper sheets p ₂ , p _{3 and} the bottom surface M are always in close contact with each other.
It is adjusted using the play of.

As the paper sheet to be supplied to the rice transplanter according to the present invention, one generally sold as "corrugated cardboard core material" can be used, and 100% of yellow-brown waste paper is used for no bleaching. The recycled paper is a hard paper-like elastic paper, for example, in the case of 5-row planting, the paper sheet p ₁ at the center is set to the lower side with the inter-row spacing of 300 mm, and the side paper rolls are set to the upper sides of both sides. Paper sheets p ₂ and p ₃ are drawn out from P ₂ and P ₃ , and these three paper sheets are partially overlapped (about 10 per side).
It is advisable to use a sheet with a width of 1.6 m after confluent forming on one wide sheet while maintaining the overlap margin of mm).

Next, the operation of the rice transplanter according to the present invention will be described.
Explain. Paddy fields to be planted are scratched in the usual way.
It is in a leveled condition, and the flooding on the rice field at the time of planting is
It is adjusted to a low level. As the mobile unit body 1 moves forward
It is supported on the front of the mobile unit 1 and on both sides behind the driver's seat 9.
Paper sheet roll P₁, P ₂, P₃More paper
P₁, P₂, P₃Is released and the paper alignment roller
It joins at the part of the table 17 and is developed into a single sheet in the width direction. So
Then, as shown in FIGS. 3 and 4, the paper support plate is provided only at the start of planting.
Rotate 17b upward until it contacts the paper alignment drive roller 17a.
Let Then, the motor 25 is controlled to drive the drive roller 17a.
Then, the paper sheet was not bent and
To the floats 24 and guide rods of the planting device 4
Guided below 4 g Under the float 24
3 paper sheets p₁, P₂, P₃Is that
After that, the paper support plate 17b and the paper alignment drive roller 17a are shown in FIG.
-If the guide roller 4g and float 24
Therefore, while being pressed by the rice field M, it absorbs the water of the rice field and becomes wet.
Moves the main unit 1 of the mobile unit because it is in close contact and fixed.
Is automatically paid out by.

The guide roller 4g and the float 24 moving on the paper sheet flatten the rice field M while automatically adjusting the planting part up and down and smoothing the trailing wheels 7a and 7b.
Then, the lower end portion of the mat seedling placed on the seedling placing table 15a is scraped off by the planting claws 4d, and the paper sheets p ₁ and p laid evenly
At the same time as opening holes of a predetermined size in ₂ and p ₃ , seedlings are planted.

Further, the supporting member 16 for supporting the paper aligning roller device 17 is provided in the planting device 4 and rolls together with the planting device 4, so that the three paper sheets are always parallel to the rice field M. As a result, the paper sheet can be smoothly fed out along the field M while keeping the developed state without fear of wrinkling of the paper sheet. Further, when the paper sheet is cut while traveling on the headland, the traveling of the moving machine body 1 is stopped while the planting device is being lowered and grounded, and then the paper support plate 17b is moved to the paper alignment drive roller 17a. Rotate until they come into contact and sandwich the paper sheets p ₁ , p ₂ , p ₃ between them,
The paper sheet is cut by the cutting blade of the cutter 30 being lowered to a position where the front and rear ends of the paper sheet cutting device 29 are held and fixed by the paper aligning roller device 17 and the float 24.

Therefore, the paper sheet is held at the front and rear of the cutting portion and is subjected to the cutting action in a tensioned state, so that the paper sheet is surely cut as desired. After cutting the paper sheet in this way, the planting device 4 is raised with the paper sheet unrolled from the paper sheet roll being held by the paper aligning roller device 17, and then the headland is turned. . Then, after turning, the paper sheet is fed out and the planting is restarted in the next step by the same operation as described above.

[0041]

The rice transplanter according to the present invention achieves the above-mentioned object. The rice transplanter according to the present invention supports paper sheet rolls at the center of the front part of the running part of the rice transplanter and on both sides of the rear part of the driver's seat. And a plurality of the above-mentioned paper sheets as the planting device progresses.
Means for forming one wide sheet aligned in the width direction of the machine and guiding it to the rice field in front of the planting device, and holding the merged paper sheet immediately before the planting device and cutting in the width direction of the machine And a means for doing so are provided, and the following effects can be obtained.

(1) The work of spreading and laying a paper sheet on the rice field and the seedling planting work can be performed at the same time while reliably preventing the paper sheet from getting wet with water, etc. until the previous step of laying it on the rice field. Therefore, it is possible to perform planting work for cultivating paddy rice covered with a paper sheet with high efficiency and accuracy. In this paper sheet-covered paddy rice cultivation, the paper sheet can keep the field scene warm by absorbing the sun rays, and can suppress the evaporation of water and fertilizer in the field, so that the seedlings can be well-grown and the initial growth can be improved. In addition, by covering it with a paper sheet, weeds are prevented from growing in the field, and due to the nature of the paper sheet, it can be used after laying in flooded conditions.
Since it dissolves in muddy water in about 40 days, after dissolving the paper sheet, it is possible to manage the fertilization according to the growth of paddy rice and the water to keep the roots healthy, as in the conventional farming method. It can be performed.

(2) Since the float slides on the surface of the paper sheet laid on the rice field, planting can be carried out while the planting section is automatically moved up and down and the wheels are leveled. In addition, since a paper sheet is laid on the rice field in a field with a lot of moisture, the paper sheet starts to absorb water immediately after this laying, and the paper sheet starts to absorb water, becoming a wet state, and sticking to the field surface. The effect can be enhanced. Therefore, the paper sheet does not peel off from the paddy field even under strong wind, and the covering action during the laying period is reliably maintained.

(3) At the time of headland traveling, a means for holding and cutting the paper sheet in a confluent state is provided immediately before the planting device, so that the heading operation in the headland can be carried out smoothly and efficiently. I can carry it out. (4) Since the paper sheet roll is divided into three parts in the machine width direction, one paper sheet roll is provided at the center of the front part of the machine body, and the other two are provided on the rear left and right sides of the machine body, respectively. The weight of the paper sheet roll hanging on the machine is distributed before and after the machine, the paper sheet roll support member is lightened, the machine balance can be maintained well, and the individual paper sheet rolls are inevitably lightweight. Therefore, the loading operation of this becomes extremely easy.

[Brief description of drawings]

FIG. 1 is a plan view of a rice transplanter according to an embodiment of the present invention.

FIG. 2 is a side view of the rice transplanter of FIG.

FIG. 3 is a perspective view showing a main part of a paper matching roller device.

4A is a side view of the paper aligning roller device in a state where a paper sheet is passing, FIG. 4B is a side view showing a state of sandwiching a paper sheet, and FIG. 4C is a side view of a paper supporting plate in FIG. FIG. 3 is a side view of the paper-matching roller device in the state where the paper sheet of the above-mentioned device is passing, and FIG.

FIG. 5 is a perspective view showing a main part of a paper sheet cutting device.

FIG. 6 is a plan view showing a main part of another type of paper sheet cutting device.

FIG. 7 is a front view showing a main part of the paper sheet cutting device.

FIG. 8 is a side view of a paper sheet cutting device of still another type, and FIG. 8 is a front view thereof.

FIG. 9 is a side view of a paper sheet cutting device of still another type, and FIG. 9 is a front view thereof.

FIG. 10 is a side view of a paper sheet cutting device of another type, and FIG.

FIG. 11 is a cross-sectional view showing a state in which an end portion of a paper sheet is moved while being pressed by a guide roller.

FIG. 12 is a front view showing a main part of the rice transplanter under development of the present invention.

FIG. 13 is a plan view of a rice transplanter under development of the present invention.

[Explanation of symbols]

1 Mobile unit body 4 Planting device 4e Support member 4g Guide roller 4f Pin 10 Preliminary storage part for paper sheet roll 12 Roll support member 14 Free roller 16 Support member 17 Paper alignment roller device 17a Paper alignment drive roller 17b Paper support plate 17c Arm 17e Free roller 18 Roll support member 23 Paper feed case 29 Paper sheet cutting device 30 Cutting blade 32 Lever 34 Tracking shaft 35 Moving body 36 Drive belt 38 Cutter receiving shaft 40 Disc type cutting blade 41 Paper pressing roll 42 Side arm 43 Stopper 44 blade support plate. P ₁ , P ₂ , P ₃ paper sheet roll p ₁ , p ₂ , p
₃ paper sheets.

Claims (1)

[Claims] 1. A unit for supporting a paper sheet roll on the front center of a running part of a rice transplanter and on both sides of a rear part of a driver's seat, and a plurality of the paper sheets are arranged in the width direction of the machine body as the planting device progresses.
Means for forming a single wide sheet and guiding it to the rice field in front of the planting device, and means for holding the joined sheet of paper immediately before the planting device and cutting it in the width direction of the machine. Rice transplanter provided.