JP4907149B2 - Paddy weeder - Google Patents

Description

  The present invention relates to a weeding machine for weeding a weed generated in a paddy field, and more particularly to an arrangement structure of a weeding device with respect to a wheel in a paddy field weeding machine that is self-propelled by one wheel.

  Recently, paddy rice cultivation has been implemented with reduced pesticides, no pesticides, or organic cultivation, and as a result, weeding machines for paddy fields that weed mechanically without using herbicides even after weeding are drawing attention. Has been.

  Conventionally, a paddy field provided with a wheel that self-propels by an engine and a weeding device having a rotor that rotates by grounding resistance with the paddy surface, while the rotor rotates and scrapes weeds between stocks and stock lines while traveling by wheels. A weeding machine has been devised (see Patent Document 1).

  There has also been proposed a paddy weeder that uses the wheel as one wheel and can turn the planted seedling without damaging the planted seedling. It is arranged side by side in a substantially horizontal line, or in a number of planting rows with a predetermined interval in the front-rear direction so as to sandwich the left and right sides of one planting seedling row (inclination) (Direction) (for example, Japanese Patent Application No. 2004-302456; unpublished at the time of filing this application).

JP 2002-204603 A

  The one-wheel type paddy field weeder needs to lift the handle at the end of the field and turn it in a state where the weeding device is raised so as not to defeat the planted seedling. In the case where the rotor is arranged or is inclined in the front-rear direction in the same direction, all the rotors are located behind the wheels, and the inter-row weeding rotor or float is located behind the inter-stock rotor. Combined with the arrangement, the distance from the wheel to the weeding device becomes long, and the operator needs to lift the handle with a large force.

  Therefore, the present invention provides a weeding machine for paddy fields that makes it possible to dispose the weeding device close to the wheel (axle), and thus lightens the lifting work of the weeding device by the handle when turning at the end of the field. It is for the purpose.

The present invention according to claim 1 has a rotor (40) for weeding between stocks and stock wrinkles by rotating by contact with a wheel (2) for traveling driven by an engine (4) and a rice field (D). In a paddy weeder (1) comprising a weeding device (5) and a handle (13) extending rearward of the machine body (3),
The wheel (2) consists of one wheel,
Two pairs of rotors (40 ₁ f) that weed out the inter-strains between the left and right planting strips (U ₁ , U ₂ ) of the strip (B ₁ ) where at least the wheel (2) of the rotor (40) travels. , 40 ₁ r) (40 ₂ f, 40 ₂ r) are arranged at predetermined intervals in the front-rear direction across the planting strips (U ₁ , U ₂ ), respectively.
The rear rotors (40 ₁ r, 40 ₂ r) of the two pairs of rotors arranged in the front-rear direction are arranged so as to be located behind the wheels (2).
It is in the weeding machine for paddy fields.
Specifically, the airframe (3) has a support rod (23) extending in the left-right direction with respect to the traveling direction, and the support rod includes a plurality of attachment arms extending obliquely in the front-rear direction of the support rod ( 36 ...), and the rotor shaft (40a) of the rotor (40) is rotatably supported via brackets (37) at both front and rear ends of these mounting arms,
Each of the mounting arms (36) is arranged so as to cross the planting line (U) in a plan view, and a pair of rotors (40f) (40r) arranged at both front and rear ends of one mounting arm are Weeding between the stocks of the planting strips and the stock lines from the left and right of the planting strips traversed by the mounting arm,
The two pairs of rotors (40 ₁ ) (40 ₂ ) for weeding the left and right planting strips between the strips on which the wheels (2) travel are respectively rear rotors (40 ₁ r) (40 ₂ r) is arranged to be located behind the wheel.

According to the second aspect of the present invention, the front rotor (40f) of the pair of rotors (40f) (40r) disposed at the front and rear end portions of each mounting arm (36 ...) is configured so that the wheel ( 2) and arranged so that at least a part of it overlaps,
It exists in the weeding machine for paddy fields of Claim 1.

The present invention according to claim 3 is characterized in that the rotor (40) has four pairs of rotors for weeding at least four planting strips and stock lines.
Each of the rotors is arranged to be mirror-symmetric with respect to a plane (V-V) on which the wheel (2) is located.
It exists in the weeding machine for paddy fields of Claim 1 or 2.

According to a fourth aspect of the present invention, the weeding device (5) is arranged between the weeding part (20) between the strains having the rotor (40) and the rear of the rotor, and weeds between the planting strips (B). Having a weeding section (21) between the strips,
It exists in the weeding machine for paddy fields in any one of Claims 1 thru | or 3.

  In addition, although the code | symbol in the said parenthesis is for contrast with drawing, it does not have any influence on description of a claim by this.

  According to the present invention according to claim 1, a rotor (rotor for inter-strain) that weeds between stocks and stock lines is placed at a predetermined interval in the front-rear direction across the planting strip, and the planted seedling (strain) Both the left and right rotors do not act at the same time, and the two rotors on the left and right between the lines on which the wheels run can be weeded without damaging the seedlings. Since it is arranged so as to be located between the streaks, it becomes possible to arrange the rotor between stocks and stock wrinkles (rotor for stocks) close to the wheel (axle), lift the weeding device with the handle and rotate the weeder The operation at the time of turning can be lightened.

According to the second aspect of the present invention, since the front rotors arranged at the front and rear ends of each mounting arm are arranged so as to overlap the wheels in a side view, the weeding device is arranged at a position close to the wheels. The turning work can be easily and reliably performed.

  According to the third aspect of the present invention, the rotor for weeding the multiple strips is arranged so as to be mirror-symmetric with respect to the plane on which the wheels are located, so that the right and left balance of the paddy field weeder is well maintained, Weeding work and turning work can be performed stably.

  According to the fourth aspect of the present invention, since the inter-strain weeding portion having the rotor is disposed close to the wheel, the inter-row weeding portion can also be disposed relatively forward, and the weeding device However, even if it has an inter-strain weeding part and a streak weeding part, the turning operation of the weeder can be performed lightly and easily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, 1 is a one-wheel self-propelled paddy field weeding machine according to the present invention. The weeding machine 1 has one traveling paddy wheel 2 and an airframe supported by the wheel. 3, an engine 4 serving as a drive source for the wheels, and a weeding device 5.

  The airframe 3 has two frames 9 and 9 extending in parallel in a plan view in the front-rear direction, and two connecting plates 12 extending downwardly so as to sandwich the wheel 2 from these frames. Further, a handle 13 fixed to the rear end of each frame and extending rearward and formed in a loop shape is integrally provided. The left and right frames and the handle are connected to each other by a pipe 10 and a plate 11. And is configured integrally. An axle 2a of the wheel 2 is rotatably supported at the lower part of the two coupling plates 12, 12, and one coupling frame 12 is provided with a gear box 15 interlocking with the axle 2a.

  A shaft case 16 is fixed across the one frame 9 and the gear box 15, and the shaft case 16 extends obliquely toward the front / upper side of the machine body 3, and the engine 4 is disposed at the tip thereof. Has been. The power from the engine 4 is transmitted to the gear box 15 via the shaft in the shaft case 16 and further to the wheels 2. Further, a mounting bracket 17 is integrally fixed to the front ends of the frames 9 and 9 and is fixed to the bracket 17, and a balance weight 19 is fixed to the bracket 17 so that the position can be adjusted in the left-right direction.

  The weeding device 5 is composed of an inter-strain weeding unit 20 for weeding between strains and strain lines, and an interstitial weeding unit 21 for weeding the strips, and is located above and below the body 3 behind the wheel 2 and below the handle 13. The direction position and the front and rear rotational direction positions are arranged so as to be adjustable. That is, the weeding device 5 includes a support rod (square pipe) 23 that extends in the lateral (left and right) direction and a connecting rod 25 that is fixed to a predetermined portion of the support rod and extends upward. Connecting rods 26 and 26 are connected to the left and right connecting plates 12 by pin connection, and an extension rod 27 is connected to the upper side of the connecting rod 25 and one of the connection plates 12 by pin connection. Thus, a parallel link that supports the support rod 23 movably in the vertical direction is configured. Further, the telescopic rod 27 is provided with a handle 29, and by rotating the handle, the telescopic rod 27 can be expanded and contracted to adjust the rotation position of the support rod 23.

  A notch plate 31 is connected to a central portion of the support rod 23 by a pin 30 so as to freely rotate and extend upward. The notch plate 31 is urged counterclockwise in FIG. 1 by a torsion spring 34. Yes. A groove 31a having a plurality of positioning notches is formed in the notch plate 31, and an operation lever 32 extending rearward is integrally fixed to the upper end. The pipe 10 fixed to the handle 13 is provided with a notch pin 33. The notch pin 33 is inserted into the groove 31a and engaged with a predetermined notch, so that the vertical position of the weeding device 5 is adjusted and fixed. Is done.

  Four supporting arms 36 (corresponding to four strips) are fixed to the support rod 23 by bolts 35 at intervals corresponding to the planting strip row U, and brackets are respectively attached to both ends of the mounting arms. An inter- stock weeding rotor 40 is supported through 37. The rotor 40 includes a rotor shaft 40a that is rotatably supported at a lower end of the bracket 37 at a predetermined angle, and a rotor blade 40b that is radially attached to the rotor shaft. When the weeder 1 is in contact with the surface D, it rotates along with the self-running of the weeder 1. Moreover, the attachment arm 36 can adjust an attachment angle with the volt | bolt 35 with respect to the support rod 23, and can adjust the position with respect to the planting row U of the rotor 40 by this.

A bracket 41 is fixed to the support rod 23 so as to correspond to the center three spaces B, B ₁ , B. The bracket extends rearward, and the interstitial weeding rotor 42 rotates at the rear end. It is supported freely. The rotor includes a rotor shaft 42a extending in a lateral (horizontal) direction, and a cage-shaped rotor rod 42b that is radially attached to the rotor shaft and has a portion parallel to the rotor shaft. It rotates with the self-propelling of the weeder 1 by contacting the rice field. Brackets 43 are fixed to the left and right ends of the support rod 23 corresponding to the gaps B and B, these brackets extend rearward, and a float 45 is fixed to the rear end. These floats 45 are partially cut away at the rear portion, and a stand bar 46 fixed to the bracket 43 extends rearward and downward through the cutout 45a.

  The inter-plant weeding rotor 40 constitutes the inter-plant weeding portion 20, and the inter-row weeding rotor 42 and the float 45 constitute the inter-row weeding portion 21. The interstitial weeding part 21 is disposed behind the inter-strain weeding part 20 in the traveling direction, and the float 45 is located behind the interstitial weeding rotor 42 and its front end side is partially interstriped in a side view. It arrange | positions so that it may overlap with the rotor 42 for weeding.

In the inter-plant weeding portion 20, in the plan view (see FIG. 2), the mounting arm 36 on the right side with respect to the traveling plane VV of the traveling wheel 2 consisting of one wheel is inclined at a predetermined angle in the clockwise direction. The mounting arm is disposed at a predetermined angle in the counterclockwise direction. Therefore, the pair of rotors 40 attached to the respective mounting arms 36 is such that the front rotor is on the right side of the row U and the rear rotor is on the left side of the row U on the right side of the wheel. In the left side of the wheel, the rotor on the front side is located on the left side with respect to the row U and the rotor on the rear side is located on the right side with respect to the row U. That is, with respect to the plane VV on which the wheel 2 is located, the left and right rotors 40 are arranged so that the front-rear relationship of the pair of rotors attached to the attachment arms 36 is mirror-symmetric. In particular, the rotor ₄₀ 1 f, 40 ₁ r a pair of herbicidal the planting condition _{U 1} in the right condition between _{B 1} the wheel is traveling, and the front side of the rotor 40 ₁ f on the right side of Uezukejo _{U 1} rotor 40 ₁ r of the rear side located on the left side of Uezukejo _{U 2,} the rotor _{40 2} f, ₄₀ 2 r a pair of herbicidal the planting condition _{U 2} the left of the strip between _{B 1} represents the front of The rotor 40 ₂ f is positioned on the left side of the planting strip U ₂ and the rear rotor 40 ₂ r is positioned on the right side of the planting strip U ₂ (the above two pairs of rotors are referred to as 40 ₁ and 40 ₂ below). Write down).

That is, the two pairs of rotors 40 ₁ , 40 ₁ and 40 ₂ , 40 ₂ are both rear rotors 40 ₁ r, 40 ₂ behind the wheels 2 in the space B ₁ where the wheels 2 are located. r is located, and the front rotors 40 ₁ f and 40 ₂ f are located in the strips B and B adjacent to the strip B ₁ and do not interfere with the wheel 2. As a result, the inter-strain weeding portion 20 can be disposed so as to approach the wheel 2 (axle 2a). Specifically, the front rotors 40 ₁ f and 40 ₂ f of the two pairs of rotors are viewed from the side ( 1), the wheel 1 is arranged so as to overlap at least partly. Further, the entire weeding device 5 including the interstitial weeding unit 21 (the interstitial weeding members 42 and 45) located behind the inter-strain weeding unit 20 is disposed so as to approach the wheel 2.

  Next, the operation of the paddy weeder 1 having the above structure will be described.

  When the paddy weeder 1 is placed in the field, first, the angle of the weeding device 5 is adjusted by rotating the handle 29 according to the depth H of the paddy field. Thereby, the front and rear inter-row weeding rotors 40 and 40 and the streak weeding rotor 42 are in contact with the paddy surface at substantially the same level corresponding to the depth H of the working paddy field. Further, the operation lever 32 rotates the notch plate 31 against the torsion spring 34, adjusts the height of the handle 13 according to the operator, and engages the notch pin 33 with an appropriate notch. Fix it.

  In this state, the rotation of the engine 4 is transmitted to the wheels 2 and the weeder 1 travels along the planting row U. The interweed weeding section 20 is rotated so that the pair of rotors 40, 40 attached to the attachment arm 36 sandwich the respective planting rows U, respectively, in contact with the inter-stock and the stock surface of the stock line, and scrape the weeds. Weeding. At this time, the planted seedling P has a thick stem, is not scratched by the rotor 40, and the pair of rotors 40, 40 are arranged at a predetermined interval in the front-rear direction. The rotor does not act on the planted seedling P from the left and right at the same time, and the planted seedling can escape in the opposite direction with respect to the direction of action of one rotor, preventing the planted seedling from being damaged by the rotor. it can.

  Further, the inter-row weeding portion 21 rotates around the inter-strand B with a predetermined width around the rotor shaft 42a, which is the horizontal axis of the rotor 42, and scrapes the weed of each inter-strand B. Then, it is embedded in the rice field together with the weeds that have been scratched by the inter- stock weed rotor 40. At the same time, the left and right floats 45, 45 bury the weeds of each streak B in the rice field together with the weeds that have been scratched by the inter-weed rotor 40. At this time, the left and right floats 45 slide on the surface of the paddy field to prevent the left and right inclination of the paddy field weeder 1 and stabilize the traveling of the weeder 1. As a result, the weeds in the four rows of planting lines U and the weeds of the row B between each planting line and the line B adjacent to the planting line are weeded.

  When the paddy weeder 1 travels while weeding the weeds between the lines and the streaks as described above and reaches the field end, the operator operates the operation lever 32 to indicate the two-dot chain line in FIG. Thus, the handle 13 is fixed in the lowered position. In this state, the operator lifts the handle, lifts the weeding device 5 away from the paddy surface to a predetermined height, turns the vehicle body through the single wheel 2 between the stocks, and forms the following four planting strips. Match. At this time, due to the above-described arrangement of the inter- stock weeding rotor 40, the weeding device 5 is disposed so as to approach the wheel 2 (axle 2a). As a result, the vehicle body 3 is placed in the forward-downward state around the axle 2a. The rotational moment when tilting and lifting the weeding device 5 is reduced, and the force for lifting the handle 13 is reduced. On the other hand, the raising amount of the weeding device 5 with respect to the lifting stroke of the handle 13 is small, but as described above, the raising amount of the weeding device can be secured by lifting the handle 13 once and then lifting it.

  Next, similarly, the wheel 2 is rotated and the weeder 1 is run from the opposite direction to weed the weeds between the adjacent four lines of stock and between the lines. At this time, the float 45 slides back and forth between the adjacent strips of work, and the work is performed twice. By repeating this, weeding between the plants of all planting strips and between the strips is performed.

In addition, although the weeding machine for paddy fields described above is a four-row type, it may be a multi-row type such as six or the like, and in this case, the weeding device becomes heavy, so the arrangement of the inter- stock weeding rotor 40 according to the present invention is as follows. It works more effectively. The arrangement of the strains herbicidal rotor, sufficient if the rotor 40 _1, 40 ₂ of the two pairs of wheels 2 corresponding to the planting ridges of the right and left sides of the strip between B ₁ U _1, U ₂ which is located, The other rotors do not necessarily have to be mirror-symmetrical as shown in FIG. 2, and may have other arrangements such as arrangement in a row in the lateral direction.

The side view which shows the weeding machine for paddy fields applied to this invention. The plan view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Weeding machine for paddy fields 2 Wheel 3 Machine body 4 Engine 5 Weeding device 20 Inter-weeding section 21 Inter-row weeding section 40 Rotor 40 ₁ r, 40 ₂ r Rear rotor 40 ₁ f, 40 ₂ f Front rotor U, U ₁ , U ₂ planting (row)
Between B and B ₁

Claims (4)

In a paddy field weeding machine comprising a traveling wheel driven by an engine, a weeding device having a rotor that rotates by contact with the rice field and weeds the stocks and stock lines, and a handle that extends to the rear of the body. ,
The wheel comprises one wheel,
The airframe has a support rod extending in the left-right direction with respect to the traveling direction, and a plurality of mounting arms extending obliquely in the front-rear direction of the support rod are fixed to the support rod, and at both front and rear ends of the mounting arms. Each of the rotor shafts of the rotor is rotatably supported via brackets,
Each of the mounting arms is disposed so as to cross the planting strip in plan view, and a pair of rotors disposed at both front and rear ends of one mounting arm are respectively viewed from the left and right of the planting strip that the mounting arm crosses. Weeding between the stocks of the planting strips and the stock lines,
Two pairs of rotors previous SL wheels to herbicidal the planting conditions of strains and strains Sai of the right and left between strip running, the rotor of the rear respectively, which are arranged to be positioned behind the front SL wheels,
A weeding machine for paddy fields. The front rotors of the pair of rotors disposed at the front and rear ends of each mounting arm are disposed so that at least a part of the wheels overlaps with the wheels in a side view.
The weeder for paddy fields according to claim 1. The rotor has four pairs of rotors for weeding at least four planting strips and between stock lines,
Each of the rotors is arranged to be mirror-symmetric with respect to the plane on which the wheel is located.
The weeding machine for paddy fields according to claim 1 or 2. The weeding device comprises an inter-plant weeding portion having the rotor, and an inter-row weeding portion that is disposed behind the rotor and that weeds between planting strips.
The weeding machine for paddy fields according to any one of claims 1 to 3.

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