JP2010068776A - Paddy weeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paddy weeder which can sufficiently remove weeds grown between ridges in a simple structure. <P>SOLUTION: There is provided the paddy weeder 1 which travels on spaces W between the ridges of a rice-transplanted paddy S and simultaneously jets a pressurized fluid to weed, characterized by comprising a vehicle body 2 having wheels (a steering wheel 5 and rear wheels 6, 6) capable of travel on the spaces W between the ridges, a fluid-pressurizing and supplying mechanism 10 which is loaded on the vehicle body 2 and supplies the pressurized fluid, a flow passage pipe 20 which is communicated with the fluid-pressuring and supplying mechanism 10 and is supported on the vehicle body 2, jet bodies 30 which are disposed at positions not contacting with rice stubbles K at the tip end portions 22b of the flow passage pipe 20 and jet the pressurized fluid toward rice foot lines I, while traveling along the rice foot lines I, and rotors 40 which are placed behind the jet bodies 30 in the vehicle body travel direction F, are arranged in the spaces W between the ridges, are rotated by grounding resistance, and press-bury the weeds scattered by the jetting. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a weeding device for paddy fields that removes weeds that are growing soon in paddy fields. In particular, it is characterized in that weeding between strains, which was difficult to remove by conventional techniques, can be performed simultaneously.

  Usually, paddy fields are planted in paddy fields that have been scratched and softened and weeds have disappeared, but weeds are generated from the seeds on the soil surface of paddy fields when the rice seedlings take root. Therefore, conventionally, weeding devices for paddy fields have been weeded by spraying high-pressure air, water, or other pressure fluid into the paddy fields, and stirring the soil with the paddy field water to blow away the soil covering the roots of the weeds. It is known (see, for example, Patent Document 1).

In this paddy field weeding device, when the inter-strain is detected by a sensor for identifying the presence or absence of a rice strain, a pipe enters between the strains and jets a pressure fluid. In this way, weeding work is carried out by spraying intermittently while avoiding rice. In addition, weeds generated in the ridges are removed by stirring with a rotor that rotates and moves between the ridges along the rice root line.
JP 2002-34305 A

  By the way, in the above-mentioned paddy weeding apparatus, a sensor is used to detect the strain, and weeding between the strains is performed by intermittent injection of pressure fluid, so that the injection control becomes complicated and expensive. It was. Moreover, there was a possibility that weeding could not be sufficiently performed due to sensor accuracy.

  Then, this invention makes it a subject to provide the weeding apparatus for paddy fields which can fully remove the weed which generate | occur | produced between the strain | stump | stocks by simple structure.

  In order to solve the above problems, the present invention is a paddy field weeding device for weeding by spraying pressure fluid while traveling between paddy rice paddies, and a vehicle body having wheels capable of traveling between the paddles, A fluid pressurizing and supplying mechanism mounted on the vehicle body and supplying the pressure fluid; at least one channel tube body communicating with the fluid pressure and supplying mechanism and supported by the vehicle body; and the channel tube A spray port body that is provided at a position that does not come into contact with the rice stock at the tip of the body, and jets the pressure fluid toward the root line of the rice plant, and the jet port body And a rotor which is disposed in the rear of the vehicle body and which is disposed between the ribs and which pushes the weeds blown by the spray while rotating by grounding resistance.

  The rotor may have a number of fins in contact with the bottom surface of the paddy field on the outer periphery, and may have a substantially cylindrical outer shape that is movable while rotating between the ribs.

  Further, the vehicle body may be mounted with a position adjusting mechanism that adjusts the injection destination of the injection port body so as to follow the rice root line.

  Therefore, in the paddy field weeding apparatus of the present invention, for example, when weeding while traveling in the paddy field along the furrows, the wheel travels between the furrows and the spray port body is provided at a position where it does not contact the rice plant. As a result, the paddy weeding device will not damage the rice stock. And as the body moves, along the rice root root line, the pressure fluid is sprayed from the spray nozzle toward the rice root root line, so that the pressure fluid enters between the strains and rinses the roots of the weeds. Can be suspended in water. In addition, weeds between the strains floating in the water by the pressure fluid can be prevented from being rooted and growing again by being buried in the paddy field by the rotor located behind the spray body in the traveling direction. As a result, weeds generated between the strains can be sufficiently removed with a simple configuration.

  In addition, if the rotor has a large number of fins in contact with the soil and has a substantially cylindrical outer shape that can move while rotating between the furrows, the rotor can move while reliably filling weeds. it can.

  Furthermore, if the vehicle body is equipped with a position adjustment mechanism that adjusts the injection destination of the injection port body along the rice root root line, it is a case where irregularities on the bottom of the paddy field or meandering of the vehicle body occur. However, the spray port body can make the spray destination along the root line of the rice plant and prevent the weed removal accuracy from being lowered.

  BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment of a paddy field weeding apparatus 1 according to the present invention will be described with reference to the drawings. In addition, the direction shown by the arrow F in FIG.1 and FIG.2 is the advancing direction of the vehicle body 2 of the weeding apparatus 1 for paddy fields.

  This paddy weeding apparatus 1 is an example of a weeding machine for a vehicle body 2, a fluid pressurizing and supplying mechanism 10 mounted on the car body 2, and at least one, in this case, a four-row weeder connected to the fluid pressurizing and supplying mechanism 10. A flow path tube body 20 having a tip portion branched into four, an injection port body 30 provided at each of the branched tip portions of the flow path tube body 20, and a rear side of the injection body 30 in the vehicle body traveling direction F And a lifting device 50 that adjusts the height positions of the injection port body 30 and the rotor 40.

  The vehicle body 2 includes a frame 2b, a handle 4 attached to the frame 2b, a steered wheel (wheel) 5 operated by the handle 4, and a pair of rear wheels (wheels) 6 provided at the rear of the frame 2b. 6 (see FIG. 2) and a support frame 2c that is located between the steering wheel 5 and the rear wheels 6 and 6 and extends downward from the frame 2b. The vehicle body 2 is provided with a seat 2a on which an occupant is seated and an engine (not shown), and the rear wheels 6 and 6 are driven by the engine so that they can run on their own. In addition, the steering wheel 5 and the rear wheels 6 and 6 are provided at intervals corresponding to the intercostal spaces (rows) W (see FIG. 2) of a large number of rice stocks K planted in the paddy field S. It is possible to travel in the paddy field S along the furrow W.

  Here, “Sakuma W” refers to a fixed interval determined by the rice transplanter, and “Strain P” is an arbitrary number of adjustment stages among the multistage adjustment stages incorporated in the rice transplanter. It refers to the planting pitch that can be selected. Further, the “rice plant root line I” is a line connecting the roots of the rice plant K along the furrow W. In general, rice is planted along the traveling direction of the rice planting machine, and the planting interval of the rice at this time is defined as the inter-plant P, and the traveling position of the rice planting machine orthogonal thereto is defined as the intercostal space W (see FIG. 2). ).

  The fluid pressurizing and supplying mechanism 10 supplies water in a high pressure state by applying pressure, and the pair of water storage tanks 12 and 12 (see FIG. 2) and the water in the water storage tanks 12 and 12 are supplied. It has a pressure feed pump 13 that pressurizes and discharges, and a prime mover 14 that drives the pressure feed pump 13.

  The pair of water storage tanks 12, 12 store water injected into the paddy field S, and are arranged so as to sandwich the frame 2 b of the vehicle body 2, and the steered wheels 5 and the drive wheels 6, 6 are arranged. It is attached between.

  The pressure feed pump 13 and the prime mover 14 are respectively disposed above the water storage tanks 12 and 12, and each water storage tank 12 and the pressure feed pump 13 communicate with each other via a suction pipe 12a. Note that both ends of the suction pipe 12 a are inserted deeply into the pair of water storage tanks 12, 12, and are branched from the center and connected to the pressure pump 13. The pumping pump 13 and the prime mover 14 are connected by a power line (not shown).

  At least one flow channel body 20 is provided that communicates with the pressure pump 13 of the fluid pressurization supply mechanism 10 and serves as a flow channel through which the pressure fluid (high pressure water in this case) flows. In this case, the flow channel body 20 is generally composed of a branch pipe 21 connected to the discharge port 13 a of the pressure feed pump 13 and four hose bodies 22 connected to the branch pipe 21. (See FIG. 3).

  The branch pipe 21 is made of a tube material having such a rigidity that it is not deformed by a pressure fluid flowing inside a hard plastic, stainless steel, or the like, and extends horizontally along a direction orthogonal to the vehicle body traveling direction F, and a horizontal part 21b. , A connecting portion 21a branched in the horizontal direction along the traveling direction F, and four vertical portions 21c branched in the vertical direction from the horizontal portion 21b.

  As for the connection part 21a, the open end part 21d (refer FIG. 3) is connected to the discharge outlet 13a via the band etc. which are not shown in figure. On the other hand, the four vertical portions 21c,... Are formed at regular intervals in the longitudinal direction of the horizontal portion 12b, and extend downward here. Moreover, the internal diameter of each vertical part 21c is thinner than the internal diameter of the connection part 21a and the horizontal part 21b.

  The hose body 22 is a so-called rubber hose formed of flexible rubber or the like, and is attached to the vertical portion 21c via a connection portion 23 provided on the one end portion 22a. Further, an injection port body 30 is provided at the tip end portion 22 b of the hose body 22. The inner diameter of the hose body 22 is thinner than the inner diameter of the vertical portion 21c.

  As shown in FIG. 4, the ejection port body 30 includes a cap 31 attached to the tip 22 b of the hose body 22 and a discharge opening 32 formed in the cap 31. The cap 31 is fixed to the tip 22b of the hose body 22 by press-fitting the hose body 22. The discharge opening 32 has an inner diameter sufficiently thinner than the inner diameters of the hose body 22 and the cap 31.

  As shown in FIG. 5, the rotor 40 has a substantially cylindrical outer shape that can move while rotating the gap W, and a pair of end disks 41, 41 located at both ends, and the end circles. A plurality of fins 42, spanned between the plates 41, 41, and a central shaft 43 that penetrates the centers of the pair of end disks 41, 41.

  The plurality of fins 42 are made of a strip-shaped steel plate that is twisted and whose overall length is shorter than the width of the gap W, and both ends are fixed to the peripheral edge of each end disk 41 so that the outer periphery of the rotor 40 Located in. Further, both ends of the central shaft 43 are supported by a rotor support 56 (to be described later) of the elevating device 50 and penetrate the pair of end disks 41 and 41 in a rotatable state. As a result, when the rotor 40 contacts the bottom surface Sa of the paddy field S, the rotor 40 rotates due to the contact resistance between the fins 42 and the bottom surface Sa, and the bottom surface Sa is agitated while preventing excessive settling into the soil.

  The elevating device 50 detects the water depth to the bottom surface Sa of the paddy field S and changes the support height of the injection port body 30 and the rotor 40 according to the detected water depth, from the bottom surface Sa to the injection port body 30 and the rotor 40. The distance is adjusted to be almost constant.

  The lifting device 50 includes a device main body 51 supported at the tip of the support frame 2c, an arm portion 52 held by the device main body 51 so as to be movable up and down, and held by the arm portion 52, and also in a traveling direction F. , A connecting rod 53 extending horizontally along a direction orthogonal to each other, three supports 54 fixed to the connecting rod 53, a sliding plate 55 attached to a front portion 54a of each support 54, and each support It has a rotor support 56 formed at the rear part 54 b of the body 54 and a hose support 57 formed at the intermediate part of each support 54.

  The apparatus main body 51 has a water depth detection sensor (not shown), and moves the arm portion 52 up and down according to the detection result. Thereby, the connecting rod 53, each support body 54, the sliding board 55, and the rotor support body 56 are adjusted so that the distance from the bottom face Sa of the paddy field S may become constant.

  In addition, the connecting rod 53, each support 54, the sliding plate 55, and the rotor support 56 are each formed of a material having a predetermined strength such as hard plastic or steel plate. The three supports 54 are arranged at equal intervals along the longitudinal direction of the connecting rod 53, and those located on both sides are located in front of the rear wheels 6 and 6 in the vehicle body traveling direction F and located in the center. Are located behind the steering wheel 5 in the vehicle traveling direction F and extend along the vehicle traveling direction F, respectively.

  The hose support portion 57 protrudes to the side of the support body 54, that is, in a direction orthogonal to the vehicle body traveling direction F and then extends downward, and the injection destination of the injection port body 30 extends along the rice root base row line I. Hold to let it. That is, the hose support portion 57 serves as a position adjustment mechanism that adjusts the position of the injection destination of the injection port body 30. In addition, in the support body 54 located in the center, a pair of hose support parts 57 and 57 are protrudingly formed in the mutually opposite direction.

  Further, the hose body 22 is fixed to the connecting rod 53, each support body 54, and the hose support portion 57 by a band or the like, and the injection port body 30 slightly protrudes from the tip of the hose support portion 57. At this time, the spray body 30 is provided at a position that is located behind the steering wheel 5 in the traveling direction F or forward of the rear wheels 6 and 6 and does not come into contact with the rice stock K. It is adjusted to a state where the pressure fluid can be ejected toward the line I, that is, a state where it is directed downward from the horizontal direction so as to face the root of the rice stock K. Further, the rotor support 56 holds both ends of the central shaft 43 of the rotor 40.

  Next, the effect | action of the weeding apparatus 1 for paddy fields based on this invention is demonstrated.

  In order to use this paddy field weeding apparatus 1, first, the pair of water storage tanks 12 and 12 are filled with water.

  Here, a flow pipe 21 is connected in advance to the pressure feed pump 13, and four hose bodies 22, each having an injection port 30 attached thereto are connected to the vertical portions 21 c of the flow pipe 21. Has been. Moreover, each hose body 22 is fixed to the connecting rod 53, the support body 54, and the hose support portion 57 supported by the lifting device 50, and is held in a state in which the injection port body 30 is directed downward from the horizontal direction.

  Then, the vehicle 2 is driven to enter the paddy field S. At this time, as shown in FIG. 2, the steering wheel 5 and the pair of rear wheels 6 and 6 are operated so as to travel along the furrow W so that they do not contact the rice plant K.

  On the other hand, each jet body 30 is provided at a position not behind the traveling direction F of the steering wheel 5 or in front of the traveling direction F of the rear wheels 6, 6 and in contact with the rice plant K. Regardless, the rice plant K is never touched.

  And while driving the vehicle body 2 along the gap W, the prime mover 14 is driven to operate the pressure feed pump 13. The operated pumping pump 13 simultaneously sucks up substantially the same amount of water from both of the pair of water storage tanks 12 and 12 through the suction pipe 12a, applies pressure to the high pressure state, and supplies it to the flow path pipe 21.

  The high-pressure water supplied from the pressure pump 13 flows from the flow path pipe 21 to the hose body 22 and is ejected from the distal end portion 22b of the hose body 22 through the discharge opening 32 of the ejection port body 30.

  Thereby, the injection port body 30 moves in the direction indicated by the arrow F in FIG. 1 along the rice root line I while jetting the high-pressure water supplied from the pumping pump 13 from the discharge opening 32. Become.

  At this time, the discharge opening 32 of the injection port body 30 is adjusted to be fixed to the hose support 57 along the rice plant root row line I so that the rice plant root row line I becomes the injection destination. . Moreover, about the height position of the injection nozzle body 30, the distance with the bottom face Sa of the paddy field S is set arbitrarily arbitrarily, and the height of the connecting rod 53 and the support body 54 is raised by the elevating device 50 as the vehicle body 2 travels. Is automatically adjusted to make the distance from the bottom surface Sa constant.

  The water sprayed from the discharge opening 32 is sprayed toward the rice root root line I along the rice root base line I. The relative position with respect to 32 changes, and high-pressure water can be sprayed between the stocks P. Then, high-pressure water is sprayed toward the roots of the weeds generated in the inter-strain P, and the roots of the weeds can be rinsed and suspended in water for reliable weeding.

  In addition, the weeds of the inter-strain P that have been blown off by the pressure fluid and floated in the water are embedded in the soil by the rotor 40. Further, the weeds generated in the intercostal spaces W are also crushed by the rotor 40 located behind the injection port body 30 and embedded in the bottom surface Sa of the paddy field S.

  Thus, in the injection nozzle body 30 of the above-mentioned embodiment, weeds generated in the inter-strain P and the intercostal space W can be reliably removed with a simple structure. In particular, weeds up to the second leaf stage have weak rooting power, and therefore can be easily suspended even at a water pressure that does not damage the rice plant K.

  Here, since the inner diameter of the connecting portion 21a, the horizontal portion 21b, each vertical portion 21c, and the hose body 22 of the flow channel pipe 21 is gradually narrowed, the flow rate of water flowing through the inside gradually increases and the water pressure decreases. Thus, water can be ejected vigorously from the discharge opening 32 of the ejection orifice body 30. Therefore, the soil covering the roots of weeds can be sufficiently removed. Furthermore, the influence which water gives to the rice stock K can further be reduced by adjusting the injection pressure of the water supplied from the pumping pump 13.

  Moreover, in the above-mentioned embodiment, although water is used as a pressure fluid, since the kinetic energy is larger than air, the weeding effect becomes high.

  Further, in the above-described embodiment, the rotor 40 has a large number of fins 42,... That contact the bottom surface Sa of the paddy field S on the outer periphery, and has a substantially cylindrical outer shape that can move while rotating the furrow W. Yes. As a result, weeds can be reliably buried by the rotor 40, and the rice stock K and the rotor 40 can move without contact.

  And in the above-mentioned embodiment, the hose support body 57 which is a position adjustment mechanism which adjusts the injection destination of the injection nozzle body 30 along the rice root base row line I is mounted in the vehicle body 2. Thereby, even if the unevenness of the bottom surface Sa and the meandering of the vehicle body 2 occur, the high-pressure fluid ejected from the ejection orifice body 30 can be ejected toward the vicinity of the rice root line I. Therefore, weeds generated in the vicinity of the rice plant root row I can be weeded, and a reduction in the weeding accuracy can be prevented.

  In the above-described embodiment, the flow channel body 20 has the four flow channel tubes 22, and the injection port body 30 is attached to each distal end portion 22 b, so that the four flow channel tubes 22 are provided. ,... Are adjusted so as to match the size of the wrinkles W, so that the weeding operations of the plurality of wrinkles W and the stocks P can be performed simultaneously.

  As mentioned above, although embodiment concerning this invention has been explained in full detail with drawing, a concrete structure is not restricted to the above-mentioned embodiment. Design changes and the like within the scope not departing from the gist of the present invention are included in the present invention.

  In the above-described embodiment, high-pressure water is used as the pressure fluid, but air may be used, for example.

  In this case, a compressor is used as a pressure feed pump, and the compressor and a pressure adjusting reservoir tank are mounted on the vehicle body 2. Since the air supplied to the compressor is sucked from the atmosphere, it can be supplied infinitely.

  In the above-described embodiment, the fluid pressurizing and supplying mechanism 10, the flow path tube body 20, and the injection port body 30 are mounted on the vehicle body 2 that can be driven by the driver and run in the paddy field S. However, it is not limited to this.

  For example, the fluid pressure supply mechanism 10 or the like may be mounted on a handcart type vehicle body that is moved while being pushed by an operator with an operation handle. In this case, even a small paddy field that does not contain a self-propelled vehicle body can be handled easily.

  Furthermore, in the above-described embodiment, the flow path tube body 20 has a configuration in which the tip portion is branched into four. However, a plurality of flow path tube bodies whose front ends are not branched are divided into the fluid pressure supply mechanism 10. You may connect to each. In this case, the structure of the channel tube body is simplified, and the structure can be further simplified.

It is a side view which shows the weeding apparatus for paddy fields based on this invention. It is a top view which shows the weeding apparatus for paddy fields shown in FIG. It is a perspective view which shows the principal part of the weeding apparatus for paddy fields shown in FIG. It is a perspective view which expands and shows an injection nozzle body. It is a perspective view which expands and shows a rotor.

Explanation of symbols

1 Weeding device for paddy field 2 Car body 5 Steering wheel (wheel)
6 Rear wheels
DESCRIPTION OF SYMBOLS 10 Fluid pressurization supply mechanism 20 Flow path pipe body 30 Injection hole body K Rice stock W Sakuma P Sumi I I Rice root root line

Claims (3)

A weeding device for paddy fields that weeds by jetting pressure fluid while traveling between paddy fields.
A vehicle body having wheels capable of traveling between the ridges, a fluid pressure supply mechanism that is mounted on the vehicle body and supplies the pressure fluid, and at least one that is communicated with the fluid pressure supply mechanism and supported by the vehicle body A flow channel body of the book, and the pressure fluid that is provided at a position that does not contact the rice stock at the tip of the flow channel tube, and is directed toward the rice root root line while being along the rice root root line. And a rotor that is located behind the injection body in the direction of travel of the vehicle body and that is disposed between the troughs and that pushes the weeds blown by the injection while rotating by ground resistance. A weeding device for paddy fields. In the weeding device for paddy fields according to claim 1,
The paddy field weeding apparatus characterized in that the rotor has a large number of fins in contact with the bottom surface of the paddy field on the outer periphery and has a substantially cylindrical outer shape that can move while rotating between the ribs. In the weeding apparatus for paddy fields according to claim 1 or claim 2,
The paddy field weeding apparatus, wherein the vehicle body is equipped with a position adjustment mechanism for adjusting the spray destination of the spray nozzle body along the rice root base line.

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