JP4367619B2 - Paddy weeder - Google Patents

Description

  The present invention belongs to a technical field related to a weeder for paddy fields that weeds the weeds that grew around the seedlings planted in the paddy fields.

  Recently, paddy field weeding uses a rice transplanter with a seedling planting mechanism pulled by a traveling body, and replaces the seedling planting mechanism and weeding mechanism with the traveling body to pull the weeding work time. Is shortened.

Conventionally, as a paddy field weeder, for example, those described below are known.
In JP-A-2000-41410, in Patent Literature 1, a streak weeding mechanism for weeding between streaks of planted seedlings and a weeding mechanism for interstitial weeding between stumps of planted seedlings are pulled to the traveling aircraft, , A paddy field weeding machine is described in which the inter-plant weeding mechanism is rotated by the power transmitted from the traveling machine body.

  The paddy field weeding machine according to Patent Document 1 uses a rice transplanter by pulling the seedling planting mechanism, the streak weeding mechanism, and the inter-plant weeding mechanism to the traveling machine body, and does not damage the planted seedling. Therefore, it is described that the working depth (cultivation depth) of the inter-row weeding mechanism and the inter-strain weeding mechanism is adjusted.

  In the paddy weeding machine according to Patent Document 1, the rice plants planted by the rice planting machine are arranged with a predetermined left-right interval (inter-row) and a predetermined front-rear interval (inter-strain), but between each unit of planting May be indeterminate by the visual sense of the rice planting operator, and the streak may be too narrow to allow the streak weeding mechanism to work. In addition, since the weeding mechanism is forcibly driven, the inter-weeding mechanism is arranged away from the planted seedling in order to avoid damage to the planted seedling, so that weeds are easily left behind. Moreover, since the working depth of the weeding mechanism between the streak and the inter-strain weeding mechanism must be adjusted individually, it takes time to adjust the working depth of the weeding. Therefore, there is a problem that supplementary weeding work by human power or the like is required or preparation work for weeding takes time, and shortening of the weeding work time cannot be sufficiently achieved. is there.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a paddy field weeder that can sufficiently shorten the weeding time.

  In order to solve the above-described problems, the paddy field weeding machine according to the present invention employs the means described in the claims.

That is, the present invention relates to a paddy field weeding machine having a traveling machine body towed with a streak weeding mechanism for weeding the stumps of planted seedlings, wherein the streak weeding mechanism is a non-driven rotor that rotates by grounding resistance between the streaks. Are arranged in parallel, and the rotors located at both ends of the parallel can be retracted upwards independently by the retracting mechanism . The retraction mechanism includes an arm that supports the rotor at a rear end, a tilting operation lever disposed on the traveling machine body side, and a multi-point link arm that connects the arm and the operation lever. Have.

  In this means, the rotors at both ends disposed between the narrowed seedling strips are retracted upward, and the other rotors enter between the strips in one unit of seedling planting.

The rotor located at both ends of the parallel rows, wherein the width in the axial direction is shorter than the other rotor.

  According to this means, when the interval between the planting units is slightly narrowed, the rotors at both ends can easily enter the interval.

Further, the conditions between the herbicide mechanism and strains herbicidal mechanism and for paddy field herbicides machine is towed with the herbicidal between strains of planting seedlings of herbicidal between conditions of planting seedlings run line airframe strains herbicidal mechanism grounding resistance between strains A non-drive type impeller that rotates by rotating is provided, and the impeller is characterized in that a plate is provided radially on a rotating shaft that is inclined downward from above the planted seedling.

  In this means, since the impeller is non-driven, the planted seedling is not damaged even if the impeller is brought close to the planted seedling.

  Moreover, the front-end | tip part of an impeller is adjoined to the root part of a planting seedling.

The plate constituting the blade roots vehicles, the front end portion, characterized in that掻片bent toward the rear side in the rotation direction due to the forward movement of the traveling machine body is provided.

  In this means, scrapes at the tip of the impeller plate close to the root part of the planted seedling scrape off the mud together with the weeds, and then cover the mud.

  The paddy field weeding machine according to the first aspect of the present invention is a seedling that is mechanically fixed by retracting the rotors at both ends disposed between the strips between the narrowing seedling planting units upward. Supplementary weeding work by human power, etc., because other rotors can enter between the lines in one unit of planting, and the distance between the lines is too narrow to operate the line weeding mechanism. Therefore, it is possible to sufficiently shorten the weeding time. Further, as claimed in claim 2, when the space between the planting units is slightly narrowed, it becomes easy to allow the rotors at both ends to enter the space, so that the space is too narrow and the space weeding mechanism There is an effect that it is almost impossible to let you work.

  Furthermore, the weeding machine for paddy fields according to the present invention of claim 3 does not damage the planting seedling even if the impeller is non-driven and the impeller is brought close to the planting seedling, and weeds are left behind. Since there is no need for supplementary weeding work by human power or the like, it is possible to sufficiently shorten the weeding work time. Moreover, since the front-end | tip part of an impeller is adjoined to the root part of a planting seedling, there exists an effect which does not damage the stem etc. of a planting seedling in the other part of an impeller. Further, as claimed in claim 4, scrapes at the tip of the impeller close to the root part of the planted seedling scrape mud together with the weeds and embed them in the soil, blocking the photosynthesis and respiration of the weeds. To obtain a herbicidal effect.

  Hereinafter, the best mode for carrying out the paddy weeder according to the present invention will be described with reference to the drawings.

  FIGS. 1-16 shows the 1st example of the best form for implementing the weeder for paddy fields based on this invention.

  In the first example, one using a six-row rice transplanter is shown.

  As shown in FIG. 1, the first example is configured such that the interstitial weeding mechanism 5 and the inter- stock weeding mechanism 6 are pulled by the traveling machine body 1 through the connecting mechanism 2, the main frame 3, and the support base 4.

  The traveling machine body 1 is of a riding type in which an engine 1b is mounted on the front portion of the vehicle body 1a and a seat 1c is installed on the rear portion, and the vehicle travels on the front wheels 1d and the rear wheels 1e. About this traveling machine body 1, planting of the connection mechanism 2, the main frame 3, the support base 4, the interrow weeding mechanism 5, the inter-plant weeding mechanism 6 or at least the support base 4, the inter-row weeding mechanism 5, the inter-plant weeding mechanism 6 It is used for rice transplanters by substituting for the mechanism.

  As shown in FIG. 2, the connecting mechanism 2 connects the main frame 3, the support base 4, the inter-row weeding mechanism 5, the inter- stock weeding mechanism 6, and the like to the traveling machine body 1 so as to be movable up and down. The four-point link arm 2a spanned between the main frame 3 and a hydraulic device (not shown) that drives the four-point link arm 2a to expand and contract.

  The main frame 3 has a box shape that supports the support base 4, the inter-row weeding mechanism 5, the inter-strain weeding mechanism 6 and the like, and continuously extends in the width direction of the traveling machine body 1 (see FIGS. 3 and 4). ).

  A float mechanism 7 and a leveling mechanism 8 are attached to the lower part of the main frame 3. The float mechanism 7 includes a float plate 7a that slides on the surface of the mud B accumulated on the surface A, an attachment member 7b that attaches the float plate 7a to the main frame 3 so that the vertical position can be adjusted, and the float plate 7a It consists of a transmission member 7 c that transmits the movement (vertical movement) to the hydraulic equipment of the coupling mechanism 2. The leveling mechanism 8 includes an arm for leveling the wheel marks on the mud B of the front wheel 1d and the rear wheel 1e of the traveling machine body 1.

  A left / right balance mechanism 9 is attached to the upper part of the main frame 3. The left / right balance mechanism 9 automatically adjusts the left / right (width direction) balance of the main frame 3 with respect to the coupling mechanism 2. That is, even if the rice transplanter body is tilted, the weeder itself is a mechanism for keeping it parallel to the rice field.

  The support base 4 is composed of a box shape that supports the inter-row weeding mechanism 5 and the inter-plant weeding mechanism 6, and six support bases 4 are arranged in parallel in the width direction of the traveling machine body 1 corresponding to the six-row planting (see FIG. 3). .

  Between the main frame 3 and the support base 4, a working depth uniform adjustment mechanism 10 is attached. The working depth uniform adjustment mechanism 10 adjusts the weeding working depth of the inter-row weeding mechanism 5 and the inter-strain weeding mechanism 6 by moving the inter-row weeding mechanism 5 and the inter-strain weeding mechanism 6 up and down in parallel. A multi-point link arm 10a spanned between the main frame 3 and the support base 4 and a rotary operation handle 10b supported by the main frame 3 to expand and contract the multi-point link arm 10a (FIGS. 8 and 8). 9).

  The inter-row weeding mechanism 5 is for weeding the inter-rows of the planted seedling C, and a rotor in which a total of 7 pieces, 5 pieces between the support bases 4 and 1 piece outside the both ends of the support base 4 are arranged in parallel. 5a (see FIG. 3). As shown in detail in FIG. 6, the rotor 5 a is formed in a cage shape in which bars 5 a ′ parallel to the axis are radially arranged and bearings 5 a ″ are provided at both ends. 5a ″ is supported by the support base 4 by the arm 5b supported, and is a non-driven type that rotates by ground resistance between the strips. The arm 5b is attached to the support base 4 so as to be able to rise and fall, and is biased downward (downward direction) by a coil spring 5c. The axial width of the two rotors 5a at the left and right ends is shorter than the axial width of the central five rotors 5a (see FIGS. 3 and 4).

  Between the main frame 3 and the streak weeding mechanism 5, a working depth relative adjusting mechanism 11 and a retracting mechanism 12 are attached. The working depth relative adjustment mechanism 11 adjusts only the weeding working depth of the streak weeding mechanism 5, and includes a multipoint link arm 11a spanned between the main frame 3 and the support base 4, and a plurality of points. A connecting arm 11b that connects the link arm 11a and the arm 5b of the interstitial weeding mechanism 5, a tilt-type operating lever 11c that is supported by the main frame 3 and that expands and contracts the multipoint link arm 11a, and an operating range of the operating lever 11c A stopper 11d for restricting the operation, a meshing structure 11e for fixing the operating position of the operating lever 11c, a coil spring 11f for elastically biasing the meshing of the meshing structure 11e, and releasing the elastic pressure of the coil spring 11f adjacent to the operating lever 11c. It consists of the 2nd operation lever 11g to operate (refer FIGS. 11-13). The retreat mechanism 12 retreats the two rotors 5a at the left and right ends of the inter-row weeding mechanism 5 upward, and the arm 5b that supports the main rotor 3 and the two rotors 5a at both the left and right ends of the inter-row weeding mechanism 5. And a tilt-type operation lever 12b connected to the multi-point link arm 12a for expanding and contracting the multi-point link arm 12a (see FIG. 10). In addition, since the streak weeding mechanism 5 is non-driven and does not need to consider the drive transmission structure, the retracting mechanism 12 can be configured easily.

The inter-strain weeding mechanism 6 is for weeding between the plants of the planted seedling C, and is provided with a pair of six impellers 6a that rotate by the ground resistance between the strains. As shown in FIGS. 3, 4, and 7, the impeller 6 a is configured such that a plate 6 a ′ is radially provided on a rotating shaft 6 a ″ having an inclination that is spaced downward from above the planted seedling C. The impeller 6a is attached to the support base 4 by an arm 6b, and the tip of the plate 6a 'of the impeller 6a. Is provided with a scraping piece 6c bent toward the rear side in the rotational direction accompanying the forward movement of the traveling machine body .

  According to the first example, as shown in FIG. 2, the traveling machine body 1 is caused to travel by raising the main frame 3, the support base 4, the inter-row weeding mechanism 5, the inter- stock weeding mechanism 6, etc. to go into. The main frame 3, the supporting base 4, the inter-row weeding mechanism 5, the inter- stock weeding mechanism 6 and the like are lowered by the connecting mechanism 2 as shown in FIG. 5. Adjust the working depth of the inter-strain weeding mechanism 6 simultaneously (see FIGS. 8 and 9). Accordingly, it takes less time to adjust the working depth of weeding and it takes less time to prepare for weeding, so that the working time of weeding can be shortened.

  Thereafter, weeding is performed by traveling the traveling machine body 1. At this time, the inter-plant weeding mechanism 6 is non-driven and there is no possibility of damaging the planted seedling C, and the impeller 6a can be disposed in close proximity to the planted seedling C, so that weeds are not left behind. Further, the scrap 6c of the inter-plant weeding mechanism 6 is brought close to the vicinity of the root of the planted seedling C to remove the mud B (see FIG. 7), and the rotor 5a of the inter-row weeding mechanism 5 The weeds pulled out by the bar 5a 'are buried in the mud B. Accordingly, weeds are not left behind, and supplementary weeding work by human power or the like is almost unnecessary, so that the time for weeding can be shortened. In addition, when the traveling machine body 1 stops, the rotor 5a of the streak weeding mechanism 5 and the impeller 6a of the interstitial weeding mechanism 6 automatically stop, so that the planted seedling C is not damaged unnecessarily. . Further, even if the scrap 6c of the inter-strain weeding mechanism 6 scrapes off the mud B, the new mud B immediately flows from the surroundings, so that the roots of the planted seedling C are not exposed.

  In the weeding operation in which the traveling machine body 1 travels, the main body regardless of the vertical movement of the traveling machine body 1 due to the change in the depth of the mud B or the like by the linkage between the hydraulic device of the coupling mechanism 2 and the transmission member 7c of the float mechanism 7. The height on the mud B of the frame 3, the support base 4, the streak weeding mechanism 5, the inter-strain weeding mechanism 6 and the like is kept constant. Further, when the mud B is caught on the rotor 5a of the streak weeding mechanism 5 due to the depth of the mud B and the rotation is impossible, the rotor 5a of the streak weeding mechanism 5 is moved by the working depth relative adjustment mechanism 11. It is only necessary to pull it up slightly (see FIG. 13).

  Further, in the weeding work in which the traveling machine body 1 is run, weeding in the streak a between each unit of seedling planting by the rice transplanter is performed by the narrow rotor 5a of the streak weeding mechanism 5, The remnant surface D of the weeds in the forward path can be eliminated by reciprocating the striation a (see FIGS. 3 and 15). In addition, when this space | interval a is a little narrower than the space | interval b in 1 unit of planting of the seedling by a rice transplanter, weeding is possible as it is with the narrow rotor 5a of the space weeding mechanism 5. In addition, when the streak a is a very narrow streak b in one unit of seedling planting by a rice transplanter, the rotor having a narrow width at both ends of the streak weeding mechanism 5 located in the streak a by the retraction mechanism 12 Work can be performed by running the traveling machine body 1 in a state where 5a is avoided upward (see FIGS. 10 and 15), and the weeding time can be shortened.

  17 and 18 show a second example of the best mode for carrying out the paddy field weeding machine according to the present invention.

  In the second example, a part of the multipoint link arm 10a of the working depth equalization adjusting mechanism 10 of the first example described above is replaced with a pulling posture adjusting mechanism 13 including a screw rod 13a and a sleeve nut 13b.

  According to the second example, by adjusting the length of the traction posture adjusting mechanism 13, even if the vehicle body 1 a of the traveling machine body 1 is inclined, the inclination angle θ is absorbed and the interstitial weeding mechanism 5 and the inter-plant weeding mechanism 6 are absorbed. Can be corrected to a parallel state.

  As described above, in addition to the illustrated examples, it is possible to select a non-riding vehicle as the traveling machine body 1.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a first example of the best mode for carrying out a paddy weeder according to the present invention. It is an operation | movement diagram of the principal part of FIG. It is an enlarged plan view of the principal part of FIG. It is an enlarged side view of the principal part of FIG. FIG. 4 is a partially enlarged view of FIG. 3. FIG. 6 is a partially enlarged view including the cut in FIG. 5. FIG. 5 is a partially enlarged view of FIG. 4. FIG. 2 is a partially enlarged view of FIG. 1. FIG. 9 is an operation diagram of FIG. 8. FIG. 9 is another operation diagram of FIG. 8. FIG. 9 is a partially enlarged view of FIG. 8. FIG. 12 is an operation diagram of FIG. 11. FIG. 9 is still another operation diagram of FIG. 8. It is a perspective view which shows the some operation | movement pattern of FIG. It is a top view which shows the weeding work example by FIG. It is a top view which shows the other weeding work example by FIG. It is a front view of the principal part which shows the 2nd example of the best form for implementing the weeder for paddy fields concerning this invention. FIG. 18 is a simplified diagram illustrating the adjustment principle of FIG. 17.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Connection mechanism 3 Main frame 4 Support base 5 Inter-row weeding mechanism 6 Inter-plant weeding mechanism 10 Working depth equality adjusting mechanism 11 Working depth relative adjusting mechanism 12 Retraction mechanism 13 Pulling posture adjusting mechanism B Mud C Planting seedling

Claims (4)

In the paddy field weeding machine towing the streak weeding mechanism that weeds the streak of planted seedlings behind the traveling machine body with a seat ,
The inter-row weeding mechanism has a plurality of non-driven rotors that rotate by ground resistance between the inter-rows,
Rotor positioned in parallel at both ends, Ri retractable der independently upward by respectively retracting mechanism,
The retracting mechanism includes an arm that supports the rotor at a rear end, a tilting operation lever disposed on the traveling machine body side, and a multipoint link arm that connects the arm and the operation lever. ,
Weeding machine for paddy field. The rotor located at both ends of the parallel, the width in the axial direction is shorter than the other rotor,
The paddy weeder according to claim 1 . An inter-strain weeding mechanism for weeding between the planted seedlings is arranged by pulling the traveling machine body between the traveling machine body and the inter-row weeding mechanism,
The strains herbicidal mechanism includes a non-driven impeller rotates by ground resistance between strains,
The impeller is formed by radially providing a plate on a rotating shaft having an inclination that is spaced downward from above the planted seedling .
The weeding machine for paddy fields according to claim 1 or 2 . Plate constituting the impeller, the tip掻片bent toward the rear side in the rotation direction due to the forward movement of the traveling machine body is provided,
The weeding machine for paddy fields according to claim 3 .

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