JP4866051B2 - Weeder - Google Patents

Description

  The present invention relates to a weeding machine for removing weeds in a field after planting seedlings.

Conventionally, rakes for weeding made of a plurality of hook-shaped elastic bodies (tines) are known (see, for example, Patent Document 1 and Patent Document 2). The rake has a structure in which weeding is performed by inserting each tine into a field between strains and moving it along a seedling row.
Japanese Patent Laid-Open No. 2000-50702 Japanese Patent No. 3280925

  In general, during pesticide-free cultivation in paddy fields, it is necessary to carry out the first weeding about 10 days after transplanting, and then 3 to 4 times in total every about 10 days. The seedlings of seedlings immediately after transplantation are extremely weak and can be easily fallen by tine during the first and second weeding. Since seedlings may cause growth failure due to lodging, it is necessary to reduce the elastic action range of tine on seedlings and avoid lodging by tine during weeding.

  On the other hand, when weeding for the third to fourth times, weeds have strong roots. Therefore, weeding may be incomplete if the elastic action width of tine on the seedling is small. However, at the 3rd to 4th weeding time, the seedlings of the seedlings are also strong, so the seedlings will not easily fall down by tine at the time of weeding, increasing the elastic range of action of tine on the seedlings, It is necessary to increase the effectiveness of herbicidal action. For this reason, a rake capable of performing the above two operations has been desired.

In the weeding machine of the present invention for solving the above-mentioned problems, the weeding machine 16 provided with the rakes 38, 39, 41, 42 made of an elastic material is connected to the traveling machine body 1, and the inter-plant side of the planted seedlings is connected. In the weeding machine in which the rakes 38, 39, 41 , 42 are arranged so that the tips are located in the vicinity of the stock so as to weed , the weeding work machine 16 is connected to the rear of the traveling machine body 1 , and the rakes 38, 41 Adjusters 45L and 45R for adjusting the elastic action width on the seedlings are provided , and the adjusters 45L and 45R increase the rigidity of the rakes 38 and 41 as the action width A increases. The rakes 38, 39, 41, 42 are arranged at the front and rear, and the front rakes 38, 41 are mainly configured for weeding between the strains, and the rear rake 39, 42 is the side close to the stock The herbicidal when strain is being primarily configured to perform, the rear of the first, characterized in that it has less than the elastic force of the elastic force of the rake 39 and 42 the front of the rake 38, 41.

Secondly, the rakes 38 and 41 are formed by symmetrically forming a bowl-shaped elastic material TI that is curved, and adjusters 45L and 45R are provided on both the left and right elastic materials TI.

  According to the structure of the present invention configured as described above, weeding of seedlings in a state where the plant stock is weak immediately after transplanting is performed by shortening the action width, thereby preventing the fall of seedlings during weeding by rake. When the seedlings of seedlings become stronger and the roots of weeds become stronger after transplanting, the herbicidal effect is increased by increasing the range of action and improving the herbicidal effect. There is an effect that can be. The adjusting tool has an advantage that the two operations can be performed with one rake.

  In addition, the adjustment tool has a structure that can adjust the rigidity of the rake so that the rigidity of the rake increases as the working width increases, so that the weeding work of the seedling in a state where the stock immediately after transplanting is weak can be shortened. This can be done with a rake having a low working width and low rigidity. Thereby, the lodging of seedlings can be more effectively prevented during weeding by rake, and the effect of preventing growth damage is improved.

  On the other hand, after transplanting, the weeding operation at a time when the seedlings of the seedlings became stronger and the roots of the weeds became stronger can be performed with a rake having a long action width and high rigidity. Thereby, the weeding effect can be further improved.

  The curved ridge-shaped elastic material is provided symmetrically to form the rake, and the adjustment tool is provided on both the left and right elastic materials, so that the working width and rigidity of the rake can be adjusted symmetrically. The herbicidal action can be applied substantially equally to the left and right of the strain, and there is an advantage that stable weeding work can be performed.

  1 and 2 are a plan view and a side view of a weeding machine in which a weeding work machine is connected to the rear of the traveling machine body, and FIG. 3 is a rear view of the weeding work machine. The traveling machine body 1 is a conventionally known riding rice transplanter. The traveling machine body 1 includes left and right front wheels 2 and a rear wheel 3. It can move across the shoots N1, N2, N3, N4, N5, N6, N7, and N8 planted in the field (paddy field).

  A bonnet 4 that covers the engine room is provided at the front of the traveling machine body 1. A driver's seat 6 is provided behind the bonnet 4. A seat 7 is provided in the driver seat 6. A front operation panel 8 is provided in front of the seat 7, and the front operation panel 8 is provided with a steering handle 9, a main transmission lever 11, and the like.

  A lift link mechanism 12 is provided at the rear of the traveling machine body 1. The elevating link mechanism 12 is driven up and down by an expansion and contraction operation of the hydraulic cylinder 13. A weeding machine 16 is detachably attached to the elevating link mechanism 12 via a hitch holder 14 provided at the end portion.

  A bracket 15 is attached to the hitch holder 14 so as to be able to roll freely. A rolling frame 17 is attached to the bracket 15. The rolling frame 17 is a square pipe in the width direction (left-right direction) of the traveling machine body 1.

  As shown in FIG. 4, a support member 18 that extends downward is attached to the bracket 15. A center float 19 is attached to the support member 18 so as to be movable up and down. The center float 19 is used as a sensor (sensor float) of a conventionally known hydraulic pressure sensing mechanism provided in the traveling machine body 1. The hydraulic pressure sensing mechanism can automatically adjust the height of the weeding machine 16 according to the flooding condition and soil quality of the rice field.

  A plurality of support rods 20 are attached to the rolling frame 17 so as to be vertically adjustable. Side floats 21 are attached to the support rods 20 adjacent to the support rods 20 positioned on the left and right outermost sides so as to be swingable up and down. The side floats 21 are located on the left and right sides of the center float 19. The left and right side frames 17 are positioned behind the front wheels 2 and the rear wheels 3 and perform leveling while erasing the wheel marks of the front and rear wheels 2 and 3.

  A bracket arm 24 is attached to the bracket 15 side toward the rear. A support rod 26 is attached to the bracket arm 24 so as to be vertically adjustable. The support rod 26 is provided with front and rear cars 23F and 23R, which are rotary weeding means, through a support bracket 22 as a set of cars (double-line cars).

  As shown in FIG. 5, the other support rod 20 on the rolling frame 17 side includes front and rear vehicles 23F and 23R, which are rotary weeding means, via a support bracket 22, as a pair of vehicles (two trains). It is provided as a Shikita car. All of the cars 23F and 23R freely rotate around the horizontal axis with respect to the traveling direction of the traveling machine body 1. All the rolling stocks 23F and 23R are rotated by ground resistance with the paddy surface, and weeding is performed by this rotation as in the conventional case. Note that the fields 23F and 23R can be driven to rotate by a drive source such as a motor.

  This weeding work machine 16 can perform weeding twice by a double train using the front and rear fields 23F and 23R. By adjusting the heights of the support rods 20 and 26, the heights of the cars 23F and 23R are adjusted at the same time for each double-lined car.

  The central double-type truck 27 is disposed immediately after the center float 19. The rice cart 27 is positioned between the shoots N4 and N5 in the center of the planted plant to perform weeding. The double trains 28 and 29 located on the left and right sides of the central double train 27 are respectively connected to the right side of the central double train 27 and the ridges N5 and N6 adjacent to the right side of the center double train 27. Weeding is carried out in the space between the shoots N4 and N3 adjacent to the left side of the double train 27.

  The double trains 31 and 32 located outside the left and right side floats 21 are adjacent to the space between the shoots N2 and N1 adjacent to the outside of the left side frame 21 and the outside of the right side frame 21. Weeding is performed between the shoots N7 and N8.

  The center double-type truck 27 is located behind the other double-type cars 28, 29, 31, 32, and avoids the center float 19 in the front-rear direction. The double-type cars 28, 29, 31 and 32 other than the central double-type car 27 are located on the side of the side float 21. In a state where the weeding work machine 16 is connected to the traveling machine body 1, the double-line cars 28, 29, 31, 32 other than the central double-line car 27 approach the traveling machine body 1.

  Support frames 33 are attached to the left and right sides of the rolling frame 17 toward the rear. Three support bars 34, 36, and 37 are attached to both the support frames 33 at a predetermined interval in the front-rear direction. A plurality of rakes 38, 39, 41, 42, which are weeding means, are attached to the attachment bars 34, 36, 37. Each rake 38, 39, 41, 42 can be adjusted in height with respect to the mounting bars 34, 36, 37.

  The rake 38 attached to the front attachment bar 34 is arranged corresponding to the planted shoots N2, N3, N6, N7. As shown in FIG. 6, the rake 38 has a configuration in which a plurality of curved elastic members (tines) TI and TO are arranged symmetrically. Each tine TI, TO is attached with its base end fixed to the bracket 40.

  The rake 38 includes both inner left and right inner tines TI facing each other and outer tines TO arranged outside the left and right inner tines TI. The inner tine TI and the outer tine TO are curved so that the central portion swells outward. The tip portions of the inner tine TI and the outer tine TO are bent inward. The rake 38 has a shape that sandwiches the shoots N2, N3, N6, and N7 as a whole.

  A hook-shaped guide rod 35 is provided along the inner tine TI from a position close to the base end portion of each inner tine TI of the bracket 40. Both guide rods 35 are made of an elastic member having a higher spring constant than the inner tine TI and having a high rigidity. Both guide rods 35 extend toward the inside of the substantially central portion of the adjacent inner tine TI. However, the tip portions of both guide rods 35 are bent outward on the inner side of the inner tine TI, and the tips protrude slightly outward from the inner tine TI in the vicinity of the substantially central portion of the inner tine TI.

  The left guide rod 35 and the inner tine TI are inserted together in one tube 45L. The right guide rod 35 and the inner tine TI are collectively inserted into another (another) tube 45R. Both tubes 45L and 45R have the same structure. The tubes 45L and 45R are slidable within the range of the length to the tip bending portion of the guide rod 35.

  Since the guide rod 35 is less likely to bend (has high rigidity) than the inner tine TI, it tends to bulge outwardly with a strong force. Therefore, the tubes 45L and 45R can be fixed at an arbitrary position without providing a stopper or the like. The tubes 45L and 45R can be slid against the friction force between the tubes 45L and 45R, the guide rod 35 and the inner tine TI due to the urging force of the guide rod 35 by the operator's hand.

  As shown in FIG. 6, when the tubes 45L and 45R are positioned in the vicinity of the guide rod 35 and the proximal end portion of the inner tine TI, the left and right inner tine TIs have substantially zero gap between their tips. And the rake 38 as a whole at the center of the left and right. As shown in FIG. 7, when the tubes 45L and 45R are positioned at the substantially distal end portion of the guide rod 35, the inner tine TI intersects the distal end portions in plan view and rear view.

  When the positions of the tubes 45L and 45R are adjusted between the vicinity of the proximal end portion of the guide rod 35 and the inner tine TI and the substantially distal end portion of the guide rod 35, the length (range) where the left and right inner tine TI intersect is determined. Is adjusted. As the tubes 45L and 45R are brought closer to the tip of the guide rod 35, the length at which the left and right inner tines TI intersect becomes longer.

  Since the inner tine TI is integrated with the guide rod 35 from the base end portion to the position of the tubes 45L and 45R, it is affected by the rigidity of the guide rod 35. For this reason, when the tubes 45L and 45R are positioned in the vicinity of the proximal end portion of the guide rod 35 and the inner tine TI, the inner tine TI hardly receives the elastic force of the guide rod 35, and therefore its rigidity is the inner tine. It is almost the same as the case of TI alone.

  On the other hand, when the tubes 45L and 45R are positioned at the substantially distal end portion of the guide rod 35, the inner tine TI receives the maximum elasticity of the guide rod 35. Since the individual rigidity of the guide rod 35 is larger than that of the inner tine TI, the rigidity of the inner tine TI is increased in the above state, and the inner tine TI is difficult to bend.

  When the positions of the tubes 45L and 45R are adjusted between the vicinity of the proximal end portion of the guide rod 35 and the inner tine TI and the substantially distal end portion of the guide rod 35, the rigidity of the inner tine TI (the inner tine TI is difficult to bend). Degree) is adjusted. The rigidity of the entire rake 38 changes due to the change in rigidity of the inner tine TI.

  The tips of both outer tines TO are located outside the both inner tines TI, and a predetermined gap is formed between the tips. As shown in FIG. 3, each rake 38 is inserted into the field at the tip of the inner tine TI and the outer tine TO. When the rake 38 (inner tine TI and outer tine TO) is inserted in the field and the weeder is run along the shoot, weeding is performed by the inner tine TI and the outer tine TO.

  The inner tine TI of each rake 38 passes directly behind each shoot N2, N3, N6, N7, and when it comes into contact with the seedling stock as the weeding machine advances, Close again after passing. As a result, weeds located between the strains are scraped and weeded between the strains. The outer tine TO passes through a position that is a predetermined distance away from the stock, scrapes and removes the weeds at the side of the stock (sides close to the stock). However, since the outer tine TO passes through the plantar relatively close to the stock, we perform weeding near the stock of each shoot N2, N3, N6, N7.

  Since the inner tine TI contacts the stock as described above, the longer the left and right intersection length is, the closer the portion that first comes in contact with the stock is closer to the base end side, and the length of contact with the stock is longer. Assuming that the contact width in the left-right direction with the stock of the inner tine TI is the action width A (see FIG. 7), the action width A increases as the left / right intersection length increases.

  On the other hand, the higher the rigidity of the inner tine TI, the greater the force required to open the inner tine TI. Therefore, the weeds are scraped off with a strong force, and the weeding action force is improved. However, as the rigidity of the inner tine TI increases, the inner tine TI comes into contact with the seedling stock with a stronger force.

  As described above, the action width A can be increased and the weeding action force can be increased as the tubes 45L and 45R are brought closer to the distal end of the guide rod 35, and the tubes 45L and 45R are arranged near the guide rod 35 and the proximal end portion of the inner tine TI. If it is located, the action width A and the herbicidal action force can be made extremely small (infinitely close to 0). The operating width A and the operating force of the rake 38 can be adjusted simultaneously by the tubes 45L and 45R.

  The rakes 39 and 41 attached to the attachment bar 36 at the intermediate position are arranged corresponding to the planted shoots N2, N3, N4, N5, N6 and N7. The rake 39 corresponding to the shoots N2, N3, N6, and N7 is disposed immediately behind the rake 38 attached to the mounting bar 34 on the front side.

  The rake 39 corresponding to the shoots N2, N3, N6, and N7 attached to the attachment bar 36 at the intermediate position has a spring constant smaller than that of the rake 38 attached to the attachment bar 34 on the front side. Become. The rake 39 includes left and right inner tines on the inner sides facing each other and outer tines arranged outside the left and right inner tines.

  The inner tine and the outer tine are curved so that the central portion swells outward, and the tip portion is bent inward to sandwich the shoots N2, N3, N6, and N7. Yes. A predetermined gap is formed between the tips of the left and right inner tines and between the tips of the left and right outer tines.

  The gap is set so that the tip of the rake 39 passes through the stock. However, the rake 39 (inner tine and outer tine) passes through a position further away from the stock market than the outer tine TO of the rake 38. As shown in FIG. 3, the rake 39 has a tip portion inserted into the field and performs weeding of the shoots N2, N3, N6, and N7.

  The rake 41 attached to the attachment bar 36 at the intermediate position and corresponding to the shoots N4 and N5 is the same as the rake 38 attached to the attachment bar 34 on the front side, so as to sandwich the shoots N4 and N5. It has become a shape. The tip of each rake 41 is inserted into the field, and the inner tine passes just behind each shoot N4, N5, and weeds between the shoots N4, N5.

  The rake 42 attached to the mounting bar 37 on the rear side is arranged corresponding to the planted shoots N4 and N5, and the rake 41 corresponding to the shoots N4 and N5 attached to the mounting bar 36 at the intermediate position is true. It is arranged after.

  The rake 42 attached to the attachment bar 37 on the rear side is the same as the rake 39 corresponding to the shoots N2, N3, N6, N7 attached to the attachment bar 36 at the intermediate position, and is shown in FIG. As described above, the tip is inserted into the field, and weeding of the shoots N4 and N5 is performed. A pair of left and right stands 43 that support the weeding machine 16 in a grounding posture are attached to the rear mounting bar 37 so as to be movable up and down.

  Each rake is arranged as described above, and for each shoot N2, N3, N4, N5, N6, N7, the front and rear rakes 38 and 39 or 41 and 42 form a pair of two rakes. Weed over time. However, the double rake 44 corresponding to the center shoots N4 and N5 is located behind the other double rakes 46.

  The rear of the left and right rear wheels 3, that is, the space between the shoots N2 and N3 and the space between the shoots N6 and N7, have a herbicidal effect obtained by the action of the mud on the surface by the lag of the rear wheel 3, and the rear wheels. No special weeding means is provided because a leveling effect due to the wheel mark erasing action by the side float 21 arranged behind 3 is expected.

  The present weeder is configured as described above, and by lowering the weeding work machine 16 so that the center float 19 and the side float 21 are in contact with the surface of the field, 28, 29, 31, 32 and double rakes 44, 46 perform the weeding work.

  At this time, each line is 1 by a corresponding double train 27, 28, 29, 31, 32, and each line is 1 by a double rake 44, 46 corresponding to each shoot N2, N3, N4, N5, N6, N7. The weeding is performed twice and weeding efficiency is high. In particular, among the two rakes 44 and 46, weeds are shared by the front rakes 38 and 41, and the rear rakes 39 and 42 are used for weeding, so that weeding efficiency is further improved. Yes.

  In addition, in order to maintain the stirring depth for weeding of the cars 23F and 23R at the time of dredging etc., an inclination sensor is provided, and the left and right inclination on the weeding work machine 16 side is automatically controlled, and the cars 23F and 23R are controlled. It can also be configured to ensure the weeding ability.

  When the traveling machine body 1 meanders left and right, the components of the weeding work machine 16 connected to the traveling machine body 1 are closer to the traveling machine body 1 in the front-rear position and closer to the left and right center lines of the traveling machine body 1. The smaller the displacement amount, the better.

  In the weeding work machine 16, the two consecutive cars 27, 28, 29, 31, and 32 are located in the vicinity of the traveling machine body 1 as described above. For this reason, the left and right run-out amount of the cars 23F and 23R when the traveling machine body meanders is suppressed to be small, and the seedlings 23F and 23R that are originally located between the strips are pushed down and planted when the traveling machine body 1 meanders left and right. The inconvenience of damaging the seedling is prevented.

  The rakes 38, 39, 41, and 42 are disposed at positions farther away from the traveling machine body 1 than the cars 23F and 23R, and the rakes 38, 39, 41, and 42 are made of an elastic material. The left and right wobbling of the airframe 1 is relatively large due to the left and right meandering, but even if the rakes 38, 39, 41 and 42 come into contact with the seedling side, the elasticity of the rakes 38, 39, 41 and 42 may Drawing or the like does not occur easily.

  In the present embodiment, the four double rakes 46 located on the side of the traveling machine body 1 are arranged closer to the traveling machine body 1 than the two double rakes 44 located behind the center float. ing.

  As a result, the left and right meandering of the traveling machine body 1 is less affected by the left and right meandering, in addition to the small amount of displacement of the central double rake 44 located near the left and right center lines of the traveling machine body 1. Four large double rakes 46 on the left and right sides are positioned in the vicinity of the traveling machine body 1 so that the amount of left / right deflection is suppressed.

  As described above, since the amount of lateral deflection of the rakes 38, 39, 41, 42 is suppressed as a whole, unnecessary contact between the tips of the rakes 38, 39, 41, 42 and the roots of the seedlings accompanying the left and right meandering of the traveling machine body 1 Is suppressed, and the rakes 38, 39, 41, 42 and the roots of the seedlings are particularly strongly in contact with each other, and the inconvenience of damaging the planted seedlings can be prevented.

  Note that the total length of the weeding machine 16 can be shortened by arranging the fields 23F, 23R and the rakes 38, 39, 41, 42 as described above, the turning radius during turning can be suppressed, and the weeding machine Is easy to handle.

  On the other hand, in the above-described embodiment, since the rear rakes 39 and 42 of each of the double rakes 44 and 46 have a smaller elastic force than the front rakes 38 and 41, the left and right sides of the traveling machine body 1 are relatively left and right. It is possible to prevent the seedling from being damaged by the rear rakes 39 and 42 where the runout is greatly increased.

  This weeder can also be used for pesticide-free cultivation in paddy fields. In general, when pesticide-free cultivation is performed in paddy fields, it is necessary to perform weeding for the first time about 10 days after transplanting the seedlings to the field, and then 3 to 4 times in total every about 10 days.

  The seedlings of seedlings immediately after transplantation are extremely weak and can be easily fallen by tine during the first and second weeding. For this reason, when using this weeder (weeding work machine), at the time of the first and second weeding, the rigidity of the inner tine TI of the rake 38, 41 is lowered by the tubes 45L, 45R (acting force is reduced), Further, by reducing the action width A, it is possible to prevent the seedlings from falling over when weeding by the rakes 38 and 41, thereby preventing the growth failure.

  On the other hand, when weeding for the third to fourth times, weeds have strong roots. Therefore, weeding may be incomplete if the elastic action width of tine on the seedling is small. For this reason, weeding of weeds is effective by increasing the rigidity of the inner tine TI of the rakes 38 and 41 by the tubes 45L and 45R and increasing the action width A by the tubes 45L and 45R. Can be performed automatically.

  In addition, at the 3rd to 4th weeding times, the seedling stock is also strong, so even if the inner tine TI has high rigidity and the action width A is large, the seedling can easily fall on the inner tine TI during weeding. There is nothing. The rakes 38 and 41 can easily perform the two operations (first and second weeding operations and third and fourth weeding operations) by adjusting the slides of the tubes 45L and 45R. The setting of the action force and action width A of the inner tine TI can be performed according to the condition of the seedling, and weeding work according to various seedlings and field conditions is possible.

  Since the tubes 45L and 45R are provided on the left and right inner tines TI, by adjusting the left and right tubes 45L and 45R to substantially the same position, the left and right inner tines TI are adjusted substantially symmetrically, so that weeding work is performed. It can be carried out efficiently in a balanced and symmetrical manner.

  However, depending on circumstances, the positions of the left and right tubes 45L and 45R may be different, and the weeding operation can be performed asymmetrically. Alternatively, a guide rod 35 and a tube 45L or 45R may be provided for only one of the left and right inner tine TI, and the working width and working force of the rakes 38 and 41 may be adjusted by the one inner tine TI.

  The structure of the rakes 38 and 41 using the tubes 45L and 45R and the guide rod 35 can be applied to other rakes 39 and 42.

  On the other hand, especially when it is desired to improve the herbicidal effect between strains, either or all of the two rakes 44 and 46 are moved back and forth as the rake 38 or 41 as shown in FIGS. It can also be set as the structure arrange | positioned continuously. Thereby, especially the weeding effect of the stockholder can be improved.

  As shown in FIGS. 8 and 9, a boss 47 that is rotatably fitted to the mounting bars 34 and 36 is integrally provided at the base end portion of the rake 38 or 41, and the boss 47 has an axial center. A push bolt 48 in an orthogonal direction may be attached, and the rake 38 or 41 may be attached to the attachment bars 34 and 37 via the boss 47 and the push bolt 48. FIG. 8 and FIG. 9 show an example in which the outermost double rake 46 is constituted by a rake 38 that is continuous in the front and rear direction.

  The push bolt 48 is screwed and attached to the boss 47 so as to penetrate the peripheral surface of the boss 47. The rake 38 or 41 is integrally attached to the attachment bars 34 and 36 by screwing the push bolt 48 and pressing the end face of the push bolt 48 against the peripheral surfaces of the attachment bars 34 and 37.

  At this time, since the boss 47 is rotatable with respect to the mounting bars 34 and 36, the mounting angle of the rake 38 or 41 is set by loosening the push bolt 48 and rotating the boss 47 with respect to the mounting bars 34 and 36. Can be adjusted up and down. By adjusting the rake 38 or 41 to an arbitrary angle and screwing the push bolt 48, the vertical angle (vertical position) of the rake 38 or 41 can be adjusted and positioned.

  The herbicidal effect can be further improved by adjusting the vertical position of the rake 38 or 41 according to the planting state or the field state of the strain. The other rakes 38, 39, 41, 42 of the above-described embodiment may be mounted so as to be rotatable up and down in the same manner as described above so that the vertical angle (vertical position) can be arbitrarily adjusted and positioned. Good.

It is a top view of a weeder. It is a side view of a weeder. It is a principal part rear view of a weeding machine. It is a side view of a center float part. It is a side view of a side float part. It is a rear view of the rake provided with the tube. It is a rear view of the rake provided with the tube of the state which made the inner tine cross | intersect. It is a principal part top view which shows the 2-unit rake of other embodiment. It is a principal part side view which shows the double rake of other embodiment.

1 traveling machine body 16 weeding machine 23F field vehicle 23R field vehicle 38 rake 39 rake 41 rake 42 rake 45L tube (adjustment tool)
45R tube (adjuster)
A Working width TI Inner tine (elastic material)

Claims (2)

A weeding machine (16) having rakes (38), (39), (41), (42) made of an elastic material is connected to the traveling machine body (1), and the inter-strain side of the planted seedling is weeded. Thus, in the weeding machine in which the rakes (38), (39), (41), (42) are arranged so that the tips are located in the vicinity between the stocks , the weeding machine (16 ) And adjusting tools (45L) and (45R) for adjusting the elastic action width of the rakes (38) and (41) on the seedlings . The adjusting tools (45L) and (45R) The structure of the rakes (38), (41) is adjustable so that the rigidity of the rakes (38), (41) increases with the expansion of (A), and the rakes (38), (39), (41), (42) are arranged in front and back, the front rake (38), (41) is mainly between stocks It is configured to perform grass, and is configured to mainly perform weeding at the rear side of the rake (39), (42) on the side where the rear rake (39) and (42) are close to the strain. , (42) the weeding machine in which the elastic force of the front rake (38), (41) is smaller . The curved ridge-shaped elastic material (TI) is provided symmetrically to form the rakes (38) and (41), and the adjustment tools (45L) and (45R) are provided on both the left and right elastic materials (TI). The weeder according to claim 1 provided.

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