JP5147086B2 - Paddy field weeding tools - Google Patents

Description

  The present invention relates to a weeding tool for paddy fields.

  Rice is irreplaceable for the health of Japanese people and is a staple food. Rice has a slightly lower protein content than bread, but rice protein contains nearly 90% of the amino acids necessary for the human body, and if you eat three times a day, you can meet the calorie requirements. Using rice as a staple food can be reasonably healthy from the viewpoint of human diet, and is attracting attention worldwide. In addition to eating as a staple food in Japan, it is also used as a raw material for seasonings and processed foods that should be said to represent Japan, such as sake, rice cake, miso, and soy sauce. .

  Rice production starts with putting fertilizer in the rice fields and laying the soil so that important seedlings can be brought up healthy, and then planting the grown seedlings into paddy fields to grow them into healthy upper rice. To go. In this process, weeding work is important for producing good quality rice. The generation of weeds consumes extra nutrients in the paddy field, and also hinders the sunshine on the rice, and good rice production is not allowed to hesitate. However, weeding work is the hardest hard work in the rice production process, and how to reduce the burden of such weeding work can be said to be a major issue for those engaged in rice production. In particular, in Japan, where there are few successors to farming and the average age of farm workers is in their mid-50s, the physical labor burden of older people and the health burden such as back pain are large.

  As a means for reducing such labor and the like, it is conceivable to use a paddy herbicide. However, in recent years, rice that does not use agricultural chemicals and chemical fertilizers has become popular and needs to meet market needs. In particular, organic rice is in demand, even if it is expensive, so many rice producers are shifting to pesticide-free and organic cultivation. There is also a weeding method by machine, but there is a problem that the cost burden becomes too large depending on the size of the paddy field.

  So far, various methods have been adopted by rice producers as pesticide-free and organically-cultivated weeding methods. For example, there is a method of releasing carp and Aigamo to paddy fields in order to make water turbid and inhibit photosynthesis and suppress the generation of weeds. This is because the carp makes good use of the action of actively stirring the surface of the soil in search of food in the soil and making the water turbid by the movement of the feet of the Aigamo. Aigamo can be said to be an effective weeding method by eating weed seeds and direct weeds, withering the weeds by floating their feet, or by stepping the weeds into the ground.

  However, weeds that have been rooted more than two weeks after rice planting cannot suppress their growth even if the water is turbid, and cannot be lifted up with the roots even if the soil is stirred. There is no choice but to suppress weed growth.

  In view of this problem, various techniques have been proposed. For example, in addition to the function of a conventional triangular basket, there is a farming tool that has a structure capable of weeding work and a structure capable of collecting work (see Patent Document 1). According to this technology, it is possible to use a light farming tool and uproot it in a standing posture, and to collect the weeds extracted with the same farming tool. . However, with such technology, we cannot weed the same range of stocks or streaks with a single round trip, requiring multiple round trips and taking time. In addition, since the area of both sides of the V-shaped cut is large, there is resistance to move back and forth in a state where the ridge is in the soil layer, and a large force is required. Furthermore, the technology is intended to remove weeds by pulling out weeds with a V-shaped cut, but most of the weeds that occur in paddy fields are primarily directed at root growth downward. It is considered that the technology in which the notch of the tip is in the vertical direction hardly catches.

  In addition, weeding machine that enables weeding of weeds weeded from paddy soil as it floats in the water and withering and spreading rice bran on paddy field to form a reduction layer by rice bran on the surface of paddy soil There is a paddy field weeding device equipped with a rice bran spreader for the tractor (see Patent Document 2). Such technology also has the effect that weeding work can be done with an easy posture while standing. However, such a technique involves removing the seedling from the soil surface with a rotating weeding claw, so that the seedling is easy to be damaged. I cannot solve it.

  Furthermore, a plurality of blades inclined on a pair of left and right centers, the upper part of which has a cone-like outer surface form an umbrella shape, and the soil between the blades and the blades is continuously moved by rotation by the vertical axis. Rotating blades for weeding between stocks, and multiple umbrella-shaped blades all open downward in a straight line, and there are no protrusions or dents even when in contact with soil, so that foreign substances such as grass and roots are not caught There is also an inter-plant weeding rotary blade for paddy field as described above (see Patent Document 3). This technique aims at the effect that it is possible to easily carry out heavy labor work to manually take grass, and that foreign matters such as grass and roots are less likely to get entangled and hard to damage young rice. However, if the rotating blade comes into contact with the seedling, it is unavoidable that the seedling is damaged, and it may cause the seedling itself to float. In addition, the rotary blades act on the soil layer only in the vicinity of the seedlings, and there is a problem that weeding is not possible in a wide range between strains or striations.

  In addition, weeds between strains are provided with a weight member at the tip and air is blown out from the ejection holes there to stir the soil surface of the rice field to leave the weeds from the soil, or the soil surface itself is submerged with the roots of the weeds in the water. There is a technology to lift up and remove weeds. According to such a technique, even when the rice plants are not sufficiently settled, unlike in the case of mechanical stirring such as rotation, weeding work that avoids the problem of floating rice can be performed. However, weeds that have been rooted more than two weeks after rice planting cannot be lifted up with the roots even if the surface water is agitated with air, and it is not possible to solve the above problem that the cost of purchasing the device is high. .

  If the above problems are arranged, it can be said that two problems have not been solved. One is that there are still no technical proposals for herbicidal tools that contribute to reducing labor in the case of human work. One is that the means to reduce labor by mechanization is expensive.

Utility Model Registration No. 3119843 JP 2004-180628 A Japanese Unexamined Patent Publication No. 2005-13170 JP 2008-22722

  In view of the above problems, the present invention provides a paddy weeding tool that can be easily weeded without using a large-scale agricultural machine even for weeds that have been rooted for more than two weeks after rice planting, and that contributes to reducing the labor of rice producers. The aim is to provide a technology that enables low cost production.

The present invention is a paddy field weeding tool comprising a handle portion, a soil layer floating plate portion, and a weed removal portion, wherein the handle portion and the soil layer floating plate portion are adjusted for attachment angle. The soil layer floating body plate part is coupled to be able to tilt and be fixed through a mechanism and a fixing mechanism. It is a plate-like body that has been processed and is submerged in surface water in relation to the weight and buoyancy of the handle portion and the weed removal portion, and floats on the soil layer. And two protruding shafts for horizontally extending the extraction wire in a stretched state on the bottom surface of the soil layer floating body plate portion, and the protrusion shaft has a depth of the extraction wire. in order to allow adjustment, it has a structure in which the depth adjusting mechanism that can adjust the amount of projection of the projecting Dejiku is provided of, Serial more than one set of weed pulling out portion, and a paddy field for weeding device, characterized in that it is Gu設 on the bottom of the plow layer floating plate.

In addition, in this document, the vertical direction of the soil layer floating body plate portion means the longitudinal direction between the seedlings or the streak direction of the seedlings in the paddy field, and the horizontal direction means the vertical direction relative thereto.

In the invention of the present application , the depth adjusting mechanism includes a flange provided on an upper surface portion of the soil layer floating body plate portion and a substantially cap-shaped fastening collar, and the flange inserts the projecting shaft in a slidable manner. A small diameter shaft portion is formed in a tapered shape, the peripheral wall has a plurality of slits in the axial direction, a male screw is formed on the outer peripheral surface, and the fastening collar is A taper bearing portion corresponding to a female screw combined with the male screw on the inner peripheral wall and a taper shaft portion formed at an axial tip of the flange small-diameter shaft portion is formed. The weeding tool for paddy fields according to claim 1 , wherein the small-diameter shaft portion has a structure in which the shaft portion of the protruding shaft is fastened by screwing .

In the present invention, the weed removal part is provided with a removal wire removal mechanism that allows the removal wire to be removed from the protruding shaft with a single touch, and the removal wire removal mechanism includes a bent part and a removal part. It comprises a linear holding part, and the bent part has a split structure that is pivotally supported so that the protruding shaft can be bent at the upper part of the wire attachment position at the bottom of the protruding shaft, and the linear holding part is The paddy weeding tool according to claim 1 or 2 , wherein the protruding shaft comprises a fixing collar for maintaining a linear state with respect to the axial direction .

Further, the present invention comprises a configuration in which a width change mechanism is provided in the soil formation layer floating plate portion, and the width change mechanism is divided into one or more in the longitudinal direction in the soil formation layer floating plate portion. 4. The width of the soil formation layer floating plate part can be changed by sliding each soil layer floating body plate portion by a sliding shaft in a lateral direction. It can also be set as the weeding tool for paddy fields described in any of the above .

  According to the paddy field weeding tool of the present invention, without lifting the weeding tool or piercing into the soil, simply moving the soil layer floating body plate floating on the upper surface of the soil layer back and forth, Weeds can be withered by folding rooted weeds in a U-shape and embedding them in the soil layer or floating them in the paddy field. Also, in this case, the removal wire has a very small surface area, and the resistance to move through the water and soil layer is also very small. It is not necessary, and exhibits an excellent effect that contributes to labor reduction, which is the problem.

  Further, according to the paddy weeding tool of the present invention, the soil layer floating body plate sinks in the surface water and floats on the soil layer due to the weight and specific gravity of the handle portion and the weed removal portion combined. Because it is in the shape, even if there is a undulation in the soil layer, it floats to keep the surface of the soil layer, leveling the swell, and being able to flatten the surface of the soil layer Show the effect.

  In addition, according to the paddy field weeding tool of the present invention, because the extraction wire is horizontally laid in the soil layer, the annual weed nobies whose roots extend in the vertical direction, kogi, azena, kakashigusa, An excellent effect that it is suitable for weeding most typical weeds occurring in paddy fields, such as Japanese sandworms, perennial weeds such as dog firefly, Urikawa, Omodaka, Krogwai, etc.

  In addition, according to the paddy field weeding tool of the present invention according to claim 2 or claim 3, since the depth of the extraction wire can be changed, it is possible to cope with the growth state of the sprouted weeds. An excellent effect can be achieved. For example, in the case of Tatsugamatsuri, Kakashigusa, Konagi, Inu firefly, and Inu firefly, which emerge from a shallow layer within 2 cm below the surface of the flooded water, considering the length of the root, the removal wire depth is 2 cm from the top of the soil layer. However, according to the present invention, it is possible to finely adjust these depths according to the state of paddy fields and the growth state of weeds. In addition, the combination of arrangements in which the depths of the plurality of extraction wires are slightly different from each other (for example, combinations of 2.0 cm, 2.5 cm, and 3.0 cm, etc.) can be used to cope with a wide variety of weeding. An effect can also be produced.

  In addition, according to the paddy field weeding tool of the present invention according to claim 4 or claim 5, since the removal wire can be removed from the protruding shaft with one touch, it is easy even when weeds are entangled with the removal wire. It is possible to achieve an excellent effect that it can be removed.

  Moreover, according to the weeding tool for paddy fields of this invention which concerns on Claim 6, even if the dimension between strains changes with a rice transplanter or a rice producer, it is excellent that the width of a soil layer floating body board part can be changed according to this. The effects can be achieved.

  Moreover, according to the weeding tool for paddy fields according to the present invention, since it has a simple structure, it can be manufactured at a low cost and exhibits an excellent effect that it is economical as compared with an expensive agricultural machine.

  In addition, in other weeding tools and weeding machines that mechanically rotate the weeding part, there is a tendency to dig up deep seeds, but according to the paddy field weeding tool according to the present invention, the removal wire Since it works only on the soil formation layer where it passes, it does not dig up the seeds of the deep layer.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It is a bottom view of the soil layer floating body board part which concerns on this invention. It is a description perspective view which shows the Example of the angle adjustment mechanism and fixing mechanism which concern on this invention. It is explanatory drawing which shows the arrangement structure of the weed extraction part which concerns on this invention. It is explanatory drawing which shows the Example of the depth adjustment mechanism which concerns on this invention. It is an explanatory top view which shows the removal wire removal mechanism which concerns on this invention. It is an explanatory plan view showing a width changing mechanism according to the present invention. It is a usage method and state explanatory drawing of the weeding tool for paddy fields concerning the present invention. It is use condition explanatory drawing of the weeding tool for paddy fields concerning this invention. It is a use state explanatory drawing substitute photograph of the weeding tool for paddy fields concerning the present invention. It is a use state explanatory drawing substitute photograph of the weeding tool for paddy fields concerning the present invention. It is a use state explanatory drawing substitute photograph of the weeding tool for paddy fields concerning the present invention. It is a use state explanatory drawing substitute photograph of the weeding tool for paddy fields concerning the present invention.

  The paddy field weeding tool 10 according to the present invention has a plate-like soil layer floating body plate portion 30 that sinks in paddy water and floats on the bottom surface 30 of the weed removal portion 40 in a stretched state. The biggest feature is that it is installed horizontally. Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is an explanatory perspective view showing the overall configuration of a paddy field weeding tool 10 according to the present invention. The paddy field weeding tool 10 includes a handle portion 20, a soil layer floating body plate portion 30, and a weed removal portion 40. FIG. 2 is a bottom view of the soil layer floating body plate portion 30 according to the present invention, and shows a case where six sets of weed removal portions 40 are provided. FIG. 2 (a) shows an inter-row use, FIG. 2 (b) shows an inter-use use, and FIG. Show.

  The handle part 20 is a substantially bar-shaped body for operating the paddy field weeding tool 10 according to the present invention. The length and the cross-sectional shape are not particularly limited, but the average height of a Japanese male adult is about 170 cm. When the adjustment angle is assumed to be 35 to 40 degrees, a length of about 1 m is required, so the length may be about 1.2 m, but if possible, it has a length adjustment function. A structure is desirable. As such a length adjusting mechanism, a general length adjusting mechanism is conceivable in which different diameter pipes used for clothes racks and climbing poles are combined and the taper portion is tightened with a screw. More specifically, it is the same as the structure of FIG. Moreover, it is thought that it is easy to grasp that cross-sectional shape is circular. The material is not particularly limited, but it is desirable to use a lightweight material having the necessary rigidity. For example, a wooden round bar, a hollow aluminum pipe or a resin pipe. In addition, it is desirable that the grip portion is provided with a groove for preventing slipping or provided with a grip made of a material that does not slip easily.

  The soil layer floating body plate part 30 is a plate that sinks in paddy water that has been chamfered and rounded at the four corners of a substantially rectangular flat plate shape having the longitudinal direction between the strains or the streak direction of the seedling N in the paddy field and floats on the soil layer It is a state. Since the general interval between Hokkaido regions (33 cm) is 30 cm, the horizontal width H of the soil layer floating body plate portion 30 is about 18 to 26 cm, and the length L in the vertical direction is the number of weed removal portions. Lengthens accordingly. In addition, even when the number of weed removal parts 40 is small, it is needless to say that it is necessary to secure a volume for obtaining buoyancy for floating the weeding tool 10 for paddy fields on the upper surface of the soil layer. The reason why large chamfering and rounding are applied to the four corners is to prevent the seedling N from being damaged, and to reduce the resistance by reducing water resistance.

  Also, between stocks is generally narrower than the streak, but the size between stocks may vary depending on the rice transplanter or rice producer, so prepare multiple sizes with narrow widths for stocks, or As in the paddy field weeding tool according to the sixth aspect, the width H is made variable by providing a width changing mechanism in the soil layer floating body plate portion 30.

  In addition, as shown in FIG.2 (c), it is desirable that the edge part of the soil formation layer floating board part 30 is chamfered by the inverted trapezoid shape. This is because such a shape can prevent penetration into the soil.

  It is necessary that the volume of the soil layer floating body plate portion 30 sinks in the paddy water and floats on the soil layer due to the weight and buoyancy of the handle portion 20 and the weed removal portion 40 combined. Although the specific gravity of water is 1 (4 ° C) and the specific gravity of the soil layer varies depending on the water content, the specific gravity of the soil particles is often about 2.6. The ratio of the whole paddy weeding tool according to the invention to the weight per unit volume is designed to be larger than 1.0 and within a range of about 2.0. In this case, it is conceivable to use iron or stainless steel for the metal parts such as the protruding shaft 80 and the extraction wire 70. However, since the specific gravity of both iron and stainless steel is about 7.8, calculation based on changes in the material There is little impact on the above. However, when the soil layer floating board 30 is made of wood, care must be taken in selecting the material. Conifers such as cedar (specific gravity: 0.35), persimmon (specific gravity: 0.40), red pine (specific gravity: 0.48), paulownia (specific gravity: 0.27) tend to float in water because the specific gravity is less than 0.5. It may be necessary to increase the volume of the metal member. On the other hand, the broad-leaved trees such as beech (specific gravity: 0.62), persimmon (specific gravity: 0.64), red oak (specific gravity: 0.84) are 0.6 to 0.84, and the specific gravity is larger than conifers. Some of them are close to the specific gravity of water, such as akagashi. Therefore, the volume is determined so as to be the weight per unit volume of the set range based on the relationship between the volume of the metal member and the volume of the soil-carrying layer floating plate 30. Specifically, it can be considered that the volume is adjusted by the thickness of the soil layer floating body plate 30 or that a ballast is used.

  FIG. 3 is an explanatory perspective view showing an embodiment of the mounting angle adjusting mechanism 50 and the fixing mechanism 60 according to the present invention. The handle portion 20 and the soil layer floating plate portion 30 are coupled to each other via an attachment angle adjusting mechanism 50 and a fixing mechanism 60 so as to be tiltable and fixable. For example, as shown in FIG. 3, the attachment angle adjusting mechanism 50 has a convex shape at the end of the handle 20, and a concave support that sandwiches the end is provided at the approximate center of the top surface of the soil formation layer floating plate 30. It can be considered to form and pivotally support it. In addition, the fixing mechanism 60 may have a structure in which a handle 61 is rotated to fasten a shaft used for the shaft support with a screw. It can be fixed at a desired angle at the time of use, and may be used without being fixed depending on the swell or the hardness of the soil layer, and easily following the soil surface in a free state.

  The weed removal unit 40 includes an extraction wire 70 and two projecting shafts 80 for horizontally extending the extraction wire 70 on the bottom surface of the soil layer floating plate 30 in a stretched state. The one or more sets of weed removal portions 40 are provided on the bottom surface of the soil layer floating body plate portion 30.

  The extraction wire 70 is flexible and is a wire having a thickness of about 0.5 mm to 2 mm that can withstand the tensile stress applied when the weed Z is extracted. As a material, it is used for a metal wire or a tennis racket. For example, a nylon wire or a polyester wire, or a core wire made of Kevlar (registered trademark), which is an aramid fiber excellent in tensile strength and bending fatigue strength, can be considered. If it is a metal, for example, a wire that is hard to be corroded and hardly stretched like a stranded stainless steel wire is preferable. If it is a single wire, it is desirable to use a carbon steel metal wire such as a piano wire. On the other hand, a single wire made of steel such as a so-called wire is not preferred because it is easily plastically deformed and easily corroded.

  The projecting shafts 80 are two projecting shafts for horizontally extending the extraction wire 70 on the bottom surface of the soil formation layer floating plate 30 in a stretched state. The projecting shaft 80 has a substantially rod shape, and a structure or shape that allows the end of the soil layer floating plate 30 to be fixed by screwing or fitting in order to provide the soil layer floating plate 30 Alternatively, a through hole is provided in the soil layer floating body plate portion 30 and the shaft portion is fixed as a shaft diameter and a shape in which the shaft portion can slide within the through hole. On the other hand, a locking portion for locking the removal wire 70 is provided at the end of the removal wire 70 attached side. As the structure of the locking portion, for example, a structure in which the removal wire 70 is sandwiched by a clamp having a U-shaped groove and the clamp is tightened with a screw, or a penetration for passing the removal wire 70 through the tip portion is used. A structure in which a hole is provided, the extraction wire 70 is passed through the through-hole, and then fixed with a so-called set screw such as a hexagon socket set screw is conceivable.

  FIG. 4 is an explanatory view showing the arrangement configuration of the weed removal section 40 according to the present invention, and FIG. 4 (a) shows the depth of the extraction wire 70 in the weed removal section 40 depending on the soil layer floating body plate. FIG. 4B shows a state in which the depths of the plurality of extraction wires 70 in the weed extraction unit 40 are arranged in soil formation layers having different depths. Is shown. The second embodiment according to the present invention has the structure shown in FIG. 4 (b). For example, in the case where the depth from the surface water to the ground surface of the soil formation layer is 2 cm, it is removed. It arrange | positions so that the position of the wire 70 may become 2.5cm * 3.0cm * 3.5cm from the bottom face of the soil-carrying layer floating body board part 30. FIG. However, it is necessary that the position of the removal wire 70 be within a range that does not reach the floor layer.

  FIG. 5 is an explanatory perspective view showing an embodiment having a depth adjusting mechanism 90 provided in the third embodiment. In the third embodiment, the soil formation layer floating plate portion 30 is provided with a through hole, the shaft portion of the projecting shaft 80 is inserted into the through hole, and fixed at an arbitrary position. The position of the removal wire 70 can be adjusted from the bottom surface of 30. As such a length adjusting mechanism, as shown in FIG. 5A, for example, a structure in which a plurality of through holes 96 are provided in the shaft portion of the projecting shaft 80 and the fixing pin 93 is inserted at an arbitrary position, or FIG. As shown in b), a threaded portion 95 is formed on the shaft portion of the projecting shaft 80, the length is adjusted by rotating the projecting shaft 80, and the structure is fixed with a lock nut 91. Furthermore, as shown in FIG. 5 (b), a screw portion is formed on the shaft portion of the projecting shaft 80, and a flange 92 is provided on the upper surface portion or the bottom surface of the soil layer floating body plate portion 30. A taper portion having a plurality of slits at the tip end in the axial direction of the portion, a male screw is formed on the outer peripheral surface of the small diameter portion, and a fastening collar 94 is provided with a female screw combined with the male screw. A structure that tightens the shaft is also conceivable.

  FIG. 6 is an explanatory plan view showing the removal wire removal mechanism 110 that can remove the removal wire provided in the fourth embodiment with one touch. The extraction / removal wire removal mechanism includes a protruding shaft 80 formed of a bent portion and a linear holding portion.

  The bent portion has a bent shaft 111 that pivotally supports the distal end portion of the divided protruding shaft so that it can be bent in the lateral direction slightly above the attachment position of the removal wire 70 at the bottom of the protruding shaft.

  The linear holding portion is composed of a fixture 112 for holding the protruding shaft tip portion in a linear state with respect to the axial direction, and has a collar shape having a through hole having an inner diameter into which the protruding shaft 80 can be inserted in a sliding state. Yes, the fixture 112 is slid with the bent portion in a straight state, and the upper and lower portions of the bent portion of the protruding shaft 80 are covered to hold the divided protruding shaft 80 in a straight state. Further, the linear holding portion is provided with a positioning mechanism for preventing the fixture 112 from moving in the holding position. As a simple structure, the positioning mechanism has a structure in which a through hole communicating with the shaft portion of the projecting shaft 80 and the fixture 112 is provided and the fixing pin 93 is inserted, similarly to the structure shown in FIG. Although it is conceivable, it is desirable to provide two hemispherical grooves and a long groove connecting the two grooves on the inner wall of the fixture 112, and to accommodate a steel ball at a predetermined position of the projecting shaft 80. The structure etc. which hold | maintain a positional relationship by pressing on the inner wall of this are desirable.

    FIG. 7 is an explanatory plan view showing a width changing mechanism 100 provided in the fifth embodiment. The width adjusting mechanism 100 divides the soil layer floating body plate portion 30 into one or more in the longitudinal direction, and each of the divided soil layer floating body plate portions slides and fixes in the lateral direction by the sliding shaft 101. Thus, the width of the soil formation layer floating plate 30 can be changed. Moreover, the mechanism concerned also exhibits the tension adjustment function of the wire 70 for extraction / removal simultaneously. In addition, the length of the wire 70 for extraction / removal prepares the wire in which the length differs in steps, or the wire for removal of the protruding shaft 80 as the wire for removal 70 having a length corresponding to the maximum width. It is possible to cope with the 70 holding part by fastening and fixing.

  Below, the usage method and state of the weeding tool 10 for paddy fields concerning this invention are demonstrated. FIG. 8 is a diagram illustrating how to use the paddy weeding tool 10 according to the present invention and how it is used. FIG. 8A shows a state before weeding by extraction. The paddy weeding tool 10 floats on the upper surface of the soil layer due to the buoyancy of the soil layer floating body plate portion 30, and the removal wire 70 is submerged in the soil layer. In the drawing, weed Z is in a state where it has already sprouted on the ground surface of the soil layer. The weeding operator only needs to move the paddy weeding tool 10 floating on the upper surface of the soil layer back and forth. As shown in FIG. 8 (b), the weed Z is caught by the pulling wire 70 during advance, and the weed Z is bent into a dogleg shape. And as shown in FIG.8 (c), by retreating, the weed Z is embedded in the soil and cannot synthesize | combine, or it will die or it will float on the water surface and will not take root.

  Further, FIG. 8 (d) shows the effect of following the swell and leveling the soil layer even when the soil layer has a swell.

  FIG. 9 is an explanatory diagram when the usage state of the paddy weeding tool 10 according to the present invention is seen from the front. As shown in FIG. 9, the paddy weeding tool 10 according to the present invention can effectively weed the weeds Z1 that are generated in a wide range within the streak or between the strains. Moreover, the weeding tool 10 for paddy fields according to the configuration of claim 2 or 3 corresponds to the one that germinates in a deep place under the ground surface such as weed Z2.

  FIG. 10 to FIG. 13 are substitute photographs for explaining the use state of the paddy field weeding tool according to the present invention. The actual action and effect are shown in a photograph for visual clarity. FIG. 10 shows a working state, and the soil formation layer floating plate 30 does not float on the surface water, but sinks to the surface of the soil formation layer. The worker simply moves the paddy weeding tool 10 back and forth while walking in the paddy field in a standing posture. Little force is required on the arm, and there is no need to bend the waist. Weeding work, which has been a heavy labor until now, can be done very easily. FIG. 11 shows the state of the paddy field before the work, and it is not clouded yet. As shown in FIG. 11, it can be visually observed that a plurality of weeds Z start to be generated on the surface of the soil layer around the seedling N after several days from the planting or about 10 days after the first weeding operation. become. If this state is left unattended, it will adversely affect the growth of seedlings, so weeding is necessary. FIG.12 and FIG.13 has shown the state of the paddy field after finishing weeding work using the weeding tool 10 for paddy fields based on this invention. As shown in FIGS. 12 and 13, the extracted weeds Z float on the water surface or are buried in the soil layer and die.

DESCRIPTION OF SYMBOLS 10 Weeding tool for paddy fields 20 Handle part 30 Soil layer floating body board part 40 Weed removal part 50 Attachment angle adjustment mechanism 60 Fixing mechanism 70 Removal wire 80 Projection shaft 90 Depth adjustment mechanism 91 Fastening tool 92 Flange 93 Fixation Pin 94 Tightening collar 95 Screw part 96 Through hole 100 Width adjusting mechanism 101 Sliding shaft 110 Pull-out wire removing mechanism 111 Bending shaft 112 Fixing tool H Horizontal width L Length Z Weed N Seedling

Claims (4)

The handle and
Soil layer floating board,
Weed removal section,
A paddy field weeding tool comprising:
The handle portion and the soil layer floating body plate portion are coupled to be tiltable and fixable via an attachment angle adjusting mechanism and a fixing mechanism,
The soil layer floating body plate part is chamfered and rounded at four corners of a substantially rectangular flat plate shape having a longitudinal direction between the stocks or the streak direction of seedlings in the paddy field, and the handle part and the weed removal part are combined. Is a plate-like body that sinks in the surface water in relation to the weight and buoyancy and floats on the soil layer,
The weed extraction part is composed of an extraction wire and two projecting shafts for horizontally extending the extraction wire in a stretched state on the bottom surface of the soil layer floating plate part , In order to make it possible to adjust the depth of the wire for removal on the protruding shaft, the protruding shaft has a structure that is provided with a depth adjusting mechanism that can adjust the protruding amount of the protruding shaft,
The weeding tool for paddy field, wherein the one or more sets of weed removal parts are provided on the bottom surface of the soil layer floating plate part.
The depth adjusting mechanism is
Consists of a flange and a cap-shaped tightening collar provided on the top surface of the soil layer floating board,
The flange has a through hole for slidably inserting the protruding shaft, the axial tip of the small diameter shaft portion is formed in a tapered shape, the peripheral wall has a plurality of slits in the axial direction, and the outer peripheral surface Has a male thread,
The tightening collar has a female screw combined with the male screw on an inner peripheral wall, and a taper bearing portion corresponding to a taper shaft portion formed at an axial end of the flange small-diameter shaft portion. The paddy field weeding tool according to claim 1 , wherein the shaft portion of the protruding shaft is tightened by the small-diameter shaft portion by screwing by rotation of a collar.
In the weed removal part, a removal wire removal mechanism that can remove the removal wire from the protruding shaft with a single touch is provided,
The removal wire removing mechanism is
It consists of a bent part and a linear holding part,
The bent portion has a split structure that is pivotally supported so that the protruding shaft can be bent at the upper part of the protruding wire mounting position at the bottom of the protruding shaft.
The paddy field weeding tool according to claim 1 or 2 , wherein the linear holding portion includes a fixing collar for holding the protruding shaft in a linear state with respect to an axial direction.
A width changing mechanism is provided in the soil layer floating body plate,
The width changing mechanism is
In the soil layer floating body plate portion, consisting of one or more divided in the longitudinal direction,
2. The width of the soil formation layer floating plate portion can be changed by sliding each of the divided soil layer floating plate portions in a lateral direction by a sliding shaft. Item 4. A paddy field weeding tool according to any one of Items 3 to 4.