JP4837948B2 - Crushing work tool of plowing and leveling device and plowing and leveling device equipped with the same - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a soil crushing tool for a tilling and leveling device such as a cultivator and a subsoiler, and a tilling and leveling device equipped with the same. The present invention relates to a soil crushing work tool for a plowing and leveling apparatus suitable for carrying out, and a plowing and leveling apparatus equipped with the same.

  Conventionally, in farm fields such as fields, it has been known that a stratum several tens of centimeters below the ground surface becomes hard due to traveling of a tractor or the like. In addition, depending on the soil quality, there are some fields that become harder when the moisture content is reduced. When a hard stratum is formed in this way, it prevents the crop from rooting deep into the ground, reducing the air permeability and water permeability of the soil, so use a cultivator such as a cultivator. Work to dig up the soil and loosen the hardened topsoil is being carried out.

  As a working machine for tilling as described above, for example, a cultivator described in Japanese Utility Model Publication No. 7-3846 is known (Patent Document 1). This cultivator has a plurality of claws inserted into the ground, and digs up the soil by pulling them with a tractor.

No. 7-3846

  However, in the conventional tilling work machine including the invention described in Japanese Utility Model Publication No. 7-3846, the earth lump scraped up by the nail is rolled up along the nail and scattered around the adjacent hail and surroundings. There is a problem of end up. This soil block is a hindrance when harvesting crops, and in particular, as the traveling speed of the tractor increases, it scatters farther, making it difficult to travel at high speed. In addition, when soil in the ground that does not contain the herbicide component is scattered on the soil surface after the herbicide is sprayed, there is a problem that the herbicidal effect is reduced and weeds are likely to grow. Furthermore, after digging up the soil with the nail, a plowing groove is formed, and there is a problem that the field becomes uneven.

  The present invention has been made in order to solve such problems, and prevents soil clumps from being scraped up and scattered around the plowing and leveling claws. Crushing the clump of soil using the force that the soil is raised by digging up, returning the crushed soil into the plowing groove, and installing the soil breaking work tool of the plowing and leveling device that can level the field gently and attach this The purpose is to provide a tilling and leveling device.

  A feature of the soil breaker working tool of the plowing and leveling apparatus according to the present invention is a soil breaking work tool that is attached to a plowing and leveling apparatus used for soil plowing, deep plowing, cultivating work, etc. The plate is provided with a group of crushed rods composed of a plurality of crushed rods supported in the shape of a plane substantially fan-shaped bone or a plane substantially parallel to the plate, and each crushed rod has a rear end portion in a horizontal direction as viewed from the plane. And has a ground abutting portion that can be bent upwardly when viewed from the side, or can be elastically deformed when abutting against the ground and bend upward along the ground. The ground rod group is spaced apart from the tip of the tilling / leveling claw for digging up the soil provided in the tilling / leveling device, and from the front of the tilling / leveling nail. At the point placed near both sides .

  Moreover, in this invention, it is preferable that the ground contact part of the said crushed rod group is extended from the both sides | surfaces of the said tilling and leveling nail | claw to the back further.

  Furthermore, in this invention, it is preferable that each said earth-crushing rod is formed in the planar substantially wave shape from the ground contact part to the front side part further.

  In addition, the characteristics of the soil crushing work tool of the plowing and leveling apparatus according to the present invention is a soil crushing work tool that is attached to a plowing and leveling apparatus used for soil plowing, deep plowing, cultivating work, etc. in the field. , Provided with a saddle roller rotatably supported in front of the tilling and leveling claw for digging up the soil provided in the tilling and leveling device, and the saddle roller is a circle that supports the rotating shaft And a plurality of crushed rods supported in a substantially cylindrical bone shape on the circular plate, and the saddle-shaped roller has the plow so that the lower crushed rod can contact the ground surface. It is arranged at a predetermined distance upward from the tip of the raising and leveling nail, and is arranged so as to crush the soil mass dug up by the plowing and leveling nail with the plowing and leveling nail is there.

The plowing and leveling device according to the present invention is characterized by a plowing and leveling device used for soil plowing, deep plowing, cultivating work, and the like in a field. It lies in the fact that attach the of Harrow implement.

  According to the present invention, it is possible to prevent the clumps from being scraped up and scattered around the plowing and leveling claws, and to remove the clumps by using the force that the soil is raised by being dug up by the plowing and leveling claws. The ground can be gently leveled by grinding and returning the ground soil to the plowing groove.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a tilling work tool of a plowing and leveling apparatus and a plowing and leveling apparatus to which the plowing and leveling apparatus is attached will be described with reference to the drawings. FIG. 1 is a perspective view showing a tilling / leveling device 1 </ b> A provided with the earth crushing work tool of the first embodiment, and FIG. 2 is a side view thereof.

  The tilling / leveling device 1A of the first embodiment functions as a so-called medium tillage cultivator, and a plurality of tilling / leveling devices 1A are set as a set to a tractor (not shown) towed or directly mounted. Connected with The tilling / leveling device 1A of the first embodiment mainly includes a plurality of tilling / leveling claws 2A composed of middle tilling claws or the like for digging up soil, and a soil crushing work tool 3A for crushing soil blocks, A support frame 4A for supporting the plowing and leveling claws 2A and the ground breaking tool 3A, an auxiliary wheel 5 provided on the support frame 4A, and a connection frame 6 having a top link (not shown) for connection to a tractor and the like The connecting frame 6 has a link mechanism 7 for attaching the support frame 4A.

  Next, each component will be described in more detail. The plowing / leveling claw 2A plays a role of being dug into the ground and digging up the soil to loosen it, and is formed in a sharp shape like a claw, as shown in FIGS. Further, in the first embodiment, the three tilling and leveling claws 2A are arranged with their positions shifted in the front-rear direction and the left-right direction with respect to the traveling direction so that the gaps can be dug all over. In addition, since the soil near the center of the furrow is particularly hard due to the tractor traveling, the plowing / leveling claw 2A arranged at the center in the left-right direction is attached longer than the other plowing / leveling claw 2A. Plow deeply.

  The crushing work tool 3A is auxiliary arranged above the tip side of the plowing / leveling claw 2A, and plays a role of pressing and crushing the lump dug up by the plowing / leveling claw 2A from above and preventing scattering. Fulfill. As shown in FIGS. 1 to 4, the crushed work tool 3 </ b> A includes a spiral spring 31 that absorbs an impact from the ground surface, a support plate 32 attached to the rear end portion of the spiral spring 31, and a support plate 32. And a group of crushed soil rods 34 composed of a number of crushed soil rods 33.

  Each crushed rod 33 is composed of an elastic member that absorbs the impact received by the level difference on the ground surface and has an elastic force that can follow the vertical movement of the tilling and leveling claws 2A. Each crushed rod 33 is fixed to the support plate 32 so as to form a substantially fan-like shape when viewed from above. Further, each crushed rod 33 is bent in a substantially wave shape in the horizontal direction when viewed from the plane, and has a large area in contact with the ground and an area for crushing the soil mass. Further, the rear end portion of each crushed rod 33 is curved upward as viewed from the side surface, and a ground contact portion 33a is formed. The ground contact portion 33a prevents the rear end portion of the crushed rod 33 from diving into the ground, and exerts an action capable of pulverizing the soil mass scraped up on the ground surface. The crushed rod group 34 composed of such crushed rods 33 is arranged at a predetermined interval upward from the sharp portion at the tip of the tilling / leveling claw 2A. This height interval is set to such an extent that the crushed rod 33 can be arranged on the ground surface when the tilling / leveling claw 2A is inserted into the ground to a desired depth. Moreover, the ground contact part 33a of each crushed rod 33 surrounds both side surface vicinity from the front of the plowing and leveling claw 2A, and is further extended to the back.

  In the first embodiment, the shape of the crushed rod 33 is formed in a substantially wave shape even from the ground contact portion 33a to the front for the purpose of ensuring a sufficiently large area in contact with the mass and enhancing the crushed effect. However, the present invention is not limited to this, and as shown in FIG. 5, if at least the ground contact portion 33 a is a plane wave shape, a ground breaking work tool 3 </ b> B in which the front portion is formed in a straight line is used. Also good. Moreover, in this 1st Embodiment, although each crushed rod 33 is supported by the support plate 32 so that the crushed rod group 34 may become the shape of a substantially plane fan, even if it is made to support in the shape of a plane substantially parallel to a plane. Good. Moreover, in this 1st Embodiment, although the ground contact part 33a is extended to back in order to combine the weeding effect, from the point of the crushed effect, it arrange | positions over the both sides | surfaces of the plowing / leveling claw 2A at least. It only has to be done.

  Furthermore, in the first embodiment, the ground contact portion 33a is curved in advance upward as viewed from the side, but is not limited to this, and the ground contact portion 33a is elastically deformed when contacting the ground. If it is comprised by the elastic member of the grade which can curve to the upper side along, you may use the substantially straight crushing rod 33. FIG.

  The support plate 32 supports each crushed rod 33 and its end is bent upward to form a comb-like slit portion 32 a having the width and number of each crushed rod 33. Then, each crushed rod 33 is inserted through the comb-shaped slit portion 32a, and is sandwiched between the support plate 32 and the fixing plate 32b and fixed with the bolts B.

  The spiral spring 31 has a lower end fixed to the support plate 32 with bolts B, and a spiral spring portion on the upper end side is bolted to the support frame 4A with an appropriate tightening force.

  Next, the support frame 4A plays a role of supporting the plowing / soil leveling claw 2A and the soil crushing work implement 3A, and can appropriately adjust the support positions in the front-rear direction and the left-right direction of each plowing / smoothing claw 2A. It is like that. Further, the auxiliary wheel 5 is also called a ruler wheel, and assists the smooth and stable traveling when the tilling / slope preparation device 1A is pulled. The auxiliary wheel 5 is pivotally supported by a pivot frame 51 provided on the support frame 4A. In the first embodiment, the height from the ground surface to the support frame 4A can be set to a predetermined value by appropriately adjusting the fixed angle of the pivot frame 51 with respect to the support frame 4A.

  Further, the link mechanism 7 plays a role of buffering the upward pressing force received from the ground by the tilling and leveling device 1A, and a fixing bracket 71 fixed substantially horizontally to the connection frame 6, and the fixing bracket It has a pair of rotation brackets 72 and 72 pivotally supported at both ends of 71. And the support frame 4A is pivotally supported by the lower end part of these rotation brackets 72 and 72, and it comprises the parallel link mechanism as a whole. In the first embodiment, a tension spring 73 is provided so as to bridge the pivot brackets 72, 72, and the tension spring 73 biases the support frame 4A to return to the initial position. .

  Below, the effect | action by 3 A of groundbreaking implements in this 1st Embodiment and the tilling and leveling apparatus 1A which attached this is demonstrated.

  First, when plowing work is performed on a farm field using the plowing / smoothing device 1A, the plowing / smoothing claws 2A are arranged so as to be positioned between the reeds. At this time, the tip of each tilling / leveling claw 2A is inserted into the ground to a predetermined depth, and each crushed rod 33 is disposed at a predetermined height from the tip of the tilling / leveling claw 2A. Then, in a state where the plowing / leveling pawl 2A is inserted to a predetermined depth, the ground contact portion 33a of each crushed rod 33 contacts the ground with an appropriate elastic force. Further, since the ground contact portion 33a is curved upward as viewed from the side surface, the ground contact portion 33a moves along the ground surface without being buried in the ground.

  Subsequently, when the tractor is run, the tilling / leveling device 1A is pulled along the fence. Thereby, tilling and leveling claw 2A digs up the soil and scrapes up the mass. At this time, the crushed rod group 34 moves on the ground surface following the vertical movement of the tilling / leveling claw 2A and the unevenness of the ground by the elastic force and the elastic force of the spiral spring 31. For this reason, the crushed rod group 34 is lifted up by the tillage / leveling claw 2A, or rolled up along the tillage / leveling claw 2A and lifted upward to lift the clot. By crushing from the ground, it is pulverized between the plowing and leveling claws 2A to prevent the clod from scattering around. Furthermore, since the dug up soil and the crushed soil mass are knocked down into the plowing trench, the field after the plowing operation can be leveled smoothly.

  In the first embodiment, weeds grown on the field can be removed by the ground contact portion 33a extending to the rear of the tilling / leveling claw 2A. Moreover, since the crushed rod 33 is formed in the plane substantially wave shape from the ground contact part 33a to the front, the area which can be crushed has spread in a plane, and the soil block scraped forward is spread over a wider range. It can be crushed to prevent scattering. Furthermore, since the auxiliary wheel 5 regulates the height of the tilling / leveling device 1A from the ground surface and absorbs and cushions the impact received from the ground by the link mechanism 7, the damage of the tilling / leveling device 1A is prevented. To do. Moreover, it can be used in various fields by appropriately adjusting the left and right mounting positions of the plowing and leveling claws 2A with respect to the support frame 4A.

According to the first embodiment as described above,
1. It is possible to prevent the scattering of the soil scraped up by the plowing / leveling claws 2A, to prevent damage to surrounding crops, and to increase the traveling speed in the plowing work.
2. It is possible to improve the air permeability and water permeability by pulverizing the soil mass by using the force of the soil dug up and lifted by the plowing and leveling claws 2A to make the soil soft and soft.
3. At the same time as the plowing work, the plowing groove is refilled and the land can be leveled quickly and easily without any unevenness.
4). Since the soil in the ground is not scattered, the herbicidal effect can be maintained without covering the soil containing the herbicide from above even if plowing and leveling work is carried out in the field after the herbicide is sprayed. .
5). Since the hard and large soil mass is pulverized, it is possible to produce an effect such that the harvesting operation of crops and the like can proceed smoothly.

  Next, a second embodiment of the tilling / leveling device 1B according to the present invention will be described with reference to the drawings.

  FIG. 6 is a perspective view showing a tilling / leveling device 1B according to the second embodiment. Note that, in the second embodiment, the same or corresponding components as those of the first embodiment described above are denoted by the same reference numerals and the description thereof is omitted.

  The tilling / leveling device 1B of the second embodiment is of a type called a subsoiler or the like, and is formed in a shape suitable for use by the tilling / leveling pawl 2B for deep tillage. Specifically, as shown in FIG. 6, the tilling and leveling claws 2 </ b> B are composed of a vertical pole 21 extending obliquely downward and a horizontal hook 22 provided at the lower end of the vertical pole 21. ing.

  The vertical column 21 is sharply formed at the front edge, and is easy to dig up the soil. In addition, the vertical pole 21 is configured to be slidable in the vertical direction with respect to the support frame 4B, is fixed by a fixing pin 21a, and can adjust the depth of plowing. The horizontal claw 22 has a claw direction fixed in a substantially horizontal direction, and a wing 23 is provided at the rear end thereof. The wing 23 can be adjusted in the vertical direction and the horizontal direction. The ground crushing work tool 3A in the second embodiment is disposed so as to be spaced apart from the horizontal claw 22 at the tip of the tilling / leveling claw 2B by a predetermined distance, and the crushed rod group 34 moves the pole column 21 forward. It is arrange | positioned so that it may branch to right and left, and it surrounds the column 21 from both sides. In the second embodiment, a disk coulter 8 is pivotally supported via a support arm 81 at the front end of the support frame 4B.

  With the above configuration, when the cultivator / leveling claw 2B is inserted into the ground and the tractor is run, the horizontal claw 22 pulverizes the subsoil, and the soil is dug up along the culvert pillar 21 to scrape the clot. At this time, the ground breaking rod group 34 follows the movement in front of the plowing / leveling claw 2B and moves along the ground surface, and therefore uses the force of the soil dug up and lifted by the plowing / leveling claw 2B. Then, the soil block is pressed down from above and pulverized between the tillage and leveling claws 2B and prevented from being scattered around. In addition, the ground is gently leveled in order to smash the excavated soil and crushed soil blocks into the plowing trench and fill them.

  Moreover, in this 2nd Embodiment, the wing 23 provided in the rear-end part of the horizontal nail | claw 22 forms a space | gap along the passage path | route of the horizontal nail | claw 22, and improves the drainage property of soil. . In addition, the disk coulter 8 provided in front of the pole column 21 is in contact with the ground surface to form a guide groove. As a result, the column 21 is pulled forward along the guide groove, so that the resistance when digging up the soil is reduced.

  According to the second embodiment as described above, in addition to the effects of the first embodiment described above, in the subsoiler for deep plowing and the like, it is possible to prevent the excavated soil from scattering and to crush the clot. it can.

  Next, a third embodiment of the tilling / leveling device 1C according to the present invention will be described with reference to the drawings.

  FIG. 7 is a perspective view showing a tilling / leveling device 1 </ b> C of the third embodiment. Note that, in the third embodiment, the same or corresponding components as those of the first embodiment described above are denoted by the same reference numerals and the description thereof is omitted.

  The tilling / leveling device 1C of the third embodiment is also called a soil cultivator, and the tilling / leveling claws 2C are formed in a shape suitable for soil culturing work. Specifically, as shown in FIG. 7, the soil-curved curved portion 24 is formed by bending the forward end of the traveling direction in a concave shape downward, and is expanded rearward from the soil-curved curved portion 24 to the left and right sides. As shown, a pair of cultivating plates 25, 25 are provided. For this reason, the lower end of the tip formed by the pair of cultivating plates 25, 25 is formed in a sharp shape. Further, the plowing / leveling claw 2C is supported by the support frame 4A via the cultivating arm 26.

  On the other hand, the soil crushing work tool 3A is arranged so as to be spaced upward from the lower ends of the culturing plates 25, 25 by a predetermined distance. The ground breaking rod group 34 branches from the front of the plowing / leveling claw 2C to the left and right via the cultivating curved portion 24 and further extends to the vicinity of the cultivating plates 25, 25 on both sides of the plowing / leveling claw 2C. It is installed.

  In the third embodiment, in order to avoid interference with the plowing and leveling claws 2C, the ground breaking rod 33 near the center is formed short and bent slightly upward. However, if emphasis is placed on the above-described crushed soil action and soil scattering prevention action, it is preferable to place the crushed soil action at the same height as the other crushed soil rods 33 and contact the ground surface.

  With the above configuration, when the cultivator / leveling claw 2C is inserted into the ground and the tractor is run, the cultivating soil bending portion 24 digs up the soil and raises the soil upward along the cultivating plates 25 and 25. Send it to the left and right sides. At this time, since the ground contact portion 33a of each crushed rod 33 moves along the ground surface following the movement in front of the plowing / leveling claw 2C, it is dug up by the plowing / leveling claw 2C and lifted up. The soil is pressed from above using the power of the soil to be crushed and crushed between the plowing and leveling claws 2C and prevented from scattering around. In addition, the ground is gently leveled in order to smash the excavated soil and crushed soil blocks into the plowing trench and fill them. And the dug-up soil is embanked on both sides of the plowing / leveling claw 2C to form ridges.

  According to the third embodiment as described above, in addition to the effects of the first embodiment described above, even when soil culturing work is performed, scattering of the excavated soil is prevented and soil blocks are crushed. be able to.

  Next, a fourth embodiment of the tilling / leveling device 1D according to the present invention will be described with reference to the drawings.

  FIG. 8 is a perspective view showing a tilling / leveling device 1D of the fourth embodiment. Note that, in the fourth embodiment, the same or corresponding components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  A feature of the tilling and leveling device 1D according to the fourth embodiment is that a saddle-shaped roller 35 is used as the ground breaking work tool 3D. Specifically, as shown in FIG. 8, the crushing work tool 3D includes a bowl-shaped roller 35 formed in a substantially cylindrical bowl shape, and a roller arm for pivotally supporting the bowl-shaped roller 35 on the support frame 4A. 36. The bowl-shaped roller 35 has a pair of discs 35b and 35b that support the rotation shaft, and a plurality of crushed rods 35a that are supported by the discs 35b and 35b in a substantially columnar shape. It arrange | positions at predetermined intervals upwards from the front-end | tip of leveling claw 2A. And the crushed rod 35a located in the lower end part of the saddle-shaped roller 35 is arrange | positioned so that it may contact | abut to the ground surface in the front vicinity of 2A of tillage and leveling claws. The roller arm 36 is swingably supported so that the roller-shaped roller 35 can move up and down by the force received from the ground surface. Note that the roller arm 36 may be biased by a biasing member such as a spring in a direction in which the bowl-shaped roller 35 contacts the ground surface.

  With the above configuration, when the plowing / leveling claw 2A is inserted into the ground and the tractor is run, the tilling / leveling claw 2A rakes up the soil mass while digging up the soil. At this time, the bowl-shaped roller 35 always makes the crushed rod 35a contact with the ground surface by its own weight, and follows the vertical movement in front of the plowing / leveling claw 2A. Then, in order to bring the lower crushed rod 35a into contact with the ground surface one after another while rotating, the soil mass is pressed from above by using the force of the soil dug up and lifted by the tilling and leveling claws 2A -While pulverizing with the leveling claw 2A, it is prevented from scattering around. In addition, the ground is gently leveled in order to smash the excavated soil and crushed soil blocks into the plowing trench and fill them.

  According to the fourth embodiment as described above, in addition to the effects of the first embodiment described above, the crushing roller 35 can improve the soil breaking effect.

  In addition, the crushed working tools 3A, 3B, and 3D according to the present invention and the tilling and leveling devices 1A to 1D to which these are attached are not limited to the above-described embodiments, and can be appropriately changed.

  For example, in each of the above-described embodiments, the crushing work tools 3A and 3D are installed only on one plowing and leveling claw 2A, 2B, and 2C. However, the present invention is not limited to this, and all plowing and leveling are performed. You may make it provide with respect to nail | claw 2A, 2B, 2C. Further, a weeding tine or a pressure reducing roller may be separately provided behind each of the tilling / leveling claws 2A, 2B, 2C. Thereby, the tine for weeding removes weeds from the soil after tillage, and the roller for compaction has an effect of compacting while crushing the soil after tillage.

It is a perspective view which shows 1st Embodiment of the tilling and leveling apparatus which concerns on this invention. It is a side view showing the tilling and leveling device of the first embodiment. It is a perspective view which shows the earth-crushing work tool of this 1st Embodiment. It is a side view which shows the earth-crushing work tool of this 1st Embodiment. It is a perspective view which shows the other Example of the crushing work tool of this 1st Embodiment. It is a perspective view which shows the tilling and leveling apparatus of this 2nd Embodiment. It is a perspective view which shows the tilling and leveling apparatus of this 3rd Embodiment. It is a perspective view which shows the tilling and leveling apparatus of the fourth embodiment.

Explanation of symbols

1A, 1B, 1C, 1D Tilling and Leveling Equipment 2A, 2B, 2C Tilling and Leveling Claws 3A, 3B, 3D Crushing Work Tool 4A, 4B Support Frame 5 Auxiliary Wheel 6 Connection Frame 7 Link Mechanism 8 Disc Coulter 21 Anchor Pillar 21a Fixing pin 22 Horizontal claw 23 Wing 24 Soil curved portion 25 Soil plate 26 Soil arm 31 Spiral spring 32 Support plate 32a Comb-shaped slit portion 32b Fixed plate 33 Ground breaker rod 33a Ground contact portion 34 Ground rod group 35 Saddle roller 35a Crushing rod 35b Disk 36 Roller arm 51 Pivot frame 71 Fixed bracket 72 Rotating bracket 73 Tension spring 81 Support arm B Bolt

Claims (5)

A soil crushing work tool that is attached to a plowing and leveling device used for soil plowing, deep plowing, cultivating work, etc. in the field,
It comprises a group of crushed rods consisting of a plurality of crushed rods supported on a support plate in the shape of a plane fan or a plane parallel to the plane,
Each crushed rod has its rear end portion bent in a substantially wave shape in the horizontal direction when viewed from the plane and curved upward when viewed from the side, or elastically deformed when contacting the ground. It has a ground contact portion that can be curved upward along the ground,
The crushed rod group is spaced apart from the tip of the plowing / leveling claw for digging up the soil provided in the plowing / leveling device, and near both sides from the front of the plowing / leveling claw A ground breaking work tool for a plowing and leveling device, characterized in that it is placed over the ground. Oite in Harrow work tool according to claim 1, wherein Harrow rod group in the ground contact portion, plowing, characterized in that it extends further to the rear from the vicinity of both side faces of the plowing-grading pawl・ Soil breaker for ground leveling equipment. Oite in Harrow work tool according to claim 1 or claim 2, wherein each of Harrow rod, plowing, characterized in that it is formed in a plane substantially wave shape to a more forward portion of the ground contact portion・ Soil breaker for ground leveling equipment. A soil crushing work tool that is attached to a plowing and leveling device used for soil plowing, deep plowing, cultivating work, etc. in the field,
It is equipped with a saddle-shaped roller that is pivotally supported in front of the plowing and leveling claw to dig up the soil provided in the plowing and leveling device.
The bowl-shaped roller has a disk that supports the rotation shaft, and a plurality of crushed rods that are supported by the disk in a substantially cylindrical bone shape,
The saddle roller is disposed at a predetermined interval upward from the tip of the tilling / leveling claw so that the lower ground rod can contact the ground surface, and is dug by the tilling / leveling nail. A soil crushing work tool for a plowing and leveling device, wherein the soil block to be raised is disposed so as to be crushed between the plowing and leveling claws. Intertillage and cultivating the soil in the field, a plowing-terrain device for use in soil working, etc., plowing, leveling device Ri attached comprising preparative Harrow working tool according to any one of claims 1 to 4 .

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