JP2011015636A - Spreader of fertilizer applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform diffusing fertilization almost uniform in the right and left directions with a nozzle body in a ridge without being disturbed with surrounding soil by connecting the nozzle body of an oblong cylindrical form and a rear spreading form to the rear to the lower end of a guide body for feeding a fertilizer and forming a raised part in the center of a releasing passage in the interior of the nozzle body.SOLUTION: A spreader of a fertilizer applicator includes the cylindrical guide body 3 for feeding the fertilizer H from a fertilizer tank 2, and the nozzle body 4 connected to the lower end of the guide body 3, and inserted into the ridge U. The nozzle body 4 has the oblong cylindrical form, connected to the guide body 3 and in the rear spreading form from the front to the rear. The releasing passage 5 for diffusing the fertilizer H, and releasing the fertilizer is formed in the interior thereof, and the raised part 6 for suppressing the amount of the fertilizer H1 passing through the center, and uniformizing the amount of the released fertilizer H1 from the center of the releasing passage 5 and the amounts of the released fertilizers H2 and H3 from the lateral parts of right and left is formed in the center in the right and left directions at the bottom of the releasing passage 5.

Description

  The present invention relates to a spreader for a fertilizer application device that diffuses and fertilizes fertilizer in a basket.

2. Description of the Related Art Conventionally, there is known a fertilizer nozzle that is provided in a fertilizer applied to a work machine that is pulled by a tractor and that is used by being inserted into a basket in the middle of molding.
The fertilizer nozzle is integrally attached to the front surface of the lower end of the pipe-shaped nozzle body with the groove forming member extending substantially downward, and the fertilizer nozzle is moved forward while being inserted into the ridge. A fertilizer groove can be formed behind the groove member. In addition, the fertilizer nozzle has a fertilizer outlet at the lower end of the nozzle body and at the upper end of the grooved member. The fertilizer discharged from the fertilizer outlet is guided by the grooved member and reaches the bottom of the fertilizer groove. By making it, it is comprised so that a fertilizer discharge port may not be filled with soil (refer patent document 1).

JP 2006-230293 A

As the groove forming member of the conventional fertilization nozzle, a substantially trapezoidal groove forming plate extending downward from the lower end portion of the fertilization nozzle is used. A substantially semi-cylindrical fertilizer guide body that is uniformly distributed over the entire width direction of the fertilizer groove is formed along the left-right direction.
However, the grooved plate is a plate-like body, and the back surface (upper surface) is exposed. When fertilizer is flowing down on this back surface, the soil around the fertilizer groove collapses and hinders the spread of fertilizer. Therefore, it is difficult to spread the fertilizer evenly over the entire width direction of the fertilizer groove.

  In view of the above, the present invention has a nozzle body connected to the lower end of a guide body for supplying fertilizer having a horizontally long cylindrical shape and a rear end widening shape, and is raised at the center of the discharge path inside the nozzle body. It is an object of the present invention to provide a spreader for a fertilizer application device that can easily perform substantially uniform fertilization in the horizontal direction with a nozzle body in a basket without being obstructed by surrounding soil.

In order to solve the above-described problems, the following technical means are employed in the spreader of the fertilizer application device according to the present invention.
First, it has a cylindrical guide body 3 that supplies the fertilizer H from the fertilizer tank 2 and a nozzle body 4 that is connected to the lower end of the guide body 3 and inserted into the rod U. It is a spreader of a fertilizer application device for fertilizing fertilizer H in the ridge U, wherein the nozzle body 4 is a horizontally long cylindrical shape and has a shape that spreads backward from the front to the rear connected to the guide body 3, The discharge path 5 for diffusing and discharging the fertilizer H is formed, and the central portion of the discharge path 5 is suppressed at the central portion in the left-right direction on the bottom surface of the discharge passage 5 while suppressing the amount of the fertilizer H1 passing through the central portion. A raised portion 6 that equalizes the amount of fertilizer H1 released from the left and the amount of fertilizer H2 and H3 released from the left and right sides is formed.

Second, a central groove cutting body 7 projecting downward is provided at the center in the left-right direction of the outer bottom surface of the nozzle body 4.
Third, the right and left side portions of the outer bottom surface of the nozzle body 4 are provided with side grooved bodies 8 projecting downward and having a projecting length shorter than the central grooved body 7.
Fourthly, the lower portion of the guide body 3 is formed in a substantially elliptical cross section or a substantially elliptical cross section that is long in the front-rear direction.
Due to these characteristics, the discharge body 5 is connected to the lower end of the guide body 3 for supplying the fertilizer H and is connected to the nozzle body 4 having a horizontally long cylindrical shape and the rear end widening shape, and the fertilizer H is diffused and discharged inside the nozzle body 4. By forming the raised portion 6 at the center in the left-right direction on the bottom surface, the amount of fertilizer H1 discharged from the center of the discharge path 5 and the left and right in the soil of the fence U without being disturbed even if the surrounding soil collapses. The amount of the fertilizers H2 and H3 discharged from the side portions can be leveled, and the fertilizer H can be diffused substantially uniformly over the fertilizer application width inside the nozzle body 4.

Further, by providing a central groove cutting body 7 projecting downward in the left-right direction center of the outer bottom surface of the nozzle body 4, it is possible to dig and groove the soil of the ridge U below the left and right center of the nozzle body 4, and discharge into the soil. It becomes possible to fertilize the fertilizer H in the center at a deeper position in the basket U.
Further, by providing side grooved bodies 8 that protrude downward on the left and right side portions of the outer bottom surface of the nozzle body 4 and whose projection length is shorter than the central grooved body 7, below the left and right side parts of the nozzle body 4. The soil of the ridge U is dug shallower than the depth dug by the central grooving body 7, and the fertilizer H is sprayed into the ridge U so as to have a substantially circular arc cross section below the nozzle body 4. it can.

  And by forming the lower part of the guide body 3 into a substantially oval cross section or an elliptical cross section which is long in the front and rear, the resistance in the front and rear direction of the lower part of the guide body 3 in the soil is reduced, and the guide body 3 in which the lower part is buried. Can be easily advanced in the cage U.

  According to the present invention, the nozzle body connected to the lower end of the guide body for supplying fertilizer has a horizontally long cylindrical shape and a rear end widened shape, and a bulge is formed at the center of the discharge path inside the nozzle body, It is possible to easily perform diffusion fertilization that is substantially uniform in the left-right direction in the nozzle body without being obstructed by the soil that has collapsed.

The side view of the rotary tiller which mounts the fertilizer application concerning the present invention. The perspective view of the spreading tool of a fertilizer applicator. The rear perspective view of a spreading tool. The principal part top view of a spreading tool. The front view of the spreading tool in a basket and the spread fertilizer. The rear perspective view of a rotary tiller. The perspective view which shows the attachment part of a spreading tool. The front view of the tilling nail | claw of the rotary tiller which concerns on a comparative example. The principal part perspective view of a tilling nail.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 5 to 7 show a rotary tiller 21 on which a fertilizer application 47 is mounted, and FIGS. 2 to 4 show a spreader 1 according to the present invention attached to the fertilizer application 47.
The rotary cultivator 21 includes a rotary cultivator 31, a culvert former 41, and a fertilizer application 47, and is supported by a rotary machine frame 23 that is connected to a rear portion of the tractor T through a link mechanism 22 so as to be movable up and down. Yes.
The rotary machine frame 23 includes a support arm 25 projecting from the left and right support arms 25 from the gear case 24 at the center in the left-right direction, a fertilizer machine frame 26 extending upward from the left and right support arms 25, and the gear case 24. A top mast 27 fixed in an upward projecting manner, and a transmission case 28 having an upper portion connected to the lower end side of the gear case 24.

A claw shaft 30 having a plurality of cultivating claws (claw claw type) 29 for cultivating the field F is provided below the transmission case 28 so as to be rotatable about the left and right axis centers to form a rotary cultivating portion 31. .
The rotary tiller 31 is a center drive drive system, and the driving force from the PTO shaft of the tractor T is transmitted to the claw shaft 30 via a transmission mechanism provided in the gear case 24 and the transmission case 28. As the claw shaft 30 rotates in the direction of the arrow X in FIG. 1, the tilling claw 29 plows and reverses the soil and crushes the soil.

The rotary tiller 31 may employ a side drive type.
The rotary machine frame 23 supports a tilling cover 32 that covers the rotary tilling portion 31.
The tillage cover 32 is an arcuate plate body in a side view that covers the upper side of the rotary tillage portion 31, and is rotatable about the axis of the claw shaft 30 with respect to the rotary machine frame 23 by the attaching means 33. And it is attached to the rotary machine frame 23 so that it can be fixed at an arbitrary rotational position.
The attachment means 33 has a pair of left and right fixed brackets 34 fixed to the left and right support arms 25, and a pair of left and right movable brackets 35 fixed to the upper surface of the tillage cover 32.

Each of the left and right movable brackets 35 is formed with a pair of front and rear arc-shaped elongated holes 35 a centering on the axis of the claw shaft 30, and the tillage cover 32 is centered on the claw shaft 30 together with the movable bracket 35 with respect to the rotary machine frame 23. The tillage cover 32 is fixed to the rotary machine frame 23 at an arbitrary rotation position by fastening the fixed bracket 34 and the movable bracket 35 with fasteners 36 such as screws and bolts. It is configured.
The movable bracket 35 extends rearward, and a support frame 37 is fixed to the extended portion. The support frame 37 and the tilling cover 32 are provided with a tack forming device 41 for forming the tack U, and the tilling cover 32, the support frame 37, and the tack forming device 41 support the claw shaft 30 with respect to the rotary machine frame 23. The angle can be adjusted as the center.

As a result, even when the plowing depth of the rotary plowing portion 31 is changed by the height adjusting portion 46 of the gauge ring 44 described later, the attachment means 33 is adjusted to support the hull former 41 substantially horizontally and the support frame 37. The spreader 1 attached to the can be kept at a predetermined height.
The support frame 37 includes a tool bar 38 disposed in the left-right direction at the rear ends of the left and right movable brackets 35, and a fixture 39 provided in the middle of the tool bar 38 in the left-right direction.
The toolbar 38 is configured by a square pipe or the like, and is connected to the rear end of the left and right movable bracket 35 by welding or the like.

As shown in FIGS. 1, 6, and 7, the attachment 39 is for attaching the spreader 1 in the fertilizer application 47, and is provided at two positions in the left-right direction of the tool bar 38 and symmetrically. Yes.
On the lower side of the support frame 37, a pair of left and right guide plates 40 that guide the soil discharged rearward from the rotary tillage portion 31 to the center in the left-right direction, and extending rearward from the inner edges of the left and right guide plates 40. A wrinkle forming device 41 is provided.
The guide plate 40 has two plate-like bodies arranged in a substantially C shape in a plan view, and has a ridge forming port 40a formed between the left and right guide plates 40, and the earth released to the rear. Are collected at the center ridge forming port 40a and guided to the ridge forming device 41 at the rear. The left and right guide plates 40 have a circular arc shape slightly inclined backward, and can scrape the soil plowed by the rotary tiller 31 and released to the rear.

As shown in FIGS. 1 and 6, the scissors molding machine 41 is attached to the top plate 42 extending substantially rearward from the scissor forming port 40 a and the left and right ends of the top plate 42 in a substantially C shape in the rear view. It has a pair of left and right side plates 43, and the top plate 42 and the left and right side plates 43 are provided along the edge of the bowl forming port 40a.
The top plate 42 is a plate body whose front end is attached between the left and right guide plates 40 and above the bowl forming port 40a, and is arranged so as to gradually lower toward the rear, and along the top plate 42 Thus, the upper surface of the ridge U is formed. Further, the top plate 42 is formed with an insertion hole 42a through which a guide body 3 of the spreader 1 described later is inserted.

Each of the left and right side plates 43 is a plate-like body attached along the side edge of the flange forming port 40a and along the side edge of the top plate 42, and is arranged so as to expand toward the left and right in the rear view as shown in FIG. Yes. A side surface of the ridge U is formed by the soil along each side plate 43. That is, the soil cultivated by the rotary cultivating unit 31 passes through the cocoon molding machine 41 to form the cocoon U having a substantially trapezoidal cross section.
On the other hand, on both the left and right sides of the rod forming machine 41, gauge wheels (gauge members) 44 that roll on the left and right sides of the rod U and determine the tilling depth of the rotary tiller 31 are disposed.
The left and right gauge wheels 44 are rotatably supported by a support frame body 45 that is swingably attached to a middle portion of the left and right support arms 25, and the gauge wheel 44 extends across the support frame body 45 and the top mast 27. A height adjustment unit 46 that adjusts the height of the ring 44 is provided.

As shown in FIGS. 1, 6, and 7, the fertilizer application 47 includes the fertilizer machine frame 26 described above, a pair of left and right fertilizer tanks 2 that are supported by the fertilizer machine frame 26 and store the fertilizer H, and these left and right fertilizers. The left and right fertilizer feed mechanisms 48 that are respectively attached to the lower end side of the tank 2 and feed out the fertilizer H, the guide hoses 49 that guide the fertilizer H fed from the fertilizer feed mechanisms 48 downward, and the guide hoses 49 And the right and left spreading tools 1 for spreading the fertilizer H sent by the rear of the rotary tillage part 31 and in the basket U.
The fertilizer machine frame 26 can be supported by a left and right support column 50 that is swingably attached to a middle part in the left and right direction of each of the left and right support arms 25, and the height of the left and right support column receiver 50 can be adjusted by a fixture 51 a. It has left and right support columns 51, a horizontal beam member 52 that is installed between the upper ends of the left and right support columns 51, and is fixed to the support column 51, and a tank mounting frame 53 that is fixed to the horizontal beam member 52.

Each strut receiver 50 is supported by a swing bracket 50a provided on the upper surface of a middle portion in the left-right direction of each support arm 25 so as to be rotatable about the left-right axis.
A link connecting portion 52a to which the connecting rod 22a of the link mechanism 22 is connected is provided at a substantially central portion in the left-right direction of the cross beam member 52, and the swinging of the left and right column supports 50 and the columns 51 is restricted. By adjusting the length of the connecting rod 22a, the level of the fertilizer tank 2 can be adjusted.
The fertilizer tank 2 is attached to the tank mounting frame 53 one on each of the left and right sides. The hopper 2a has an upper opening shape that tapers downward and has a discharge port at the lower center, and an upper opening portion of the hopper 2a. And a lid 2b for closing. Therefore, the fertilizer H such as granular or powder in the fertilizer tank 2 gathers at the lower center of the hopper 2a and is sent to the fertilizer feeding mechanism 48 from the discharge port.

The fertilizer feeding mechanism 48 includes a casing 48a provided at the lower end of the fertilizer tank 2, and a feeding roll 54 that is rotatably supported inside the casing 48a.
The feeding roll 54 is a cylindrical body that can rotate at a predetermined rotational speed around the left-right axis, and a plurality of fertilizer feeding recesses 54a are formed on the circumferential surface at predetermined intervals along the circumferential direction. ing. Moreover, the feed amount of the fertilizer H can be adjusted by adjusting the rotation speed of the feed roll 54.
The fed fertilizer H is supplied to the left and right spreaders 1 through the guide hose 49.

As shown in FIGS. 1 to 7, the spreader 1 is connected to the guide body 3 that supplies the fertilizer H from the guide hose 49 downward, and to the lower end of the guide body 3 and is inserted into the basket U. And a nozzle body 4.
The guide body 3 is a cylindrical body attached to the lower end of the guide hose 49, and as shown in FIGS. 3a is formed, and the lower portion constitutes an in-soil insertion portion 3b having a diameter that is smaller than that of the mounting portion 3a and that is long in the front-rear direction and having a substantially oval cross section or a substantially oval cross section.

The attachment hose 49 is connected to the guide hose 49 at the upper end, and the fertilizer H from the fertilizer tank 2 is fed into the guide body 3. Further, the attachment portion 3 a is formed in a substantially circular cross section having a predetermined length from the upper end of the guide body 3, and is attached to be attached to the attachment 39 of the tool bar 38.
The fixture 39 includes a bracket portion 39a that externally fits the peripheral surface of the square pipe-shaped toolbar 38, and a cylindrical insertion portion 39b that is attached to the rear surface of the bracket portion 39a and allows the guide body 3 to be inserted therein. Have. A rear portion side of the peripheral surface of the insertion portion 39b is open, and a fixed body 39c is provided through which the attachment portion 3a of the guide body 3 can be moved in the radial and external directions. The height of the guide body 3 can be adjusted according to the intended fertilization depth in the ridge U by pressing and fixing the fixed body 39c to the outer peripheral surface of the mounting portion 3a with a fixing tool such as a screw or a bolt.

The underground insertion portion 3b extends downward from the lower end of the attachment portion 3a and is buried in the ridge U through the insertion hole 42a of the top plate 42 of the ridge forming device 41. It is formed in a substantially oval shape or a substantially oval shape so as to be thinner. Accordingly, the resistance in the front-rear direction of the soil insertion portion 3b in the soil of the cage U is reduced, and the guide body 3 can be easily advanced in the cage U. The soil insertion portion 3b is a nozzle body in the soil from the lower end. The fertilizer H will be sent to 4.
The nozzle body 4 has a front portion connected to the lower end of the guide body 3 and has a horizontally long cylindrical shape that is widened rearward from the front portion to the rear portion and opened rearward (this opening portion is referred to as a discharge port 4e). ing.

  Specifically, as shown in FIGS. 3 and 4, a substantially trapezoidal upper wall 4 a attached to the opening edge of the lower end of the guide body 3 by welding or the like and extending so as to widen from the front to the rear, The front wall 4b extending downward from the front edge of the upper wall 4a, the left and right side walls 4c extending downward from the left and right side edges of the upper wall 4a, and attached to the lower ends of the front wall 4b and the left and right side walls 4c And a bottom wall 4d having substantially the same shape. The cylindrical nozzle body 4 communicates with the guide body 3 and is attached to the lower end of the guide body 3 so as to incline downward as it goes rearward. The fertilizer H that has entered from the guide body 3 Rolls inside the nozzle body 4 and is discharged into the bag U from the rear.

A substantially trapezoidal discharge path 5 is provided on the upper surface of the bottom wall 4d, which is the inside of the nozzle body 4, so that the fertilizer H from the guide body 3 is diffused in the left-right direction so that the amount of the fertilizer H discharged is substantially equal in the left-right direction. It has been.
The left and right widths of the discharge path 5 and the nozzle body 4 are formed wider than the left and right widths of the guide body 3 from the front part to the rear part, and when the nozzle body 4 advances through the soil, the nozzle body 4 and the discharge body 5 are discharged. The portion projecting outward in the left and right direction from the left and right width of the guide body 3 in the path 5 advances while cutting the soil in a wider range than the soil insertion portion 3b having a narrow left and right width of the guide body 3.
However, since the upper part of the discharge path 5 is covered with the upper wall 4a, it is possible to prevent the soil from entering from above the discharge path 5 even when the nozzle body 4 is moving in the soil and the soil is broken. It does not hinder the left and right diffusion of the fertilizer H.

As shown in FIGS. 2 to 4, a raised portion 6 that diffuses the fertilizer H substantially uniformly in the left-right direction is provided at the center in the left-right direction on the bottom surface of the discharge path 5.
The protruding portion 6 has a distal end portion 6a that begins to gently bulge upward from the bottom wall 4d and is positioned rearward from the opening at the lower end of the guide body 3 by a predetermined length, and extends laterally from the distal end portion 6a to the downstream end. A bulging portion 6b located at the center is formed by bulging the bottom wall 4d upward. Therefore, the fertilizer H that has entered the nozzle body 4 from the lower end of the guide body 3 first hits the tip portion 6a of the raised portion 6, and fertilizers H2 and H3 that are diffused substantially evenly to the left and right, and the fertilizer H1 that flows straight down as it is. Divided into

  The branched fertilizers H <b> 1 to H <b> 3 roll toward the downstream side on the left and right flat portions (referred to as flat portions 4 f and 4 g) of the raised portion 6 and the discharge path 5, and are fed from the downstream end of the discharge path 5 The amount of fertilizer H discharged into the interior and discharged from the lower end of the discharge path 5 (the amount of fertilizer H released) is approximately equalized over the left-right direction of the nozzle body 4. That is, by forming the raised portion 6 that bulges upward, the momentum of the fertilizer H that falls straight from the guide body 3 is scraped, and the distance between the upper wall 4a and the bottom wall 4d at the center in the left-right direction is reduced. By doing, the quantity of the fertilizer H1 which passes along the center part of the discharge path 5 can be suppressed. As a result, the discharge amount of the fertilizer H1 from the central portion of the discharge path 5 and the discharge amounts of the fertilizers H2 and H3 from the left and right side portions can be made substantially equal.

In addition, since the protruding part 6 protrudes upward to the lower end of the discharge path 5, the vertical width of the center part of the discharge port 4e is formed narrower than the vertical width of the left-right side part.
The nozzle body 4 is provided so as to extend rearward and downward at an angle of about 30 degrees in a side view with respect to the traveling direction (substantially horizontal direction) of the spreader 1 in the soil. As a result, the nozzle body 4 has a rearward downward inclination that is necessary for the fertilizer H to roll while diffusing, and that reduces the resistance of the nozzle body 4 in the soil as much as possible.
On the lower surface of the bottom wall 4d of the nozzle body 4 (outer bottom surface of the nozzle body 4), a central groove cut body 7 and a pair of left and right side groove cut bodies 8 positioned on the left and right outer sides of the central groove cut body 7 are provided. Provided.

The central grooved body 7 is a substantially triangular columnar body that protrudes rearward and downward from a position substantially along the periphery of the raised portion 6 at the center in the left-right direction of the bottom surface of the bottom wall 4d, and extends rearward from the front to the rear. A substantially triangular plate material is bent into a substantially V-shaped cross section. That is, the central groove cutting body 7 advances while scraping and digging the soil immediately below the central portion in the left-right direction of the nozzle body 4.
The side groove cut body 8 protrudes rearward and downward from the left and right side portions of the outer bottom surface of the bottom wall 4d (the outer bottom surfaces of the flat portions 4f and 4g of the bottom wall 4d), and is substantially similar to the central groove cut body 7 The column body 8a is formed in a small size, and a rod body 8b having a substantially circular cross section provided forward along the sharp front side of the column body 8a. The rod 8b is curved backward so that the rear end winds around the tip of the column 8a, and the rear end surface of the rod 8b and the rear surface of the column 8a are substantially flush with each other in a side view.

The protruding length of the side grooved body 8 (as a whole of the column body 8a and the rod body 8b) downward is set to be shorter than that of the central grooved body 7, and directly below the left and right side portions of the nozzle body 4. Therefore, the soil at a position shallower than the central groove cut body 7 is scraped.
Further, the front-rear length of the columnar body 8 a and the bar 8 b in the side grooved body 8 is set slightly shorter than that of the central grooved body 7.
The usage aspect of the rotary tiller 21 equipped with the spreading tool 1 of the fertilizer application 47 according to the first embodiment will be described.

First, the rotary cultivator 21 lowered to the field F is pulled by the tractor T and the field F is cultivated by the rotary cultivator 31.
Next, the cultivated soil is collected in the center by the guide plate 40 at the rear of the rotary cultivating section 31, and when the soil passes through the ridge forming device 41, the ridge U is formed and simultaneously formed. Fertilizer H is sprayed from the spreader 1 in U.
Here, the fertilizer H from the fertilizer tank 2 is supplied into the nozzle body 4 through the guide hose 49 and the guide body 3. The supplied fertilizer H collides with the raised portion 6 of the discharge path 5 inside the nozzle body 4 and is dispersed not only in the center but also in the left and right sides. The amount of fertilizer H1 discharged from the center in the discharge path 5 and the left and right side portions The amount of the fertilizers H2 and H3 released is leveled, and the fertilizer H can be diffused substantially uniformly over the entire fertilizer application width in the basket U.

At this time, as shown in FIG. 5, the central groove cutting body 7 advances while scraping and digging the soil immediately below the nozzle body 4, and a space is formed immediately after the central groove cutting body 7, so that the cross section is approximately V. The letter-shaped groove M1 is cut, and the fertilizer H1 discharged into the soil from the center of the discharge path 5 is sprayed on the bottom of the groove M1.
At the same time, the soil immediately below the left and right side portions of the nozzle body 4 is scraped by the left and right side groove cut bodies 8, and the space formed immediately after the left and right side groove cut bodies 8 (grooves M2 and M3 having a substantially V-shaped cross section). ), And the depths of the grooves M2 and M3 are shallower than the depth of the groove M1 formed by the central groove 7 as shown by a one-dot chain line in FIG.

Therefore, the fertilizers H2 and H3 discharged from the left and right side portions of the discharge path 5 are sprayed on the bottoms of the shallow grooves M2 and M3, so that, as shown in FIG. The fertilizer H can be sprayed in the ridge U so as to have a substantially circular arc shape in the ridge cross section.
Thereby, the fertilizer H required for growth can be locally sprayed only in the root region of the cultivated vegetable, and the fertilizer H can be utilized without waste to reduce fertilizer. In particular, since the roots of leafy vegetables such as lettuce and cabbage are not burned with fertilizer, fertilizer H can be sprayed in a substantially arc shape around the root area in the cocoon U, so that unnecessary fertilizer H can be reduced as much as possible. .

8 and 9 show a fertilizer application-type rotary tiller 61 according to a comparative example, and a tilling claw 62 attached to the rotary tiller 61.
The difference between the comparative example and the first embodiment is that the fertilizer is applied in front of the rotary tiller 31 and the tiller nail 62 for local agitation different from the nail type tillage nail 29 in the first embodiment. And having a point.
The rotary cultivator 61 hangs the guide hose 63 from the front of the tillage cover 32, and the fertilizer H is sprayed on the field F before being cultivated. This spraying position is in front of a tilling claw 62 described later, and the fertilizer H is plowed and stirred by the rotary tiller 31 together with the soil.

The rotary tilling part 31 in the comparative example has a tilling claw 62 that locally agitates the fertilizer H on the outside of the inclined claw shaft 30a arranged on the left and right outside from the transmission case 28. The tilling claw 62 is fixed to a claw bracket 30b attached to the claw shaft 30 by a fixing tool 30c such as a screw or a bolt.
As shown in FIG. 9, the tilling claw 62 is a short-type claw, and is bent into about a 40 ° inward in the left-right direction in the middle in a side view, and this bent portion ( Blades 62b for cutting and stirring the soil are provided on both side edges of the bent portion 62a. Because of such a double-edged shape, the same shape of the tilling claw 62 can be used on both the left and right sides of the claw shaft 30. On the proximal end side of the tilling claw 62, a fixing hole 62c through which the fixing tool 30c is inserted is provided.

The length of the tilling nail 62 is set to be shorter than the nail type tilling nail 29 (the vertical length including the bent portion 62a is about 12 cm), and the fertilizer H sprayed forward is limited. It becomes possible to stir and mix the fertilizer H only in the root area of the vegetable to be stirred.
Further, the plurality of tilling claws 29 extend radially from the claw shaft 30 in a side view, but one tilling claw 62 for local stirring is provided on each of the left and right sides, and the stirring range is suppressed. The tilling nail 62 may have a length and a bending angle according to the root area of the vegetable to be cultivated.
In addition, this invention is not limited to embodiment mentioned above. Each structure of the spreader 1 etc. of the fertilizer application apparatus 47, or the whole structure, shape, dimension, etc. can be suitably changed along the meaning of the present invention.

The soil insertion portion 3b of the guide body 3 may have the same diameter as the mounting portion 3a and a substantially circular cross section, or an angle member may be provided on the front side of the soil insertion portion 3b to reduce resistance in the soil. Good.
If the fertilizer H rolls inside and diffuses in the left-right direction, the nozzle body 4 is attached to the guide body 3 at an angle slightly inclined downward from substantially horizontal so that the resistance in the soil is reduced as much as possible. It may be.
The central groove body 7 may have a rod body having a substantially circular cross section on the front side.
The central groove 7 and the side grooves 8 may not be provided, and at this time, the fertilizer H is spread in a substantially horizontal row at a predetermined depth in the ridge U.

Alternatively, only the central groove 7 may be provided and the side groove 8 may not be provided. In this case, the central groove 7 forms a groove M1 having a substantially V-shaped cross section, and the inside of the ridge U Thus, the fertilizer H can be sprayed in a substantially V shape around the root of the vegetable.
Further, the side grooved body 8 may be only the column body 8a and not the rod body 8b.

DESCRIPTION OF SYMBOLS 1 Spreader of fertilizer application 2 Fertilizer tank 3 Guide body 4 Nozzle body 5 Release path 6 Raised part 7 Central groove cut body 8 Side groove cut body H Fertilizer H1 Fertilizer passing the center part of discharge path H2, H3 Left and right of discharge path Fertilizer passing through the side U 畝

Claims (4)

A cylindrical guide body (3) for supplying fertilizer (H) from the fertilizer tank (2), and a nozzle body (4) connected to the lower end of the guide body (3) and inserted into the tub (U) And a spreader for a fertilizer applying fertilizer (H) in the basket (U),
The nozzle body (4) has a horizontally long cylindrical shape and has a shape that spreads rearward from the front part to the rear part connected to the guide body (3). 5) is formed,
At the center in the left-right direction on the bottom surface of the discharge path (5), the amount of fertilizer (H1) released from the center of the discharge path (5) while suppressing the amount of fertilizer (H1) passing through the center is A spreader for a fertilizer applying apparatus, wherein a raised portion (6) is formed to equalize the amount of fertilizer (H2, H3) released from the left right side.   The spreader for a fertilizer application device according to claim 1, wherein a central groove cutting body (7) projecting downward is provided at the center in the left-right direction of the outer bottom surface of the nozzle body (4).   A side grooved body (8) protruding downward and having a projecting length shorter than the central grooved body (7) is provided on the left and right sides of the outer bottom surface of the nozzle body (4). Item 3. A fertilizer application tool according to Item 2.   The spreader of the fertilizer application device according to any one of claims 1 to 3, wherein a lower part of the guide body (3) is formed in a substantially elliptical cross section or a substantially elliptical cross section that is long in the front-rear direction. .

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