Fertilizer spreader and walking-type management machine equipped with said fertilizer spreader

Abstract

To provide a small-sized fertilizer distributor for a walking-type power tiller, which can perform fertilizer distribution by making use of vibrations generated by the power tiller, without use of rotary drive and the like by electric power and the like.SOLUTION: A fertilizer distributor, which is mounted on a self-propelled walking-type power tiller comprising a rotary tillage part, includes: a fertilizer tank for storing a fertilizer; a distribution amount control part for controlling a fertilizer distribution amount; and a fertilizer distribution hose for distributing the fertilizer and a fixing arm. The fertilizer distributor employs a constitution in which a fertilizer distribution opening of the fertilizer distribution hose is arranged in front of the rotary tillage part of the walking-type power tiller.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fertilizer spreader and a self-propelled walk-behind cultivator equipped with the fertilizer spreader. [Background technology]

[0002] Generally, in order to ensure smooth spreading, fertilizer spreaders for fields, etc., often move and spread the fertilizer by rotating or driving with power such as electricity. However, these power-driven spreaders tend to have a complex structure, are large, and heavy.

[0003] Meanwhile, in the cultivation and management of so-called long onions, the rows are planted with narrow spacing, so a large space is not available. Therefore, it was not possible to work with a large, powered fertilizer spreader attached to a cultivator. Therefore, when performing the work of spreading fertilizer and the work of raising the soil, two tasks were required: first, the fertilizer was spread by hand on each row, and then the soil was raised with the cultivator, which was inefficient. Therefore, there was a demand for a small fertilizer spreader for walk-behind cultivators that could smoothly spread fertilizer between narrow rows.

[0004] Various fertilizer spreading techniques have been proposed in the past. For example, a fertilizer spreading technique attached to a rotary tillage device has been proposed (see Patent Document 1), and is a publicly known technique. More specifically, the rotary tillage device is attached to the rear of a tractor and includes a rotary tillage tine unit, a guide plate, a fertilizer hopper, and a fertilizer supply pipe. The fertilizer supply pipe is equipped with a screw that stirs and moves the fertilizer. However, since the fertilizer supplying section has a structure including a rotating screw, the fertilizer spreader becomes large, and the above problem is not solved. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-55892 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above problems, the present invention aims to provide a small fertilizer spreader for a walk-behind tiller that can spread fertilizer using vibrations generated by the tiller, without using rotary drive or other power sources such as electricity. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides a fertilizer spreader mounted on a self-propelled walk-behind cultivator equipped with a rotary tilling unit, the fertilizer spreader comprising: a fertilizer tank for storing fertilizer; a spread amount control unit for controlling the amount of fertilizer spread; and a fertilizer spreader hose for spreading the fertilizer. For fixing to walk-behind cultivators Fixing arm and ,of Preparation, The lower part of the fertilizer tank is connected to the spray amount control unit, one end of the fertilizer spray hose is attached to the lower part of the spray amount control unit, the spray amount control unit is fixed to a wheel support part of the walk-behind cultivator via a fixing arm, and the fertilizer in the fertilizer tank is sent to the spray amount control unit by vibrations transmitted to the fixing arm via the wheel support part, and is sprayed from the fertilizer spray port through the fertilizer spray hose. The fertilizer spraying port of the fertilizer spraying hose is arranged in front of the rotary cultivating unit of the walk-behind cultivator.

[0008] The present invention also employs a means in which the spray amount control section includes an adjustment plate that adjusts the amount of fertilizer sprayed, and a shutter plate that starts or stops fertilizer spraying.

[0009] Furthermore, the present invention employs a means for providing a shutter opening / closing lever for operating the shutter plate.

[0010] Furthermore, the present invention employs a means in which the spray amount control section includes a resonator that resonates at a natural frequency.

[0011] Furthermore, the present invention provides a self-propelled walk-behind cultivator equipped with a rotary tillage section on which the fertilizer spreader is mounted, which comprises a cultivator body and a fertilizer spreader attached to a wheel support section of the cultivator body, and the fertilizer spreader outlet of the fertilizer spreader hose is positioned in front of the rotary tillage section.

[0012] Furthermore, the present invention employs a means in which the spread rate control unit of the fertilizer spreader is fixed to the wheel support portion via a fixing arm. Furthermore, the present invention employs a means in which the wheel support section is a rectangular pillar, and the upper part of the wheel support section is inclined toward the rotary tilling section relative to the lower part. Furthermore, the present invention employs a means in which the fertilizer spreader is disposed in the vicinity of and immediately above the rotary tilling section. Furthermore, the present invention employs a means for adjusting the position of the fertilizer spreader in the vertical direction relative to the wheel support portion.

[0013] Furthermore, the present invention employs a means in which a rotary ON / OFF cable in a walk-behind cultivator is connected to a shutter opening / closing lever in the fertilizer spreader. [Effects of the Invention]

[0014] The walking cultivator and fertilizer spreader of the present invention can spread fertilizer using the vibrations generated by the cultivator, without using rotary drive powered by electricity or other means, and can make the fertilizer spreader it is equipped with smaller and lighter.This makes it possible to stably perform top dressing and soil lifting work simultaneously even when the row spacing is narrow, thereby achieving unprecedented and excellent effects that contribute to improved workability. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an overall perspective view showing an embodiment of a walk-behind cultivator equipped with a fertilizer spreader according to the present invention. [Figure 2] 1 is an overall perspective view showing an embodiment of a fertilizer spreader unit according to the present invention. [Figure 3] 1 is a schematic diagram showing the operation of a walk-behind cultivator and a fertilizer spreader according to the present invention. FIG. [Figure 4] FIG. 4 is an explanatory diagram showing the propagation of vibrations in the walk-behind cultivator according to the present invention. [Figure 5] 4 is an explanatory diagram showing the shutter operation of the fertilizer spreader according to the present invention. FIG. [Figure 6] 4 is an explanatory diagram showing the spray amount adjustment operation of the fertilizer spreader according to the present invention. FIG. [Figure 7] 4 is an explanatory diagram showing the operation of the resonator of the fertilizer spreader according to the present invention. FIG. [Figure 8] FIG. 10 is an overall perspective view showing another embodiment of a walk-behind cultivator equipped with a fertilizer spreader according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] The greatest feature of the fertilizer spreader of the present invention is that it is small and lightweight, and when equipped with a walk-behind cultivator, it can simultaneously perform top dressing and soil lifting, even when the row spacing is narrow. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fertilizer spreader according to the present invention will be described below with reference to the drawings.

[0017] Furthermore, the overall configuration and configuration of each part of the fertilizer spreader and walk-behind cultivator shown below are not limited to the embodiments below, but can be modified as appropriate within the scope of the technical concept of the present invention, i.e., within the range of shapes, dimensions, etc. that can achieve the same functional effects.

[0018] The present invention will be described with reference to FIGS. FIG. 1 is an overall perspective view showing an embodiment of a walk-behind cultivator equipped with a fertilizer spreader according to the present invention. FIG. 2 shows an embodiment of the fertilizer spreader according to the present invention, where (a) is an overall perspective view of the fertilizer spreader and (b) is an overall perspective view of the fertilizer spreader with the lid open. FIG. 3 is a schematic diagram showing the operation of the walk-behind cultivator according to the present invention and the fertilizer spreader equipped with it. FIG. 4 is an explanatory diagram showing the transmission of vibration from the walk-behind cultivator according to the present invention to the fertilizer spreader. FIG. 5 is an explanatory diagram showing the shutter operation of the fertilizer spreader according to the present invention, where (a) shows the shutter in an open state and (b) shows the shutter in a closed state. FIG. 6 is an explanatory diagram showing the application rate adjustment operation of the fertilizer spreader according to the present invention, where (a) shows a case where the adjustment amount is large and (b) shows a case where the adjustment amount is small. FIG. 7 is an explanatory diagram showing the operation of a resonator of the fertilizer spreader according to the present invention, where (a) shows the structure of the resonator and (b) shows an example of using the resonator in a fertilizer spreader. FIG. 8 is an overall perspective view showing another embodiment of a walk-behind cultivator equipped with a fertilizer spreader according to the present invention.

[0019] The walk-behind cultivator 1 is a self-propelled walk-behind cultivator equipped with a fertilizer spreader, and is primarily used to simultaneously perform top dressing and soil lifting in the narrow spaces between rows of crops such as leeks. The walk-behind cultivator 1 is composed of a cultivator main body 70 and a fertilizer spreader 10.

[0020] The cultivator body 70 is used to make vegetable ridges and dig trenches in fields that have been tilled with a tractor or cultivator, and the cultivator in this embodiment is characterized by having wheels 76 at the front for lifting soil between narrow rows of crops such as onions. The main components of the cultivator body 70 include an engine section 71, tires 72, a rotary tilling section 73, a rotary frame 74, a wheel support section 75, wheels 76, a cover 77, a handle 78, and a rotary ON / OFF cable 79 (Figure 1).

[0021] The engine unit 71 is the power source for propelling the cultivator main body 70 and rotating the rotary tilling unit 73. It is generally a gasoline engine, and a transmission is used to adjust the drive and rotation speed of the tires 72 and rotary tilling unit 73. It is the main source of vibration for the cultivator main body 70. The tires 72 are used to propel the cultivator body 70 and to allow the cultivator body 70 to stand on its own. There are two wheels on the left and right, and the distance between the two wheels is short so that the cultivator can pass through narrow spaces between rows. The circumference of the tires 72 is equipped with protrusions to clip onto the soil. The rotary tilling unit 73 is a rotating claw for tilling and lifting the soil. Two are arranged on the left and right. Soil lifting is performed by kicking up the soil. Together with the engine unit 71, it is the main source of vibration for the cultivator body 70.

[0022] The wheels 76 are used to ensure stable movement of the cultivator body 70 when lifting soil between narrow rows of crops such as green onions. They consist of two wheels, and the spacing between the two wheels is narrow to accommodate the narrow row spacing. The wheels 76 are held by wheel support parts 75. The upper part of the wheel support part 75 is inclined toward the rotary tiller part 73 relative to the lower part. In other words, the upper part is inclined on the side opposite to the side where the fertilizer spreader 10 is attached. A rotating part is provided at the upper end of the wheels 76 to adjust the length of the wheels 76, and the operator can change the length to the wheels 76 by turning the rotating part.

[0023] The fertilizer spreader 10 is attached to the wheel support part 75. The wheel support part 75 is pillar-shaped, and the fertilizer spreader 10 is fixed using a fixing arm 60 that has a shape that grips the pillar. The wheel support part 75 is a square pillar. Therefore, when the fertilizer spreader 10 is attached, the attachment direction can be easily stabilized.

[0024] The rotary frame 74 is a structure for holding the wheel support section 75 and the wheels 76. The rotary frame 74 is fixed to the transmission connected to the sturdy engine section 71, and therefore can stably fix the wheel support section 75 and the wheels 76. In addition, because the rotary frame 74 is directly connected to the transmission connected to the engine section 71, it can transmit vibrations from the engine section 71 directly to the fertilizer spreader 10.

[0025] The cover 77 is a part that catches the soil kicked up by the rotary tilling unit 73 and drops the soil in an appropriate location for soil lifting work. It is positioned above the rotary tilling unit 73 so as to cover the rotary tilling unit 73. The length and angle of the cover 77 can be adjusted depending on the height and shape of the soil lifting. The handle 78 controls the direction of travel of the cultivator body 70, etc. The rotary ON / OFF cable 79 controls the start and stop of the rotary tilling section 73 and is connected to a rotary start lever 79 a fixed to the handle 78 .

[0026] The fertilizer spreader 10 is a device that continuously spreads a fixed amount of fertilizer. It is fixed to the wheel support part 75 of the cultivator body 70, is located in front of the cultivator body 70, and spreads fertilizer before lifting the soil. The fertilizer spreader 10 is composed of a fertilizer tank 20, a spread amount control unit 30, a shutter opening / closing operation unit 40, a fertilizer spreader hose 50, and a fixing arm 60.

[0027] The fertilizer tank 20 is a section that stores fertilizer to be spread. The bottom of the fertilizer tank 20 is connected to the spread amount control unit 30. The fertilizer tank 20 is roughly shaped like an inverted quadrangular pyramid, and sends fertilizer toward the spread amount control unit 30 at the bottom (Figs. 1 and 2). It is made of metal, such as stainless steel. There is a lid 21 on the top, and the lid 21 is opened to put fertilizer into the fertilizer tank 20 (Fig. 2). A fertilizer confirmation window 22 is provided on the rear side of the fertilizer tank 20, and the worker can check the amount of fertilizer through the confirmation window even while working (Fig. 2(b)).

[0028] The spray amount control unit 30 is a part that adjusts the spray amount of the fertilizer H flowing from the fertilizer tank 20 and controls the start and stop of spraying by sliding a plate. The entire spray amount control unit 30 is subjected to vibrations from the engine unit 71 and the like, and the vibrations allow the fertilizer to smoothly flow from the fertilizer tank 20 into the spray amount control unit 30. The spray amount control unit 30 is made up of a frame 31, a movable adjustment plate 32, a fixed adjustment plate 33, a spray amount adjustment dial 34, a movable shutter plate 35, a fixed shutter plate 36, and the like.

[0029] The frame 31 is a portion that houses the adjustment plate, the spray amount adjustment dial 34, the shutter plate, etc. The frame 31 also has the function of holding the fertilizer tank 20 from both the left and right sides. In addition, the fixing arms 60 are connected to the frame 31, and the frame 31 also has the function of holding the entire fertilizer spreader 10.

[0030] The adjust plate is a plate for adjusting the amount of fertilizer H to be spread, and is composed of a movable adjust plate 32 and a fixed adjust plate 33. It is located relatively high above the spread amount control unit 30 and supported by a plate support part 38 (Figure 5). The movable adjust plate 32 and the fixed adjust plate 33 are arranged one above the other. The fixed adjust plate 33 is fixed to the plate support part 38, and a hole is provided in the center of the fixed adjust plate 33 through which the fertilizer H passes. The size of the hole is large enough to allow the maximum amount of fertilizer to be spread to pass through. The movable adjust plate 32 has a hole similar to that of the fixed adjust plate 33, with one end bent upward in an L-shape. The movable adjust plate 32 is not fixed and can slide horizontally. By sliding the movable adjust plate 32, the amount of overlap between the hole in the fixed adjust plate 33 and the hole in the movable adjust plate 32 increases or decreases. The amount of fertilizer H that passes through the movable adjustment plate 32 and the fixed adjustment plate 33 can be adjusted by the amount of overlap of the holes.

[0031] The bent end surface of the movable adjustment plate 32 has a screw hole, into which one end of the threaded portion 341 is inserted, and the other end of the threaded portion 341 is connected to the spray rate adjustment dial 34. The threaded portion 341 is held by the frame portion 31 at its middle portion, and the female thread structure of the frame portion 31 and the thread structure of the threaded portion 341 have a relationship. By rotating the spray rate adjustment dial 34, the threaded portion 341 moves horizontally, sliding the movable adjustment plate 32. Therefore, the spray rate of fertilizer H can be adjusted by the spray rate adjustment dial 34.

[0032] The shutter plate is a plate for starting and stopping the spraying of fertilizer H, and is composed of a movable shutter plate 35 and a fixed shutter plate 36. It is positioned relatively below the spray amount control unit 30 and supported by a plate support part 38 (Figure 5). The movable shutter plate 35 and the fixed shutter plate 36 are positioned one above the other. The fixed shutter plate 36 is fixed to the plate support part 38, and a hole through which fertilizer H passes is provided in the center of the fixed shutter plate 36. This hole is large enough to allow the maximum amount of fertilizer to be sprayed to pass through. The movable shutter plate 35 has a hole similar to that of the fixed shutter plate 36, one end of which is connected to a shutter opening / closing shaft 37. The movable shutter plate 35 is not fixed and can slide horizontally. When the movable shutter plate 35 slides and the hole in the movable shutter plate 35 overlaps with the hole in the fixed shutter plate 36, the fertilizer passes through the plate. If the holes in the movable shutter plate 35 and the fixed shutter plate 36 do not overlap, the fertilizer does not pass through and the spraying can be stopped. A spring portion 361 is added to the shutter opening / closing shaft 37 between the movable shutter plate 35 and the frame portion 31. The spring portion 361 biases the movable shutter plate 35 in the sliding direction when the movable shutter plate 35 slides, thereby allowing the movable shutter plate 35 to slide smoothly.

[0033] The shutter opening / closing operation unit 40 is a part for operating the part that starts and stops fertilizer spraying, which is made up of the movable shutter plate 35 and the fixed shutter plate 36. The shutter opening / closing operation unit 40 consists of a cable guide unit 41, a spring unit 42, a shutter opening / closing cable 43, and a shutter opening / closing lever 44. The cable guide portion 41 is a portion that mediates between the shutter opening / closing shaft 37 connected to the movable shutter plate 35 and the shutter opening / closing cable 43. It has a triangular structure and converts left-right movement of the shutter opening / closing shaft 37 into forward / backward movement. The shutter opening / closing cable 43 extends to the handle 78 and is connected to a shutter opening / closing lever 44 fixed to the handle 78. A spring portion 42 is interposed between the cable guide portion 41 and the shutter opening / closing cable 43 as a buffer material. By operating the shutter opening / closing lever 44, the user can easily control the start and stop of fertilizer spraying.

[0034] During fertilizer spreading, the rotary tilling unit 73 must start at the same time as the start of fertilizer spreading. Therefore, a preferred configuration is one in which a rotary ON / OFF cable 79, which controls the start and stop of the rotary tilling unit 73, is connected to the shutter opening / closing lever 44, which controls the start and stop of fertilizer spreading (FIG. 8). In other words, this configuration allows the shutter opening / closing cable 43 and the rotary ON / OFF cable 79 to be operated simultaneously with a single operating lever. Specifically, operating the shutter opening / closing lever 44 opens and closes the movable shutter plate 35 via the shutter opening / closing cable 43, and simultaneously starts and stops the rotary tilling unit 73 via the rotary ON / OFF cable 79. By adopting this configuration, it is possible to start and stop fertilizer spreading and the rotary tilling unit 73 at the same time. According to the above embodiment, the shutter opening / closing lever 44 functions as an operating lever for both the shutter opening / closing cable 43 and the rotary ON / OFF cable 79, so the rotary start lever 79a is not necessary.

[0035] The fertilizer spreading hose 50 is used to guide the fertilizer H to be spread. One end is attached to the bottom of the spread amount control unit 30, and the other end is guided in front of the rotary tilling unit 73, allowing the fertilizer to be spread from the fertilizer spreading port 51.

[0036] The fixing arm 60 is used to fix the fertilizer spreader 10 to the cultivator main body 70 (Figs. 1 and 2). One side of the fixing arm 60 is fixed to the frame 31 of the spray amount control unit 30, and the other side extends rearward. A support portion guide 61 that covers the wheel support portion 75 is provided on the other side. Since the wheel support portion 75 is shaped like a rectangular pillar, the inside of the support portion guide 61 is also shaped like a rectangular pillar that follows that shape. In addition, the support portion guide 61 is provided with a position adjustment screw 62 for fixing and position adjustment, which allows the position of the fertilizer spreader 10 to be adjusted relative to the wheel support portion 75.

[0037] Next, the movement of the walk-behind cultivator 1 will be described with reference to Fig. 3. Fig. 3 is a diagram that schematically shows the movement of the walk-behind cultivator 1 during top dressing work and soil lifting work. The cultivator main body 70 is represented by a handle 78, an engine unit 71, tires 72, a rotary tiller unit 73, a cover 77, a wheel support unit 75, and wheels 76. The fertilizer spreader 10 is fixed to the wheel support unit 75. It works between the furrows to the right of the page. Fertilizer H in the fertilizer tank 20 of the fertilizer spreader 10 is sent to the spread amount control unit 30 by vibrations of the engine unit 71, etc., and then passes through the fertilizer spread hose 50 and is spread from the fertilizer spreader nozzle 51. The fertilizer spreader nozzle 51 is located in front of the rotary tiller unit 73. The ridges U are raised by the rotary tilling unit 73 and controlled by the cover 77, so that they can be made higher than their original height. At that time, the fertilizer H is also raised, so that the fertilizer H is also stirred and can be appropriately mixed into the new ridges U.

[0038] Next, the propagation of vibration will be described with reference to Fig. 4. Fig. 4 shows a part of the rotary frame 74 of the cultivator main body 70 and the fertilizer spreader 10. In the walk-behind tiller 1, the main source of vibration is the engine unit 71. In the tiller main body 70, the rotary frame 74 is directly fixed to the transmission connected to the engine unit 71, and is therefore directly subjected to vibrations from the engine unit 71. Vibrations from the rotary frame 74 are transmitted to the fixing arm 60 via the wheel support unit 75. Vibrations from the fixing arm 60 are transmitted to the spray rate control unit 30. In this way, with this structure, the vibrations from the engine unit 71 can be efficiently transmitted to the fertilizer spreader 10. Therefore, the vibrations cause the fertilizer H in the fertilizer spreader 10 to be appropriately stirred and moved, allowing for a smooth flow of fertilizer to the fertilizer tank 20, the spray rate control unit 30, and the fertilizer spreader hose 50. Furthermore, since the fertilizer spreader 10 is held only by the fixing arm 60, the area around the spread amount control unit 30 vibrates greatly around point A of the fixing arm 60, thereby increasing the movement of the fertilizer H due to the vibration.

[0039] Furthermore, with regard to the propagation of vibrations to the fertilizer spreader 10, not only the engine unit 71 but also the rotary tiller unit 73 can be a vibration source. That is, the rotary tiller unit 73 generates vibrations when it rotates to till or lift the soil, and these vibrations are transmitted appropriately, thereby vibrating the entire fertilizer spreader 10. To maximize this function, it is preferable that the fertilizer spreader 10 be disposed directly above or in the vicinity of the rotary tiller unit 73. By disposing the fertilizer spreader 10 directly above and in the vicinity of the rotary tiller unit 73, vibrations generated in the rotary tiller unit 73 are transmitted directly and efficiently.

[0040] Next, the operation of the plate will be described with reference to Figures 5 and 6. Figures 5 and 6 are schematic cross-sectional views of the fertilizer spreader 10 taken in the left-right direction. The fertilizer H stored in the fertilizer tank 20 flows downward into the spray amount control unit 30 due to gravity, vibration, etc. The spray amount control unit 30 has a movable adjustment plate 32 and a fixed adjustment plate 33 that adjust the spray amount, and a movable shutter plate 35 and a fixed shutter plate 36 that start and stop fertilizer spraying.

[0041] Explain how to start and stop fertilizer spreading. 5(a) shows the state when fertilizer spraying has started. The central holes of the movable shutter plate 35 and the fixed shutter plate 36 overlap, allowing fertilizer H to flow out in the direction of the fertilizer spray hose 50. In terms of movement, the shutter opening / closing cable 43 is pulled by the shutter opening / closing lever 44, and the shutter opening / closing shaft 37 is pulled to the right on the page via the cable guide part 41, and in conjunction with this, the movable shutter plate 35 moves to the right. The spring part 361 is contracted and has a repulsive force.

[0042] 5(b) shows the state when fertilizer spraying is stopped. The central holes of the movable shutter plate 35 and the fixed shutter plate 36 do not overlap, and fertilizer H cannot flow out in the direction of the fertilizer spray hose 50. In terms of movement, the shutter opening / closing cable 43 is loosened by the shutter opening / closing lever 44, and the shutter opening / closing shaft 37 moves leftward on the page via the cable guide part 41, and in conjunction with this, the movable shutter plate 35 moves leftward as well. The spring part 361 uses a repulsive force to assist the movement of the movable shutter plate 35 leftward.

[0043] The adjustment of the amount of fertilizer applied will now be described. 6(a) shows the state in which the amount of fertilizer sprayed is at its maximum. The central holes of the movable adjustment plate 32 and the fixed adjustment plate 33 are completely aligned, allowing the maximum amount of fertilizer H to flow in the direction of the fertilizer spray hose 50. In terms of movement, by rotating the spray rate adjustment dial 34, the linked screw portion 341 moves to the right on the page. The movable adjustment plate 32 connected to the end of the screw portion 341 moves to the right on the page. When the opening is at its largest, the rotation of the spray rate adjustment dial 34 is stopped.

[0044] 6(b) shows the state in which the amount of fertilizer sprayed is limited. The central holes of the movable adjustment plate 32 and the fixed adjustment plate 33 partially overlap, allowing a limited amount of fertilizer H to flow in the direction of the fertilizer spray hose 50. In comparison with (a), by rotating the spray rate adjustment dial 34, the linked screw portion 341 moves leftward on the paper. The movable adjustment plate 32 connected to the end of the screw portion 341 moves leftward on the paper. When the opening reaches a predetermined size, the rotation of the spray rate adjustment dial 34 stops. In this way, by using multiple plates, it is possible to easily start and stop fertilizer spraying and adjust the amount of fertilizer sprayed.

[0045] The greatest feature of this invention is that it spreads fertilizer using vibrations generated by the cultivator, without using rotational drive powered by electricity or other sources.Furthermore, by emphasizing vibrations generated by the cultivator that are suitable for the flow of fertilizer for spreading, it is possible to move the fertilizer more smoothly. For example, if 50 Hz is a vibration frequency suitable for the flow of fertilizer, then by attaching a resonator 80 with a resonance frequency of 50 Hz to the spray amount control unit 30, the vibration frequency suitable for the flow of fertilizer can be emphasized.

[0046] An example of a resonator is shown in Figure 7(a). Resonator 80 has a weight 83 inside its housing, and emphasizes vibrations of a specific frequency by combining springs 82, 84, and a damper 85 to damp the vibrations of weight 83. The upper part of weight 83 is fixed to upper support 81 via spring 82, and the lower part is fixed to lower support 86 via spring 84. Lower support 86 and damper 85 have a predetermined resistance and have the effect of damping the vibrations of weight 83. As shown in Figure 7(b), a resonator 80 is placed on the side of the spray rate control unit 30. Vibrations from the cultivator main body 70 are transmitted from the rotary frame 74 via the wheel support unit 75 to the fixing arm 60 and the spray rate control unit 30. Some of the vibration frequencies are emphasized by the resonator 80, making it possible to obtain vibrations that are more effective in moving fertilizer.

[0047] Thus, according to the present invention, it is possible to spread fertilizer using the vibrations generated by the cultivator, without using rotational drive powered by electricity or other sources, and the fertilizer spreader installed can be made smaller and lighter.As a result, it is possible to stably perform top dressing and soil lifting work simultaneously even when the row spacing is narrow, improving workability. [Industrial Applicability]

[0048] The fertilizer spreader according to the present invention can be mounted not only on a self-propelled walk-behind cultivator but also on any other agricultural machinery. Therefore, it is believed that the present invention has great industrial applicability. [Explanation of symbols]

[0049] 1. Walk-behind cultivator 10 Fertilizer spreader 20 Fertilizer Tank 21 Lid 22 Fertilizer check window 30 Spray amount control unit 31 Frame 32 Movable adjustment plate 33 Fixed adjustment plate 34 Spray rate adjustment dial 341 Threaded part 35 Movable shutter plate 36 Fixed shutter plate 361 Spring part 37 Shutter opening and closing shaft 38 Plate support 40 Shutter opening / closing operation section 41 Cable guide 42 Spring part 43 Shutter opening / closing cable 44 Shutter opening / closing lever 50 Fertilizer Spreading Hose 51 Fertilizer spray port 60 Fixing arm 61 Support guide 62 Position adjustment screw 70 Management machine body 71 Engine section 72 tires 73 Rotary tillage section 74 Rotary Frame 75 Wheel support part 76 Wheels 77 Cover 78 Handle 79 Rotary ON / OFF cable 79a Rotary starting lever 80 resonator 81 Upper support part 82 Spring part 83 Weight part 84 Spring part 85 Damper section 86 Lower support part U ridge H Fertilizer

Claims

1. A fertilizer spreader mounted on a self-propelled walking-type cultivator equipped with a rotary tilling unit, The cultivator includes a fertilizer tank for storing fertilizer, a spray amount control unit for controlling the amount of fertilizer sprayed, a fertilizer spray hose for spraying the fertilizer, and a fixing arm for fixing to the walk-behind cultivator, The bottom of the fertilizer tank is connected to the spray amount control unit. One end of the fertilizer spray hose is attached to the bottom of the spray amount control unit, The spray amount control unit is fixed to the wheel support unit of the walk-behind cultivator via a fixing arm, The vibration transmitted to the fixing arm via the wheel support part sends the fertilizer in the fertilizer tank to the spray amount control part, and then the fertilizer is sprayed from the fertilizer spray nozzle through the fertilizer spray hose. A fertilizer spreader characterized in that the fertilizer spreader outlet of the fertilizer spreader hose is positioned in front of the rotary tiller unit of the walk-behind cultivator.

2. 2. The fertilizer spreader according to claim 1, wherein the spread amount control unit has an adjustment plate that adjusts the amount of fertilizer spread, and a shutter plate that starts or stops fertilizer spread.

3. 3. The fertilizer spreader according to claim 2, further comprising a shutter opening / closing lever for operating the shutter plate.

4. 4. The fertilizer spreader according to claim 1, wherein the application rate control unit includes a resonator that resonates at a natural frequency.

5. A self-propelled walking-type cultivator equipped with a rotary tilling unit equipped with the fertilizer spreader according to any one of claims 1 to 4, The cultivator comprises a cultivator body and a fertilizer spreader attached to a wheel support part of the cultivator body, The spray amount control unit in the fertilizer spreader is fixed to the wheel support part via a fixing arm, The walk-behind cultivator is characterized in that the fertilizer spraying port of the fertilizer spraying hose is arranged in front of the rotary tilling unit.

6. 6. The walk-behind cultivator according to claim 5, wherein the wheel support portion is a rectangular pillar, and the upper portion of the wheel support portion is inclined toward the rotary cultivating portion relative to the lower portion.

7. 7. The walk-behind cultivator according to claim 5, wherein the fertilizer spreader is disposed in the vicinity of and immediately above the rotary tilling unit.

8. 8. The walk-behind cultivator according to claim 5, wherein the position of the fertilizer spreader is adjustable in the vertical direction relative to the wheel support portion.

9. 9. The walk-behind cultivator according to claim 5, wherein a rotary ON / OFF cable of the walk-behind cultivator is connected to a shutter opening / closing lever of the fertilizer spreader.

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