JP2003061429A - Application nozzle structure for tilling unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an application nozzle structure for a tilling unit, capable of preventing the application nozzles, structural members for supporting the nozzles, etc., from being damaged or deformed, when the application nozzles are mounted on the rear of the tilling unit and used in supplying the tilled soil with materials, such as fertilizer, and capable of smoothly conducting application operation by reducing resistance caused by traveling of the nozzles through the tilled soil. SOLUTION: This application nozzle structure for the tilling unit comprises positioning the application nozzles 50 on applicators 5 which supply the tilled soil with materials, such as the fertilizer, at the rear of the tilling unit 3, wherein the application nozzles 50 are mounted and supported on the rear of the tilling unit 3 through a damper support structure 7 attached to the rear of the tilling unit 3, so that the nozzles are vertically movable according to the resistance caused by traveling of the nozzles through the tilled soil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an application nozzle structure of a tilling device for supplying materials such as fertilizer to cultivated soil.

[0002]

2. Description of the Related Art Conventionally, a ridger and a fertilizer application nozzle are provided at the rear of a tiller mounted on a tractor to form cultivated cultivated soil into a ridge and supply fertilizer into the ridge. Fertilizer application devices are already known as disclosed in Japanese Patent Laid-Open No. 2001-61319.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention A ridge standing fertilizer application apparatus having a structure as described in the above publication is used to apply fertilizer to cultivated soil cultivated by a tilling device in a ridge after a ridger has completed ridge forming. Since fertilizer is applied with the application nozzle of the device inserted,
There is a drawback that the applied nozzle collapses the molded ridge, and the application nozzle is provided by extending the pipe from the tiller side at the position behind the rotary part of the tiller and separated by the rear cover and the grounding wheel. Is an unstable support structure, and when applied to a resistance object such as a large stone or a lump of soil mixed in the soil, the application nozzle is likely to be deformed or damaged. There is a problem that the support structure is complicated and the cost is high.

[0004]

In order to solve the above-mentioned problems, the application nozzle structure of the tilling device according to the present invention is an application device 5 for supplying a material such as fertilizer to the cultivated soil at the rear part of the tilling device 3. The application nozzle 50 is characterized in that the application nozzle 50 is attached and supported so as to be movable up and down by the resistance of the cultivated soil through the buffer support structure 7 installed at the rear part of the tiller 3.

Secondly, the application nozzle 50 is bent and formed in an inverted V shape, and the mounting seat 5 is provided inside the bend of the application nozzle 50.
3 is integrally joined, and the mounting seat 53 is mounted and supported by a support arm 55 which is projected from the cushion support structure 7 side to the front side.

[0006]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 is a tractor having a three-point link type lifting mechanism 10 at the rear of the traveling machine body 1b having wheels 1a at the front and rear. The hitch portion 11 formed at the rear of the lifting mechanism 10 has a working machine 1c according to the present invention. Is detachably attached. The lift mechanism 10 is similar to the conventional lift mechanism, and includes a lift arm 12 that is vertically rotated by a hydraulic lift cylinder (not shown), and left and right lower links 13 that are connected to the lift arm 12 and vertically rotate. The hitch portion 11 is formed as a closed frame so as to positionally connect the top link 14 and the left and right lower links 13 to each other. The hook support portion 15 and the locking support portion 16 having an engaging / disengaging mechanism for attaching a tilling device, which will be described later with reference to FIG.
The c can be attached and detached in a one-touch manner.

The working machine 1c of the present embodiment has a rotary type tiller 3 having a mounting portion for the hitch portion 11 and a tool bar 31 extending rearward from the tiller frame 30. On the other hand, the ridger device 4a configured to be detachably attached and fixed, and the fertilizer application device (applying device) for supplying and fertilizing (applying) paste-like fertilizer as a material to be supplied and applied into the cultivated soil. It is composed of 5 mag. Further, the fertilizer application device 5 includes a plurality of application nozzles 50 provided in the ridger 4a, a material tank 51 placed on the cultivating device 3 to store fertilizer, and a fertilizer in the material tank 51 through a pipeline. It is composed of an application pump section 52 which feeds to the application nozzle 50 side via 50a.

The configuration of each part will be described in detail below. First, the cultivating device 3 will be described with reference to FIGS. 1 to 7. In the cultivating device 3, a plurality of cultivating claws 32a are planted by a transmission case 30a and a supporting frame 30b that are hung at both ends of a cylindrical cultivator frame 30. A rotary portion 3a that rotatably supports both sides of the rotor shaft 32 that is rotatably driven, a rotary cover 33 that is provided above the rotary portion 3a, and a horizontal support shaft 33a at the rear end edge of the rotary cover 33. The surface of the cultivated soil cultivated by the rotary portion 3a is constituted by the rear cover 34 that is rotatably provided and is provided so as to be linked to the application control mechanism 6 of the fertilizer application device 5 described later. Is urged by the rear cover 34 so that it can move up and down, and the unevenness on the surface of the cultivated soil is leveled to form a substantially flat surface.

At the center of the cultivator frame 30, the input shaft 3 is input and transmitted by the PTO shaft from the traveling machine body 1b side.
0c, and the transmission case 3 from the input shaft 30c
0a is provided with a tilling part case 35 for driving the rotary part 3a, and an engaging pin 36a for engaging with the hook support part 15 formed in the hitch part 11 is provided at the upper part of the tilling part case 35. The standing top mast 36 is erected.

On both sides of the top mast 36 and on the front side of the cultivator frame 30, there are provided locking pins 36b which are removably locked to the locking support portions 16 of the hitch portion 11. The top mast 36 has the toolbar 3 on the base side thereof.
The base side of 1 is rotatably supported, and a tool bar up-and-down adjusting mechanism 37 including a screw rod with a handle is provided on the upper rear side of the top mast 36, and the lower end of the screw rod is connected to the middle portion of the toolbar 31. By pivotally supporting, the working portion such as the ridge device 4a and the application nozzle 50 attached thereto is supported via the tool bar 31 so that the vertical height can be adjusted.

The smoothing mechanism 6a has mounting brackets 33b projecting from both sides of the upper portion of the rotary cover 33.
And the respective middle portions of the rear cover 34 are urged downward by the connecting rod 6b and the tension spring 6c so that the cultivated soil behind the rotary portion 3a can be smoothly slid on the curved inner side surface of the rear cover 34. It is formed so as to have a flat surface.

Next, the ridge device 4a will be described with reference to FIGS. 1 to 4 and 9. The ridge device 4a in the illustrated example is a horizontal toolbar 3 that is provided horizontally at the rear end of the toolbar 31.
8, a plurality of (four in the illustrated example) ridge risers 4 are detachably attached and supported via a buffer support structure 7 having a configuration to be described later, thereby providing a rotary portion 3a. In the cultivated soil width, the three ridges are formed while forming four ridges, and the two application nozzles 50 are provided in the middle of each ridge by the configuration described later. Fertilization of soil for a minute is performed at a predetermined depth at the same time.

That is, the buffer support structure 7 is shown in FIG.
As shown in FIG.
Fixed horizontal rod 71 that is detachably attached via 0, and parallel link support structures 72 formed on both sides of the fixed horizontal rod 71.
And a movable horizontal rod 73 biased and supported by the parallel link support structure 72 so as to be vertically swingable. The movable horizontal rod 73 is provided with two ridges provided on both sides thereof with the ridge standing device 4 having the ridge forming plate 40 only on one inner side, and between which the ridge forming plate 40 is provided in a pair of left and right in an expanded manner. Stand 4
Are installed at a predetermined interval, and the application nozzles 50 are installed at the center of each ridger 4 by the configuration described later. A side cover 45 is provided on both outsides of the rear cover 34 and the ridger 4a to prevent the cultivated soil from scattering between them.
Is attached to and supported by the movable horizontal rod 73 side of the ridger device 4a, and a ridge plate 46 for pressing and molding the upper surface of the ridges to be formed between the ridgers 4 is attached and detached. I am trying to install it as much as possible.

As shown in FIG. 9, the parallel link support structure 72 of the buffer support structure 7 has a fixed horizontal rod 71 and a movable horizontal rod 7.
The movable horizontal rod 73 can be vertically swung in a substantially parallel manner with the fixed horizontal rod 71 side as a fulcrum, by connecting and supporting 3 and the upper and lower link rods 75 so as to form a parallel link. Between the fixed horizontal rod 71 side and the movable horizontal rod 73 side, the rod 76a for restricting the lowering lower limit position due to its own weight on the movable horizontal rod 73 side, and the buffer biasing for biasing the movable horizontal rod 73 side to the lower side. The buffer rod mechanism 76, which is composed of a spring 76b for the vehicle, is interposed.

The ridger 4 is provided with a ridge forming plate 40.
The mounting arm bracket 41 provided so as to also serve as the reinforcing frame structure from the side is attached to the movable horizontal rod 73 so as to be attachable to and detachable from the movable horizontal rod 73 and the lateral mounting position can be adjusted. By providing the wheel 42 for supporting the ground on the rear part so as to be substantially the same ground surface as the bottom surface of the ridge forming plate 40, the weight of this working part is stably grounded and supported, and the unevenness of the cultivating surface of the cultivated soil is achieved. The ridge and the fertilizing work can be smoothly performed according to the shape of the above.
Further, the fixed horizontal rod 71 provided with the parallel link support structure 72 of the illustrated example has a support angle adjustment mechanism 79 including a screw rod with a handle and the like provided on the horizontal toolbar 38 for supporting the ridger 4 in a side view. Is adjustable and supported.

On the other hand, as shown in the figure, the application nozzle 50 is formed by bending a tubular body made of a wear-resistant member such as metal into a smooth curved shape which is an inverted V shape in the side view. The upper end side of the fertilizer application device 5 is detachably connected to the pipe line 50a, and the lower end side of the fertilizer application device 5 is extended substantially horizontally so that a discharge port 50b of the application nozzle 50 opens rearward. The position of the discharge port 50b of the application nozzle 50 is at the midpoint height of the ridge forming plate 40 and toward the front side of the midway portion in the length direction by the following mounting structure, as shown in FIGS. It is possible to apply fertilizer to the inside of the ridge in the middle of molding at the initial stage of the ridge forming operation by the ridge standing device 4.

According to this, unlike the conventional one, the application nozzle 50 does not infiltrate into the firmly tightened ridges after molding to perform fertilization, and performs fertilization while facing the unformed ridges in advance. It is possible to support the application nozzle 50 with a stable and simple structure without applying an excessive load to the application nozzle 50, and to apply the fertilizer smoothly to an appropriate depth position near the ridge surface at the approximate central portion of the ridge width. It has features such as improved effects and good cultivation of crops.

The mounting structure of the application nozzle 50 is as follows.
While the mounting seat 53 formed of a thick-walled plate-shaped body having a substantially same shape as the inner shape of the curved application nozzle 50 is internally fitted, the upper part, the front part, and the lower part are integrally joined and attached, and The upper side of the mounting seat 53 is detachably attached and fixed by a mounting screw 56 to the tip of a support arm 55 that is projected forward from the side of the movable horizontal rod 73. The supporting arm 55 has its base side attached to the movable horizontal rod 73 so that the supporting arm 55 can be attached and detached and its lateral mounting position can be adjusted in the same manner as the mounting arm bracket 41 of the ridger 4.

The support arm 55 of this embodiment is provided with mounting seats 55a on both sides of the tip end portion thereof for adjusting the fertilization interval, and the pair of left and right application nozzles 50 are provided on the mounting seats 55a on both sides. There is an advantage that the fertilizer can be easily applied to proper positions on both sides of the plant to be planted in the ridge, while the fertilizers are arranged so as to be stably juxtaposed with each other.

As described above, the application nozzle 50 supported from the side of the movable horizontal rod 73 provided with the ridger 4 via the support arm 55 and the mounting seat 53 has the front side portion thereof as the cultivator 5 and the ridger. Since the application nozzle 50 can be stably supported while being installed as close to the rear cover 34 as possible without hindering the swinging rotation of the rear cover 34 in the space formed between the four. The working machine 1c in which the cultivating device 4, the ridger 4a, and the application nozzle 50 are brought close to each other can be cohesively and compactly configured. Further, there is a feature that a series of operations such as tilling, furrowing, and fertilization can be smoothly performed while the center of gravity of the working machine 1c is brought close to the traveling machine body 1b side.

Further, the application nozzle 50 has a long inclined pipe portion 50c having a gentle receding angle from the upper portion where the bent front portion is brought as close as possible to the rear cover 34 side to the discharge port 50b side. Therefore, it is possible to greatly reduce the resistance when the application nozzle 50 travels through the cultivated soil, and at the same time, the application nozzle 50 mixes the cultivated soil with the hard and large clods, stones, or wood chips. Even if you come in contact with foreign objects (hereinafter referred to as resistance objects),
The inclined pipe portion 50b enables to smoothly overcome this.

Further, at this time, since the application nozzle 50 is configured so that the mounting seat 53 of the supporting structure thereof is also used as the reinforcing member and the application nozzle 50 has a rigid structure, a large load that abuts against the resistance object. When the application nozzle 50 is applied from the lower side to the upper side, the application nozzle 50 can be prevented from being deformed, and the application nozzle 50 can absorb this load.
Since the parallel link support structure 72 is used to quickly retract and move upward against the urging force of the buffer rod mechanism 76, damage and deformation of the application nozzle 50 and its support structure members can be performed easily and accurately. It has the advantage that it can be prevented.

When the above-mentioned load is released, the application nozzle 50 quickly returns to its original position by its own weight of this part and the urging force of the buffer rod mechanism 76. Even on the surface of the cultivator with which the ridger 4 is in contact, both can be smoothly followed and driven.
Further, when the working machine 1c is abruptly lowered from the raised position and grounded as shown in FIG.
With respect to the resistance received by the ridger 4 and the application nozzle 50, both have the advantage that the grounding impact can be buffered and alleviated by the support structure as described above. Also, the application nozzle 5
Since 0 is reinforced by the mounting seat 53, there is also an advantage that it is possible to adopt an inexpensive small-diameter pipe that can be easily bent without reducing the rigidity of the pipe, and to reduce soil resistance. .

Next, the structure of the fertilizer application device 5 will be described. The fertilizer applicator 5 includes a pair of left and right material tanks 51 of the same shape, and a mounting base 51a at a position that is substantially equidistant from the top mast 36 in the middle of both sides of the tiller frame 30 formed of a large diameter pipe. It is placed so that it can be attached and removed in a well-balanced manner. Further, the application pump part 52 is installed close to the left side of the top mast 36, and is adapted to be input from the tillage part case 35 through the pump drive case (transmission clutch transmission mechanism) 8. From the both sides on the transmission lower side. By driving the application pump section 52 installed in the lower part of the material tank 51 by the projecting transmission shaft 80, the fertilizer in the material tank 51 is fed out and three pipelines are provided in the left and right application pump sections 52. 50a through 50a
From the application nozzle 50 connected to the end of a, soil fertilization is performed in the above-described manner. In addition, each of the pipelines 50a is provided with a fertilizer stop switching valve 50d which is provided in the middle thereof so that the discharge stop of the fertilizer application can be freely selected, and the fertilizer stop switching valve 50d for preventing the drooling of the fertilizer is interposed. Are collectively attached to and supported by the horizontal toolbar 38.

Since the three support arms 55 attached to the movable horizontal rod 73 have a pair of left and right application nozzles 50 attached to both sides thereof, one of them is attached to each support arm 55. The application nozzle 50 of No. 1 is connected to the application pump unit 52 of the left material tank 51, and the other application nozzle 50 is connected to the application pump unit 52 of the right material tank 51, whereby the delivery performance is delicate. The fertilizers applied to the three ridges that are discharged and supplied from the application pumps 52 of the left and right material tanks 51, which are different from each other, are substantially evenly supplied and applied. By the above piping structure, the left and right material tanks 51 can be individually accommodated in different materials, for example, by using a combination of normal fertilizer and slow-acting fertilizer or general fertilizer and disinfectant, which are different. There is an advantage that both materials that work can be simultaneously supplied to each ridge in equal amounts.

Next, the transmission structure of the fertilizer application device 5, the application control mechanism 6 and the like will be described with reference to FIGS. As shown in FIG. 6, the transmission structure of the fertilizer application device 5 is such that the input shaft 81 of the pump drive case 8 is input from the input shaft 30c projecting rearward from the tillage case 35 through the chain transmission mechanism 82. The clutch engagement / disengagement operation of the left and right transmission shafts 80 driven by the application pump unit 52 is shown in FIG.
The clutch switch 60, which is shown on the clutch control circuit of FIG. 1 and is disposed on the control side of the traveling machine body 1b, and the rear cover switch 61 of the application control mechanism 6 are connected to ON and OFF, and fixed to the pump drive case 8 side. The clutch motor 6M is operated by operating the forward / reverse rotation and stopping. Further, as shown in FIG. 6, the operating piece 6H provided on the rotary shaft of the clutch motor 6M pushes and pulls the clutch arm 85 of the clutch shaft 83 that connects and disconnects the speed change clutch mechanism in the pump drive case 8 by the connecting rod 62. Are linked together.

As shown in FIGS. 5 and 7, the application control mechanism 6 includes a sensor arm 64 of a sensor shaft 63 pivotally supported in a mounting bracket 33b of the rotary cover 33 and a middle portion of the rear cover 34. And 6 are connected by a connecting rod 65 whose length is adjustable, and are turned on and off by the contact operation of the sensor arm 64.
The rear cover switch 61 having 1a is attached to the side portion of the mounting bracket 33b. Further, a limit switch 66 on the clutch entrance side and a limit switch 67 on the clutch disengagement side are provided at the upper and lower positions on the front side of the clutch motor 6M, and the clutch engagement is effected by a predetermined rotation operation of an actuation piece 6L protruding from the motor shaft. Side limit switch 66 and clutch disengagement side limit switch 67 are individually turned on and off. With this, as the clutch motor 6M rotates forward and backward, the operating piece 6H, the connecting rod 62, and the clutch arm 85 are connected. The clutch engagement / disengagement position at which the clutch shaft 83 is pushed / pulled is defined via the.

Further, 68 in the circuit shown in FIG. 8 is a clutch relay 68 which is associated with the operation of the clutch switch 60, the rear cover switch 61 and the limit switches 66 and 67, and the clutch relay 68 is one relay 68a. Is turned on, the clutch motor 6M is rotated normally, and when the other relay 68b is turned on, the clutch motor 6M is rotated reversely. Reference numeral 69 is a monitor lamp that displays the operating status of the fertilizer application device 5.

Therefore, the fertilizer applicator 5 having the above-described structure is operated in a state in which the working machine 1c descends and is grounded through the elevating mechanism 10 and the rotary portion 3a of the tiller 3 is rotationally driven through the input shaft 30c. When the clutch switch 60 is turned on, the clutch motor 6M rotates forward through the limit switch 66 and the clutch relay 68,
After the clutch shaft 83 is entered and operated, the operating piece 6L
Applies the limit switch 66 to stop the clutch motor 6M to drive the application pump unit 52 via the transmission structure, and perform fertilization work (applying work) in the fertilization mode.

At this time, the rear cover 34 is placed on the surface of the cultivated soil cultivated by the rotary portion 3a in a dotted line of FIG.
As shown by the solid line, the unevenness of the cultivated soil surface is flattened by moving it up and down through the flattening mechanism 6a to finish it into a substantially flat shape. For example, when the tiller 3 is raised or a ridge is formed. When the rear cover 34 is rotated from the cultivated soil in a direction away from the cultivated soil and is in a hanging posture as shown by a solid line due to the fact that the sensor arm 64 is not provided, as shown by a dotted line in FIG.
However, since it is pulled by the connecting rod 65 and rotated downward to contact the touch piece 61a, the rear cover switch 61 is turned off, the clutch motor 6M is immediately reversely rotated by the control circuit, and the fertilizer application device 5 is stopped. Automatically prevent wasteful application and leakage of fertilizer in a non-working state or the like accompanying the rise of the working machine 1c.

Further, when the working machine 1c is lowered from this non-working state and the contact between the sensor arm 64 and the touch piece 61a is released, the clutch motor 6M is normally rotated to drive the fertilizer application device 5 again. The fertilizer is ready for fertilization,
After confirming the ridge formation by the ridge erector 4 and that the application nozzle 50 has entered the ridge, the operator starts fertilization work, whereby the cultivated soil outside the ridge is not formed. On the other hand, it is possible to prevent problems caused by wastefully discharging and exposing fertilizer. Therefore, the fertilizer application device 5 connected to the rear cover 34 via the application control mechanism 6
Has a feature that application work such as fertilization can be performed efficiently while saving supply materials. In this embodiment, the tilling device 3 is also capable of controlling the tilling depth, and the tilling depth detecting sensor 6S of the tilling depth controlling device (not shown) is provided at the shaft end of the sensor shaft 63 of the application control mechanism 6 shown in FIG. By attaching, the constituent members of this part are made to function as both of the above control devices, and the cost is reduced.

Next, a detailed installation structure of the fertilizer applicator 5 installed on the tiller 3 of the working machine 1c and its features will be described. As shown in FIGS. 1 to 4 and 6, the above-described left and right material tanks 51 are provided on the rotary cover 33 for mounting and supporting the cultivator frame 30 on both sides of the top mast 36 in plan view. There is a predetermined foot riding distance that allows an operator to step on and ride outside the projecting object such as the tool bar 31 and the mounting bracket 33b of the smoothing mechanism 6a and from the outer end of the rotary cover 33. The mounting pedestal 51a, which is arranged inside the boarding / unloading space formed as described above and on which the material tank 51 is placed and fixed, is fastened by the U-shaped mounting member 57 so as to hold the cultivator frame 30 from below. Thus, the center of gravity of the material tank 51 is stably and easily mounted and supported, and the front portion of the mounting pedestal 51a is reinforced and connected to the tillage case 35 or the rotary cover 33 side. It is.

Further, the material tank 51 is provided with a lid 56 which closes the supply port so as to be openable and closable near the rear portion thereof, so that the lid 56 of the material tank 51 which is in the forward tilted posture when the working machine 1c is fully raised. It is designed to prevent liquid leakage from. At this time, since the pump drive case 8 that drives the application pump parts 52 of the left and right material tanks 51 is attached and fixed close to the side of the top mast 36 which is near the center of gravity of the tilling device part, both of them are fixed. The chain transmission mechanism 82 having a simple structure enables compact and efficient transmission from the open space formed in the rear portion. The left and right material tanks 51 are so arranged that their mounting positions can be adjusted and set so that the center of gravity of the entire tilling device coincides with the position of the top mast 36.

The tractor working machine 1 configured as described above
The c is for mounting the cultivating device 3 on the lifting mechanism 10 of the tractor 1 via the top mast 36, and from the material tank 51 containing materials such as fertilizer to the rotary unit 3a via the application pump unit 52 and the pipe line 50a. The application nozzle 50 installed in the rear part is provided with the application device 5 for supplying the material to the cultivated soil, and the material tanks 51 are arranged on both sides of the top mast 36 on the rotary cover 33 of the tiller 3. By installing the pump drive case 8 for driving the application pump portion 52 of the material tank 51 close to the top mast 36, the material tank 51 having a high height is arranged on both sides of the rotary cover 33, Since the rear part of the control part is made as wide as possible without making a visual field obstruction present, the field of view from the control part 13 side is made good and the operator Without taking physical posture, it is possible to satisfactorily view the tilling state and Seritsu working conditions and fertilizing working state, it is possible to perform efficiently smoothly while preventing troubles a series of operations.

In addition, when the fertilizer replenishing work is carried out in the above work, in the state where the working machine 1c tilling device 3 is descended and grounded, in the boarding / alighting space part formed on the rotary cover 33 outside the material tank 51. Since it is possible to easily get on and off, the worker can perform the fertilizer replenishment work which is performed by opening and closing the lid 56 and lifting the replenishment tank (not shown) efficiently and easily in a stable posture. This also allows
It has the feature that it can accurately prevent material loss such as liquid spillage and liquid dripping during replenishment work.

Therefore, in the working machine 1c mounted on the tractor configured as described above, the material tank 51 having a heavy structure, the pump drive case 8 and the like can be installed in the cultivating device 3 in a well-balanced manner, After the plowing work is performed stably and the cultivated soil is leveled by the rear cover 34, the pump drive case 8 of the fertilizer application device 5 is driven while accurately forming a plurality of ridges by the ridger 4 of the ridge formation device 4a. The fertilizer in the material tank 51 is applied by the pump unit 5
2 is applied and fertilizer is simultaneously applied from the respective application nozzles 50 to predetermined positions of the ridges, so that a series of operations can be carried out smoothly, and the ridges formed into the predetermined shape and to which the fertilizer has been applied are seeded or It is possible to satisfactorily cultivate a crop planted with seedlings. In this embodiment, the paste-like fertilizer is used as the supply material (application material) used for the application device 5, but the present invention is not limited to this, and liquid fertilizers, chemicals,
Alternatively, a material such as a disinfectant or a water retaining gel material may be used as appropriate.

[0037]

Since the present invention is constructed as described above, it has the following effects. (1) In a rear part of a tiller, provided with an application nozzle of an application device that supplies materials such as fertilizer to cultivated soil, via a buffer support structure in which the application nozzle is installed at the rear part of the tiller, By adopting the application nozzle structure of the tilling device that is vertically mounted and supported by the resistance of the cultivated soil,
When the application nozzle comes into contact with a resistance object such as a lump of soil mixed in the cultivated soil, the application nozzle transfers this load to the buffer support structure and promptly retreats upward, so the application nozzle and its support structure members. It is possible to easily and accurately prevent damage and deformation, etc., and to smoothly perform the application work while reducing the resistance when the application nozzle advances in the cultivated soil.

(2) A support arm in which the application nozzle is bent in an inverted V shape and a mounting seat is integrally joined to the inside of the bending of the application nozzle, and the mounting seat is projected from the buffer support structure side to the front side. Since the application nozzle is also used as a reinforcing member, the application nozzle can have a rigid structure with a simple and inexpensive structure, and the application nozzle can be prevented from being deformed.

[Brief description of drawings]

FIG. 1 is a side view showing a working state in which a working machine according to the present invention is mounted on a tractor.

FIG. 2 is a side view showing a state where the working machine of FIG. 1 is raised.

FIG. 3 is a plan view of the work machine.

FIG. 4 is a rear view showing the configurations of the tilling device and the applying device.

FIG. 5 is a side view showing the configuration of an application control mechanism.

FIG. 6 is a side view showing a mounting structure and a transmission structure of the material tank.

FIG. 7 is a plan view showing the configuration of an application control mechanism.

FIG. 8 is a clutch control circuit diagram.

FIG. 9 is a perspective view showing a configuration of an application nozzle and a buffer support structure.

[Explanation of symbols]

1 tractor 1b traveling airframe 3 tillage equipment 3a Rotary section 4 ridger 4a Ridge device 5 Application equipment (fertilizer application) 6 Application control mechanism 7 Buffer support structure 8 Pump drive case (transmission clutch transmission mechanism) 10 Lifting mechanism 33 Rotary cover 34 Rear cover 36 Top Mast 50 application nozzles 50a pipeline 51 material tank 52 Applied pump section 53 mounting seat 55 Supporting arm

Claims (2)

[Claims] 1. The application nozzle (50) of an application device (5) for supplying a material such as fertilizer to cultivated soil at the rear of the tiller (3), wherein the application nozzle (5) is provided.
No. 0) is a nozzle structure for a tilling device, in which the cushioning support structure (7) is provided at the rear part of the tilling device (3) so that it can be vertically moved by the resistance of the cultivated soil. 2. The application nozzle (50) is bent and formed in an inverted V shape, and the mounting seat (53) is integrally joined to the inner side of the bending of the application nozzle (50) to cushion the mounting seat (53). The support arm (5) that is protruded from the support structure (7) side to the front side
The application nozzle structure of the tiller according to claim 1, which is attached to and supported by 5).