JPH11225502A - Sowing composite working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sowing composite working machine capable of correcting a soil heap formed by a leveling work to a low hill-shaped soil heap, so as not to form the depth giving an i11 effect to a growth when water is filled over the field after sowing, and improving so that the soil in the field does not attach on the compacting roller for preventing the compacted state of the surface of the field from breaking by the attached soil. SOLUTION: This sowing composite working machine is provided by being equipped with a mounting part for an upper link and a lower link at the front part of the working machine, mounting part of which is directly or indirectly a soil pounding device, and arranging and mounting a leveling device, a ditch forming device, further a sowing and soil covering device, and a compacting roller 24 at the rear position in the working and traveling direction of the soil pounding device. At the upper link and its mounting part, a free zone capable of freely transferring within a set distance in a plane along the working and traveling direction between the upper link and the working machine, is provided and the composite machine is constituted as at least the leveling device at the rear of the soil pounding device is lifted by a smaller amount than the actual lifting amount by taking the compacting roller as a fulcrum, when the lower link is lifted by a lifting mechanism of a tractor so as to solve the soil heap.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sowing multi-tasking machine, and more particularly, to a sowing work which is intended to more accurately equalize a field and thereby perform a sowing operation in which a uniform harvest is expected. The present invention relates to a sowing compound working machine.

[0002]

2. Description of the Related Art Conventionally, as a field working machine, individual working machines for cultivating a field, crushing soil, leveling work, grooving work for sowing, and fertilizing work regardless of plowing or no-tillage cultivation are conventionally used. A work machine that is more widely known, and a so-called combined work machine that improves efficiency by performing two or more works in association with these works, is also widely known. For example, as a combined work machine in rice cultivation work, prior to the direct sowing work, in order to equalize the field conditions in advance, crushing and tilling work in a shallow position, then leveling, and then fertilizer suitable for sowing There is known a working machine for performing a fertilization operation for applying a seed, and then forming a sowing groove in the sowing for sowing, sowing the soil, covering the soil, and crushing the soil. Specifically, in the place disclosed in Japanese Patent Application Laid-Open No. 9-275714, after the tilling operation by a rotary tilling machine, a leveling is performed by a lower end portion of a crushed soil plate of the working machine. This is a working machine for applying pressure reduction by a rolling roller to form a seeding groove, sowing and covering the soil. As described above, not only those described in the above-mentioned gazettes but also those listed in the above-mentioned gazettes as a conventional example are inevitably enumerated as those performing the agricultural work in a complex manner. Japanese Patent Publication No. 209613, Japanese Utility Model Publication No. 4-49857, and Japanese Utility Model Publication No. 6-20334.

[0003]

By the way, when seeding is performed on a field with this kind of combined sowing machine, after cultivating a relatively shallow position on the surface, leveling work is performed by some means. Progresses to the final point of the field,
In other words, the soil brought by the leveling plate is moved near the headland part necessary for the tractor's circulation, and the soil is collected just before the leveling device, and the hills are higher than the leveling surface of the field. Is formed. More specifically, in this state, as shown in FIG. 14, a hill k is formed which is one step higher than the field center T which is formed evenly. This hill
For this reason, when the field is flooded with water, the surface of the field becomes shallow and deep, and this causes variations in the growth of the seed paddy, and it is not possible to increase the yield in the field by uniform and multiple harvests. The cause of this is that, as the tractor moves, the leveling plate of the working machine hitched by the tractor moves toward the soil on the field surface and moves, so that a soil pool is formed at the end position of one stroke of the work. In the final step of the working machine, a crushing roller is generally used for the purpose of crushing the field after sowing, but depending on the soil quality, the crushing roller may be used on the surface of the field. There was a problem that soil adhered and substantial unevenness was formed on the surface of the suppression roller, and the field surface after sowing became uneven. As described above, in addition to the problem that the ridge cannot be leveled as in the ideal field, in the crushing operation of the field by the crushing roller, the vertical movement of the tractor is the same as the vertical movement of the crushing roller. In addition, there is a problem that the suppression state of the field surface becomes uneven, and in addition, it is impossible to eliminate the fear that topsoil adheres to the suppression roller to form irregularities on the field surface.

Therefore, according to the present invention, a mountain-like soil pool is formed by the leveling work performed prior to the seeding operation, but this is corrected to a slightly hill-like low soil pool, and after the seeding, When water is applied to the field, the depth of the field is not formed so as to adversely affect the growth, and the soil of the field is not attached to the crushing roller during the crushing work after sowing. The purpose of the present invention is to improve the quality of the soil and prevent the surface of the field from being destroyed by the attached soil.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a multi-tasking sowing machine which is mounted on at least a tractor equipped with a three-point link hitch mechanism and a lift mechanism. At the front of the machine, there is an upper link, as well as a lower link attachment part, this attachment part is directly or indirectly in the soil crusher,
At the rearward position in the work progress direction of the soil crushing device, a leveling device, a groove forming device, and a seeding compound work machine in which a seeding covering device and a pressure-reducing roller are arranged and mounted, and the upper link and its mounting portion are: Between the two, there is a free zone that can move freely by a fixed distance within a plane along the work traveling direction, and when the lower link is lifted by the lift mechanism of the tractor, at least the leveling device reduces the pressure. The present invention is characterized in that a construction is adopted in which a rocking motion is performed with a roller serving as a fulcrum and lift is performed by a lift height smaller than the actual lift amount, thereby removing the accumulation. Further, the free zone is formed directly on the working machine so that the hitch portion of the upper link can rotate within a predetermined range in a vertical plane along the working direction, Thus, the configuration can be easily made without forming a long hole through which the hitch pin moves. Furthermore,
The free zone is characterized in that a work machine is formed so that a hitch pin of an auto hitch member to which the upper link is attached can move in a vertical plane along a working direction. As a result, a free zone can be formed even in the automatic hitch type working machine, and the formation of a reservoir can be prevented, which can contribute to the formation of a level field. In addition, the pressure-reducing roller is characterized in that a soil-adhesion preventing band longer than its perimeter is wound. Therefore, during the leveling operation, the soil does not adhere to the surface of the crushing roller due to the field conditions on the surface of the crushing roller, and the soil adhered to the surface of the crushing roller becomes uneven and becomes uneven on the surface of the field. An accurate work close to a perfect leveling work can be performed without forming unevenness.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, FIG. 1 is a side view showing an entire sowing multi-tasking machine. Reference numeral 10 denotes a vertical halo as a soil crushing device that rotates about a vertical axis, and is parallel to the vertical halo 10. The seeding work machine 20 is attached via quadrangular links 21 and 22.

Next, the configuration of each part of the combined sowing machine will be described. First, Vertical Halo is used as a crushing device.
10 is used, and has a feature of suppressing the vertical movement of the soil as compared to a rotary halo rotating on the horizontal axis. This is because a plurality of rotors 11 arranged along the working width direction are used. Adjacent rotors rotate in opposite directions, and each rotor 11 is composed of two rotating claws 11A attached to a disk. This vertical halo is driven by a rotating torque supplied from a TPO shaft of a tractor, and the rotation of an input shaft is once converted into a rotation on a horizontal plane, and then each rotor is rotated via a group of gears. The adjacent rotors rotate in opposite directions to each other.

[0010] The sowing compound work machine shown in FIG. 1 is mounted on a tractor (not shown) by an upper link U and a pair of left and right lower links L forming a three-point link hitch mechanism provided in the tractor. Corresponding to each link, the vertical halo 10 has a hitch pin hole h in the mast 12 and a lower hitch pin 13 at a position below the member corresponding to the mast member. The hitch pin hole h formed in the mast 12 has a shape in which the hitch pin 14 for mounting the upper link U is long in the working direction, and the end of the upper link U is suitable in a plane perpendicular to the working direction. The free zone h is formed by being able to move within a proper range. The movement of the hitch pin 14 for attaching the upper link U is the most important point in the present invention, as will be described later. The movement in the free zone h allows the lift operation of the tractor to be transmitted to the working machine as it is. There is no.

Further, the vertical halo 10 has one upper parallel link 15 forming a parallelogram in a side view,
Each of the two lower parallel links 16 has a pivot pin 15A,
16A is attached to one end of the parallel link 15, 16
The other end of the sowing work machine 20 is attached via pivot pins 15B and 16B. The pivotal pins 15B and 16 of these parallel links are not directly attached to the seeding machine but are attached to the A-type frame 17, and the A-type frame 17 is attached to the seeding machine. 20 is connected to an A-shaped frame for connection provided in 20. This A-type frame 17 is connected to an A-type frame for connection.
The system will be described later in detail.

An end of a rod 18A of a lift cylinder 18 is pivotally connected to the parallel link 15 via a pin 18B.
The seeding work machine 20 can be appropriately lifted independently of the ground calhalo.

A flat plate 19 is attached to the rear side of the vertical halo 10, and the flat plate 19 is provided with an arm 19A for the frame of the vertical halo 10.
The lower end is pressed against the field surface via a pressing rod 19B and a screw 19C for adjusting the length of the pressing rod by screwing.

The seeding machine 20 is connected to the connecting A
A mold frame 21 is provided at a leading position, and links 22 and 23 are provided at an upper position and a lower position of the A-type frame 21 for connection.
Is pivotally connected by pins 22A and 23B,
The other end of each link is a pin 22B, and a compression roller 2
4 is pivotally attached to the rotation shaft 24A. The pin 2
2B is a frame projecting from a horizontal frame 25A connecting and fixing the upper ends of a frame 25 supporting a rotating shaft 24 of a pressure-suppressing roller 24 arranged at the rear end of the seeding work machine 20. 26A.

The seeding machine 20 has a tube-like shape on the surface of the crushing roller 24 disposed at the rearmost position, which is longer than the circumference of the crushing roller 24 to prevent the adhesion of soil. The anti-adhesion sheet 24X is wrapped around the entire width so that the soil of the field and the suppression roller 24 do not come into direct contact with each other. The anti-adhesion sheet 24X is made of a material having excellent releasability, and is deformed by the weight of the soil even if soil adheres to the anti-adhesion sheet 24X every time the pressure-reducing roller 24 rotates. The soil can be dropped on the field. A pair of grooved disks 26, 27 are mounted at a predetermined interval in front of the pressure-suppressing roller 24 by a bearing device 40 arranged along the width direction. A fertilizer tank 28 and a seed tank 29 are mounted on the frame for dropping the fertilizer and seeds in a groove formed by the 27X rotational movement. By changing the interval between the open-groove disks 26X and 27X, a single or double groove is formed. In the case of a single groove, only seeds are supplied, and in the case of two lines, seeds and fertilizer are supplied. Further, the fertilizer used is granular, and the fertilizer tank 28, the seed tank 29
Feeding section 2 having a feeding roller provided at the bottom of
8A and 29A, the liquid can be dropped and supplied into the grooves 26Z and 27Z formed by the grooved disks 26X and 27X via the supply pipes 28B and 29B.

Feeding parts 28A and 29A provided at the lower part of the fertilizer tank 28 and the seed tank 29 are provided with payout rollers.
(Not shown) are interlocked with each other by a cog belt, and the feed roller of the fertilizer tank 28 is connected to a sprocket wheel 31A attached to the shaft 24A of the pressure reducing roller 24. In FIG. 2, the chain 31 is placed in an interlocking relationship, and the rotation of the pressure-suppressing roller 24 serves as a rotation driving source of the roller.

The grooved disks 26 and 27 are not supported shafts having the same axis, but are supported by a bearing device 40 having a C-shaped support shaft 41 whose axes intersect with each other at an angle. (FIGS. 4 and 9). The bearing device 40 includes a support shaft 41 and a bearing 42 for supporting the support shaft 41. The support shaft 41 has a boss 41A at a central portion, and eccentric shafts at both ends thereof as shown in FIGS. 41X and 41Y are formed to protrude. The bearing 42 is supported in a suspended state by a support member 42A extending from the body frame. Further, the eccentric shafts 41X and 41Y projecting on both sides of the boss 41A intersect at an angle with the axis of the boss 41A, and
The axis of 41Y has a C-shape as viewed from the front. Then, the grooved disks 26, 27 are attached to the eccentric shafts 41X, 41Y, and by rotating the boss 41A in the bearing 42, the grooved disks 26, 27 are rotated.
The distance between the two disks at the 27 contact positions can be selected. The position set by the eccentric shafts 41X and 41Y can be fixed by the fixing screw 43 screwed from the outside of the bearing 42 of the boss portion 41A. This pair of disks 26, 27
Is the groove formed by the gap in the ground contact portion, in other words, the gap between the fertilizer groove M and the seed groove S (FIG. 10). Therefore, the distance between the pair of disks 26 and 27 at the ground portion is determined by the degree of eccentricity of the eccentric shafts 41X and 41Y with respect to the boss. In the above description, the diameter of the inner disk 26 of the pair of disks 26, 27 is large and the diameter of the disk 27 for forming seeds is small because of the convenience of forming the fertilizer groove M. In the case of a pair of open-groove disks 26 and 27 formed with the same diameter, depending on the distance between the two disks in the ground portion, the groove may be one groove or two grooves, and the distance between the grooves can be selected. But the depth is the same.

At the rear of the grooved discs 26 and 27, there are a fertilizer groove 26Z and a soil covering plate 32 for covering the seed groove 27Z. , 27, the soil dug up by the disc can be covered with the groove. The soil cover plate 32 is not limited to a plate-shaped one, and can be replaced with a soil cover disk, and is selectively provided depending on the capacity of the working machine, the scale of the target field, and the like. In this case, the arrangement shape of the earth covering disk in plan view is an inverted C shape, the front side in the traveling direction is wide open, and the rear side is closed. When a cover plate is used, it is only necessary to have a function of moving a mountain-shaped ridge formed near a groove formed by each grooved disk onto the groove.

The A-type frame 17 and the connecting A-type frame 21 will be described below. As shown in FIG. 5, the pin 16 of the A-type frame 17 has a cross shaft shape having a function of reinforcing the lower end portion of the frame, and both ends of the pin 16 project outward in the width direction. Has become. Further, a pin receiver 17X for receiving a pin is formed at the vertex position of the A-type frame 17, and its axis is oriented in the front-rear direction. The A-type frame 17 is formed of a square material, and can bear a load from the surface of each material, particularly the outer surface and the front surface.

On the other hand, the connecting A-shaped frame 21 borne by the A-shaped frame 17 is a channel material 21.
A, 21A, each channel material 21
The release surface of A faces inward, and the A-type frame 17
Are accommodated in a space 21X formed by each channel material from the lower side of the connecting A-type frame 21 in a state where the respective surfaces of the A-type frame 17 are in contact with each other. The top of each channel material is assembled in a jointed type, and a pin receiver 21Z through which the connecting pin 21Y is inserted is formed at the top. Further, a reinforcing member 21B is provided at an intermediate position of the channel member 21A to increase rigidity.

In the embodiment of the present invention shown in FIG.
This is an example in which the free zone h in FIG. 1 is movable instead of a long hole. That is, the end of the upper link U of the tractor is pivotally connected to the vertical halo-10.
A short arm 52 is attached to the arm 52, and a regulating arm 53 having a U-shaped recess 53A is provided at the other end of the arm 52. The restricting arm 53 is configured such that the recess 53A can swing about a stopper pin 54 provided on the vertical halo 10, so that the recess 53A is formed.
Both ends of A are stoppers 53B. The space between the stoppers 53B can function as a free zone h.
The arm 52 is a swingable area. In other words, the linear movement of the hitch pin 12 of the upper link U is temporarily converted into a rotational movement, and the rotation is restricted by restricting the rotation range.
The range of the

FIG. 3 shows an embodiment in which an auto hitch type is adopted for facilitating the mounting of the tractor and the working machine. In this embodiment, an upper hitch pin is provided at the front of the vertical halo 10. There are 51, this upper
A lower auto hitch cross shaft 52 is provided directly below the hitch pin 51 in a side view.

The upper hitch pin 51 is fitted in a long hole 54 formed in a member at the front part of the vertical halo 10, and within the range of the long hole 54, along the working direction. You can move. This long hole 54 is free zone h, and the upper hitch pin 51 moves to an appropriate position in accordance with the lift operation of the tractor.

Further, there is an auto hitch member 60 for catching the hitch pins 51 and 52. As shown in FIGS. 11 and 12, the auto hitch member 60 has a lower end of an inverted U-shaped portal member 61. Plates 62, 62 along the vertical plane are provided on both sides of the lower portion, and lower link hitch pins 6 for mounting the lower link L are provided at lower end positions of the plates 62.
3 are provided. At the center of the top of the portal member 61, there is a hook 64 having an open upper surface, and a portion closer to the working machine is a hook portion 64A. An end of the hook 64 on the tractor side projects toward the tractor. The upper link mounting seat 64B is provided.

Further, a hook groove 65 for catching the lower auto hitch cross shaft 52 is formed in the plates 62, 62 with the working machine side opened.
A hook 66 is pivotally connected to the hook groove 65 by a pin 66A so as to keep the lower auto hitch cross shaft 52 housed in the hook groove 65. The hook 66 is rotated. Swinging hook 67 is pivotally connected to the plates 62, 62 by a pin 67A. A toggle spring is attached to the pin 67A, and the pin 67A has a habit of rotating the swing hook 67 counterclockwise in FIG. Thus, the swinging hook 67 is always engaged with the step at the end of the hook 66 so as to close the hook groove 65. The relationship between the swinging hook 67 and the hook 66 is determined by raising or lowering the hitch operating lever 68, and rotating the swinging hook 67 attached to the lower end of the hitch operating lever 68, thereby connecting the hook 66 to the pivot pin 6.
When the hitch pin operating lever 68 is pulled up, for example, the lower auto hitch cross shaft 53 housed in the hook groove 65 can be released from the captured and fixed state in the hook groove 65 when the hitch pin operating lever 68 is pulled up. It has become. In order to rotate the hook 66, when the work implement is not mounted on the tractor, the hitch operating lever 68, which is in the upright state, is pushed down to rotate the hook 66, whereby the swinging hook is rotated as described above. 6
The end of the hook 7 pushes the end of the hook 66 opposite to the hook 66B, so that the opening of the hook 66B can be closed. At the top of the hitch operation lever 68, an operation lever 68A stands up for convenience in actual operation, so that an operator can manually perform an auto hitch operation. 11 and 12, reference numeral 69 denotes a stopper for preventing the hitch operation lever 68 from falling down to the tractor side.

Next, the auto hitch operation will be described. First, the upper link U of the tractor is attached to the upper link mounting seat 64B of the auto hitch member 60 in advance, and the lower link L is attached to the lower link hitch pin 63 so that the auto hitch member 60 is integrated with the tractor. Become And vertical halo-1
The tractor and the vertical halo 10 are mounted by mounting the auto hitch member 60 on the tractor 0. First, the tractor is lifted with the auto hitch member 60 lifted. , The upper hitch pin 51 is hooked from below by the hook portion 64A, and the front portion of the vertical halo 10 is lifted. As a result, the vertical halo 10 supported at one point at the upper end on the front side is rotated about the upper hitch pin 51 by its own weight, and the lower halo hitch is inserted into the hook groove 65 of the auto hitch member 60. A cross shaft 52 is introduced. When this happens,
By depressing the operation lever 68A, the hook 66 is rotated, and the lower hitch cross shaft 52 of the vertical halo 10 is captured by the hook portion 66B.
Thereby, the tractor and the working machine can be integrated in a directly mounted state.

Further, since the vertical halo 10 and the seeding machine 20 connected to the rear portion thereof are connected by the A-type frame, first, in order to release the connected state, first, the tractor of the tractor must be closed. Vertical halo-10 by lift mechanism
And the seeding work machine 20 is lifted, the front part of the seeding machine 20 is lifted by a stand provided separately, the lock pin 21Y is pulled out from the A-type frame, and only the vertical halo 10 is lifted down. As a result, the A-type frame 17 escapes from the space 21X of the A-type frame 21 for connection, thereby releasing the connection between the two. Thereby, the vertical halo-10 and the seeding work machine 20 can be separated and independent. In other words, each can be used for independent work.

Next, the use state of the sowing multi-tasking machine according to the present invention will be described. First, a seeding operation is performed on a field that has been maintained in a level condition. A relatively shallow portion of the surface is plowed by the rotor 11 of the vertical halo 10 to soften the surface of the field once. Then, the surface of the field is leveled by the leveling plate 19 to form a sowing bed. Then, while forming a sowing groove in the formed sowing bed, seeds are supplied from the seed tank 29 to the sowing groove,
From the fertilizer tank 28, granular fertilizer is supplied to the fertilizer groove via supply pipes 28A and 29A, respectively.
The seeds supplied and the fertilizer are covered with a soil covering disk or a soil covering plate 32.

At this time, the leveling plate 19 provided in the vertical halo 10 moves while approaching the surface soil of the field. As shown in FIG. 11, the puddle k is formed by swelling. Since the puddle k is formed along the headland in the field, work is performed along the lengthwise direction of the headland at the final stage of the work, and the puddle is set in order to make the entire surface of the field evenly close. It is necessary to work to eliminate as much as possible. At this time, if the operation is performed in the same state as in the case of the seeding operation without changing the height of the leveling plate 19, only the position of the puddle k is moved, and the puddle k is not eliminated. Will be. Therefore, in performing work on headland in the present invention, cutting the upper portion of the soil reservoir k by increasing the height of the average flat plate 19 only slightly, relatively high low, flat hills k ₁ Fix it.

For this purpose, the leveling plate 19 is raised by using the output of the tractor. However, if the lift mechanism of the tractor is directly transmitted to the leveling plate 19, a delicate height for shaving the upper part of the puddle k is obtained. It is difficult to control. Therefore, the lower link of the tractor is lifted by the output of the lift mechanism in order to lift the leveling plate 19 by a lift operation. At this time, the entire work machine (the vertical halo 10 and the seeding work machine 20 are integrated). Stuff)
A lift state is established with the contact point of the crushing roller 24 located at the end of the entire operation (or the central axis of the crushing roller) as a fulcrum, and the leveling plate 19 is lifted by a height lower than the actual lift height. Will be.

That is, the hitch pin 14 of the upper link U of the tractor can freely move in the direction of work progress within the range of the free zone h. , The lift force acts on the lower link L first. At this time, the hitch pin 14 of the upper link U moves rearward along the free zone h. The moving distance at this time is determined by the lift height. Freezo
The entire work machine is not lifted by the actual lift height in the range where the movement is permitted by the lift h, and when the lift is performed for the amount exceeding the allowable range (free zone), For the first time, the implement is lifted. In this lift, the entire work machine is moved forward with the ground point of the pressure reduction roller 19 as a fulcrum. In other words, the entire working machine becomes a lever rod with the ground point of the pressure-suppressing roller 24 as a fulcrum, and the leveling plate 19 at an intermediate position of the lever is lower than the lift height applied to the lower link L according to the lever ratio. become.

More specifically, in order to perform the lever movement with the ground point of the pressure-suppressing roller as a fulcrum, the foremost part of the working machine is located at the intermediate position of the lever rod as compared with the lift height at the hitch point of the lower link L. The flat plate 19, which has a lower lift height, is placed at a height suitable for shaving the puddle k. When the height to cut the puddle k is not enough,
Perform headland correction work three times. As a result, the puddle k in the headland is slightly higher than the flat part in the central part T of the field, but becomes lower as a whole, and when the field is filled with water, the central part of the field and the headland part Since the height difference is extremely small, the field environment can be made substantially the same.

[0031]

As is apparent from the above description, according to the combined sowing machine of the present invention, the pile of soil, that is, the soil pool, brought by the leveling plate formed at the end position of one operation stroke. If the work machine is lifted on the headland where the puddle is present to eliminate it, the leveling plate will be in a state lower than the actual lift height, and by moving in this state, the puddle can be scraped off, Accordingly, the soil pool formed on the headland can be made flat with a relatively low height, and the field environment can be made uniform. In addition, the free zone is formed directly on the working machine so that the hitch portion of the upper link can move in a vertical plane along the working direction, which is convenient for mounting on a tractor in a direct mounting type. Is good. Further, the free zone is formed so that the hitch portion of the upper link can be rotated within a predetermined range in a vertical plane along the working direction, and thereby the long hole which allows the movement of the hitch pin. Can be configured relatively easily without forming the same.

Further, a free zone can be formed even in an auto-hitch type working machine, and the formation of puddles can be prevented, contributing to the formation of a level field and direct sowing work. Can be. In addition, since the soil suppression roller having a length longer than its perimeter is wound around the crushing roller, the soil of the field may be deposited on the surface of the crushing roller during the leveling operation depending on the field conditions. Adhesion can be reliably suppressed, and there is no possibility that the soil adhering to the surface of the crushing roller becomes uneven and forms irregularities on the field surface during work,
Accurate work close to perfect leveling becomes possible.

[Brief description of the drawings]

FIG. 1 is a side view showing a composite sowing machine of the present invention.

FIG. 2 is a side view of a combined sowing machine showing another embodiment of a free zone portion of the combined sowing machine of the present invention.

FIG. 3 is a side view of a compound sowing machine in which an automatic hitch mechanism is employed in the compound sowing machine of the present invention.

FIG. 4 is a front view of an open-groove disk employed in the composite sowing machine of the present invention.

FIG. 5 is a front view showing an example in which a disc having a different diameter is used as an open-groove disc employed in the composite seeding working machine of the present invention.

FIG. 6 is a partially enlarged front view of FIG. 5;

FIG. 7 is a sectional view taken along line 7-7 in FIG. 6;

FIG. 8 is an exploded explanatory view showing a relationship between an A-type frame and an A-type frame for connection.

FIG. 9 is an exploded explanatory view of a mechanism for adjusting an interval in a working state of the grooved disk.

FIG. 10 is a front view when the diameters of the grooved disks are different from each other.

FIG. 11 is a front view of the auto hitch member.

FIG. 12 is a side view of the auto hitch member.

FIG. 13 is an explanatory cross-sectional view of a field in a state where soil pools are corrected.

FIG. 14 is an explanatory sectional view of a field in a state where a puddle is formed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vertical halo 11 Rotor 12 Mast 13 Lower hitch pin 14 Hitch pin 15 Upper parallel link 16 Lower parallel link 15A, 16A Pivot pin 15B, 16B Pivot pin 17 A type frame 18 Lift cylinder 18A Rod 18B pin 19 Leveling plate 19A Arm 19B Push rod 19C Thread 20 Seeding machine 21 A-type frame 21A Channel 21B Reinforcement 21Y Lock pin 21Z Pin receiver 22, 23 Link 24 Packing roller 24X Anti-adhesion sheet 25 Frame -Frame 25A Horizontal frame 26X, 27X Open groove disk 26Z, 27Z groove 26A Frame 26B Shaft 28 Fertilizer tank 29 Seed tank 28A, 29A Feeding part 31 Chain 31A Sprocket wheel 32 Covering plate 40 Bearing device 41 Support shaft 41X 1Y Eccentric shaft 41A Boss part 42 Bearing 43 Fixing screw 51 Pivot shaft 52 Short arm 53 Restriction arm 53A, 53B Stopper 60 Auto hitch member 61 Portal member 62 Plate 63 Lower link hitch pin 64 Hook 64A Hook Part 64B Upper link mounting seat

[Procedure amendment]

[Submission date] March 30, 1998

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 4

FIG. 5

FIG. 13

FIG. 14

FIG. 3

FIG. 6

FIG. 7

FIG. 8

FIG. 9

FIG. 10

FIG. 11

FIG.

Continued on the front page (72) Inventor Yoshio Tanabe 300 Tenjindai, Maino, Miura-mura, Inashiki-gun, Ibaraki Pref. Sugano Agricultural Machinery Co., Ltd.

Claims (6)

[Claims] At least a three-point link hitch mechanism,
In a sowing compound work machine attached to a tractor equipped with a lift mechanism, an upper link is provided at the front of the work machine, and a lower link mounting portion is provided, which is directly or indirectly provided in the soil crusher, A leveling device, a trenching device, and a sowing compound work machine in which a seeding covering device and a pressure-reducing roller are arranged and mounted at a position rearward in the work traveling direction of the soil crushing device.
The upper link and its mounting portion have a free zone between the upper link and the work implement that can move freely by a fixed distance within a plane along the work traveling direction, and has a tractor. When the lower link is lifted by the lift mechanism, at least the leveling device after the soil crusher is lifted by a lift amount smaller than the actual lift amount with the crushing roller as a fulcrum so as to eliminate the accumulation. A sowing compound work machine characterized by the above-mentioned. 2. The sowing method according to claim 1, wherein the free zone is formed directly on the working machine so that the hitch portion of the upper link can move in a vertical plane along the working direction. Combined work machine. 3. The free zone is formed directly on the working machine so that the hitch portion of the upper link can rotate within a predetermined range in a vertical plane along the working direction. Item 2. A combined seed working machine according to Item 2. 4. An auto hitch member, wherein the free zone is formed on the auto hitch member to which the upper link is attached so as to be movable in a vertical plane along a working direction. 2. The combined seed working machine according to 1. 5. The work machine according to claim 1, wherein the free zone is formed on the working machine such that a hitch pin of an auto hitch member to which the upper link is attached can move in a vertical plane along a working direction. 2. The combined seed working machine according to 1. 6. The combined sowing machine according to claim 1, wherein the pressure-suppressing roller is wound with a soil-adhesion prevention belt that is longer than its perimeter.