JP2972599B2 - Tilling machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a tilling work machine,
For example, the present invention relates to tilling and crushing a paddy field, leveling and leveling the surface of the crushed soil, tilling and cultivating the paddy field, and performing burling work to remove the ground and level the soil.

[0002]

2. Description of the Related Art Conventionally, as this kind of tilling work machine, for example, as described in Japanese Patent Application Laid-Open No. 6-169604, a handle is provided at the upper end of a work machine body provided with a rotary work body rotatably. And a leveling body that is located at a rear portion of the rotary working body and that leveles mud crushed by the rotary working body is provided rotatably in a vertical direction. The terrain body is interlocked and connected to the upper end of the machine body via a link mechanism having an adjusting rod that can move back and forth and can rotate vertically, and the adjusting rod is urged rearward to the adjusting rod. There is known a configuration in which a coil spring is wound and the lock mechanism is used to convert the terrain body into a scraping work posture and a soil removal work posture via a link mechanism.

[0003]

According to the configuration described in the above publication, even if the terrain body is disposed in the scraping work posture by the lock mechanism via the link mechanism, the terrain body and the link mechanism are not removed. The weight is adjusted by the coil spring wound on the adjusting rod in the downward rotating direction, and the ground leveling operation is easily performed in a state where the ground leveling body is inclined backward and downward more than necessary at the time of scraping work. However, not only is there a strong tendency to push mud forward in the terrain, but there is also the inconvenience of sweeping out muddy water to both sides in the traveling direction,
In addition, there is a problem that a level difference occurs at a seam with the previous process, so that the ground cannot be leveled as a whole, and that too much muddy water is swept out, whereby burial of miscellaneous materials tends to be insufficient.

[0004] The present invention has been made in view of such a point, and restricts the downward rotation of a terrain body arranged in a substitute scraping posture, and pushes back mud with the terrain body. And prevent the muddy water from being excessively swept out to both sides in the advancing direction, prevent a step from occurring at the seam with the previous process, and level the ground as a whole, and also prevent the muddy water from being excessively swept out. It is an object of the present invention to provide a tilling machine capable of sufficiently burying miscellaneous materials.

[0005]

According to a first aspect of the present invention, there is provided a tilling machine having a rotary working body rotatably provided with a rotary working body, and a rotary working body positioned at a rear portion of the rotary working body. turning the leveling member vertically rotatably disposed to leveling the mud that has been Harrow by the rotary working member, the ground leveling body via a link mechanism provided in the working machine bodies in puddling work posture A terrain body operating mechanism having an operation handle for operating the terrain body, the link mechanism being urged rearward and upward to restrict the downward rotation of the terrain body switched to the scraping work posture by the terrain body operating mechanism. and energizing means <br/> provided, said biasing means, in the vertical direction in the machine body
A front-rear forward / backward rod rotatably mounted on a shaft, and the link
A mechanism is provided to be rotatable on the link of the mechanism.
And the rotating body inserted through the
The link of the link mechanism through the body upward and rearward
And an energizing spring .

[0006] The terrain body arranged in the scraping operation posture by the terrain body operating mechanism is prevented from further rotating downward from the state of the rubbing operation posture by the urging action of the urging means. . Accordingly, the ground is leveled as a whole by the leveling body, and no level difference is generated in a portion adjacent to the previous step, and miscellaneous materials are sufficiently buried.

[0007]

Further, the urging force of the spring, by the link of the link mechanism is energized toward the rear upper side through the rotary body, leveling member via the link mechanism is further lowered from the state of puddling work posture Rotation is prevented.

[0009] tilling machine according to claim 2, claim 1
In the tillage implement described, the reciprocating rod is fixed at one end thereof.
Front spring receiver engaged with one end of a spring
And the other side part is provided to be able to advance and retreat in the axial direction
A rear spring support that abuts and engages the other end of the spring.
It has a body .

[0010] Both ends of the spring are reliably supported by the front spring support and the rear spring support, and the rear spring support is directed by the spring toward the rotating body along the reciprocating rod. And the rear spring receiver is strongly urged in the direction of pressing the rotating body. Therefore, the link of the link mechanism is urged rearward and upward by the spring via the rotating body, and the leveling body is prevented from rotating further downward from the state of the substitute scraping work posture.

The tilling machine according to claim 3 is a rotary cultivator.
-A work machine body with a rotatable work body and this work machine
The body is located at the rear part of the rotary working body and
Soil is rotatably arranged in the direction
And a ground preparation body for preparing the mud soil provided on the work implement body.
To the working posture by scraping the terrain through the link mechanism
A terrain control mechanism having an operation handle for rotating operation,
The link mechanism is urged rearward and upward to adjust the terrain body.
The leveling that has been switched to the scratching posture by the operating mechanism
An urging means for restricting the downward rotation of the body, wherein the urging means is slidably provided in a state in which the cylinder filled with the pressure fluid and the pressure fluid are separated in the cylinder. A piston having an orifice for allowing the pressure fluid to flow from one side to the other side, and a rod connected to the piston and protruding from the cylinder so as to be able to advance and retreat,
It consists cylinder type fluid spring having, in which rotatably to pivotally to each vertically between the link of the cylinder type fluid spring of the cylinder and the rod and the machine body and the link mechanism .

Then, the rod is moved forward and backward with respect to the cylinder, and the piston is slid in the axial direction while compressing the pressure fluid. At this time, the pressure fluid on one side divided by the piston is moved to the orifice of the piston. Through the other side, the piston resting in a balanced position at any point in the cylinder.

Therefore, the grading body disposed in the scraping operation posture by the terrain body operation mechanism is prevented from further turning downward from the state of the scraping operation posture by the urging action of the urging means. You. Then, the ground is leveled as a whole by the leveling body, so that no step is formed in the portion adjacent to the previous step, and miscellaneous materials are sufficiently buried.

According to a fourth aspect of the present invention, there is provided a tilling work machine according to the third aspect.
In the tilling machine described above, the rod is configured such that a shaft-attached portion on which the rod is axially displaceable is vertically movable.
By vertically displacing the shaft attachment portion of the rod, the rod is vertically displaced in a state corresponding to the shallow working depth of the rotary working body, and the cylinder having this rod is also vertically displaced. Further, the rod and the cylinder prevent the leveling body from further lowering and rotating from the state of the scraping work posture.

The tilling machine according to claim 5, claim 3
Alternatively, in the tilling machine according to 4 , the rod is covered with an extendable bellows body. And the rod that expands and contracts with respect to the cylinder is always covered with a bellows body,
It is possible to prevent the rod from being damaged, mud or the like from adhering to the rod, rusting the rod, and obstructing expansion and contraction of the rod.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The first embodiment will be described with reference to FIGS. 1 and 2, reference numeral 1 denotes a working machine main body. The working machine main body 1 has a left-right hollow pipe-shaped main frame 2, and a transmission (not shown) is provided at an intermediate portion of the main frame 2. Is fixed, and an input shaft 4 of the mission protrudes forward from the front side of the transmission case 3 so as to be rotatable forward.

A vertical transmission case 5 and a bracket (not shown) disposed opposite to each other are integrally fixed to both ends of the main frame 2, respectively, and lower ends of the transmission case 5 and the bracket are respectively fixed. A rotary work body 6 for crushing tilled soil is rotatably mounted between the sections.

The rotary working body 6 has a left-right rotating shaft 7 rotatably supported between the lower end portions of the transmission case 5 and the bracket. A substitute scratch 8 is protruded radially. And
The rotary working body 6 is configured to be rotationally driven by an output from an output shaft (not shown) of the transmission via an interlocking medium provided in the transmission case 5.

A cover 9 covering the upper part of the rotary working body 6 is integrally fixed between the transmission case 5 and the upper part of the bracket. This cover body 9
Has left and right side plates 10 fixed to the inner side of the transmission case 5 and the bracket, and has an arcuate upward between the upper ends of the left and right side plates 10 following the rotation locus of the rotary work body 6. The top plate 11 formed in a curved shape is integrally fixed. A left-right reinforcing frame 12 is integrally fixed to the rear upper portion of the top plate 11, and the reinforcing frame 12 is
13 and a vertical portion 14.

Further, a mud suppressor 15 in the left-right direction is integrally provided below the front end of the top plate 11 at a position above and in front of the rotation locus of the rotary work body 6. The mud suppressor 15 is formed to have a vertical portion 16 in the left-right direction and a horizontal portion 17 protruding horizontally forward from the lower end of the vertical portion 16. The upper end of the vertical portion 16 is fixed near the front end of the top plate 11, and the front end of the horizontal portion 17 is fixed to the front edge of the top plate 11.

In the vicinity of both ends of the main frame 2, substantially triangular arm mounting plates 19 are integrally fixed, respectively, and the front edges of the left and right arm mounting plates 19 are vertically spaced at predetermined intervals. A plurality of mounting holes 20 are respectively formed. Further, support pieces 22 are detachably connected to the mounting holes 20 formed in the protruding end portions of the left and right arm mounting plates 19 which are directed forward and downward by bolts and nuts 21, respectively. The top plate 11 of the cover body 9 is supported by the left and right support pieces 22.
The left and right support pieces 22 are fixed to the cover body 9 with bolts and nuts 18.

Further, connecting arms 23 in the front-rear direction are detachably connected to the left and right arm mounting plates 19, respectively. A plurality of communication holes 24 communicating with the plurality of mounting holes 20 of the left and right arm mounting plates 19 are formed at predetermined intervals in the vertical direction at the base end of the left and right connecting arms 23. Left and right lower pins 25 are protruded from the distal end so as to be detachable. The left and right connecting arms 23 are attached to and detached from the left and right arm mounting plates 19 with bolts and nuts (not shown) inserted into a plurality of mounting holes 20 and a plurality of communication holes 24 which communicate with each other. They are freely connected.

The left and right arm mounting plates 19 include
Using the required number of mounting holes 20 in the plurality of mounting holes 20,
The various left and right connecting arms 23 capable of connecting the left and right lower links of various types of tractors are connected by a plurality of communication holes 24 and bolts and nuts (not shown) formed in the connecting arm 23. It has become.

Next, an elastic plate 26 made of rubber or the like in the left-right direction is integrally fixed to the rear end of the top plate 11 of the cover body 9, and the lower end of the elastic plate 26 is A leveling plate 27 serving as a leveling body disposed at the rear is fixed, and a rake 29 serving as a leveling body is rotatably supported on a lower end portion of the leveling plate 27 by a horizontal support shaft 28 so as to be vertically rotatable. Have been.
The flat plate 27 fixed to the elastic plate 26 and the rake
At 29, a leveling mechanism 30 for leveling the mud crushed by the rotary work body 6 is configured.

Next, in FIGS. 2, 3 and 5, the upper end portion of the working machine body 1, that is, the transmission case 3, is provided with the grounding operation posture of the ground leveling mechanism 30 and the soiling operation posture. Terrain operation mechanism
31 are provided. The terrain body operating mechanism 31 has a vertical mounting frame 32 integrally fixed from the upper end of the transmission case 3 along the rear side thereof, and the mounting frame 32 is spaced at a predetermined interval in the left-right direction. It is formed of a pair of left and right mounting plates 33 arranged at a distance from each other.

First mounting holes 34 are respectively formed at upper ends of the left and right mounting plates 33 so as to face each other. The left and right mounting plates 33 are located at rear portions of the first mounting holes 34. A second mounting hole 35 is formed at an upper portion of the mounting plate 33. The left and right mounting plates 33 are located at lower portions of the second mounting hole 35.
A third mounting hole 36 is formed at a lower portion of the mounting plate 33, and a fourth mounting hole is positioned below the third mounting hole 36 at a lower end of the left and right mounting plates 33. 37 are formed respectively.

Next, between the first mounting holes 34, the lower ends of the vertical turning arms 39 are connected by bolts and nuts 38 which are removably inserted into the first mounting holes 34. It is rotatably supported in the front-rear direction. The rotating arm 39 is formed in a substantially U-shaped cross section, and a communication hole 40 communicating with the first mounting hole 34 is formed at a lower end thereof,
A support shaft 41 is mounted on the upper end thereof, and a first stopper 42 in the left-right direction is fixed to a substantially middle portion thereof. The pivot arm 39 is pivotally supported in the front-rear direction so as to be pivotable about a bolt of a bolt / nut 38 inserted into the first mounting hole 34 and the communication hole 40.

Next, a mounting shaft is provided between the second mounting holes 35.
A cam body 44 is integrally fixed to the mounting shaft 43 at a position between the left and right mounting plates 33. The cam body 44 has a mounting hole 45 formed at the center thereof through which the mounting shaft 43 is inserted and fixed, and a cam surface 46 formed at a peripheral portion centered on the mounting hole 45. 46
On one side, a first engaging concave portion 47 is formed so as to be detachably engaged with the first stopper 42.

The other side of the cam surface 46 has the first
A second engagement recess 48 is formed on the opposite side of the engagement recess 47 of the second engagement recess 48.
It has one engaging step 48a recessed toward 45 and the other engaging step 48b recessed toward the mounting hole 45 at the other end. The second engagement recess 48 is located below the second mounting hole 35 and is fixed between the left and right mounting plates 33 in the left-right second stopper 49.
And is slidably engaged with the main body.

One end of the coil spring 50 is engaged with the cam body 44, and the other end of the coil spring 50 is moved from the one mounting plate 33 to the other mounting plate.
It is engaged with a locking projection 51 protruding toward 33.
The cam body 44 is rotationally urged forward by the coil spring 50.

A connecting projection is provided at one end of the mounting shaft 43.
43a is bent substantially at right angles, and the connecting projection 43a is formed.
An operation handle 52 for rotating the cam body 44 is integrally fixed to the cam body 44.

Next, in FIGS. 1, 2, 4 and 6, a rake 29 as the ground-fixing body and a support shaft 28 are attached to a support shaft 41 mounted on the upper end of the rotating arm 39. A link mechanism 53 that rotates in conjunction with the vertical direction as a center is connected. The link mechanism 53 is a support shaft of the rotation arm 39.
A fore-and-aft link 54 with one end pivotally mounted on 41
An intermediate portion of a front-rear rotating frame 55 as a link is rotatably mounted on a support shaft 56 at the other end of the interlocking rod 54.

The rotating frame 55 has left and right side plates 55a and is formed in a substantially U-shaped cross section with an open lower surface, and an integrated top plate 55b is provided between the upper ends of the left and right side plates 55a. A shaft support body 57 having a substantially U-shaped cross section and having the support shaft 56 mounted thereon is integrally fixed to an intermediate portion of the support shaft 56. Also, the left and right side plates
55a formed at one end of 55a, and
Left and right support shafts 59 are rotatably mounted on mounting holes 58 formed in the vicinity of lower ends of the left and right mounting plates 33 communicating with c. Are pivotally mounted in a vertically rotatable manner.

The upper end of a vertical hanging rod 61 is rotatably mounted on a mounting hole 55d formed in the other end of the left and right side plates 55a by a mounting shaft 60 in a left and right direction. This hanging rod
At the lower end of 61, a mounting piece 62 integrally protruding from the upper part of the rake 29 is rotatably mounted on a support shaft 63 in the left-right direction. Further, left and right side plates 55a of the rotating frame 55
Is the protrusion 64 that protrudes toward the lower rear
Each of the left and right protruding portions 64 is formed with a circular mounting hole 65 facing each other.

Next, a substantially U-shaped connecting frame 66 is integrally fixed to the horizontal portion 13 of the reinforcing frame 12 located below the mounting frame 32. A communication hole 68 is formed at the front upper end of the plate 67 so as to communicate with the opposing fourth mounting hole 37 at the lower end of the mounting frame 32. The lower ends of the mounting frames 32 are connected to the connection frame 66 by bolts and nuts 69 inserted into opposing communication holes 68 and fourth mounting holes 37 communicating with each other. In addition, mounting holes 70 are formed at upper rear end portions of the left and right frame plates 67 of the connection frame 66, respectively.

Next, referring to FIGS. 1, 3 and 4, between the connecting frame 66 and the turning frame 55, the turning frame 55 is urged upward to support the hanging rod. There is provided an urging means 71 for regulating the downward rotation of the rake 29 via 61, that is, the downward rotation of the rake 29, which has been switched to the substitute scratching posture, around the support shaft.

The urging means 71 has a forward / backward moving rod 73 which is rotatably supported in a vertical direction by a mounting shaft 72 inserted into a mounting hole 70 of the connecting frame 66, and which is rotatable vertically. This forward and backward rod
A spring receiver 75 having a flange 74 is fitted and integrally fixed to a portion near one end (front side) of the 73.

The rotating frame 55 has a left-right rotating body 76 rotatably inserted into the opposing mounting hole 65, and the advancing / retracting rod 73 is movable at an intermediate portion of the rotating body 76. The guide holes 77 are formed in the front-rear direction and penetrated therethrough. Annular grooves 78 are formed at both ends thereof, and the annular grooves 78 at both ends are engaged with the outer sides of the left and right side plates 55a. Retaining rings 79 for retaining the rotating body 76 are fitted respectively.

Further, a spring receiver 81 having a flange 80 and located in front of the rotating body 76 is fitted to the advancing / retracting rod 73 so as to be slidable in the axial direction. It is formed to have an engagement projection 82 that engages with 76. A coil spring 83 is wound around the advancing / retracting rod 73. One end of the coil spring 83 is engaged with the flange 74 of the front spring receiver 75, and the other end of the coil spring 83 is Are engaged with the flange 80 of the rear spring receiver 81.

The rotating body 76 is constantly urged rearward and upward by the coil spring 83 via the rear spring receiving body 81, and the link that supports the rotating body 76 in a freely rotatable manner. The rotating frame 55 of the mechanism 53 is urged upward and supported, and the descending rotation of the rake 29 about the support shaft 28 is restricted via the suspension rod 61. .

Further, a plurality of insertion holes 73a are formed in the rear side of the advance / retreat rod 73 at predetermined intervals in the axial direction so as to penetrate in a direction perpendicular to the advance / retreat rod 73, respectively. The receiving body 81 is formed with a communication hole 81a that communicates with one of the plurality of insertion holes 73a of the advance / retreat rod 73, and the selected one of the insertion holes 73a of the advance / retreat rod 73 communicates with the rear spring receiving body 81. The coil spring 83 wound around the reciprocating rod 73 is largely compressed to the front side of the reciprocating rod 73 by inserting the spring retaining pin 73b into the hole 81a so as to be freely inserted and removed, that is, the coil spring 83
At 83, the coil spring 83 is held without urging the rotating body 76.

Next, in FIGS. 2 and 5, a top mast in the front-rear direction, that is, a connecting frame 84 is attached to the mounting plate 33 opposite to the mounting frame 32.
Are detachably connected in a state of covering. The connection frame 84 includes a front-back facing connection side plate 85 in which a lower end portion is engaged with an outer portion of the opposite mounting plate 33, and a top plate connected between the upper end portions of the opposed connection side plates 85.
86 are formed to have a substantially U-shaped cross section.

A connecting portion 87 is formed opposite to the tip of the connecting side plate 85, and the bolt / nut 38 is mounted on the opposing connecting side plate 85 at a substantially middle portion in the front-rear direction. Insertion holes 88 through which the bolts are inserted so as to be able to be inserted and removed are formed opposite to each other, and the connection side plate 85 located at the lower rear end thereof communicates with the opposed third attachment hole 36. In addition, insertion holes 90 into which the bolts of the bolts and nuts 89 are inserted so as to be able to be inserted and removed are formed facing each other.

The connecting frame 84 is removably connected to the mounting frame 32 by the bolts and nuts 38 on the front side and the bolts and nuts 89 on the rear end so as to cover the terrain body operating mechanism 31. ing. Then, the work machine body 1 is detachably connected to the three-point connecting mechanism of the tractor, that is, the top link and the left and right lower links by the connecting frame 84 and the left and right connecting arms 23. Thus, the connection frame 84 and the left and right connection arms 23 can be easily formed in a plurality of types corresponding to the top link and the left and right lower links of various tractors, and can be selected according to the top link and the left and right lower links of the various tractors. Are connected detachably.

2, 3 and 7, a support frame 91 is fixed to the left and right portions of the reinforcing frame 12, and a left and right support shaft is attached to the rear end of the support frame 91. A vertical rotation frame 93 is rotatably mounted in the front-rear direction at 92 at a rear end of the rotation frame 93, and is rotatably mounted on a rear end of the rotation frame 93 by a horizontal support shaft 94. The flat plate 27 is rotatably mounted on a lower end of the suspension rod 95 so as to be rotatable about a horizontal support shaft 96.

Further, between the supporting frame 91 and the turning arm 93, the turning frame 93 is urged and supported upward, and the leveling plate 27 is held in a predetermined position via the hanging rod 95. An urging mechanism 97 is provided for regulating the descent in the state set at the position. In the figure, 98 is an operation handle of the urging mechanism 97, 99
Denotes a first stopper of the operation handle 98, 100 denotes a second stopper of the operation handle 98, and 101 denotes a rotating shaft of the operation handle 98.

Next, the operation of the above embodiment will be described.

When connecting the working machine body 1 to the tractor,
If necessary, the connection frame 84 of the work implement body 1 is detached and replaced according to the type of the tractor. That is, the bolts and nuts 38 before and after the left and right mounting plates 33 of the mounting frame 32,
At the same time as removing the 89, the predetermined connecting frame 84 selected according to the type of the tractor is engaged with the left and right mounting plates 33 of the mounting frame 32, and the left and right mounting plates 33 are attached to the front and rear bolts and nuts 38, 89. To connect the connection frame 84.

At this time, since the terrain body operating mechanism 31 having the operation handle 52 for changing the terrain work posture of the rake 29 is not attached to the connecting frame 84, the connecting frame 84 can be easily attached and detached and replaced. it can. The connection frame 84 is detachably connected to the upper end of the work machine main body 1 in a state of covering the ground adjustment body operation mechanism 31 at the upper end of the work machine main body 1.

The left and right connecting arms 23 of the working machine main body 1 are detached and exchanged as necessary according to the type of the tractor. That is, the left and right arm mounting plates 19 of the working machine body 1
The bolts and nuts 21 are removed respectively, and the predetermined connecting arm 23 selected according to the type of the tractor is engaged with the left and right arm mounting plates 19. To connect the left and right connecting arms 23.

The distal end of the connecting frame 84 connected to the work machine body 1 is rotatably connected to the distal end of the top link of the tractor by a connecting pin (not shown) inserted into the connecting portion 87. The working machine body 1 is connected to the tractor by pivotally connecting the lower pins 25 at the leading ends of the left and right connecting arms 23 connected to the working machine body 1 to the leading ends of the left and right lower links of the tractor. You. Also,
Work machine body 1 via PTO shaft of tractor via power transmission shaft
The input shaft 4 of the mission is connected.

Further, an operation handle of the terrain body operation mechanism 31
By performing the switching operation of 52, the rake 29 is brought into the predetermined terrain work posture in which the rake 29 lands the mud crushed by the rotary work body 6 via the link mechanism 53, that is, the rake 29 is brought into the work posture of the scraping work or the digging work. Switching is set.

That is, when the operation handle 52 is rotated forward during the scraping operation, the cam body 44 is rotated forward by the mounting shaft 43 integrated with the operation handle 52, and The second engagement recess 48 of the body 44 is slid along the second stopper 49, and the other engagement step 48b of the second engagement recess 48 is biased into engagement with the second stopper 49. Is done. Therefore, the rotation of the cam body 44 is locked by the second stopper 49.

When the rotation of the cam body 44 is locked, the rotation arm 39 receiving the load of the rake 29 and the link mechanism 53 is rotated downward about the bolts of the bolts and nuts 38. First stopper 42 of moving arm 39
Are engaged with the cam surface 46 of the cam body 44. When the first stopper 42 of the rotating arm 39 is rotated downward so as to engage with the cam surface 46 of the cam body 44, the link mechanism 53 is slightly lowered and rotated by the rotating arm 39. The rake 29 is pivoted slightly downward about the support shaft 28, and the
As shown in FIG. 7, the rake 29 is switched to the substitute scratching posture in which the rake 29 is inclined rearward and downward at a predetermined inclination angle.

During the scraping operation, the coil spring 83 of the urging means 71 provided between the connecting frame 66 and the rotary arm 55 rotates the rotary member 76 via the spring receiver 81 on the rear side of the advance / retreat rod 73.
Is always urged upward and rearward, so that the rotating frame of the link mechanism 53 that rotatably supports the rotating body 76
55 is urged upward and the hanging rod 61
The rake 29 is held in a substantially horizontal scraping work posture by restricting the downward rotation of the rake 29 about the support shaft 28 through the, and the rake 29 can further rotate downward. Is prevented.

The left and right urging mechanisms 97 of the work machine main body 1 are operated by rotating the operation handles 98 of the right and left urging mechanisms 97, thereby switching the right and left urging mechanisms 97. The flat plate 27 is switched by the mechanism 97 to a substitute scraping posture in which the flat plate 27 is inclined rearward and downward at a predetermined inclination angle in accordance with the substitute posture of the rake 29.

Next, as the work machine body 1 is towed by the tractor and the input shaft 4 is rotated by the output from the PTO shaft of the tractor, the output of the input shaft 4 from the output shaft of the mission is transmitted. Accordingly, the rotary working body 6 is rotationally driven via the interlocking medium in the transmission case 5. Then, the tilling soil is sequentially scraped and crushed by each of the scraping claws 8 of the rotary working body 6 while being crushed and crushed, and the surface of the crushed mud is gradually leveled by the rake 29.

At this time, the rake 29 is held in a substantially horizontal scraping posture by the urging means 71, and the further downward rotation of the rake 29 is restricted. Is not greatly pushed back forward, and the rake 29 is pivoted down more than necessary, so that no step is formed at the seam with the adjacent part of the previous stroke, and furthermore, too much muddy water is swept out. Insufficient embedding is prevented.

In the above-mentioned scraping work, if it is necessary to roughen the tilled soil at first depending on the soil condition of the field, the weight of the link mechanism 53 and the rake 29 is applied to the tilled soil to perform the scraping work. First, the rear spring receiver 81 of the urging means 71 is slid forward along the reciprocating rod 73, and the coil spring 83 is moved by the rear spring receiver 81 to the front spring receiver 75. And the insertion hole 73a at the selected position of the reciprocating rod 73 and the insertion hole 73a.
A spring stopper pin 73b is mounted in the communication hole 81a of the rear spring receiver 81 which communicates with the spring receiving member 81. This prevents the rotating body 76 from being biased by the coil spring 83.

At the time of the second finishing, the cultivated crushed soil is softened by the rough scraping of the first cultivated crushed soil. While restricting that the rake 29 disposed in the scraping work posture is further lowered and rotated as in the case of the above-described embodiment, the plowed crushed soil softened by the rake 29 is sequentially flattened. It is leveled.

Next, at the time of soil removal work, the operation handle
When the 52 is rotated backward, this operation handle
The cam body 44 is pivoted rearward by the mounting shaft 43 integral with the 52, and the second engagement recess 48 of the cam body 44 is slid along the second stopper 49, and One engagement step 48a of the second engagement recess 48 is urged into engagement with the second stopper 49.

When the cam body 44 is rotated rearward, the cam surface 46 of the cam body 44 is disengaged from the first stopper 42 of the rotating arm 39 and the load of the rake 29 and the link mechanism 53 is reduced. The rotating arm 39 receiving the bolt and nut 38
Of the arm 39
The first stopper 42 is engaged with the first engagement recess 47 of the cam body 44. Then, the first engagement recess 47 of the cam body 44 is formed.
, The rotating arm 39 is forcibly lowered and rotated about the bolt of the bolt / nut 38 via the first stopper 42.

Therefore, the second stopper 49 is
The one engaging step 48a of the second engaging recess 48 of 44 is engaged, and the first engaging recess 47 of the cam body 44 engages the first stopper 42 of the rotating arm 39. By doing
This rotating arm 39 is locked in a state where it is rotated downward,
The downward rotation of the rotation arm 39 toward the rear and the upward rotation of the rotation arm 39 toward the front are locked.

When the first stopper 42 of the turning arm 39 is turned downward so as to engage with the first engaging recess 47 of the cam body 44, the link arm 53 is rotated by the turning arm 39. The rotating frame 55 is pivoted down about the support shaft 59 by the interlocking rod 54, and the mounting shaft at the distal end of the rotating frame 55
The suspension rod 61 is lowered via 60, and the rake 29 is rotated downward about the support shaft 28 by the suspension rod 61. Then, as shown in FIG. 9, the rake 29 is protruded from the state of the substitute scraping operation inclined at a predetermined inclination angle downward and rearward to the state below the leveling plate 27 so as to be substantially vertical. The posture is switched and set.

At this time, when the rotating frame 55 is rotated downward about the support shaft 59, the rotating frame 55
While rotating 76, the reciprocating rod 73 is attached to the mounting shaft 72 by the rotating body 76.
And the engaging projection 82 of the rear spring receiving body 81 is pushed forward by the rotating body 76 along the reciprocating rod 73 toward the front in the axial direction. The coil spring 83 is pushed by the flange 80 of the spring receiver 81 and is compressed.

When the rake 29 is switched to the soiling operation posture, the advancing / retracting rod 73 is displaced substantially horizontally and is compressed by the compressed coil spring 83 via the rear spring receiving member 81. The rotating frame 55 is urged rearward.

Accordingly, the rake 29 is provided with the terrain body operating mechanism 31.
By locking the rotation of the rotation arm 39 with the cam body 44, the rake 29 is held in a state where the rake 29 is switched to the soil pulling posture via the link mechanism 53, and the urging action of the urging means 71 The rake 29 is further restricted from rotating downward.

Next, as the work implement body 1 is towed by the tractor and the input shaft 4 is rotated by the output from the PTO shaft of the tractor, the output of the input shaft 4 from the output shaft of the transmission is transmitted. Accordingly, the rotary working body 6 is rotationally driven via the interlocking medium in the transmission case 5.

Then, the tilled soil is sequentially scraped and crushed by each of the scraping claws 8 of the rotary working body 6 while being crushed and crushed, and the crushed mud is successively crushed by the rake 29 to remove the surface of the mud. It is leveled in order. That is, the mud at a high position in the field is laid down and leveled by the rake 29 to a low position, and the field is leveled as a whole.

Next, a second embodiment will be described with reference to FIGS. In the second embodiment, a ground shaping body 2 in a scraping work posture operated by a ground shaping body operation mechanism 31 is used.
As means for restricting the downward rotation of 7, 29, the present invention relates to an urging means 109 having a form different from that of the first embodiment. Since other embodiments are the same as the first embodiment, the same components in the configuration are denoted by the reference numerals used in the first embodiment, and the description is omitted.

The urging means 109 of the second embodiment comprises a cylinder type fluid spring 110. The cylinder type fluid spring 110 is divided into a cylindrical cylinder 112 filled and filled with a pressure fluid 111 such as a compressed gas, and a first chamber 113 and a second chamber 114 in the cylinder 112. And an orifice 115 for allowing the pressure fluid 111 to flow from one side to the other side, that is, between the first chamber 113 and the second chamber 114 during sliding. Piston 116 having
And a rod 117 protruding from the cylinder 112 so as to be able to move forward and backward.

In the cylinder type fluid spring 110, the rod 117 is pushed or pulled by an external force, the piston 116 is slid by the rod 117, and the pressure fluid 111 is pushed by the piston 116. At the same time, the pressure fluid 111 flows into and out of the first chamber 113 and the second chamber 114 through the orifice 115 of the piston 116, and the piston 116 is suspended at an arbitrary position in the cylinder 112 by the pressure fluid 111. They come to rest together. By moving the rod 117 forward and backward, the pressure fluid 111 in the first chamber 113 and the pressure fluid in the second chamber 114 are alternately moved, so that the orifice 115 of the piston 116 provides speed control and cushioning. It has become.

The cylinder 112 has a connecting hole at its base end.
In addition to a connecting piece 119 formed with 118, a seal body 120 for sealing the pressure fluid 111 and a rod guide 121 for guiding the rod 117 to move forward and backward are provided at the distal end thereof. The rod 117 has a mounting piece 123 having a mounting hole 122 formed at the tip. The rod 117 has a bellows body 124 covering the outer periphery of the rod 117. The base end of the bellows body 124 is the cylinder
112 and the cylinder
The distal end of the bellows body 124 is fixed to the base end of the mounting piece 123.

Next, a mounting board 126 is fixed to the horizontal portion 13 of the reinforcing frame 12, and support plates 127 are integrally and vertically erected, respectively, upward and opposite to the left and right portions of the mounting board 126. On the upper end of the left and right support plates 127, a left-right rotation support rod 129 having a handle 128 is supported so as to be horizontally rotatable.

Further, an interlocking piece 130 in the front-rear direction is fixed integrally to the left and right portions of the rotating support rod 129 in parallel with each other, and the rod is interposed between the rear end portions of the left and right interlocking pieces 130.
A mounting shaft 131 rotatably inserted into a mounting hole 122 of the mounting piece 123 of the 117 is detachably fixed. Further, the link mechanism 118 is provided in the connection hole 118 of the connection piece 119 of the cylinder 112.
The mounting shaft 60 of the 53 link 53 is rotatably inserted.

Next, the operation of the second embodiment will be described.

When the turning support rod 129 is turned by the handle 128 in a state in which the rake 29 is inclined rearward and downward at a predetermined inclination angle and the scraping work posture is set, this turning support rod is operated. The left and right interlocking pieces 130 are rotated at 129, and the mounting shaft 131 on which the shaft 117 is rotatably mounted is pivotally displaced by the left and right interlocking pieces 130. This rod 11
7 moves back and forth with respect to cylinder 112
Is displaced up and down about the mounting shaft 60 of the link 55 via the connecting piece 119.

When the working depth of the rotary working body 6 is relatively shallow, the rake 29 must be strongly lifted. In this case, as shown in FIG. Rod with left and right interlocking pieces 130
The mounting shaft 131 as a shaft mounting portion of the shaft 117 is lowered, and the link 55 is urged and supported rearward and upward by the rod 117 and the cylinder 112 mounted on the mounting shaft 131 via the mounting shaft 60. Therefore, when the working depth of the rotary working body 6 is relatively shallow, the rake 29 lifted up is regulated by the urging action of the cylinder type fluid spring 110 from further lowering and rotating.

When the working depth of the rotary working body 6 is relatively deep, the rake 29 does not need to be lifted more strongly than when the working depth of the rotary working body is relatively shallow. As shown in the drawing, the handle 128 is raised and rotated, so that the rod 11 is
The mounting shaft 131 as the shaft mounting part of 7 is raised, and this mounting shaft
The link 55 is urged and supported rearward by the rod 117 and the cylinder 112 which are mounted on the shaft 131 via the mounting shaft 60. Therefore, when the working depth of the rotary working body is relatively deep, the rake 29 lifted up is restricted from further lowering and rotating by the urging action of the cylinder type fluid spring 110.

When the mounting shaft 131 as a shaft attachment portion of the rod 117 is moved up and down, the rod 117 is moved forward and backward with respect to the cylinder 112 by the mounting shaft 131, and the piston 116 The piston 111 slides in the axial direction while compressing it. At this time, the pressure fluid 111 on one side divided by the piston 116 flows out to the other side through the orifice 115 of the piston 116.

That is, the pressure fluid 111 is supplied to the orifice 115
Are moved alternately between the first chamber 113 and the second chamber 114 through the piston.
116 is stopped in a balanced state at an arbitrary position in the cylinder 112. The orifice 115 of the piston 116 controls the flow speed of the pressure fluid 111, that is, the reciprocation of the rod 117, and also dampens the vibration of the rake 29 during the scraping operation.

Therefore, the rake 29 disposed in the substitute scraping work posture by the ground grading body operating mechanism 31 changes the rake 29 from the state of the substitute scraping work posture by the urging means 110, that is, the urging action of the cylinder type fluid spring 110. Further, downward rotation is restricted. Then, the rake 29 is leveled as a whole, so that there is no step in the portion adjacent to the previous step, and miscellaneous materials are sufficiently buried.

In the second embodiment, the case where the cylinder 112 of the cylinder type fluid spring 110 is mounted on the mounting shaft 60 of the link 55 and the rod 117 is mounted on the reinforcing frame 12 of the working machine body 1 has been described. Not limited to this, the cylinder 112 of the cylinder type fluid spring 110 is attached to the reinforcing frame 12 of the work machine body 1, and the rod 117 is
You may make it attach to 60 attachment shafts 60. With such a configuration, the same operation as that of the second embodiment can be obtained.

[0085]

Effects of the Invention According to the present invention, a lowering rotation of the leveling member disposed in puddling working posture by biasing action of the biasing means can be reliably restricted, Therefore, leveling member flat at it is possible to prevent the pushing back toward the front of the mud, it can be prevented too sweeping a muddy water on both sides of the traveling direction, in ground leveling member as a whole prevents the step is generated in the seam from the previous stroke can be leveled to the news, Ru can be fully embedded contaminants from the composition to prevent sweeping too much mud.

[0086] Further, toward the link of the link mechanism to the rear upward through the rotating body by urging force of the spring can be reliably energizing, the biasing means this and reciprocating rod, the reciprocating
Energizes the rotating body with the rod inserted and the link of the link mechanism
The number of parts is small and the configuration is simple due to the configuration including the spring .

[0087] According to the invention of claim 2, the effect of the invention according to claim 1, a simple structure for biasing the support toward the rear upper link link mechanism, the spring easily advancing and retracting rod The spring can be set, and the spring can be sufficiently functioned by preventing the spring from being bent by the reciprocating rod.

[0088] According to the invention of claim 3, by the pressure fluid in the movement of the piston is the flow and out from the through orifices one side to the other side, the piston in the pressure fluid is an arbitrary position in the cylinder And the ground leveling body can be reliably prevented from further rotating downward from the scraping work posture, the flow rate of the pressure fluid is controlled by the orifice of the piston, and the leveling is performed during the scraping work. The buffering action against the vibration of the body is obtained, and the ground can be leveled by the leveling body .

[0089] According to the invention of claim 4, the effect of the invention according to claim 3, reliably supported by the link mechanism by varying the axial attachment of the rod according to Shenzhen working depth Rotary working body It is possible to reliably restrict the leveling body from further lowering and rotating from the substitute scraping posture.

According to the invention of claim 5 , claim 3 or
In addition to the effect of the fourth invention, it can be reliably prevented that mud scattered when ground leveling work by snake belly body is attached to the rod, it can be reliably prevented that the rod of the rod or rusted reciprocating is inhibited by mud .

[Brief description of the drawings]

FIG. 1 is an enlarged side view showing a main part of a tilling work machine according to an embodiment of the present invention.

FIG. 2 is a side view of the tillage implement.

FIG. 3 is a rear view of the ground grading body operating mechanism in a partially cut-out state.

FIG. 4 is an enlarged side view of a state in which the earth grading body operation mechanism is switched to a soil removal operation.

FIG. 5 is an exploded perspective view of the earth grading body operation mechanism.

FIG. 6 is an exploded perspective view showing a part of an urging mechanism for urging the above link.

FIG. 7 is a perspective view of the support frame.

FIG. 8 is a side view showing a state where the above-mentioned leveling body is disposed in a scraping work state.

FIG. 9 is a side view showing a state in which the terrain is set to a burling operation state.

FIG. 10 is a side view in which a part of a tilling work machine according to another embodiment is omitted.

FIG. 11 is a sectional view of the urging means.

FIG. 12 is a side view of an attachment mechanism of the urging means.

FIG. 13 is a side view showing a state where a shaft attachment portion of the urging means is changed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work machine main body 6 Rotary work body 29 Leveling body 31 Leveling body operation mechanism 52 Operating handle 53 Link mechanism 55 Link 71, 109 Urging means 73 Advance / retreat rod 75 Spring receiver 76 Rotating body 81 Spring receiver 83 Spring 110 Cylinder type fluid Spring 111 Pressure fluid 112 Cylinder 115 Orifice 116 Piston 117 Rod 124 Bellows

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirofumi Hoshihara 5155 Shiokawa, Oji, Maruko-cho, Nagano-gun, Nagano Pref. Matsuyama Corporation (56) References JP-A-6-169604 (JP, A) JP-A-7- 250505 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) A01B 35/04 A01B 33/12

Claims (5)

(57) [Claims] 1. A work machine main body having a rotary work body rotatably provided therein, and a rotary work body disposed at a rear portion of the work machine main body and rotatably arranged in a vertical direction. a leveling member operating mechanism having a ground leveling member for leveling the Harrow been mud, the operating handle for rotating operating the leveling member to puddling working posture via the provided link mechanism to the working machine body Te, the link mechanism ; and a biasing means for regulating the downward rotation of the ground leveling body is switched to puddling working posture at toward the rear upward biasing to the ground leveling member operating mechanism, the biasing means, the working Vertically pivotable on the machine body
A forward-backward moving rod axially mounted on the
Rotatably mounted on the link, and the reciprocating rod is inserted to freely reciprocate.
Rotator, and the revolving rod is wound around the
To urge the link of the link mechanism upward and rearward
A tillage machine having a spring . 2. The split rod is fixed to one end of the rod.
Of the front spring engaging one end of the ring, and the other side
Is provided so as to be able to advance and retreat in the axial direction.
The tilling machine according to claim 1, further comprising a rear spring receiver engaged with the other end of the ring . 3. An operation in which a rotary work body is provided rotatably.
Industrial machine body and the rotary working body of the working machine body.
It is located at the rear part and is rotatably arranged in the vertical direction.
-Leveling body for leveling mud crushed by tally work
And, via a link mechanism provided in the working machine body,
An operation handle that turns the terrain to the scraping work posture
With the terrain body operating mechanism and the link mechanism
It is energized and the scraping operation posture is performed by the terrain body operation mechanism.
For regulating the downward rotation of the terrain body switched to
Means, the biasing means comprising: a cylinder filled with pressure fluid;
Slidable in a state where the pressure fluid is separated in the cylinder
The pressure fluid flows from one side to the other side during sliding.
A piston having an orifice to access and a piston
B, which is connected to the
And a cylinder type fluid spring having
The cylinder and the rod of the Linda type fluid spring are
Respectively between the work machine Body link of the link mechanism
Plowing耘working machine vertically characterized by rotatably journalled. 4. A rod attachment portion on which the rod is attached.
4. The device according to claim 3, wherein the device is vertically displaceable.
The tillage machine described. 5. The rod is covered with an elastic bellows body.
Tilling machine according to claim 3 or 4, wherein the that.