JP3027527B2 - 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 rotary work body is rotatably provided at the upper end of a work machine main body. A connecting frame connected to the top link of the tractor is detachably fixed with a plurality of screws, and a supporting protrusion and a bracket protruding from an upper end of the connecting frame are provided at a rear portion of the rotary working body. A terrain body operating mechanism for converting the terrain body into a scraping work posture and a soiling work posture via a link mechanism is switchably mounted, and is connected to left and right lower links of the tractor on left and right portions of the work machine body. A configuration in which an arm is detachably fixed is known.

[0003]

In the construction described in the above publication, the connecting frame at the upper end of the working machine main body and the connecting arms on the left and right of the working machine main body connect the working machine main body to top links of various types of tractors of different types. It is detachably fixed to the work machine main body so as to enable connection to the left and right lower links.

[0004] However, since the grounding body operation mechanism for changing the grounding work posture of the grounding body is attached to the connecting frame of the work machine main body, when the connecting frame is detached and replaced according to the type of the tractor. , Removing the terrain control mechanism from the connection frame and requiring the trouble of reattaching the terrain control mechanism to a new connection frame,
The operation of replacing the connection frame is not easy, and the terrain body operation mechanism projects above the connection frame and is exposed. In addition, there is a problem that it is necessary to be careful not to pinch a hand or the like with a lock mechanism for locking the terrain body at the set position at the time of switching operation of the terrain body operation mechanism, which is not preferable in appearance.

[0005] The present invention has been made in view of such a point, the replacement operation of the connecting frame is easy, the switching operation of the terrain body operating mechanism is easy, and the terrain body operating mechanism can be easily operated by the connecting frame. It is an object of the present invention to provide a tilling work machine that can cover and secure the safety at the time of a switching operation of a terrain work operation mechanism, can prevent the entire work machine from being enlarged by the terrain work operation mechanism, and has a preferable appearance. Things.

[0006]

According to a first aspect of the present invention, there is provided a tilling work machine, wherein a rotary work body is rotatably provided on a work machine main body and a rear part of the rotary work body of the work machine main body. A grading body for grading mud crushed by the rotary working body, a grading body operating mechanism having an operation handle provided at an upper end portion of the work machine main body for changing a terrain work posture of the grading body, and A connection frame detachably attached to an upper end portion of the working machine main body in a state of covering the body operation mechanism and having a connecting portion connected to a top link of a tractor that pulls the working machine main body at a distal end portion. It is.

When connecting the main body of the working machine to the tractor, the connecting frame of the main body of the working machine is detached and replaced as necessary according to the type of the tractor. At this time, since the grading body operation mechanism having the operation handle for changing the terrain work posture of the terrain body is not attached to the connecting frame, the connecting frame can be easily attached and detached and replaced. The connection frame is detachably attached to the upper end of the work implement body in a state of covering the terrain body operating mechanism at the upper end of the work implement main body.

[0008] Further, by connecting the connecting portion at the distal end portion of the connecting frame attached to the work machine body to the top link of the tractor, the work machine body is connected to the tractor. Then, by switching the operation handle of the terrain body operation mechanism, the terrain body is switched to a predetermined terrain work posture for grading mud crushed by the rotary work body.

The tilling work machine according to the second aspect is the first aspect of the invention.
In the tilling work machine described in the above, the terrain body operating mechanism is pivotally supported by a mounting frame provided at the upper end portion of the work machine body so as to be rotatable in the front-rear direction and interlocks the terrain body via a link mechanism. And a cam body rotatably supported by the mounting frame in the front-rear direction to rotate the rotation arm in the front-rear direction to convert the terrain body into a scraping work posture and a burping work posture. And an operation handle that is fixed and rotatably operates the cam body.

When the cam body is rotated by the operation handle, the rotating arm is rotated by the cam body in the front-rear direction about the support shaft of the mounting frame. The ground preparation body is converted into a substitute scraping posture or a burrowing posture via the mechanism.

The tilling work machine according to claim 3 is a tilling work machine according to claim 2.
In the tilling work implement described in 1 above, the cam body is engaged with a first stopper provided on the rotating arm so as to be detachably engaged with the first stopper.
And a second engagement recess slidably engaged with a second stopper provided on the mounting frame, and is urged forward by a spring. .

Then, the cam body is rotated by the operation lever, and the first engagement concave portion of the cam body is engaged with the first stopper of the rotation arm, so that the earth-removing body is in the soiling work posture. Is set to. In this case, the second
Is engaged with the second stopper of the mounting frame. Further, the other end of the second engaging concave portion of the cam body is urged and engaged by the second stopper of the mounting frame, so that the terrain body is converted and set to the scraping work posture. In this case, the first engagement concave portion of the cam body comes off the first stopper of the rotating arm.

[0013] The tilling work machine according to the fourth aspect is the first aspect of the invention.
In the tilling work machine described in the above, the connecting frame having a connecting portion at the distal end portion is detachably attached to the mounting frame provided at the upper end portion of the working machine main body with its base end covering the terrain body operating mechanism. It is what is being done. When the base end of the connection frame is connected to the mounting frame, the ground control body operating mechanism provided on the mounting frame is covered with the base end of the connection frame.

[0014]

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

Reference numeral 1 denotes a working machine main body.
A transmission frame 3 having a transmission (not shown) is fixed to an intermediate portion of the main frame 2 having a hollow pipe-shaped main frame 2 in the left-right direction. Of the input shaft 4 is rotatably projected 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 fixed to each other. 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 suspended 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 a lower end of the elastic plate 26 is attached to the rotary working body 6. 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, at the upper end of the work machine main body 1, that is, at the mission case 3, there is provided a ground leveling body operating mechanism 31 for converting the ground leveling work attitude of the ground leveling mechanism 30 into a scraping work attitude and a soil removal work attitude. Is 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.

Further, 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 first mounting holes 34 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 is provided with 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, a link mechanism for rotating the rake 29 as the terrain body in a vertically interlocking manner about the support shaft 28 is attached to a support shaft 41 pivotally mounted on the upper end of the rotation arm 39. 53 are connected. The link mechanism 53 has a front-rear direction interlocking rod 54 whose one end is rotatably mounted on the support shaft 41 of the rotary arm 39, and the other end of the interlocking rod 54 has a front-rear An intermediate portion of the rotating frame 55 is rotatably mounted on a support shaft 56.

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 integral top plate 55b is provided between 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 at the other end of the left and right side plates 55a by a mounting shaft 60 in a horizontal 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, the connecting frame 66 and the rotating frame
And an urging mechanism for urging the rotating frame 55 upwardly between the rake 29 and the lowering rotation of the rake 29 about the support shaft 28 via the hanging rod 61. 71 are provided.

The urging mechanism 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 an opposed mounting hole 65, and an intermediate portion of the rotating body 76 allows the advancing and retracting rod 73 to move forward and backward. 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.

A spring receiver 81 having a flange 80 and located in front of the rotary body 76 is slidably fitted in the axial direction 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 always urged rearward and upward by the coil spring 83 via the rear spring receiving body 81, and the link which supports the rotating body 76 in a freely rotatable manner. While the rotating frame 55 of the mechanism 53 is urged upward and held upward, the downward rotation about the support shaft 28 of the rake 29 is suppressed via the suspension rod 61. I have.

A top mast in the front-rear direction, that is, a connecting frame 84 is detachably connected to the mounting plate 33 facing the mounting frame 32 so as to cover the terrain body operating mechanism 31. The connection frame 84 includes front and rear opposite connection side plates 85 whose lower ends are respectively engaged with the outer portions of the opposite mounting plates 33 and the opposite connection side plates.
Each of the top plates 85 has a top plate 86 connected between the upper ends thereof, and has 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 attached to 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 detachably 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 while covering 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.

Next, a support frame 91 is fixed to the left and right portions of the reinforcing frame 12, and a rear end of the support frame 91 is supported by a left-right support shaft 92 and a front-rear rotation frame 93. Is vertically rotatably mounted on the lower end of a vertical hanging rod 95 which is rotatably mounted on a rear end of the rotating frame 93 by a horizontal support shaft 94. The leveling plate 27 is rotatably mounted on a horizontal support shaft 96.

Further, between the supporting frame 91 and the turning frame 93, the turning frame 93 is urged upward and held, and the leveling plate 27 is held through the hanging rod 95. Suppression mechanism that suppresses downward rotation when set at a predetermined position
97 are provided. In the figure, 98 is an operation handle of the restraining mechanism 97, 99 is a first stopper of the operation handle 98, 100
Is a second stopper of the operation handle 98, and 101 is a rotation 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.

Further, the left and right connecting arms 23 of the work 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 top link of the tractor is rotatably connected to the distal end of a connecting frame 84 connected to the working machine body 1 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, the 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 burping work. Switching is set.

That is, when the operation handle 52 is turned forward in the scraping operation, the cam body 44 is turned 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. At the same time, the rake 29 is slightly rotated downward about the support shaft 28,
Is switched and set to the substitute working posture in a state of being inclined rearward and downward at a predetermined inclination angle.

During the scraping operation, the coil spring 83 of the urging mechanism 71 provided between the connecting frame 66 and the rotary frame 55 rotates the rotary body 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 suppressing the downward rotation of the rake 29 about the support shaft 28 via the, and the rake 29 is further rotated downward. Is suppressed.

Further, by turning the operation handles 98 of the left and right restraining mechanisms 97 of the work machine main body 1 to perform switching operations, the left and right restraining mechanisms 97 are operated, and the left and right restraining mechanisms 97 are actuated. The leveling plate 27 of the grading mechanism 30 is adjusted and set to a substitute scraping work posture inclined downward and rearward at a predetermined inclination angle in accordance with the substitute work 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 transmission 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 mechanism 71, and the further downward rotation of the rake 29 is suppressed. 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.

Next, at the time of the soil removal operation, 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 rotating arm 39 is rotated downward so as to engage with the first engaging recess 47 of the cam body 44, the link mechanism 53 is rotated by the rotating 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, the rake 29 is set to be switched from a state of the scraping work posture inclined rearward and downward at a predetermined inclination angle to a state of the soil pulling work projecting substantially downwardly below the leveling plate 27 in a substantially vertical state. .

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 reciprocating rod 73 is displaced in a substantially horizontal shape, and is compressed by the coil spring 83 via the rear spring receiver 81 on the rear side. The rotating frame 55 is urged rearward.

Therefore, the cam body 44 of the terrain body operating mechanism 31
The state in which the rotation of the rotating arm 39 is locked and the rake 29 is switched to the soil pulling work posture via the link mechanism 53 is further held by the restraining action of the urging mechanism 71.

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 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 scraping claw 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.

[0066]

According to the first aspect of the present invention, there is provided a leveling body operation having an operation handle at the upper end of a working machine main body for changing a leveling work posture of a leveling body for leveling mud crushed by a rotary working body. A mechanism is provided, and a connection frame having a connection portion connected to a top link of a tractor is detachably attached to a tip end of the work implement body in a state of covering the earth grading body operation mechanism at an upper end portion thereof. Since there is no terrain control mechanism with an operation handle, the connection frame can be easily replaced as necessary, such as according to the type of tractor, and the replacement operation is easy, and the terrain control mechanism switching operation is easy. And, by covering the terrain control mechanism with this connecting frame, it is possible to secure safety when switching the terrain control mechanism. The terrain body does not vibrate during transportation, and the components of the terrain body operation mechanism do not protrude forward, damaging the tractor cabin. A preferable tilling machine can be provided.

According to the second aspect of the present invention, the terrain manipulating mechanism is supported by a mounting frame provided at the upper end of the work machine main body so as to be rotatable in the front-rear direction, and interlocks the terrain body via the link mechanism. A rotating arm that is rotatably supported by the mounting frame in the front-rear direction, and that rotates the rotating arm in the front-rear direction to convert the terrain body into a scraping work posture and a soil removal work posture; And an operation handle fixed to the cam body for rotating the cam body. By rotating the cam body with the operation handle, the grounding body is scraped through the link mechanism, and the working posture and the soil are removed. It is possible to easily and reliably convert and set the pulling posture, and the configuration of the terrain control mechanism is also simple.

According to the third aspect of the present invention, the cam body has the first engagement recessed portion which is removably engaged with the first stopper provided on the rotating arm and the second engagement portion provided on the mounting frame.
Has a second engaging recess slidably engaged with the stopper, and is urged forward by a spring, so that the cam body can be moved by the first stopper and the second stopper. In addition, it is possible to reliably hold the ground preparation body in a state where it is set to the scraping work posture and the soiling work posture.

According to the fourth aspect of the present invention, the connecting frame having the connecting portion at the distal end portion is attached to the mounting frame provided at the upper end portion of the working machine main body with the base end portion covering the terrain body operating mechanism. Since the attachment frame is detachably attached, the connection frame can be easily detachably connected to the attachment frame, and the ground control body operating mechanism can be covered at the base end of the connection frame.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a terrain body operating mechanism of a tillage implement 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 substitute scraping operation.

FIG. 5 is an enlarged side view showing a state in which the earth grading body operation mechanism is switched to a soil removal operation.

FIG. 6 is an explanatory view showing an attached state of the connection frame.

FIG. 7 is an explanatory view showing an attached state of the connecting arm.

FIG. 8 is an exploded perspective view of a part of the control mechanism.

FIG. 9 is a perspective view of the support frame.

FIG. 10 is a side view showing a state in which the above-mentioned ground preparation body is set to a scraping work state.

FIG. 11 is a side view showing a state in which the soil grading body is set to a burping work state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work machine main body 6 Rotary work body 29 Leveling body 31 Leveling body operation mechanism 32 Mounting frame 39 Rotating arm 42 First stopper 44 Cam body 47 First engaging concave section 48 Second engaging concave section 49 Second stopper 50 Spring 52 Operating handle 53 Link mechanism 84 Connecting frame 87 Connecting part

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hirofumi Hoshihara 5155 Shiokawa, Oji, Maruko-cho, Nagano-gun, Nagano Prefecture Inside Matsuyama Corporation (56) References JP-A-6-169604 (JP, A) JP-A-6-169604 86403 (JP, U) Actually open 1953-23707 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01B 35/04 A01B 33/12

Claims (4)

(57) [Claims] 1. A work machine main body having a rotary work body rotatably provided thereon, and a leveling body disposed at a rear portion of the rotary work body of the work machine body for leveling mud crushed by the rotary work body. A ground shaping body operating mechanism provided at an upper end portion of the work implement main body and having an operation handle for changing a ground shaping work posture of the ground shaping body; and an upper end portion of the work machine main body in a state of covering the ground shaping body operating mechanism. And a connecting frame detachably attached to the tractor and having a connecting portion connected to a top link of a tractor that pulls the working machine main body at a tip end thereof. And a turning arm pivotally supported by a mounting frame provided at an upper end portion of the work machine body so as to be rotatable in the front-rear direction, and interlocking the ground adjusting body via a link mechanism. A cam body pivotally supported by the mounting frame so as to be rotatable in the front-rear direction, and rotating the rotary arm in the front-rear direction to convert the terrain body into a scraping work posture and a soil pulling work posture;
The tilling machine according to claim 1, further comprising: an operation handle fixed to the cam body for rotating the cam body. 3. A cam body includes a first arm provided on a rotating arm.
And a second engaging recess slidably engaged with a second stopper provided on the mounting frame, and are forwardly moved by a spring. The tilling work machine according to claim 2, wherein the tilling work machine is rotationally biased toward the tilling machine. 4. A connecting frame having a connecting portion at a distal end portion is detachably attached to an attaching frame provided at an upper end portion of a working machine main body, with a base end portion covering a ground grading body operation mechanism. The tilling work machine according to claim 1, wherein: