JP3286285B2 - 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 a method for tilling and cultivating a paddy field and performing a work for leveling the surface of the crushed soil.

[0002]

2. Description of the Related Art Conventionally, a cultivating machine of this type has a configuration described in, for example, Japanese Patent No. 2735275. In the configuration described in this publication, a rotary is provided on the work machine main body so as to be rotatable, and a terrain body is provided on the work machine main body so as to be rotatable in a vertical direction at a position behind the rotary. A terrain body support rod supporting both sides of the terrain body is provided on the main body so as to be rotatable in the vertical direction and movable forward and backward, respectively, and is fixed to the work machine body in a state where the terrain body is rotated upward. Terrain fixing means is provided.

[0003] The terrain fixing means is provided with a hook rotatably supported by the work implement body for engaging and disengaging a locking portion of a fixed rod fixed to the terrain body, and provided coaxially with the hook. The switching lever is extended between the switching lever and the hook, and the hook is rotated in a direction of engaging with the locking portion of the fixed rod or in a direction of releasing from the hook by rotating the switching lever. And a spring that urges to move.

[0004]

In the configuration described in the above publication, the terrain fixing means is provided on the main body of the working machine separately from the terrain support rods on both sides supporting the terrain, so that the number of parts is reduced. Since there are many, the assembly is troublesome, the production cost is high, and the appearance tends to be deteriorated due to the arrangement of the terrain fixing means on the surface of the work implement body and the terrain.

Further, when fixing the terrain body in a state of turning upward, the terrain body is gripped until the locking portion of the fixed rod provided on the terrain body comes into contact with a hook provided on the work machine body. When the hook is lifted upward and pivoted, the tip of the hook is pressed by the locking portion of the fixed rod, and the hook is pivoted rearward against the spring. When the hook comes off the hook, the hook is returned and turned forward by the urging force of the spring, and the hook is locked by the locking portion and the terrain body is fixed in a state of turning upward. Since the hook must be moved back and forth in the front-rear direction and held on the heavy terrain until it is locked on the locking portion of the fixed rod, there is a problem that it takes time and effort.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to securely fix the terrain body in a state where the terrain body is rotated upward on the terrain body support rod, and to fix the terrain body. It is an object of the present invention to provide a tilling machine that is easy to operate, has a small number of parts, and has a good appearance.

[0007]

According to a first aspect of the present invention, there is provided a tilling work machine having a work machine main body, a rotary provided on the work machine main body, and a vertically rotatable work machine body. A terrain support rod, and a terrain body provided with an engaging portion movably engaged with the terrain body support rod and provided on the working machine body at a position rearward of the rotary so as to be vertically rotatable, An earth fixing body fixing means for fixing the earth adjusting body to the earth adjusting body supporting rod, wherein the earth adjusting body supporting rod fixes the earth adjusting body in a state where the earth adjusting body is turned upward. Wherein the terrain body fixing means comprises: an engagement support frame engaged with an engagement portion of the terrain body; a switching lever rotatably supported by the engagement support frame; A fixing pin which is provided on the frame so as to be able to advance and retreat, and which is detachably engaged with an upper fixing portion of the terrain support rod. Those having, a spring for biasing in a direction to separate the fixing pin from the upper direction to engage the fixed part or the upper fixing section by the rotation operation of the switching lever.

In order to fix the terrain body in a state of being turned upward, when the switching lever is turned in one direction, the biasing direction of the spring is changed by the turning of the switching lever, The fixing pin is advanced toward the terrain support rod by the spring, and the tip of the fixed pin is brought into contact with the terrain support rod.

In this state, when the terrain body is lifted with both hands, the terrain body is rotated upward around the work machine body, and the terrain body support rod is operated at the engaging portion of the terrain body. The engagement part of the terrain body is moved forward along the terrain body support rod along the terrain body support rod while being pushed upward about the machine body.

[0010] Further, by moving the engaging portion of the terrain body, the terrain body is rotated upward from the rear position of the rotary. When the engaging portion of the terrain body is moved, the tip of the fixing pin is moved along the terrain body support.

When the tip of the fixing pin is moved to the upper fixing portion formed on the terrain support rod by the movement of the engaging portion of the terrain body, the tip of the fixing pin is moved upward by the urging force of the spring. The terrain body is securely fixed to the upper fixing part of the terrain body support rod in a state where the terrain body is rotated upward from the rear position of the rotary by the fixing pin and the upper fixing part. You.

Then, the rear of the rotary is opened to replace the rotary tilling claw, to remove the mud adhering to the rotary tilling claw and the weeds entangled with the tilling claw, and to rotate upward. Work such as removal of mud adhering to the lower surface of the terrain body fixed in the laid state is facilitated.

Next, to release the fixation of the terrain fixed in a state of turning upward, when the switching lever is rotated in the other direction, the rotation of the switching lever causes the spring to rotate. The urging direction is changed, and the fixing pin is urged by the spring in a direction away from the upper fixing portion of the terrain support rod.

However, the engaging frame is pushed in the axial direction by the engaging portion due to the weight of the terrain body, and the fixing pin provided on the engaging frame is axially moved to the upper fixing portion of the terrain body supporting rod. The fixing pin is pressed and does not move backward in the direction away from the upper fixing portion due to friction with the upper fixing portion.

Therefore, when the terrain body is moved up with both hands, the friction between the fixing pin and the upper fixing portion is reduced by the urging force of the spring, and the fixing pin is moved above the terrain body supporting rod by the urging force of the spring. It is retracted in the direction away from the fixing part, and the fixing of the terrain body is released.

Therefore, it is easy to fix the terrain body to the terrain body support rod while the terrain body is rotated upward, and to release the fixing of the terrain body.

According to a second aspect of the present invention, in the tilling implement of the first aspect, the terrain support rod pivots the terrain body downward, and grounds a lower end of the terrain body to cultivate. It has a lower fixing portion for fixing the terrain body while supporting the work implement, and a fixing pin is removably engaged with the lower fixing portion of the terrain body support rod.

When fixing the terrain in a state where the lower end of the terrain is grounded and the tilling machine is supported,
When the terrain is fixed to the upper fixing part of the terrain support rod and the terrain is pressed down with both hands,
The engaging portion of the terrain body is moved in the axial direction along the terrain support rod, and the fixing pin of the engaging support frame engaged with the engaging portion is disengaged from the position of the upper fixing portion and axially moves. Be moved.

In this state, when the switching lever is rotated in one direction in the same manner as the operation for fixing the terrain body to the upwardly rotated state, the rotation of the switching lever causes The biasing direction of the spring is changed, and the fixing pin is advanced toward the terrain support rod by the spring, and the tip of the fixing pin is brought into contact with the terrain support rod.

In this state, when the terrain body is further depressed with both hands, the terrain body is pivoted downward around the work equipment body, and the terrain body support rod is engaged with the engaging portion of the terrain body. The engagement portion of the terrain body is moved rearward along the terrain body support rod along the terrain body support rod while being pushed downward about the work implement body.

Further, by moving the engaging portion of the terrain body, the terrain body is positioned behind the rotary. When the engaging portion of the terrain body is moved, the tip of the fixing pin is moved along the terrain body support.

When the tip of the fixing pin is moved to the lower fixing portion formed on the terrain body support rod by the movement of the engaging portion of the terrain body, the tip of the fixing pin is leveled by the urging force of the spring. The ground fixing body is engaged with the lower fixing portion of the body support rod, and the terrain is positioned behind the rotary with the fixing pin and the lower fixing portion,
With the lower end of the terrain body grounded, the terrain body is securely fixed to the lower fixing portion.

The tillage implement is supported by the ground preparation and the rotary, and the tillage implement is supported in a stable posture without overturning.

According to a third aspect of the present invention, there is provided the tilling implement according to the first or second aspect, wherein the upper fixing portion and the lower fixing portion are formed by fixing pin insertion holes opened on the peripheral surface of the terrain support rod. Each of the engagement support frames has a fixed pin guide hole communicating with the fixed pin insertion hole, and a fixed pin inserted into the fixed pin insertion hole is inserted into the fixed pin guide hole so as to be able to advance and retreat. Is what is being done.

Then, the engaging portion of the terrain body is moved along the terrain body supporting rod toward the front or rear of the terrain body supporting rod, and the fixing pin guide of the engaging support frame engaged with the engaging portion is provided. When the hole communicates with the fixing pin insertion hole of the upper fixing portion or the lower fixing portion formed in the terrain support rod, the fixing pin inserted into the fixing pin guiding hole by the urging force of the spring is moved from the fixing pin guiding hole to the fixing pin. It is inserted into the insertion hole.

Further, the fixing pin is inserted from the fixing pin guide hole into the fixing pin insertion hole, so that the terrain body is rotated upward or downward by the fixing pin and the fixing pin insertion hole. In a state where the tilling work machine is supported with the lower end of the terrain body grounded and grounded, the terrain body is securely fixed to the upper fixing portion or the lower fixing portion of the terrain body support rod, respectively.

Next, when the urging direction of the spring changes while the fixing pin is inserted into the fixing pin insertion hole of the upper fixing part or the fixing pin insertion hole of the lower fixing part, the fixing pin is moved by the spring. It is urged in a direction away from the inside of the fixing pin insertion hole of the upper fixing portion or the lower fixing portion of the terrain support rod.

However, due to the weight of the terrain body, the fixing pin is pressed from the axial direction into the fixing pin insertion hole of the upper fixing portion or the lower fixing portion of the terrain body supporting rod, and the fixing pin is frictionally rubbed with the fixing pin insertion hole. It does not retreat in the direction away from the fixing pin insertion hole.

Then, when the leveling body is moved up with both hands, the friction between the fixing pin and the fixing pin insertion hole becomes smaller than the urging force of the spring, and the fixing pin is moved from the fixing pin insertion hole by the urging force of the spring. It is retracted in the direction of separation.

Then, the fixing of the terrain body in a state where the terrain body is rotated upward or downward and the lower end of the terrain body is grounded and the tilling work machine is supported is released. You.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 denotes a tilling work machine.
As shown in FIGS. 1 and 2, a work machine main body 2, a rotary 3 provided on the work machine main body 2, and a terrain support rod 4 provided on the work machine main body 2 so as to be rotatable in a vertical direction.
And a grading body 5 that is provided on the work machine main body 2 behind the rotary 3 so as to be rotatable in the vertical direction and that is movably engaged with the terrain body supporting rod 4. And a terrain fixing means 7 for fixing to the body support rod 4.

The working machine body 2 is shown in FIGS.
As shown in FIG. 6, a hollow pipe-shaped main frame 8 having a longitudinal direction in the left-right direction with respect to the traveling direction of the tilling work machine 1 is provided. Left and right brackets 9 whose upper and lower sides are longitudinal directions are fixed to both ends of the main frame 8, respectively, and a transmission case 10 is fixed to an outer surface of a left bracket 9 of these brackets 9.

A transmission device 11 is provided at an intermediate portion of the main frame 8. This mission device 11
Has an input shaft rotated by the output from the PTO shaft of the tractor, and an output shaft rotated in conjunction with the rotation of the input shaft. The output shaft is rotatably supported in the main frame 8. One end of the output shaft projects from the upper end of the transmission case 10.

Further, a top mast 12 protruding forward is attached to an upper portion of the transmission device 11,
A connecting pin 13 is attached to the tip of the top mast 12. Further, lower arms 14 protruding forward are attached to both sides of the main frame 8 located on both sides of the transmission device 11, and lower pins are attached to the distal ends of these lower arms 14, respectively. The connection pin 13 and the left and right lower pins constitute a three-point connection portion.

Further, brackets 15 are respectively fixed to upper portions on both sides of the main frame 8 at both sides of the lower arms 14 on both sides. Further, both ends of the rotary cover 16 are fixed below the main frame 8 and between upper portions of the left and right brackets 9 respectively. The rotary cover 16 is formed in a protruding arc shape protruding toward the main frame 8, and connecting pieces 17 protruding from upper portions on both sides of the protruding arc portion are fixed to the rear ends of the lower arms 14 on both sides. Have been.

Next, the rotary 3 is rotatably provided between the lower end of the right bracket 9 and the lower end of the transmission case 10. The rotary 3 has a tilling shaft 18 whose axial direction is the left-right direction, and tilling claws 19 radially attached to the tilling shaft 18 at intervals in the axial direction. One end of the tilling shaft 18 is rotatably supported at the lower end in the transmission case 10, and the other end of the tilling shaft 18 is rotatably supported at the lower end of the right bracket 9.

Further, one end of the output shaft protruding from the upper end in the transmission case 10 and one end of the tilling shaft 18 are operatively connected by an interlocking medium provided in the transmission case 10, The rotary 3 is driven to rotate by rotation of the output shaft.

Next, as shown in FIG. 6, the terrain support rods 4 include two terrain support rods 4 arranged on both sides of the main frame 8, respectively. The terrain support rods 4 on both sides are each formed by a hollow pipe body having an axial direction in the front-rear direction, and the front end portion is defined by the bracket 15 fixed to both side portions of the main frame 8 such that the left-right direction is the axial direction. The supporting shafts 20 are supported so as to be rotatable vertically.

As shown in FIGS. 1 and 2, the terrain body 5 is fixed to the terrain body support rod 4 in a state where the terrain body 5 is rotated upward from behind the rotary 3. An upper fixing part 21 and a lower fixing part which turns the terrain body 5 downward, grounds a lower end part 6 of the terrain body 5 and fixes the terrain body 5 in a state where the tilling work machine 1 is supported. And a portion 22. And the upper fixing portion
Reference numeral 21 is formed at a substantially middle portion of the terrain support rod 4 in the front-rear direction, and the lower fixing portion 22 is formed near the rear end of the terrain support rod 4 in the front-rear direction.

The upper fixing portion 21 and the lower fixing portion 22 are respectively formed by fixing pin insertion holes 23 opened on the peripheral surfaces of the grounding body support rods 4 on both sides. And
Each of the fixing pin insertion holes 23 is formed to penetrate the left and right terrain support rods 4 in the radial direction.

Next, as shown in FIG. 6, the grading body 5 is attached to a rear end of the rotary cover 16 by a hinge 24 so as to be vertically rotatable. This terrain 5
Is a leveling plate 25 located behind the rotary 3 and side end plates 26 formed at both end portions of the leveling plate 25, respectively.
And a mounting support frame 28 having left and right reinforcing and combined mounting plates 27 fixed to the upper sides on both sides of the leveling plate 25 and having the longitudinal direction as a longitudinal direction for reinforcing the leveling plate 25, and the left and right mounting plates 27. And an engaging portion 29 rotatably supported at an upper end portion and movably engaged with the terrain body supporting rod 4.

Then, the lower end 6 of the grading body 5 is formed by the lower end of the grading plate 25 and the lower end of the side end plate 26 at both side ends.
Are formed. As shown in FIGS. 3 and 5, the engaging portion 29 is formed of a columnar engaging body 29a having a longitudinal direction in the left-right direction, and both ends of the engaging body 29a are attached to the left and right mounting plates. An insertion hole 30 is rotatably supported at the upper end of the engaging member 29, and an insertion hole 30 through which the terrain body supporting rod 4 is movably inserted is formed in an intermediate portion of the engaging body 29a.

As shown in FIGS. 1 and 2, a stopper 31 is attached to the rear end of the terrain support rod 4 inserted through the insertion hole 30 of the engaging portion 29, and one end of the stopper 31 is attached to the stopper 31. The first coil spring 32a is contacted with the ground control body support rod 4. The stopper 31 and the first coil spring 32a prevent the terrain support rod 4 from coming off the engaging portion 29.
In addition, a second coil spring 32b is mounted on the terrain support rod 4 in front of the engaging portion 29.

Next, as shown in FIGS. 3 to 5, the terrain body fixing means 7 includes an engaging support frame 33 engaged with the engaging portion 29 of the terrain body 5 and an engaging support frame 33. A switching pin 35 rotatably supported by 33, a fixing pin 36 provided on the engaging support frame 33 so as to be able to advance and retreat, and removably engaged with the upper fixing portion 21 of the terrain body supporting rod 4; A spring 38 that urges the fixing pin 36 in a direction of engaging the upper fixing portion 21 or in a direction of separating the fixing pin 36 from the upper fixing portion 21 by rotating the switching lever 35.

Further, the ground fixing body fixing means 7 includes a pin support 37 having the fixing pin 36 rotatably supported by a shaft support 34 of the switching lever 35 supported by the engagement support frame 33. The fixing pin 36 is detachably engaged with the lower fixing portion 22 of the terrain support rod 4.

The engaging support frame 33 includes a frame body 39,
A support projection 40 projecting upward from the frame body 39
And a guide body 41 provided in the frame main body 39, and further, the engagement support frame 33 has a fixed pin guide hole 49 communicating with each of the fixed pin insertion holes 23. .

The frame main body 39 is formed between the front and rear mounting plate portions 42 engaging the front and rear of the engaging portion 29 and the upper end of the mounting plate portion 42 and is engaged with the upper surface of the engaging portion 29. Support plate 43
And is formed in an inverted U-shape. In addition, insertion holes 44 are formed in the front and rear mounting plate portions 42 so as to communicate with the insertion holes 30 of the engagement portions 29 and to insert the terrain body support rod 4 so as to be able to advance and retreat.

The support projection 40 is provided on the support plate 43.
Projecting upwards from both sides of the
In the upper portions of the support projections 40 on both sides, insertion holes 45 are formed, which are rotatably inserted into the shaft support portions 34 of the switching lever 35 and supported.

The switching lever 35 is positioned above and below the through-hole 45 on one of the supporting projections 40 on both sides, and the switching lever 35 is turned upward to rotate this switching lever. By rotating the upper stopper 46 for receiving the switching lever 35 and the switching lever 35 downward, the lower stopper 47 for receiving the switching lever 35 is projected in a direction orthogonal to the one-side support projection 40. .

The guide body 41 is formed in a prismatic shape with the longitudinal direction being the longitudinal direction, and is fixed to the mounting plate portion 42 on the rear side of the frame body 39. A rectangular insertion hole 48 communicates with an insertion hole 44 formed in the lower mounting plate portion 42 at a lower portion of the guide body 41, and the terrain body support rod 4 is inserted so as to be able to advance and retreat.
The fixed pin guide hole 49 is formed through the center of the guide body 41, and the fixed pin 36 inserted into the fixed pin insertion hole 23 can be advanced and retracted in the fixed pin guide hole 49. Has been inserted.

Next, the switching lever 35 is formed in a crank shape with a round bar, and has a shaft support 34 formed at one end thereof and supported by the insertion holes 45 of the support projections 40 on both sides. An operation unit 50 is formed at the other end. A stop ring 51 is attached to an end of the shaft support 34 in a state where the shaft support 34 is supported by the insertion holes 45 of the support protrusions 40 on both sides.

Next, the pin support 37 is located between the support projections 40 on both sides and is rotatably supported by the support 34 of the switching lever 35 on both sides. It has a top plate portion 53 formed between the upper end portions of the shaft support plate portions 52 on both sides, and is formed in an inverted U-shape whose longitudinal direction is the longitudinal direction.

An insertion hole 54 is formed at the front end side of the pivot support plate 52, through which the pivot support 34 of the switching lever 35 is inserted, and the pin support 37 is vertically moved around the pivot support 34. It is designed to be turned. Further, pin support slots 56 for supporting both ends of the mounting pin 55 movably in the front-rear direction are formed at the rear end side of the shaft support plate section 52, and both ends of the pin support slots 56 on both sides are formed. The fixed pin 36 inserted into the fixed pin guide hole 49 is rotatably mounted on the supported mounting pin 55.

Next, a large-diameter head 57 is formed at the upper end of the fixing pin 36, and a pin insertion hole 58 through which the mounting pin 55 is inserted is formed in the large-diameter head 57, and this pin insertion hole 58 is formed. The fixing pin 36 is rotated about the center.

Next, a spring support projection 59 is protruded from a middle portion of the switching lever 35 in a direction crossing the switching lever 35. Further, the spring support projection 60 is located at a substantially middle portion in the front-rear direction on the one side support plate portion 52 of the pin support 37, and the spring support protrusion 60 is arranged in a direction crossing the one support plate portion 52. It projects in the same direction as the part 59.

Next, the spring 38 is formed by a coil spring, one end of which is supported by a spring supporting projection 59 protruding from the switching lever 35, and which protrudes from the one shaft supporting plate 52. The other end is supported by the spring support projection 60 thus provided, and is stretched between the switching lever 35 and the pin support 37.

When the switching lever 35 is rotated downward, the biasing direction of the spring 38 is changed, and the pin support 37 is rotated by the spring 38 about the pivot 34 of the switching lever 35. While being rotated, the fixing pin 36 pivotally supported by the pin support 37 is urged in a direction in which the fixing pin 36 engages with the upper fixing portion 21 or the lower fixing portion 22. Then, in a state where the switching lever 35 is received by the lower stopper 47, the fixing pin 36 advances from the fixing pin guide hole 49 and enters the fixing pin insertion hole 23 formed in the terrain body support rod 4. It is to be inserted.

When the switching lever 35 is turned upward, the biasing direction of the spring 38 is changed, and the pin support 37 is rotated by the spring 38 about the pivot 34 of the switching lever 35. While being rotated, the fixing pin 36 pivotally supported by the pin support 37 is
Alternatively, it is urged in a direction to separate from the lower fixing portion 22. And the switching lever
The fixing pin 36 is retracted into the fixing pin guide hole 49 from the inside of the fixing pin insertion hole 23 formed in the terrain body support rod 4 in a state where 35 is received by the upper stopper 46. I have.

Reference numerals 61 denote grounding wheels provided on support arms 62 projecting forward from both sides of the work machine main body 2 so as to be vertically adjustable.

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

When fixing the terrain body 5 to the upper fixing portion of the terrain body support rod 4 in a state where the terrain body 5 is rotated upward from behind the rotary 3, the terrain body fixing means 7 on both sides is used.
The switching lever 35 provided at the position shown in FIG.
When each of them is turned downward as shown by the solid line, the springs 38
The biasing directions of the springs 38
The pin support 37 is pivoted downward about the shaft support 34 of the switching lever 35 in the direction in which the engaging pin 36 is engaged with the upper fixing portion 21, and provided on the pin support 37 on both sides. The fixed pins 36 are respectively advanced toward the terrain support rod 4, and the distal ends of the fixed pins 36 on both sides of the fixed pins 36 are respectively in contact with the terrain support rod 4.

In this state, when the leveling body 5 is lifted with both hands, the leveling body 5 is turned upward around the hinge 24 attached to the rear end of the rotary cover 16, and the leveling is performed. The terrain support rods 4 are respectively pushed up by the engagement portions 29 provided on both sides of the body 5, and the terrain support rods 4 are respectively raised upward around the support shafts 20 of the brackets 15 on both sides of the main frame 8. It is turned.

The terrain support rods 4 are respectively pushed upwards around the support shafts 20 by the engaging portions 29 on both sides of the terrain body 5, along the terrain support rods 4. Are moved toward the front of the terrain support rod 4, respectively. In addition, by moving the engaging portions 29 on both sides, the terrain body 5 is moved upward from the rear position of the rotary 3, and by moving the engaging portions 29 on both sides, the tip end of the fixing pin 36 is moved. Each of them is moved along the support 4.

Further, by the movement of the engaging portions 29 on both sides, the fixing pin guide holes 49 of the engaging support frames 33 engaged with the engaging portions 29 are moved to the upper fixing portions 21 formed on the ground-control body supporting rod 4. Fixed pin insertion hole
23, the fixing pin guide holes 49 communicate with the fixing pin insertion holes 23 of the upper fixing portion 21 respectively. When the urging force of the spring 38, the fixing pins 36 inserted into the fixing pin guide holes 49 are fixed. In a state in which the ground preparation body 5 is advanced upward from the rear position of the rotary 3 by the fixing pins 36 and the fixing pin insertion holes 49, each of which extends from the guide hole 49 and is inserted into the fixing pin insertion hole 23. It is fixed to the upper fixing part 21.

The rear of the rotary 3 is largely opened as shown in FIG. 1 by fixing the terrain body 5 to the upper fixing portion 21 which is rotated upward, and the plow of the rotary 3 Rotary 3 for removing mud adhering to 19
Of the rotary cover 16 such as maintenance and inspection of the rotary cover 16 and removal of the mud attached to the rotary cover 16, It becomes easy to perform maintenance and inspection of the leveling body 5 such as removal of the ground.

Next, the terrain body 5 is turned downward, the lower end portion 6 of the terrain body 5 is grounded, and the terrain work implement 1 is supported. Fixed part
In order to fix the switching levers 22 on the two sides, the switching levers 35 provided on the ground fixing means 7 on both sides are turned upward from the state shown by the solid line in FIG. 5 as shown by the chain line in FIG. By the rotation of 35, the urging directions of the springs 38 change, and these springs 38 fix the fixing pins 36.
Are urged in the direction away from the upper fixing portion 21 of the terrain support rod 4, respectively.

However, the engaging portions 29 on both sides are not
The support frame 33 is pushed in the axial direction by
Are fixed to the upper fixing portion 21 of the terrain support rod 4 from the axial direction.
Does not retreat in the direction away from the fixing pin insertion hole 23 due to friction with the fixing pin insertion hole 23.

Then, when the leveling body 5 is moved up with both hands, the friction between the fixing pin 36 and the fixing pin insertion hole 23 of the upper fixing portion 21 is reduced by the urging force of the spring 38 and the spring 38 The fixing pin 36 is moved upward by the urging force.
Are respectively receded toward the direction away from the inside of the fixing pin insertion hole 23, and the fixing of the ground preparation body 5 is released.

When the terrain body 5 is slightly depressed with both hands in a state where the terrain body 5 is released, the fixing pins 36 on both sides are moved in the axial direction, and the fixing pin insertion holes 23 of the upper fixing part 21 are moved. From each of the positions.

In this state, when the terrain body 5 is further depressed with both hands, the terrain body 5 is pivoted downward about the hinge 24 attached to the rear end of the rotary cover 16, and Engagement parts 29 provided on both sides of the ground preparation body 5
Then, the terrain support rods 4 are pressed down, and these terrain support rods 4 are respectively turned downward about the support shafts 20 of the brackets 15 on both sides of the main frame 8.

The terrain support rods 4 are pushed down by the engaging portions 29 on both sides of the terrain body 5 around the support shafts 20, respectively. Are moved toward the rear of the terrain support rod 4 respectively. In addition, by moving the engaging portions 29 on both sides, the terrain body 5 is moved rearward from the position above the rotary 3, and by moving the engaging portions 29 on both sides, the tip end of the fixing pin 36 is moved. Each of them is moved along the support 4.

When the engaging portions 29 on both sides of the terrain body 5 are moved, the fixed pin guide holes 49 of the engaging support frames 33 engaged with these engaging portions 29 are formed on the lower side of the terrain body supporting rod 4. When the fixed pin guide holes 49 are respectively moved to the fixed pin insertion holes 23 of the fixed portion 22 and communicate with the fixed pin insertion holes 23 of the lower fixed portion 22, respectively, they are inserted into the fixed pin guide holes 49 by the urging force of the spring 38. The fixed pin 36 that has been advanced from the fixed pin guide hole 49 and is inserted into the fixed pin insertion hole 23, respectively, and the terrain body 5 is positioned behind the rotary 3 by the fixed pin 36 and the fixed pin insertion hole 49. With the lower end 6 of the terrain body 5 grounded and the tilling machine 1 supported, the terrain body 5 is fixed to the lower fixing part 22.

Then, by fixing the terrain body 5 to the lower fixing portion 22, the tilling machine 1 is supported by the terrain body 5 and the rotary 3 in a stable posture without falling down as shown in FIG. Is done.

Next, when performing the leveling work with the leveling body 5, the switching lever 35 is rotated in the same manner as when releasing the fixing of the leveling body 5 from the state where the leveling body 5 is turned upward. By operating the fixing pins 36 on both sides, the fixing pin guide holes 49 from the fixing pin insertion holes 23 of the lower fixing portions 22 on both sides respectively.
And the fixing of the terrain body 5 fixed to the lower fixing portion 22 with the lower end portion 6 of the terrain body 5 grounded is released.

Further, by lifting the terrain body 5 with both hands, the engaging portions 29 on both sides of the terrain body 5 are moved forward along the terrain body supporting rods 4 on both sides, respectively. The fixing pins 36 of the engaging support frame 33 engaged with the parts 29 are respectively moved in the axial direction, and come off from the fixing pin insertion holes 23 of the lower fixing part 22.

Then, as shown in FIG. 7, one ends of the second coil springs 32b mounted on the terrain support rods 4 on both sides abut against the front mounting plate portions 42 of the engaging support frames 33, respectively. In this state, the stoppers 63 with which the other ends of the second coil springs 32b are in contact are fixed at predetermined positions of the terrain body support rods 4 on both sides, respectively.
At b, the terrain body 5 movably engaged with the engaging portions 29 on the terrain body support rods 4 on both sides is urged to the terrain state.

Next, the three-point connecting mechanism (the top mast 12 and the lower arms 14 on both sides) of the working machine body 2 is connected to the three-point connecting mechanism of the tractor, and the transmission device 11 is connected to the PTO shaft of the tractor via a power transmission shaft. Connect the input shaft of. Also,
The height of the grounding wheels 61 provided on both sides of the work machine body 2 is adjusted to adjust the depth of the rotary 3.

Next, when the tilling work machine 1 is towed by the tractor and the input shaft of the transmission 11 is rotated by the output from the PTO shaft of the tractor, the rotation of the input shaft causes the transmission 11 to rotate. Is rotated, and the output from this output shaft drives the rotary 3 via an interlocking medium provided in the transmission case 10.

The soil is sequentially plowed by each of the tilling claws 19 of the rotary 3, and the cultivated soil is carried along the rotary cover 16 by the rotation of each of the tilling claws 19 of the rotary 3, so that the soil preparation body 5 is formed. And the cultivated soil is sequentially leveled by the leveling body 5.

When the cultivated soil is leveled by the terrain body 5, the engaging portions 29 on both sides of the terrain body 5 are moved by the second coil springs 32b mounted on the terrain body support rods 4 on both sides. Is urged toward the direction located behind the rotary 3, so that the terrain body 5 does not rotate upward of the rotary 3 even if the terrain body 5 receives earth pressure. Cultivated soil is leveled in order at.

Next, in the above-described embodiment, on both sides of the terrain body 5, there are provided engaging portions 29 movably engaged with the terrain body supporting rod 4, respectively. Support frame 33
Through holes formed in the engaging portion 29 in the mounting plate portion 42 before and after
The insertion holes 44 communicating with the insertion holes 30 are formed in the guide body 41 provided in the engagement support frame 33, respectively.
The terrain body fixing means 7 can be easily attached to the engaging portions 29 on both sides of the terrain body 5 by inserting the terrain body supporting rods 4 into the 0, 44, and 48, respectively. The terrain fixing means 7 can be easily attached to the joint 29, respectively.

Further, with the terrain fixing means 7 attached to the engaging portions 29 on both sides of the terrain 5, the insertion holes 30, 4 on both sides are provided.
By pulling out the terrain support rods 4 from the respective tractors 4 and 48, the terrain body fixing means 7 can be easily removed from the engaging portions 29 on both sides of the terrain body 5.

Next, in each of the above embodiments,
Although the engagement support frame 33 engaged with the engagement portions 29 on both sides of the engagement portion 29 has a configuration including the front and rear mounting plate portions 42 in which the insertion holes 44 communicating with the insertion holes 30 of the engagement portions 29 are formed. Not limited to this configuration, the engagement support frame 33 may be configured to engage with the engagement portion 29 without forming the insertion hole 44 communicating with the insertion hole 30 of the engagement portion 29, For example, a configuration in which an engagement support frame 33 is fixed to the engagement portion 29 may be employed.

In each of the above embodiments, the fixing pin 36 of the pin support 37 provided on the terrain fixing means 7 is provided with the engaging support frame.
The configuration in which the guide body 41 provided in 33 is inserted into the fixed pin guide hole 49 of the guide body 41 so as to be able to advance and retreat has been described.
The fixing pin 36 of the pin support 37 is fixed to the fixing pin insertion hole 23 or the lower fixing part 22 of the upper fixing part 21 formed on the terrain support rod 4 without being inserted into the fixing pin guide hole 49 so as to be able to advance and retreat. The pin may be inserted into the pin insertion hole 23 so that it can be inserted and removed.

Next, in each of the above embodiments, the terrain 5
Engaging support frames provided on the terrain fixing means 7 at the engaging portions 29 on both sides of the
The fixing pins 36 provided on the terrain body fixing means 7 on both sides are fixed to the fixing pin insertion holes 23 or the lower fixing parts 22 of the upper fixing portion 21 formed on the terrain body supporting rods 4 on both sides. The configuration in which the pin is inserted into the pin insertion hole 23 so as to be able to be inserted and removed has been described. However, the present invention is not limited to this configuration. Engage,
The fixing pin 36 provided on the one-side terrain body fixing means 7 is inserted into the fixing pin insertion hole 23 of the upper fixing portion 21 or the fixing pin insertion hole 23 of the lower fixing portion 22 formed on the one side terrain body supporting rod 4. A configuration that allows insertion and removal is possible.

Next, in each of the above embodiments, the upper fixing portion 21 and the lower fixing portion 22 formed on the terrain support rod 4
The configuration in which the fixing pin 36 is formed by the fixing pin insertion hole 23 through which the fixing pin 36 is removably inserted has been described, but is not limited to this configuration.
The upper fixing portion 21 and the lower fixing portion 22 may be formed by engaging recesses with which the fixing pins 36 are removably engaged.

Next, in each of the above embodiments, the fixing pin
A pin support 37 provided with a pivot 36 is rotatably supported on a shaft support 34 of the switching lever 35, and the switching lever 35 and the pin support 37 are rotatably supported.
Although the configuration in which the spring 38 for urging the fixing pin 36 is stretched between the above and the above has been described, the present invention is not limited to this configuration. Then, the fixing pin 36 may be biased in a direction of engaging with the upper fixing portion 21 or the lower fixing portion 22 or in a direction of separating from the upper fixing portion 21 or the lower fixing portion 22.

In the case of this configuration, for example, the engagement support frame 33
A mounting shaft is provided on the mounting shaft, a spring is mounted on the mounting shaft, one end of the spring is engaged with the switching lever 35, and the other end of the spring is connected to the fixing pin.
Engage with 36.

Then, the urging direction of the spring is changed by the turning operation of the switching lever 35, and the direction in which the fixing pin 36 engages with the upper fixing part 21 or the lower fixing part 22 by this spring or the upper fixing part 21 or lower fixing part
It is urged away from 22.

According to this configuration, the fixing pin 36 can be provided on the engagement support frame 33 so as to be able to advance and retreat without using the pin support 37, so that the number of components is small and the configuration of the grounding body fixing means 7 is simple. Become.

[0092]

According to the first aspect of the present invention, in the state where the terrain body is turned upward using the existing terrain body support rod, the terrain body is securely attached to the upper fixing portion of the terrain body support rod. It can be fixed, the number of parts of the terrain fixing means is small and the configuration is simple,
The terrain body support rod is provided with terrain body fixing means for securing the terrain body to the terrain body support rod, so that the appearance is good. Further, the direction in which the fixing pin is engaged with the upper fixing portion by a spring by rotating the switching lever, or the upper side fixing direction. When the ground adjustment body is rotated in a state of being urged in a direction of separating from the part, the fixing pin is disengaged from the upper fixing part, so that the heavy earth adjustment body can be easily fixed and the operation of releasing the fixing can be easily performed.

According to the second aspect of the present invention, the terrain body is turned downward by the terrain body fixing means, the lower end of the terrain body is grounded, and the tilling machine is supported in a state where it is supported. By fixing the tilling implement to the lower fixing portion of the terrain support rod, the tilling implement can be reliably supported in a stable posture without falling down when the tilling implement is not operated.

According to the third aspect of the present invention, when the fixing pin guide hole of the engagement support frame communicates with the fixing pin insertion hole of the upper fixing portion or the lower fixing portion, the fixing pin is moved by the urging force of the spring. From the fixed pin insertion hole, the fixed pin and the fixed pin insertion hole can be securely fixed in a state where the terrain body is turned upward or a state where the tilling work machine is supported, respectively, and Is fixed in a state where it is turned upward, the rear of the rotary is opened, and maintenance and inspection of the rotary can be performed.
By fixing the terrain body with the lower end of the terrain body grounded, the tilling machine during non-working can be reliably supported in a stable posture without falling down.

[Brief description of the drawings]

FIG. 1 is a side view of a tillage implement in a state in which a ground preparation body according to an embodiment of the present invention is fixed at a first fixed position.

FIG. 2 is a side view of the tilling machine in a state where the terrain is fixed at a second fixing position.

FIG. 3 is an exploded perspective view of the ground adjustment body fixing means.

FIG. 4 is a cross-sectional view showing a state where the earth-fixing body fixing means is assembled.

FIG. 5 is an explanatory view of the operation of the above-mentioned ground adjustment body fixing means.

FIG. 6 is a plan view of the tilling work machine.

FIG. 7 is a side view of the tillage implement in the same leveling operation state.

[Explanation of symbols]

 2 Work implement body 3 Rotary 4 Earth support body 5 Earth support body 6 Lower end part 7 Earth support body fixing means 21 Upper fixing part 22 Lower fixing part 23 Fixed pin insertion hole 29 Engagement part 33 Engagement support frame 35 Switching lever 36 Fixation pin 37 Pin support 38 Spring 49 Fixed pin guide hole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01B 35/04 A01B 35/12

Claims (3)

(57) [Claims] A work implement main body, a rotary provided on the work implement main body, a terrain body support rod provided on the work implement main body so as to be rotatable in a vertical direction, and the rotary provided on the work implement main body. A terrain body that is provided at the rear and is rotatably provided in the vertical direction and that has an engaging portion movably engaged with the terrain body support rod; and a terrain body that fixes the terrain body to the terrain body support rod. Fixing means, wherein the terrain support rod has an upper fixing portion for fixing the terrain in a state where the terrain is turned upward, and the terrain fixing means comprises: An engagement support frame engaged with the engagement portion, a switching lever rotatably supported by the engagement support frame, and an upper portion of the terrain body support rod provided on the engagement support frame so as to advance and retreat. A fixing pin which is detachably engaged with the fixing portion; A spring that urges a fixed pin in a direction of engaging the upper fixed portion or in a direction of separating the fixed pin from the upper fixed portion. 2. The terrain support rod has a lower fixing portion for rotating the terrain body downward, grounding a lower end portion of the terrain body, and fixing the terrain body in a state where the tilling work machine is supported. And
The tilling machine according to claim 1, wherein a fixing pin is removably engaged with a lower fixing portion of the terrain support rod. 3. An upper fixing portion and a lower fixing portion are respectively formed by fixing pin insertion holes opened on the peripheral surface of the terrain support rod, and the engaging support frames are respectively fixed to the fixing pin insertion holes. The tilling machine according to claim 1, further comprising a pin guide hole, wherein a fixing pin inserted into the fixed pin insertion hole is inserted into the fixed pin guide hole so as to be able to advance and retreat.