JPH11308901A - Soil leveling device of rotary tiller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To resolve a problem such as an instable attitude of a leveling device in a rear part and hardly performable a smooth leveling work when the leveling device is fitted to the rear part of a rotary tiller in one body. SOLUTION: This soil leveling device of a rotary tiller hangs a rear cover 4 fitted to a rear part of a main cover 2 covering over a rotary rotor 1 through a rubber plate to a machine frame with right and left hanging plates 6, and further, a front end part of a leveler 7 is swingably fitted to a bottom end part of the rear cover 4 and a central part of the leveler 7 is connected to the machine frame with a broken-type connecting tool 12, then the connecting tool 12 is vertically operated to make the leveler 7 controllable to a state among a self-weight hanging position, a pressed hanging position and a reducing- pressurized hanging position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for leveling a rotary tiller. The present invention relates to a rear cover that covers the rear of a rotary cultivator, and a support device for a leveler attached to a rear edge of the rear cover, and more specifically, a rear cover attached to the rear of a main cover that covers an upper part of the rotary cultivator. Leveler gives priority to leveling performance,
The present invention relates to a device that prioritizes soil movement performance or that is to be changed in support so as to maintain performance of a necessary function side in priority.

[0002]

2. Related Art and Problems to be Solved by the Invention
Conventionally, the soil leveling device of the rotary tilling tool at the time of the development has been disclosed in Japanese Utility Model Laid-Open No. 4-6602 (Japanese Utility Model No.
No. 44) As shown in the official gazette (conventional example in FIG. 1), another independent leveling device is attached to the rear of a rotary tilling device, which is one working machine, and each device is independently operated independently. By adjusting it, leveling work and burying work were easily adjusted. However, when a plurality of independent working devices are assembled in this way, the length in the front-rear direction is inevitably lengthened, and if the lifting device for lifting is not large, the lifting force is insufficient and the lifting device is insufficient. For tractors, it is necessary to add an auxiliary lifting device to the machine side, the rear overhang increases, and the working device may hit other objects or break when turning, resulting in reduced safety and operability. Difficulties sometimes occurred.

[0003] In order to solve the above-mentioned drawbacks of safety and operability, Japanese Unexamined Utility Model Publication No. 6-86 will be described below.
No. 403 (conventional example in FIG. 2). In the advanced type, the front end of the leveling plate, which is a leveler, is pivoted on the rear end of the rear cover of the rotary tillage tool. The leveling plate is used as an upright posture to move mud, and the leveling plate is moved horizontally. Is trying to level the mud surface.

In the advanced type, the front-rear length is shorter than that of the conventional rotary tilling device, so that the lift device can be used without changing the lift force to a large capacity. The performance is maintained at the same level as the conventional rotary tillage device. However, in the case of the known development shown in FIG. 2, the rear cover, which is an apron in the specification with respect to the original independent gathering type, is simply configured to freely move up and down, so that the rear cover moves up and down. The level of the leveling plate, which is a leveler attached to the rear end of the rear cover, is easily changed.If the rear cover moves slightly, the vertical position of the front end of the leveling plate automatically changes, which makes it difficult to maintain and adjust the leveling performance and burrowing performance. ing.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve such a drawback of the conventional apparatus, and has taken the following technical means. That is, in the first embodiment, the upper portion of the rotary rotator 1 is covered with a wide main cover 2 in the left-right direction, and a rear cover 4 is attached to a rear portion of the main cover 2 via an elastic connecting plate 3. The left and right sides of the rear cover 4 and the support frame 5 provided on the main cover 2 side are connected to each other by left and right suspension plates 6 and 6, respectively. The front end of the leveler 7 is pivotally mounted 8 slightly upward from the horizontal direction, and the horizontal arm 10 in the substantially horizontal direction is moved up and down between the central portion in the left-right direction of the leveler 7 and the main support frame 9 on the main cover 2 side. And a vertical pressurizing position where the leveler 7 is suspended by its own weight, a lower pressurizing position where the leveler 7 is lifted to reduce its own weight, and an upward movement of the leveler 7. The feature is that it can be changed and adjusted to the earth pushing position that regulates It has a structure of the soil leveling apparatus of the rotary tilling tool for.

According to a second aspect of the present invention, the left and right suspension plates 6, 6 attached between the rear left and right sides of the rear cover 4 and the support frame 5 provided on the main cover 2 side are connected to the main cover of the rear cover 4. 2. A soil leveling device for a rotary tilling device according to claim 1, wherein the soil leveling device is connected to the rear cover 4 to the main cover 2 so as to allow vertical swinging of the rotary tilling. According to the third aspect, an interlocking rod 14 is provided rotatably and projecting upward from a middle part of the horizontal arm 10 which constitutes a part of the center-bend connecting tool 12, and the interlocking rod 14 is attached to the main support frame 9.
The rotary tilling device according to claim 1, wherein the device is connected to allow vertical swing at the portion.

According to a fourth aspect of the present invention, there is provided a center-bending connector 1.
2. The structure of the rotary tillage soil leveling device according to claim 1, wherein a tension spring 13 is attached between the horizontal arm 10 and the main support frame 9 that form a part of 2, and the leveler 7 is pulled up. And According to the fifth aspect, the left and right suspension plates 6, 6 attached between the rear left and right sides of the rear cover 4 and the supporting frame 5 provided on the main cover 2 side are vertically moved with respect to the main cover 2 of the rear cover 4. The rotary tilling device according to claim 1, wherein the device is connected to restrict swinging.

According to a sixth aspect of the present invention, there is provided a center-bending connector 1.
It is assumed that an interlocking rod 14 is provided rotatably and projecting upward from a middle part of the horizontal arm 10 constituting a part of the second arm 2, and the interlocking rod 14 is connected to the main support frame 9 so as to restrict vertical swing. The rotary tilling device according to claim 1 is characterized in that it is a soil leveling device.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, the vehicle is mounted on the rear part of an agricultural tractor 15 so as to be able to move up and down. Rotary work device 1 traveling while traveling
6, the present invention is folded into a rear cover 4 that covers the rear part of the rotary rotating body 1 which is a main part of the rotary working device 16.

[0010] As shown in FIG.
Is provided with a pair of left and right front and rear wheels 36 and 37 on the front and rear sides of the fuselage. An engine 38 is mounted on an upper frame portion between the left and right front wheels 36 and 36, and a hood 39, a front grill 40 and left and right Side covers 41, 41 and the like. 42 is an instrument panel and 43 is a steering handle. The upper part of the left and right rear wheels 37, 37 and the inside between them are covered with fenders 19, 19, and the left and right fenders 1
A seat 44 is provided on the body of the vehicle between 9 and 19, and a driver sits and steers.

A rotary working device 16 pivotally supports a front end of a top link 18 at a center side hitch 17 provided at the rear end of the machine body of the agricultural tractor 15. Is pivotally supported on the upper front end of the upper support frame 9a. The front ends of the left and right lower links 20 are pivotally supported below the rear end of the body of the agricultural tractor 15.

At the rear end of the lower link 20, a support plate 2 integrally fixed to left and right beams 22 and 23 projecting left and right from a central transmission case 21 at the center in the left and right direction.
45 and 4, mounting pins 45 are attached. Further, the lower ends of the left and right lift rods 25, 25 are attached to the lower links 20, 20 halfway. The lift rod 2
5 The upper end is attached to the protruding rear ends of left and right lift arms 26, 26 provided above the rear part of the fuselage. The rotary working device 16 can be moved up and down by rotating the lift arm 26 up and down by an actuator (not shown). And

3, the upper end of a side plate 27 is fixed to the right end of the beam 23, and a side transmission is provided to the left end of the beam 22. The upper end of the case 28 is fixed.
Between the side plate 27 and the lower end of the side transmission case 28, the rotary rotator 1 is suspended in the left-right direction. The rotary rotator 1 has a tilling pipe 29 in the left-right direction and a plurality of tilling blades 34, 34. . . . Claw holders 35, 35. . . The surface of the mud is excavated by the rotation of the rotary rotator 1 or the excavated mud is crushed.

The tilling pipe 29 is driven by the agricultural tractor 1
PT protruding from the rear end of the rear transmission case 30
It is driven by the rotational force transmitted from the O-shaft 31 to the input shaft 33 of the central transmission case 21 at the rear center via the universal joint 32. Although not shown, the driving force input from the input shaft 33 is transmitted from the transmission shaft in the left beam 22 to the upper sprocket in the side transmission case 28 via the bevel gear, and from the upper sprocket to the lower tilling pipe via a chain. This is a normal drive transmission for driving the lower sprocket at the 29 side end. With the drive rotation of the tilling pipe 29, the main cover 2 covers the rotation locus above the tip of the tilling blade 34 that rotates in the direction of arrow "a" in order to prevent the tilling blade 34 from scattering upward due to excavation at the tilling blade 34. I have. In addition, the upper end and the lower end of the connecting plate 3 made of a resilient material having a width substantially equal to the width of the rear cover 4 are provided in the space between the rear cover 4 and the rear cover 4 which is spaced apart from the main cover 2. Rehure main cover 2
Are integrally attached to the rear end of the rear cover 4 and the front end of the rear cover 4 via fasteners such as bolts and nuts. With these, the rotating tilling blades 34, 34. . . From the top to the rear.

As further shown in FIGS. 1, 2 and 4,
At the rear end of the rear cover 4, the front edge of the leveler 7 is mounted on a plurality of pins 8, 8. . It is a leveler 7
Is mounted on the rear cover 4 so as to be vertically swingable. On the lower surface of the rear cover 4 which comes into contact with the mud surface, several teeth 119, 11 having a predetermined interval in the width direction are provided.
9. . . The other end of the tooth 119 made of an elastic material such as a piano wire is supported in a cantilever shape that goes under the shaft attachment 8 and reaches the lower side of the leveler 7. Dust, such as straw debris and grass, in the mud that is performing flat work is pushed into the mud at the tip of the tooth 119,
Dust is prevented from getting entangled in the shaft attachment 8 of the rear cover 4 and the leveler 7.

Also, lower stays 46, 46 are provided on the rear cover 4 on the left and right sides of the rear surface thereof so as to protrude upward.
Between the left and right support frames 5, 5 provided corresponding to the rear portion of the main cover 2 and the lower stays 46, 46, the suspension plates 6, 6 are attached by upper and lower pins 47, 48, respectively. The rear cover 4 is suspended and connected to the main cover 2 to allow or restrict vertical swing. The suspension plate 6 is made of a leaf spring material that is close to a rigid body, and its upper and lower ends are rounded into a cylindrical shape, and the middle portion protrudes upward in an arc shape. During normal work, the shape of the bow does not change, but it is deformed immediately before it is about to be broken to prevent breakage. In other words, in the example shown in the drawing, a leaf spring material is used, but a steel pipe is bent into an arc shape in a side view, and an eyebolt portion for attaching a pin made of a pipe material is provided at the upper and lower ends. is there.

The structure around the support frame 5 is shown in FIGS.
The main configuration will be described mainly with reference to FIG. 4, and the main configuration will be mainly described with reference to FIGS. The support frame 5 is made of a pair of left and right plate members, and is integrally welded to a reinforcing rib plate 49 bulging upward at the rear end of the main cover 2 and protrudes upward. The long holes 50, 50 open in the front-rear direction opened above the left and right plate members of the support frame 5.
The upper end of the suspension plate 6 is attached by an upper pin 47 therebetween. Both ends of the upper pin 47 are supported by the elongated holes 50, 50, and are movable along the elongated holes 50.

An operation arm 51 is attached to a vertically intermediate portion of the support frame 5 so as to be swingable up and down around a shaft 52, and is provided so as to be able to hold an upper position or a lower position. The lower end of the operation arm 51 is integrally attached to the bottom surface of the swinging plate 57 having a U-shaped upper opening by welding or caulking pins when viewed from the front, and this swinging plate 57 is attached to a pair of left and right support frames 5, 5. It is mounted on a horizontal shaft 52 between them.

FIG. 5 shows the lower locking position of the operating arm 51. The restricting portion 53 projecting upward from the swinging plate 57 blocks the upper half of the elongated hole 50, and Pin 47
Forward movement of the part is restricted on the way. The operation arm 51 is moved in the direction of arrow "B" from the lower locking position shown in FIG. 5, and is a horizontal pin integrated with the swing plate 57 as shown in FIGS. When the portion 118 is moved to the lower end side of the lock hole 54 opened in the support frame 5, the regulating portion 5
3 leaves the slot 50. Thus, the upper pin 47 of the suspension plate 6 can move in the entire range along the elongated hole 50 provided in the support frame 5. Reference numeral 55 denotes a tension spring, one end of which is attached to the lateral shaft 52 provided on the support frame 5 and the other end of which is attached to the above-mentioned locking portion 118 of the swinging plate 57, and draws both together. As a result, the locking portion 118, which is a horizontal pin made of a round bar, is pulled toward the shaft 52, and the rocking plate 57 is moved by the length of the long hole play around the shaft 52. The positioning is performed by pressing the locking portion 118 against the locking concave portion.

Further, between the supporting frames 5 and 5 below the long hole 50,
Another horizontal shaft 58 is provided, and the front end of a vertically moving arm 56 projecting rearward from the other shaft 58 is mounted on the other shaft 58. A horizontal shaft 59 protrudes left and right at an intermediate portion of the vertical movement arm 56 in the front-rear direction.
5 are supported in a predetermined posture by supporting portions 60 provided at the rear portion.

As shown in FIGS. 2 and 5, the projecting end of the vertically moving arm 56 comes into contact with the rear cover 4 when the rear cover 4 is largely lowered and the suspension plate 6 is lowered. The lowering of the suspension plate 6 is restricted by the upward movement of the rear cover 4 during operation.
Is moved upward, a gap is formed at the protruding end. This means that the rotary working device 1 can be used at the end of work or at the edge of the field.
6 is hung largely behind the agricultural tractor 15,
When the suspension plate 5 is made rigid, the upper pin 47 of the suspension plate 6
As shown in the state shown in FIG. 6, it has moved to the vicinity of the lowermost part along the long hole 50 of the support frame 5. In addition, during normal soil leveling, when the rotary working device 16 causes the rear cover 4 to contact the excavated mud as shown in FIG.
7 moves to the uppermost side along the long hole 50 of the support frame 5 as shown in FIG.

As shown in FIGS. 3 and 4, the support frame 5 is provided substantially symmetrically on the left and right sides of the upper surface of the main cover 2, and is soft through a connecting plate 3 made of an elastic rubber plate or the like. The rear cover 4 hung on the left and right sides is
The rear cover 4 is suspended so as to keep the left and right balance substantially even via the rear cover 6 to prevent the rear cover 4 from being largely inclined to one side when viewed from the rear.

When the ordinary rotary working device 16 is leveled, the upper pin 47 of the suspension plate 6 is positioned in the middle of the elongated hole 50 of the support frame 5 in the front-rear direction. To determine the length. As described above, the upper pin 47 that can move back and forth along the long hole 50 of the support frame 5.
In some cases, the upward movement of the elongated hole 50 from the middle portion may be restricted by the restricting portion 53 by the operation of the operation arm 51. In this state, the upward movement of the suspension plate 6 attached to the upper pin 47 is restricted as shown in FIG. 5, so that the rear cover 4 is pressed to the downward movement position as shown by the phantom line in FIG. And the upper end of the leveler 7 is pushed down directly by the rear cover 4 or indirectly by pushing down the front end of the leveler 7 to be described later. It can be easily done at the position.

As described above, when the normal rotary working device 16 is in the soil leveling position, the upper pin 47 of the suspension plate 6 is used.
Is located in the front and rear middle part of the long hole 50 of the support frame 5,
Since the length of the suspension plate 6 is determined, when a later-described leveler 7 is axially mounted 8 by its own weight, the rear cover 4 is also suspended when the leveler 7 moves up and down to some extent according to the unevenness of the field uniform plane. The upper pin 47 of the plate 6 moves up and down to some extent along the long hole 50 of the support frame 5, so that the vertical movement of the rear cover 4 or the leveler 7 during leveling work is not restricted and the work with its own weight is easily performed. I can do it.

Furthermore, if the suspension plate 6 is formed of a soft leaf spring, the lower end of the suspension plate 6 is vertically displaced according to the load, and the resistance of the front surface of the rear cover 4 during soil movement is adjusted.
Even if a sudden change in the attitude of the rotary working device 16 occurs, it is possible to provide a device in which the soil moves smoothly and the evenness of the mud surface and the durability of the members are improved. Next, the entire structure of the member for suspending the leveler 7 will be mainly described with reference to FIGS. 1, 3, and 4, and the enlarged structure of the main part will be described with reference to FIGS. 7, 8, 9, 10, and 1.
1, FIG. 12, FIG. 13, and FIG.

As described above, the rotary working device 16
Center transmission case 21, left and right beams 22, 23,
The side plate 27 and the side transmission case 28 constitute one main frame by welding, bolting, or the like. A pair of left and right main support frames 9 made of a flat plate protruding in a fin shape are integrally attached to the central transmission case 21 by welding or the like from above to behind.

At the rear end of the main support frame 9, the main shaft 6
The front end of the horizontal arm 10 is attached to the main shaft 66. The front end of the leveler 7 is journalled 8 to the rear end of the rear cover 4.
In contrast, the rear end side of the leveler 7 is vertically swingable. A lower support plate 67 protrudes upward at the center of the leveler 7 in the left-right direction at the center upper surface in the front-rear direction in the side view, and between the lower support plate 67 and the rear end of the horizontal arm 10 described above. The vertical arm 11 is vertically and horizontally oriented.
Attached via.

The horizontal arm 10 and the vertical arm 11 form a center-bending connector 12. By vertically moving and adjusting the center-bending connector 12, the vertical position of the leveler 7 with respect to the main frame is adjusted by the leveler 7's own weight. In addition, the state of the leveler 7 is changed to a low pressure state, the leveler 7 is controlled to move upward, and the like. Hereinafter, the vertical movement adjusting mechanism of the center-bending connector 12 will be specifically described.

A main support frame 9 composed of left and right flat plates projecting in a fin shape has an upper support frame 9 projecting further upward.
a, 9a have fastening parts 69, such as bolts and nuts,
At 69, they are integrally attached. This upper support frame 9
Reference numerals a and 9a cover a part of an interlocking device to be described later, and open top link mounting holes 70 and 70 at the upper front end.
A part of the left and right upper supporting frames 9a, 9a is reinforced and connected at left and right intervals by a left and right connecting plate 83, and a stay 71 is integrally protruded upward from the left and right connecting plate 83. A tension spring 13 is attached between the stay 71 and a lever 73 attached to the horizontal arm 10. The tension spring 13 pulls up the center-bending connector 12, and when the tension spring 13 is pulled up, the grounding pressure of the leveler 7 can be reduced as shown in FIG. 1 to perform a leveling operation. Further, the tension spring 13 is also configured to be loosened. When the position of the lever 73 is moved forward as indicated by the imaginary line to loosen the tension spring 13, the force for pulling up the center-bending connector 12 also decreases, and although not shown, the leveler 7 Performs leveling work by contacting the ground with the ground slightly lowered by its own weight.

The area around the lever 73 attached to the horizontal arm 10 will be described in detail below. As shown in FIGS. 7 and 8,
At the rear of the horizontal arm 10, a support plate 7 having a U-shaped lower opening
6 is integrally reinforced by welding or the like while being covered. At the lower end of the support plate 76, a lateral mounting hole for mounting a pin serving as a shaft 75 is opened.
3 are provided with lower end mounting holes. Integrated support plate 7
A groove 74 having a U-shape in plan view is opened in the ceiling of the horizontal arm 6 and the horizontal arm 10, and the groove 74 holds an intermediate portion of the lever 73 therethrough. The front and rear locking portions 74a and 74b are provided before and after the groove 74, respectively, and the lever 73 is engaged with either of the front and rear locking portions 74a and 74b in the longitudinal direction in the groove 74 so as to be locked. It is pressed by a regulating guide spring 77 made of an elastic material such as a piano wire provided along the same. A swing stay 72 is welded and integrated with the upper and lower middle portions of the lever 73, and the rear end of the above-described tension spring 13 is attached to a hole 78 opened at the front end of the swing stay 72. The position of the lever 73 is adjusted to swing back and forth to change the tensile strength of the spring. Reference numeral 79 denotes a collar, which is attached to the lower portion of the regulating guide spring 77 of the shaft 75 to restrict the lower end of the lever 73 from moving freely in the lateral direction due to the thrust force of the spring.

When the lever 73 is held at the rear locking portion 74b of the groove 74, the tension spring 13 is pulled in the direction in which it extends, and the ground pressure of the leveler 7 is reduced. Also, when the lever 73 is swung forward indicated by the phantom line and held at the front locking portion 74a, the tension spring 13 is loosened, so that the center-bending connector 12 hangs down by its own weight, and the leveler 7 is correspondingly lowered. Do the leveling work by hanging under its own weight.

As described above, the lever 7 shown by the solid line in FIG.
At the third position, the tension spring 13 is pulled, indicating an operation state in which the contact pressure of the leveler 7 is reduced. In this state, the soil movement on the surface of the field is reduced and the upper surface is simply rubbed lightly, so that the work is performed in the field with good evenness. Thus, the extension spring 13 is connected to the upper stay 7.
1 and the lower swing stay 72, so that there is no obstruction around it and the tension spring 13
When directly changing the member to one with a different load,
The configuration is such that the indirect change in the tensile load, such as increasing the number of adjustment strokes of the lever 73, can be performed very easily and easily.

A lower support plate 82 is mounted in front of the support plate 76 of the horizontal arm 10, and the lower end of the interlocking rod 14 is mounted on the lower support plate 82. As shown in FIG. 9, the upper end of the interlocking rod 14 protrudes upward from an insertion hole 85 opened in a coma boss 84 held and supported between the left and right upper support frames 9a, 9a. A hole 86 is opened in the coma boss 84 in the axial direction, and a lock pin 87 is attached to this hole 86 so as to be freely expandable and contractible.

At the upper part of the interlocking rod 14, a single lock hole 88 penetrating in the left and right direction and a slide long hole 89 extending one side along the axial direction are provided. Then, the lock pin 87 in the aforementioned coma boss 84
9 is engaged with the elongated slide hole 89 as shown in FIG. 9, the interlocking rod 14 can be moved within the range of the elongated slide hole 89 along the insertion hole 85 in the coma boss 84. In other words, in other words, the center bending connector 12 moves up and down within the range of the slide elongated hole 89, and the leveler 7 attached to the lower end thereof has a detailed operation, which will be described later. It is running while performing leveling work as it can move up and down.

When the lock pin 87 is disengaged from the slide elongated hole 89 in accordance with an operation described later and engages with the lock hole 88 of the interlocking rod 14, the interlocking rod 14 moves to the lowermost end and the movement is stopped. Since it is fixed, the center-bending connector 12 also moves downward, and although not shown, the leveler 7 can be erected upright at an angle of about 60 degrees to move the mud on the ground surface largely. However, the movement of this large mud tends to create irregularities on the surface of the field, and on the contrary, there is a disadvantage that the ground surface is roughened unless an experienced worker is used.

Reference numeral 90 denotes a roll pin,
4 is driven into the upper end portion in a laterally protruding manner. Thus, when the lock pin 87 is not operated, the rotary working device 16
, The interlocking rod 14 is prevented from falling out of the insertion hole 85 of the coma boss 84 even when the interlocking rod 14 moves down. Reference numeral 92 denotes a lock lever, which protrudes outward on the left side of the upper support frame 9a, which is a pair of left and right facing plates, as shown in FIGS.
The base end of the lock plate 91 is fixed to the three portions with pins 94, and the lock plate 91 is turned ON and OFF by a pulling force over a fulcrum of a spring 95 attached between the middle portion of the lock lever 92 and the upper support frame 9a. Holds each position.

The lock pin 87 described above is used for the slide slot 8
9, when the leveler 7 is performing leveling work along the ground surface in a substantially horizontal direction, the rotary working device 16 is lifted, the horizontal arm 10 is lowered, and the lock pin 87 is inserted into the elongated slide hole. When the lock lever 92 is operated in the direction indicated by the arrow “E” as shown in FIG. 14 when the lock lever 92 is at the upper end of the 89 portion, the rocking end of the lock plate 91 integrally attached to the lock lever 92 is moved to the upper end of the interlocking rod 14. It swings so as to approach the part, and regulates the upward movement of the interlocking rod 14. When the rotary working device 16 is lowered in this state, the leveler 7 can move a small amount of mud on the ground surface while maintaining a substantially horizontal and fixed posture.

Reference numeral 96 denotes a reinforcing rod, which is a lock plate 9.
1 is connected left and right, and the interlocking rod 14 is connected.
When the member is operated to a position close to the upper end of the interlocking rod 14, the upper end of the interlocking rod 14 is brought into contact with this member.
Is restricted from moving upward. Next, the lock pin 87
Will be described.

As shown in an enlarged plan sectional view of a main part in FIG. 9, the coma boss 84 has a cylindrical small diameter and shoulders at both ends thereof.
The upper and lower support frames 9a, 9a are rotatably supported on the left and right upper frames.
A lock pin 87 is inserted into a hole 86 in the axial direction of the coma boss 84 from the right outside. The lock pin 87 is always pressed in the direction of the arrow “F” by the pressing spring 97. The tip of the lock pin 87 has a tapered surface 98 on one side, which is a main part for smoothly performing the operation of the present configuration. In the illustrated example, a swing arm 99 is protruded in a direction opposite to the tapered surface 98. The boss 100 is locked to the base end of the lock pin 87 by a roll pin 100a.

The function of the swing arm 99 at the end of the lock pin 87 can be briefly described as follows. The swing arm 99 is pivoted about a coma boss 84 rotatably supported by the left and right upper support frames 9a, 9a. The lock pin 87 can be turned upward by turning the swing arm 99 downward or by one-touch operation.
The tapered surface 98 at the tip is to be flipped up and down.

That is, as described above, when the rotary working device 16 is lifted high in the air, the lowering of the leveler 7 is free. During the leveling operation by lowering the rotary working device 16 to the ground surface side and leveling the lower surface of the leveler 7 in the grounding state, the interlocking rod 14 is moved by the coma boss 84 due to the grounding of the leveler 7.
Move in the upward arrow “G” direction along the insertion hole 85 of the upper side. In this way, the interlocking rod 14 is constantly exerted with a force to move vertically in the downward direction when the work implement is lifted and upward when the work implement is lowered.

When the direction of the tapered surface 98 of the lock pin 87 is changed to be upward or downward, the following characteristics are generated. For example, as shown in FIG. 11, when the direction of the arrow “G” is applied to the interlocking rod 14 when the tapered surface 98 is oriented upward, the lock pin inserted into the lock hole 88 of the interlocking rod 14. 87 does not come out only because a bending force acts on the upright edge of the tip. Further, even if a load in the direction indicated by the arrow “G” is applied, the projecting ends of the roll pin 90 (deployed by 90 degrees and shown) attached to the tip of the interlocking rod 14 are in contact with the insertion holes 85 of the coma boss 84. The lock pin 87 inserted into the lock hole 88 maintains the same posture because the load is supported. That is, FIG. 11 shows a state in which the interlocking rod 14 is locked regardless of the position of the rotary working device 16, and the horizontal arm 10 of the bending tool 12 is locked.

Next, in the state shown in FIG. 11, although not shown, the rocking arm 99 is operated upward to lock the lock pin 87.
Is rotated 180 degrees. When a load in the direction indicated by the arrow “G” acts on the interlocking rod 14, as described above, the projecting ends of the roll pin 90 contact the insertion hole 85 to support the load, and the lock pin 87 is left as it is. I keep my posture. However, when a load in the direction of arrow "g" acts,
The lock hole 88 of the interlocking rod 14 is
The taper surface 98 of the lock pin 87 is pushed up and moved against the pressing spring 97, and as shown in FIG. 9, the lock pin 87 moves to the slide elongated hole 89 portion of the interlocking rod 14 and locks by the load of the pressing spring 97. The tip of the pin 87 protrudes into the slide elongated hole 89 until the state shown in the drawing, and is stabilized.

FIG. 9 shows a rotary working device 16.
Is suspended in the air, and a lock pin 87 is shown.
As a result, the interlocking rod 14 does not move further downward, but the rotary working device 16 is lowered to the ground side to
When the state shown by 5 is reached, the leveler 7 touches the ground (4
Degrees up to about 8 degrees. Then, during the leveling operation, the middle bending connector 12 is moved up and the interlocking rod 14 is pushed up (in the direction of the arrow "g"), so that the interlocking rod 14 moves up and down within the range of the slide elongated hole 89. I do. That is, the operation state shown in FIG. 9 shows the operating range position of the interlocking rod 14 when the leveler 7 runs up and down while performing leveling work.

The lock pin 87 in the state shown in FIG. 9 is not shown, but the swing arm 99 is operated downward to rotate the lock pin 87 by 180 degrees so that the tapered surface 98 is directed upward. Then, when the entire rotary working device 16 is lifted, the interlocking rod 14 moves in a direction opposite to the arrow “G” due to the weight of the leveler 7 side, and as described earlier with reference to FIG. Lock in a fixed position at the lowered position. The rotary working device 16 in this locked state
Although the posture is not shown when descending again to the ground side and moving forward, the leveler 7 can move a large amount of mud on the field surface in a substantially vertical posture in which the leveler 7 has risen forward by about 60 degrees.

The posture change of the swing arm 99, which is the operation of turning the lock pin 87 up and down, is performed by the inversion operation lever 101 in the illustrated example. About its constituent action,
The details will be described below. In the overall perspective view of FIG. 3, the reversing operation lever 101 protrudes outward to the right and above the upper support frame 9a, and in the side views of FIGS.
Indicates swinging back and forth about the fulcrum 102. The upper end of a link rod 103 is pivotally mounted on the reversing operation lever 101.

As described above, since the swing arm 99 only needs to be turned upside down around the hole 86 of the coma boss 84 attached to the upper support frame 9a, the lower end of the link rod 103 is required to have a simple structure. By engaging the pin 104 at the tip of the swing arm 99, the swing arm 99 can be directly turned upside down with the forward / backward operation of the reversing operation lever 101.

However, in the illustrated example, in order to increase the certainty of the direction and range of the swing, the pin at the tip of the swing arm 99 swings through the regulating plate 105 that determines the range of the upside-down swing. 104 is being operated. That is, the regulating plate 105 is an arc 107 which is opened to the regulating plate 105 with the radius between the shaft 106 and the lock pin 87 around the shaft 106.
The lower end pin 109 of the link rod 103 is used to swing vertically with the outer diameter of the shaft of the lock pin 87 as a guide surface. A long hole 108 is opened in the regulation plate 105 on the distal end side in a direction orthogonal to the arc 107, and the pin 104 at the tip of the swing arm 99 is engaged with the long hole 108. When the regulating plate 105 is moved rightward as shown in FIG. 10, the pin 104 at the tip of the swing arm 99 swings.
Also moves rightward along the elongated hole 108, and when the regulating plate 105 is moved leftward as shown in FIG. Flip to the left along the movement of.

Reference numeral 110 denotes a tension spring,
The reversing operation lever 101 which is swung around two times and is reversed.
Is positioned at one of the positions shown in FIGS. 10 and 12 by passing over the fulcrum of the spring. Next, a description will be given of another main configuration provided in the upper supporting frame 9a mainly with reference to FIGS.

A boss 111 is integrally attached to a fulcrum 102 of the reversing operation lever 101 by a roll pin 111a, which is swingably supported by the left and right upper support frames 9a, 9a. 112 protrudes downward. The left and right upper supporting frames 9a, 9a
A shaft 114 of the cam 113 is similarly axially mounted on the front portion of the coma boss 84 that is swingably supported therebetween. The lower pin hole 11 of the cam 113
A link 117 is attached between the upper pin hole 116 of the arm 112 and the upper pin hole 116 to link the two together.

With this configuration, the cam 113 is always operated when the reversing operation lever 101 is operated, and the purpose thereof will be described in detail below. The cam 1
13, the inversion operation lever 101 is indicated by a virtual line,
By operating the lock pin 87 in the direction of arrow "H",
When the interlocking rod 14 shown in FIG.
The projecting upper end of the interlocking rod 14 is forcibly manually pressed in the direction indicated by the arrow "G".

This is because when the tension spring 13 of the center bending connector 12 has a strong depressurizing action and the movement of the interlocking rod 14 on the lower side is difficult to move, the interlocking rod 14 can be easily pushed down by the addition of human power. Contrary to this, by providing this configuration, the tensile strength of the tension spring 13 can be increased, so that the pressing force of the leveler 7 can be further reduced, and a clean leveling operation with less soil movement can be performed.

Next, the overall configuration and operation will be briefly described. The rotary working device 16 of this example is a working device having a wide excavation rotary blade of about 2 m to 3 m. The rotary working device 16 is a three-point link that is provided at the rear of the agricultural tractor 15 and that can be moved up and down freely. After being suspended in a suspended manner through the device and water is poured into the previously excavated field, first, the excavated soil surface is kneaded into a fluid state by a rotary blade.

Then, the kneaded fluid mud is
In places where the topsoil of muddy soil is severe in the leveler 7 behind the device, the pressing force of the leveler 7 is increased, or the posture of the substantially horizontal leveler 7 is changed to move up, down, left and right. The vertical movement of the leveler 7 is reduced while increasing the level, and the leveling work is performed on the large uneven mud topsoil. Also, in a field with little unevenness from the beginning, in order to prevent the soil on the mud surface from moving, the pressing force by the own weight of the leveler 7 is raised upward by a decompression spring to which a load in the opposite direction is applied, and lightened to reduce the small uneven mud surface soil. Leveling. As described above, the attitude, pressing force and depressurizing force of the leveler 7 are finely adjusted according to the size of the unevenness of the topsoil, so that the mud topsoil is leveled like a mirror over the entire field. .

For this reason, as a specific configuration, the rear cover 4 is attached obliquely to the rear of the rigid main cover 2 that covers the upper part of the rotary rotator 1 via a rubber plate made of an elastic material. 4 can be freely moved back and forth and left and right.
While holding only the vertical height of the mounting portion by the lower end mounting portions of the suspension plates 6, 6 protruded from the rigid body side, the other front-rear and left-right movements such as the cover surface are held without much restriction. A leveler 7 having a front end pivotally mounted on the rear edge of the rear cover 4 in the state so as to be vertically swingable. Thereby, when lifting the working device, the rear end of the leveler 7 hangs down in the upright direction,
During the leveling work in which the working device is lowered to the soil topsoil side, the rear end of the leveler 7 comes into contact with the soil, so that the posture becomes substantially horizontal in a side view.

When the leveler 7 in this state is suspended by a center-bending connector 12 provided at the center in the left-right direction of the working device, and this center-bending connector 12 is strongly pulled upward by a tension spring 13, the leveler 7 is lifted. The leveler is almost horizontal when viewed from the side, and the mud on the surface of the field is lightly leveled to reduce and weaken the soil movement. Leveling work can be performed.

Further, when the tension load of the tension spring 13 for pulling the center-bend connecting tool 12 upward is adjusted to be weak, the center-bending connector 12 hangs down due to gravity, so that the leveler 7 becomes substantially horizontal in a side view. The flat force is approximately the same as the weight of the member, and it travels up and down on the ground surface to move the surface mud to a certain extent, and can evenly clean even slightly uneven surface of the field. Flat work can be performed.

At this time, in addition to the various adjustments of the center folding connector 12 in the center in the left-right direction, the suspension plates 6 and 6 provided on both the left and right sides of the rotary working device 16 are suspended by operating the operation arm 51. The upper cover 6 restricts escape of the rear cover 4
By preventing the upward movement of the rear cover 4 to a certain extent, it is possible to easily adjust the vertical position of the lower edge of the rear cover 4 which is substantially obliquely inclined to the lower position. The front end position of 7 can also be lowered to a low position to level the mud surface, and leveling work can be performed with a low pressing force of the leveler while holding the mud in front of the rear cover. In this state, an operation with more soil movement can be easily performed even by an inexperienced worker.

Further, during leveling work with the leveler's own weight pressing force, which is a leveling and vertical following leveling state, if the lock plate 91 is desired at the upper end of the interlocking rod 14 to restrict the upward movement of the interlocking rod 14, the leveler 7 slides. The upward movement by the long holes 89 is regulated, and strong movement of the soil can be performed with the upward movement of the entire leveler restricted to some extent. Until this work, even an inexperienced worker can easily perform the work.

Next, when the interlocking rod 14 is further moved to the lowermost position and locked by the lock holes 8, the leveler 7 stands upright at an angle of about 60 degrees with respect to the ground, and the rear end edge of the leveler 7 is in the mud. , It is easy to move the mud even when there are large irregularities on the field surface, and it is possible to perform leveling work with large-volume soil movement. This operation greatly improves soil movement performance, but requires experience to maintain leveling performance.

[0061]

According to the present invention, as described above, the upper part of the rotary rotator 1 is covered with the main cover 2 having a wide width in the left-right direction, and the rear part of the main cover 2 is elastically mounted. A rear cover 4 is mounted via a connecting plate 3 made of a material, and a support frame 5 provided on the left and right sides of the rear cover 4 and on the side of the main cover 2.
The left and right suspension plates 6 and 6 are connected to each other, and the front end of the leveler 7 is attached to the lower end of the rear cover 4 so that it can swing up and down slightly and rise slightly forward from horizontal. 8
The center of the leveler 7 in the left-right direction and the main support frame 9 on the side of the main cover 2 are connected by a center-bending connecting device 12 comprising a horizontal arm 10 in a substantially horizontal direction and a vertical arm 11 in a vertical direction. The rotary is characterized in that it can be freely changed between a vertical pressurizing position where the weight 7 is suspended by its own weight, a low pressure position where the leveler 7 is pulled up to reduce its own weight, and a earth pressing position where the upward movement of the leveler 7 is restricted. The construction of the soil leveling device for tilling implements has the following technically unique effects.

That is, in a place where the unevenness of the mud surface is severe, if the leveler performing leveling work while moving up and down to some extent as its own weight pressurizing position is restricted to the earth pushing position that regulates the upward movement of the leveler, It is possible to accumulate soil at the leveler part and move forward, strengthening the soil movement pressing force and increasing the movement of the soil in the front, back, left and right, reducing the upward fluctuation of the leveler and moving the mud of the convex part to the concave part ,
Leveling work can be easily performed on large uneven mud surface soil.

Further, in a field with little unevenness from the beginning, the leveler can be moved forward by setting the leveler at the low pressure position to reduce the pressure applied by the leveler's own weight and moving the soil on the mud surface without moving. Light leveling with no soil movement on uneven mud topsoil can be performed. The left and right suspension plates 6, 6 attached between the rear left and right sides of the rear cover 4 and the support frame 5 provided on the main cover 2 side.
2. The structure of the rotary tillage device according to claim 1, wherein the rear cover 4 is connected to the rear cover 4 to the main cover 2 to allow the rear cover 4 to swing up and down with respect to the main cover 2. The vertical swing of the rear cover can be easily performed by its own weight, and the leveler that is pivotally mounted on the rear edge of the rear cover can be moved by its own weight with some flexibility, and smooth leveling work can be performed. .

According to the third aspect of the present invention, there is provided a center-bending connecting device 1.
It is assumed that an interlocking rod 14 is provided rotatably and projecting upward from a middle part of the horizontal arm 10 constituting a part of the second arm 2, and the interlocking rod 14 is connected to the main support frame 9 to allow vertical swing. Since the soil leveling device for a rotary tilling device according to claim 1 is configured, regardless of the rear cover posture, the leveler posture can be moved with a certain degree of flexibility up and down, and back and forth and left and right by its own weight. Can be moved smoothly for leveling work with less unevenness.

According to a fourth aspect of the present invention, there is provided the bending tool 1
2. The structure of the rotary tillage soil leveling device according to claim 1, wherein a tension spring 13 is attached between the horizontal arm 10 and the main support frame 9 that form a part of 2, and the leveler 7 is pulled up. The tension spring for moving the leveler forward so that it does not move the soil on the mud surface by reducing the pressing force by the leveler's own weight by setting the leveler to the low pressure position, there is no obstacle around the spring Since it is attached, the load and replacement of the tension spring can be easily and easily changed, so even if there is a difference in the surface of small uneven mud in the field, it is possible to easily change the stroking force and easily change the load appropriately Work with less rough surface can be performed.

According to a fifth aspect of the present invention, the left and right suspension plates 6 and 6 attached between the rear left and right sides of the rear cover 4 and the supporting frame 5 provided on the main cover 2 side are provided. 2. The rotary tilling device according to claim 1, wherein the rear cover is connected to regulate the vertical swing of the rotary cultivator. The front end of the mounted leveler also moves up and down, and when leveling is performed while leveling the entire leveler as its own weight pressurizing position, it is possible to regulate the escape of the rear cover upwards, which means that Since the upward movement of the part is also restricted, it is possible to move forward with little change in the front posture of the leveler with mud accumulated in front of the rear cover, and it is possible to move forward by increasing the earth pressing force on the mud surface of the convex part , Is easy pushing mud into parts, it can be easily Hitoshitaira work with earthmoving mild.

According to the sixth aspect of the present invention, there is provided the bending tool 1
It is assumed that an interlocking rod 14 is provided rotatably and projecting upward from a middle part of the horizontal arm 10 constituting a part of the second arm 2, and the interlocking rod 14 is connected to the main support frame 9 so as to restrict vertical swing. The rotary tilling device according to the first aspect of the present invention has the structure of the soil leveling device, so that the vertical back arm of the leveler is pushed down by the vertical arm of the center-bending connector so that the vertical swinging motion is performed. Since the forward movement is performed with the leveler standing in a substantially upright position, the soil can be accumulated on the front of the leveler and the front of the rear cover above it, allowing the soil to move forward. Leveling work with soil movement can be performed in a short time.

[Brief description of the drawings]

FIG. 1 is a side view of the entire rotary tilling tool at a center bending connector part in the center in the left-right direction.

FIG. 2 is a side view of the entire end surface of a laterally extending suspension plate portion.

FIG. 3 is an overall rear perspective view of the rotary tillage soil leveling device.

FIG. 4 is a simple overall rear view of the rotary tiller partially unfolded.

FIG. 5 is an enlarged side view of a main part of a support frame in FIG. 2;

FIG. 6 is an enlarged side view of FIG. 5 after adjustment of a main member of the support frame portion.

FIG. 7 is an enlarged side view of a main part around the rear part of the horizontal arm in FIG. 1;

8 is a rear sectional view and a plan view around the rear part of the horizontal arm in FIG. 7;

FIG. 9 is a cross-sectional plan view around the upper support frame in FIG. 1;

FIG. 10 is a side view of a main part around the upper support frame in FIG. 1;

11 is a cross-sectional plan view in the direction of arrow B in FIG.

FIG. 12 is a side view showing an adjustment state of a main part member in FIG. 10;

FIG. 13 is a cross-sectional side view around the upper support frame in FIG. 1;

FIG. 14 is a partial cross-sectional side view of an upper support frame in FIG. 1;

FIG. 15 is an overall side view at the time of leveling work in which the working device is attached to a tractor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary rotary body 2 Main cover 3 Connecting plate 4 Rear cover 5 Support frame 6 Suspension plate 7 Leveler 8 Axle mounting 9 Main support frame 9a Upper support frame 10 Horizontal arm 11 Vertical arm 12 Center bending connector 13 Tension spring 14 Interlocking rod

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Kinami 1 Tochi-cho, Tobe-cho, Iyo-gun, Ehime Pref. Iseki Agricultural Machinery Co., Ltd. (72) Inventor Yasushi Shimada Yasushi Shimada, Ehime Pref.

Claims (6)

[Claims] 1. An upper portion of a rotary rotator 1 is covered with a main cover 2 which is wide in the left-right direction, and a rear cover 4 is attached to a rear portion of the main cover 2 via a connecting plate 3 made of an elastic material. And the supporting frame 5 provided on the main cover 2 side are connected to each other by left and right suspension plates 6 and 6, respectively. The front end of the leveler 7 is pivotally mounted 8 in the raised state, and the center of the leveler 7 in the left-right direction and the main support frame 9 on the main cover 2 side
The space between them is connected by a center bending connector 12 comprising a horizontal arm 10 in a substantially horizontal direction and a vertical arm 11 in a vertical direction, and a vertical self-weight pressing position for suspending the leveler 7 by its own weight and the leveler 7 are lifted to reduce their own weight. A soil leveling device for a rotary tilling device, which can be freely changed to a low pressurizing position to be reduced and a soil pushing position to regulate upward movement of the leveler 7. 2. The left and right suspension plates 6, 6 attached between the rear left and right of the rear cover 4 and a support frame 5 provided on the main cover 2 side.
2. The soil leveling device for rotary tilling tools according to claim 1, wherein the rear cover 4 is connected to the rear cover 4 to the main cover 2 to allow the rear cover 4 to swing vertically with respect to the main cover 2. 3. An interlocking rod 14 that is rotatably and upwardly protruded from a middle part of the horizontal arm 10 that constitutes a part of the center-bending connector 12, and that the interlocking rod 14 is vertically swung by the main support frame 9 portion. The soil leveling device for a rotary tilling device according to claim 1, wherein the device is connected to allow movement. 4. The rotary according to claim 1, wherein a tension spring is attached between the horizontal arm and the main support frame, which constitute a part of the center-bending connector, and the leveler is pulled up. Tillage soil leveling device. 5. Left and right suspension plates 6, 6 attached between the rear left and right of the rear cover 4 and a support frame 5 provided on the main cover 2 side.
The soil leveling device for a rotary tilling device according to claim 1, wherein the rear cover (4) is connected so as to restrict vertical swing of the rear cover (4) with respect to the main cover (2). 6. An interlocking rod 14 which is rotatably and upwardly protruded from a middle part of the horizontal arm 10 which constitutes a part of the center bending connecting tool 12, and which is vertically swung by a main support frame 9 portion. The soil leveling device for a rotary tilling device according to claim 1, wherein the device is connected to restrict movement.