JP3878184B2 - Combined tillage device - Google Patents

Description

The present invention relates to a composite tillage device that is provided with a single row disk harrow at the rear of a subsoiler so as to be movable up and down, crushed excavated soil excavated by the subsoiler, and can be backfilled in a excavation groove formed by the subsoiler.

For example, Japanese Patent Laid-Open No. 2001-112303 discloses a subsoil crusher that is provided rearward in the tractor traveling direction and crushes subsoil disposed along the work width direction at the front position of the work machine, and the heart There has been proposed a tilling work machine provided with a rotary tiller that is provided behind the soil crusher in the working direction and crushes the subsoil crushed by the subsoil crusher and cultivates the ground.

Japanese Patent Application Laid-Open No. 2002-369602 discloses a compound tillage working machine in which a furrow tiller working machine is provided on one side of the bottom plow working machine and a crushed soil pressure reducing rotor is disposed behind the furrow tiller working machine. Yes.

The multi-task machine is designed to consolidate the work machines that are used individually into one machine and reduce the number of strokes to achieve a work economy. For example, on the field surface plowed by a plow working machine, the soil is arranged in a wave shape and the unevenness is relatively large, so that the planting work and the sowing work cannot be performed immediately. For this purpose, crushed work and leveling work are individually applied to the field surface that has been inverted, but this is completed in one stroke with a combined tillage machine. It is intended to realize the economics of work.

As for the subsoiler, a conventional soil improvement work machine that is constructed by attaching a knife to the work machine frame, crushes the bottom bottom of the soil, and the subsoil below it, giving water and air permeability to the cultivated land. As well known. For example, a subsoiler is disclosed in Japanese Patent No. 3387736 and Japanese Patent Laid-Open No. 2000-270602.

In addition, Seki edited by Kitani: Biological Production Mechanics, May 1993, Corona (Tokyo), p. 184-185, the productivity of soil, that is, the geopower, is deeply related to tillage. Machines that improve cultivated land and increase earth power are widely called land improvement machines, but a representative example of a machine that directly improves soil is a subsoil breaker. It is described.
JP 2001-112303 A Japanese Patent No. 3387736 Satoshi Kitani: Biological production mechanics, May 1993, Corona, Inc. (Tokyo), p.

The problem to be solved is to crush the excavated soil excavated by the subsoiler by a single-row disk harrow that holds the subsoiler deeply and is connected to the rear of the subsoiler so as to be movable up and down, and the excavation groove formed by the subsoiler It is intended to provide a composite tillage device that can level the field so that the wheels of the tractor do not fit into the excavation groove during farming.

In addition, paddy fields are converted to upland fields by reducing rice production. In this case, subsoilers are used to crush the dredging floors for flooding and to make drainage fields with good drainage. However, the vertical groove formed in the ground by the use of the subsoiler has caused a problem that the wheels of the farm tractor are fitted as they are. Therefore, providing a compound tillage device that can backfill excavated soil into the longitudinal groove and solve the above-mentioned problems is another problem to be solved.

In addition, a disk angle is imparted to the single row disk harrow, the gang of the disk harrow is tilted forward and backward, and there is no hindrance during plowing work, and a stand that supports the single row disk harrow to the ground during storage is provided. The provision is also a problem to be solved.

In the subsoiler connected to the three-point link hitch mechanism of the tractor, a ruler wheel is provided along the forward direction on the left and right outer sides of the subsoiler frame in order to regulate the tilling depth. In addition, the left and right disc harrow mounting arms with the front end pivotally attached to the left and right of the center part of the subsoiler frame and the horizontal girder fixed to the middle part can be restricted to swing up and down behind the subsoiler along the forward direction. Project. A single-row disk harrow with a disc angle adjustable wider than the sub-soiler plowing width is horizontally installed at the rear ends of the left and right disc harrow mounting arms.

In order to limit the vertical swiveling movement of the left and right disc harrow mounting arms, the front end is fixed to the left and right of the front center of the subsoiler frame, and the rear end is projected to the intermediate portion of the subsoiler frame along the forward direction. Left and right horizontal beams are provided. The left and right horizontal beams are respectively provided with arm limit brackets facing left and right, and the arm limit brackets are provided with upper and lower insertion / removal pins so that their positions can be adjusted, and the left and right disc harrow mounting arms are connected to the arm limit brackets. The upper and lower insertion / extraction pins were inserted. In other words, the upper and lower surfaces of the left and right disc harrow mounting arms are in contact with the insertion / removal pins so that the vertical turning movement is restricted.

  At the rear end of the left and right disk harrow mounting arms, a disk harrow mounting arm is projected below, and a disk harrow mounting square frame is connected to the lower end of the arm, and a disk angle is formed below the disk harrow mounting square frame. An adjustable single row disc harrow was provided.

In order to tilt the single-row disc harrow forward and backward, the rear ends of the left and right disc harrow mounting arms and the left and right of the rear center of the disc harrow mounting square frame, respectively
A turnbuckle rod body with upper and lower ends connected was provided.

In addition, stands were provided on the left and right sides of the rear center of the disk harrow mounting rectangular frame so as to support the single row disk harrow by being reversed backward during storage and to be reversed forward during work.

The composite tillage device of the present invention can produce the soil improvement effect by crushing the soil and the subsoil below the paddle bottom by the subsoiler. Since the ruler wheels are provided on the left and right outer sides of the subsoiler, the plowing depth of the subsoiler can be kept constant, and the amount of soil dug up on the ground surface can be made substantially the same. Therefore, the amount of soil that the single row disk harrow behind the subsoiler crushed can be made substantially uniform, so that the crushed effect can be enhanced.

Moreover, the vertical pivotal movement restricted disc halo mounted arm, since wear in to limit the rise and fall of the single row disc halo, holding the floating disk halo, high appropriately maintained Harrow leveling effect Kofuka Can be bitten. Further, Sabusoira is backfilled Therefore soil single row disc halo drilling groove formed in the ground, can be made capable traveling without the field after installation wheels of farming tractor make a mistake.

The turnbuckle rod that connects the rear end of the left and right disc harrow mounting arms and the left and right middle of the rear portion of the disc harrow mounting square frame, when extended, the single row disc harrow faces upward, and when retracted, the single row disc harrow faces downward Therefore, the appropriate crushed soil can be formed by adjusting the horizontal state of the disk harrow.

Forward a single row disc halo, is provided with the rear invertible to stand, can be supported without giving any trouble to the tilling by previously forward reversed, the single-row disc halo over upright behind inversion on the ground .

  The sub soiler is connected to the three-point link hitch mechanism of the tractor, and one having a sub-soil shank at equal intervals on the left and right sides of the center is used. In the subsoiler, left and right disc harrow mounting arms are projected from the center of the subsoiler frame along the forward direction so as to protrude rearward of the subsoiler so as to be able to limit the vertical turning movement. A disk harrow mounting rectangular frame is horizontally placed below the disk harrow mounting arm, and a single row disk harrow is mounted below the frame.

  The single-row disc harrow has a plowing width larger than that of the subsoiler, is equipped with a flower-shaped disk, and the crushed soil is moved forward inward. Make a V-shaped arrangement. A rear end portion of the disk harrow mounting arm and a rear portion of the disk harrow mounting rectangular frame are connected by a turnbuckle bar so that the gang inclination of the gang relative to the advancing direction can be adjusted.

Next, embodiments will be described with reference to the drawings. An arrow F in the drawings showing the embodiment indicates the forward direction, and the left and right are displayed in the forward direction F unless otherwise noted.

1 is a plan view showing an embodiment of the apparatus of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a right side view of the same. In these figures, 1 is a composite tiller, 2 is a subsoiler, and 3 is a subsoiler frame. The subsoiler frame 3 is a steel pipe having a rectangular cross section, and the front frame is formed in an inverted U shape. The left side frame 18 and the right side frame 19 are horizontally inclined to the left and right of the sub frame, and the respective rear end portions thereof in the forward direction. Along the straight line.

Reference numerals 4 and 5 denote a left ruler wheel and a right ruler wheel of rubber tires, which are provided outside the left side frame 18 and the right side frame 19 in the forward direction, respectively. Reference numeral 20 denotes a ruler wheel mounting square tube, which is vertically welded to the end portions of the left and right side frames 18 and 19. A ruler wheel shank 21 is fitted in the ruler wheel mounting square tube 20 so as to be movable up and down. Reference numeral 22 denotes an axle, which is provided orthogonally inside the lower end portion of the ruler wheel shank 22 and supports the ruler wheels 4 and 5. Reference numeral 23 denotes a height adjustment bolt, which is provided so as to penetrate the ruler wheel mounting square tube 20 and the ruler wheel shank 22 in the lateral direction and fix the ruler wheels 4 and 5 at desired positions.

That is, the ruler wheels 4 and 5 can adjust the ground position so that the tilling depth H of the subsoiler 2 shown in FIG. 4 can be changed ± 10 cm from 50 cm as a standard. In FIG. 4, h is the maximum tillage depth of the single-row disk harrow 6.

Reference numeral 24 denotes a central shank beam, which is formed of a steel pipe having a rectangular cross section and is formed in a Y shape. The front end is pivotally attached to the left and right of the front center of the subsoiler frame 3 by a central shank beam mounting horizontal shaft 25, and the rear end is a subsoiler frame. 3 is located in the middle. A central shank 26 projects vertically downward from the rear end of the central shank beam 24. Reference numeral 27 denotes a left shank, which protrudes vertically downward from the rear end of the left shank beam 29. Reference numeral 28 denotes a right shank, which protrudes vertically downward from the rear end of the right shank beam 30.

As shown in FIG. 3, the left shank 27 has a shape in which an upper end protrudes upward from the left shank beam 29 and is concavely curved in the forward direction. Reference numeral 32 denotes a shank mounting sleeve, the upper end of which is welded to the lower surface of the left shank beam 29, and the left shank 27 is closely inserted and fixed with a shank bolt 33. Similarly, the central shank beam 24 and the right shank beam 30 are also provided with a shank mounting sleeve 32 at the rear end portion, and the central shank 26 and the right shank 28 are fixed thereto, respectively. The subsoiler 2 is provided with a central shank 26 at the front and a left shank 27 and a right shank 28 behind it at an interval of 70 cm so as to have the same tillage depth. That is, the tilling width of the subsoil 2 is 1.4 m and the tilling depth is a maximum of 60 cm.

The left shank beam 29 and the right shank beam 30 are each connected to the middle portion of the left side frame 18 and the right side frame 19 along the forward direction by a shank beam mounting horizontal shaft 31 using a steel pipe having a rectangular cross section. The central shank 26 can be swung up and down with the same radius around the shank beam mounting horizontal axis 25 and the left and right shanks 27 and 28 around the shank beam mounting horizontal axis 31, respectively.

2 and 3, reference numeral 34 denotes an earth repellent plate made of a rectangular steel plate, which is detachably attached along the concave curved surfaces of the central shank 26, the left side shank 27, and the right side shank 28. The upper end portion of the soil repellent plate 34 is located above the plowing depth of the sub soiler 2, and the front twisted portion formed on the left and right sides from the center portion releases the soil excavated left and right.

  In FIG. 3, a ground plate 35 is horizontally fixed to a central shank 26, a left shank 27, and a right shank 28, and a connecting bracket 36 is connected to a rear end portion thereof around a connecting bracket mounting pin 37 so as to be pivotable up and down. A crushing swing 39 is connected to a fork of the crushing swing at a rear end of the metal fitting 36 so as to be horizontally rotatable around a vertical axis 38.

In FIGS. 1 and 2, reference numeral 40 denotes a center mast, which is erected at the center of the upper surface of the front portion of the subsoiler frame 3 and has a branch arm 41 at the rear portion (see FIG. 3). Reference numeral 42 denotes a left mast that stands on the upper surface of the left side frame 18 in front of the left shank beam 29. Reference numeral 43 denotes a right mast, which stands on the upper surface of the right side frame 19 in front of the right shank beam 30. The upper part of the branch arm 41, the left mast 42, and the right mast 43 protrudes in the same shape at the rear, and has the same height.

The center mast 40 and the left and right masts 42 and 43 are provided such that the steel plates are erected from the left and right, and gradually narrow upward from the lower part of the wide interval, and the upper part is opposed in parallel. In FIG. 2, reference numeral 44 denotes a mast spacer, which holds the distance between the left and right plates facing the center mast 40, the left mast 42, and the right mast 43. Reference numeral 45 denotes an upper link pin that is attached to and detached from the upper portion of the center mast 40. The upper link U of the three-point link hitch mechanism of the tractor removably connects the rear end portions thereof.

Reference numerals 46 and 47 denote cross shaft brackets, which are attached to the left and right of the front center of the subsoiler frame 3 so as to hang down, and a cross shaft 48 is horizontally attached to the lower end portion. A lower link L of a three-point link hitch mechanism of the tractor is detachably connected to the lower link pins 49 at both ends of the cross shaft 48 (see FIGS. 1 and 3).

A shock absorber 50 is connected to the tops of the branch arm 41, the left mast 42, and the right mast 43 of the center mast 40, and is connected to hydraulic accumulators 53 provided on the upper surface of the subsoiler frame 3, respectively. The top is connected. Reference numeral 51 denotes a piston rod of the shock absorber 50, and terminal portions thereof are fixed to a bifurcated bracket 52 fixed to the front of the central shank 26, the left shank 27, and the right shank 28 of the center beam 24 and the left and right shank beams 29 and 30, respectively. It is pivotally attached. The bifurcated bracket 52 is erected at the same position from the central shank beam mounting horizontal shaft 25 and the shank beam mounting shaft 31.

The shock absorber 50 is partitioned into a high-pressure gas chamber and an oil chamber by a free piston provided in the cylinder, and absorbs vibration caused by a change in excavation resistance applied to the subsoil shank, thereby enabling stable excavation of the subsoiler. Further, when the subsoiler shank collides with an underground obstacle, the piston rod contracts to prevent the shank from being damaged.

  Next, in FIGS. 1 and 4, reference numerals 10 and 11 respectively denote a left horizontal beam and a right horizontal beam of a rectangular steel pipe, and the front end portion of the left side frame 18 and the right end beam are equidistant from both outer sides of the central shank beam 24. The rear end is fixed to the right side frame 19 and protrudes at the same position near the rear end of the subsoiler frame 3 along the forward direction. In FIG. 4, the left horizontal beam 10 has a horizontal beam mounting bracket 57 projecting downward from the left side frame 18, and a front end portion is fixed by a plurality of horizontal beam mounting bolts 58. Similarly, the right horizontal beam 11 is fixed to the right side frame 19.

Reference numerals 94 and 95 in FIG. 1 denote a left extended horizontal beam and a right extended horizontal beam projecting to the left and right of the front portion of the subsoiler frame 3, and a rolling colter 59 is attached thereto. The rolling colter 59 is also attached to the right side of the central shank beam 24. The rolling colter 59 is a known one that can swing around a vertical axis, and is provided in front of the central shank 26, the left shank 27, and the right shank 28, respectively.

  In FIGS. 1 and 4, reference numeral 12 denotes an arm limiting bracket. A plate body having a base end portion fixed to the left horizontal beam 10 and the right horizontal beam 11 by a plurality of arm limiting bracket bolts 60 is provided so as to face left and right. Yes. Reference numeral 61 denotes an arm restriction adjusting hole, which is provided with a plurality upward from the lower part of the arm restriction bracket 12 and vertically penetrates the insertion / removal pins 13.

Referring also to FIG. 4, reference numeral 62 denotes an arm mounting bracket that is erected on the upper surface of the left side frame 18 so as to be opposed to the left and right. Reference numeral 7 denotes a left disk harrow mounting arm having a rectangular steel pipe, and is connected to the inside of the arm mounting bracket 62 via an arm mounting shaft 63 so as to be pivotable up and down. Reference numeral 8 denotes a right disk harrow mounting arm of a rectangular steel pipe having a front end connected to the right side frame 19 in the same manner as the left disk harrow mounting arm 7 so that it can be swung up and down. Reference numeral 9 in FIG. 1 denotes a cross beam fixed between the disk harrow mounting arms 7 and 8 so as to operate integrally.

The left disk harrow mounting arm 7 and the right disk harrow mounting arm 8 are each provided with a disk harrow mounting arm 14 projecting downward at the rear. 15 is a disk halo mounting rectangular frame, it is erected a square frame bracket 64 fitted into the lower end of the disk halo mounting arm 14 to the front end in the left-right opposed. The disk harrow rectangular frame 15 is horizontally connected to the rectangular frame bracket 64 via a disk hello mounting arm connecting pin 65.
The disk harrow mounting rectangular frame 15 has a lateral width smaller than the lateral width of the single row disk harrow 6 and is formed in a square shape with channel steel.

In FIGS. 1 and 3, reference numeral 16 denotes a turnbuckle rod body, the upper end of which is pivotally attached to the rear ends of the left and right disc harrow mounting arms 7 and 8, and the lower end of the disc harrow mounting rectangular frame 15 at the center of the rear portion. It is pivotally attached to a turnbuckle rod connecting projection 66 projecting left and right. When the turnbuckle bar 16 is extended and retracted, the disk harrow mounting rectangular frame 15 faces upward and downward around the disk harrow mounting arm connecting pin 65. That is, the turnbuckle bar 16 is used to level the disk harrow mounting rectangular frame 15 upward or downward when the vertical movement of the disk harrow mounting arms 7 and 8 is restricted.

6 is a single row disk harrow, which is mounted horizontally below the disk harrow mounting rectangular frame 15 and the disc angle can be adjusted. In FIG. 5, 67 is a left gang frame, and 68 is a right gang frame showing a part thereof. In FIG. 5, reference numeral 69 denotes a gang arm, which protrudes on the inner side of the left and right gang frames 67 and 68 above the extension line of the gang bolt 71 that connects the flower disk 70 of the single row disk harrow 6 to the skewer. ing. Reference numeral 72 denotes a gang attachment hole provided at the tip of the gang arm 69. 73 is an end washer, and 74 is an interval cylinder. Reference numeral 75 denotes a gang nut, which is welded to the back surface of the outer frame portion of the left gang frame 67 above the center line of the gang bolt 71. Reference numeral 76 denotes a disk angle adjusting hole whose center coincides with the screw hole of the gang nut 75.

In FIGS. 1 and 6, reference numeral 77 denotes a gang mounting plate fixed to the center of the disk mounting rectangular frame 15, and the gang arm 69 described in FIG. 5 inserts a gang mounting bolt / nut 78 into the gang mounting hole 72. (Refer to FIG. 7) Left and right gang frames 67 and 68 are rotatably attached to the disk harrow attachment rectangular frame 15. Reference numeral 79 denotes a rectangular frame outer frame portion, which is provided with a plurality of disk angle adjusting holes 81 forward from a gang angle adjusting bolt 80 (see FIG. 8) that is detachably provided above the gang bolt center line.

  The disc angle adjusting hole 81 is drilled at a position of 5 degrees and 10 degrees forward on the arc parallel to the gang bolt 71 on the arc centered on the gang mounting bolt / nut 78. . In other words, the left gang frame 67 and the right gang frame 68 can be adjusted to a disk angle with a V-shaped arrangement in the forward direction. The aforementioned 5 degrees and 10 degrees may be changed to an appropriate angle.

In FIGS. 6 and 8, reference numeral 82 denotes a disk bearing, and a gang bolt 71 having a square cross section passes through the center of the inner bearing spacing cylinder 83. 8 is a gang post, which has a lower end fixed to the desk bearing 82 and an upper end connected to the left gang frame 67 via a column connecting vertical bar 96. As shown in FIG. 2, the left and right gang frames 67 and 68 are provided with two disk bearings 82 and four spacing cylinders 74, respectively, and seven flower discs 70 are disposed at a spacing of 20 cm. The tillage width of the row disc harrow 6 is 2.8 m. The flower-shaped disk 70 has a diameter of 60.5 cm and a concave surface disposed inward with respect to the forward direction.

1 and 7, reference numeral 85 denotes a scraper bar, which is provided with a scraper 86 which is bolted along the rear surfaces of the left and right gang frames 67 and 68, and scrapes off the adhered soil on the inner surface of each flower disk 70. is doing. In FIG. 7, 71 is a gang bolt and 87 is a gang bolt nut.

  Referring to FIGS. 1 and 3, reference numeral 88 denotes a stand mounting bar, the rear end of which protrudes rearward of the disk harrow mounting rectangular frame 15, and the disk harrow mounting arms 7 and 8 are respectively moved in the forward direction. It is fixed to the disk harrow mounting rectangular frame 15 on the outside. Reference numeral 17 denotes a stand. The upper end of the stand is pivotally attached to the rear end of the stand mounting bar 88 by a stand mounting bolt 89, and as shown in FIG. The disc harrow mounting rectangular frame 15 is turned upside down and placed on the upper surface of the rectangular harrow 15 so as not to hinder the work.

  The stand 17 has a bottom plate 90 fixed horizontally at its lower end to increase the support area. In order to adjust the height, a stand telescopic rod 91 provided with a plurality of adjustment holes is fitted into the stand outer cylinder 92, and a stopper plug 93 is passed through the stand outer cylinder 92 and the adjustment hole. The height can be adjusted.

FIG. 9 is a vertical front view of a vertical type when excavating in the device of the present invention. In FIG. 9, the central shank 26, the left shank 27, and the right shank 28 of the subsoiler 2 connected to a three-point link hitch mechanism of a tractor (not shown) crush the soil 97, the dredge bottom 98, and the subsoil 99 at a tilling depth H. . At the same time, the soil repellent plate 34 attached to the front surface of these shanks releases the excavated soil S from the excavation groove T to the ground surface.

FIG. 10 is a schematic longitudinal cross-sectional front view at the time of the crushing action. In the field plowed by the subsoiler 2 as shown in FIG. 9, the single-row disc harrow 6 following the subsoiler 2 crushes the soil at the plowing depth h, and fills the crushed soil into the subsoil excavation groove T indicated by a dotted line. After plowing, the soil is crushed in one stroke by the soil improvement by the subsoiler and the soil leveling by the single row disk harrow.

The device of the present invention can be used to improve the cultivated soil of the cultivated land, and when converting the paddy field to field cropping, it is suitable for crushing the hard paddle bed to improve moisture and air penetration and leveling. . And since the subsoil is backfilled with excavated soil in the vertical grooves formed in the ground, and the ground can be prevented so that the wheels do not get wet when the farming tractor travels, the utility in agricultural work is high.

It is a top view which shows embodiment of this invention apparatus. It is also a front view. Similarly, it is a right side view. It is a right view which shows typically the relationship of the principal part. It is a principal part top view of a single row disk harrow. It is a principal part top view for demonstrating disk angle provision of a single row disk harrow. It is a longitudinal cross-sectional view of the AA arrow of FIG. It is a longitudinal cross-sectional view of the BB line arrow of FIG. It is a vertical vertical front view at the time of excavation in the device of the present invention. It is a model longitudinal front view similarly at the time of crushed soil.

Explanation of symbols

1 Combined tillage device
2 Subsoiler
3 Subsoiler frame
4 Left ruler wheel
5 Right ruler ring
6 Single row disc harrow 7 Left disc harrow mounting arm 8 Right disc harrow mounting arm
9 Horizontal girder
10 Left horizontal beam
11 Right horizontal beam
12 Arm Limit Bracket 13 Insertion / Removal Pin 14 Disc Harrow Mounting Arm 15 Disc Harrow Mounting Square Frame 16 Turnbuckle Bar 17 Stand 18 Left Side Frame 19 Right Side Frame
61 Arm limit adjustment hole
62 Arm mounting bracket 63 Arm mounting shaft 67 Left gang frame 68 Right gang frame 69 Gang arm 70 Flower disk 76 Disc angle adjustment hole 77 Gang attachment plate 78 Gang attachment bolt / nut 80 Disc angle adjustment bolt 81 Disc angle adjustment Hole 88 Stand mounting bar

Claims (5)

In the subsoiler connected to the three-point link hitch mechanism of the tractor, the left and right ruler wheels provided along the forward direction on the left and right outer sides of the subsoiler frame, and the front end portion pivoted to the left and right of the front center of the subsoiler frame The left and right disc harrow mounting arms projecting so as to limit the vertical swivel movement behind the subsoiler along the direction and the horizontal beam is fixed to the middle part, and the plowing width is made wider than the plowing width of the subsoiler, A composite tilling device comprising a single row disk harrow horizontally disposed below the rear end portion of the disk harrow mounting arm. The left and right disc harrow mounting arms fix the front end to the left and right of the front center of the subsoiler frame, and the left and right horizontal beams projecting to the middle of the subsoiler frame along the forward direction, 2. The compound tillage device according to claim 1, wherein arm limit brackets are erected on the left and right sides of the arm limit brackets, and insertion / removal pins are provided on the upper and lower sides of the arm restriction brackets so as to adjust the position. The single row disk harrow connects a disk harrow mounting rectangular frame perpendicular to the advancing direction and horizontally to a lower end of a disk harrow mounting arm projecting downward from rear ends of the left and right disk harrow mounting arms. 3. The compound tillage device according to claim 1 or 2, which is disposed below the disk harrow mounting square frame so that the disc angle can be adjusted. The turnbuckle rod body which connected the upper and lower end part to the rear end part of the said left and right disk harrow mounting arms and the right and left of the rear center of the disk harrow mounting rectangular frame, respectively, is provided. Combined tillage equipment.   5. The composite tillage device according to claim 1, wherein a stand that can be adjusted in height is provided on the left and right sides of the rear center of the disk harrow mounting square frame so as to be able to be reversed forward and backward.

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