JP2005194829A - Trench opening device for drainage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trench opening device capable of securely draining water accumulated on the surface of a soil in a field. <P>SOLUTION: A subsoiler 16 is connected to the rear of a towing vehicle 1 through a link mechanism 15 and a dish-like disk 34 is installed at the rear of the subsoiler 16 so that the direction of the disk 34 relative to the advancing direction can be changed and adjusted. The direction of the disk 34 can be changed and adjusted by an actuator 42 such as a hydraulic cylinder or an electric cylinder. Also, a plurality of trench opening units U formed of the subsoilers 16 and the disks 34 are installed in the lateral direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a groove opening device for draining water accumulated on the soil surface of a farm field.

  It is known that a subsoiler is connected to the rear part of a tractor for draining rainwater or the like that accumulates on the soil surface of a farm field, and a vertical groove for drainage is formed in the soil while pulling the subzoiler.

  For example, Patent Document 1 describes a vibrating subsoiler, which operates an eccentric cam mechanism to vibrate the subsoiler in small increments in the front-rear direction to form a culvert while excavating the soil.

  In this Patent Document 1, a dish-shaped disc is rotatably provided just before the subsoiler, and the soil surface is cut by this disc.

  This disc not only cuts rice straw and weeds scattered on the surface of the field, but also cuts the surface of the field before the blade of the subsoiler passes wide, into the vertical groove formed by the blade of the subsoiler. It has the effect of increasing the drainage by inducing water that accumulates on the surface.

  However, since this disk is located in front of the subsoiler, there is a drawback that the raised portions on both sides of the longitudinal groove formed by the passage of the blade of the subzoiler cannot be cut with this disk.

Moreover, since the direction of the disk with respect to the traveling direction is fixed in the one described in Patent Document 1, the direction of the lateral movement of the shaved soil cannot be changed.
JP-A 63-91001

  An object of the present invention is to provide a simple drainage groove opening device that can reliably drain water accumulated on the soil surface of a field and that can easily change the direction of a disk between an outward path and a return path.

  According to the first aspect of the present invention, the subsoiler 16 is connected to the rear portion of the tow vehicle 1 via the link mechanism 15, a dish-like disk 34 is provided behind the subsoiler 16, and the direction of the disk 34 with respect to the traveling direction is changed. The drainage groove opening device is configured to be adjustable.

  The invention according to claim 2 is the drainage groove opening device according to claim 1, wherein the means for changing the direction of the disk 34 is constituted by an actuator 42 such as a hydraulic cylinder or an electric cylinder.

  The invention according to claim 3 is the drainage groove opening device according to claim 1, wherein a plurality of groove opening units U including the subsoiler 16 and the disk 34 are provided in the left-right direction.

  According to the first aspect of the present invention, the soil rising portion D formed when the blade 22 of the subsoiler 16 passes through the soil is reversed by the disk 34 passing behind the soil, and the soil is moved sideways. Therefore, there is no raised portion on one side of the vertical groove M formed by the blade body 22, and water can easily enter the vertical groove M, so that the drainage of the field surface can be improved. In addition, since the direction of the disk 34 with respect to the traveling direction can be changed between the forward path and the return path, there is no problem that water accumulated on the field surface does not escape, and the field surface is obtained by inverting the disk 34 in the direction desired by the operator. Water can be drained reliably.

  In the invention of claim 2, since the means for rotating the disk 34 is constituted by an actuator 42 such as a hydraulic cylinder or an electric cylinder, for example, using an external hydraulic pressure take-out mechanism of a tow vehicle such as the tractor 1, Alternatively, the actuator 42 can be easily operated by a battery power source, and the mechanism for changing the orientation of the disk 34 can be simplified.

  According to the invention of claim 3, since a plurality of groove opening units U including the subsoiler 16 and the disk 34 are provided in the left-right direction at the rear part of the machine body, many drainage grooves are formed in one operation. Therefore, the grooving operation can be performed efficiently.

  A subsoiler and a disc are provided in this order at the rear of the tractor body, and a groove opening device is provided that allows the operator to turn the disc on either the left or right side while riding on a towing vehicle when reciprocating in the field.

  Embodiments of the present invention will be described with reference to the drawings. 1 is a conventionally known tractor having front wheels and rear wheels 2 and 2 (not shown), which transmits the rotational power of the engine mounted on the front of the fuselage to the transmission in the transmission case 3, and the rotational power decelerated appropriately by the transmission. It is configured to transmit to the front wheels and the rear wheels 2 and 2. A hydraulic cylinder case 4 is fixed to the upper part of the transmission case 3 constituting a part of the vehicle body, and lift arms 5 and 5 are pivotally attached to both left and right sides of the hydraulic cylinder case 4. The lift arms 5 and 5 are turned up and down by turning the hydraulic control lever 7 in the up and down direction or by operating a lift switch (not shown). A valve 8 for taking out external hydraulic pressure is provided on one side of the hydraulic cylinder case 4 in the left-right direction, and the oil path of this valve 8 is switched by operating an external hydraulic control lever 9 in the front-rear direction. As will be described later, by operating the external hydraulic operation lever 9 in the front-rear direction, a double-acting cylinder mounted on an external device (for example, a front loader hydraulic device) can be expanded and contracted.

  Reference numerals 10 and 10 denote lower links. Lift rods 12 and 12 are connected between the lower links 10 and 10 and the lift arms 5 and 5, and the lower links 10 and 10 and the top link 13 are connected to each other. A subsoiler 16 is connected to the rear portion of the three-point link mechanism 15 so as to be movable up and down.

  A machine frame 17 that supports the subsoiler 16 includes main frames 17a and 17a along the front-rear direction, masts 17b and 17b that stand up at the front of the main frames 17a and 17a, and left and right directions at the rear of the main frames 17a and 17a. The sub-frames 20 and 20 made of two plates are fixed to the central portion of the square pipe 18, and the blade body 22 of the sub-soiler 16 is attached to the sub-frames 20 and 20. Is fixed.

  A cylindrical body 25 is fixed to the rear part of the support frames 23, 23 fixed integrally therewith at the upper part of the blade body 22, and a support column 27 that rotates around the vertical axis S in the cylindrical body 25. (See FIG. 3). A fork portion 28 is provided at the lower portion of the support column 27, and a rotating shaft 32 is pivotally supported via a bearing 30 at the lower end on one end side of the fork portion 28, as shown in FIG. A scraper 36 is fixed to the lower end of the other end of the fork portion 28 so as to approach the curved surface 34a of the disk 34.

  A disc-shaped plate 38 is integrally fixed to the upper portion of the column 27, and the double-acting hydraulic cylinder 42 is disposed on the plate 38 via two link pieces 39, 40 that are bent in a square shape. The end is attached.

  More specifically, as shown in FIG. 2, the rear end portion of one link piece 39 is pivotally attached to the disc plate 38 by a pin 51, and the other link piece 40 is fixed to the side fixed integrally with the cylindrical body 25. The link pieces 39 and 40 are pivotally connected to each other by a pin 53.

  The front end portion of the hydraulic cylinder 42 is pivotally attached to the front end portion of the upper surface of the base 44 fixed to the cylindrical body 25, and the rear end portion of the piston rod 42 a of the hydraulic cylinder 42 is connected to the two link pieces 39 by the pin 53. , 40 together.

  As the hydraulic cylinder 42 expands and contracts, the support column 27 is rotated around the vertical axis S, so that the direction of the disk 34 (angle with respect to the traveling direction of the disk 34 when viewed from the plane) is changed. FIG. 2 shows a state where the disk 34 is rotated around the vertical axis S. FIG. When the piston rod 42a of the hydraulic cylinder 42 is extended, the disk 34 is tilted so that the curved concave portion is directed to the left front as shown by the solid line in the figure. The disk 34 is rotated so that the curved concave portion faces right front. The hydraulic cylinder 42 is connected to an external hydraulic pressure take-off valve 8 via a hydraulic hose (not shown), and the piston rod 42a of the hydraulic cylinder 42 is expanded and contracted by operating the external hydraulic operation lever 9. Is.

  FIG. 4 shows the operation when the groove forming operation is performed using this single subsoiler 16. In FIG. 4, first, the disk 34 is tilted to the position indicated by the phantom line, and the aircraft is advanced in this state (outward path). A vertical groove M is formed by the blade body 22 of the subsoiler 16, and when the blade body 22 advances, the embankment portions D formed on the left and right sides of the vertical groove M are moved to the right side of the groove by the subsequent rotation of the disk. (The state of (1) in FIG. 4). In addition, the arrow of FIG. 4 shows the advancing direction of the tractor 1.

  When the traveling direction of the tractor 1 is changed at the end of the field, the direction of the disk 34 is changed as indicated by the solid line in FIG. In this case, the fill portion D is moved to the left side of the groove M, and as a result, the relationship between the vertical groove M and the fill portion D is in the state of (2) in FIG. When the direction of the disk 34 is changed between the forward path and the return path and the groove opening operation is performed, the state shown in FIG. 4 is obtained. As a result, the water accumulated in the field flows from the left to the right in FIG. It is drained.

  Next, the configuration of the second embodiment shown in FIGS. 5, 6, and 7 will be described.

  In the second embodiment, two sets of groove opening units U each including a subsoiler 16 and a disk 34 are provided. Parts having the same configuration as in the first embodiment will be denoted by the same reference numerals, and only components having different configurations will be described with different reference numerals.

  The major difference in configuration from the first embodiment is that the groove opening unit U can slide on the square pipe 18 to adjust the width of the left and right groove opening units U, and when the disk 34 is not used. This is the point that the subsoiler can be grooved by jumping up.

  As shown in FIG. 5, a rotating horizontal shaft 48 is provided at the rear end of the support frame 23 integral with the blade body 22 so that the cylindrical body 25 rotates up and down around the rotating horizontal shaft 48. It is composed. In the second embodiment, the column 27 inserted into the cylindrical body 25 does not rotate around the vertical axis S, and the disk 34 is alternatively retracted upward or rotated downward. Make a move. That is, the disk 34 is rotated up and down by extending and contracting the piston rod of the hydraulic cylinder 49 provided between the support frame 23 and the upper portion of the cylindrical body 25.

  In FIG. 5, when the piston rod 49a of the hydraulic cylinder 49 is shortened, the disk 34 retracts upward as shown by the phantom line, and conversely, when the piston rod 49a of the hydraulic cylinder 49 is extended, the disk 34 descends as shown by the solid line. And become a regular working posture. When adjusting the distance between the two sets of groove opening units U, first, the bolt 60 is loosened, the groove opening unit U is slid laterally on the square pipe 18, and the bolt 60 is tightened again at a desired position. And fix.

  FIG. 7 shows a state in which the groove forming operation is performed using the two sets of groove opening units U. First, in the case of performing a grooving operation in the forward path, only the left disk 34 is lowered in the traveling direction, and the right disk 34 is retracted upward. When the aircraft is advanced in this state, the vertical groove M formed by the blade body 22 of the left subsoiler and the soil D that has risen on both the left and right sides of the blade 22 move from the left to the right side of the blade 22 by the disk 34 behind it. Is done. Since the right disk 34 is flipped upward, a small embankment D is formed on the left and right of the groove after the sub soiler has passed.

  When the vehicle reaches the end of the field and travels in the return path (2) while changing the traveling direction of the aircraft, the left disk 34 is flipped upward, and only the right disk 34 is lowered to advance the aircraft.

  In this case, the embedding portions D formed on the left and right sides of the right vertical groove M are moved to the left side of the vertical groove M, and the embankment portions are formed on the left and right sides of the vertical groove M after passing through the left subsoiler 16. D is formed. FIG. 7 shows the work trace as seen from one direction. The water accumulated on the field surface is drained from the left to the right in the figure and drained into the vertical groove M.

It is a side view of the whole tractor and groove opening unit. It is a top view of the principal part. It is a rear view of the principal part. It is sectional drawing of the agricultural field after an operation | work. It is a side view of 2nd Example. FIG. It is sectional drawing of the agricultural field after an operation | work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tractor 2 Rear wheel 3 Mission case 4 Hydraulic cylinder case 5 Lift arm 15 Three-point link mechanism 16 Subsoiler 22 Blade body 25 Cylindrical body 34 Disc 36 Scraper S Vertical axis M Vertical groove D Filling part

Claims (3)

  A subsoiler 16 is connected to the rear portion of the tow vehicle 1 via a link mechanism 15, a dish-like disk 34 is provided behind the subsoiler 16, and the direction of the disk 34 with respect to the traveling direction can be changed and adjusted. Drain opening device for drainage.   2. The drainage groove opening device according to claim 1, wherein the means for changing the direction of the disk comprises an actuator such as a hydraulic cylinder or an electric cylinder.   The drainage groove opening device according to claim 1, wherein a plurality of groove opening units (U) including the subsoiler (16) and the disk (34) are provided in the left-right direction.

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