JPS6111334Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is an earth removal device that is towed by a traveling machine such as a tractor and excavates an excavated trench using an auger screw-type excavation blade when constructing underdrains. This invention relates to an excavating machine for excavating trenches.

Nowadays, intensive agriculture has developed to maximize the use of farmland, and when converting rice paddies into fields, it is not acceptable to do so in order to achieve stable, high yields of crops and labor-saving production through mechanization. Improving soil drainage has become particularly important and indispensable in order to address soil moisture characteristics, reduce field abrasion, and improve work efficiency and precision in soil crushing.
Drainage improvement methods using culvert drainage are generally used to improve the drainage of this soil, but in order to excavate the excavated trench during culvert construction, an auger screw-type excavation blade is equipped and a tractor or other vehicle is used. Excavation machines that are towed by a traveling body are known.
This device is widely used because it has a simple structure and is inexpensive. However, since the depth of this excavation trench is adjusted by vertically adjusting the entire excavating machine, if the soil removing device is attached to the excavating machine, the soil removing device will sink into the field. It is not possible to equip an excavator with an earth removal device, and as a result, the excavator being lifted in front of the excavator blade not only reduces the excavation performance of the excavator blade, but also increases the traction resistance, making it difficult for agricultural tractors to remove soil. This had the disadvantage that the traveling body of the machine would slip, reducing work efficiency. Furthermore, if the earth removal device is installed separately from the excavation blade, the structure would be complicated, and when excavation work is not being performed, the earth removal device alone must be moved up and down or removed. However, it has the disadvantage of being cumbersome to operate and resulting in poor work efficiency.

The present invention was devised in order to eliminate these drawbacks in view of the above-mentioned actual situation, and although it is equipped with an auger screw type excavation blade, it is not attached to the fuselage frame on which the excavation blade is hung vertically. An earth removal device that can be adjusted up and down along the excavation blade is integrally provided, and the earth removal device can be kept at a predetermined position with respect to the field regardless of the depth of the excavation trench being adjusted by adjusting the vertical movement of the entire excavation machine. The excavator who has been placed in position and lifted in front of the excavator blade can reliably eject the soil to the side.Moreover, when the excavator is not working, if the excavator is moved upward, the excavator will also automatically move upward. It is an object of the present invention to provide an excavating machine for excavating trenches.

The structure of the present invention will be explained with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a traveling machine body consisting of an agricultural tractor, and a rear part of the traveling machine body 1 is connected to a lifting link mechanism 2 for carrying out excavation work. A machine 3 is installed so that it can move up and down. A gear case 5 is mounted on the body frame 4 of the excavating work machine 3, and an input shaft 6 protruding from the gear case 5 and a movement take-out shaft 1a on the traveling machine body 1 side are connected to a power transmission shaft 7. They are interlocked and connected through.

Reference numeral 8 denotes an auger screw type excavating blade whose shaft center is directed in the vertical direction, and the excavating blade 8 is connected and fixed to an output shaft 9 vertically disposed from the gear case 5. Further, at the rear of the body frame 4, a semi-cylindrical excavator blade case 10 is vertically installed along the rear outer periphery of the excavator blade.

An earth removal device is integrally attached to the front part of the machine frame 4, and is located in front of the excavation blade 8 and discharges the excavated soil lifted by the excavation blade 8 to the side of the excavation trench. There is. The configuration of the soil removal device will be explained in detail below.

Reference numeral 11 denotes a bearing case installed on one side of the gear case 5, and a drive pulley 13 is provided on a drive shaft 12 extending from the bearing case 11. Reference numeral 14 denotes a rocking plate whose base end is pivotally attached to the bearing case 11 so as to be able to swing freely around the drive shaft 12, and the tip end of the rocking plate 14 is perpendicular to the fuselage frame 4. It is interposed in an overlapping manner between the fixed support plate 15 and a base end 16a of an adjustment plate 16, which will be described later. And support plate 1
5 is bored with an arcuate elongated hole 17 in the front-rear direction corresponding to the rotation locus of the tip of the swing plate 14, and a linear elongated hole 18 in the vertical direction intersecting the arcuate elongated hole 17. . A fixing member 19 such as a bolt is inserted into the arc-shaped elongated hole 17 and inserted into through holes 17a and 17b formed at the distal end of the swing plate 14 and the base end 16a of the adjustment plate 16. On the other hand, the linear elongated hole 18 has a through hole 1 bored at the tip 16b of the adjustment plate 16.
The above-mentioned fixing tool 19 is inserted through 8a. Then, when the fixing devices 19, 19 are loosened, the soil removal helical blade 20, which will be described later, provided at the tip 16b of the adjustment plate 16 can be freely adjusted in the vertical direction approximately along the excavation blade 8.

Reference numerals 21 and 22 denote intermediate pulleys pivotally attached to the base end 16a of the adjustment plate 16, and 23 denotes a driven pulley pivotally attached to the distal end 16b.
2, 23 and the drive pulley 13 are equipped with an endless belt 2.
4 is hanging. Rotating shaft 2 of intermediate pulley 21
1a is screwed to an adjusting screw 25 fitted to the base end 16a of the adjusting plate 16, and by adjusting the adjusting screw 25, the intermediate pulley 21 is adjusted to the position of the other intermediate pulley 2.
It can be adjusted forward and backward in two directions. The earth removal helical blade 20 is interlocked with the shaft of the driven pulley 23, and the earth removal helical blade 20 is connected to the excavation blade 8.
The excavation blade 8 is placed horizontally in the left-right horizontal direction so as to convey the excavated soil A lifted forward to one side of the excavation groove B and discharge the excavated soil A.

Next, the operation of the present invention constructed as described above will be explained. First, in order to excavate an excavation groove B of a predetermined depth, the power take-off shaft 1a is driven and rotated while the excavation working machine 3 is fixed in a predetermined position by the lifting link mechanism 2, as shown in FIG. As the traveling machine body 1 advances, an excavation groove B is excavated in the soil by an auger screw type excavation blade 8. At this time, if the soil removal helical blade 20 is adjusted in advance to a position where it touches the field, the excavating blade 8
The excavated soil A lifted forward is excavated by the helical blade 20.
The soil is discharged to one side of the excavation trench A.

On the other hand, when changing the depth of the excavation groove 8, the depth of penetration of the excavation blade 8 into the soil is adjusted by adjusting the lifting linkage mechanism 2 to adjust the vertical movement of the entire excavation work machine 3. In this case, Fixture 1
9 and 19 and adjust the earth removal helical blade 20 up and down approximately along the excavation blade 8 to position it so that the earth removal helical blade 20 is in contact with the field surface, and then remove the fixing tool 1.
If 9 and 19 are tightened and fixed again, the excavated soil A will be discharged to the side of the excavated trench B in the same manner as described above. That is, when the fixtures 19, 19 are loosened, the adjustment plate 16 swings back and forth around the drive shaft 12, and also moves up and down while being regulated by the straight long hole 18 around the fixture 19 on the arcuate long hole 17 side. Since it is oscillated, the helical earth removal blade 20 moves up and down approximately along the excavation blade 8 in the approximately vertical direction. Therefore,
Even when the excavation depth is changed, the earth removal helical blade 20 can be positioned in contact with the field surface by simple operation, and even when the auger screw type excavation blade 8 is used, the excavation blade 8 Excavated soil A lifted forward can be discharged regardless of changes in excavation depth.

Furthermore, when adjusting the soil removal helical blade 20 up and down, the endless belt 24 is always maintained in a tensioned state because one intermediate pulley 21 moves forward and backward in the direction of the other intermediate pulley 22 by adjusting the adjustment screw 25. Therefore, the soil removal helical blade 20 can be driven in an optimal state. When not excavating, the excavating machine 3 is connected via the lifting link 2.
If the earth removal device is moved upward by a large amount, the earth removal device also moves upward, so there is no need to operate only the earth removal device separately.

In the above embodiment, the excavated soil A is discharged to one side by the helical blade 20, but it is also possible to reverse the helical direction from the center and discharge the soil to both left and right sides. Of course, it is okay to
In short, it is sufficient if the excavated soil A is discharged to the side of the excavated trench B.

In short, the present invention provides an excavation work machine for excavating trenches that is equipped with an auger screw type excavation blade in the vertical direction and is towed by a traveling machine such as a tractor. A soil removal device is integrally installed to discharge the excavated soil lifted in front of the excavation blade to the side of the excavation trench, and the soil removal device can be moved and fixed in the vertical direction approximately along the excavation blade. Therefore, although an auger screw-type excavation blade was installed and the depth of the excavation groove was adjusted by adjusting the vertical movement of the entire excavation machine, the machine equipped with the excavation blade The earth removal device integrated into the frame can be adjusted up and down approximately along the excavation blade, so the earth removal device can be positioned at a predetermined position relative to the field regardless of the depth adjustment of the excavation groove. The excavated soil lifted in front of the blade can be reliably discharged to the side where it does not get in the way of the excavation blade. Moreover, when the work is finished, the soil removal device can be moved up by moving it up. Since it can be moved up and down, there is no need to separately operate the soil removal device, and the efficiency of the work can be significantly improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the excavating machine for excavating trenches according to the present invention, in which Fig. 1 is an overall side view of the excavating machine, Fig. 2 is a rear view of the same essential parts, and Fig. 3 is a diagram showing the main parts of the excavating machine. FIG. 4 is an enlarged view of the main part, FIG. 4 is an explanatory diagram of the operation, and FIG. 5 is an enlarged view of the main part. In the figure, 3 is an excavation work machine, 8 is an excavation blade, 20 is an earth removal spiral blade, A is excavated soil, and B is an excavation groove.

Claims (1)

[Scope of utility model registration request] Equipped with a vertical auger screw type digging blade,
In an excavation machine for excavating a trench that is towed by a traveling machine such as a tractor, the excavated soil lifted in front of the excavation blade is discharged to the side of the excavation trench on the machine frame on which the auger screw type excavation blade is vertically installed. 1. An excavating machine for excavating trenches, characterized in that an earth removing device is integrally mounted thereon, and the earth removing device is movable and fixed in a vertical direction substantially along an excavating blade.