JPH0568572B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to the case where trench excavation work is carried out using a trench digging machine which is constructed by providing digging teeth on the circumferential surface of an endlessly rotating chain or the circumferential surface of a rotating large-diameter wheel. The present invention relates to a soil removal method for carrying excavated soil dug up by the excavation teeth of the trench excavator to the side of the trench excavator, and improvements to the soil removal auger used to carry out the soil removal method.

As shown in Figure 1, when harvesting rhizomes M such as burdock and yam grown in the field, drilling teeth are formed on the circumferential surface of a large-diameter wheel or the circumferential surface of an endlessly rotating chain a. Cultivation is carried out by attaching a trench excavator A consisting of a... to a freely moving body such as a tractor T, and using the endlessly rotating digging teeth b of the trench excavator A. A groove W having a width corresponding to the tooth width of the excavating teeth b is excavated and formed at a position adjacent to the row of rhizomes M, and the rhizomes M are excavated using the formed groove W. measures are being taken.

By the way, when trenching machine A is used to excavate and shape a trench W for harvesting rhizomes M, the excavated soil dug up by the endlessly rotating digging teeth b of trenching machine A is left as is. If this is done, the excavated soil that is being dug up in front of trench excavator A in the direction of movement will be
Since the excavated soil is deposited on the front side in the direction of movement, and the entire trench excavating machine A is buried in the excavated soil, making it impossible to work, it is necessary to carry this excavated soil to the side of trench excavating machine A. Make it. The earth removal means for excavating soil usually uses an earth removal auger B, which has a spiral blade 31 wound around an auger shaft 30, with its auger shaft 30 perpendicular to the direction of movement of the trench excavator A. In this state, the starting end side in the transport direction faces the vicinity of trench excavator A, and the terminal end side in the transport direction is located on the side of trench excavator A. It is supported on the machine frame of machine A, and the excavation tooth b of trench excavator A is removed by this earth removal auger B.
The excavated soil is discharged to the side of trench excavator A.

In this method, the rotation of the auger shaft 30 causes the helical blades 31 to transport excavated soil along the ground surface GL in the direction shown by the arrow in FIG. A pile of excavated soil Y is placed on the end side of the conveyance direction of the auger B, which has come off.
As a result, predetermined grooves W can be excavated and formed during the cultivation rows of rhizomes M, but the soil removal auger B does not cut into the trench. The intermittent vibrations generated by the reaction force of the operation of dredging out the excavated soil along the ground surface GL are transmitted to the trench excavator A, and the excavation teeth b of the trench excavator A... There is a problem in that excessive contact with the left and right walls causes the walls to collapse, thereby cutting and damaging the rhizomes M that fall into the trench W together with the soil.

In addition, if the soil removal auger B is installed in a series so as to discharge the excavated soil only on one side of the left and right side of the trench excavator A, the reaction force when dredging out the excavated soil will cause the trench excavator to A is pushed out to one side of the left and right, and the direction of movement of the trencher A is meandering, so that the digging tooth b of the trencher A is pushed out.
There is a problem in that the grooves W excavated and formed by ... interfere with the cultivation rows of the rhizomes M, causing a situation where the rhizomes M are cut.

The present invention has been made in order to solve these problems occurring in the conventional means, and it is possible to avoid transmitting unnecessary vibrations to the trenching machine, and to move the trenching machine A to the side in the direction of travel. The purpose of the present invention is to provide a new means for carrying out the excavated soil dug up by the excavation teeth b of trench excavator A to the side of trench excavator A without pushing the excavated soil toward the side of trench excavator A. .

In order to solve the above-mentioned problems, the present invention has conducted various researches and found that the intermittent large vibrations that occur when the earth removal auger B transports excavated soil cause vibrations around the auger shaft 30. The excavated soil that is being transported along the ground surface GL by the spiral blades 31 is pushed into the pile Y of excavated soil that has already been carried out and accumulated in the shape of a pile pile by the terminal end of the spiral blade 31. When the excavated soil is removed, the entire pile Y of excavated soil is pushed out to the side, and this extrusion effect is achieved by rotating the side of the helical blade 31 that has carried the soil that comes into contact with the ground surface GL upwards. disappears, this extrusion action causes the spiral blade 3
This is due to the fact that it occurs in a pulsating manner corresponding to the pitch of No. 1, and that the reaction force of the soil removal action by the soil removal auger B, which changes the direction of movement of the trench excavator A, is mainly due to the reaction force of the soil removal action by the soil removal auger It was found that this is due to the end portion of B pushing out the entire pile Y of excavated soil. From this, from the starting end side to the ending side in the conveyance direction, the ground surface
Using an earth removal auger that is tilted so that it gradually rises against the GL, the excavated soil that is dug up to the surface by the digging teeth of the trench excavator is carried away diagonally upward to the side of the trench excavator. As a result, the reaction force caused by the terminal side of the earth removal auger being carried by the earth removal auger and pushing against the pile of excavated soil that is piled up is eliminated, and the large vibrations that occur intermittently are eliminated. It was completed by obtaining the following results.

Therefore, in the present invention, as a means to achieve the above-mentioned problem, the excavated soil dug up by the endlessly rotating digging teeth of the trench excavator is transported to the vicinity of the trench excavator. A trench excavator characterized in that the soil is carried diagonally upward on the side in the direction of movement of the trench excavator by means of a discharging auger whose starting end side faces the direction and which gradually rises from the ground surface toward the terminal end side in the conveying direction. In addition, as a device for carrying out this soil removal method, the starting end in the conveying direction is facing near the trench excavator, and the terminal end in the conveying direction is facing the side of the trench excavating machine. A trench excavator characterized in that, in the soil removal auger of a trench excavator, which is also supported on the machine frame, the auger shaft is supported on the machine body in a position that gradually floats upward from the ground surface toward the terminal end side in the conveying direction. This is to raise the soil removal auger in the machine.

Next, embodiments will be described in detail with reference to the drawings. It should be noted that the same reference numerals in the drawings as in the previous means will be used for constituent members having the same effect.

FIG. 2 is a rear view of the trench excavator used in carrying out the method of the present invention in a working state. In the same figure, T is a tractor, A is a trench excavator mounted on the rear side of the tractor T, is the earth removal auger supported on the machine frame of trench excavator A, M is rhizomes cultivated in the field, W is the trench excavated and shaped by the earlier trench excavator A, and Y is the trench dug by A after trenching. This figure shows a pile of excavated soil that was carried out by earth removal auger B and deposited on the ground surface GL.

Tractor T is a normal four-wheeled riding tractor, and the rear part of its body has the following parts as shown in Figure 3.
It is equipped with a top link 10, a lower link 11, a lift arm 12, and a PTO shaft 13.

The trench excavator A is mounted on a gear box 20 which also serves as a mounting machine frame. A drive shaft 21 that rotates through a transmission mechanism (not shown) is horizontally supported, and a drive sprocket 22 is attached to the drive shaft 21 so as to rotate together with the drive shaft 21. A boom 23 is loosely supported so that the upper end thereof can freely rotate back and forth, and a driven sprocket 24 is pivotally supported at the lower end of the boom 23. Chain a equipped with teeth b... is passed around endlessly, and the chain a is
is tensioned by an intermediate wheel 25 that is pivotally supported by a support arm protruding from the middle part of the boom 23, and the chain a is rotated endlessly by the drive of the drive sprocket 22, and the chain a is planted on the circumferential surface of the chain a. This is a normal endless chain type trench excavator that excavates a groove W using the excavating teeth b.

The trench excavator A has a gearbox 20, which also serves as a mounting frame, connected to a three-point hitch consisting of the above-mentioned top link 10, lower link 11, and lift arm 12, which are provided at the rear of the body of the tractor T. By being connected to and mounted on the tractor T, it is mounted on the tractor T so that it can be freely raised and lowered by the operation of the lift arm 12. Further, the gear box 20
The input shaft 26 protruding from the
The drive sprocket 22 is driven from the tractor T side by conducting the same. In addition, although not shown in the drawing, the boom 23 described above includes:
An arm protrudes, and when the arm is rotated back and forth by an operator sitting in the driver's seat of the tractor T via a linkage mechanism (not shown), the boom 23 is connected to the drive sprocket 2 described above.
The drive shaft 21 tilts and rotates back and forth around the drive shaft 21 of No. 2.

The earth removal auger B is a conventional one with a spiral blade 31 wound around an auger shaft 30, and the starting end side of the auger shaft 30 in the conveyance direction is connected to the middle of the chain a of the trench excavator A described above. Among the supporting intermediate wheels 25..., on the shaft 25a of the intermediate wheel 25' located slightly above the ground surface GL on the front side in the direction of movement when the trench excavator A is operated underground,
As shown in FIG. 4, a bearing support member 33, which is connected via a universal joint 32 and pivotally supports the terminal end of the auger shaft 30 in the conveyance direction, is connected to the trench excavator via a connecting plate 34. By connecting and supporting the projecting end of the stay 35, which is fixedly installed so as to project sideways from the boom 23 of machine A, with mounting bolts 36, the aforementioned intermediate wheel 25' becomes a driving wheel, and the auger is driving the shaft 30, and
As shown in FIG. 4, the auger shaft 30 is supported on the machine frame of the trench excavator A in such a manner that it gradually floats upward from the ground surface GL from the start end to the end end.

In FIG. 3, 37... are bolt holes provided at the protruding end of the stay 35 so that the aforementioned mounting bolts 36... can be inserted therethrough, and they are provided in series in the vertical direction. When installing and setting with 36..., these bolt holes 37...
By selecting the bolt hole 37 through which the mounting bolt 36 is inserted, the upward inclination angle α of the auger shaft 30 toward the terminal end in the conveying direction can be adjusted as desired.

As shown in FIG. 5, this earth removal auger B has a drive shaft 40 that is driven and rotated in communication with a transmission mechanism in a gearbox 20, disposed in front of a chain a provided with excavation teeth b. The starting end of the auger shaft 30 is connected to the transmission connection, and its drive is transmitted to the intermediate wheel 25'.
In some cases, it may be done directly without using . In this case, the stay 35 that supports the terminal end side of the auger shaft 30 in the conveyance direction is installed so as to protrude from the gear box 20.

Next, FIG. 6 shows a modification of the embodiment shown in FIG.
1 is also attached to the circumferential surface of the universal joint 32 that conductively connects the starting end side of the auger shaft 30 in the conveying direction to the shaft 25a of the intermediate wheel 25', which is the drive shaft, so that soil removal can be performed up to the part of the universal joint 32. I am trying to do this. The rest of the structure of this embodiment is the same as that of the embodiment shown in FIG. 4 described above, so the same constituent members are given the same reference numerals and detailed explanations will be omitted.

Next, FIG. 7 shows another embodiment. In this embodiment, the starting end side of the auger shaft 30 in the conveying direction and the shaft 25a of the intermediate wheel 25' (a separately provided drive shaft 4
The bearing 2 of the shaft 25a is placed around the universal joint 32 that conductively connects the
Case 50 integrated with a bearing support member that supports 5b
By supporting the starting end of the auger shaft 30 in the case 50 via a bearing 51, the auger shaft 30 is supported in an inclined position in which it gradually rises above the ground surface GL toward the terminal end in the conveyance direction. This is an example of how to do this. Therefore, in this embodiment, the upward inclination angle α of the auger shaft 30 is fixed, and the bearing support member 33 that pivotally supports the terminal end side of the auger shaft 30 in the conveyance direction and the stay 35 that supports it are omitted. There is. The rest of the structure of this embodiment is the same as that of the embodiment shown in FIG. 4 described above, so the same reference numerals are given to the constituent members having the same effect, and detailed explanation thereof will be omitted.

Next, FIG. 8 shows a modification of the embodiment shown in FIG. 7. In this embodiment, the auger shaft 3
0 and the shaft 25a of the intermediate wheel 25' (including the case of another drive shaft 40), a universal joint 32 is connected to the flexible shaft 32'.
The only difference from the embodiment shown in FIG. 7 is that the rest of the configuration is the same.
The same constituent members are given the same reference numerals and detailed explanations will be omitted.

Although not shown in the drawings, the transmission connection between the drive shaft 40 or the shaft 25a of the intermediate wheel 25' and the starting end side of the auger shaft 30 is achieved by forming the aforementioned case 50 into a gear case and using the bevel gear housed therein. In some cases, it may be necessary to do it by hand. Moreover, in FIG. 3, c is a trench dredge for dredging the bottom of the trench W to be excavated and formed.

The embodiment device constructed in this manner operates as follows.

The earth removal auger B is used as shown on the left side in Fig. 9 when the excavation tooth b of the trench excavator A carries out the excavated soil dug up to the ground surface GL by the rotation of the chain a. By carrying out the excavated soil diagonally upward to the side, the excavated soil will be deposited on a mountain Y with a gentle slope that follows the inclination angle α of the earth removal auger B. The excavated soil that is being carried out one after another is carried out along the gentle slope of the mountain Y, and is discharged from the end of the spiral blade 31 of the earth removal auger B to the upper surface of the highest point of the mountain Y. . For this reason, as shown on the right side of FIG.
When the helical blades 31 carry out the excavated soil sequentially along the ground surface GL, the excavated soil to be carried out is pushed into the pile Y of excavated soil that has already been carried out and piled up, so that the entire pile Y The large pulsating vibrations that were caused by pushing out are eliminated,
Excavated soil can now be transported with almost no vibration.

As explained above, in the means of the present invention, the excavated soil dug up by the endlessly rotating excavation teeth of the trench excavator is transported so that the starting end side in the conveying direction faces the vicinity of the trench excavating machine, and Conventionally, the earth removal auger lifts the excavated soil from the ground surface toward the end and carries it diagonally upward to the side in the direction of movement of the trench excavator. Intermittent large vibrations that had been caused by transporting the earth, and the large reaction force of the soil removal action acting perpendicularly to the direction of movement of the trench excavator, have disappeared, causing vibrations on the walls of the trench being excavated and formed. Work can now be carried out without causing collapse or meandering of the groove. Further, in order to prevent meandering due to the reaction force, the larger vibrations that would otherwise occur when a pair of earth removal augers are provided symmetrically laterally can be effectively eliminated.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the conventional means, Fig. 2 is a rear view of the device used to carry out the method of the present invention, Fig. 3 is a side view of the main parts of the same device, and Fig. 4 is the rear view of the same soil removal auger. Figure 5 is a side view of the main parts of another embodiment of the device, Figure 6 is a rear view of another embodiment of the earth removal auger, and Figure 7 is a partially broken view of another embodiment of the earth removal auger. FIG. 8 is a partially cutaway rear view of still another embodiment of the earth removal auger, and FIG. 9 is an explanatory view of the operation. Explanation of drawing symbols: A...Ditch digging machine, B...Earth removal auger, M...Rhizomes, T...Tractor, W...
Ditch, Y...Mountain of excavated soil, GL...Ground surface, a...
Chain, b...Drilling tooth, c...Ditch dredger, 10...
Top link, 11...Lower link, 12...
Lift arm, 13...PTO axis, 14...Universal joint shaft, 20...Gearbox,
21... Drive shaft, 22... Drive sprocket, 2
3... Boom, 24... Driven sprocket, 2
5, 25'... Intermediate wheel, 25a... Shaft, 25b...
... bearing, 26 ... input shaft, 30 ... auger shaft,
31... Helical wing, 32... Universal joint, 32'... Flexible shaft, 33...
Bearing support member, 34... Connection plate, 35... Stay, 36... Mounting bolt, 37... Bolt hole, 4
0... Drive shaft, 50... Case, 51... Bearing.

Claims (1)

[Scope of Claims] 1. Excavated soil dug up by the endlessly rotating excavation teeth of a trench excavator is transported so that the starting end in the conveying direction faces the vicinity of the trench excavating machine and the end side in the conveying direction faces toward the excavated soil. A soil removal method for a trench excavator, characterized in that the soil is carried away diagonally upward to the side in the direction of movement of the trench excavator by means of a soil removal auger that gradually rises from the ground surface. 2 Place the starting end in the transport direction near the trench excavator,
In the soil removal auger of a trench excavator, which is supported on the machine frame with the end side in the conveyance direction facing the side of the trench excavator, the auger shaft gradually rises upward from the ground surface toward the end side in the conveyance direction. An earth removal auger for a trench excavator characterized by being supported on the machine frame.