JPH0336588Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multiple auger that excavates vertical holes arranged in a row in the ground at once.

[Conventional technology]

As shown in Fig. 4, the conventional triple auger (multiple auger) has one hydraulic drive motor and one gear train.
9, 19, and 19 are connected, and each gear rotates one auger. However, due to the nature of the gear train consisting of three gears, the central auger 18 rotates to the left (counterclockwise). When digging, the left and right augers 16,
17 is a right-handed spiral type, and must be excavated by rotating to the right (clockwise).

[The problem that the idea aims to solve]

In the conventional example, the number of drive motors can be reduced to one, but during excavation, the central auger 18 and the left and right augers 1
Earth and sand are discharged point-symmetrically between points 6 and 17, 20 and 20, and the torsion moment due to the reaction force at this discharge position acts, twisting the entire auger and excavating three straight vertical holes. There were problems such as not being able to do so. The present invention was developed in view of this problem, and since the amount of torsion can be determined from the amount of excavation, the central stirring auger can be rotated in the forward and reverse directions, making it possible to cancel out the torsion in the clockwise direction and the torsion in the counterclockwise direction by equal amounts. To provide a multiple auger which can excavate three well-parallel ground holes and which can perform this operation easily and quickly by simply rotating the central stirring auger in the forward and reverse directions.

[Means to solve the problem]

The present invention, as illustrated in FIGS. 1 and 2,
A right-handed spiral auger 2 and a left-handed spiral auger 4 are provided on both sides of a central stirring auger 3 provided with a stirring protrusion 3a, and the right-handed spiral auger 2 and left-handed spiral auger 4 are driven in opposite directions by respective drive motors 5 and 7. This multiple auger is configured such that the central agitation auger 3 can be independently rotated in forward and reverse directions by a separate drive motor 6.

[Effect]

As shown in FIG. 3a, the right-handed spiral auger 2 and the left-handed spiral auger 4 are rotated clockwise 9 (counterclockwise) and counterclockwise 10 (clockwise), and the central stirring auger 3 is rotated forward 12 (clockwise). When the excavated earth and sand are excavated in a concentrated manner on one side between the central agitation auger 3 and the left-handed spiral auger 4, the earth and sand are discharged 14. A clockwise twisting force is exerted by the reaction force generated by this earth removal 14, and as the excavation progresses, the triple auger gradually twists clockwise. At this time, as shown in FIG. 3b, when the central stirring auger 3 is reversed 13, the excavated soil is concentrated on one side between the central stirring auger 3 and the right-handed spiral auger 2, and is discharged 15. Earth removal 1
A twisting force acts clockwise due to the reaction force caused by 5. At this time, if the triple auger is dug by the same amount as in the case of FIG. 3a, the triple auger will be twisted counterclockwise by the same amount as the clockwise twist, and the torsion of the triple auger will be corrected.

As is clear from the above, the right-handed spiral auger 2 and the left-handed spiral auger 4, which are provided on both sides of the central stirring auger 3, which can be rotated in forward and reverse directions, rotate in opposite directions. The amount of digging and twisting of the continuous auger are proportional. Therefore, the amount of torsion can be estimated by looking at the amount of excavation, so when torsion occurs, switch the rotation direction of the central stirring auger 3, make it dig by the same amount as the amount of excavation before switching, and create the same amount of opposite twist as before switching. can be used to correct the twist of the triple auger.

〔Example〕

An embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. Reference numeral 1 denotes a mounting body on which hydraulic drive motors 5, 6, and 7 that can be rotated in forward and reverse directions are mounted in parallel, and is moved up and down along a leader mast (not shown). 3 is a central stirring auger provided with a stirring protrusion 3a, which is connected to a central drive motor 6;
A right-handed helical auger 2 and a left-handed helical auger 4 provided on both sides are connected to drive motors 5 and 7, respectively. The drive motors 5 and 7 rotate the right-handed spiral auger 2 and the left-handed spiral auger 4 to the right (clockwise) 9 and to the left (counterclockwise) 10, respectively, during excavation through a common direction switching valve 8. That is, both augers 2 and 4 are rotated in opposite directions to enable digging.
and the drive motor 6 via another directional switching valve 11.
rotates forward and reverse, thereby causing the central stirring auger 3 to rotate forward (clockwise) 12 and reverse (clockwise) 13.

[Effect of idea]

In the present invention, a right-handed spiral auger 2 and a left-handed spiral auger 4 are provided on both sides of a central stirring auger 3 provided with a stirring protrusion 3a, and the right-handed spiral auger 2 and left-handed spiral auger 4 are driven by respective drive motors 5 and 7. Since the central agitation auger 3 can be independently rotated in the forward and reverse directions by a separate drive motor 6, the amount of excavation and the amount of twist of the triple auger are proportional, and the amount of excavation is Using this as a guideline, the central stirring auger is rotated forward and backward, and the clockwise and counterclockwise torsions of the triple auger are equalized and offset, making it possible to excavate three straight ground holes, while reducing the load. It is characterized by the ease of operation in which torsion can be corrected by simply rotating the small central stirring auger in the forward and reverse directions.

[Brief explanation of the drawing]

Figure 1 is a simplified front view of one embodiment of the present invention;
The figure is a circuit diagram of the same hydraulic drive motor part as above, Figures 3a and b are explanatory diagrams showing the effects of counterclockwise twisting and clockwise twisting of the triple auger of one embodiment, respectively, and Figure 4 is the conventional example of the triple auger. It is an explanatory view showing a twisting action of a continuous auger. In the figure, 2...Right-handed spiral auger, 3...Central stirring auger, 4...Left-handed spiral auger, 5, 6, 7
...Hydraulic drive motor.

Claims (1)

[Scope of utility model registration request] A right-handed spiral auger 2 and a left-handed spiral auger 4 are provided on both sides of a central stirring auger 3 provided with a stirring protrusion 3a.
and can be rotated in opposite directions by respective drive motors 5 and 7, and the central stirring auger 3 can be independently rotated in forward and reverse directions by another drive motor 6.