JP2896416B2 - Excavated earth compacted auger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compacted auger for excavating a pile hole as a foundation work in the fields of construction and civil engineering.

[0002]

2. Description of the Related Art If not all of excavated earth and sand is discharged to the ground, but part or most of the excavated soil is compacted in a hole wall, not only the trouble of earth and sand discharge can be saved, but also collapse of the hole wall can be prevented. In addition, since the friction resistance during excavation is reduced, it is possible to excavate at a large depth, and even if there is a boulder or boulder in the ground, continuous excavation while consciously adjusting the surface pressure of the cutting edge required for excavation as needed. Becomes possible.

As an earth auger capable of compacting such excavated earth and sand, there is known an earth auger in which a compacting blade 2 formed of a curved vertical plate is formed outside a screw blade 1 as shown in FIG. (Japanese Patent Publication No. 59-38394)

[0006] However, in the excavated earth compacted auger screw shown in FIG. 16, the excavation of the excavated soil by the screw blade 1 is interrupted in the portion where the compacting blade 2 is provided.

Therefore, the present inventors have developed an excavated sediment compaction type auger screw which can effectively solidify a hole wall while excavating without hindering the earth-lifting action as shown in FIGS. The present invention was filed as Japanese Patent Application No. 6-99436 (Japanese Patent Application Laid-Open No. 7-305587).

In the figure, reference numeral 3 denotes a rod of an auger screw. The rod 3 is provided with a screw blade 1 continuously as in the conventional auger screw. Between the pitches, a steel iron part 5 having a curved pressing surface 4 as a side surface, which starts from the peripheral surface of the rod 3 and bends so as to protrude outward to the outer edge position of the screw blade 1, is attached to the rod 3 of the auger screw. Provided on the outer periphery.

The iron part 5 is swung up like a thick-walled screw and raised, and the surface opposite to the curved pressing surface 4 is a vertical plane 6.

The earth and sand cut by the bit of the auger head (not shown) at the tip is transported upward by the lifting action of the turning of the screw blade 1, and the curved pressing surface 4 of the iron part 5 is transferred at this time. At the outside and is compacted to the hole wall.

The root of the iron 5 is on the outer periphery of the rod 3, but the screw blade 1 at the root of the iron 5 is notched in a round (R) shape. Thereby, the gap 7 can be formed.

In this embodiment, surplus earth and sand falls downward from the gap 7 and this earth and sand is removed by the screw blade 1.
Is transported to the ironing section 5 again.

[0011]

However, FIG. 14 and FIG.
In the iron part 5 shown in FIG. 15, the surface opposite to the curved pressing surface 4 is a vertical plane 6 on the assumption that the rod 3 is rotated in only one direction, that is, only the normal rotation. In the case of pulling out by reverse rotation, the iron part 5 becomes an obstacle, and reverse rotation itself becomes impossible.

An object of the present invention is to solve the inconvenience of the prior art and to effectively solidify the hole wall while excavating without obstructing the earth-lifting action, and to rotate the rod forward and backward. It is an object of the present invention to provide an excavated sediment compaction auger capable of obtaining the effect of consolidating excavated sediment by the iron part in both forward and reverse rotations.

[0013]

In order to achieve the above object, the present invention firstly provides a structure in which an auger rod, which is a small-diameter rod, is provided on the outer periphery of the auger screw from the outer periphery of the rod to the outer edge of the screw blade. In an excavated earth-sand compaction type auger provided with a thick flange-shaped iron part having a curved pressing surface protruding to the side surface so as to spirally rise, an auger rod is capable of normal and reverse rotation, and the iron part is an auger. The projecting side surfaces at both right and left ends from the outer periphery of the rod are always arc-shaped, and this arc shape is the same shape on the left and right. Thirdly, the irons are interchangeably connected by bolts, pins, and welds. Third, the ends of the irons are close to each other or overlap, and the overlap in the height direction does not exceed the height of the irons. Fourth, the iron parts arranged in this manner are sequentially combined as a continuous body. Fourth, the iron parts are combined so as to be aligned with the screw blades, and the curved pressing surface on the side is stretched outward from the rod to the outer edge position of the screw blades. Fifthly, the iron part is provided with an upper inclined surface which is inclined upward toward the outer periphery of the auger rod, sixthly,
The gist of the iron part is to provide an upper inclined surface and a lower inclined surface inclined upward and downward toward the outer periphery of the auger rod.

[0014]

According to the first aspect of the present invention, the earth and sand cut by the bit of the auger head at the tip is transferred upward by the lifting operation of the iron part itself or the iron part and the screw blade by turning the rod. At the time of this transfer, it is pushed outward by an iron part having a curved pressing surface projecting outward from the rod as a side surface, and is compacted to the hole wall.

Since the side surfaces of the iron portion protruding from the outer periphery of the auger rods at the right and left ends are always formed in an arc shape, there are no steps or flat surfaces. In addition to this, the arc shape is the same in the left and right. The hole wall compaction action of the earth and sand can be performed in response to both forward and reverse rotation of the auger rod, and there is no obstacle to the reverse rotation of the auger rod.

According to the second aspect of the present invention, in addition to the above-described operation, only the tip of the outer peripheral portion of the iron portion, which is particularly easily worn, can be replaced, so that economical repair can be obtained.

According to the third aspect of the present invention, the iron portions provided so as to rise spirally are sequentially combined as a continuous body, so that excavated earth and sand can be lifted by the iron portion even without screw blades. Can be transferred upward.

According to the fourth aspect of the present invention, the ironing portion can be effectively transferred upward by the lifting action without the need to continuously provide the ironing portions by being combined with the screw blades. The hole-pressing action of the earth and sand can be performed on the curved pressing surface on the side surface of the iron part.

According to the fifth aspect of the present invention, by providing the upper inclined surface, the soil and the like do not remain at the upper portion of the ironing portion, and the consolidation to the outer periphery is efficient, and the soil can be approximated to a completely non-discharged soil. Can be.

According to the sixth aspect of the present invention, in addition to the operation of the fifth aspect of the present invention, the iron part is provided with a lower inclined surface not only above but also below, so that the earth and the like can be vertically moved. , And the consolidation to the outer periphery can be made more efficient, and the earth can be completely eliminated.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a first example of an excavated earth compacted auger of the present invention.
FIG. 2 is a partial cross-sectional plan view showing the embodiment, and FIG. 2 is a cross-sectional plan view showing the same embodiment.

In the drawing, reference numeral 3 denotes an auger rod, which can be rotated forward and backward. This rod 3
A thick flange-shaped iron part 5 having a curved pressing surface 4 protruding outward on the outer periphery thereof is provided in such a manner as to spirally rise, but the iron part 5 is an auger rod. The projecting side surfaces of the left and right ends from the outer periphery of the outer ring 3 are always arc-shaped. This arc shape is the same on the left and right as shown in the figure.

In the illustrated example, the ironing portion 5 is formed such that the curved pressing surface 4 has an arcuate shape as a whole. In the figure, reference numeral 11 denotes a hole wall. The iron 5 may be of a hollow drum type.

By doing so, the earth and sand cut by the bit of the auger head (not shown) at the tip is transported upward by the lifting action by the turning of the iron part 5 accompanying the forward rotation of the rod 3, At the time of this transfer, it is pushed outward by the curved pressing surface 4 of the iron part 5 and is compacted by the hole wall 11.

When the rod 3 is rotated in the reverse direction, the iron part 5 performs the lowering action of the earth and sand. Even in this case, the iron part 5 is pushed outward by the curved pressing surface 4 of the iron part 5 during transfer. By appropriately combining such forward rotation and reverse rotation, the consolidation to the hole wall 11 is effectively performed, and the amount of earth discharging to the ground is reduced,
Or you can eliminate it.

FIG. 3 shows a second embodiment of the present invention.
The iron part 5 has a divided body 5a at the tip of the outer peripheral part.
It is assumed that it is exchangeably connected to b by a bolt 8, a pin, welding, or the like.

According to this embodiment, since the iron part 5 can replace only the divided body 5a at the tip of the outer peripheral part which is particularly easily worn,
The main body 5b can be economically repaired as it is.

FIGS. 4 and 5 show a third embodiment of the present invention.
The iron parts 5 arranged in this manner are sequentially combined as a continuous body. In this case, the overlap H in the height direction between the iron portions 5 is a distance from 0 to T which does not exceed the height T of the iron portion 5. This is appropriately selected depending on the ground.

According to the present embodiment, the iron parts 5 provided so as to rise in a spiral shape are sequentially combined as a continuous body, so that excavated earth and sand can be lifted upward by the lifting action of the iron parts 5 without the screw blades. It can be transported, and the hole wall of the earth and sand extruded outward by the curved pressing surface 4 of the iron portion 5
Consolidation to 11 is also obtained continuously.

FIGS. 6 to 9 show a fourth embodiment of the present invention, wherein the iron 5 is combined with the screw blade 1 provided on the rod 3 so that the curved pressing surface 4 on the side surface of the rod 3 The screw blade 1 was extended outward from the peripheral surface to the outer edge position of the screw blade 1.

In the example of FIG. 6, the iron part 5 is provided when the screw blade 1 turns one pitch.
FIG. 9 to FIG. 9 show a case where the ironing section 5 is provided with a turning of 1.5 to 2.0 pitches as an application example.

In any case, the earth and sand conveyed by the screw blade 1 is pressed against the wall of the excavation hole by the iron 5 to form a consolidation wall, but the iron 5 is swung up like a thick-walled screw and raised. Because it was made, iron part 5
Can be sent to the screw blade 1 further above.

The root of the iron 5 is on the outer periphery of the rod 3, but the screw blade 1 at the root of the iron 5 is notched in a round (R) shape. If the gap 7 is thus formed, excess earth and sand falls downward from the gap 7, and the earth and sand is transported to the ironing section 5 again by the screw blade 1.

FIGS. 10 and 11 show a fifth embodiment of the present invention. The iron part 5 is provided with an upper inclined surface 9 which is inclined upward at an angle θ toward the outer periphery of the auger rod 3. As a result, the iron part 5 becomes close to a half-piece of a truncated cone.

According to the fifth embodiment, the provision of the upper inclined surface 9 allows the earth and sand going on the ironing portion 5 to fall on the inclined surface, so that no soil remains on the ironing portion 5 and the soil is removed. Since it can be collected on the curved pressing surface 4 of the portion 5, the compaction to the hole wall becomes efficient, and it can be made closer to a completely non-discharged material.

FIGS. 12 and 13 show a sixth embodiment of the present invention, in which the iron part 5 is directed upward to the outer periphery of the rod 3 at an angle θ.
In addition to providing the upper inclined surface 9 inclined at a lower angle, the lower inclined surface 10 inclined at an angle θ toward the outer periphery of the rod 3 below.
Shall be provided. Thereby, the iron part 5 becomes close to a half-split body in the shape of a bobbin.

According to the sixth embodiment, the iron part 5 is provided with the lower inclined surface 10 in addition to the upper inclined surface 9, so that the soil or the like always moves up and down and remains on both the upper and lower parts of the iron part 5. Instead, more can be collected on the curved pressing surface 4 of the iron part 5, so that the consolidation to the hole wall becomes more efficient, and it is possible to completely remove the soil.

[0038]

As described above, the consolidation type auger for excavated earth and sand of the present invention can firstly solidify the hole wall while excavating without hindering the earth-lifting action. In addition, both forward rotation and reverse rotation of the rod are possible, and in either of the forward rotation and the reverse rotation, the compacting action of the excavated earth and sand by the iron part can be obtained.

Secondly, if only the tip of the outer peripheral portion of the iron portion, which is particularly easily worn, can be replaced, economical repair can be obtained. Third, the iron portion which is provided so as to rise in a spiral shape is continuous. By combining them sequentially as a body, excavated earth and sand can be transferred upward by the lifting action of this iron part without a screw blade. Fourth, the iron part is continuously provided by combining it with the screw blade The excavated earth and sand can be effectively transported upward by the lifting action without effect, and the hole-pressing action of the earth and sand can be performed on the curved pressing surface on the side surface of the iron part.

Fifth, by providing an upper inclined surface,
Soil etc. do not remain at the top of the iron part, consolidation to the outer periphery becomes efficient, and it can approach that of completely no soil removal.
The iron part has a lower inclined surface not only above but also below, so that the soil etc. always moves up and down and does not remain at the upper and lower parts of the iron part. It is something that can be.

[Brief description of the drawings]

FIG. 1 is a partial side view showing a first embodiment of an excavated earth compaction type auger of the present invention.

FIG. 2 is a cross-sectional plan view showing a first embodiment of an excavated earth compaction type auger of the present invention.

FIG. 3 is a cross-sectional plan view showing a second embodiment of an excavated earth and sand compaction type auger of the present invention.

FIG. 4 is a partial side view showing a third embodiment of the excavated earth compaction type auger of the present invention.

FIG. 5 is a cross-sectional plan view showing a third embodiment of the excavated earth compaction type auger of the present invention.

FIG. 6 is a partial side view showing a fourth embodiment of the excavated earth compaction type auger of the present invention.

FIG. 7 is a side view showing a modified example of the fourth embodiment of the excavated earth compaction type auger of the present invention.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

FIG. 9 is a sectional view taken along line BB of FIG. 7;

FIG. 10 is a partial side view showing a fifth embodiment of the excavated earth compaction type auger of the present invention.

FIG. 11 is a partial longitudinal side view showing a fifth embodiment of the excavated earth compaction type auger of the present invention.

FIG. 12 is a partial side view showing a sixth embodiment of the excavated earth compaction type auger of the present invention.

FIG. 13 is a partial vertical sectional side view showing a sixth embodiment of the excavated earth compaction type auger of the present invention.

FIG. 14 is a partial side view showing a conventional example.

FIG. 15 is a sectional view taken along the line CC of FIG. 14;

FIG. 16 is a side view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Screw blade 2 ... Consolidation blade 3 ... Rod 4 ... Curved pressing surface 5 ... Iron part 5a ... Split body 5b ... Body 6 ... Flat surface 7 ... Void portion 8 ... Bolt 9 ... Upper inclined surface 10 ... Lower inclined surface 11 ... Hole wall

Claims (6)

(57) [Claims] 1. A thick flange-shaped iron part having a curved pressing surface protruding outward from the outer periphery of the auger rod as a rod of the auger screw to the outer edge of the screw blade from the outer periphery of the rod to the outer periphery of the auger rod. In the excavated earth-and-sand compaction type auger provided to rise spirally, the auger rod is capable of normal and reverse rotation, and the iron part has an arcuate shape at the protruding side surfaces at both left and right ends from the outer periphery of the auger rod, An excavated earth and sand compacted auger characterized in that the arc shape is the same on the left and right. 2. The excavated earth compacting auger according to claim 1, wherein the iron part has a divided body at an outer peripheral end, and the divided body is exchangeably connected to the main body by bolts, pins and welding. 3. The iron part has ends that are close to each other or overlap each other,
The excavated earth-and-sand compacting auger according to claim 1 or 2, wherein the overlap in the height direction is a distance that does not exceed the height of the iron part, and the iron parts thus arranged are sequentially combined as a continuous body. 4. The excavated earth and sand according to any one of claims 1 to 3, wherein the iron part is combined with the screw blade, and the curved pressing surface on the side surface projects outward from the rod to the outer edge position of the screw blade. Consolidated auger. 5. The excavated earth-sand compacted auger according to claim 1, wherein the iron portion has an upper inclined surface inclined upward toward the outer periphery of the auger rod. 6. The excavated earth compacting auger according to claim 1, wherein the iron portion has an upper inclined surface and a lower inclined surface inclined upward and downward toward an outer periphery of the auger rod.