JPH11200749A - Earth removal device in foundation work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth removal device capable of contriving safety of working and improvement of a working environment by performing earth removal to the ground at a low position to the utmost. SOLUTION: A foundation work machine interlocks and connect a screw auger 7 on the lower part of an auger machine 4, and a pile 16 fitted to the screw auger 7 or a casing is attached. In the case, the pile 16 communicates with the lower part of the auger machine 4 or a hopper upper end communicates with the upper end of the casing, an earth removal hopper 13 extending along the outside part of the pile 16 or the casing in parallel and whose lower end is opened is provided, and soil and sand pushed out from the pile 16 or the upper end of the easing by the screw auger 7 is removed along the pile or the outside part of the easing by the earth removal hopper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine for foundation work in which a screw auger is interlockedly connected to a lower part of an auger machine which moves up and down along a leader, and a pile or a casing fitted with the screw auger is attached. For example, a pile driving machine for driving piles (PC piles or steel pipe piles) while performing a middle moat with a screw auger, or a steel sheet pile press-in machine for simultaneously pressing a steel sheet pile into a casing (steel pipe) while performing a middle moat with a screw auger. In particular, the present invention relates to an earth removal device in such a machine for foundation work.

[0002]

2. Description of the Related Art In a machine for foundation work as described above, in order to discharge earth and sand extruded above a pile or a casing by a screw auger to the ground, a lower portion of the auger machine and an upper end of a pile or a casing are used. An earth discharging cylinder is coaxially interposed between the cylinders, and an earth discharging port is provided on an outer peripheral portion of the cylindrical part to discharge the earth and sand from the earth discharging port. , The effective length of the pile or casing becomes shorter for the same leader length, a large-scale machine is required, and the dumping is performed by dropping from a high place. In addition, there is a problem that earth and sand are scattered around and adhere to nearby workers and buildings to deteriorate the working environment.

[0003] An object of the present invention is to provide an earth removal device capable of improving the safety of work and the work environment by allowing earth removal to be performed at a position as low as possible.

[0004]

According to a first aspect of the present invention, there is provided an earth removal device for a foundation work machine, wherein a screw auger is interlockedly connected to a lower portion of an auger machine and is fitted over the screw auger. In the machine for foundation work in which the pile 16 or the casing is mounted, the upper end of the hopper communicates with the upper end of the pile 16 or the casing at the lower part of the auger machine 4 and is parallel to the outer side of the pile 16 or the casing. A soil discharging hopper 13 extending to the bottom and opening at the lower end is provided, and the earth and sand extruded from the pile 16 or the upper end of the casing by the screw auger 7 is discharged by the soil discharging hopper 13 along the outside of the pile 16 or the casing. It is designed to be soiled.

[0005] A second aspect of the present invention is a soil discharging device for a foundation work machine according to the first aspect of the present invention.
A bellows portion or a telescopic tube portion 19 interposed between the upper hopper portion 14, the lower hopper portion 17, and the upper and lower hopper portions 14, 17 and capable of expansion and contraction adjustment by expansion and contraction adjusting means 18.
Consists of

According to a third aspect of the present invention, there is provided an earth removal device for a foundation work machine according to the first or second aspect,
3 is rotatable around the axis of the screw auger 7.

According to a fourth aspect of the present invention, there is provided the earth discharging apparatus according to any one of the first to third aspects, wherein the earth discharging port 22 at the lower end of the earth discharging hopper 13 is provided with a lid 2 which is opened and closed by opening and closing driving means 23.
4 are provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 exemplifying a pile driver, reference numeral 1 denotes a leader which is erected by a crawler crane K, and 2 denotes an elevating body which moves up and down along a guide rail 3 provided on the front surface of the leader 1. It is. Reference numeral 4 denotes an auger machine mounted on the elevating body 2. The drive shaft 5 of the auger machine 4
The lower bracket 6 of the elevating body 2 is rotatably supported by a lower bracket 6, and the lower end thereof has an upper end shaft 7 of a screw auger 7.
a (see FIG. 2) is detachably connected. This figure 1
As shown schematically in FIG. 1, the upper and lower ends of a rack or chain 8 arranged parallel to the guide rail 3 over the entire length of the front surface of the leader 1 are fixed to the leader 1, and a sprocket (or pinion gear) meshing with the rack or chain 8 is fixed. 9) and 10 are provided on the elevating body 2, and the elevating body 2 is driven up and down along the rack or the chain 8 by the rotation drive of the sprocket 9.
Incidentally, the sprocket 9 is driven by a rotation driving means (not shown).

A bracket 6 provided integrally with the lower part of the elevating body 2 supports a cylindrical support 11 which can rotate around the drive shaft 5 of the auger machine 4 independently of the drive shaft 5. 11 is provided with a rotation drive mechanism 12. The rotary drive mechanism 12 is supported by the elevating body 2 and is driven by a motor (not shown). The worm 12 a is meshed with the worm 12 a and provided on the outer periphery of the cylindrical support 11. And a wheel 12b. The lower end portion of the cylindrical support 11 is integrally connected with a discharging duct portion 14a which forms a part of a discharging device 13 to be described later. Pile mounting part 15
Is provided concentrically with the drive shaft 5 of the auger machine 4, and the pile mounting portion 15 is provided at the upper end of a pile 16 such as a steel pipe pile or a PC pile (precast concrete pile) to be inserted into the screw auger 7. Are fitted and attached.

Next, the soil discharging device will be described in detail with reference to FIGS. 1 to 3. In the soil discharging device, the upper end of the hopper communicates with the upper end of the pile 16, and extends along the outer portion of the pile 16. An earth discharging hopper 13 extending downward in parallel with this and having a lower end opened is provided, and the earth and sand pushed out from the upper end inside the pile 16 by the screw auger 7 is moved along the outer part of the pile 16 by the earth discharging hopper 13. The earth removal hopper 13 has an upper hopper section 14.
, The lower hopper section 17, the upper and lower hopper sections 14,
17 and a bellows portion 19 which is adjustable in expansion and contraction by expansion and contraction adjusting means 18, and the upper hopper portion 14 is integrally connected to the lower end of the cylindrical support 11. Duct part 14a and this duct part 1
4a, and is connected to the stake 16 from the duct portion 14a.
And an upper side hopper portion 14 formed of an outer duct portion 14b formed so as to project outward and open downward.

As can be seen from FIG. 2, the upper end of the bellows portion 19 is formed on the outer duct portion 14 forming the upper side hopper portion 14.
The lower end of the bellows portion 19 is integrally connected to the lower end opening of the lower hopper 17. As shown in FIG. 1, the expansion / contraction adjustment means 18 for adjusting the expansion / contraction of the bellows portion 19 includes an electric winch 20 provided on the cylindrical support body 11 and a winch 20 which winds the lower hopper 17. And a wire 21 to be suspended.
By raising and lowering the lower hopper portion 17 by feeding and winding operations, the bellows portion 19 can be expanded and contracted, and the length and the internal volume of the discharging hopper 13 can be freely adjusted. The wire 21 penetrates from the winch 20 through the outer duct portion 14b of the upper hopper portion 14 and hangs down along the central axis of the discharging hopper 13, and has its leading end connected to the lower hopper portion 17.

The lower hopper section 17 is provided with a discharge port 22 at a lower portion of the outer wall thereof. The discharge port 22 is opened and closed by a manual operation, a wire operation, or a fluid pressure cylinder 23 as opening and closing driving means. A driven lid 24 is pivotally mounted. As shown in FIG. 2, the cylinder 23 has a cylinder body 23a pivotally attached to the upper end of the lower hopper section 17, a tip end of a piston rod 23b pivotally attached to the free end of the lid 24, and The lid 23 is opened and closed by the expansion and contraction operation of 23b.

In the use of the earth removal device having the above-described configuration, the pile 16 is driven into the ground while the lifting body 2 is driven downward while the screw auger 7 is rotated by the auger machine 4. Auger 7
As shown in FIG. 2, the earth and sand excavated and pushed up inside the pile 16 are first introduced from the upper end of the pile 16 into the earth discharging duct 14 a of the upper hopper section 14, and from the duct 14 a to the outside. It is pushed out to the duct part 14b,
From the outer duct portion 14b, it falls to the lower hopper portion 17 via the bellows portion 19, and is discharged from the discharging port 22.

At the time of this discharging operation, the screw auger 7
Therefore, the bellows portion 19 of the discharging hopper 13 needs to be appropriately extended by the expansion and contraction adjusting means 18. That is, the bellows portion 19 is initially in a contracted state, and in this state, as the excavation progresses, the earth and sand is removed from the bellows portion 19 by the duct portions 14a and 14b.
And stay in the lower hopper 17. As the amount of sediment increases, the bellows portion 19 is extended by operating the expansion / contraction adjusting means 18 composed of the wire 21 and the like, so that the amount of sediment accumulated is increased. At the time of contact with the ground or at the time of reaching the contact surface, the opening / closing drive means 23 is operated to operate the lid 24.
To discharge the soil inside the hopper 13 from the discharge port 22. Thereafter, the expansion / contraction adjusting means 18 is operated again to contract the bellows portion 19 so as to separate the bellows portion 19 from above the ground so that the pile 16 and the screw auger 7 can excavate, that is, allow the bellows portion 19 to extend. Then, the bellows portion 19 is extended by operating the expansion / contraction adjusting means 18 in accordance with the amount of sediment remaining inside the bellows portion 19 as the excavation progresses, and the lower hopper portion 17 reaches the ground or close to the ground surface. At that point, the soil is removed. In any case, the discharging hopper 13 is mounted on the lower hopper 1.
7 is positioned as low as possible to the ground, and the earth and sand is discharged from the earth discharging port 22 so that the earth and sand are not scattered around, so that it is safe for nearby workers and buildings and the working environment is impaired. There is nothing.

Further, since the lower hopper portion 17 of the earth discharging hopper 13 is suspended and supported by the wire 21 of the expansion / contraction adjusting means 18, the lower hopper portion 17 can be freely moved to some extent. It may be located at a required position such as a bucket, and may be directly discharged to a dump truck.

The discharging hopper 13 is provided with an auger machine 4.
Since the cylindrical support 11 is attached to a cylindrical support 11 rotatable around the drive shaft 5 independently of the drive shaft 5, the unloading hopper 13 is moved to the position shown in FIG. As shown, it can be pivoted about the axis of the screw auger 7, thereby setting the unloading position to the pile 16.
Can be changed as appropriate along the periphery of. In this way, the discharging hopper 13 can be directed to a free position around the axis of the screw auger 7 (pile 16). The earth discharging hopper 13 can be rotated to discharge the earth, or it is convenient when the earth is discharged to a dump truck or a bucket as described above.

In the embodiment described above with reference to the drawings, the discharging hopper 13 is formed by dividing the upper hopper portion 14, the lower hopper portion 17, and the bellows portion 19 interposed between the upper and lower hopper portions 14, 17. However, instead of the bellows portion, it may be formed in a multistage cylindrical or nested tubular (nested bamboo shoot) telescopic tubular portion 19. Further, a structure may be employed in which the cover 24 is not provided at the discharge port 22 of the discharge hopper 13 and the discharge port 22 is kept open. Further, in this embodiment, the pile driver in which the pile 16 is attached to the lower part of the auger machine 4 has been described, but the earth discharging device according to the present invention is connected to the screw auger at the lower part of the auger machine, A steel pipe casing fixedly connected to a screw auger is fixedly connected, and it can be applied to foundation construction machines such as a steel sheet pile press-in machine that presses steel sheet piles while simultaneously penetrating the casing while performing middle moat with a screw auger. Is done. Further, the machine for foundation work to which the present invention is applied includes a machine in which a casing inserted into a screw auger is rotationally driven.

[0018]

According to the first aspect of the present invention, the upper end portion of the hopper communicates with the upper end portion of the pile or casing at the lower portion of the auger machine and extends in parallel along the outer portion of the pile or casing. The lower end is provided with an earth discharging hopper, and the earth and sand extruded from the upper end of the pile or casing by the screw auger is discharged by the earth discharging hopper along the outer side of the pile or casing. Discharge from the lower end of the hopper can be performed as low as possible, thereby improving work safety and working environment, and shortening the effective length of the pile or casing as in the conventional device. Can be avoided as much as possible.

According to a second aspect of the present invention, a bellows is disposed between the upper hopper, the lower hopper, and both hoppers, and the length of the bellows can be adjusted by expansion and contraction adjusting means. The hopper length and the internal volume can be adjusted according to the amount of soil removal and the progress of excavation with the screw auger, thereby improving the workability of the earth removal work. be able to.

According to a third aspect of the present invention, since the discharging hopper is pivotable about the axis of the screw auger, if there is an obstacle such as a building near the excavation position, it is avoided. The earth discharging hopper 13 can be rotated to the position to discharge the earth.

According to a fourth aspect of the present invention, a cover is provided at the lower end of the discharging hopper at the lower end of the discharging hopper so that the discharging can be performed when necessary according to the excavation condition. Can be.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view showing an entire machine for foundation work provided with an earth removal device according to the present invention.

FIG. 2 is a longitudinal sectional view showing an earth removal device in the same machine for foundation work.

FIG. 3 is a sectional view taken along line XX of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Leader 2 Elevating body 4 Auger machine 5 Auger machine drive shaft 7 Screw auger 11 Cylindrical support body 12 Rotation drive mechanism 13 Discharge hopper 14 Upper hopper part 14a Discharge duct part 14b Outer duct part 15 Pile mounting part 16 Pile 17 Lower side hopper part 18 Expansion / contraction adjustment means 19 Bellows or expansion / contraction cylinder part 22 Discharge port 23 Fluid pressure cylinder (opening / closing drive means) 24 Lid

Claims (4)

[Claims] 1. A machine for foundation work in which a screw auger is interlockedly connected to a lower part of an auger machine and a pile or a casing fitted to the screw auger is attached. The upper end of the hopper communicates with the upper end of the casing, and a soil discharging hopper is provided that extends parallel to the outside of the pile or casing and opens at the lower end, and the earth and sand pushed out from the upper end of the pile or casing by the screw auger. An earth discharging device configured to discharge earth along an outer portion of a pile or a casing by the earth discharging hopper. 2. A discharging hopper, comprising: an upper hopper portion;
Interposed between the lower hopper and the upper and lower hoppers,
The earth removal device in a machine for foundation work according to claim 1, comprising a bellows portion or a telescopic tubular portion that can be telescopically adjusted by telescopic adjustment means. 3. The earth removal device for a foundation construction machine according to claim 1, wherein the earth removal hopper is pivotable about an axis of the screw auger. 4. A discharging opening at the lower end of the discharging hopper is provided with a lid which is opened and closed by opening and closing driving means.
3. The discharging apparatus according to any one of 3.