JPH04179789A - Earth auger device - Google Patents

Abstract

PURPOSE:To prevent earth adhered to an auger from scattering by providing telescopic coated pipe bodies between an earth-moving port provided to a thrust device moving up and down along a leader and an earth auger driving device. CONSTITUTION:Telescopic coated pipes 12a, 12b and 12c capable of expansion are provided between the upper part of an earth-moving port 7 provided to a thrust device 4 moving up and down along a leader 2 and a driving device 8 to rotate an earth auger 11. Coated pipe bodies 12a-12d are expanded with the expansion of a hydraulic cylinder 10, and the earth auger 11 is always coated with the coated pipe bodies 12a-12d. According to the constitution, earth not removed from the earth-moving port 7 can be prevented from scattering.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a drive device for rotating an earth auger, and a propulsion device for pushing and pulling an earth auger and a casing pipe into which the earth auger is inserted. The present invention relates to an earth auger device that is installed so as to be able to be moved up and down along a leader provided on the front side of a machine body, and in which a drive device and a propulsion device are connected to each other by a hydraulic cylinder.

[Prior Art] Next, a conventional earth auger device of this type will be explained with reference to FIGS. 5 to 7.

A leader 2, which is a support column, is attached to the front part of the pile driving machine body 1, which is equipped with a running body, with a pin, and the leader 2 is installed between the excavator body and the upper part of the leader 2. It is supported vertically by a bank or chi 3. reader 2
A thrust device 4 is attached to a guide rail 2a on the front surface of the vehicle so as to be able to slide up and down, and a sprocket wheel 5 is attached to the thrust device 4. The sprocket wheel 5 is engaged with a chain 6 stretched over the front side of the sprocket wheel 5 if'/-da 2. An earth removal lower is provided at the front of the thrust device 4.

A drive device 8 for rotating the earth auger 10 is installed above the thrust device 4, and a gripping member 8a of the drive device 8
grips a guide rail 4a attached to the thrust device 4. The thrust device 4 and the drive device 8 are connected to each other by a hydraulic cylinder 9. A casing vibe 11 that guides the discharge of earth and sand excavated by the earth auger 10 is connected to the thrust device 4 by a port, and the earth auger 10
is inserted into the casing vibe 11.

The sprocket wheel 5 of the thrust device 4 is rotated by a motor to generate thrust for pushing in or pulling out the earth auger 108 and the cage jig vibe 11. Further, by expanding and contracting the hydraulic cylinder 9, the drive device 8 of the earth auger 10 can be moved together with the earth auger 10 in the axial direction of the leader 2 independently of the thrust device 4.

In such a suorger device, the driving device 8 and the thrust device 4 move independently due to the operation of the hydraulic cylinder 9, so that the casing vibration caused by gravel or the like that has gotten between the earth auger 10 and the casing vibration 11 is removed. It is possible to easily eliminate dirt and sand clogging in the earth auger 11, and to improve workability by arbitrarily adjusting the preliminary excavation by the earth auger 10 depending on the soil quality.

[Problems to be Solved by the Invention] Earth and sand E excavated by the earth auger 10 rises through the casing vibe 11 and is discharged from the earth discharge lower. However, with clay soil, during excavation work, the soil sticks to the earth auger 10 and is not discharged from the earth removal lower, but is discharged from between the thrust device 4 and the drive device 8, and gets stuck around the pile driver. be scattered. This contaminates the surrounding environment and adheres to various parts of the pile driver, causing dirt and malfunction.

This invention has been made in view of the above, and an object of the present invention is to provide an earth auger device that can easily prevent excavated soil from being scattered around from between a thrust device and a drive device, regardless of the position of the drive device. With the goal.

1. Means for Solving the Problem] In order to achieve the above object, the present invention provides a telescopic combination of a plurality of sheathing tube bodies having different diameters that surround the earth auger and are installed between the drive device and the thrust device. ,
The innermost cladding tube body is fixed to the driving device, and the outermost cladding tube body is fixed to the thrust device.

[Function] When the hydraulic cylinder expands and contracts, a plurality of cladding tube bodies expand and contract accordingly, and the earth auger section between the drive device and the thrust device is always covered by the cladding tube bodies, preventing excavated soil from scattering. Ru.

C Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In these figures, the same members as in FIGS. 5 to 7 are designated by the same symbols.

An earth auger 10 is provided between the drive device 8 and the thrust device 4.
A plurality of cladding bodies 12 with different diameters, for example, four cladding bodies 12 surrounding the
a, 12b, 12c, and 12d are attached in combination in a telescopic shape. Covered! The number of stages of the J tube body is determined by the stroke of the hydraulic cylinder 9. Each coated tube body 12a,
12b, 12c, and 12d have a U-shaped cross section, the innermost cladding tube 12a is fixed to the lower end surface of the drive device 8 by a port 13, and the outermost cladding tube 12d
is fixed to the thrust device 4 by a port 13. On the upper end surface of each cladding tube body 12b, 12c, 12d other than the innermost circumferential side, a hook is attached to a half-split Eff-shaped plate 14a, 1.
4b and 14c are attached by ports 13.

3 and 4 show a state in which the distance between the drive device 8 and the thrust device 4 is minimized due to the shortening of the hydraulic cylinder 9, and each cladding body 12a, 12b, 12c, 12d is in the fourth position. As shown in the figure, they overlap in the diameter direction and have the minimum length in the axial direction of the leader 2. In this state, even if earth and sand E rises due to the rotation of the earth auger 10, the earth auger section between the thrust device 4 and the drive device 8 will be damaged by the sheathing tube bodies 12a to 12d and the half-split annular plates 14a, 14b.
, 14c, all the earth and sand E can be discharged from the earth discharge lower.

When the hydraulic cylinder 9 is extended to improve the discharge of gravel and the like within the casing vibrator 11, the distance between the thrust device 4 and the drive device 8 becomes larger. Then, since the cladding body 12a is fixed to the drive device with the bolts 13, the drive device 8
The annular edge of the cladding tube body 12a hits the half-split annular plate 14a and the cladding tube body 1.
2b by bolts 13, the cladding body 12b also rises. In this manner, each of the cladding tube bodies 12a to 12d rises while experiencing the earthing force 10 as the driving device 8 rises. Then, it becomes the most extended state shown in FIGS. 1 and 2. Even in this state, the earth auger section between the drive device 8 and the thrust device 4 is sealed by the cladding tube bodies 12a to 12d and the main crack annular plates 14a to 14c.
All of the earth and sand E comes out from the soil removal lower (.

[Effect of the invention] According to the invention described above, the following effects can be obtained.

1 Regardless of the upward position of the earth auger drive device, the covering body consisting of the sheath tube body and the half-split annular plate seals the earth auger part between the drive device and the propulsion device to the palm of the hand, preventing the scattering of earth and sand. can. Moreover, since the sheathing body is constituted by the sheathing tube body in a telescopic shape, the length can be shortened by overlapping each other, and no extra space is taken up.

2. Even if excavated soil accumulates in the extended state of each sheathing tube body, by shortening the hydraulic cylinder, each sheathing tube body can be brought into a shortened state and the earth and sand can be removed.

3 The cross-sectional shape of each cladding body is U-shaped, so
It is possible to prevent earth and sand from entering the gaps between the cladding pipe bodies.

4. The sheathing body consists of a plurality of sheathing bodies, half-split annular plates, and bolts, and the structure is simple, and the innermost sheathing body is attached to the drive device, and the other half-cladding bodies are attached to the drive device. Assembly is easy because the split annular plate is attached with bolts.

5. In the shortened state where each cladding body overlaps each other, even if excavated soil comes up under high pressure, the upper annular edge of each cladding body overlaps on the stairs and is connected to the drive device, so the drive device can It acts as a stopper and prevents the entire cladding tube body from moving upward 66. Since the cladding body is composed of the cladding tube bodies, it can withstand the pressure of earth and sand.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention.
The figure is a side view showing the hydraulic cylinder in its extended state, Fig. 2 is an enlarged sectional side view of the covering in that state, Fig. 3 is a side view showing the hydraulic cylinder in its retracted state, and Fig. 4 is its side view. 5 to 7 show a conventional earth auger device, FIG. 5 is a side view of the entire device, and FIG. 6 is a side view showing the state of the hydraulic cylinder when it is retracted. 7 are side views showing the state of the hydraulic cylinder when it is extended. 2. Leader, 4. Thrust device, 7. Soil discharge port,
8... Drive device, 9... Hydraulic cylinder, 10...
Earth auger, 11...Casing pipe, 12a,
12b, 12c, 12d - cladding tube body, 13... bolt, 14a, 14b, L4c... patent attorney representing half-split annular plate Tomi 1) 1st man Q, '1': izukoichi 2nd Figure 3 Figure mouth Figure 4 Figure 5 Figure 6 Figure mouth Figure 7

Claims (1)

[Claims] 1. An earth auger for excavating earth and sand, a drive device connected to the earth auger and rotating the earth auger, a casing pipe for earth removal into which the earth auger is inserted, and a casing pipe for discharging earth into which the earth auger is inserted; Equipped with an earth auger and a thrust device that pushes and pulls the casing pipe,
The drive device is installed separately above the thrust device, and the drive device and thrust device are connected to each other via a hydraulic cylinder installed parallel to the axis of the leader, and the drive device is connected to the leader together with the earth auger by the expansion and contraction of the hydraulic cylinder. In an earth auger device that can be moved independently of the thrust device in the axial direction of the
Multiple cladding bodies with different diameters surrounding the earth auger were installed in a telescopic configuration, the innermost cladding body was fixed to the drive device, and the outermost cladding body was fixed to the thrust device. An earth auger device characterized by: 2. The earth auger device according to claim 1, wherein the cladding tube has a U-shaped cross section, and an anti-cracking annular plate is attached with bolts to the upper end surface of each cladding tube other than the innermost circumferential side.