JP2638723B2 - Vertical excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical excavator.

[0002]

2. Description of the Related Art Conventionally, when excavating a vertical hole, for a small diameter, after excavating a casing tube by a Venoto method, excavation is performed using a hammer grave.
Further, for a large diameter of, for example, 2000 mm or more, a reverse circulation method or the like is employed, and therefore, earth and sand are discharged using water.

[0003]

When excavating a large-diameter vertical hole, the reverse circulation method is used as described above. However, according to this method, the excavated soil is discharged using water. However, there is a problem that the water treatment facility is required and the facility becomes large-scale.

Therefore, an object of the present invention is to provide a vertical excavator capable of solving the above-mentioned problems.

[0005]

In order to solve the above-mentioned problems, a vertical excavator according to the present invention comprises a tubular body supported up and down via a tubular casing, and a slide device mounted on the tubular body. A slide member held externally so as to be vertically movable via
A cutter head held on the slide member via a swing bearing and swiveled by a swing device, wherein the cutter head has a cylindrical revolving body provided with an excavation bit on a lower end face thereof; A plurality of excavating arms radially protruding from the outer peripheral surface of the revolving body and having excavating bits provided on one side thereof, and furthermore, the mounting position of each of the excavating arms is set at the center of the cylindrical body. And a notch is formed in the revolving body for taking in the earth and sand excavated by the excavating arms into the inside thereof.

[0006]

[Function] When a vertical hole is excavated by the above vertical hole excavator,
A tubular body to which a cutter head is attached is suspended through a tubular casing in an initially formed introduction hole, and the cutter head is turned by a turning device, and the cutter head is gradually turned by a slide device. To excavate.

At this time, since the mounting position of the excavating arm is eccentric with respect to the center, the earth and sand excavated by the excavating arm naturally moves toward the center side of the revolving structure, and the surroundings thereof move around. It falls from the formed notch into the revolving superstructure.

The excavated earth and sand that has fallen into the revolving structure
It is discharged outside by a grab bucket suspended through the tubular body and the revolving body. Then, when the excavation is performed to a predetermined depth, after the slide device is contracted, a cylindrical casing is added to the upper end portion of the cylindrical body, and excavation is subsequently performed in the same procedure as described above.

As described above, by lowering the cylindrical body and the cutter head and successively adding the cylindrical casing, a standing hole having a predetermined depth can be excavated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIG. 1 to FIG. 4, reference numeral 1 denotes a vertical hole excavator for drilling a large diameter vertical hole, and a working crane 3 is disposed above the vertical hole 2 for drilling.

The vertical hole excavator 1 includes a tubular casing 11 which can be successively replenished, an elevating jack 12 for raising and lowering the tubular casing 11, and the tubular casing 1
1 is connected to a lower end of the cylindrical body 1 via a bolt or the like.
3, an annular slide member 15 which is externally slidably held on the cylindrical body 13 via a slide jack (slide device) 14 in a vertical direction, and the slide member 1
5, a cutter head 18 which is held at the lower end of the cylindrical body 13 via a swivel bearing 16 and is turned around a central axis of the cylindrical body 13 by a swivel device 17 around a vertical axis. 2 and a fixing device 19 for fixing to the inner wall surface.

The cutter head 18 has a cylindrical revolving body 22 having a drill bit 21 attached to a lower end surface thereof, and is provided at a plurality of locations on the outer peripheral surface of the revolving body 22 from, for example, four sides. And a plurality of excavating arms 24 each having a plurality of excavating bits 23 attached to its side.

The swivel bearing 16 for holding the cutter head 18 so as to be swivelable has an outer ring portion 16a formed of a connecting member 2a.
5 is connected to the excavating arm 24, and the inner ring portion 16 b is connected to the slide member 15.

The turning device 17 includes a motor 32 supported on the slide member 15 via a bracket 31 and a ring gear 34 attached to an output shaft of the motor 32 and formed on an outer ring portion 16a of the turning bearing 16. And a pinion 33 that meshes.

Accordingly, by driving the electric motor 32, the cutter head 18 is rotated about the vertical axis via the pinion 33 and the ring gear 34. Further, as shown in FIG. 4, the excavating arm 24 projecting from the outer peripheral surface of the revolving unit 22 is attached so that its mounting position is shifted from the center of the revolving unit 22.
The mounting direction in the vertical plane is, as shown in FIG. 2, mounted so as to be inclined upward such that the tip end thereof is at an upper position. A groove-shaped notch 22a is provided around the periphery of the rotating body 22 so that the soil can be guided to the inside.
Are formed at a plurality of locations.

Therefore, the revolving unit 2 is driven by the revolving device 17.
2 and the excavating arm 24 are rotated, a small-diameter guide hole is excavated in the center by the excavating bits 21 and 23 provided respectively, and a large-diameter standing hole 2 is formed in an upper peripheral portion thereof. Is excavated.

At this time, the earth and sand excavated by the excavating arm 24 naturally moves to the center depending on the mounting position and the mounting angle of the excavating arm 24.
From the notch portion 22a of the revolving unit 22, the revolving unit 22 is dropped and collected inside.

Further, the fixing device 19 includes the cylindrical body 13.
Pressing jack devices 41 projecting from the upper outer peripheral surface in all directions, a pressing plate 42 attached to the tip of a retractable rod portion of each pressing jack device 41, and protection of each pressing jack device 41. The cylindrical body 13 can be supported in the upright hole 2 by pressing each of the press plates 42 against the inner wall surface of the upright hole 2.

The working crane 3 is provided on a gate-shaped crane main body 52 which is movable on left and right guide rails 51, and is provided on a horizontal girder portion 52a of the crane main body 52 so as to be freely movable and winch. Device 5
A grab bucket for discharging the excavated earth and sand in the upright hole 2 is provided in the winch device 55 of the one traverse truck 53. 57 are suspended. In addition, the winch device 56 provided on the other traversing carriage 54
The cylindrical casing 11 is carried in.

In FIG. 1, reference numeral 61 denotes a sprayer which is provided on the outer peripheral portion of the cylindrical casing 11 so as to be able to move up and down, and sprays, for example, concrete or the like on the inner wall surface of the vertical hole 2.

Next, the operation of excavating the vertical hole will be described.
First, the work crane 3 is arranged above the upright hole 2 to be excavated, and a hole is formed in which the cylindrical body 13 and the cutter head 18 which are the main body of the excavator can be inserted.

Next, after inserting the cylindrical body 13 and the cutter head 18 into the holes, the cylindrical body 13 is fixed by the fixing device 19, and an outrigger device (FIG. (Not shown) to be supported on the ground.

Next, the cutter head 1 is rotated by the turning device 17.
8 and gradually slide the jack 1
4, the slide member 15 is moved downward, and the cutter head 18 is lowered to perform excavation.

At this time, as described above, since the excavation arm 24 is provided obliquely upward toward the outside and its mounting position is eccentric with respect to the center, the excavation arm 24 The excavated earth and sand naturally moves toward the center of the revolving structure 22, and falls into the revolving structure 22 from a cutout portion 22a formed around the revolved structure.

The excavated earth and sand that has fallen into the revolving unit 22 is discharged from a traversing truck 53 provided on the crane body 52 to the outside by a grab bucket 57 suspended in the tubular unit 13 and the revolving unit 22. You.

When the excavation is performed to a predetermined depth, the fixing device 19 is released, the sliding jack 14 is contracted, and the cylindrical body 13 is lowered using the lifting jack 12. The cylindrical casing 11 is added to the upper end of the, and excavation is subsequently performed in the same procedure as described above.

As described above, while lowering the cylindrical body 13 and the cutter head 18, the cylindrical casing 1
By adding 1, the standing hole 2 having a predetermined depth can be excavated.

After excavating the vertical hole 2 having a predetermined depth,
What is necessary is just to pull up the cylindrical casing 11, the cylindrical body 13, and the cutter head 18 by the procedure reverse to the above. Further, as each jack shown in the above embodiment, for example, a cylinder device is used.

[0029]

As described above, according to the structure of the present invention, a hole can be excavated by the cutter head rotatably provided on the cylindrical body, and the earth and sand excavated by the cutter head can be revolved. The fallen excavated soil can be easily discharged by, for example, a grab bucket, so that a large-diameter vertical hole can be easily excavated with a cutter head, and the excavated earth and sand is also removed as in the past. The water can be discharged without using water, so that the configuration of the entire apparatus can be simplified and the excavation work can be greatly simplified.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a vertical excavator according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the vertical hole excavator in the embodiment.

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

FIG. 4 is a view taken in the direction of arrows BB in FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vertical hole excavator 2 vertical hole 11 cylindrical casing 12 lifting jack 13 cylindrical body 14 sliding jack 15 slide member 16 revolving bearing 17 revolving device 18 cutter head 19 fixing device 21 excavating bit 22 revolving body 22a notch portion 23 Drilling Bit 24 Drilling Arm

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teruichiro Tanaka 2-3 Kandashicho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Kenji Asada 5-3-1 Nishikujo, Konohana-ku, Osaka-shi, Osaka No. 28 Hitachi Zosen Corporation (72) Inventor Joji Sato 5-28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Zosen Corporation

Claims (1)

(57) [Claims] 1. A cylindrical body supported up and down through a cylindrical casing, a slide member externally fitted to and held by the cylindrical body via a slide device, and a pivot bearing mounted on the slide member. And a cutter head which is held by the turning device and is turned by the turning device. The cutter head is provided on a cylindrical turning body provided with a drilling bit on a lower end surface, and on an outer peripheral surface of the turning body. It comprises a plurality of excavating arms radially projecting and provided with excavating bits on one side, and further eccentrically attaches the excavating arms to the center of the cylindrical body, A vertical hole excavator, wherein a notch for taking in the earth and sand excavated by each of the excavating arms is formed in the revolving body.