JP3212402B2 - All casing excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to relates to all casing drilling machine for standing anti drilling or basic anti <br/> Construction.

[0002]

Drilling and maintenance of the Related Art adit provided in the ground, when Zo設the standing pit to be used for inspection or the like, pushing the casing tube into the ground with all casing excavator, the standing anti by the casing tube The hole wall is maintained, and the soil inside the casing tube is excavated and discharged.

A conventional all-casing excavator will be described with reference to FIGS. FIG. 5 shows a state of excavation by a conventional all-casing excavator, and FIG. 6 shows details of a rotary drive unit.

The main body 2 of the all-casing excavator 1 includes:
A holder 4 for holding the casing tube 3 is provided,
The casing tube 3 is tightened and held by the holder 4 by driving the holding cylinder 5. The main body 2 is supported by a base 18 via a hydraulic cylinder 6 so as to be able to move up and down.
, The casing tube 3 moves up and down together with the main body 2. The holder 4 is rotatably supported by the main body 2 and is rotated by the drive motor 7.

As shown in FIG. 6, the holder 4 is supported by the main body 2 via a swivel bearing 8, and a thrust load and a radial load are supported by the swivel bearing 8. Body 2
, A drive motor 7 is attached, and a pinion 9 is attached to an output shaft of the drive motor 7. The pinion 9 meshes with a gear 10 provided on the holder 4 side, and the drive motor 7
Of the holder 4 via the pinion 9 and the gear 10
Is rotated.

The tip (lower end) of the casing tube 3
Is provided with a digging blade 11, and the ground is cut into a cylindrical shape by the digging blade 11. The earth and sand in the casing tube 3 is excavated and discharged by the excavation bucket 12.

[0007] Reference numeral 13 in FIG. 5 denotes a level cylinder, and the level cylinder 13 keeps the main body 2 horizontal.

[0008] Upon the standing pit to Zo設, set up all casing excavator 1 on standing anti Zo設position, level cylinder 13
To adjust the main body 2 horizontally. Casing tube 3
Is mounted on the holder 4, and the holder 4 is rotated by driving the drive motor 7. At the same time, the main body 2 is lowered by driving the hydraulic cylinder 6, and the casing tube 3 is pushed into the ground. Cutting the ground into a cylindrical shape by digging edge 11 of the casing tube 3, drilling by the bucket 12 the sediment in the casing tube 3, and earth removal, to form a standing anti.

[0009] Then, pull the casing tube 3 as well as concrete is for waterproofing necessary to build a standing pit filled with mortar or the like to the hole wall.

[0010]

THE INVENTION Problems to be Solved In recent years, large-diameter standing pit (φ
Excavation of 3m to 8m, etc. and large diameter foundation pits (3m to 5m)
m) is desired. In the conventional all-casing excavator 1, since the main body 2 and the holder 3 are integrally formed via the swivel bearing 8, the excavating diameter can be applied only up to about φ2 m in relation to the transport size and transport weight. .

[0011] Therefore, if you are building the foundation pit of the standing pit and large diameter of the large diameter, is at present is performing the excavation work by hand, safety was at stake are many costs construction period is long low .

[0012] The present invention has been made in view of the above situation, and provides all casing drilling machine capable of excavating the standing anti and basic anti large diameter, have been standing anti及<br/> beauty basis of a large diameter An object of the present invention is to construct a pit safely and in a short period of time at low cost.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to an all-casing excavator for excavating a shaft or excavating a foundation pit by pushing a casing tube into the ground, thereby holding the casing tube and surrounding the excavator. A holder that is divided in a direction, a body that is rotatably and vertically movable and that is divided in a circumferential direction,
A plurality of radial rollers for supporting the interposed retainer in the radial direction across the body and the holder, and a plurality of thrust rollers which support the over the body and the holder interposed holder in the thrust direction The plurality of radial rollers and
And thrust rollers are arranged along the same circumference .

[0014]

[Function] Supporting the holder to the main body along the same circumference
The main body and the holder are separated by a plurality of radial rollers and thrust rollers arranged in a horizontal direction, and the main body and the holder are divided in the circumferential direction. Does not occur.

[0015]

1 is a side view of an all-casing excavator according to an embodiment of the present invention. FIG. 2 is a view taken along the line II-II in FIG.
3 is a view taken along the line III-III in FIG. 2, and FIG.
The view along the line IV-IV is shown.

The main body 22 of the all-casing excavator 21
Are divided into two parts in the circumferential direction, and are integrally connected by connecting pins 23. The main body 22 has a casing tube 2
A holder 25 for holding the casing 4 is rotatably provided, and the casing tube 24 is tightened and held by the holder 25 by driving a holding cylinder 26. The holder 25 is divided into two parts in the circumferential direction and is integrally connected by the connection pins 19. The holder 25 is supported on a gantry 29 via a hydraulic cylinder 27 and a level cylinder 28.
, The casing tube 24 moves up and down together with the main body 22. The horizontal state of the main body 22 is maintained by the level cylinder 28. The main body 22 is in the circumferential direction.
Although it is divided into two, it may be divided into three or more. Ma
In addition, not limited to the connection by the connection pin 23,
It is also possible to connect and connect with a connecting member such as a nut.
You.

As shown in FIGS. 2 and 3, the holder 25 at the portion supported by the main body 22 is provided with six radial rollers 31 via radial roller pins 30 in the circumferential direction. A radial receiver 32 is formed on the inner periphery of the main body 22 in the circumferential direction.
1 is rolling contact. The holder 25 is supported by a radial roller 31 in the radial direction (the horizontal direction in FIG. 3).

As shown in FIGS. 2 and 4, thrust rollers 34 are provided at 16 positions in the circumferential direction of the holder 25 at the portion supported by the main body 22 via thrust roller pins 33. Thrust roller 3 is provided on the inner periphery of main body 22.
4, a thrust receiver 35 is formed in the circumferential direction, and a thrust roller 34 is in rolling contact with the thrust receiver 35. The holder 25 is supported by a thrust roller 34 in the thrust direction (vertical direction in FIG. 4).

As shown in FIG. 4, a drive motor 36 is mounted on the main body 22, and a pinion 38 is mounted on an output shaft 37 of the drive motor 36. The pinion 38 meshes with a drive gear 39 provided on the holder 25 side, and the holder 25 is rotated via the pinion 38 and the drive gear 39 by driving of the drive motor 36.

As shown in FIG. 4, a clamp pump 40 is mounted on the holder 25, and a pinion 42 is mounted on the input shaft 41 of the clamp pump 40. The driving of the clamping pump 40 operates the holding cylinder 26. The pinion 42 meshes with a holding gear 43 provided on the main body 22 side, and the rotation of the holder 25 causes the holding gear 43
The clamp pump 40 is driven via the pinion 42.

Reference numerals 44 in FIG. 3 and FIG.
And a seal interposed between the holder 25 and the holder 25.

[0022] Upon that Zo設the stand anti by all casing excavator 21 having the above structure, equipped with a casing tube 24 to the holder 25, rotates the holder 25 by the drive motor 36. At the same time, the main body 22 is lowered by driving the hydraulic cylinder 27, and the casing tube 24 is pushed into the ground. At this time, the thrust force of the holder 25 in the thrust direction is supported by the sixteen thrust rollers 34 to transmit thrust to the casing tube 24, and the force of the holder 25 in the radial direction is supported by the six radial rollers 31. Thus, the axis of the casing tube 24 is maintained.

[0023] After pushing the casing tube 24 into the ground, excavating the bucket earth and sand in the casing tube 24, and earth removal, to form a standing anti.

Since the holder 25 is supported by the main body 22 by the radial roller 31 and the thrust roller 34, the main body 22 and the holder 25 can be separated. Also,
By removing the connection pin 23, the main body 22 is divided into two parts,
By removing the connection pin 19, the holder 25 is divided into two parts. Therefore, by dividing the all casing excavator 21 can be transported to the site, even if the all casing excavator 21 in order to construct a standing pit of a large diameter to a large, transport dimensions and interfere with transport weight does not occur. Therefore, it is possible to eliminate the drilling operations manual when building <br/> elevational pit of a large diameter.

[0025]

According to the present invention all casing drilling machine of the present invention, the same
The holding member of the casing tube is held on the main body via a radial roller and a thrust roller disposed along one circumference, and the holding member and the main body can be divided in the circumferential direction. And the holder and the main body can be divided and transported separately, and even if the all-casing excavator is made large in order to construct a large-diameter shaft or foundation shaft, the transportation dimensions and the transportation weight will be affected. Disappears. As a result, the all-casing excavator enables excavation of large-diameter shafts and foundation shafts,
Construction of large diameter shafts and foundation shafts can be performed safely, in a short time and at low cost.

[Brief description of the drawings]

FIG. 1 is a side view of an all-casing excavator according to one embodiment of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

FIG. 3 is a view taken along the line III-III in FIG. 2;

FIG. 4 is a view taken along line IV-IV in FIG. 2;

FIG. 5 is a side view of a conventional all-casing excavator.

FIG. 6 is a detailed view of a rotation drive unit.

[Explanation of symbols]

 21 All-casing excavator 22 Main body 24 Casing tube 25 Holder 26 Holding cylinder 27 Hydraulic cylinder 31 Radial roller 34 Thrust roller 36 Drive motor

────────────────────────────────────────────────── (5) References JP-A-59-228586 (JP, A) JP-A-1-98917 (JP, U) JP-A-61-155496 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) E21B 7/20 E21D 1/03-1/04

Claims (1)

(57) [Claims] An all-casing excavator for excavating a shaft or digging a foundation by pushing a casing tube into the ground. And a plurality of radial rollers interposed between the main body and the holder and supporting the holder in the radial direction, and interposed and held between the main body and the holder. A plurality of thrust rollers for supporting the tool in the thrust direction , wherein the plurality of radial rollers and the
An all-casing excavator wherein last rollers are arranged along the same circumference .