JP3062897B2 - Side hole 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 horizontal hole excavator used for digging a horizontal hole in underground burial and crossing work such as sewerage, water supply and telephone cable.

[0002]

2. Description of the Related Art A small-diameter horizontal hole excavator for a fume pipe in which a rock drill does not enter a hole is described in Japanese Patent Publication No. Sho 61-56391. .

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a side hole excavator having a higher efficiency than a conventional side hole excavator.

[0004]

The present invention will be described with reference to the drawings. In the horizontal hole excavator equipped with the squaring cutter unit according to the present invention, the cylindrical tuyere 16 is arranged at the front of the tube 14 to be pushed into the horizontal hole 11, and the rotary cutter 25 is provided at the front side of the tuyere 16. A cutter unit 1 comprising a side hole excavator arranged and rotatably supporting a substantially cone 2 on a cone shaft 9 and projecting a number of corners 8 from the conical surface of the circular cone 2.
, A plurality of cutter units are arranged in a planetary manner, and the front end of the trajectory formed when each cutter unit 1 rotates is convex forward in a direction substantially orthogonal to the center axis PP of the cylindrical tuyere. It is configured to be located on the tapered surface S.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A sealing material 12 is provided in a lateral hole 11 provided in a land 10.
A cylindrical tuyere 16 is arranged via a partition wall 15 at a front portion of a tube 14 where the tube is arranged and pushed in, and a rotary cutter 25 is arranged at a front side of the cylindrical tuyere 16 to constitute a horizontal hole excavator. Have been.

[0006] The water supply channel 41 from the water pump 40 is branched into two, and one of them is connected to the first wall of the partition wall 15 via the first water channel 42.
The second discharge port 4 in the peripheral wall of the pipe body 14 near the partition wall 15 is connected to the discharge port 43 and the other is connected via the second water supply passage 44.
5 and the first water supply channel 43 and the second water supply channel 44
Are provided with flow control valves 46 and 47, respectively, and a drainage channel 48 is provided below the partition wall 15 to communicate with the outside of the horizontal hole 11.

When excavating hard bedrock or hard soil, water is sent only from the second discharge port 45 or from the second discharge port 45 and the first discharge port 43, and while the corner 8 is water-cooled, the shaved soil and stone are removed. To the drainage channel 48 together with water and is taken out by the drainage pump 49.

A water ring type differential planetary speed reducer 55 is arranged in the tuyere 16 on the front side of the partition wall 15, and the output shaft of a motor 56 arranged on the rear side of the partition wall 15 is passed through the partition wall 15 to form a water seal type differential. The rotary output portion of the water-ring type differential planetary speed reducer is connected to the rotary cutter 25.

Since the water ring type differential planetary speed reducer 55 is provided in the tuyere 16, the whole can be miniaturized. In addition,
In the figure, reference numeral 57 denotes an input shaft, 58 denotes a double type planetary gear, a plurality of which are radially held by a rotating gear frame 59 and have a first gear 61 and a second gear 62. 60 is the partition wall 15
And fixedly engaged with the second gear 62. A sun gear 63 is fixed to the input shaft 57 and meshes with the first gear. Reference numeral 64 denotes an inner gear that rotates integrally with the rotary cutter 25. 65 is a bearing interposed between the input shaft 57 and the inner fixed gear 60, and 66 is a bearing interposed between the inner fixed gear 60 and the inner gear 64.

A frusto-conical crusher cone 70, which rotates together with the rotary cutter 25, is disposed in the tuyere 16 in the rearward extension, and the frusto-conical crusher cone 70 is positioned with respect to the central axis PP of the cylindrical tuyere 16. The central axis QQ is eccentric, and the external gear-shaped uneven portion 7 is provided at the rear end of the crusher cone 70.
1, a guide cone 73 consisting of an internal gear-shaped convex / concave portion 72 and a frusto-conical portion extending forward and forward is disposed and fixed in the cylindrical tuyere 16 immediately after the external gear-shaped concave / convex portion 71. It is.

The crusher cone 70 has an inner gear 6
4 is fitted and fixed. The crusher cone 70 rotates together with the rotary cutter 25, and the rotary cutter 25 rotates.
The large rock in the rock crushed by the crushed portion is crushed by being sandwiched by the uneven portion 71 that rotates eccentrically when passing between the uneven portion 72 and the uneven portion 71.

The cutter unit 1 comprises a substantially cone 2 rotatably supported on a cone shaft 9 and a large number of corners 8 projecting from the conical surface of the cone 2. Arrange the units in a planetary fashion. Three cutter units 1 are arranged on the substrate 29 on a total of three concentric circles each having a diameter R1, a diameter R2 larger than the diameter R1, and a diameter R3 larger than the diameter R2. The configuration is such that the front end of the trajectory formed when each cutter unit 1 rotates is positioned on a forwardly convex tapered surface S that is substantially perpendicular to the central axis PP of the cylindrical tuyere.

Reference numeral 27 denotes a substrate of the rotary cutter 25, which is fixed to the inner gear 64. Reference numeral 28 denotes an abutment fixed to the substrate 27, on which the conical shaft 9 is supported. Reference numeral 29 denotes a cylindrical cover of the rotary cutter, and a front surface is provided with a window hole 30 corresponding to the position of each cutter unit 1 so that a tapered surface S is formed on the front side of the cover 29.

When the rotary cutter 25 is rotated while pushing the pipe 14 with the propulsion jack 17 (with the interposition of the hyume pipe 13 as necessary), the cone 2 rotates around the cone axis 9.
Rotates and scrapes the bedrock at corner 8.

[0015]

According to the present invention, excavation can be performed extremely efficiently.

[Brief description of the drawings]

FIG. 1 is a side view of a construction site.

FIG. 2 is a partially omitted side view of the excavator.

FIG. 3 is another partially omitted side view of the excavator.

FIG. 4 is a side view in which a lower half part is omitted in a vertically symmetric water ring type differential planetary reduction gear;

FIG. 5 is a side view of the cutter unit.

FIG. 6 is a front view of the rotary cutter.

FIG. 7 is a view along AA in FIG. 6;

FIG. 8 is a front view in which the BB cutting machine in FIG. 3 is omitted.

DESCRIPTION OF SYMBOLS 1 Cutter unit 2 Cone 8 Corner 9 Cone axis 10 Land 11 Side hole 12 Seal material 13 Fume tube 14 Tube 15 Partition wall 16 Cylindrical tuyere 17 Propulsion jack 25 Rotary cutter 27 Substrate 28 Abutment 29 Cover 30 Window hole 40 Water pump 41 Water supply channel 42 First water supply channel 43 First discharge port 44 Second water supply path 45 Second discharge port 46 First flow control valve 47 Second flow control valve 48 Drainage channel 49 Drain pump 55 Water Sealed differential planetary reducer 56 Motor 57 Input shaft 58 Double type planetary gear 59 Gear frame 60 Inner fixed gear 61 First gear 62 Second gear 63 Sun gear 64 Inner gear 65 Bearing 66 Bearing 70 Crusher cone 71 Concavo-convex part 72 Concavo-convex part 73 Guide cone PP Tuyere center axis Q-Q Crusher cone Heart axis S tapered surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-272386 (JP, A) JP-A-62-117991 (JP, A) JP-A-60-87296 (JP, U) 17001 (JP, B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) E21D 9/04-9/12

Claims (1)

(57) [Claims] 1. A tubular tuyere (16) is arranged at the front of a tube (14) to be pushed into a lateral hole (11), and a rotary cutter (25) is arranged at the front side of the tuyere (16). A lateral hole excavator, wherein a substantially cone (2) is rotatably supported on a cone axis (9),
Further, a plurality of corners (8) protrude from the conical surface of the cone (2) to form a cutter unit (1), and a plurality of cutter units are arranged in a planetary manner. The configuration is such that the front end of the trajectory formed when rotating is located on a forwardly convex tapered surface (S) that is substantially perpendicular to the center axis (PP) of the cylindrical tuyere , and has a diameter (R1); Diameter greater than diameter (R1)
(R2) and diameter (R3) larger than diameter (R2)
The substrate (29) on the circumference of a total of three concentric circles
A horizontal hole excavator equipped with a square cutter unit constituting a cutter unit (1) .