JPS60192092A - Small caliber shield drilling machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The author of the book concerns small diameter shield tunneling machines.

The structure of the conventional example and its problems [Some 1-diameter shield excavators do not have a screw-type earth removal device. Conventionally, this type of shield excavator has a screw-type earth removal device consisting of a cylindrical casing and a screw blade, which is connected to the front end of the rotary shaft of the blade so that it can rotate. It was also equipped with a hydraulic swivel for adjusting the direction of the shield body. Therefore, in this case, it was necessary to install oil piping for hydraulic pressure squeezing inside the narrow shield body, making the structure extremely complicated.

OBJECTS OF THE INVENTION It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and to provide a method for small diameter shield excavation.

Structure of the Invention In order to achieve the above object, the small-diameter shield excavator of the present invention is provided with a screw-type earth removal device consisting of a cylindrical casing and screw blades in the shield main body, and a cutter head with a In a small-diameter shield excavator connected to the front end of the rotating shaft of the screw blade, the front end of the cylindrical casing is placed 11 mm above the front end of the shield body.
The shield main body is made to protrude with approximately the same outer diameter Cb, and an inclined surface that is inclined toward the core of the shield main body 61 is formed on the outer part of the front part, and the cylindrical casing is rotated. The rotary drive device is -H.

Embodiment and Function An embodiment of the present invention will be described below with reference to FIGS. 1-5. In Figures 4 and 5, 1 is a small shield body with a diameter of 1, and there is one screw inside 1) 11
A device u2 is arranged 5Q. This screw-type earth removal device 12 is composed of a 1n-shaped gauging 3 and a screw blade 5 rotatably disposed within the cylindrical casing 3 and rotated via a rotation shaft /l. [
When the open part-shaped casing 3 is supported within the shield main body 1 via the swing bearing 6, it is connected to a first rotational drive device (Jξ, which will be described later).
It is designed to be rotated by being interlocked with the The front end of the cylindrical casing 3 is made to protrude forward from the front end of the shield main body 1 with approximately the same outer diameter as the shield main body 1, and this front end has a bevel-shaped opening at the front. Excavation earth guide four parts 3a are formed, and a large number of cutter bits 7 are attached to the surface of the four guide parts 3a.Furthermore, half of the outer peripheral surface of the front end of the cylindrical casing 3 is attached to the shield body 1@center side. The inclined surface 3b is sloped (the slope a is 1/10) in the middle part.

The front end of the rotating shaft 4 of the screw blade 5 is formed into a conical part 4a that widens toward the front end, and a number of cutter pins 1-8 are provided on this surface (44).

The surface of this conical portion 4a is sloped to be slightly gentler than the slope of the surface of the guide recess 3a of the cylindrical casing 1, so that the entrance of the excavated earth and sand intake space A is wide and goes deep. The screw blade 5 is extended to the conical portion 4a. A cross-shaped cutter head 9 is attached to the front end of the rotary shaft 4, and the rear end is operatively connected to a first rotary drive 4 neck (not shown) and is also connected to a telescopic seat lever (described later). Then, the rotating shaft 4, that is, the cutter head 9
5. Next, the driving part will be explained with reference to Figures 1 and 3). Note that the drawing shows a state in which the shield main body is connected to a drive device 11 via a hook 10 and placed on a starting frame 12. Of course, one screen type 1
1 [1 Insert 2 is also added and driven via the cylindrical non-no-tang 3' and the seven screw blades'. 11(
, stay connected. L drive unit V] 11 is slidable in the forward direction or direction via the starting frame 121 i, 2 III forward direction: ν 13, etc.
f: Rotate 1-shaped Cushing 3 1! To the first rotational drive 4,
), Sukuri]tsuha (141) and Kattahera 1-1)
Rotate (↓ru) '12 rotation drive limb M ¥ (for example, gitotoshiri) 1 (), slur r 1 integral 14, 2nd eaves,
Isuzusu 14 + 1G (I') support stand 17 which 13th) 1・(rotated and rotated tlIIll 4 all ;5
Tsunotsutahed 9) 1 Meng, ＼Uru Pair of expansion and contraction demons・
The cylindrical casing 3 is inserted between 1-18 and the cargo (1 slide 14 11 times, the support 1 of the drive device 15) and the cylindrical casing 11. It is composed of a one-turn drive IJ + mounting 15 and an extension and contraction jig (toe 1-20) that adjusts the connection gap i + iJ. 21
1) Part 11 of 12 - Ta-j
This is a support roller for supporting the shield body side. Reference numeral 22 indicates a tank for receiving earth and sand installed in the starting frame 12. In addition, in FIG. , for detecting the direction of movement of the shield body 1.

Next, work 01 will be explained.

During normal excavation [In this case, the 11th l'3! l solid line 1
As shown, move the cutter head 9 closer to the cylindrical casing 3 and press the IJ angle 11! ? cutter bed 9
Then, the screw blade 5 is rotated to perform excavation. If coarse gravel is mixed in other piles, the cutter head 9 is moved in and out using the telescopic slider 18, and the 1N-shaped casing 3 is rotated 1! (The coarse gravel is crushed between the guide recess 3a and the conical part 4a.) If the coarse gravel enters the guide space △, rotate the cylindrical casing 3 or 4J to crush it. Of course, the direction of rotation 7) of the cylindrical casing 3 can be selected in either direction.
, one (IJI is issued backwards.

Next, when correcting the direction of the shield main hole 1, the cylindrical shape 9
- In the direction in which you want to correct the inclined surface 31) on the outer circumference of the front end of rung 3, move it to the 1/34 side, and in this state, 71 - Swing and rotate to the right within a small angle range! while il+
! When cutting, the shield body 1 is bent in the desired direction by the reaction force from the ground acting on the (1f! diagonal 3b of the Since the reaction force from the reservoir 111 acts uniformly on the entire circumference A), it will not bend.

As a result of the invention, when the configuration of the present invention described above is applied, a 1l.
Since the sink is rotated, for example, the upper casing can be rotated, so for example, the cylindrical casing can be rotated within a small angle range. When the shield rotates left and right, the reaction force from the ground +l+ acts on the -1- marked inclined surface, bending the shield body in the opposite direction to the inclined surface.
:Eel oil F4-Since no special equipment such as a jack is required, the structure inside the shield body is simplified.

[Brief explanation of drawings]

The drawings show an example of the present invention; FIG. 1 is an overall side view, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. 4 is an enlarged side view of the main parts. FIG. 5 is a view taken along the line T--T in FIG. 4. 1...Shield body, 2...Sukuri-type earth removal device, 3.3'...Cylindrical gauging, 3a...Guiding recess, 31)...(ψr1), 4...・Rotating axis, 4a・
・・Conical part, /11) ・・Hollow hole, 5,5′ river blade, 7° 8 ・・Cutter pitch 1~. 9... Cutter head, 12... Starting frame, 14... Slide body, 15... First rotary drive #h K'd'l, 16...
...Second rotary drive device, 18.20... Telescopic jack agent Yoshihiro Morimoto

Claims (1)

[Claims] 1. When a cylindrical casing screw-type earth removal device u is installed inside the shield body, a cutter head is installed at the tip.
A small diameter shield is connected to the front end of the rotating shaft of the blade. At the same time, a part of the outer periphery of this front end is formed with an inclined surface that slopes toward the axis of the shield, and a rotary drive device for rotating the cylindrical casing; ] A small [ ] diameter shield excavator.