JPH0227093A - All section type excavating machine - Google Patents

Abstract

PURPOSE:To solve problem of unexcavated part by furnishing a plurality of self-rotating cutters arranged firmly at the facade of the body of an excavating machine, which makes simultaneous excavations of the whole section, and an aux. cutter of rotary drive type having a drive means which can move in gaps between these rotary cutters. CONSTITUTION:On the facade of a front frame 1a of a whole section excavating machine 1, self-rotating cutters 2 formed radially from the rotary shaft are arranged one by one at certain spacings above and below the facade, and bits 3 protruded for the purpose of facing excavation are arranged on the front and rear. The cutters 2 are incorporated in the frame 1a and given self rotating motive by means of coupling of the rotary shaft with a motor. Aux. cutters 4 of rotary drive type moving up and down along beams 6 on both sides of the front frame 1a are formed radially from the rotary shaft, and a protruding bit 5 is arranged to excavate residual facing on the front and sides. Thus the whole surface can be excavated simultaneously without any unexcavated portions.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a full-section excavator, and more particularly, it relates to a full-section excavator, and more particularly, to a full-section excavator for all types of endless tunnels such as perfect circles, ellipses, horseshoes, etc., especially for large-diameter tunnels in deep layers. It relates to a full section excavator capable of excavating sections substantially simultaneously.

<Prior Art> Most tunnels excavated by excavators used in conventional shield construction methods have a circular cross section. However, recently, there has been a demand for an excavator for excavating holes with an oval cross section, and for example, an excavator equipped with two rotary cutters on a frame having an oval outer shell has become known. There is. However, this excavator has a problem in that a portion of the excavation face remains unexcavated, and efforts are being made to develop an excavator that can simultaneously excavate a scheduled excavation portion without leaving any unexcavated area.

In addition, with the concentration of population in large cities, a highly reliable power supply has become important, and underground substations, underground power plants, power storage facilities using superconducting and compressed air, fuel storage facilities, underground cable tunnels, etc.
Various energy facilities such as common ditches have become necessary. However, underground in large cities, various facilities and foundations are laid out in all directions, making it difficult to locate new large-scale energy facilities.Therefore, it has been proposed to construct tunnels deep underground. has been done. The installation of tunnels installed deep underground is considered to be advantageous from an economic and technical standpoint, even in areas where land prices are soaring or where buildings such as houses and buildings are densely packed. The installation of various energy facilities in urban areas
It's becoming a reality. Therefore, in order to excavate a large diameter tunnel deep underground, the planned tunnel cross section can be excavated at the same time without leaving anything behind.
Moreover, there is a desire to develop an excavator that can accommodate various cross-sectional shapes.

<Problems to be Solved by the Invention> The present invention is based on the above-mentioned need, and its purpose is to provide a full-section excavator that can excavate the entire cross-section of a planned tunnel with a small number of cutters without leaving any uncut parts. Our goal is to provide the following.

<Means for Solving the Problems> The present invention has solved the above-mentioned problems, and its gist is an excavator that excavates the entire cross section of a scheduled tunnel at the same time. The machine includes a plurality of self-rotating cutters fixedly disposed at a predetermined position on the front surface of the excavator main body, and a plurality of rotationally driven cutters having an egg-moving means capable of moving through gaps between the plurality of self-rotating cutters. A full-section excavator equipped with an auxiliary cutter.

The self-rotating means of the self-rotating cutter and the auxiliary cutter include known rotating means such as an electric motor. In addition to the gear that runs along the beam, drive means that can move the rotationally excited auxiliary cutter through the gap include:
This includes one in which a cable such as a chain or a wire rope is moved by an electric motor or the like, and the moving direction thereof can be moved vertically or horizontally depending on the shape of the gap between a plurality of self-rotating cutters. Furthermore, the shapes of the self-rotating cutter and the rotary-driving auxiliary cutter include those formed radially from their respective rotating shafts, and by combining the self-rotating cutter and the rotary-sleeping auxiliary cutter, The shape to be excavated corresponds to the shape of the face to be excavated.
For example, it is possible to fit any endless shape such as a perfect circle, oval, or horseshoe shape.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings, but the present invention is not limited thereto.

In FIG. 1, 1 is a full-section excavator, and the full-section excavator 1 is composed of a front frame 1a and a rear frame 1b. On the front surface of the front frame 1a, self-rotating cutters 2 radially formed from a rotating shaft are installed with one each fixed in position at an upper part and a lower part of the front surface with a gap in between, A plurality of protruding pits 1-3 for excavating the face are arranged on the front and side surfaces of the excavator.

The self-rotating cutter 2 is connected to a known electric motor (not shown) installed in the front frame 1a via a rotary shaft to perform self-rotating action. Reference numeral 4 denotes a rotationally driven auxiliary cutter that reciprocates up and down along a beam 6 attached to both sides of the front frame 1a, and the auxiliary cutter 4 is formed by the two self-rotating cutters 2. The auxiliary cutter 4 is positioned in the intermediate plane between the surface of the self-rotating cutter 2 and the front surface of the front frame so as to be able to move through the gap, and the shape of the auxiliary cutter 4 is formed radially from the rotation axis, and its front surface A plurality of protruding bits 5 are disposed on the sides and for excavating the face left by the self-rotating cutter 2.

Next, in FIGS. 2 and 3, 4a is a support frame for the auxiliary cutter 4, and a known electric motor 4b installed in the support frame 4a and the auxiliary cutter 4 are connected via a reducer and a rotating shaft. By connecting, the auxiliary cutter 4 can be rotated by itself. Further, in order to make the auxiliary cutter 4 travel along the beam 6, a drive motor 4c installed in the support frame 4a is connected to a beam moving gear 4d via a rotating shaft and a speed reducer, and By meshing the gear 4d with a rack 4e provided in the beam 6, the auxiliary cutter 4 can run along the channel 4f provided in the beam 6. At this time, by converting the rotation of the drive motor 4C clockwise or counterclockwise, the auxiliary cutter 4 can be reciprocated up and down.

In FIG. 1, reference numeral 7 denotes grippers for fixing the front frame [a] to the excavation shaft, and eight grippers are arranged behind the front frame 1a. 8 is a hydraulic cylinder for propelling the full-section excavator 1 forward, and connects the front frame 1a and the rear frame 1b. 9 is a gripper for fixing the rear frame 1b to the excavation hole;
Like the grippers 7, eight grippers are provided on the rear frame 1b. Reference numeral 10 denotes a remote control communication cable, which transmits a command signal to a control device installed in each drive device.

Next, the operation of the full-section excavator will be explained.

First, the full-section excavator 1 is installed in a spatial region underground that is a construction site. Next, a command is transmitted from the monitoring room on the ground using the remote control communication cable 10, and the front frame 1a is
The gripper 7 and the gripper 9 disposed on the rear frame 1b are extended, the full-section excavator 1 is fixed in the planned excavation hole, and the self-rotating cutter 2 is rotated to remove the front face. The face is excavated. Subsequently, the rear frame 1b is held fixed in the excavation shaft, the gripper 7 installed on the front frame 1a is contracted, and the hydraulic cylinder 8 is extended to propel only the front frame 1a forward. Simultaneously with the propulsion of the front frame 1a, the self-rotating cutter 2 and the rotationally driven auxiliary cutter 4 are made to self-rotate;
By reciprocating the two auxiliary cutters 4 along the beam 6, the face of the entire planned tunnel cross section can be excavated substantially simultaneously without leaving any excavation left behind. Next, when the extension of the hydraulic cylinder 8 reaches the maximum, the gripper 7 is extended and the front frame 1a is fixed in the excavation hole, and then the gripper 9 is contracted and the hydraulic cylinder 8 is also contracted to remove the rear frame 1b. propel the forward. By repeating such operations under control from the monitoring room, the face can be excavated in an elliptical shape while the full-section excavator 1 is being propelled. If the shape of the cross section to be excavated is different, the number and location of self-rotating cutters 2 (pitch, etc.)
By changing this, it is possible to easily excavate the face in accordance with the cross section to be excavated.

<Effects of the Invention> The full-section excavator of the present invention is equipped with an auxiliary cutter that excavates by moving through the gap between the self-rotating cutters.
With a small number of cutters, the entire cross section of the planned tunnel can be excavated substantially simultaneously without leaving any uncut parts. Further, by installing a self-rotating cutter according to the shape of the face to be excavated, it is also possible to excavate various cross-sectional shapes.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a full-section excavator, FIG. 2 is a cross-sectional diagram of a rotary auxiliary cutter and a beam, and FIG. 3 is a schematic diagram showing the inside of the beam. 1. Full-section excavator, 2. Self-rotating cutter, 4. Rotation-driven auxiliary cutter, 6. Beam, 7. Gripper.

Claims (1)

[Scope of Claims] 1) An excavator that excavates substantially the entire cross section of a planned tunnel at the same time, and the excavator includes a plurality of self-rotating machines fixed at predetermined positions in front of the excavator main body. A full-section excavator comprising a cutter and a plurality of rotationally driven auxiliary cutters having drive means capable of moving through gaps between the plurality of self-rotating cutters. 2) The full-section excavator according to claim 1, wherein the self-rotating cutter and the rotationally driven auxiliary cutter are formed radially from their respective rotating shafts.