JPS6282198A - Middle bent type shield excavator and its operation - 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] [Field of Industrial Application] The present invention relates to a folding type shield excavator and an operating method thereof. The present invention relates to an excavator capable of turning in intermediate directions as well as to an operating method thereof.

[Prior art]

In large cities, tunnels are excavated in various places for sewage construction, expansion of underground drainage ditches, or construction for burying electrical wiring, cable wiring, and city gas piping underground. In this case, the shield tunneling machine often excavates a curved tunnel with a horizontal curve, instead of going straight ahead, it also bends in the left and right directions. In recent years, conditions for tunnel excavation in highly developed cities have changed significantly, and shield tunneling machines often have to tunnel through existing buried objects in double-digit directions, both vertically and horizontally.

Therefore, it is desirable to have the ability to bend in the vertical direction and move in that direction, or to bend in the middle between left and right and up and down and quickly move in that direction.

By the way, there is currently no shield tunneling machine that can curve horizontally, vertically, or even in directions in between, so when the tunneling machine excavates a tunnel with three-dimensional curves, it is difficult to prepare for the excavation. The excavation work requires a lot of time and effort, and continuous excavation cannot be performed. Therefore, there is a strong desire for a shield tunneling machine that can continuously excavate tunnels having three-dimensional bends.

[Purpose of the invention]

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to enable the shield tunneling machine to quickly bend in a desired direction, so that the shield tunneling machine can continuously excavate even complexly curved tunnels. It is an object of the present invention to provide a folding type shield excavator and a method for operating the same.

[Structure of the invention]

The feature of the center-folding type shield tunneling machine of the present invention is that, as shown in FIG.
To, both 1F! A folding pin 10 that connects the I 3 in a freely foldable manner is provided so as to be freely inserted and removed, and a plurality of pairs of the folding pins 10 are arranged diagonally within the body 3.

The feature of the operating method of the center-folding type shield excavator of the second invention is that among the plurality of pairs of center-folding pins 10 that freely connect two bodies 3 adjacent in the longitudinal direction, one pair of the center-folding pins 10 is used for dual-use 3 The two are connected to make the machine move in a curved direction, and on the other hand, at least three of the folding pins 10 are inserted into the dual-use 3 to make the machine go straight.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof.

The folding type shield excavator 1 shown in the cross-sectional view of FIG. 1 is in a state in which it moves straight. The shell 3 of the shield body 2 of the excavator I is composed of a front shell 4 and a rear shell 5 that are divided into longitudinally adjacent states. The main body 2 includes a rear body 5
A connecting member 6 whose outer surface 6a is formed into a spherical shape and is fixed to the front body 4 slides on the inner surface of the front body 4 via a sealing material 7, and is freely rotatable horizontally, vertically, and in intermediate directions. It has a folded structure connected to the That is, in this example, a pin insertion tube 9a is provided at the rear end of the fixing member 8 fixed to the inner surface of the connecting member 6 and the front body 4.

9b is located at 21Ila on the ceiling and bottom of main body 2, respectively (
The pin insertion tube 9a is provided at one location on the bottom (shown in the figure).
, 9b, one bent pin 10 is inserted into and removed from the center. As shown in FIGS. 2(a) and (bl), a clevis 15a is attached to the stepped end 10a of the pin 1o, and a piston rod 15b of a hydraulic cylinder 15 for insertion and removal is connected to the clevis 15a. As shown in Fig. 1, the two inserted bent pins 10, which are diagonally paired at the ceiling and the bottom, are used when the shield tunneling machine 1 moves in the left and right direction. , is designed to be the center when the center bends in the left-right direction 20 due to the operation of the shield jack 18 described later or the combined use of the center bend hydraulic cylinder 16.Furthermore, other pin insertion tubes 14a and 14b are formed. are provided at the left and right 2 (flit locations (the one on the right in the figure)), and the pair of folding pins 11 inserted therein similarly serve as centers of folding in the vertical direction 21, and are used for insertion and removal. Hydraulic cylinders 15 are attached to each of them.
A plurality of pins (two pins are shown) diagonally in the front body 4 of the body 3 between each of the pins (not shown) diagonally therebetween.
The center-folding pins 12 and 13 arranged in pairs are the center-folding pins 10.
For example, they are provided at positions different from each other by 30 degrees in the circumferential direction from the center bending pin 11. Therefore, in order to move the excavator 1 in a three-dimensional direction, the pair of bent pins 12 are placed at that position, that is, at a position 30 degrees closer to the pin 11 than the pin 10. 4 becomes the center of the center fold in the direction of arrow 22. Similarly, the center folding pin 13 is also centered in the direction of the arrow 23 at that position. In addition, the above-mentioned bent pin 12.1
Instead of 3, both pins 10. A pair of bent pins (not shown) may be provided diagonally at 45 degrees between the '11' or multiple pairs of bent pins may be provided if space and mounting positions are secured. It's okay. The point is that it is possible to select a center bending direction that does not interfere with each other and that corresponds to the required direction of movement of the excavator 1.

In addition, the front body 4 and the connecting member 6 have an appropriate number of them (one is shown).
Each end of the hydraulic cylinder 16 for center-folding is attached, and as described above, when center-folding in each direction, each pair of two
The book is centered around a center folding pin that allows the book to be folded. The sealing material 7 described above is provided to prevent spring water and excavated soil from entering the excavation machine 1 from the face, regardless of whether it is bent or not. The front side 18a of the shield jack 18 is swingably attached to a fixed member 19 fixed to the front body 4 via a spherical joint 24, and the relative position that occurs when the front body 4 changes direction due to center bending is fixed. It is now possible to absorb changes in The tunnel wall 2 shown in FIG.
A spreader 27 is attached that contacts the front end surface 26a of the drill bit 6 and presses it to receive the digging reaction force. Shieldja
In the support device of the 7-piece 18, a web 29 of a ring girder 28 attached to the rear body 5 is provided with an insertion hole 3o for holding the rear part 18d of the cylinder body.

This example is an example that is applicable to a mud pressure type shield excavator.
In FIGS. 4 and 5, 31 is a screw conveyor that transports the excavated soil taken into the force/7-touch chamber 32 to the rear of the excavator 1, 33 is the erector 2 for assembling the segments, and 34 is the cutter disk 35. 36 is a hydraulic motor that drives a gear 37 meshing with the ring gear, and 38 is a hydraulic cylinder that further deflects the cutter disc 35 in the curved direction when the excavator 1 breaks in the middle.

According to an embodiment having such a configuration, the excavator 1 is operated as follows.
can be operated to excavate tunnels with bends in various directions.

A case in which the vehicle turns to the right in the direction of arrow 20a in FIG. 1 will be described. First, the front body 4 of the shield excavator 1 is assembled as shown in FIG.
The machine is bent in the middle by an angle θ from 1 m from the machine axis center line when traveling straight, and moved as shown by the axis line In. At this time, among the large number of folded pins, only the folded pin IO and its pair are inserted into the pin insertion tubes 9a, 9b, etc. by extension of the hydraulic cylinder 15 for insertion and removal [Fig. 2 Tar, ( Of course, the other bent pins have been removed as shown by the two-dot chain lines in the same figure (al). The Shield Jacket 18 decided to do so, and that's it.

1/ Since the soda 27 presses the front end surface 26a of the tunnel wall 26 and the right shield jack 18 is not expanded or contracted, the front body 4 is moved to the rear body 5 around the pair of bent pins 10. In contrast, it is bent and folded at an angle θ, and
It is held by a hydraulic cylinder 16 for center bending. Furthermore, the hydraulic cylinder 38 is extended, causing the cutter disk 35 to be deflected even further in the direction of movement. Subsequently, when all the shield jaws 18 are extended by different amounts of extension along the curve of the tunnel, the canter disk 35 of the excavator 1 excavates the face while sequentially rotating. The excavated soil is taken into the force transfer chamber 32, and the screw conveyor 31
It is carried out to the rear. By repeating the above-mentioned operations, the excavator 1 is able to move forward, and excavates the tunnel while changing the bending angle θ to a desired value each time. Similarly, the excavator I can easily turn to the left. Further, excavation can be similarly performed in the vertical direction 21 and in various intermediate directions between the left and right and the vertical direction, that is, in the direction of the arrow 22 and the direction of the arrow 23.

At that time, in the desired direction of the turn, insert a pair of center-folding pins that will be the center of the center-folding, and pull out the other center-folding pins. 4 and the rear body 5, it is possible to realize a desired curve.

When the excavator 1 moves straight, the front Mli 14, which has moved to the axis 1n shown in FIG. 5, is restored to the axial center line 1 m, and the excavator 1 becomes able to move straight. Then, the bent pin 10 is kept inserted, and at least three of the other bent pins 11 to 13 that have been pulled out are connected to the hydraulic cylinder 1.
5 and other hydraulic cylinders (not shown), the respective pin insertion tubes 12a, 12'b, 40a, 40b, 4
1a and 41b. Subsequently, all the shield jacks 18 expand by an equal amount and the tunnel wall 26
When the front end surface 26a of the excavator 1 is pressed, the excavator l moves straight and excavates the tunnel. Note that when at least three bent pins are inserted, the connection rigidity of the shell 3 shown in FIG. 1 is increased, and the excavator 1 excavates the tunnel smoothly.

〔Effect of the invention〕

As described in detail above, the present invention provides a connecting member with a bent pin that connects two shells so that it can be freely inserted and removed, and a plurality of pairs of bent pins are arranged diagonally within the shell. It is possible to change the posture not only up and down and left and right, but also in directions in between. Therefore, when excavating tunnels with complex three-dimensional bends in large cities, etc., the shield tunneling machine can be easily bent in the desired bending direction, speeding up excavation preparations and speeding up excavation work. Efficiency can be achieved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the main parts of a shield tunneling machine to which the present invention is applied, Fig. 2 (a) is a front view of the bent pin, and Fig. 2 (b) is taken along the line n-n of Fig. 2 (a). 3 is a diagram of the shield tunneling machine in a bent state, FIG. 4 is a vertical sectional view of the shield tunneling machine, and FIG. 5 is a vertical sectional view of the shield tunneling machine in the mid-folded state. 1-Central folding type shield excavator, 3-・Body, 6-Connecting member, lO~13-・-Central folding pin. Patent applicant: Tokyo Electric Power Company, Inc. (and 1 other person) Agent: Patent attorney Katsutoshi Yoshimura (and 1 other person) Figure 2 (a) ■ Figure 2 (b)

Claims (2)

[Claims] (1) The connecting member of two longitudinally adjacent barrels is provided with a folding pin that can be freely inserted and removed to connect the two barrels in a freely foldable manner, and multiple pairs of folding pins are arranged diagonally within the barrel. A center-folding type shield excavator. (2) Among the plurality of pairs of center-folding pins that freely connect two longitudinally adjacent barrels, one pair of the center-folding pins connects the two barrels to advance the curve, while one of the pairs of center-folding pins A method of operating a center-folding type shield excavator, which is characterized by inserting three shields into both bodies and moving the machine in a straight line.