JPS6192295A - Shield 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 (Field of Industrial Application) The present invention relates to a large-diameter shielding machine used in constructing a tunnel or similar tunnel underground.

(Prior art) 1. An earth pressure type mechanical shield machine used for sanding tunnels mixes the excavated soil taken inside and the injected soil material for making mud such as Bentonai I. There is a type that suppresses the face.

In the shield method, the excavated soil is converted into mud by injecting mud material into the excavated soil and mixing it in the chamber of the shield machine. A kneading mechanism that mixes earth and sand with soil material is essential for turning excavated soil into mud.

Figure 4 shows a conventional example of this type of shield machine.
Mixing in the chamber 3°, which is divided by 3°, is usually carried out by means of a girder mixing blade 8° installed on the back of the 6° cutter spoke of the rotary excavator.

(Problems to be Solved by the Invention) In this case, since the kneading M8' is provided behind the cutter spoke 6°, the kneading member C rotates at the same speed as the rotational speed of the cutter spoke 6°.

By the way, in the current manufacturing technology of shield machines, due to the durability of the excavating tool, the rotational speed of the excavating tool is generally V-20 mm I It ~ 30 L'm in the tangential direction of the outer periphery! It is designed to be about II. For this reason, when the shield machine becomes humanized, H! at V
There was a disadvantage that the effectiveness of the song was worse than near the outer periphery, making it difficult to avoid converting the excavated soil into uniform mud.In addition, large diameter shields usually require a large number of 6 degree spokes. The boss B for attachment also became larger, the weight of the rotating part became heavier, and there were disadvantages such as the burden being placed on the motor.

(Object of the invention) The present invention was proposed in view of the above points, and its purpose is to enable a relatively large-diameter shield machine to excavate the ground with a small number of spokes, and to provide a method for excavating earth within the silt production area. To provide a shield machine capable of easily and quickly converting excavated earth and sand into mud across the outer and inner peripheral parts.

(Structure of the invention) Hereinafter, the present invention will be explained along with the drawings.

Figures 1 (A) and (0) show an embodiment of the present invention. In the figure, 1 is a cylindrical shield tube with a relatively large diameter, and there is a face in the front part of the shield tube 1 at the mouth. A partition wall 2 is provided to partition the side and the inside of the mine, and a chamber 3 is partitioned in the front part by the partition wall 2.

Reference numeral 4 denotes a center shaft which is provided approximately at the center in the axial direction of the shield cylinder 1 and is rotatable.Fishicotail-shaped center pins 1 to 5 are provided at the tip of the shaft, and a plurality of radially extending central pins 1 to 5 are provided at the tip of the shaft. A first cutter spoke 6 is provided, and the front part of the first cutter spoke 6 is provided with a large number of digging blades 7, and the rear part thereof has a ridge mixer W8 extending toward the rear. A central excavating tool 9 is configured. Since this central excavator 9 is for excavating the central part of the face, it is sufficient that the first cutter spoke 6 extends to the central part of the shield tube 1, and therefore, the boss B must also be large enough to withstand it. Good.

Further, 10 is a device 1llii r411 installed behind the central excavator 9, which not only excavates the outer periphery but also has the function of mixing soil and sand, and this device 10
At least one second cutter spoke extends radially from the vicinity of the center shaft 4 toward the outer periphery of the shield cylinder 1 and has a substantially round bar shape, and has an outer circumferential excavating blade 11A provided at the outer end. 11, and the second cutter spokes 11 are radially protruded at appropriate positions in the length direction, for example, in a cross shape, and are responsible for the functions of excavating and mixing the excavated earth and sand, and are provided with an excavating blade 12 at the tip. excavation member 1
3, a cap-shaped small gear 14 provided at the base end of the second cutter spoke 11, meshing with the cap-shaped small gear 14 substantially orthogonally, and fixed to the base end of the center shaft 40. The second cutter spoke 11 extends from the mine side to the face side by communicating with the cap-shaped large gear 15 and the ring-shaped hole 2a formed in the front □2 space v2 through a sealing material.
An intermediate support member 11 is rotatably inserted into the hole 17a and supports the cutter spoke 11 approximately in the vicinity of the intermediate portion, and an excavation blade 18 is provided at the tip of the intermediate support member 11 as necessary. There is□.

Therefore, the small #A1114 cap-shaped gear and the large gear 15 provided on the outer circumferential portion of the center shaft 4 are connected to a box-shaped cap-shaped gear storage portion 1 provided in the center and configured in a sealed manner.
It is located within 9. A center shirt I.4 is inserted through a sealing material 20 into the cap-shaped gear storage portion 19 of the opening. Further, the second cutter spokes 11 extend radially toward the diameter of the shield cylinder 1 via the sealing material 21 . Note that the cap-shaped gear storage portion 19 is provided between the first cutter spoke 6 having the kneading gear 8 and the partition wall 2.

Further, the intermediate support member 17 is configured to be rotatable by a drive motor 22 that can rotate in forward and reverse directions. That is, the drive motor 22 is fixed to a frame 23 appropriately provided on the side of the partition wall 2, and the drive motor 22 and the intermediate support member 11 are connected via a rotation transmission mechanism 24 having gears or the like. , the rotation of the drive motor 22 is transferred to the rotation transmitter M4.
24 to the intermediate support member 11, whereby the intermediate support member 17 rotates approximately concentrically with the rotatable center shaft 4, so that the second cutter spoke 11 rotates around the center shaft 4 to the intermediate support member 11. It is configured to rotate through the

On the other hand, the center shaft 4 is rotatably supported by support members 26, 27, etc. provided at the center of the partition wall 2 and the frame 25 behind it. In addition, a drive motor 28 capable of forward and reverse rotation is provided behind the frame 25, and a pinion 1ljll[29] provided on the motor shaft of the drive motor 28 is located between the partition wall 2 and the frame 25. , and meshes with a reduction gear 30 provided on the outer periphery of the center shaft 4, so that the center shaft 4 and, by extension, the central excavator 9 can rotate independently of the intermediate support member 11.

Historically, the rear end of the center shaft 4 is provided with a first swivel joint 32 connected to a mud material injection pipe 31, and inside the center shaft 4 is a tubular injection part 4a communicating with the first swivel joint 32. It extends along the axial direction, and opens at the tip as a mud material injection port 4b. In addition, as shown in FIG. 2 in detail, there is a center shaft in the cap-shaped gear storage portion 19, and a second shaft on the outer periphery of the shaft 4. Third swivel joints 1 to 33, 34 are provided, and are formed in the injection part 4a in the center shaft 4, the cap-shaped small gear 14, and the second cutter spoke 11 via these swivel joints 33, 34. The injection parts taa and iia are in communication with each other.

Then, the injection part 11a is opened at the appropriate position of the second cutter spoke 11.
is provided.

Reference numeral 35 denotes an exhaust 'a, W of a well-known configuration whose front end is provided in a manner that can communicate with the lower part of the chamber 3, and includes a cylindrical body 36 and a screw rotatably provided within this body 36. A conveyor 31 is provided.

Next, the present invention will be explained in detail.

For excavating the center of the face, use the central excavator 9 that protrudes slightly forward.
Also, the peripheral portion is performed via the peripheral general rule device 10. That is, when the drive motor 28 is driven, the center shaft 4 is driven through the pinion gear 29 and the reduction gear 30.
The rotation of the drive motor 28 is transmitted to the center shaft 4.
rotates, so that the central portion of the face is excavated by the central pit 1-5, the excavating blade 7, and the like.

In this case, since the cap-shaped canine medium 15 fixed to the center shaft 4 rotates, the cap-shaped pinion gear 14 that meshes with it substantially perpendicularly rotates, and the second cutter spoke 11 rotates around its axis tsn. Instead, it rotates and the excavating member 13/'f-
Rotate. At this time, by controlling the drive motor 28 to change the rotation speed of the pinter shaft 40, the rotation speed of the second cutter spoke 11 can also be changed.

Further, the driving motor 22 is driven, and the rotational force of the driving motor 22 is transmitted to the tip of the excavating blade 18 via the rotation transmission mechanism 24.
If the second cutter spoke 11 is rotated by transmitting the rotation to the intermediate support member 11 provided with the center shaft, the second cutter spoke 11 will rotate four times as much as the center shaft. Thereby, the outer periphery of the central excavating tool 9 can be excavated.

In this case, since the excavating blade 12 is attached to the second cutter spoke 11 in multiple shapes, the burden on each excavating blade 12 can be reduced. In addition, a digging blade 18 is provided at the tip of the intermediate support member 11.
By providing a cutter spoke 11 that rotates around the shaft in the diametrical direction of the shield cylinder 1, it is possible to excavate areas that cannot be excavated with the excavator blade 12.

A swivel joint 32 is provided at the rear end of the center shaft 4 and is connected to a sludge material injection pipe 31. If necessary depending on the condition of the ground, a swivel joint 32 can be used to inject liquid such as ben-L-nitrate solution. The soil material for cultivation is injected through the soil material injection pipe 31 and the swivel joint I/32. A part of the mud material passes through the injection part 4a in the center shirt l-4 and is injected into the center of the earth from the mud material injection port 4b at the tip. In addition, the soil material for cultivation is Swivelge' Yoindo S3,
34, etc., through the injection part 11a in the cutter spoke 11 of #42, and from the mud material injection port 111I to the surrounding area; one person can do so. In addition, there is clay in the ground,
Needless to say, if the soil contains a large amount of silt, there is no need to particularly inject soil material for cultivation.

Thus, the excavated soil and the soil for cultivation are efficiently mixed by a large number of excavating members 13 having a kneading function. In particular, the surrounding area can be mixed at the same time as excavation and converted into mud. As is well known, if the shield cylinder 1 is pushed forward by a propulsion means such as a shirt-V (not shown), 1 soil is generated.
This makes it possible to press down the face, and maintains suitable earth pressure for holding down the face as seals 1 to 1 and I move forward! Discharge the mud inside Non-Par 3! Blasphemy, 3! )
All you have to do is discharge the soil to the outside through the .

Figure 33 shows the other side of Ming in the book, and this V/
11! ! In this example, the force of the beam 12 is formed by the splinter spoke 11; the splintered excavation 81S material 13 is made up of a cutout screw 38 and the excavation blade 12 provided at the appropriate position on the outer periphery. ing. According to this embodiment, the excavated sand can be mixed while being moved in the axial direction (in other words, the length direction) of the second cutter spoke 11 by the rotation of the notched screw 380. There is an advantage in that it improves even more. Further, by setting the direction of the notched screw 38 appropriately, it is also possible to move the discharge 'A:' C toward the R3b.

In addition, in the above, it is also possible to use the ribbon screen 1- instead of the notch screen 38.

↓In addition, the present invention can also be applied to a mud water pressurization shield. In this case, it is sufficient to install an 11F mud pipe through the partition wall and through the hole in the screen. In the case of using a muddy silicon shield, the excavation part fJ1:t in the first embodiment functions as a jl shielder 5 together with the excavation blade 12.

History: The present invention consists of an open mechanical shield machine used for excavating a self-sustaining ground without water; Even if you use it, you will get tired.

(Effects of the Invention) As described above, according to the present invention, in the shield machine having a rotatable excavation tool for excavating a face, the carpet cutting tool includes:
A central excavator which is provided at the tip of the center shaft extending in the substantially axial direction of the shield tube and which excavates the central part of the face; A peripheral excavation device that excavates the peripheral portion by an excavating member provided on the cutter spoke, which rotates around the circumference and also rotates around an axis extending in the approximately diametrical direction of the shield cylinder, roars, and the cutter spoke Since it is possible to attach a large number of milling blades to the excavator, there is an advantage that the burden on the excavating blades is reduced.

It's home, in the case of Tonosho type shield, it is behind the conventional cutting tool.
i. The mixing stomach is located at the same position, and an effective mixing effect could not be obtained unless the excavated soil was taken into the upper mud preparation chamber. However, in the present invention, the excavation member rotates with the axis in the direction of shield straightening as a medium V. Therefore, there is an advantage that the excavated soil excavated by the excavating member can be immediately and effectively mixed by the member, and the number of spokes can be reduced.

[Brief explanation of the drawing]

Figure 1 (A), (Port 1 is an embodiment of the present invention, (A) is a side view, (B) is a partial side sectional view, Figures 2 (A), (B)
11 A partial sectional view of the surrounding sleep excavation project, (A) is a sectional view taken along the -Δ line into the figure (B), ¥S3 Figures (A) and (B) are other embodiments of the present invention, and Figure 4 is a conventional one. There is an example. 4...Center shaft, 9...Center translation only,
10... Surrounding drilling equipment, 13... Excavating Fill'
Part 1 (A) (B) 2nd (A) (B) -A '4-A Figure 3 (A) ] 1 (B)

Claims (1)

[Claims] In a shield machine having a rotatable excavating tool for excavating a face, the excavating tool is provided at the tip of a center shaft extending substantially in the axial direction of the shield tube, and includes a central excavating tool for excavating the central part of the face; An excavating member provided on a cutter spoke that is provided at the rear of the central excavating tool and rotates around the center shaft and also rotates around an axis extending approximately in the diametrical direction of the shield tube. A shield machine characterized by consisting of a peripheral excavation device for excavating a portion.