JPH0696941B2 - Underground excavator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground excavator equipped with an excavator which excavates a cross section applicable to a subway, a tunnel for roads, water and sewage, etc. and which rotates by a parallel link mechanism.

[0002]

2. Description of the Related Art A shield that excavates while applying pressure to a mixture obtained by adding a viscosity-imparting material (hereinafter referred to as mud soil material) such as clay or bentonite solution to ground soil and pressing the cutting face by the pressure. In this machine, pouring mud soil material is important for mudification of excavated soil, and in the case of a relatively large shield machine, in order to make mud formation faster and more uniformly, the mud soil material should be cut or cut into the ground. It is desirable to provide a plurality of inlets for injecting into the chamber and to provide the inlets from a position near the face, that is, immediately after the cutting blade provided on the cutter.

However, FIG. 4 shows Japanese Patent Application No. 1-261381.
1 shows an underground excavator 101 already proposed by the applicant of the present invention, and this underground excavator 101 has a rotating body 102 rotatable in a partition wall 113 by a drive device 112 provided at the rear. Is provided, this rotating body 1
A support shaft 103 having an excavating tool 104 is provided at an eccentric position of 02, and the excavating tool 104 rotates in a parallel link mechanism.

The mud-making earth material injection device of this underground excavator 101 has a mud-making earth material injection hole 105 formed inside a support shaft 103, and a swivel joint 106 provided at the rear end of the support shaft 103 at the rear side. The structure is connected to one end of the mud soil material injection pipe 107. Then, the other end of the mud soil material injection pipe 107 is connected to a swivel joint 108 provided on the rotating body 102. The swivel joint 108 is supported at a substantially central portion of a rear portion of the rotating body 102, and an injection pipe 109 is provided at the front and rear thereof, and a front portion of the injection tube 109 projects substantially at a central portion of a front portion of the rotating body 102. The provided mud soil material injection hole is connected to the mud soil material discharge hole / stirring bar 110. Further, in the above description, the mud soil material injection hole 105 in the support shaft 103 is the support shaft 103.
It is possible to eject from a portion near the face through the inside of the girder material 111 provided at the front end of the.

[0005]

However, in the case of a relatively large shield machine, in order to perform uniform injection into the excavation surface, a method of providing a large number of rotating bodies 102 of the drive unit or the beam member 1 is used.
A method of providing a large number of mud-making earth material injection holes 105 inside 11 to uniformly pour the mud-making earth material is conceivable.
It is uneconomical to increase the number of mud soil material injection holes 1
It is not preferable to provide a large number of 05 because the strength of the girder material 111 also decreases. In addition, the partition wall 11 other than the rotating body 102
The injection method from No. 3 has a problem that the injection range is small and a large number must be provided to achieve uniform injection, which is not preferable in terms of constitution and strength.

The present invention has been proposed in view of the above points, and an object of the present invention is to make a mud soil material uniform in an underground excavator equipped with an excavator that rotates in a parallel link mechanism. An object of the present invention is to provide an economical underground excavator equipped with a mud soil material injection device that can inject and make mud faster.

[0007]

In order to achieve the above object, an underground excavator according to the present invention has an excavator B which rotates in a parallel link mechanism, and an excavator behind this excavator B. It is rotatable by a drive device to rotate B, and
In an underground excavator provided with a rotating body 5a equipped with a mud soil material injection device, a support shaft 15 (15
The rotary body 5b (5B) provided with a mud soil material injection device different from the mud soil material injection device via a) is provided.

[0008]

In the present invention, in addition to the rotating body 5a which is rotatable by the driving device itself for rotating the excavator B and has the mud-making earth material injecting device, the mud-making earth material is injected at any position. Rotating body 5b having a device and no driving device
Since (5B) is provided, the mud-grinding material injection device for the rotating body 5b (5B) enables pouring mud-grinding material into a suitable portion for cutting the soil, thereby easily and quickly converting the mud into the mud. I am able to do that.

Further, the support shaft 15 of the rotating body 5b (5B)
(15a) also supports the girder material 24 constituting the excavator B, which is also advantageous in terms of strength.

[0010]

First Embodiment The present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing the internal structure of an underground excavator equipped with a mud soil material injection device, FIG. 2 is a front view, and as shown in FIG. 2, it is applied to a mud pressure shield whose excavation section has a substantially rectangular shape. An example in the case of doing is shown. In FIG. 1, 1 is an underground excavator, 2 is a substantially rectangular shield cylinder which is a component of the underground excavator 1, a hood 3 is formed in front thereof, and a face chamber A is formed in the front. In order to do so, it is partitioned by the partition wall 4.

However, as is apparent from FIG. 2, the slightly disk-like substantially disk-shaped rotating body 5a, which is itself rotatable by the driving device and constitutes one of the constituent members of the mud-making earth material injection device, For example, three rotors 5b are arranged side by side at good intervals, two on both sides of the lower side, and three rotors 5b having no drive device in the central portion are provided on the upper rotors 5a. , The rotors 5a, 5 are arranged side by side in a substantially downward position, for example.
b also forms a component member of a mud-soil material injection device different from the above,
It is rotatably provided in front of the partition wall 4.

That is, in FIG. 1, reference numeral 6 denotes a drive motor, which is a component of the above-mentioned drive device, and is attached to a frame 7 provided on the rear side of the partition wall 4 with a space therebetween, and is attached to a rotation shaft thereof. A gear 8 is provided, and a reduction gear 9 is meshed with the gear 8.

The reduction gear 9 is a cylindrical shaft 10
The shaft 10 is connected to the rear end side and is rotatably supported on the partition wall 4 by a seal and bearing 11. The rotary body 5a is provided at the front end portion of the shaft 10. The rotating body 5a is located on the front side of the partition wall 4.

Further, the rotating body 5 having no drive device at the rear portion.
Reference numeral b denotes a hollow short cylinder, which is located between the partition wall 4 and a frame 7 provided behind the partition wall 4, and is provided on the outer peripheral side of the bearing 12 and on the rear side of the bearing 13.
Support member 1 provided between partition wall 4 and frame 7 by
It is rotatably supported with respect to the frame 4, the frame 7, and the like.

In this case, the front surface of the rotating body 5b is substantially flush with the front surface of the partition wall 4. Further, a support shaft 15 is penetrated through the front portion of the rotating body 5b at a position deviated from the center thereof, and the supporting shaft 15 is rotatably supported by the bearing 16 with respect to the rotating body 5b, and also the rotating body 5b. A seal 17 is provided on the front portion of the rotary body 5b and projects forward from the front surface of the rotating body 5b.

A mud-making earth material injection hole 18 extending along the axial direction is bored inside the support shaft 15, and a swivel joint provided at the rear end of the support shaft 15 behind the mud-making earth material injection hole 18. It is connected via 19 to one end of the mud soil material injection pipe 20. The other end of the mud-making earth material injection pipe 20 is connected to a swivel joint 21 provided on the rotating body 5b. This swivel joint 21 is a rotating body 5.
It is supported at a substantially central portion of the rear part of b.

Further, in front of and behind the swivel joint 21, there are provided mud-making earth material injection pipes 22 extending substantially straightly, and in front of the mud-making earth material injection pipes 22, approximately the central portion of the front part of the rotating body 5b. And is located in the face chamber A, and is connected to the mud-making earth material discharge hole / stirring bar 23 having the mud-making earth material injection hole formed therein. A stirring rod 23a is provided at a good position on the front part of the rotating body 5b. Further, a girder material 24 which is a constituent member of the excavator B is provided in front of the muddy earth material injection hole 18 of the support shaft 15, and the muddy earth material injection hole 18 is linearly formed inside the girder material 24. It is open.

In this way, on the rotor 5b side, the mud-making earth material injection hole 1 communicating with the mud-making earth material injection hole 18 of the girder material 24 is formed.
Rotatable support shaft 15 having 8 inside, swivel joint 19 provided behind it, mud soil material injection pipe 2
0, swivel joint 21 connected to this, mud soil material injection pipe 22 penetrating this swivel joint 21,
The front side of the rotating body 5b protrudes forward from a substantially central portion, and the beam member 2
4 is composed of a mud-making earth material discharge hole / stirring bar 23 and the like, the tip of which is provided immediately behind the cutting blade 23 and the inside of which is provided with a mud-making earth material injection hole communicating with the mud-making earth material injection pipe 20. A mud soil material injection device is provided.

A rod-shaped support shaft 25 is provided in the front portion of the rotating body 5a at a position deviated from the center thereof and on the outer peripheral portion of the rotating body 5a.
Is connected to the girder member 24 in the same manner as. Also, the rotating body 5a
A mud-making earth material discharge hole / stirring bar 26 is projectingly provided in the front portion of the above and at an opposite position on the opposite side of the support shaft 25.

On the side of the rotating body 5, however, the girder material 24,
A mud-making earth material injection hole 27 is provided inside the support shaft 25, the rotating body 5a, the mud-making earth material discharge hole / stirring rod 26, the shaft 10, the gear 9 and the like connected thereto, and the mud-making earth material is provided behind the gear 9. A mud soil material injection device including a swivel joint 28 and the like connected to the injection hole 27 is provided.

In addition, reference numeral 29 in the drawing denotes an earth discharging device such as a screw conveyor, the front end of which is connected to a substantially central portion below the partition wall 4, and the mud excavated soil in the face chamber A is exposed to the outside by excavation. It is designed to be discharged. Further, 30 is a shield jack for excavation of the underground excavator 1, the front end is on the frame 7 side, the rear end is a reaction force receiving side segment, etc. (not shown).
Is located in.

The girder member 24 has a rectangular shape when viewed from the front (not shown), and is provided with a large number of cutting blades 31 at its front portion, and is connected to the eccentric support shaft 25 of the rotating body 5a so as to be parallel. The excavator B that rotates in a link mechanism is configured. In this case, the girder member 24 has a square shape when viewed from the front, but it may be a rectangular face plate shape.

Next, the operation of the present invention will be described. The rotating device 5a, which is the main part of the drive mechanism of the excavator B having a parallel link mechanism-like movement, is rotated by the drive device, and this movement is transmitted to the excavator B via the support shaft 25 and moved. Here, the cutting body 5a of the drive unit and the rotary unit 5b other than the drive unit are uniformly injected into the ground from a position close to the cutting by a mud-making earth material injection device or the like, and are attached to the front surface of the excavator B. The ground is cut by the blade 31.

The cut earth and sand are taken into the face chamber A, filled with it, and sufficiently mixed with the injected mud-making earth material by the discharge hole and the stirring rod 26 of the mud-making earth material to make it impermeable to the earth and sand. And a plastic fluidity, the inside of the face chamber A is pressurized by the jack 30 for propulsion, and a certain pressure is controlled by an earth pressure gauge (not shown) provided at a good position, and the earth discharging device 29
To excavate while discharging an appropriate amount of soil.

In this case, in addition to the device for injecting the mud-making earth material of the appropriate number of rotating bodies 5a, which is provided with a drive device at the rear part, which is rotated by the parallel link mechanism via the support shaft 25, a drive device is provided at the rear part. The mud-making earth material pouring device of the rotating body 5b that does not have and has the excavator B that rotates by the parallel link mechanism and that rotates via the support shaft 15 can be provided at any position, and the cutting blade 31 Immediately after, the mud soil material can be injected, and mud formation can be performed quickly and uniformly.

Further, since the support shaft 15 bears a part of the load (earth pressure, water pressure, etc.) acting on the excavator B, the cross section of the excavator B can be reduced.

[0027]

Second Embodiment FIG. 3 shows a second embodiment of the present invention. This example is characterized in that the rotating body 5B in the central portion is of a type different from that of the first embodiment.

That is, the rotating body 5B is provided in front of the partition wall 4, the rear part thereof is supported by the shaft 10a rotatably supported by the partition wall 4, and the swivel joint 21a is provided behind the shaft 10a. On the other hand, a mud soil material injection pipe 22a is provided, and a mud soil material injection hole 18a is provided in the shaft 10a and the rotating body 5B.

A support shaft 15a and a mud-making earth material discharge hole / stirring bar 23b are attached to the front surface of the rotating body 5B at positions deviated from the center thereof. Further, the girder member 24 is supported by a bearing 34 so that the rotational movement of the excavator B can be transmitted to the rotating body 5B via the support shaft 15a. Other configurations and operations are similar to those of the first embodiment.

[0030]

As described above, according to the present invention, in addition to the mud-making earth material injecting device for the rotating body 5a which is rotatable by the driving device itself, there is no driving device at the rear part, and the parallel link mechanism is used. The muddy earth material injection device for the rotating body 5b that rotates via the support shaft 15 to the rotating excavator B can be installed at any location, so the muddy earth material injection device is injected immediately after the cutting blade 31. If it is provided at the position, the mud-making soil material can be injected into that portion, so that the mud can be mud quickly and uniformly, and the workability is improved.

In addition, since a part of the load (earth pressure, water pressure, etc.) acting on the excavator B is supported by the support shaft 15,
Since the cross section of the excavator B can be made small, there is an effect that economic efficiency can be achieved.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment of the present invention.

FIG. 2 is a front view of a cross section taken along the line CC in FIG.

FIG. 3 is a side sectional view of a second embodiment of the present invention.

FIG. 4 is a prior example by the applicant.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Underground excavator 2 Shield cylinder 3 Hood 4 Partition 5a Rotating body 5b Rotating body 5B Rotating body 6 Drive motor 7 Frame 8 Reduction gear 9 Gear 10 Shaft 11 Seal and bearing 12 Bearing 13 Bearing 14 Supporting member 15 Supporting shaft 16 Bearing 17 Seal 18 Mud soil material injection hole 19 Swivel joint 20 Mud soil material injection pipe 21 Swivel joint 22 Mud soil material injection pipe 23 Mud soil material discharge hole and stirring rod 24 Girder material 25 Support shaft 26 Mud soil material discharge hole and stirring rod 27 Mud soil material injection hole 28 Swivel joint 29 Soil removal device 30 Shield jack for excavation 31 Cutting blade

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukihiro Kitamura 1-24-4 Shinkawa, Chuo-ku, Tokyo Within Daitoyo Construction Co., Ltd. (56) Reference JP-A-3-125795 (JP, A) JP-A 3-166494 (JP, A) JP-A-1-310091 (JP, A)

Claims (1)

[Claims] 1. An excavator B which rotates in a parallel link mechanism is provided. The excavator B is rotatable behind the excavator B by a drive device so as to rotate the excavator B. In an underground excavator provided with a rotating body 5a provided therein, a rotating body 5b provided with a mud making material injection device different from the mud making material injection device in the excavator B via a support shaft 15 (15a). (5B) is provided, The underground excavator characterized by the above-mentioned.