JP2000064782A - Eccentric multi-spindle excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damage of a device due to displacement in the axial direction and the radial direction generated in a cutter frame and to synchronously rotate a cutter-piping rotary drum accurately with the cutter frame. SOLUTION: In the eccentric multi-spindle excavator, in which a cutter frame 2 eccentrically rotated by a specified radius is installed at the front section of a shield frame, a guide pipe 30 covering utility lines L to the various equipments of the cutter frame 2 is mounted between the shield frame and the cutter frame 2 so as to be made to follow up to the eccentric revolution of the cutter frame 2 and be revolved and a cutter-piping rotary drum 22 making the guide pipe 30 follow up to the shield frame 1 side of the guide pipe 30 and eccentrically rotating the guide pipe 30 is set up, the cutter-piping rotary drum 22 is connected to a cutter driving section 32 turning the cutter frame 2 through a synchronous turning device 36 and driven.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eccentric multi-axis excavator capable of excavating and constructing tunnels of any cross-sectional shape.

[0002]

2. Description of the Related Art In conventional tunnel excavators, as a general rule, only tunnels of circular cross section that are wasteful in height and width directions can be excavated. When constructing, it was often difficult to effectively use the excavation itself or its underground space.

For this reason, recently, a new excavation method called a so-called arbitrary cross-section excavation method and an eccentric multi-axis excavator for realizing the method have been proposed. It enables the efficient excavation and construction of tunnels with an arbitrary cross-sectional shape in the underground space, and its application is actually planned.

As shown in FIGS. 3 and 4, this eccentric multi-axis excavator is provided with a small cutter frame 2 similar to the shield frame 1 on the front surface of a shield frame 1 having a rectangular cross section, for example. , This cutter frame 2
The cutter supporting beam 3 is eccentric to the cutter driving shaft 5 via the rotor 4 and is connected in a crank shape. The rotor 4 is rotated about the cutter driving shaft 5 to
As shown in (a) to (d), the cutter frame 2 is eccentrically rotated in the radial direction of the shield frame 1 at a predetermined radius to excavate a tunnel having a cross-sectional shape substantially similar to the shield frame 1 (rectangular shape). -It was constructed.

Therefore, by using the cutter frame 2 having a shape similar to the cross-sectional shape of the shield frame 1 of this eccentric multi-axis excavator, in addition to the above-mentioned rectangular cross-section, for example, an elliptical cross-section or an arc-shaped rectangle. It is possible to easily excavate and construct tunnels of any cross-sectional shape, such as cross-sections, horseshoe-shaped cross sections, and circular cross sections with protrusions.

The eccentric multi-axis excavator is capable of excavating and constructing a tunnel having an arbitrary cross-sectional shape, and all the cutter bits 6 provided on the cutter frame 2 draw independent and identical circular loci. Since each cutter bit 6 wears evenly due to turning to each
Since it has the advantage that the rotation torque can be reduced because the rotation radius is small, it can be applied to a shield frame having a circular cross section similar to the conventional one as shown in FIG.

3 and 4, 7 is a bulkhead for partitioning the front end of the shield frame 1, 8 is a cutter drive motor for driving each cutter drive shaft 5, 9 is a screw conveyor for taking out excavated earth and sand, 10 Is an erector for assembling the segment s.

[0008]

The cutter frame 2 of the above-described eccentric multi-axis excavator is, for example, a copy cutter 2 provided on the cutter frame 2 as shown in FIG.
Various hydraulic cylinders 16 for retracting the a and 2a, a chemical liquid inlet 17, and sensors (not shown) such as an earth pressure gauge are attached. Then, utility lines L such as hydraulic pipes, electric cables, and chemical injection pipes connected to these
8 passes through the inside of the guide pipe 11 spanned between the cutter frame 2 and the bulkhead 7 and is extended from the inside of the shield frame 1. That is, as shown in FIGS. 8 to 10, the guide pipe 11 has an end portion connected to the cutter frame 2 side via a bearing 12, and the other end portion rotatably supported by the shield frame 1. The pipe pipe is connected to the pipe rotating drum 13 at a position eccentric from the axial center of the pipe drum, and the guide pipe 11 and the cutter pipe rotating drum 13 follow the movement of the cutter frame 2 and are connected to each other. By rotating synchronously with the cutter frame 2 about the shaft center portion, the utility line L is protected and extended to the cutter frame 2 side.

However, this guide pipe 11 is
Since the ends thereof are connected to the cutter frame 2 and the cutter pipe rotary drum 13 side directly or via the bearing 12, respectively, as shown in FIG. 10, earth pressure applied to the cutter frame 2 is passed through the guide pipe 11. It may be directly transmitted to the cutter pipe rotary drum 13 side. As a result, the rotation resistance of the cutter piping rotary drum 13 increases, so that the bearing 14 on the cutter piping rotary drum 13 side increases.
Inconveniences such as damage to the cutter pipe rotary drum 13 and the like can be considered.

When the cutter frame 2 is displaced in the radial direction due to excavation resistance of the cutter frame 2 during operation,
The displacement is directly transmitted to the guide pipe 11 and an unreasonable load is applied to the guide pipe 11.
There is also a possibility that 1 may be damaged.

Therefore, the present invention has been devised in order to effectively solve such a problem, and an object thereof is to prevent damage to the device due to axial and radial displacement occurring in the cutter frame. The present invention provides a novel eccentric multi-axis excavator capable of accurately rotating a cutter pipe rotary drum in synchronization with a cutter frame.

[0012]

In order to solve the above-mentioned problems, the present invention provides a cutter frame, which is eccentrically rotated at a predetermined radius, at the front part of the shield frame, and between the shield frame and the cutter frame. A guide pipe that covers the utility line of the cutter frame to various equipment is installed so as to rotate following the eccentric rotation of the cutter frame,
In an eccentric multi-axis excavator provided with a cutter pipe rotating drum that eccentrically rotates by following the guide pipe on the shield frame side of the guide pipe, the cutter pipe rotating drum is used as a cutter driving unit that rotates the cutter frame. It is designed to be connected and driven via a synchronous rotation device.

According to this, since the cutter pipe rotating drum can be directly rotated by the cutter driving section by the synchronous rotating device without using the cutter frame as in the conventional case, the guide pipe has the conventional rigidity. You don't have to have one. Therefore, the earth pressure applied to the cutter frame can be released by the guide pipe, and the earth pressure can be prevented from being directly transmitted to the cutter pipe rotating drum side, and the axial and radial displacement generated in the cutter frame can be prevented. The device can be prevented from being damaged and the cutter pipe rotating drum can be rotated accurately. Further, since the synchronous rotation device is provided inside the shield frame, not on the excavated earth and sand side, the maintenance can be easily performed.

It is preferable that the guide pipe has a tip end rotatably supported by the cutter frame and a back end rotatably supported by the cutter pipe rotary drum.

According to this, the guide pipe is provided between the cutter frame which rotates eccentrically and the cutter pipe rotary drum,
It is possible to follow eccentric rotation smoothly without twisting.

Further, it is preferable that the synchronous rotation device comprises an intermediate gear mechanism for connecting a rotary drum gear provided on the cutter pipe rotary drum and a drive gear provided on the cutter drive unit.

Further, it is preferable that the intermediate gear mechanism has a synchronous gear mechanism for synchronizing the rotation of the cutter frame and the rotation of the cutter pipe rotary drum.

The intermediate gear mechanism is connected to the first rotating gear connected to the drive gear of the cutter drive section, and to the rotating drum gear of the cutter pipe rotating drum which is arranged coaxially with the first rotating gear. It is preferable that the first rotary gear and the second rotary gear have a gear ratio set so that the cutter frame and the cutter pipe rotary drum rotate in synchronization with each other.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment for carrying out the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view showing an embodiment of a so-called shield excavator of the multi-axis eccentric excavator according to the present invention, and FIG. 2 is an enlarged view of a portion A of FIG. is there. In the figure, 2 is the above-mentioned cutter frame, 7 is a bulkhead located in parallel with the cutter frame 2 and provided on the front surface of the shield frame 1, and 15 is a cutter chamber formed between the cutter frame 2 and the bulkhead 7. is there.

As shown in the figure, the bulkhead 7 is integrally provided with an external support cylinder 20 extending in the axial direction, and a cutter pipe rotary drum 22 is provided on the inner peripheral surface thereof via an external thrust bearing 23 and the like. Is rotatably supported. The cutter frame 2 side of the cutter pipe rotary drum 22 is closed by a closing plate 21. Further, a flange 24 protruding outward in the radial direction is formed on the closing plate 21 of the cutter pipe rotary drum 22, and the cutter pipe rotary drum 22 is regulated so as not to drop from the external support cylinder 20 into the bulkhead 7. ing. Further, a seal member 25 is provided on the peripheral edge of the cutter piping rotary drum 22 on the cutter frame 2 side so that earth and sand on the cutter chamber 15 side does not enter the gap between the cutter piping rotary drum 22 and the external support cylinder 20. It is sealed like this.

An eccentric pipe 26 having both ends opened is provided in the outer support cylinder 20 of the cutter pipe rotary drum 22 so as to penetrate the closing plate 21. The eccentric pipe 26 is rotatably supported by an internal thrust bearing 28 and the like in an internal support cylinder 27 fixed at a position deviated from the rotation axis X of the external support cylinder 20. The rotation axis Y is eccentric to the rotation axis X of the external support cylinder 20. In the figure, 29 is a rib for supporting the inner support cylinder 27 from the outer support cylinder 20.

On the other hand, on the cutter frame 2 side, a guide pipe 30 extending to the bulkhead 7 side is provided.
The guide pipe 30 is rotatably connected so that its end portion on the side of the cutter frame 2 communicates with the inside of the cutter frame 2, and the other end of the guide pipe 30 traverses the cutter chamber 15 obliquely downward and the cutter pipe rotary drum. 22 is extended to the side of the eccentric pipe 26 and is rotatably connected to each other so that they can communicate with each other.

As shown in FIG. 2, the guide pipe 30 and the eccentric pipe 26 are connected by a seal member 31 described later, and are structurally cut off at the edges. According to this, the guide pipe 30 can smoothly follow the eccentric rotation without being twisted between the cutter frame 2 and the cutter pipe rotating drum 22 that rotate eccentrically.
Some deviation in the axial direction of the guide pipe 30 will be allowed.

On the side of the cutter pipe rotary drum 22 at the joint between the guide pipe 30 and the cutter pipe rotary drum 22, there is provided a convex ring 43 whose inner side in the radial direction is projected forward in a tapered shape. A concave ring 44 is provided on the guide pipe 30 side so as to face the convex ring 43, and the inner side in the radial direction is tapered forward. The concave ring 44 has a seal member 3 that extends to the convex ring 43 and divides the cutter chamber 15 from the inside of the guide pipe 30.
1 is provided. The seal member 31 is a convex ring 43.
Has a length longer than the distance between the concave ring 44 and the concave ring 44, and its end portion is in contact with the tapered portion 45 of the convex ring and is folded back radially outward. This seal member 3
By sliding 1, the guide pipe 30 is rotatably connected to the side of the eccentric pipe 26, and the radial displacement of the guide pipe 30 is allowed to some extent. Then, the deviation is returned by the elastic force of the seal member 31.

A protrusion 46 extending toward the convex ring 43 is formed on the outer peripheral side of the concave ring 43. When the guide pipe 30 is displaced in the radial direction, the protrusion 4 is formed.
6 is in contact with the convex ring 43 to prevent the guide pipe 30 from coming off the cutter pipe rotary drum 22. A detachment prevention ring 47 extending inward in the radial direction of the convex ring 43 may be provided inside the guide pipe 30, as indicated by a broken line in the figure.

With the above structure, the utility line L such as hydraulic pipes and control cables extending from the bulkhead 7 side is partitioned from the excavated earth and sand side, passes through the eccentric pipe 26 through the guide pipe 30, and enters the cutter frame 2. It is supposed to be stretched.

At the rear end of the cutter pipe rotary drum 22, a rotary drum gear 35 for rotating the cutter pipe rotary drum 22 is provided along the circumferential direction thereof.

Similar to the conventional eccentric multi-axis excavator shown in FIG. 8, inside the shield frame 1, above and below the cutter pipe rotary drum 22, a cutter drive for eccentrically rotating the cutter frame 2 is provided. Each section 32 is provided. The cutter driving unit 32 includes a cutter driving shaft 5 and a cutter driving motor 8 that drives the cutter driving shaft 5. The cutter drive shaft 5 is provided with a drive gear 34 that meshes with a motor gear 33 provided on the cutter drive motor 8.

As shown in FIG. 1, of the upper and lower drive gears 34, the upper drive gear 34 and the cutter pipe rotary drum 22.
A synchronous rotation device 36 for rotating the cutter pipe rotary drum 22 in synchronism with the cutter frame 2 is interposed between the rotary drum gear 35 and the rotary drum gear 35.

The synchronous rotation device 36 includes a rotary drum gear 35.
And a drive gear 34 are connected to each other. The intermediate gear mechanism 37 has a synchronous gear mechanism 38 for synchronizing the rotation of the cutter frame 2 and the rotation of the cutter pipe rotary drum 22.

Specifically, the intermediate gear mechanism 37 is connected to the drive gear 34 of the cutter drive unit 32, and the first rotary gear 3 is connected to the drive gear 34.
9 and a second rotary gear 40 arranged on the same rotary shaft 41 as the first rotary gear 39 and connected to the rotary drum gear 35 of the cutter pipe rotary drum 22. Rotating shaft 4
1 is provided in parallel with the cutter drive shaft 5. The gear ratio between the first rotary gear 39 and the second rotary gear 40 is set so that the cutter frame 2 and the cutter pipe rotary drum 22 rotate in synchronization with each other.

That is, by the rotation of the drive gear 34,
The first rotary gear 39 rotates in the reverse direction, and the second rotary gear 40 rotates in the same direction. The rotation of the second rotary gear 40 causes the rotary drum gear 35 to rotate in the same direction as the drive gear 34. The cutter ratio and the cutter pipe rotary drum 22 are synchronously rotated in the same direction by the above gear ratio.

Next, the operation of the present invention will be described.

The cutter frame 2 located in front of the bulkhead 7 is eccentrically rotated with a predetermined radius by the cutter driving unit 32. At the same time, the intermediate gear mechanism 37 is rotated by the rotation of the drive gear 34 of the cutter drive unit 32, and the cutter pipe rotary drum 22 rotates in synchronization with the eccentric rotation of the cutter frame 2. By this rotation, the eccentric pipe 26, which is eccentrically supported from the rotation axis X in the cutter piping rotary drum 22, rotates eccentrically following the eccentric rotation of the cutter frame 2.

As a result, the utility line L extending from the inside of the bulkhead 7 when the cutter frame 2 is eccentrically rotated is favorably extended into the cutter frame 2 without being adversely affected by unreasonable stress or soil in the cutter chamber 15. Will be done.

Thus, by the synchronous rotation device 36,
Since the cutter pipe rotary drum 22 is rotated directly from the cutter drive unit 32, the cutter frame 2 does not have to be interposed to rotate the cutter pipe rotary drum 22 as in the conventional case. Therefore, the guide pipe 30 that connects the cutter frame 2 and the cutter pipe rotary drum 22 side
Since it does not need to be as strong as the conventional guide pipe 11, it can be formed relatively flexibly, so the earth pressure applied to the cutter frame 2 can be released by the guide pipe 30, and the earth pressure can be directly rotated by the cutter pipe. It will not be transmitted to the drum 22 side. Furthermore, the guide pipe 30
The eccentric pipe 26 and the eccentric pipe 26 are connected by a seal member 31 and are structurally cut off at the edges, so that the cutter pipe rotary drum 22 that reliably receives earth pressure even when the earth pressure is large.
The transmission to the side can be prevented. As a result, it is possible to prevent damage to the bearing 14 on the cutter pipe rotary drum 13 side and the cutter pipe rotary drum 22 itself.

Further, even when the cutter frame 2 is displaced in the radial direction due to excavation resistance of the cutter frame 2 during operation, since the guide pipe 30 is formed relatively flexibly, the displacement is caused by the cutter pipe. It can be released without being transmitted to the rotary drum 22. This can prevent damage to the guide pipe 30 itself.

Further, since the synchronous rotation device 36 is composed of the intermediate gear mechanism 37 provided inside the shield frame 2 rather than on the excavated earth and sand side, the shield frame 2 can be used for maintenance such as repair and inspection at the time of malfunction. Can be easily done from inside.

In the present embodiment, the case of the shield excavator has been described. However, a so-called TBM (tunnel boring machine) without a cylindrical shield frame or a complete tunnel, not only a ground surface, is ditched. It is needless to say that the same can be applied to an excavator when excavating in a shape.

[0041]

In summary, according to the present invention, the axial displacement and the radial displacement of the cutter frame due to the cutter frame, applied earth pressure, excavation resistance, etc. can be released by the guide pipe. Therefore, the stress due to the displacement of the cutter frame is not directly transmitted to the cutter pipe rotating drum side, and it is possible to effectively avoid adverse effects on the rotating body main body, the bearing portion thereof, the bulkhead that pivotally supports the rotating body, and the like. As a result, the device can be prevented from being damaged, and the cutter pipe rotating drum can be accurately rotated in synchronization with the cutter frame.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of part A in FIG.

FIG. 3 is a front view showing an example of a conventional eccentric multi-axis excavator.

FIG. 4 is a side view showing an example of a conventional eccentric multi-axis excavator.

FIG. 5 is an explanatory view showing an operation example of a conventional eccentric multi-axis excavator.

FIG. 6 is a front view showing an example of a conventional eccentric multi-axis excavator.

FIG. 7 is a front view showing an operation example of the conventional eccentric multi-axis excavator shown in FIG. 7.

FIG. 8 is a side view showing an arrangement state of a utility line of a conventional eccentric multi-axis excavator.

FIG. 9 is a perspective view showing an operating state of a guide pipe of a conventional utility line.

FIG. 10 is a cross-sectional view showing an installed state of a conventional utility line guide pipe.

[Explanation of symbols]

1 shield frame 2 cutter frame 22 Cutter piping rotary drum 30 guide pipe 32 cutter drive 34 drive gear 35 rotating drum gear 36 Synchronous rotation device 37 Intermediate gear mechanism 38 Synchronous gear mechanism 39 First rotating gear 40 Second rotating gear L Utility line

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masayuki Araike             11-11 Kitahamacho, Chita City, Aichi Prefecture Ishikawajima Harima             Heavy industry Aichi factory (72) Inventor Katsumi Kadota             11-11 Kitahamacho, Chita City, Aichi Prefecture Ishikawajima Harima             Heavy industry Aichi factory (72) Inventor Toshiaki Okubo             11-11 Kitahamacho, Chita City, Aichi Prefecture Ishikawajima Harima             Heavy industry Aichi factory (72) Inventor Shigekazu Ishii             11-11 Kitahamacho, Chita City, Aichi Prefecture Ishikawajima Harima             Heavy industry Aichi factory F-term (reference) 2D054 AB01 AB05 AB07 BA10 BB09

Claims (5)

[Claims] 1. A cutter frame, which is eccentrically rotated with a predetermined radius, is provided at a front portion of a shield frame, and a guide pipe is provided between the shield frame and the cutter frame to cover a utility line of the cutter frame to various devices. An eccentric multi-axis excavator provided with a cutter pipe rotating drum which is provided so as to rotate following the eccentric rotation of the frame and which causes the guide pipe to follow the eccentric rotation on the shield frame side of the guide pipe. An eccentric multi-axis excavator, characterized in that a pipe rotating drum is connected to a cutter driving unit for rotating the cutter frame via a synchronous rotation device and driven. 2. The eccentric multi-axis excavator according to claim 1, wherein the guide pipe has a front end rotatably supported by the cutter frame and a rear end rotatably supported by the cutter pipe rotary drum. 3. The bias according to claim 1, wherein the synchronous rotation device comprises an intermediate gear mechanism that connects a rotary drum gear provided on the cutter pipe rotary drum and a drive gear provided on the cutter drive unit. A core multi-axis excavator. 4. The eccentric multi-axis excavator according to claim 3, wherein the intermediate gear mechanism has a synchronous gear mechanism for synchronizing the rotation of the cutter frame and the rotation of the cutter pipe rotary drum. 5. The intermediate gear mechanism is connected to a first rotary gear connected to a drive gear of the cutter drive unit, and to a rotary drum gear of the cutter pipe rotary drum, which is arranged coaxially with the first rotary gear. 5. The second rotary gear according to claim 4, wherein the gear ratio between the first rotary gear and the second rotary gear is set so that the cutter frame and the cutter pipe rotary drum rotate in synchronization with each other. Eccentric multi-axis excavator.