JP4347462B2 - Tunnel excavator body structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a main body structure of a tunnel excavator, and more particularly to a main body structure of a tunnel excavator in which a tunnel excavation type and a tunnel excavation diameter can be easily changed.
[0002]
[Prior art]
As a structure of the tunnel excavator, a so-called open type tunnel excavator, in which the airframe is exposed to the pit wall, is known. The open-type tunnel excavator includes a gripper that slides on a main beam, and changes the direction of the cutter head and changes the direction of excavation by swinging the rear end of the main beam up, down, left, and right. This type of tunnel excavator has the simplest structure where the entire body is exposed to the pit wall, but the front support such as the roof support and the side support so that it can handle soft ground, Some have an erector and shield jack. In addition, in order to make it possible to cope with weaker layer parts, the present applicant can bend the outer periphery of the cutter head at the front and rear cylinders while having a shape close to an open type excavator. Invented a tunnel excavator of a type that can be covered with the hood and made full-scale shield jack propulsion possible, and has been filed simultaneously with the present application. These airframes are manufactured with specifications according to each construction condition, but there are cases where parts are transferred from machines used in the past.
[0003]
[Problems to be solved by the invention]
These open-type tunnel excavators are easier to divert parts than double-shielded tunnel excavators, where the fuselage is completely covered with a shield. Although it can be said that it is relatively easy, the remodeling is still very large and requires a great deal of cost and time.
[0004]
The present invention has been made in order to solve the above-described conventional drawbacks, and the object of the present invention is to provide a tunnel excavator having a structure capable of easily manufacturing machines having different tunnel excavation types and tunnel excavation diameters. It is to provide a body structure.
[0005]
[Means and effects for solving the problems]
Accordingly, the main body structure of the tunnel excavator according to claim 1 includes a main beam 2 provided with a gripper device 6 slidably, and a cutter head support 3 provided on the front side of the main beam 2 and having a cutter head drive unit 29. The outer peripheral attachments 21 and 31 arranged on the outer peripheral portion of the cutter head support 3 such as a front support and a shield can be selectively exchanged according to the specifications, and the outer peripheral attachment By mounting the front support 31, it is possible to excavate a good ground such as a rock portion, and the shield 21 is provided with a shield jack on the inner peripheral surface instead of the front support as the outer peripheral attachment. It is characterized in that excavation of the weaker layer portion is possible by mounting .
[0006]
In the main body structure of the tunnel excavator according to claim 1, if the outer peripheral attachments 21 and 31 are selectively connected to the main beam 2 and the cutter head support 3 as basic components according to specifications, the tunnel excavator Tunnel excavators of different excavation types, for example, a general open type tunnel excavator, bend the outer periphery behind the cutter head with the front and rear trunks, while having a shape similar to the open type excavator described above. It can be easily and integrally covered, and can be easily remodeled to a type that enables full-scale shield jack propulsion, or can be easily changed to a type that has a front jack or shield jack or elector. In addition, if the cutter head 4 corresponding to the tunnel excavation diameter, the outer peripheral attachments 21 and 31, the gripper shoe 9 of the gripper device 6 and the like are selectively connected to the basic components, it corresponds to a plurality of tunnel excavation diameters. Can produce tunnel excavator. As described above, according to the first aspect of the present invention, it is possible to easily manufacture machines having different tunnel excavation types and tunnel excavation diameters and to change specifications between them.
[0007]
The main body structure of the tunnel excavator according to claim 2 is configured such that at least one of the cutter head 4, the outer peripheral attachments 21 and 31, and the gripper shoe 9 of the gripper device 6 having different specifications according to the tunnel excavation diameter depends on the tunnel excavation diameter. It is characterized by being selectively exchangeable .
[0008]
In the main body structure of the tunnel excavator according to the second aspect, a plurality of tunnel excavators having different tunnel excavation diameters can be easily manufactured. It is also possible to easily change specifications between a plurality of tunnel excavators having different tunnel excavation types and tunnel excavation diameters.
[0009]
The main body structure of the tunnel excavator according to claim 3 is characterized in that the outer peripheral attachments 21 and 31 are provided with frames 26 and 36 that can be connected to the outer peripheral portion of the cutter head support 3.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the tunnel excavator of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an exploded view of an open-type tunnel excavator 1. The tunnel excavator 1 includes a main beam 2 having a gripper device 6 slidably and a cutter head support provided at the front end of the main beam 2. 3 is a basic component.
[0012]
That is, in this tunnel excavator 1, the main beam 2 extends in the front-rear direction at the center, and the cutter head 4 is rotatably supported on the front portion of the main beam 2 via the cutter head support 3. Has been. A motor 29 as a drive unit for the cutter head 4 is disposed on the back surface of the cutter head support 3. Further, a gripper device 6 is provided at the rear portion of the main beam 2 so as to be slidable in the front-rear direction with respect to the cutter head support 3 via a thrust jack (not shown). As shown in FIG. 2, the gripper device 6 includes a gripper carrier 7, a gripper jack 8 attached to the gripper carrier 7, and a tip of the gripper jack 8 to be attached to the tunnel wall. The gripper shoe 9 is contacted and separated, and the torque jack 10 is used for correcting the tunnel excavator 1 during excavation by rotating the main beam 2 in the circumferential direction or swinging it up and down. In addition, 11 is a rear support, 12 is a girder.
[0013]
In addition, the cutter head support 3 is provided with a front support 31 as an outer peripheral attachment for the purpose of preventing skin fall of the pit wall and supporting the cutter head support 3 with respect to the tunnel pit wall. The front support 31 includes a roof support 33 that supports the upper surface of the pit wall, left and right side supports 34 that support the surfaces on both sides of the pit wall, and a vertical shoe 35 that supports the ground. The roof support 33 and the side support 34 can be brought into and out of contact with the pit wall by a jack 37 interposed between the frame 36 provided on the inner side. It is composed. The frame 36 is attached to the cutter head support 3. 4 is a cross-sectional view taken along the line AA in FIG.
[0014]
In the tunnel excavator 1 having such a configuration, when excavating a good ground such as a rock portion, a thrust jack is applied while pressing the gripper shoe 9 of the gripper device 6 against the ground and taking a reaction force against the gripper device 6. Thus, the propulsive force is transmitted to the cutter head support 3 and the cutter head 4 is rotated to perform excavation. Then, after excavation at a predetermined pitch, the front side support 34 is pressed against the tunnel wall, and the rear support 11 is extended to support the rear side of the main beam 2. Then, the pressing of the gripper device 6 is released, the gripper device 6 is moved forward with respect to the main beam 2 by the contraction of the thrust jack, and the excavation is continuously performed by repeating these operations.
[0015]
In the tunnel excavator 1 configured as described above, a gripper device 6 is provided when a tunnel excavator having a different tunnel excavation diameter is manufactured or when the specification is changed to a tunnel excavator having a different tunnel excavation diameter. The cutter head support 3 provided with the main beam 2 and the motor 29 for driving the cutter head 4 uses the above-described ones as they are, and other constituent members, that is, the cutter head 4 and the front support ( The front roof support 33, the front side support 34), and the gripper shoe 9 of the gripper device 6 are separately used with specifications corresponding to the excavation diameter. Therefore, it is possible to specify the main beam 2 and the cutter head support 3 having the same structure, and when manufacturing a tunnel excavator having a different tunnel excavation diameter, the manufacturing cost is significantly higher than the conventional one. Can be reduced. When the specification is changed to a tunnel excavator having a different tunnel excavation diameter, the parts other than the main beam 2, the cutter head support 3 and the gripper shoe 9 of the gripper device 6 can be used as they are. The cost and the duration of the modification can be reduced without requiring a special modification. Note that the gripper shoe 9 of the gripper device 6 may not be changed (replaced) in response to a change in excavation diameter.
[0016]
FIG. 6 shows an embodiment in which the present invention is applied to a tunnel excavator of a type that can be applied to a weaker layer, which was filed simultaneously with the present application by the present applicant. This excavator is the same as the conventional open type in that it has a main beam that is slidably provided with a gripper device, but the front and rear cylinders that can bend the outer periphery of the cutter head to each other. It is possible to carry out full-scale shield jack propulsion by having an erector and shield jack, and even in weak layers that can only be constructed by conventional double shield type tunnel excavators. Is possible. A change in the type between this type of tunnel excavator and a conventional general open type tunnel excavator will be described with reference to FIGS. For the main beam 2 provided with the gripper device 6 used in the open type tunnel excavator 1 and the cutter head support 3 provided with the motor 29 for driving the cutter head 4, a shield type shield 21 as an outer peripheral attachment. And a shield-type tunnel excavator 1 is configured using a predetermined cutter head 4.
[0017]
In the shield-type tunnel excavator 1 in this embodiment, the cylindrical shield 21 is divided into two in the front-rear direction, and includes a front trunk 22 and a rear trunk 23. The front cylinder 22 is provided so as to cover the outer periphery of the cutter head support 3, and a frame 26 is fixed to the inside of the front cylinder 22, and is attached to the cutter head support 3. A rear cylinder 23 is provided behind the front cylinder 22, and the rear cylinder 23 is formed slightly longer than the front cylinder 22. As shown in FIGS. 5 and 6, the front barrel 22 and the rear barrel 23 are connected to each other by an articulated jack 24, and a plurality of articulated jacks 24 are provided in the circumferential direction of the shield 21. Yes. 7 is a cross-sectional view taken along the line BB in FIG.
[0018]
A plurality of shield jacks 25 are disposed on the inner peripheral surface of the rear trunk 23, and these shield jacks 25 perform shield jack propulsion using segments (not shown) in the weak layer portion of the natural ground. Used when. Further, an erector 27 for constructing a segment on the tunnel wall is provided on the inner surface of the rear trunk 23 so as to be movable in the circumferential direction. Further, a tail seal 28 is provided at the rear part of the rear barrel 23.
[0019]
In such a shield-type tunnel excavator 1, for the weak ground where it is necessary to construct a segment, the gripper device 6 is completely shrunk to a non-use state, and the shield is assembled while the segment is assembled by the erector 27. The jack 25 is extended. Then, the shield 21 is advanced while the reaction force is obtained in this segment, and the cutter head 4 is rotated to dig.
[0020]
Here, when the shield jack 25 is propelled by the shield jack 25, the articulated jack 24 is bent between the front cylinder 22 and the rear cylinder 23 to change the direction of digging. Thus, since the front cylinder 22 and the rear cylinder 23 are bendable, the curve correspondence during excavation becomes very good.
[0021]
As described above, the main beam 2 and the cutter head support 3 which are the basic components are shared as a unit, and the shield part including the front cylinder and the rear cylinder is attached to the cutter head support 3 as one unit. It can be easily changed to a tunnel excavator with a different specification. Further, when the tunnel excavation diameter is changed, the main beam 2 and the cutter head support 3 are left as they are, and the tunnel excavation with different excavation diameters is performed only by changing (changing) the cutter head 4 and the shield attachment 21 having different diameters. The machine 1 can be easily modified. In addition, the cost and time required for remodeling can be reduced.
[0022]
When the tunnel excavator 1 of the type shown in FIG. 6 is changed to the conventional general open type tunnel excavator 1, the main beam 2 and the cutter head support 3 are used as they are, and the open type front excavator 1 is used. By using the support attachment 31 and the cutter head 4, it can be easily changed.
[0023]
As described above, in this embodiment, the main beam 2 provided with the gripper device 6 and the cutter head support 3 provided with the motor 29 for driving the cutter head 4 are used as basic constituent elements, so that the tunnel excavator having different specifications can be obtained. 1 can be easily changed, and the excavation diameter of the tunnel can be easily changed, and thereby the diversion property is remarkably improved.
[Brief description of the drawings]
FIG. 1 is an exploded configuration diagram showing a first embodiment when the present invention is applied to a general open tunnel excavator.
FIG. 2 is a cross-sectional view of the gripper device according to the first embodiment of the present invention.
FIG. 3 is a side view of the main part after assembling the constituent members according to the first embodiment of the present invention.
4 is a cross-sectional view taken along the line AA in FIG. 3 according to the first embodiment of the present invention.
FIG. 5 is an exploded configuration diagram showing a second embodiment when the present invention is applied to another type of tunnel excavator.
FIG. 6 is a side view of the main part after assembling the constituent members according to the second embodiment of the present invention.
7 is a cross-sectional view taken along line BB of FIG. 6 according to the second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tunnel excavator 2 Main beam 3 Cutter head support 4 Cutter head 6 Gripper device 9 Gripper shoe 21 Shield attachment (outer peripheral part attachment)
29 Motor (Cutter head drive unit)
31 Front support attachment (outer periphery attachment)

Claims (3)

A main beam (2) having a gripper device (6) slidably and a cutter head support (3) provided on the front side of the main beam (2) and having a cutter head drive unit (29). as an element, a front support, the outer peripheral portion attachment disposed on the outer periphery of the cutter head supported as shields, etc. (3) (21) (31), selectively interchangeable with and according to the specification, the outer peripheral portion By attaching the front support (31) as an attachment, excavation of good ground such as a rock mass is possible, and a shield jack is arranged on the inner peripheral surface instead of the front support as the outer peripheral attachment. by mounting the shield (21) which is, tunneling machine body structure, which is a possible drilling more Yowaso portion .   Select at least one of the cutter head (4), the outer periphery attachments (21) and (31), and the gripper shoes (9) of the gripper device (6) depending on the tunnel excavation diameter depending on the tunnel excavation diameter. The main body structure of a tunnel excavator according to claim 1, wherein the main body structure is replaceable. 2. The tunnel excavator according to claim 1, wherein the outer peripheral attachment (21) (31) includes a frame (26) (36) that can be connected to the outer peripheral portion of the cutter head support (3). Body structure.

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