JP4424202B2 - Shield machine - Google Patents

Description

  The present invention relates to a shield machine used for constructing a shield tunnel having a curved portion.

  A conventional shield machine will be described with reference to FIG.

  Here, FIG. 5 is a longitudinal sectional view of a conventional shield machine. In the drawings, “FF” indicates the forward direction, and “FR” indicates the backward direction.

  As shown in FIG. 5, the conventional X-fold type shield machine 101 includes a machine body 107 formed by connecting a cylindrical front cylinder 103 and a cylindrical rear cylinder 105 so that they can be bent. . Further, the rear end portion of the front cylinder 103 is superposed on the front end portion of the rear cylinder 105, and an inner flange 105 f is formed on the inner side surface near the front end portion of the rear cylinder 105.

  A ring-shaped erector support member 109 is rotatably provided inside the rear cylinder 105 via a plurality of guide rollers (not shown). A segment 111 is assembled on the excavation wall surface of the erector support member 109. An attached erector device 113 is provided. In addition, a plurality of shield jacks 115 that advance the excavator main body 107 (in other words, the entire shield excavator 101) in the circumferential direction are formed on the inner flange 105f of the rear barrel 105 by the reaction force from the assembled segments 111. They are arranged at intervals.

  Inside the excavator main body 107, a plurality of middle-folding jacks 117 for bending the front cylinder 103 with respect to the rear cylinder 105 with respect to the center C of the middle folding are disposed at intervals in the circumferential direction. Further, the front end portions of the plurality of middle-folded jacks 117 are respectively connected to a part of the front cylinder 103, and the rear end portions of the plurality of middle-folded jacks 117 are respectively connected to a part of the rear cylinder 105.

  A partition wall 121 that divides the cutter chamber 119 between the front face 103 and the face is integrally provided on the inner surface near the front end portion of the front barrel 103, and a support block 123 is integrally provided on the partition wall 121. The support block 123 is rotatably provided with a cutter head 125 for excavating natural ground. In other words, the front head 103 is provided with a cutter head 125 rotatably via the support block 123 and the partition wall 121. The cutter head 125 projects forward from the front body 103 and includes a number of cutter bits 127. A support frame 129 is integrally provided on the rear side surface of the partition wall 121, and a plurality of cutter motors 131 for rotating the cutter head 125 are arranged on the support frame 129 at intervals in the circumferential direction. Has been.

  Inside the excavator main body 107, there is provided a screw conveyor 133 that conveys excavated soil from the cutter chamber 119 in the backward direction. The excavated earth and sand conveyed by the screw conveyor 133 is conveyed to the ground by a belt conveyor (not shown) or the like.

  Accordingly, the cutter head 125 is rotated by driving the plurality of cutter motors 131. Then, while balancing the pressure of the excavated earth and sand in the cutter chamber 119 and the earth pressure of the face, the excavator main body 107 is advanced by the reaction force from the assembled segment 111 by the operation of the plurality of shield jacks 115, The ground is excavated by the cutter head 125 while stabilizing the face. In parallel with the excavation of the natural ground, the erector support member 109 is rotated to position the erector device 113 in the circumferential direction of the excavation wall surface, and the segment 111 is assembled on the excavation wall surface by the erector device 113 in a ring shape. wear. Further, the excavation of the natural ground and the assembly of the segments 111 as described above are continuously performed. As described above, a shield tunnel can be constructed.

  Here, during excavation of natural ground, the front barrel 103 is bent with respect to the rear barrel 105 with reference to the middle folding center C by appropriately adjusting the stroke amount of the plurality of middle folding jacks 117, and the shield excavation is performed. The excavation direction of the entire machine 101 can be changed, and a shield tunnel having a curved portion can be constructed.

In addition, there exist some which are shown to patent document 1, patent document 2, and patent document 3 as a prior art relevant to this invention.
JP 2002-309885 A Japanese Patent Laid-Open No. 10-331576 JP 2002-309885 A

  By the way, in the above-described shield machine 101, storage for storing hydraulic / electrical devices used for controlling actuators such as a plurality of shield jacks 115, a plurality of bent jacks 117, a plurality of cutter motors 131, and the like. The space S must be secured inside the excavator main body 107. Further, in addition to the plurality of shield jacks 115, a plurality of middle bent jacks 117 are disposed inside the excavator main body 107, and the rear trunk 105 is located more than the plurality of shield jacks 115 and the plurality of middle folded jacks 117. It is necessary to arrange the storage space S on the axial center side (or on the axial center side of the front barrel 103). Therefore, the cavity of the excavator main body 107 becomes narrow, and there is a problem that workability such as maintenance in the excavator main body 107 is lowered.

Feature of the present invention is one formed by a cylindrical front cylinder and tubular after body linked bendable, the front end of the rear cylinder is polymerized in the rear end of the front body, the rear An inner surface near the front end of the rear cylinder, having a convex rear curved surface outside the front end of the cylinder, a concave front curved surface in sliding contact with the rear curved surface inside the rear end of the front cylinder An inner flange is formed on the inner surface of the rear barrel, and a plurality of rear support pieces projecting inwardly in front of the inner flange on the inner side surface of the rear barrel are formed along the circumferential direction, and projecting inwardly toward the inner side of the front barrel. An excavator body in which a plurality of front support pieces are formed along the circumferential direction ;
An erector device which is provided inside the rear trunk and assembles a segment on the excavation wall ;
A plurality of shield jacks disposed on the inner flange of the rear trunk at intervals in the circumferential direction and for advancing the main body of the excavator by reaction force from the assembled segments ;
Arranged circumferentially at the inner side of the machine body, the front end is connected to the front support piece of the front cylinder, and the rear end is connected to the rear support piece of the rear cylinder. A plurality of middle-folded jacks that are connected to each other, and that bend the front torso with respect to the rear torso with reference to a center of bending that is a center of curvature of the rear curved surface of the rear torso ,
A cutter head provided rotatably on the front torso, protruding forward from the front torso, and excavating natural ground ;
The front is arranged at a distance inwardly in the circumferential direction of the cylinder, with each other comprises a, plurality of cutter motor for rotating the cutter head,
The rear curved surface of the rear cylinder and the front curved surface of the front cylinder are positioned between the inner flange of the rear cylinder and the rear support piece, and each of the middle folded jacks is centered on the middle folding center. The front end of each of the bent jacks is positioned forward of the rear side of the cutter motor, and the axis of each cutter motor is bent. the axial center of the jack is configured to stop at the axial center side of the front torso, the rear between the inner flange of the rear portion and the rear cylinder of the jack bending in each of the in the inside of the rear cylinder The storage space adjacent to the rear curved surface of the trunk is configured to be partitioned.

  According to a feature of the invention, the cutter head is rotated by driving a plurality of cutter motors. Then, by moving the main body of the excavator (in other words, the entire shield excavator) by the reaction force from the segments already assembled by the operation of the plurality of shield jacks, Drill a natural ground with the head. In parallel with excavation of natural ground, the segments are assembled to the excavation wall surface by the erector apparatus. Further, the excavation of the natural ground as described above and the assembly of the segments are continuously performed. As described above, a shield tunnel can be constructed.

Here, during excavation of natural ground, the front trunk is bent with respect to the rear trunk with respect to the center of the middle folding by appropriately adjusting the stroke amount of the plurality of middle folding jacks, and shield excavation is performed. The excavation direction of the entire machine can be changed, and the shield tunnel having a curved portion can be constructed. (General operation of the shield machine)
In addition to the general effects of the aforementioned shield machine, said shield machine is configured so that the entire jack bending in each of the is positioned in front of the center fold in the each of the inner side of the rear cylinder Since a storage space is defined between a rear end of the bent jack and the inner flange of the rear trunk, the plurality of shielded jacks and the plurality of bent jacks There is no need to arrange the storage space on the axial center side of the rear cylinder (or on the axial center side of the front cylinder).

  Further, the shield machine is configured such that a front end portion of each of the folded jacks is positioned forward of a rear end portion of the cutter motor, and an axis of each of the cutter motors Since it is configured so as to be closer to the axial center side of the front cylinder than the axial center, even if the storage space is partitioned between the rear end portion of the bent jack and the inner flange of the rear cylinder, An increase in the overall length of the excavator main body can be suppressed.

  As described above, according to the present invention, while suppressing an increase in the overall length of the excavator main body, the axial center side of the rear cylinder (or the shaft of the front cylinder) with respect to the plurality of shield jacks and the plurality of bent jacks. Since it is not necessary to arrange the storage space on the center side), the cavity of the excavator main body is expanded without reducing the control performance in the excavation direction of the shield excavator. Workability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4.

  Here, FIG. 1 is a longitudinal sectional view of a shield machine according to an embodiment of the present invention, FIG. 2 is a transverse sectional view taken along line II-II in FIG. 1, and FIG. FIG. 4 is a cross-sectional view taken along line III-III in FIG. 1, and FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. In the drawings, “FF” indicates the forward direction, and “FR” indicates the backward direction.

  As shown in FIG. 1 to FIG. 4, an X-fold type shield machine 1 according to an embodiment of the present invention is formed by connecting a cylindrical front cylinder 3 and a cylindrical rear cylinder 5 so as to be bendable. A machine body 7 is provided. In addition, the rear end portion of the front barrel 3 is superposed on the front end portion of the rear barrel 5, and the rear barrel 5 has a convex rear curved surface 5m outside the front end portion, 3 has a concave front curved surface 3m in sliding contact with the rear curved surface 5m inside the rear end portion. Here, the center of curvature of the rear curved surface 5 m (front curved surface 3 m) is the center C of the folding machine body 7.

  An inner flange 5f is formed on the inner side surface in the vicinity of the front end portion of the rear barrel 5, and a plurality of rear support pieces 5p protruding inward are provided in front of the inner flange 5f on the inner side surface of the rear barrel 5. It is formed at intervals. A plurality of front support pieces 3p protruding inward are formed at equal intervals on the inner side of the front barrel 3.

  A ring-shaped erector support member 9 is rotatably provided inside the rear cylinder 5 via a plurality of guide rollers (not shown). The segment 11 is assembled on the excavation wall surface of the erector support member 9. An attached erector device 13 is provided. The inner flange 5f of the rear barrel 5 is provided with an erector motor 15 for rotating the erector support member 9, and the main shaft 17 is integrally provided on the output shaft of the erector motor 15. A driven gear 19 meshed with the main drive gear 17 is integrally provided on the outer surface of the erector support member 9.

  A plurality of shield jacks 21 for advancing the excavator main body 7 (in other words, the shield excavator 1 as a whole) by the reaction force from the assembled segment 11 are equally spaced in the circumferential direction on the inner flange 5f of the rear barrel 5. It is arranged. For convenience of explanation, only the shield jack 21 is hatched in FIGS. 2 and 3.

  Inside the excavator main body 7, a plurality of middle-folding jacks 23 that bend the front barrel 3 with respect to the rear barrel 5 with respect to the middle folding center C are arranged at intervals in the circumferential direction. Further, the front end portions of the plurality of middle-folded jacks 23 are respectively connected to the front support pieces 3p of the front barrel 3, and the rear end portions of the plurality of middle-folded jacks 23 are respectively connected to the rear support pieces 5p of the rear barrel 5. Has been.

  A partition wall 27 is integrally provided on the inner side surface near the front end of the front barrel 3 so as to partition the cutter chamber 25 between the front face 3 and the support block 29 is integrally provided on the partition wall 27. The support block 29 is rotatably provided with a cutter head 31 for excavating natural ground. In other words, the cutter head 31 is rotatably provided on the front barrel 3 via the support block 29 and the partition wall 27. Further, the cutter head 31 protrudes forward from the front barrel 3 and includes a number of cutter bits 33.

  A support frame 35 is integrally provided on the rear side surface of the partition wall 27, and a plurality of cutter motors 37 that rotate the cutter head 31 are disposed on the support frame 35 at intervals in the circumferential direction. ing. Further, a main driving gear 39 is integrally provided on the output shafts of the plurality of cutter heads 31, and a driven gear 41 meshed with the plurality of main driving gears 39 is integrally formed on the rotation shaft 31 s of the cutter head 31. Is provided.

  A screw conveyor 43 that conveys excavated earth and sand from the cutter chamber 25 backward is provided inside the excavator main body 7. The excavated earth and sand conveyed by the screw conveyor 43 is conveyed to the ground by a belt conveyor (not shown) or the like. Instead of the screw conveyor 43, a mud pipe that sends muddy water to the cutter chamber 25 and a mud pipe that discharges muddy water containing excavated soil from the cutter chamber 25 may be used.

  A tail seal member 45 is provided at the rear end portion of the rear trunk 5 to prevent intrusion of groundwater, earth and sand, etc. from the outer surface of the existing segment 11 to the inside of the excavator main body 7. Although not described in detail, groundwater, earth and sand, etc. are prevented from entering the excavator main body 7 from the support block 29, the rear end portion of the front barrel 3, the front end portion of the rear barrel 5, and the like.

  Next, the main part of the embodiment of the present invention will be described.

As shown clearly in FIG. 1 , the shield machine 1 is configured such that the rear curved surface 5m of the rear cylinder 5 and the front curved surface 3m of the front cylinder 3 are positioned between the inner flange 5f of the rear cylinder 5 and the rear support piece 5p. In addition, each middle folding jack 23 is configured to be positioned forward of the middle folding center C, and the front end portion of each middle folding jack 23 is located forward of the rear side surface of the cutter motor 37. It is configured as follows. Further, the shield machine 1 is configured such that the axis of each cutter motor 37 is folded inward and is closer to the axis of the front barrel 3 than the axis of the jack 23.

As shown clearly in FIG. 1, the storage space adjacent to the rear curved surface 5 m of the rear cylinder 5 between the rear end portion of each middle bent jack 23 inside the rear cylinder 5 and the inner flange 5 f of the rear cylinder 5. S is configured to be partitioned. Further, the shield machine 1 is configured such that another storage space S ′ is defined in front of the inner flange 5 f of the rear trunk 5. For convenience of explanation, only another storage space S ′ is hatched in FIG.

  Furthermore, the shield machine 1 has an annular bent jack region 23A in which a plurality of bent jacks 23 are arranged, and an annular shield jack region 21A in which a plurality of shielded jacks 21 are arranged at least partially overlap with each other when viewed from the cross section. It is configured.

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

  The cutter head 31 is rotated by driving a plurality of cutter motors 37. Then, while balancing the pressure of the excavated earth and sand in the cutter chamber 25 and the earth pressure of the face, the excavator body 7 is advanced by the reaction force from the assembled segment 11 by the operation of the plurality of shield jacks 21. The ground is excavated by the cutter head 31 while stabilizing the face. In order to balance the pressure of the excavated earth and sand in the cutter chamber 25 and the earth pressure of the face F, the propulsive force by the plurality of shield jacks 21 and the conveyance amount of the excavated earth and sand conveyed by the screw conveyor 43 are adjusted. In parallel with the excavation of the natural ground, the erector support member 9 is rotated by driving the erector motor 15 to position the erector device 13 in the circumferential direction of the digging wall surface, and the erector device 13 segments the digging wall surface. 11 is assembled in a ring shape. Further, the excavation of the natural ground and the assembly of the segments 11 as described above are performed continuously. As described above, a shield tunnel can be constructed.

  Here, during excavation of the natural ground, the front barrel 3 is bent with respect to the rear barrel 5 with respect to the middle folding center C by appropriately adjusting the stroke amount of the plurality of middle folding jacks 21, and the shield excavation is performed. The excavation direction of the entire machine 1 can be changed, and a shield tunnel having a curved portion can be constructed (general operation of the shield excavator 1).

In addition to the general operation of the shield machine 1 described above, the shield machine 1 is configured such that each of the middle folding jacks 23 is positioned forward of the middle folding center C , and the inside of the rear trunk 5 is Since the storage space S is defined between the rear end portion of each middle folded jack 23 and the inner flange 5f of the rear trunk 5, the plurality of shield jacks 21 and the plurality of middle folded jacks 23 are used. In addition, it is not necessary to arrange the storage space S on the axial center side of the rear cylinder 5 (or on the axial center side of the front cylinder 3).

  Further, the shield machine 1 is configured such that the front end portion of each middle folding jack 23 is positioned forward of the rear end portion of the cutter motor 37, and the axis of each cutter motor 37 is folded halfway. Since it is configured to be closer to the axial center side of the front barrel 3 than the axial center, even if the storage space S is defined between the rear end portion of the middle-jack jack 23 and the inner flange 5f of the rear barrel 5, An increase in the overall length of the excavator main body 7 can be suppressed.

  As described above, according to the embodiment of the present invention, the increase in the overall length of the excavator main body 7 is suppressed, and the axial center side (or the front trunk) of the rear cylinder 5 with respect to the plurality of shield jacks 21 and the plurality of middle folding jacks 23. 3), it is not necessary to arrange the storage space S, so that the cavity of the excavator main body 7 can be expanded without lowering the control performance of the shield excavator 1 in the excavation direction. Workability such as maintenance can be improved. In particular, the shield machine 1 is configured such that the annular bent jack region 23A and the annular shield jack region 21A overlap at least partially when viewed from the cross-section, so that the cavity of the machine 7 can be further expanded. And the effects described above can be further improved.

  Note that the present invention is not limited to the description of the above-described embodiments of the invention. For example, the shield machine 1 can be appropriately changed such as changing from the X-folding type to the V-folding type. is there.

It is a longitudinal cross-sectional view of the shield machine concerning embodiment of this invention. It is a cross-sectional view along the II-II line in FIG. A plurality of rear support pieces are omitted. FIG. 3 is a transverse sectional view taken along line III-III in FIG. 1. FIG. 4 is a transverse sectional view taken along line IV-IV in FIG. 1. It is a longitudinal cross-sectional view of the conventional shield machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shield engraving machine 3 Front trunk 5 Rear trunk 5f Inner flange 7 Excavator main body 13 Electa device 21 Shield jack 23 Folding jack 31 Cutter head 37 Cutter motor S Storage space

Claims (2)

A cylindrical front cylinder and a cylindrical rear cylinder are connected so as to be bendable, and the front end of the rear cylinder is superposed on the rear end of the front cylinder, and the outside of the front end of the rear cylinder Has a convex rear curved surface, has a concave front curved surface in sliding contact with the rear curved surface inside the rear end portion of the front cylinder, and an inner flange is formed on an inner surface near the front end portion of the rear cylinder. A plurality of rear support pieces projecting inwardly in front of the inner flange on the inner side surface of the rear cylinder are formed along the circumferential direction, and a plurality of front support pieces projecting inward on the inner side of the front cylinder are formed. An excavator body formed along the circumferential direction ;
An erector device which is provided inside the rear trunk and assembles a segment on the excavation wall ;
A plurality of shield jacks disposed on the inner flange of the rear trunk at intervals in the circumferential direction and for advancing the main body of the excavator by reaction force from the assembled segments ;
Arranged circumferentially at the inner side of the machine body, the front end is connected to the front support piece of the front cylinder, and the rear end is connected to the rear support piece of the rear cylinder. A plurality of middle-folded jacks that are connected to each other, and that bend the front torso with respect to the rear torso with reference to a center of bending that is a center of curvature of the rear curved surface of the rear torso ,
A cutter head provided rotatably on the front torso, protruding forward from the front torso, and excavating natural ground ;
The front is arranged at a distance inwardly in the circumferential direction of the cylinder, with each other comprises a, plurality of cutter motor for rotating the cutter head,
The rear curved surface of the rear cylinder and the front curved surface of the front cylinder are positioned between the inner flange of the rear cylinder and the rear support piece, and each of the middle folded jacks is centered on the middle folding center. The front end of each of the bent jacks is positioned forward of the rear side of the cutter motor, and the axis of each cutter motor is bent. the axial center of the jack is configured to stop at the axial center side of the front torso, the rear between the inner flange of the rear portion and the rear cylinder of the jack bending in each of the in the inside of the rear cylinder A shield machine , wherein a storage space adjacent to the rear curved surface of the trunk is defined.   When viewed from a cross-section, an annular middle folded jack region in which a plurality of the middle folded jacks are arranged and an annular shield jack region in which the plurality of shield jacks are arranged at least partially overlap each other. Item 2. A shield machine according to item 1.

Images